55LX6500 3D Presentation

55LX650055LX65001080P 55LX650055LX6500LED Backlights

1080PDirect View LCD

TRAININGMANUALMANUAL

LCD-DV Troubleshooting55" Class Full HD 1080PLCD TV (54.6" diagonally)

Published October 22nd, 2010Updated January 26th, 2011

OUTLINEOUTLINE

Preliminary Section:yContact Information, Preliminary Matters, Specifications,LCD Overview, General Troubleshooting Steps, Signal Distribution, Disassembly Instructions and Voltages

Troubleshooting Section: Board Operation Troubleshooting of :

Signal Distribution, Disassembly Instructions and Voltages

Disassembly Section: Removal of Circuit Boards

• Switch Mode Power Supply

• Inverter Boards Main and Secondary (LED Backlight Drivers)

• T-CON/3D Board

• Main Board

• Soft Touch Keys

• Ft Control Board

October LCD TV 55LX65002

• Speakers

55LX6500 LCD Direct View Display

Overview of Topics to be DiscussedOverview of Topics to be Discussed

55LX6500 LCD Direct View Display

Section 1This Section will cover Contact Information and remind the Technician of Important Safety Precautions for the Customers Safety as well as the Technician and the Equipment.

Basic Troubleshooting Techniques which can save time and money sometimes can be overlooked. These techniques will also be presented.

Thi S ti ill t th T h i i f ili ith th Di bl Id tifi ti dThis Section will get the Technician familiar with the Disassembly, Identification and Layout of the LCD Display Panel.

f S f CAt the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability and knowledge necessary to safely remove and replace any Circuit Board or Assembly.


IMPORTANT SAFETY NOTICEIMPORTANT SAFETY NOTICE

Preliminary Matters (The Fine Print)Preliminary Matters (The Fine Print)

IMPORTANT SAFETY NOTICEIMPORTANT SAFETY NOTICE

The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product, personal injury and property damage can result. The manufacturer or seller maintains no liability for the interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury If wires screws clips straps nuts or washers used to complete a ground path are removed foruser injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.

CAUTIONCAUTIONCAUTIONCAUTION

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be g p p , p y p g yaware that many household products present a weight hazard. At least two people should be involved in the installation or servicing of such devices. Failure to consider the weight of an product could result in physical injury.


ESD NoticeESD Notice (Electrostatic Static Discharge)(Electrostatic Static Discharge)

Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage the electronics in a manner that renders them inoperative or reduces the time until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before removing a replacement part from its package, touch the anti-static bag to a ground connection point orremoving a replacement part from its package, touch the anti static bag to a ground connection point or unpainted metal in the product. Handle the electronic control assembly by its edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

l fl fRegulatory InformationRegulatory Information

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful g p p ginterference when the equipment is operated in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user isradio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help.


Customer Service (and Part Sales) (800) 243-0000

LG Contact Information

Technical Support (and Part Sales) (800) 847-7597USA Website (GSFS) http://gsfs-america.lge.comCustomer Service Website http://www.us.lgservice.comKnowledgebase Website http://lgtechassist.comLG Web Training https://lge.webex.com

New: 2010/11 Wireless Ready Models Software Downloads

Presentations with Audio/Video and Screen Notations

LG CS Learning Academy http://ln.lge.com/ilearn http://136.166.4.200

Training Manuals, Schematics with Navigational Bookmarks, Start-Up Sequence, Owner’s Guides, I t t Di Di i C t ID P d t Pi t d F t

Also available on the Plasma Page:PDP Panel Alignment Handbook,

Plasma Control Board ROM Update (Jig required)

Interconnect Diagrams, Dimensions, Connector IDs, Product Pictures and Features.

Published October 2010 by LG Technical Support and TrainingLG Electronics Alabama, Inc.

Plasma Control Board ROM Update (Jig required)

October 2010 LCD TV 55LX65006

201 James Record Road, Huntsville, AL, 35813.

Safety and Handling RegulationsLCD Direct View OverviewLCD Direct View Overview

1. Approximately 20 minute pre-run time is required before making any picture performance adjustments from the Menu.

2. Refer to the Voltage/Current silk screening on the Switch Mode Power Supply.3. C-MOS circuits are sensitive to static electricity.3. C MOS circuits are sensitive to static electricity.

Use caution when dealing with these IC and circuits.4. Exercise care when making voltage and waveform checks to prevent costly short circuits

from damaging the unit. 5. Be cautious of lost screws and other metal objects to prevent a possible short in the 5 e cau ous o os sc e s a d o e e a objec s o p e e a poss b e s o e

circuitry.

Checking Points to be Considered

1. Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy.

2 Check the model label Verify model names and board model matches2. Check the model label. Verify model names and board model matches.3. Check details of defective condition and history. Example: Oscillator failure dead set, etc…


Basic Troubleshooting StepsBasic Troubleshooting Steps

Define, Localize, Isolate and Correct

•Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor Frequency of power supplies will change with the load or listen forand give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc. Observation of the front Power LED may give some clues.

•Localize After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check shouldchecked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.

•Isolate To further isolate the failure, check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failureglitches or road bumps will be an indication of an imminent failure.

•Correct The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer


perform a Safety AC Leakage Test before returning the product back to the Customer.

55LX6500 PRODUCT INFORMATION SECTION55LX6500 PRODUCT INFORMATION SECTION

This section of the manual will discuss product information as it relates to pthe 55LX6500 3D LCD Direct View Display


Wireless Media Box (Sold Separately)

Wireless Media BoxWireless Media Box

The Wireless Media box communicates to the television via a wireless receiver called a “Dongle”. The Dongle attaches to the Television via two connections:

1. HDMI Cable from the Dongle to the TV to transfer Audio and Video Signals.2 Wi d R t bl b t th TV d D l f C t l F ti2. Wired Remote cable between the TV and Dongle for Control Functions.

Media Box

Wired Remote to control the Media Box

Wi l R i /T itt

TV A/V Inputs

Wireless Receiver/Transmitter“Dongle”

Attaches via Velcro tothe back of the set

HDMI


HDMI

Wireless LAN (Sold Separately)

Wireless LAN (DLNA Adaptor)Wireless LAN (DLNA Adaptor)

1(DLNA: Digital Living Network Alliance)

Using the LG Wireless LAN for Broadband/1DLNA Adaptor, which is sold separately, allows the TV to connect to a wireless LAN network. The DLNA adaptor attaches to the Television via either of the two USB connections:

1(DLNA: Digital Living Network Alliance)

Wireless RouterDLNA Adaptor Wireless RouterDLNA Adaptor“Dongle”Side A/V Inputs


Key FeaturesKey Features

3D R d * ENERGY STAR® Q lifi d• 3D Ready*• LED Plus w/Local Dimming• NetCast™ Entertainment Access*

(Wi Fi® R d )

• ENERGY STAR® Qualified• Intelligent Sensor• AV Mode II (Cinema, Sports, Game)

Cl V i II• (Wi-Fi® Ready)• Wireless 1080p Ready*• DLNA Certified® (JPEG Only)• TruMotion 240Hz

• Clear Voice II• ISFccc® Ready• 24P Real Cinema• USB 2 0 (JPEG MP3 DivX HD)• TruMotion 240Hz

• Full HD 1080p Resolution• 8M:1 Dynamic Contrast Ratio• Picture Wizard II (Easy Picture Calibration)

• USB 2.0 (JPEG, MP3, DivX HD)• DivX® HD• 4 HDMI™ V.1.4a Inputs• SIMPLINK™ Connectivity• Picture Wizard II (Easy Picture Calibration)

• Smart Energy Saving• SIMPLINK Connectivity• Dolby® Digital 5.1 Decoder• Infinite Sound

*3D - For a small percentage of the population, the viewing of stereoscopic 3D video may cause discomfort such asheadaches, dizziness or nausea. If you experience any symptoms, discontinue using the 3D functionality and contactyour health care provider. 3D glasses required and sold separately. NetCast internet connection & subscriptions requiredand sold separately. Wireless 1080p Ready requires the Wireless Media Hub which is sold separately. Design, features andspecifications are subject to change without notice. Non-metric weights and measurements are approximate.© 2010 LG Electronics USA, Inc. All rights reserved. “LG Life’s Good” is a registered trademark of LG Corp. All other


© 2010 LG Electronics USA, Inc. All rights reserved. LG Life s Good is a registered trademark of LG Corp. All otherproduct and brand names are trademarks or registered trademarks of their respective companies. 06/22/10

Logo Familiarization Page 1 of 4Logo Familiarization Page 1 of 4

The third dimension. Bring your content alive with 3DThe third dimension. Bring your content alive with 3D technology*! The astonishing effects will immediately grab your attention and bring your entertainment experience to the next dimension.*3D - For a small percentage of the population the viewing of stereoscopic 3D video may3D For a small percentage of the population, the viewing of stereoscopic 3D video may cause discomfort such as headaches, dizziness or nausea. If you experience any symptoms, discontinue using the 3D functionality and contact your health care provider. 3D glasses required and sold separately.

Prepare to be dazzled. Tired of dark scenes or dull colors? LG’s LED Plus technology provides even greater control of brightness through local dimming to deliver amazing clarity and color detail, as well as a more energy efficient TV, gycompared to conventional TVs.

Entertainment on tap. NetCast Entertainment Access brings the best Internet services direct to your TV—no computer required. Instantly access movies and TV shows, news and weather and the world’s largest library of


HD movies in 1080p.


FULL HD RESOLUTION 1080P HD R l ti Pi l 1920 (H) 1080 (V)FULL HD RESOLUTION 1080P HD Resolution Pixels: 1920 (H) × 1080 (V)Enjoy twice the picture quality of standard HDTV with almost double the pixel resolution. See sharper details like never before. Just imagine a Blu-ray disc or video game seen on your new LG Full HD 1080p TV.

HDMI (1.3 Deep Color) Digital multi-connectivity HDMI (1.3 Deep color) provides a wider bandwidth (340MHz, 10.2Gbps) than that of HDMI 1.2, delivering a broader range of colors, and also drastically improves the data-transmission speed.

Invisible SpeakerPersonally tuned by Mr. Mark Levinson for LG TAKE IT TO THE EDGE newly introduces ‘Invisible Speaker’ system,

y p p

y p y ,guaranteeing first class audio quality personally tuned by Mr. Mark Levinson, world renowned as an audio authority. It provides Full Sweet Spot and realistic sound equal to that of theaters with its Invisible Speaker.

AV Mode "One click" Cinema, THX Cinema, Sport, Game mode.TAKE IT TO THE EDGE is a true multimedia TV with an AV Mode which allows you to choose from 4 different modes of Cinema, Sports and Game by a single click of a remote control


and Game by a single click of a remote control.


Clear Voice Clearer dialogue sound Automatically enhances and amplifies the sound of the human voiceAutomatically enhances and amplifies the sound of the human voice frequency range to provide high-quality dialogue when background noise swells.

Save Energy, Save MoneySa e e gy, Sa e o eyIt reduces the plasma display’s power consumption.The default factory setting complies with the Energy Star requirements and is adjusted to the comfortable level to be viewed at home.(Turns on Intelligent Sensor).

Save Energy, Save MoneyHome electronic products use energy when they're off to power features like clock displays and remote controls. Those that have earned the ENERGY STAR use as much as 60% less energy to perform these functions while providing theuse as much as 60% less energy to perform these functions, while providing the same performance at the same price as less-efficient models. Less energy means you pay less on your energy bill. Draws less than 1 Watt in stand by.

TruMotion 240HzTruMotion 240HzUnblur the action. See sports, video games and high-speed action with virtually no motion blur and in crystal clarity with LG’s TruMotion 240Hz technology. Now your TV can keep up with the fastest moving scenes.



Wireless ReadyWireless 1080p Connectivity lets you cut loose from messy wires andWireless 1080p Connectivity lets you cut loose from messy wires and still get a stunning Full HD picture. Disclaimer: Wireless media kit required and sold separately.

Picture WizardPicture WizardGet easy self-calibration with on-screen reference points for key picture quality elements such as black level, color, tint, sharpness and backlight levels. Take the guesswork out of picture adjustments with this simple-to-use feature. It's not actually magic, but it will sure seem that way.

8M:1 Contrast RationExperience deeper blacks and richer colors.You won’t believe your eyes. Worrying about dark scenes is a thing of the past. The ultimate mega contrast ratio of 8,000,000:1 delivers stunning colors and deeper blacks.

E S lf C lib tiEasy Self CalibrationFind the perfect picture. Get easy self-calibration with on-screen reference points for key picture quality elements such as black level, color, tint, sharpness and backlight levels. Take the guesswork out of picture adjustments with this simple-to-use feature. It’s not actually


p j p ymagic, but it will sure seem that way.

55LX6500 Remote Control55LX6500 Remote Control

Top Half Bottom Half


Remote AKB72914018

Accessing the Service MenuAccessing the Service Menu

To access the Service Menu.1) You must have either Service Remote. )

p/n 105-201M or p/n MKJ391708282) Press “In-Start”3) A Password screen appears.4) Enter the Password.)

Note: A Password is required to enter the Service Menu. Enter; 0000Se ce e u te ; 0000

Note: If 0000 does not work use 0413.


MKJ39170828105-201M

1. Country Group (Press OK to Save) Country Group Code Country Group Country2. Tool Option Tool Option 1 Tool Option 2 Tool Option 3 Tool Option 4 Tool Option 53. Adjust White Balance:4. Adjust ADC: 4809 Component 1080p Component RGB5. EDID(AC3): RGB HDMI1 HDMI2 HDMI3 HDMI4

02USUS

46048302915636445241579

OK(12) OK

OKOKOK

OKOK (0x1D)

OK (0x4,0x0)OK (0x4,0xF0)OK (0x4,0xE0)OK (0x4,0xD0)

IN SARTModel Name: 55LX6500-UBSerial Number: 003PTLC2Q032S/W Version: MICOM VersionBOOT VersionFRC VersionIR LED VersionEDID Version (RGB)EDID Version (HDMI)Chip TypeWireless Host Ver.Wireless B/B/ Ver.Vi-Fi VersionVi-Fi ChannelWi-Fi MAC : 00:00:00:00:00:00MAC Address : 00:E0:91:D8:60:7FESN Num. : LGE-LX6500XXXXXXXXXXXXXXLocal Dimming Ver.FPGA VersionDebug Status

UTT : 75APP History Ver.:51882PQL DB:LGD_EF_LGT10_xxxxxx

1. Adjust Check2. ADC Data3. Power Off Status4. System 15. System 26. Model Number D/L7. Test Option8. External ADC9. Spread Spectrum10. Sync Level11. Wireless Ready12. Stable Count13. ODC Test14. Local Dimming

Adjust Check

: 04.10.04.01: 3.05.4: 1.03.07: 13.49: c9: 0.01: 0.03: BCM 3549: 0.00.0: 0.00.0:1.0: 6

: 0x0703: 3.9: RELEASE

Unit Total Time

SW Version

CountryGroup

Audio Mode

55LX6500 Service Menu First Page55LX6500 Service Menu First Page

19 October 2010 55LX6500 LCD-DV

TV Rear Input / Output JacksTV Rear Input / Output JacksSide In/OutUSB1 or USB2 for Software

Upgrades, Wireless Dongle, Music and Photos

Rear In/Out Jacks

USB 2LAN USB 2

USB 1USB 1

Component or Composite

Video/Audio 3

MAIN BOARD

Wireless Media BoxRemote Jack

HeadPhones

MAIN BOARDRear and Side

Input/Output locationsHDMI 4


Software Updates (New and Changed Functions)Software Updates (New and Changed Functions)

A wireless Internet Connection will work for Automatic Software Downloads., however if there are problems completing download, a Wired Internet Connection is preferredp p g , p

For network setup assistance, press the green button for the Simple Manual

Bring up the Customer’s Menu then Press the Red button on Remote Scroll down to item 9 Network Connections

With Software Update Highlighted, Press Select on Remote


Continue on next page

Software Updates (New and Changed Functions) ContinuedSoftware Updates (New and Changed Functions) Continued

Automatic Internet Software UpdateOff A tomatic Soft are pdate does not ork- Off : Automatic Software update does not work

- On : if new Software released, Software download notice appears at turn on with two choices, Yes and Remind Me Later.

Check Update versionCheck Update version- comparison current software version and

Released software version

Additional TV Checks can be made by

After completion of the test, a Pop up menu is displayed with preloaded back ground picture.Select NO if everything is OK.

yScrolling down.Picture, Sound and Network Test

y g

If you select Yes;Service call number, Model name,SW version and serial No. is displayed. Note: Confirm the “Suffix” of the model number.

If the Main board is replaced, the Model and Serial number must be reinserted


into memory. See Model Number D/L.

1) Create an LG_DTV folder on the USB Flash Drive

USB Automatic Software Download Instructions (Generic)USB Automatic Software Download Instructions (Generic)Currently Installed Version

Software Version

found on the USB Flash

DriveDrive

File found on the USB Flash Drive

2) Copy new software (xxx.epk) to "LG_DTV" folder. Make sure to have correct software file.

3) With TV turned on insert USB flash drive3) With TV turned on, insert USB flash drive.4) You can see the message

“TV Software Upgrade” (See figure to right)5) Cursor left and highlight "START" Button and

push “Enter” button using the remote control. 6) You can see the download progress Bar.7) Do not unplug until unit has automatically

restarted.8) When download is completed, you will see

“COMPLETE”

* CAUTION: Do not remove AC power or the USB Flash Drive. Do not turn off Power, during the upgrade process.


COMPLETE . 9) Your TV will be restarted automatically.

Software Files are now available fromLGTechassist.com

Manual Software Download Instructions: GenericManual Software Download Instructions: Generic

Prepare the Jump Drive as described in the “USB Automatic Download” section and insert it into either of the USB ports.p p pBring up the Customer’s Menu and scroll to “OPTIONS”.Press the “FAV” key 7 times to bring up the Manual Download Screen.

Highlight the Software update file g g pand press “SELECT” to begin the download process.

WARNING:Use extreme CautionUse extreme Caution when using the Manual “Forced” Download Menu. Any file can be downloaded when

Example of files foundOn the Jump Drive

selected and may cause the Main board to become inoperative if the incorrect file was selected.


47LX9500 Model Number Download Screen47LX9500 Model Number Download Screen


1. Adjust Check2. ADC Data3. Power Off Status4. System 15. System 26. Model Number D/L7. Test Option8. External ADC9. Spread Spectrum10. Sync Level11. Wireless Ready12. Stable Count13. ODC Test14. Local Dimming

0. Model Name1. Serial Num.

Model Number D/L

Press OK to Save

55LX6500-UB003PTLC2Q032

Bring up the Service Menu using the Service Remote.Scroll down to item 6. Model Number D/L to highlight.Press “Select” or “Cursor Right”. Change the Model and Serial Number to match.

To Change the Model Number Use the cursor right or left to select the area to change. Use the cursor up or down to change.Cursor right until there is no text cursor blinking.Scroll down to highlight “Serial Number” and change.

Resetting the UTT (Unit Total Time) Count after Panel ReplacementResetting the UTT (Unit Total Time) Count after Panel Replacement

UTT Unit Total Time

Scroll to highlight(System 1)

Then Right Cursor

Scroll to highlight(UTT Reset)

Then Right Cursor

After Reset (Doing) has completed, Reset

returns


Then Right Cursor Then Right Cursor returns.After Exit the UTT

Timer is “0”

4) Cursor Left to only highlight the briefcaseon the left

Accessing the Host Diagnostic Screen Accessing the Host Diagnostic Screen (Page (Page 1 of 2)1 of 2)

1) Place Television on a digital channel.

2) Bring up the Customer’s Menu and highlight Options

on the left.

3) The Option Menu appears5) Press the (1) Key 5 to 8 times.


See next page for more details.

Wireless Host Ver:0.00.0Wireless B/B Ver:0.00.0RF Region Config : Not ConfiguredMedia Box Type : Not ConfiguredRF Frequency (Value):Auto (N.A.)Uplink RF Power gain (Value):Auto (Min 0)Downlink RF Power gain (Value):Auto Link Mode : UnicastRX MAC Address : ff:ff:ff:ff:ff:ffTX MAC Address : ff:ff:ff:ff:ff:ffWireless connection status:DisconnectedAverage SNR [db]:0.0(0)

Host Information

Memory

Host Release Version

FAT Status (Main)

Current Channel (Main)

DVI/HDMI StatusCan’t display this information now

Host Diagnostics

Model Name : 55LX6500-UA (Liquid Crystal Display)

FLASH : 524288 KBDRAM : 524288 KBNVM : 128 KB

Firmware Version(MP) : 4.10.04.01(51822)Micom Version : 3.05.4Compile Date & Time : 20101112 & 15:17:49Compile User : kyuhae.lee

Center Frequency : 663.00 MHzPCR lock : LockedModulation mode : QAM 256Carrier lock status : LockedSNR : 40 dBSignal level : 100%

Half Page Move Page ExitCH

Channel Info : Digital 19-2

Parental Control : Channel is not blocked

28

Understanding the Host Diagnostic Screen (Page 2 of 2)Understanding the Host Diagnostic Screen (Page 2 of 2)

October 2010 55LX6500 LCD-DV

Channel Selected

Software Version

Blocked or not Blocked

Channel Frequency

Program Clock Reference (Locked or No)Channel Type (8VSB, QAM 64, 256)

Channel (Locked or No)Channel Signal to Noise Ratio

Channel Signal Level (Above 80% good)

8VSB (Above 20 is good)QAM 64 (Above 24 is good)

QAM 256 (Above 30 is good)

Service Menu: Downloading EDID Data Pg 1 of 2Service Menu: Downloading EDID Data Pg 1 of 2

1) Press “ADJ” key. 2) Scroll down and select either “PCM EDID D/L” or AC3 EDID D/L


Service Menu: Downloading EDID Data Pg 2 of 2Service Menu: Downloading EDID Data Pg 2 of 2

3) Highlight “Start” then Press “Select” key

4) When Writing appearsDownloading in progress

5) Downloading Completethen Press Select key. Downloading in progress

When PCM EDID D/L was selected

When AC3 EDID D/L was selected

Note: When PCM is downloaded, AC3 will be N/G and when AC3 is downloaded PCM will be N/G. Thi th t h PCM i OK PCM di i i it d h AC3 i OK AC3 di i


This means that when PCM is OK, PCM audio is priority and when AC3 is OK, AC3 audio is priority.

55LX6500 Product Dimensions55LX6500 Product Dimensions

15.3/4"400mm

31.3/8"797.56mm

51.3/8"1305.56mm

Remove 4 screws to remove stand for

wall mount

22.9/16"573mm

34.1/8"866.14mm

1.3/16"30.48mm

4.5/8"345.44mm

15.3/4"400mm

7.1/2”190mm

8.1/4”210mm

2.11/16" (68.58mm)

Weight w/o Stand 63.5 lbsWeight with Stand 76.1 lbs

Center

There must be at least 4 inches of Clearance on all sides

31

17.13/16”452.5mm

15.11/16"398.78mm

Model No.Serial No.

Label

WattageLocal Dimming 105WFull White 155WStand By 0.1W


1.3/16"117mm

3D SECTION3D SECTION

3DThis section of the manual will discuss theThis section of the manual will discuss the

55LX6500 LCD Direct View Television ability to play 3D material.play 3D material.

Upon completion of this section the Technician will have a better understanding of the how 3D

works.


LG 3D Emitter & GlassesLG 3D Emitter & Glasses

Convenient Emitter built-in to TV

IR Sync

• Wider viewing angle• Longer Viewing distance• Longer battery life

(1.5h charging / 40h battery life)• Better sync performance 600

600

7m

User friendly Glasses1) L-frame for glasses users 3

IR EmitterLocation

) g2) UV coating to prevent scratch 3) LED indicator for user convenience4) Easy to Recharge with USB port

1

2

4


LG 3D TV 3D broadcastingLG 3D TV 3D broadcasting3D for All types of broadcasting signals1. Input of broadcasting signal HD SD Onlinep g g2. Press “3D” button for mode change3. Select type of input source4. In case 3D looks *abnormal, press “L/R

Select” on remote and select “R/L”.

Broadcasting Broadcasting Video

Input

Input

Input(1)

*Abnormality may be caused by reversed L/R order of the input signal. If TV already in Left/Right change to Right/Left or vice versa.

USBPort

ComponentCompositeRF, S-Video

HDMIComponent

RF

(2)(4)

(3)

Top & Bottom Side by Side CheckerBoard

Single frame Sequential


Note: Picture behind the menu is showing a side by side format.

3D Fundamentals3D FundamentalsEach eye looks at an image from slightly different angles. Therefore, the brain takes these two different images and translates them into one image giving us depth perception. This is difficult to reproduce on a 2 dimensional screen We have to come up with a scheme that will allow us toreproduce on a 2 dimensional screen. We have to come up with a scheme that will allow us to see the same image from two different angles giving us 3D effects.

If the two images were added together without

Note: The Left and Right eye are actually seeing the same image but from a different angle, but for this explanation one is shown inverted from the other for clarity purposes simply to show there

g gthe brain doing the calculations to combine them, they appear out of focus.


for this explanation one is shown inverted from the other for clarity purposes simply to show there is a difference between the two images seen by each eye.

3D Active Glasses Type3D Active Glasses Type

Shutter glasses type 3D: Separating left and right images by synchronizing the TV and the glassesSeparating left and right images by synchronizing the TV and the glasses

Fundamentals of Shutter glasses

< Frame 1 > < Frame 2 >

< F 1 >< Frame 1 >

The image is broadcast using two different viewing angles every other frame.

F 2

The 3D Glasses are then synchronized with the two different images to give the 3D effect

Note: The Left and Right eye are actually seeing the same image but from a different angle, but for this explanation one is shown inverted from the other for clarity purposes simply to show there is a difference between the two images seen by each eye.

< Frame 2 >


the two different images to give the 3D effect.They are blanked between scene changes.

images seen by each eye.

Active glasses 3DTV componentsActive glasses 3DTV components

Battery

IR R iReceiver

TN LCD shutter

Syncsignal

TV with built in IR TransmitterShutter Actuator


TT--CON with 3D FormatterCON with 3D Formatter

3D FormatterAll F t f i t il bl d t d b 3D t h l- All Formats of input are available and converted by 3D technology

- Full HD input available - 3D Enhancement

1) Side by Side

2) Top and BottomR

1) Line by Line

3) Checkerboard

4) F S ti l

3D FormatterR

L 2) Frame by Frame

4) Frame Sequential(Full Resolution available) L


55LX6500 3D Troubleshooting Flow Chart Page 1 of 355LX6500 3D Troubleshooting Flow Chart Page 1 of 3

39 October 2010 3D Troubleshooting LCD-DV

Original: p/n: EBR69838801Sub: p/n: EBR72073501

Use Sub p/n for interference on certain remotes.

OK

Check 3D_SYNC LineMain P7800 pin 49T-CON/3D P802 pin 2

Check 3D Emitter Board Connector 1pin : 5V NG

Replace 3D Emitter Assy.

Cable Open

Red Power LED should stay on solid for about 3 sec. then go off. When power button is pressed for Power Off, the LED will blink 3 times.Note 1: The Red LED will blink constantly for 1 minute if battery is discharged.Note 2: Glasses can operate using the USB connector plugged in if batteries are not charged.

Make sure the 3D Glassesare charged

Change the 3D Glasses

No 3D Sync

OK Possible *FPGA (Main) or *FRC (T-CON/3D) has problems.Replace It or T-CON/3D Board.

For details about making the 3D Sync line check, see next page.

Check 3D Emitter Voltage of Main Board

P2401 pin 1 : 5V NG

Disconnect Connector P2401, recheck 5V pin 1.If OK, check 3D emitter board connector pin 1 diode check, should read Open. 5V_Emitter developed by IC2401 pins 6-7

OK

NG

NG*FPGA: Field Programmable Gate Array*FRC: Frame Rate Converter

No 3D

Use a Digital Camera or Cell Phone Camera to look at the transmitter to see if the two LEDs are illuminated.

If you are having trouble seeing 3D, Try changing the 3D selection types if it is difficult to determine what format the 3D movie is in. Example: Top/Bottom, Side by Side, Checker Board, Frame Sequential.Make sure you are using at least version 1.3 HDMI cable. (1.4 HDMI will auto select).

Play a 3D Movie

A simple test is to hold the glasses about 1 ft. in front of you towards a white sheet of paper. The glasses should still able to see the 3D Emitter signal from the TV while playing a 3D movie. If the glasses sync up the paper will appear as looking through normal sun glasses, if not synced, the paper will appear amber in color.

Don’t forget to try swapping the L/R selection by pressing the “3D Setting button” on the remote control. (Blue Button in the Special Function Buttons)

LEDsOn

Charged

NoChange

55LX6500 3D Troubleshooting Flow Chart Page 2 of 355LX6500 3D Troubleshooting Flow Chart Page 2 of 3


Continued from previous page

Q906 (Collector)5.5V p/p 60 Hz

Q907 (Collector)3.9V p/p 60 Hz

“3D-Emitter" to P2401 "Main"

Pin LABEL SBY Run Diode Check

1 +5V_EMITTER 0V 5.1V Open

2 Gnd Gnd Gnd Gnd

3 3D_SYNC 0V 1.6V Open

15) 5.1V6) 0V7) 0V8) Gnd

4) 5.1V3) 1.6V2) 2.15V1) 5.1V

Possible Main or T-CON/3D has problems.

Replace T-CON/3D orMain Board

Should be

OKReplace T-CON

(Formatter B/D)

B) 0.61VE) GndC) 0.03V

Q906

B) 0VE) GndC) 1.9V

Q907

B) 0VE) GndC) 3.5V

Q102IC100

5.3V p/p 12 MHz

5.5V p/p 60 Hz

Check 3D_SYNC Line Main P7800 pin 50 T-CON/3D P802 pin 2

Should be

5.5V p/p 60 Hz

1.6VDC

Check Q906, Q907 of T-CON/3D Board

NG

NG

Additional Information On the 3D Emitter Board

LED LED

To TFT Panel

3D IR

Check 3D_SYNC Line Main P802 pin 2

Check 3D_SYNC LinePin 3

Main Board

P7800 Pin 50

P2401Pin 3

A1

A2 C

P805

IC1000

EB

C E B

C

EB

CEB

C

P806

IC102

P101X100

25MHz

IC600

2.52V

2.53V

3.4V

13

25

48

P802P804P803

IC502

IC307IC200

IC205IC302L306

IC301L305

IC304

IC1002 IC1001

IC500 IC400

SW400

IC801

L314

IC308

Q700

L700

IC201

IC204

IC700

Q702L702

IC305

L309

IC306

L601

EB

C

EB

C

P900

L307

L600IC309

IC501

Q1004Q1003

Q1002Q1001

L701 Q701

Q906Q907

D602

D600

D601

L802

11.42VLVDS 12V

TP

n/c

A1A2C

D603

IC310

B) 0.61VE) GndC) 0.03V

Q906

B) 0VE) GndC) 1.9V

Q907

T-CON3D Board

5.5V p/p 60 Hz

1.6VDC

5.5V p/p 60 Hz

1.6VDC

55LX6500 3D Sync Troubleshooting Flow Chart Page 3 of 355LX6500 3D Sync Troubleshooting Flow Chart Page 3 of 3


Continued from previous page

To TFT Panel

Eye Tiredness InformationEye Tiredness Information

Why your eyes get tired while you’re seeing 3D images :• The color clarity and resolution of 3D images are lower than those of 2D.• 3D images deliver strong effects. Viewing “popping out” images, which is distorted, for a long time

makes you more tired. • Accommodation and convergence (Your both eyes focus a single point)• 3D presentation with glasses displays unnatural images due to no time difference during eye

3DC safety guidelines for distribution of 3D displays suitable for human eyes were made at the 3D Consortium 2006

3D presentation with glasses displays unnatural images due to no time difference during eye movements.

at the 3D Consortium 2006

• It is recommended to see 3D images within a distance of 2m. • The brain is not able to adjust the focus when you are more

than 2m away from the TV.• Customers don’t have the condition for seeing a display

within 2m, below warning sentence should be noticeable.

If it is impossible for customer to view 3D image displayed on the screen 2m away from the display,displayed on the screen 2m away from the display, keep in mind that the convergence angle should not exceed 2 degrees.

• For example, when you see the display 1m away from the TV, th di t f 3D i i t h ld b ithi

The brain gets confused because of the distance difference between the

actual image and the popping up image


the distance of any 3D image popping out should be within 38cm.

image.

DISASSEMBLY SECTIONDISASSEMBLY SECTION

Disassembly:This section of the manual will discuss DisassemblyThis section of the manual will discuss Disassembly,

Layout (Circuit Board Identification) of the 55LX6500 LCD

Direct View TelevisionDirect View Television.

Upon completion of this section the Technician will have a better understanding of the disassembly procedures, the layout of the printed circuit boards and be able to

identify each board.identify each board.


Removing the Back Cover Removing the Back Cover

Remove the 30 screws indicatedRemove the 30 screws indicated.Pay attention to the size and type of screw.

There could be many different types.Putting in an improper screw when utt g a p ope sc e ereassembling may Cause damage.

The AC CordDoes Not unplug

After removing back, put at least one screw back

i th St d


The Stand has to be removed before removing the back.in the Stand

Circuit Board LayoutCircuit Board LayoutWarning: The Frame may have sharp edges

Panel Backlight ConnectionsThese clips will Panel Backlight ConnectionsThese clips will fall. Put screw to

secure.

Clip

Inverter

Main BoardPower Supply

(SMPS)LVDS Cable

Clip Clip

Soft Touch

T-CON/3DClip

Clip

InvisibleIR/LED

Key Board

InvisibleLG LOGO 3D Emitter

Panel Connection Points


InvisibleSpeaker Right

IR/LED Board

InvisibleSpeaker Left

LG LOGO Board

3D EmitterBoard

POWERSUPPLY

Speaker (Front Left)

AC In

55LX6500 Connector Identification Diagram55LX6500 Connector Identification DiagramTFT PANEL


Speaker (Front Right)IR/Intelligent Sensor board

INVERTER

p/n: EBR6948890155LX6500-UB_AUSWLJR

p/n: EBU6098780255LX6500-UB_AUSWLUR

p/n: EAJ61111801

p/n: EAB60961501 p/n: EAB60961501

p/n EBR64966201

p/n: EAY60908802

SK101

P204 P205 P201

CN103 CN102

CN2

P8000

P8800

To TFT Panel

V1~V16If the Panel is replaced, reset the UTTTime. Service Menu, System 1 Item 12

T-CON

P802

P806 P805

P7802P7901

P7800

P8200

P8100n/c

n/cP1000

3D Emitter board

Soft Touch Keys

J3 J2 J1

P803

MAINBOARD

P2401

P101n/c

n/c

P900

Panel Backlight Connections

CN101

P804

P7803

Comes with Panel

Comes with Panel

Center LOGO Original: p/n: EBR69838801

Sub: p/n: EBR72073501Use Sub p/n for interference

on certain remotes.

Power Supply Power Supply Board RemovalBoard Removal

P201

Board is “Thin” be

p/n EAY60908802

Press in gently on

Board is “Thin”, be careful not to flex.

Disconnect P201, P204 and AC In

Press in gently on the two tabs

to release lock

SK101. SK101 fits very snug into it’s connector.

Remove the 6 screws indicated

SK101by the arrows. Press in on the

two tabsto release lock


AC In

Removing the Main BoardRemoving the Main BoardP7800 Flip the locking tab upward,

pull the LVDS ribbon out.p/n EBR69488901 P7802 P7803

Disconnect P2401, P7800, P7802, P7803, P7901, P8200, P8800.

P7800 P7901 P8000P2401

Remove any tape holding down any cables

Press in on the side

release tabs to remove.

P8200

P2300N/C

down any cables.Remove the 5 screws

indicated by the arrows.

Decorative Metal Plate

P2000n/c

NOTE Al h k

Remove decorative plastic and remove the

board.

P8800

After removing the Main, there are tabs sticking through the Main board holding the Metal

plate in place.NOTE: Always check on

top and behind the Large ICs. And look for a piece

of Chocolate(Heat Transfer Material).

Be sure to transfer to

P8800

Main Board Used:


Be sure to transfer to new Board if present.

Main Board Used:EBR69488901 55LX6500-UB_AUSWLJREBU60987802 55LX6500-UB_AUSWLUR

Removing the Inverter BoardRemoving the Inverter BoardComes with the Panel

Disconnect CN2, CN101, CN102 and

CN103

CN103 CN102

Remove the 4 screws indicated by the arrows.

CN103.

Remove the Inverter.

Use caution, do not allow screws to fall.

NOTE If S i i th B d t th

CN101

CN2NOTE: If Servicing the Board, put the screws back in the board to provide

stability and grounding.

Th I t ill ith t

CN2

The Inverter will run without Local Dimming signals being

provided by CN2


Removing the TRemoving the T--CON/3D BoardCON/3D Board

1. Lay the TV down on its face. Use some scratch resistant material to avoid damaging the front frame.2 Remove the stand support bracket that surrounds the T-CON/3D board (6 screws) See Fig 1

Comes with the Panel

2. Remove the stand support bracket that surrounds the T-CON/3D board. (6 screws) See Fig. 1.

1 2

P804P803

3. Disconnect P802, P803, P804, P805 and P806.4. Remove the 4 screws securing the T-CON/3D.

P802Fig. 1

36

P804P803 P802

45

Stand Bracket

1 2Fig. 2

Push InPush In

P8023

4P805P806

P802

P805P806


Flip up the Locking mechanism to release ribbon cable.

Removing the TRemoving the T--CON/3D Board NoticeCON/3D Board NoticeNote: Behind the T-CON/3D are two pieces of Chocolate (Heat transfer material).At the top side there are two cushions. B t l th i if th h ld f llBe sure to replace these pieces if they should fall.

Chocolate

Cushion Cushion

ChocolateChocolate


Removing Front IR BoardRemoving Front IR Boardp/n EBR64966201

Disconnect J1, J2 and J3 connectors.

Tab Tab

Press gently upward on the two tabs at the topAnd gently downward on the two tabs at the bottom.

Lift the board straight up.

J3

To the KeyboardTo the LOGO board

IR Filter is on the front side.

Be careful not to loose it

J2

loose it.

J1

To the MainP8200

Tab Tab


TROUBLESHOOTING SECTIONTROUBLESHOOTING SECTION

Troubleshooting:gThis section of the manual will discuss troubleshooting.

Upon completion of this section the Technician will haveUpon completion of this section the Technician will have a better understanding of how to diagnosis and resolve

problems.


POWER SUPPLY SECTIONPOWER SUPPLY SECTION

This switch mode power supply develops Stand By 3.5V at all times when AC is applied.At power on, it develops 12V and 24V for the Main boardAnd 24V for the Inverter.

This power supply draws less than 1 watt during stand by mode. The fuse F501 reads 159.6V (from hot ground) during this time. (F101 is 2.9V)

When the controller chip receives the PWR-ON command 3.28V via P201 Pin 1, the primary section increases its current supplying ability. Both Primary fuses F101 and F500 now read a little more than 392V.

P201 Connector: (To Main Board)12V (11.81V) is routed out P201 pins 17, 19 and 21 and 24V is routed out P201 pins 2, 3 and 4.

P204 Connector: (To Inverter Board)24V is routed out P204 pins 1 through 5.


55LX6500 Power Supply EAY6090880255LX6500 Power Supply EAY60908802

55

SMPS TEST 1: To Force Power Supply On.Disconnect P8000 on Main board.(A) Jump pins 9, 10, 11 or 12 (3.5V) to pin 1. (Test Voltage Outputs 12V, 24V to Main and 24V to both Inverters). Remove AC power. Leave the jumper in place.

SMPS TEST 2: (B) Jump pins 9, 10, 11 or 12 (3.5V) to pin 18 (INV-ON). Apply AC power, the Backlights should turn on.

Indicates Hot Ground

D601 CathodeSTBY 2.9V

RUN 393.6V

D607/D102 CathodeSTBY 159VRUN 392.6V

D100/D101 CathodeSTBY 57.5V

RUN 66V

(1) P-DIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setting and room light condition. 0.37V 0% to 3.3V 100% and the Intelligent Sensor. Output from the Video Processor IC900.

SMPS TEST 1

P201

A PWR

ON

3 17 511 915 1319 1721

4 28 612 1016 1420 1822

23

24

STBY 3.5V

12V12V

STBY 3.5V

24V24V

24V12V

INV-O

N B

SMPS TEST 2

P201

A PWR

ON

3 17 511 915 1319 1721

4 28 612 1016 1420 1822

23

24

STBY 3.5V

12V12V

STBY 3.5V

24V24V

24V12V

Front pins on connectorare odd numbers.


P201 "SMPS" to P8800 "Main"Pin Label STBY Run Diode Check

12-4 24V 0V 24.57V 0.424V5-8

9-12 3.5V 3.45V13-15

16Gnd Gnd Gnd Gnd

17 12V 0V 11.81V 1.39V

1920

2223

N/C n/c n/c

Open

PWR-ON 0V 3.28V 1.68V

Gnd Gnd GndGnd3.37V Open

N/C n/c n/c N/C

12V 0V 11.81V 1.39V

ERR OUT 0V 0V Open

18 INV-ON 0V 3.17V Gnd

21 12V 0V 1.39V

24N/C n/c n/c Open

Open

0V

(2) I-C is Inverter On

P204 "SMPS" to CN1 "Inverter Main"Pin Label STBY Run Diode Check

1,2,3,4,5 24V 0V 24.49V 0.424V6,7,8,9,10 Gnd Gnd Gnd Gnd

11

(1) P-DIM

Open12 (2) I-C 3.17V1314 n/c n/c

0V0Vn/c

OpenOpenOpen

0.37V~3.3V


SK101AC In

D221

T102 IC502

IC103

IC501

T501

F1013.15A/250V

Q111 Q110

Q231

F1006.3A/250V

CX

103

RL101

GD

S GS

CBE

BD101

+

- Q605

D602

GDS

C A Q606

D603

GDS

C A

L600

L601

F5013.15A/250V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

V

T101 CA1A2

CA1A2

D222

Q251

Q252

P201P205P204CA1

A2

D201

IC102

RL102

CX

102

CX101

D601

D100

D

F501 Hot GndSTBY 159.6VRun 392.6V


D607

D102

D101

C = 3.45VA1/A2 = 0V

SMPS BOARDp/n: EAY60908802

11.81V(1) P-DIM 0.37V~3.3V

n/c n/cn/c

Inverter

POWER SUPPLY (SMPS)

55LX6500 Television Start Up Sequence55LX6500 Television Start Up Sequence

56

Inverter OnStarts the Inverter

24V B+ for the Inverter

Stand By 3.5V

Remote or Power Button Key

MAIN BOARD

RL_ON

12V VideoProcessing

InvOn

Stand By3.5V Reg

2 5 66 8

2

4

5

56

Primary side fuse:Stand-By 161V

Run 392.6V (Hot Gnd)

3

24V Audio

12V 24V

12V

At point TV is in Stand-By state. Energy Star compliant.0 .1 Watts

3

Other Regs

P-DIM = PWM-DIM Digital Dimming

To Panel Backlights

120HzManipulates

Backlight LEDsLow = Bright

Tuner B+

Cust Menu for Backlight

andPicture Content

Manipulate P-DIM

RL_O

n

2

No AC Det in this model

After Mute Released

LVDS Video

Ft IR

INV On

Model 1_Opt1 Panel Control

INV_CTL

Microprocessor IC8101

RL_ON

Tru-Motion LVDS Video

C8108R8184

Q8004

CN101

P201

BridgeP204

To Panel Backlights

Pow

er O

n

Power On

5

24V

P8000

12V/24V Regulators

P8200

Inverter On

P7800Reset

Generator

1AC In

3.5V_ST

P-D

IM

IC80035V_Normal

8

4

P7802 LCD Panel

86

CN102

CN103

5

7

Key 1 or IR

P7901

CN2

7

Videoprocessor

IC900

IC9701

Dimming IC

IC93021.8V

Dimming

7

MOSI, CLK

9

9

P-DIMGlobal Dimming

Local DimmingAffects each of the

16 Blocks independently

10

10


T-CONLVDS Video

10

9

PanelVCC 12V

7

10

Key Board

P803

P802

IC600 developes VGL -5V, VCC 3.4V, VGH 26.6V, VCOM 6V, ZOUT 8V and VDD 16V.

Another IC Q701 develops 8.2V.

12V

P805

P806

J2J1

7

710

P-DIM

n/c n/c n/c


PWM-DIM (PWM Dimming) can vary according to incoming video IRE level, OSD Backlight setting and Intelligent Sensor (room light condition). Range 0.37V to 3.3V.

55LX6500 Television Turn On Commands Circuit Drawing55LX6500 Television Turn On Commands Circuit Drawing

R8019100Ω

11.81V

Gnd

Gnd

Gnd

Gnd

0.37V~3.3V

3.28V

ERR OUT

PWR

INV_CTL

PWM-DIM

SMPSP201

R25

11

MAIN BoardP8000

3.37V

Gnd

1

65

87

109

1211

1415

19

17

21

18

24

22

20

1

65

87

109

1211

1415

19

17

21

18

24

22

20

Gnd

L8003

L8002+12V

C8001100uF

R800010K

10

Q8005+3.3V_Normal

INV_CTL

S

D

7

Q8004

L8015

Panel_Vcc (12V)

3.36V

GQ8003

Model1_Opt_1

1.8V

+12VR8010 10KΩ

C8000100uF

+3.5V_ST

RL_ON

GPIO 09

3.17V

Q8002

L8000

+3.5V_ST

INV_On

PWR-ON

PWM-DIM

IC8101Micro

RL_ON

Power Det 14

VDD40

Key 1 25

Key 2 26

PowerOn/Off 2_220

R80044.7K

3.37V

3.37V

3.37V

11.81V

Q80010V

36

R8060 10KΩ

+3.3V_Normal

11.81V

12V

Gnd13 13

16 16n/c n/c n/c

23 23n/c n/c n/cGnd

Q8000

R803210K

R818722Ω

C81030.1uF

IC900BCM

R10410Ω

R80270Ω

R813522Ω

R8103100Ω

R800147KR8011 1.8K

+12VL8013

IC8005

Power_On/Off2_2R8176

22K

R80261K

0.68V

R8003 22KΩ

11.8V11.79V

11.8V3.36V

0.66V0V

3.41V

3.3V 0V

0V

3.1V

24.65V

11.88V

R813422Ω

32

432

4

L8005+24V

C802468uF

24V

24.57V

12V

12V

Digital Dimming (Variable)

SBY3.5V

MAIN BoardP7802

1ToT-CON

MAIN BoardP7800 LVDS

1ToT-CON

23 4

24.57V

24.57V

40

C8108 0.1uFR8184

47K

ResetR8178 22Ω

IR16

L8016D3.3V

Panel_CTL2

8

2

6

AC Should not be applied at any time while adding jumpers or While unplugging connectors as damage to the circuit Board

Power Supply Board Low Voltage Test 1Power Supply Board Low Voltage Test 1

While unplugging connectors as damage to the circuit Board may occur.

a) When AC is applied, the SMPS “MUST” be producing STBY 3.5V on pins 9, 10, 11 or 12 of P201.

If 3.5V Standby is not being generated, the SMPS is defective and must be replaced. There is no need to continue with the next test.But make sure AC is arriving at the connector SK101But, make sure AC is arriving at the connector SK101.

(b) Unplug P8000 on the Main Board to make insertion of the Jumpers easier. Use P8000 Side to insert resistors

TEST 1 No Backlights during this test

Pin 1 is the Brown Wire

TEST 1:

(1) Add a jumper between (3.5V STBY) pin 7, 8, 9 or 10 and Pin 1 (PWR_ON). Apply AC. This will turn on the power supply, relays will click.a) Check that the 24V and 12V power supplies are turned on,

No Backlights during this test

) p pp ,• P201 (12V pins 17, 19 and 21)• P201 (24V pins 2, 3 and 4) • P204 (24V pins 1 through 5) to the Inverter

(2) Remove AC power


(2) Remove AC power

Continue if the 1st test was OK. Leave original jumper in place

Power Supply Board Backlights Test 2Power Supply Board Backlights Test 2

Leave original jumper in place.

(3) Add another jumper between (STBY_3.5V) pin 9, 10, 11 or 12 and Pin 18 (INV_On).

(4) Apply AC Power. Simulating a Power and Backlight On command.

Backlights Normal:Backlights Normal:a) If normal, the backlights should turn on.

SMPS OK, Inverter OK.

Backlights Abnormal:

Pin 1 is the Brown Wire

Backlights Abnormal:a) Recheck all connections.b) Confirm the INV On/Off line pulling up to at least 3V and arriving at both Inverters. c) Check the connections to the Inverters.

If the 24V and the Inverter On command is arriving at the Inverters in, then see Inverter Section for further testing.

REMOVE AC POWER:


REMOVE AC POWER:

Power Supply Connector P201 Voltage and Diode CheckPower Supply Connector P201 Voltage and Diode Check

P201 Connector “SMPS” to “Main” P8000 P201 Connector

Pin Label STBY Run Diode Check

1 PWR-ON 0V 3.28V 1.7V

2-4 24V 0V 24.57V 0.43V

5-8 Gnd Gnd Gnd Gnd

9-12 3.5V 3.44V 3.37V Open

13-15 Gnd Gnd Gnd Gnd

16 n/c n/c n/c Open 116 n/c n/c n/c Open

17 12V 0V 11.81V 1.4V

18 INV-ON 0V 3.17V Open

19 12V 0V 11.81V 1.49V

Odd pins are on front row

20 n/c n/c n/c Open

21 12V 0V 11.81V 1.4V

22 P-DIM 0V 0.37V~3.3V Open

23 n/c n/c n/c Open

(1) P-DIM Pin 22 can vary according to incoming video IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.37V to 3.3V. .23 n/c n/c n/c Open

24 ERROR 0V 0V Open

Diode Mode values taken with all Connectors Removed


Power Supply Connector P204 Voltage and Diode CheckPower Supply Connector P204 Voltage and Diode Check

P204 1

P204 "SMPS" to CN14 “Inverter Main"


1-5 24V 0V 24.65V 0.424V

6-10 GND GND GND GND

11 (1) P-DIM 0V 0.27V~3.3V Open

12 (2) I-C 0V 2.92V Open

(1) PDIM Pin 11 can vary according to incoming video IRE level, OSD

p

13 n/c n/c n/c Open

14 ERROR 0V 0V Open

y g gBacklight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.27V to 3.3V.

(2) I-C is the Inverter On Control Signal



Power Supply Connector SK101 Voltage and Diode CheckPower Supply Connector SK101 Voltage and Diode Check



EL131 L120Vac

OL

SK101 "SMPS" to AC IN

120VacEL132 N OL

AC Voltage Readings (From Hot Ground)Pins 1 and 2 for STBY and RUN.

F100Bottom Right of SMPS

F100

F100 (Diode Check)

F1006.3A/250V

AC IN

F100 (Diode Check)Main Power Switch Closed

Red or Black Lead on Fuse (Open)Other Lead on Hot Ground

L N

AC IN


SK101

Power Supply F101 and F501 Voltage ChecksPower Supply F101 and F501 Voltage Checks

F501

F5013 15A/250V

F101 F1013.15A/250V

3.15A/250V

From Hot GndSTBY 159.6VR 392 6V

From Hot GndSTBY 2.9VRun 393.3V

Run 392.6V

If reading the voltage on F101 right after power off, it takes a very long time to bleed down to the reading given here.


INVERTER (LED BACKLIGHTS) SECTIONINVERTER (LED BACKLIGHTS) SECTION

The Inverter receives 24V from the SMPS on CN1 pins 1~5. The Inverter On (INV ON) command arriving on CN1 pin 12 starts the Inverter drive signals, (240Hz).g p g , ( )P-DIM is delivered from the Main board through the SMPS to the Inverter on CN1 pin 11.The Inverter is responsible for delivering B+ approx. 134V to each of the 16 LED Blocks. This is accomplished by 2 DC to DC Converters.

Inverter 134VInverter 134V• (M1 134V) IC101, IC1, IC2, Q101, D101, D111 C130, L101 and L102.

Out CN102 and CN103. • (M2 134V) Q141, D141, D151, C170, L201 and L202.

Out CN102 and CN103.

The Inverter must also deliver grounding pulses (Drive Signals) to each of the 16 LED Blocks This isSignals) to each of the 16 LED Blocks. This is accomplished by the 16 switching components, Q202 through Q216.

42V p/p (This shows the LEDs at 50% brightness.L LED O Hi h LED ff


Low = LEDs On. High = LEDs off.

55LX6500 2 Sided Edge Lit Panel (V5)55LX6500 2 Sided Edge Lit Panel (V5)


ONE STRIP (Board)

1 Block 21 LEDs

Connector 4 pin

Front Side Panel View

1 Block

134V

32V p/p

LED Drive Signal 50 IRE

10mSec

DriverOn

Inverter6.38V drop per/LED

GlobalAnd

LocalDimmingControl

CN102 or CN103

TWO SIDED EDGE 2010

Input from SMPS InverterConnector Connector

Connector ConnectorOne LED can be tested with a Diode Check using a DVM. Forward biased, the LED should light.

336 Total LEDs4 Boards (Strips)

84 LEDs per/board

16 Total Blocks (8 on Top, 8 on Bottom)

4 Blocks per/board21 LEDs per/block

1 Block 21 LEDs 1 Block 21 LEDs 1 Block 21 LEDs

Each Connector has (4) Block driver pins and (1) 134V Input pin

134VBlock

Control Signals(Drive)

Connector

LED

66

55LX6500 Inverter Drawing55LX6500 Inverter Drawing

(1) VBR_B (P-DIM) Pin 13 can vary according to incoming video IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.37V to 3.3V.

CN103 "Inverter" To "Panel LEDs" Black Plug Pin Label STBY Run Diode Check1 Out_M1 0V 134V Open

2 n/c 0V Gnd Open

3 V5 0V 1 1V~30V Open

4 V6 0V 1 1V~30V Open

5 V7 0V 1 1V~30V Open

6 V8 0V 1 1V~30V Open

7 V13 0V Gnd Open

8 V14 0V 1 1V~30V Open

9 V15 0V 1 1V~30V Open

10 V16 0V 1 1V~30V Open

12 n/c n/c n/c Open

12 Out_M2 0V 134V Open1 Black to White

CN102 "Inverter" To "Panel LEDs" White PlugPin Label STBY Run Diode Check1 Out_M1 0V 134V Open

2 n/c n/c n/c Open

3 V1 0V 1 1V~30V Open

4 V2 0V 1 1V~30V Open

5 V3 0V 1 1V~30V Open

6 V4 0V 1 1V~30V Open

7 n/c 0V Gnd Open

8 V9 0V 1 1V~30V Open

9 V10 0V 1 1V~30V Open

10 V11 0V 1 1V~30V Open

11 V12 0V 1 1V~30V Open

12 n/c n/c n/c Open

13 Out_M2 0V 134V Open1 Black to White

CN1 "Inverter" To P204 "SMPS" Pin Label STBY Run Diode Check1~5 VIN (24V) 0V 24.49V 1.33V

6~10 GND Gnd Gnd Gnd

11 N/C n/c n/c Open

12 I-C 0V 3.17V Open

13 VBR_B (P-DIM) N/C 0.37V~3.3V Open

14 N/C n/c n/c Open

CN103 "Inverter" To P7901 "Main Board" Pin Label STBY Run Diode Check1 3.3V_MST 0V 3.31V Open

2 Gnd Gnd Gnd 1 Open3 M2_SCLK 0V 0.05V Open

4 Gnd Gnd Gnd Gnd

5 M2_MOSI 0V 3.26V Open

6 Gnd Gnd Gnd Gnd

7 Gnd Gnd Gnd Gnd

8 R_VS LDIM_Reverse 0V 0.02V Open1 Gnd on Main


Transistors Q201 ~ Q216 ground the 16 LED Blocks.Q201 (Block V1) to Q216 (Block V16)Collector Voltage (1V ~ 30V) White to Black.

To The Panel To The Panel

ToSMPS

ToMain

35V220uF

Y112MHz

IC201

250V100uF

250V100uF

250V100uF

+ -

250V100uF

250V100uF

250V100uF

+ -

L101

L102

L201

L202

CN102CN103

D101

D111Q101

Q111

D141

D151Q141

Q151IC102L301

F101 24V12A/65VF102 24V12A/65V

CN101

Q209

Q210Q211Q212

Q213

Q214

Q215

Q216 Q208

Q207

Q206

Q204Q205

Q203Q201

Q202

Q7

CN2

IC1IC2

IC101Q163

Q164

EB

C

Q162EB

CEB

C

Q282Q281

EB

CEB

C

E B

C

E B

C

EB

C

Q283Q285

Q284

Q286Q287

E B

C

IC601C141

35V1000uF

35V1000uF

35V1000uF

+-

35V1000uF

35V1000uF

35V1000uF

+-

M2134V

M1134V

IC103

D16D75

Blinks once a second (Normal)

EB

C

Q161

Q123

Q124

EB

C Q122

EB

CQ121

24V

24V

INVERTER

CN1n/c

If D75 is Onthere is a problem.

CN3n/c

If either connector is disconnected D75 will illuminate, the panel will

still light, but appear dimmer.

35V220uF

Y112MHz

IC201

250V100uF

250V100uF

250V100uF

+ -

250V100uF

250V100uF

250V100uF

+ -

L101

L102

L201

L202

CN102CN103

D101

D111Q101

Q111

D141

D151Q141

Q151IC102L301 CN3

F101 24V12A/65VF102 24V12A/65V

CN

101

Q209

Q210Q211Q212

Q213

Q214

Q215

Q216 Q208

Q207

Q206

Q204Q205

Q203Q201

Q202

Q7

CN2

IC1IC2

IC101

EB

C

EB

CEB

C

Q282Q281

EB

CEB

C

E B

C

E B

C

EB

C

Q283Q285

Q284

Q286Q287

E B

C

IC601C141

35V1000uF

35V1000uF

35V1000uF

+-

35V1000uF

35V1000uF

35V1000uF

+-

M2134V

M1134V

IC103

D16D75

D75 On indicates there is a problem

EB

C

Q123EB

C

EB

C

24V

INVERTER

C130

C17024V

134V

134V

Q122Q121

Q124

Q163 Q162

Q161Q164

67

55LX6500 Inverter Hi-Voltage Output55LX6500 Inverter Hi-Voltage Output


CN102 and CN103134V M1 Pin 1

Local Dimming Signals from the

Main Board

LED DriversQ201~Q216

24V in Pins 1~5 D16 Blinks once a second (Normal)

The Red outlinedArea on the right

Is the Hi-Volt 134VOutput to the LED Blocks.

CN102134V M2 Pin 13

CN103134V M2 Pin 12

The Red outlinedArea on the left is

The 24V input from The Power Supply

Inverter Drivers (Upper Right Side of Board)Inverter Drivers (Upper Right Side of Board)

LED Drivers (See Connector CN102 and CN103 for pin outs)(See Connector CN102 and CN103 for pin outs)

Q201 drives V1 Block, Q202 drives V2 BlockThrough Q216 drives V16

Q201 through Q216B 0.73VC 1~30VE Gnd

You can ground the collector on any of the 16 drivers to turn on an LED block.

Collector of any of the 16 drivers

42V / (Thi h th LED t 50% b i ht


42V p/p (This shows the LEDs at 50% brightness.Low = LEDs On. High = LEDs off.

Inverter 134V LED BInverter 134V LED B++ DC to DC Converter TroubleshootingDC to DC Converter Troubleshooting

2

D111 and D151 pin 1 or 3D101 and D141D101 and D141 pin 1 or 3

D111 and D151

2

1 3

12

3

265.6V p/p 240KHz294V p/p 240KHz

2Q111-Q151 pin 1

2Q111-Q151 pin 2

Q111 and Q151 Q111 and Q151

8 75V p/p 240KHz

1

3 68V p/p 240KHz

1

38.75V p/p 240KHz 68V p/p 240KHz

2Q101-Q141 pin 1

2Q101-Q141 pin 2

Q101 and Q141 Q101 and Q141

1

3

1

3


8.66V p/p 240KHz 3 58.5V p/p 240KHz 3

Maximum P-DIM Voltage100% Cust Backlight Setting

Brightness and Contrast adjustments do not affect P-DIM

The Video Processor has the output that controls P-DIM. If the Microprocessor is separate from the video processor, then the customer’s menu Backlights setting is communicated to the video processor via I2C.

Analog Dimming is not used.It is a fixed voltage. Also called BR1, VBR-A, BCM-VBR-A, ADM

Minimum P-DIM Voltage0% Cust Backlight Setting

P-DIM VoltageEstablishes the maximum threshold or

brightness level of the backlights

3.3V

Brightness of Backlights

After the max. threshold is established by the Customer’s Menu, the DC Level of P-DIM is manipulated by:

Overall Contrast RatioMonitored by the BCM or Mstar Video Processor.

As the overall brightness of the video content decreases, so does P-DIM voltage.

If the Intelligent Sensor is utilized, it too manipulates P-DIM. As the overall room light decreases in intensity, P-DIM

decreases. This data represents nearly 5000 steps in room light monitoring. It is routed from the Front IR board through

I2C data back to the Main board’s Microprocessor.

Midrange P-DIM Voltage50% Cust Backlight Setting 1.68V

0.37V

Backlights Bright

Backlights Dim

100%

0%


P-DIM (Global Dimming) Explained: P-DIM (May also be called PWM-DIM, VBR-B, PDS, BCM-VBR-B)P-DIM (Global Dimming) Explained: P-DIM (May also be called PWM-DIM, VBR-B, PDS, BCM-VBR-B)

70

Inverter Fuse F101 and F102 CheckInverter Fuse F101 and F102 Check

F101F10112A/65V

F101/F102 (Diode Mode Check)Open (Red Lead on Fuse)

0.48V (Black Lead on Fuse)

Center Left of the BoardJ t i ht f CN101 C tJust right of CN101 Connector

F10212A/65V


Inverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) InformationInverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) Information

12Mhz

Y1Y1

1.35V p/p Top Leg

1.88V p/p Bottom Leg


Inverter LED for Visual Troubleshooting InformationInverter LED for Visual Troubleshooting Information

D16 Blinks once a second (Normal)D75 should be off. If it is on,

it indicates a problem.If either CN102 or CN103 is disconnected D75 will illuminate, the panel will still light,D75 will illuminate, the panel will still light,

but appear dimmer.


LED Drive Signal and Troubleshooting InformationLED Drive Signal and Troubleshooting InformationGlobal Dimming (which affects every LED block at the same time) is accomplished by the P-DIM signal arriving on pin 11 of CN101. As P-DIM voltage goes up, all drive signals will remain low longer. As P-DIM voltage goes down, all drive signals will remain high longer.P-DIM has a range of 0.37V to 3.3V.Local Dimming (which affects individual LED blocks) is also accomplished by these drive signals which are manipulated by the Control Signals entering on CN2.

Drive Signals being delivered to the LED Blocks V1 ~ V16

80 IRE35V p/p 240Hz

5 IRE35V p/p 240Hz

Note: If a particular area is exhibiting a dimmer level than the other or the overall brightness seems dim, be sure to first check the customer’s Menu setting for Backlights. Raise the percentage and see if the overall brightness returns to normal. If not, 1st Check the P-DIM level, it should rise with the percentage shown on screen. 0% = 0.37V to 100% = 3.3V. Follow the P-DIM signal all the way to each Inverter. 2ND Turn off the set and unplug the connector to the Inverter coming from the Main board. If the brightness returns to normal the Main board is defective If not investigate all inverter voltages if OK use the


returns to normal, the Main board is defective. If not, investigate all inverter voltages, if OK, use the grounding of each V block driver procedure to test the panel’s backlight LEDs.

Inverter (Main) CN101 and CN2 Voltage and Diode CheckInverter (Main) CN101 and CN2 Voltage and Diode CheckCN101 "Inverter Main" To P204 "SMPS"

Pi L b l STBY R Diode

CN2 “Inverter Main” to “Main” P7901

Pi L b l STBY R DiodePin Label STBY Run Diode Check

1~5 24V 0V 24.49V 1.33V

6~10 Gnd Gnd Gnd GND

11 N/C N/C N/C Open


1 3.3V_MST 0V 3.31V Open

2 Gnd Gnd Gnd 1Open

3 M2 SCLK 0V 0 05V Open11 N/C N/C N/C Open

12 (2) I-C 0V 3.17V Open

13 (1) P-DIM 0V 0.37V~3.3V Open

14 ERROR n/c n/c Open

3 M2_SCLK 0V 0.05V Open

4 Gnd Gnd Gnd Gnd


6 n/c Gnd Gnd Gnd

(1) PDIM Pin 11 can vary according to incoming video IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor 1Ground on Main

7 n/c Gnd Gnd Gnd

8 R_VS LDIM_Reverse 0V 0.02V Open

) pIC900. Range 0.37V to 3.3V.

(2) Inverter On/Off Control

CN2

Note:The pins on CN2Are inverted from

P7901 on the Main.Pin1

P7901 on the Main.



55LX6500 Main to Inverter Local Dimming Control Signals Waveforms55LX6500 Main to Inverter Local Dimming Control Signals Waveforms


1V per/div 50uSec 3.43V p/p

Main P9701 pin 03Inverter CN2 pin 06

Black or White

1V per/div 100mSec 3.31V p/p

Main P9701 pin 05Inverter CN2 pin 04100 IRE (Full White)



0 IRE (Black)



Tuner Video



Black or White

Inverter (Secondary) CN102 and CN103 Voltage and Diode CheckInverter (Secondary) CN102 and CN103 Voltage and Diode CheckCN102 "Inverter" To "Panel LEDs" White Plug

Pin Label STBY Run Diode

CN103 "Inverter" To "Panel LEDs" Black Plug

Pin Label STBY Run Diode Pin Label STBY Run Check

1 Out_M1 0V 134V Open

2 n/c n/c n/c Open

3 V1 0V *1V~30V Open

Pin Label STBY Run Check


2 n/c 0V Gnd Open





7 / 0V G d O




7 V13 0V *1V 30V O7 n/c 0V Gnd Open


9 V10 0V *1V~30V Open

10 V11 0V *1V~30V Open

7 V13 0V 1V~30V Open

8 V14 0V *1V~30V Open

9 V15 0V *1V~30V Open

10 V16 0V *1V~30V Open

11 V12 0V *1V~30V Open

12 n/c n/c n/c Open


12 n/c n/c n/c Open


*Black to White*Black to White

Note: The voltage taken on any of the V lines (V1~V16) are RMS values. They may vary from meter to meter dependant upon the frequency response. 5% brightness

35V p/p 240Hz

80% brightness

V lines (V1~V16)Black to White


Diode Mode values taken with all Connectors Removed80% brightness35V p/p 240Hz

Q101123

2.84V24.44V

Gnd

D101123

23.58V133.5V23.1V

D111123

23.58V133.5V23.1V

Q141123

2.84V24.44V

Gnd

Q111123

2.84V24.44V

Gnd

Q151123

2.84V24.44V

GndQ102 1

2345

24.44V7.09VGnd1V

2.72

IC1 123

Gnd1.82V7.07V

IC2 123

Gnd3.32V7.07V

Q163 123

2.86V7.07V2.82V

Q164 123

2.86VGnd

2.82V

IC103 12345678

2.72V4.2V

5.94VGnd

1.72V2.72V

0V24.47V

Q201 through Q216BCE

0.73V1~30VGnd

Q7 BEC

1.82VGnd

7.07VE B

C

IC101 123456789

10111213141516

1.72V0.96V1.27V1.26V1.78V1.59V

n/cGnd

24.49V4.43V1/58V1/78V1.26V1.56V

0V2.52V

Q162 BCE

2.85V0V

2.86VEB

C

Q161 BCE

4.34V2.86VGnd

EB

C

Q282 BCE

2.72V0V

GndEB

C

Q283 BCE

2.51V2.52V1.57V

Q281 BCE

0.5V24.49V24.46VEB

C

E B

C

EB

C

EB

C

EB

C

Q121 BCE

4.34V2.86VGnd

Q122 BCE

2.85V0V

2.86V

Q124 123

2.86VGnd

2.82V

Q123 123

2.86V7.07V2.82V

Q284 BCE

2.51V1.58V2.52V

Q285 BCE

0V2.51VGnd

E B

C

Q286 BCE

2.72V0V

GndEB

C

Q287 BCE

0V0.07VGnd

E B

C

B EC

78

55LX6500 Inverter DC Volages55LX6500 Inverter DC Volages


Collector Voltage White to BlackQ201 (Block V1) to Q216 (Block V16)

These transistors ground the 16 LED Blocks

D141123

23.58V133.5V23.1V

D151123

23.58V133.5V23.1V


LCD Panel Controller BoardThe Frame Rate Converter IC IC102 receives from the Main Boards LVDS Video Signals at P802, which is a 51 pin cable. The Video Signal is a 20 Bit (24 pin including clock and data lines) LVDS (Low Voltage Differential Signal) which it processes into TFT Drive Signals. These signals are from IC400 and IC500 to connectors P805 and P806 and then to the LCD TFT Panel.

T-CON/3D B+: 12V is supplied to the T-Con Board from the Main Board P7800 and P7802.Delivered by two connectors P802 and P803 easily measured at the Test Point just to the left of the P803 on L802.

There is a primary DC to DC converter (IC600) that creates several voltages; (8V Measured at pin 11), (25.63V Measured at pin 8), (6V Measured at pin 2), (16V Measured at pin 42), (3.3V Measured at pin 23-24 or L601), (-5V Created by D601 on the back side of the board). Another voltage is generated for the panel by (Q701 8.17V measured at L701).

These Voltages can also be measured at the ribbon connectors delivering signals to the TFT panel using TPs.P805: “16V” pins 1-2, “3.34V” pins 4-5, “8.17V” pins 7-8, “-4.9V” pin 11, “25.63V” pin 16, “6V”pins 18-19, “8V” pin 21, “15.75V” pins 23-24 and “3.33V” pin 45.

P806: 16V pins 79-80, 3.34V pins 76-77, 8.17V pins 73-74, -4.9V pin 71, 25.63V pin 66, 6V pins 63-64, “8V” pin 61, 15.75V pins 44 and “3.33V” pin 36.

Also, See the 11X17 Foldout (Interconnect Diagram) for more details.

TT--CON/3D (TFT DRIVE) with 3D FRAME CONVERTER SECTIONCON/3D (TFT DRIVE) with 3D FRAME CONVERTER SECTION

55LX6500 T-CON/3D Board Components Identified55LX6500 T-CON/3D Board Components Identified


A1

A2 C

P805

IC1000

E

BC E B

C

E

BC

EB

C

P806

IC102

P101X100

25MHz

IC600

1.27V

8.2V

2.52V

2.53V

3.3V

3.4V

1.05V

8V Pin 61

8.2V Pins 73-743.4V Pins 76-77

16V Pins 79-80

-5V Pins 71

25.6V Pins 66

6V Pins 63-64

8.2V Pins 7-83.4V Pins 4-5

8V Pin 21

6V Pins 18-1925.6V Pins 16-5V Pins 11

16V Pins 1-2

13

25

48

P802

P804P803IC502

IC307IC200

IC205IC302L306

1.07V

IC301L3053.34V3.35V

IC304

IC1002 IC1001

IC500 IC400

SW400

IC801

L314

IC308

Q700

L700

IC201

IC204

IC700

Q702L702

1.88V1.85V

IC305

1.2VL309

IC306

L601

EB

C

E

BC

P900

L307

L600IC309

IC501

Q1004Q1003

Q1002Q1001

L701 Q701

Q906Q907

D602

D600

D601-5V (A1)

3.33V

L802

11.42VLVDS 12V

TP

n/c

A1A2C

D60316V

IC310

IC600B+ Source

11.42VLVDS 12VPins 37-38 11.22V

11.27V

2.5V 2.3V

8V Pin 11

25.6V Pin 8

6V Pin 2

16V Pin 42

3.4V L601

3.4V 23-24

8.2V

P803 "T-CON" to P7802 "Main Board"Pin LABEL Run Diode Check1 PANEL_VCC 11.58V Open2 PANEL_VCC 11.58V Open3 Gnd Gnd Gnd4 Gnd Gnd Gnd

P804 "T-CON" to P7803 "Main Board"Pin LABEL Run Diode Check1 Gnd Gnd Gnd2 E_TCK 0.05V Open3 E_TDO 3.31V Open4 E_TMS 3.31V Open5 E_TDI 3.31V Open6 Gnd Gnd Gnd

P802 "T-CON" to P7800 "MAIN Board"Pin Label Run Diode Check1 Gnd Gnd Gnd2 3D_Sync_Out 0.03V 2.34V3 V_SYNC 3.33V 1V4 SDA3_3.3V 3.34V 1.73V5 SCL3_3.3V 3.34V 1.73V6 FRC_RESET 3.32V Open7 n/c n/c n/c8 3DTV 0V Open9 3D_DIM 0V Open10 3D_DIM_2 0.05V Open11 n/c n/c n/c12 RRXA0- 1.17V 1.67V13 RRXA0+ 1.19V 1.67V14 RRXA1- 1.19V 1.67V15 RRXA1+ 1.17V 1.67V16 RRXA2- 1.22V 1.67V17 RRXA2+ 1.14V 1.67V18 Gnd Gnd Gnd19 RRXACK- 1.16V 1.67V20 RRXACK+ 1.20V 1.67V21 Gnd Gnd Gnd22 RRXA3- 1.20V 1.67V23 RRXA3+ 1.14V 1.67V24 RRXA4- 1.26V 1.67V25 RRXA4+ 1.08V 1.67V26 Gnd Gnd Gnd27 n/c n/c n/c28 RRXB0- 1.19V 1.67V29 RRXB0+ 1.19V 1.67V30 RRXB1- 1.19V 1.67V31 RRXB1+ 1.16V 1.67V32 RRXB2- 1.2V 1.67V33 RRXB2+ 1.14V 1.67V34 Gnd Gnd Gnd35 RRXBCK- 1.16V 1.67V36 RRXBCK+ 1.2V 1.67V37 Gnd Gnd Gnd38 RRXB3- 1.22V 1.67V39 RRXB3+ 1.14V 1.67V40 RRXB4- 1.26V 1.67V41 RRXB4+ 1.09V 1.67V

42-46 Gnd Gnd Gnd47 n/c n/c n/c

48-51 PANEL_VCC 11.59V Open


TT--CON/3D (TFT Drive) Board ChecksCON/3D (TFT Drive) Board Checks

T-CON/3D Board (Locations)

Check for 12VVoltage supplied from P803 Pins 1-2

and/or P802 pins 49-51.

P804

Check pins 1 or 2

(12V)

P803

Check pins 49~51(12V)

P802

55LX6500 T-CON Voltage Development Block Diagram55LX6500 T-CON Voltage Development Block Diagram


P802 L801

P803 L802

VLCD_POWER (+12V / 3A)L301

IC301MP8706EN

3A

L307IC302

SC414MLTRT3A

Q700FET

+3.3V

+1.0VDC

+3.3V_TCON

+1.8V_TCON

HVDD_R(+8.2V)

Pin 8: VCC_LCM (+3.3V)

Pin 42: VDD_LCM (+16V)

Pin 8: VGH (+27V)

VGL (-5V)

Q702FET

Q701FET

IC700MAX15023

IC701MAX15206

P805

P806

LCDModule

IC600TPS65162

D60114

23-24

L307

L701

L702

L700

L306

L305

R6018

42

L600

TT--CON/3D (TFT Drive) Panel Voltage CON/3D (TFT Drive) Panel Voltage Development ChecksDevelopment ChecksThe development for the voltages for P805 and P806 connectors to the panel are shown here.This is an excerpt from the Interconnect diagram. Panel voltages are outlined in the rounded cornered boxes.


TT--CON/3D (TFT Drive) CON/3D (TFT Drive) Panel Voltage ChecksPanel Voltage Checks

See the previous page for the development for the voltages for P806 and P805 connectors which are Panel voltages.


TT--CON/3D Control Board X100 Crystal ChecksCON/3D Control Board X100 Crystal Checks

X1001 71V DC 1 65V DC

25Mhz

1.71V DC 1.65V DC

Runs when set is On4.8V p/p 3.25V p/p

T-CON/3D Board


86

55LX6500 T-CON Component Voltages55LX6500 T-CON Component VoltagesIC301 1) 11.41V

2) 3.35V3) 3.35V4) 8.77V5) 3.11V6) 0.81V7) 5.02V8) Gnd

IC302 1) 0.8V2) Gnd3) 3.33V4) 4.26V5) 3.3V6) 1.08V7) 1.08V8) 3.0V

+3.3VReg

+1.0VVDCReg

IC304 1) 0.75V2) 5.0V3) Gnd4) 0V5) 2.5V6) 5.0V7) 7.55V8) 11.36V9) 11.36V10) 11.36V11) 11.36V12) 2.55V13) Gnd14) Gnd15) 2.55V16) Gnd17) Gnd18) Gnd19) Gnd20) 2.5V21) 2.5V22) n/c23) 0V24) 2.5V25) n/c26) Gnd27) 1.13V28) 10.99V

IC305 1) 0.8V2) Gnd3) 3.32V4) 4.32V5) 3.3V6) 1.22V7) 1.22V8) 2.98V

+2.5VVQReg

1V2Reg

IC310

IC306

IC309

IC308

1) n/c2) 2.5V3) 2.51V4) n/c5) n/c6) 1.81V7) 0.81V8) Gnd

IC307 1) n/c2) 2.49V3) 2.51V4) n/c5) n/c6) 1.81V7) 0.81V8) Gnd

1) n/c2) 2.47V3) 2.49V4) n/c5) n/c6) 1.8V7) 0.8V8) Gnd

1) Gnd2) 3.26V3) 0.89V4) 0.9V5) 1.8V6) 3.34V7) 1.8V8) 0.9V

1) 11.41V2) 2.53V3) 2.53V4) 7.97V5) 3.11V6) 0.8V7) 5.07V8) Gnd

+1.8VDDRReg

1V2Reg

DDRVTTReg

2V5Reg

+1.8VDDRSReg

IC700

IC600

1) 5.96V2) 6.03V3) 3.15V4) 0.17V5) 2.72V6) 3.3V7) 0V8) 25.6V9) 24.7V10) 1.26V11) Gnd12) 5.54V13) 0V14) 0V15) Gnd16) 0V17) 1.26V18) 4.24V19) Gnd20) Gnd21) 1.27V22) 11.45V23) 3.4V24) 3.4V

25) 11.38V26) 11.38V27) 11.07V28) 0V29) 4.24V30) 1.9V31) 0.59V32) 3.3V33) 3.13V34) 0V35) 0V36) 0V37) 11.42V38) 11.42V39) n/c40) n/c41) 1.27V42) 16V43) 5.96V44) 5.96V45) 5.96V46) 5.96V47) Gnd48) 5.97V

1) 0.59V2) 3.3V3) 3.3V4) 0V5) 4.26V6) Gnd7) 1.8V8) 7V9) 2.7V10) 4.78V11) 8.47V12) 3.33V

13) Gnd14) 3.6V15) 0.12V16) 5.21V17) 0.6V18) 1.13V19) 1.18V20) Gnd21) 11.4V22) 0.56V23) 0.81V24) 0.9V

DC-DCConv

For +3.3VTCON

DC-DCConv

IC801 1) 8.01V2) 15.7V3) 15.7V4) 14.05V5) 13.35V6) 12.27V7) 11.07V8) Gnd9) 16.02V10) 10.28V11) 8.31V12) 7.72V13) 3.33V14) 3.33V15) 3.33V16) Gnd17) 0V18) Gnd19) 4.94V20) 3.75V21) 2.67V22) 16.02V23) 0V24) Gnd25) 0.27V26) 0.27V27) 0.25V28) 5.96V

DataBuffer

E B

C

Q1001

E

BC

Q1004

Q803EB

C

Q804EB

C

ECB

Q906

B) 2.52VE) 2.52VC) 2.27V

B) 2.52VE) 2.52VC) 2.27V

B) 0.61VE) GndC) 0.03V

B) 0.0VE) GndC) 1.9V

B) 0VE) GndC) 1.97V

B) 0.02VE) GndC) 3.33V

Q907EB

C

Q702

Q700

Q701

1) Gnd2) 3.26V3) 3.33V4) 4.79V5) 11.42V6) 11.42V7) 3.34V8) 3.34V

1) Gnd2) 1.42V3) 8.16V4) 11.7V5) 11.42V6) 11.42V7) 8.2V8) 8.2V

1) Gnd2) 4.27V3) 1.89V4) 2.72V5) 11.42V6) 11.42V7) 0V8) 1.89V

A2A1

C

D600 A1) 16VA2) 25.6VC) 20.68V

+8.2VHVDDReg

+3.3VTCONReg

+1.8VTCONReg


A1) -3.0VA2) GndC) 0V

D602 C) 3.34VA) Gnd

IC501 1) Gnd2) Gnd3) Gnd4) Gnd5) 3.3V6) 3.3V7) 0V8) 3.3V

EEPROMIC500

IC502 1) 3.34V2) 3.34V3) 3.3V4) 3.35) 0V6) 3.3V7) 3.3V8) Gnd

DATAExtenter

9) 0V10) 0V11) 0V12) 0V13) 3.3V14) 3.3V15) 0V16) 3.3V

C

A

D601

D603 C) 16.11VA) 11.21V

C A

Pin Label Run Diode Check Pin Label Run Diode

Check

TT--CON/3D Board LVDS P802 to Main Board P7800 Voltage and Diode CheckCON/3D Board LVDS P802 to Main Board P7800 Voltage and Diode CheckP802 LVDS Connector "T-CON/3D Board“ to P7800 "Main"

1 Gnd Gnd Gnd 24 RRXA4- 1.26V 1.67V

2 3D_Sync_Out 0.03V 2.34V 25 RRXA4+ 1.08V 1.67V

3 *V_SYNC 3.33V 1V 26 Gnd Gnd Gnd

4 SDA3_3.3V 3.34V 1.73V 27 n/c n/c n/c

P802

5 SCL3_3.3V 3.34V 1.73V 28 RRXB0- 1.19V 1.67V

6 FRC_RESET 3.32V Open 29 RRXB0+ 1.19V 1.67V

7 n/c n/c n/c 30 RRXB1- 1.19V 1.67V

8 3DTV 0V Open 31 RRXB1+ 1.16V 1.67V T-CON/3D 19 3D_DIM 0V Open 32 RRXB2- 1.2V 1.67V

10 3D_DIM_2 0.05V Open 33 RRXB2+ 1.14V 1.67V

11 n/c n/c n/c 34 Gnd Gnd Gnd

12 RRXA0- 1.17V 1.67V 35 RRXBCK- 1.16V 1.67V

13 RRXA0+ 1 19V 1 67V 36 RRXBCK+ 1 2V 1 67V

Text in Blue are LVDS video signals.

12V

13 RRXA0+ 1.19V 1.67V 36 RRXBCK+ 1.2V 1.67V

14 RRXA1- 1.19V 1.67V 37 Gnd Gnd Gnd

15 RRXA1+ 1.17V 1.67V 38 RRXB3- 1.22V 1.67V

16 RRXA2- 1.22V 1.67V 39 RRXB3+ 1.14V 1.67V

17 RRXA2+ 1.14V 1.67V 40 RRXB4- 1.26V 1.67V

*Pin 25.5V p/p 60 Hz

3D-Sync

18 Gnd Gnd Gnd 41 RRXB4+ 1.09V 1.67V

19 RRXACK- 1.16V 1.67V 42-46 Gnd Gnd Gnd

20 RRXACK+ 1.20V 1.67V 47 n/c n/c n/c

21 Gnd Gnd Gnd 48-51 PANEL_VCC 11.58V Open T-CON/3D B+

*Pin 2 Only active when a 3D source is played. (1.63V)


22 RRXA3- 1.20V 1.67V

23 RRXA3+ 1.14V 1.67VDiode Check taken with meter in Diode Mode with all Connectors Removed

TT--CON/3D Board P803 and P804 to Main Board Voltage and Diode CheckCON/3D Board P803 and P804 to Main Board Voltage and Diode Check

P803 Connector "T-CON/3D Board“ to P7802 "Main" T-CON/3DPin LABEL Run Diode Check1 PANEL_VCC 11.58V Open

2 PANEL_VCC 11.58V Open

12V TP

13 Gnd Gnd Gnd

4 Gnd Gnd Gnd

P804 Connector "T-CON/3D Board“ to P7803 "Main"P804

Pin LABEL Run Diode Check1 Gnd Gnd Gnd

2 E_TCK 0V Open

3 E_TDO 3.33V Open

4 E TMS 0 35V O4 E_TMS 0.35V Open

5 E_TDI 3.32V Open

6 Gnd Gnd Gnd

1

Location for P803 and P804Top Left of board


Diode Check taken with meter in Diode Mode with all Connectors Removed

TT--CON/3D Board P805 to the Panel VoltagesCON/3D Board P805 to the Panel Voltages1 VDD (16V) 16V 28 V6 11.08V 54 RLMVCLKP 1.19V

2 VDD (16V) 16V 29 V7 10.28V 55 RLMVCLKN 1.18V

3 Gnd Gnd 30 V9 8 31V 56 Gnd Gnd3 Gnd Gnd 30 V9 8.31V 56 Gnd Gnd

4 VCC (3.3V) 3.4V 31 V10 7.71V 57 RLMV4P 1.15V

5 VCC (3.3V) 3.4V 32 V12 3.37V 58 RLMV4N 1.24V

6 Gnd Gnd 33 V13 4.94V 59 RLMV5P 1.34V

7 HVDD (8V) 8.2V 34 V14 3.75V 60 RLMV5N 1.22V

8 HVDD (8V) 8.2V 35 V15 2.68V 61 RLMV6P 1.12V

9 Gnd Gnd 36 V16 1.97V 62 RLMV6N 1.23V

10 OPT_P n/c 37 V17 0.27V 63 Gnd Gnd

11 VGL (-5V) (-5V) 38 V18 0.26V 64 RRMV0P 1.13V

12 Gnd Gnd 39 Gnd Gnd 65 RRMV0N 1.23V12 Gnd Gnd 39 Gnd Gnd 65 RRMV0N 1.23V

13 GOE 0.83V 40 GSP 0V 66 RRMV1P 1.15V

14 GSC 2.3V 41 POL 1.66V 67 RRMV1N 1.23V

15 Gnd Gnd 42 Gnd Gnd 68 RRMV2P 1.15V

16 VGH (26V) 25.6V 43 SOE_R 0.25V 69 RRMV2N 1.23V

17 Gnd Gnd 44 H_CONV 0.44V 70 Gnd Gnd

18 VCOMRFB 6V 45 OPT_N 3.33V 71 RRMVCLKP 1.19V

19 VCOM ROUT 6V 46 Gnd Gnd 72 RRMVCLKN 1.18V

20 Gnd Gnd 47 RLMVOP 0.15V 73 Gnd Gnd

21 Z_OUT 8V 48 RLMVON 0.17V 74 RRMV4P 1.13V

22 Gnd Gnd 49 RLMV1P 0.14V 75 RRMV4N 1.24V

23 V1 15.75V 50 RLMV1N 1.24V 76 RRMV5P 1.11V

24 V2 15.75V 51 RLMV2P 1.13V 77 RRMV5N 1.12V

25 V3 14V 52 RLMV2N 1.22V 78 RRMV6P 1.12V

26 V4 13 35V 53 G d G d 79 RRMV6N 1 22V


26 V4 13.35V 53 Gnd Gnd 79 RRMV6N 1.22V

27 V5 12.27V 80 Gnd Gnd

TT--CON/3D Board P806 to the Panel VoltagesCON/3D Board P806 to the Panel Voltages1 Gnd Gnd 28 Gnd Gnd 54 V14 3.75V

2 LLMV0P 1.19V 29 LRMV4P 1.15V 55 V15 2.68V

3 LLMV0N 1 24V 30 LRMV4N 1 25V 56 V16 0 27V3 LLMV0N 1.24V 30 LRMV4N 1.25V 56 V16 0.27V

4 LLMV1P 1.18V 31 LRMV5P 1.18V 57 V17 0.26V

5 LLMV1N 1.3V 32 LRMV5N 1.26V 58 V18 0.26V

6 LLMV2P 1.15V 33 LRMV6P 1.17V 59 Gnd Gnd

7 LLMV2N 1.29V 34 LRMV6N 1.25V 60 Gnd Gnd

8 Gnd Gnd 35 Gnd Gnd 61 Z_OUT 8V

9 LLMVCLKP 1.22V 36 OPT_N 3.33V 62 Gnd Gnd

10 LLMVCLKN 1.23V 37 H_CONV Gnd 63 VCOMLOUT 6V

11 Gnd Gnd 38 GSP 0V 64 VCOMLFB 6V

12 LLMV4P 1.18V 39 POL 1.66V 65 Gnd Gnd12 LLMV4P 1.18V 39 POL 1.66V 65 Gnd Gnd

13 LLMV4N 1.26V 40 Gnd Gnd 66 VGH (26V) 25.6V

14 LLMV5P 1.26V 41 SOE_L 0.24V 67 Gnd Gnd

15 LLMV5N 1.27V 42 Gnd Gnd 68 GSC 2.3V

16 LLMV6P 1.16V 43 V1 15.75V 69 GOE 0.83V

17 LLMV6N 1.26V 44 V2 15.75V 70 Gnd Gnd

18 Gnd Gnd 45 V3 14V 71 VGL (-5V) (-5V)

19 LRMV0P 1.17V 46 V4 12.26V 72 Gnd Gnd

20 LRMV0N 1.28V 47 V5 11.07V 73 HVDD (8V) 8.2V

21 LRMV1P 1.15V 48 V6 11.07V 74 HVDD (8V) 8.2V

22 LRMV1N 1.26V 49 V7 10.27V 75 Gnd Gnd

23 LRMV2P 1.17V 50 V9 8.31V 76 VCC (3.3V) 3.4V

24 LRMV2N 1.27V 51 V10 5.74V 77 VCC (3.3V) 3.4V

25 Gnd Gnd 52 V12 Gnd 78 Gnd Gnd

26 LRMVCLKN 1 21V 53 V13 4 94V 79 VDD (16V) 16V


26 LRMVCLKN 1.21V 53 V13 4.94V 79 VDD (16V) 16V

27 LRMVCLKP 1.23V 80 VDD (16V) 16V

MAIN BOARD SECTIONMAIN BOARD SECTIONThe Main board receives its operational B+ from the Power Supply via P8000. There are a single LVDS cable that feeds the Video to the T-CON/3D (TFT Driver) board that drives the Panel. The LVDS cable carries the 20 bit LVDS Video and the TruMotion (Motion Estimated Motion Compensated) video. The Main board also includes the Tuner, Audio and Audio/Video inputs and selection circuits.

Input Voltages from SMPS.STAND-BY

• STBY 3.5V (P8000 pins 9~12)

The Main board also develops several B+ sources on the board.

RUN • 12V pins 13, 19 and 21. • 24V pins 2-4.

LVDS• Panel VCC (12V Not generated but switched

STAND-BY VOLTAGES• 3.3V_ST (Voltage direct from SMPS)

GENERAL• 5V_Normal• 5V USB

Panel_VCC (12V Not generated, but switchedfrom the 12V arriving from the SMPS. AUDIO (IC8801)

• 1.8V• 3.3V

BCM IC900 Vid P

TUNER and VSB CIRCUIT (Made from the 12V) • 5V_Normal which is used to make 5V TU • 5V TU BCM IC900 Video Processors

• 1.2VIC9701 Tru-Motion and Local Dimming IC.

• 1.26V_MEMC, 1.5V_MEMC,D1.5V, D1.8V, and 3.3V

5V_TU • 3.3V_TU• 1.26V_TU

WIRELESS VOLTAGES• 24V (Switched from 24V from SMPS)


, ,( )

Main Board LayoutMain Board Layout To T-CON/3D

P7800To T-CON/3D

P7803P7802

To T CON/3D

Video Processor IC900 and

Di i IC9701

P7901To Inverter

P8000To SMPS To 3D Emitter

To T-CON/3D

P2401IC9701

P2300Dimming IC9701

runs Hot. This is normal.P8200 To Front IR

See next page for component P1000

n/c

n/c

Component or

P8100n/c

identification n/cIC900Video

Processor

Component or Composite

These connectors are Mini plug typeLAN

Wi l M di B HeadphoneWireless Media Box Remote

Headphone


P8800 To Speakers


55LX6500 Main Layout55LX6500 Main Layout

93

E

C

B A1

C

A2

Q D

Q?LAN

1 2

3

SG

D

MAIN BOARDp/n: EBR69488901

IC900Video Processor

LGE3549XQ

P7800

IC601

X9700

P8200

Q8201Q8200

X8101

X8100

IC8101

P8100 IC8004

IC8800

Q8800

n/c

IC8801

Q8700

P8800

Q308

HDMI

IC300

IC700

USB2

USB1

IC302

X1001

IC901

IC8000

IC301IC605

Q8004

Q8003 Q8001IC8002 IC8001

IC8003IC8007

IC8008IC9702

IC603

P7901 P7802P8000

P7803

P2401

25MHz

32.768KHz

10MHz

SW8100

Micro Reset

IC9703Q8005

IC8005

RS232RGB

Audio Amp

HDMISelector

Microprocessor

54MHz

Panel Vcc Sw

IC9701LG5111

INV_CTL Sw

1.8V Dimming

EEPROM

NVRAM

LVDS & Dimming

DDR DDR DDR

NAND Flash Memory

USB1 5V

USB2 5V

+ 5V Normal Reg

A1.2V Reg

D1.8V Reg

D3.3V Reg

+1.26V_TU Reg

Earphone Amp

LVDS

To SMPS

A2.5V Reg

To T-CONTo T-CON

3D Sync

USB 5V

Spk

Ft IR

+1.8V_AMP

IC8300

Wireless Media Box Remote

JK8700

HDMI

To InverterLocal Dimming

Q8307

123

Main Board Used:

EBR69488901 55LX6500-UB_AUSWLJRBU60987802 55LX6500-UB_AUSWLUR

18. IF p17. IF n16. IF AGC15. Reset14. 3.3V13. 1.26V12. GND11. CVBS10. NC 9. SIF

8. NC 7. SDA 6. SCL 5. NC 4. NC 3. 5V

2. NC 1. NC

Digital Video

Analog Video

Tuner B+

Tuner DataTuner Clock

Audio

TU700TDVJ-H031F

P2300

HP

SideAV

P1000n/c

n/c

PCAudio

HDMI

HDMI

OpticalAudio

55LX6500 Main (Front Side) Component Voltages

IC300 Earphone Amp IC601 NVRAM IC8002 D1.8V IC8005 (+3.3V_NORMAL) IC9703 EEPROMPin Pin Pin Regulator Pin And D3.3V Regulator Pin for LG5111[1] 0V [1] n/c [1] 5V [1] Gnd [1] Gnd[2] 0V [2] 0V [2] 3.35V (B+) [2] 11.74V (B+) [2] 3.34V[3] 0V [3] 3.34V [3] 1.83V (Out) [3] Gnd [3] Gnd[4] 0V [4] Gnd [4] Gnd [4] 0.81V [4] Gnd[5] 0V (HP R Out) [5] 3.34V [5] Gnd [5] 0.89V [5] 3.34V[6] 3.3V [6] 0V [6] 2.36V [6] 3.34V (PWR On/Off2 Ctl) [6] 3.34V[7] 3.3V [7] Gnd [7] 0.91V [7] 3.36V (Out) [7] 3.32V

[8] (-1.8V) [8] 3.34V (B+) [8] 1.05V [8] 3.36V (Out) [8] 3.34V (B+)[9] (-0.88V) [9] 2.4V

[10] Gnd IC700 (+1.26V_TU) [10] 3.37V (PWR On/Off1 Ctl) IC8007 Power Det Gen Q308 Headphone[11] 0.94V Pin Regulator Pin (+12V and +3.5V) Pin Mute[12] 1.83V [1] 0V (Gnd) IC8003 (+5V_NORMAL) [1] Gnd B 0V[13] 3.32V (Mute) [2] 1.27V (Out) Pin Regulator [2] 3.6V (B+ C 3.32V[14] 3.32V (B+) [3] 3.32V (B+) [1] Gnd [3] 3.5V (Out) E Gnd[15] Gnd [2] 11.74V (B+)[16] 0V (HP L Out) IC8000 5V Regulator [3] Gnd IC8008 Power Det Gen Q8001 PANEL_VCC

Pin for USB [4] 0.81V Pin (+24V) Pin Control 1st DriverIC301 USB 2 [1] 11.75V (B+) [5] 0.86V [1] Gnd B 0V

Pin 5V [2] 5.1V (Out) [6] 3.34V (PWR On/Off2 Ctl) [2] 3.64V (B+) C 0.68V[1] Gnd [3] 5.1V (Out) [7] 5.17V (In) [3] 3.76V (Out) E Gnd[2] 5.1V (In) [4] 10.5V [8] 5.17V (In)[3] 5.1V [5] 3.3V IC8800 (+1.8V_AMP) Q8003 PANEL_VCC[4] 3.33V [6] 0.81V IC8004 A2.5V Regulator Pin Regulator Pin Control 2nd Driver[5] 3.33V [7] 5.06V Pin for USB [1] Gnd B 0.66V[6] 5.1V (Out) [8] 0V (Gnd) [1] n/c [2] 1.8V (Out) C 0V[7] 5.1V (Out) [2] 3.26V (B+) [3] 3.3V (B+) E Gnd

[8] n/c IC8001 D1.2V and A1.2V [3] 3.26V (B+)Pin Regulator [4] n/c IC9702 (+1.8V_L/Dimming) Q8004 PANEL_VCC

IC302 USB 1 [1] 0V (Gnd) [5] n/c Pin Regulator Pin SwitchPin 5V [2] 3.3V [6] 2.57V (Out) [1] Gnd S 11.62V (In)[1] Gnd [3] 0V (Gnd) [7] 0.83V [2] 11.74V (B+) G 1.8V (Enable)[2] 5.1V (In) [4] 1.27V [8] Gnd [3] Gnd D 11.8V (Out)[3] 5.1V [5] 3.32V [4] 0.81V (FB)[4] 3.33V [6] n/c Q8200 IR Buffer [5] 0.77V Q8800 AMP Mute to[5] 3.33V [7] 4.48V Pin 2nd [6] 3.34V AMP_MUTE1 IC8801[6] 5.1V (Out) [8] 3.32V B 0.56V [7] 3.32V (Out) B 0V[7] 5.1V (Out) [9] 3.32V C 0V [8] 3.34V (Out) C 3.34V

[8] n/c [10] 3.34V E Gnd E Gnd[11] 1.28V Q8700 Wireless PWR[12] Gnd Q8201 IR Buffer Dongle In Turns on Q8701[13] 3.3V Pin 1st B 0.66V (0.0V w/Dongle In)[14] 0.82V B 0V C 0.14V (24V w/Dongle In)

C 3.36V E GndQ8005 INV_ON Q8307 Side HDMI E Gnd Dongle Out

Pin Driver Pin Hot Swap B 0V (0.0V w/Dongle Out)B 0V (INV ON) En B 0V C 24.6V (24V w/Dongle Out)C 2.97V (Out) C 4.32V E GndE Gnd E Gnd

B CE



55LX6500 Main (Back Side) Layout55LX6500 Main (Back Side) Layout

95

EC

B A1

C

A2

Q D


Q8205Q8203

D8312

Q8308

SB

DG

IC8100

Q200S

GD

Q8301

Q8304

D8307

IC8400

Q8303Q8300

D8309

Q8305Q8302

D8306

Q8701 IC8700IC8401

IC8200

Q702

D8310

Q8306 Q701

IC602IC606

Q901

IC604

Q8000Q8002Power On

Sw

DDRDDR

DDR_VTT Reg

RS232 Buffer

EDID RGB

EEPROM for Micro

HDMI CEC

CEC Pull-Up

Wireless IR_PASS

FLASH_WP for IC901

Power OnDriver

3 12

RGB Sync

Wireless Power FET Switch

Wireless Buffer

Video Buffer

Audio Buffer

+1.8V_HDMI Switch

HDMIHot Swap

HDMIHot Swap

HDMIHot Swap


8. NC 7. SDA 6. SCL 5. NC 4. NC 3. 5V

2. NC 1. NC

Digital Video

Analog Video

Tuner B+


Audio

TU700TDVJ-H031F

Q8100

EDIDWP

HDMIHot Swap

Rubber

55LX6500 Main (Back Side) Component Voltages

IC602 D1.8V IC8400 RGB IC8700 Wireless Q200 (1.8V_HDMI) Q8203 IR Wireless PassPin Regulator Pin H/V Sync Pin Buffer Pin Switch Pin 2nd Driver[1] 0V (Gnd) [1] 1.9V [1] 0V (3.3V Dongle In) S 1.83V (Out) B 0V[2] 3.29V (PWR On/Off1 Ctl) [2] 1.9V [2] 3.3V (0.3V Dongle In) G 3.35V (PWR On/Off2 Ctl) C 3.3V[3] 0.9V (DDR_VTT) [3] 4.4V [3] n/c D 1.83V (In) E Gnd[4] 0.93V [4] 0V [4] n/c[5] 1.83V [5] 0.9V [5] n/c Q701 Tuner SIF[6] 3.38V (In) [6] n/c (4.5V) [6] Gnd Pin (Sound) Buffer Q8205 IR Wireless Pass[7] 1.8V (Out) [7] 0V (Gnd) [7] Gnd B 0.16V Pin 1st Driver[8] 0.91V (DDR_VTT) [8] n/c (4.5V) [8] Gnd C Gnd B 0.6V

[9] n/c (1.9V) [9] n/c E 0.83V C 0VIC8100 EEPROM [10] n/c (1.9V) [10] 0.02V E Gnd

Pin Micro [11] n/c (4.5V) [11] 0V Q702 Tuner Video[1] 0V (Gnd) [12] 0.9V [12] 3.3V Pin (Analog) Buffer Q8300,1,2,6 HDMI 1[2] 0V (Gnd) [13] 0.9V [13] 0V (3.3V Dongle In) B 2.05V Pin Hot Swap[3] 0V (Gnd) [14] 5V [14] 3.3V C 2.75V B 4.2V[4] 0V (Gnd) [15] 3.3V E Gnd C 0V[5] 3.37V IC8401 EDID Data [16] 3.3V E Gnd[6] 3.37V Pin PC Q901 FLASH_WP[7] 0V (Gnd) [1] 0V (Gnd) Pin for IC901 Q8303,4,5,7 HDMI[8] 3.37V [2] 0V (Gnd) B 0V (Flash_WP) Pin Hot Swap

[3] 0V (Gnd) C 3.36V B 0VIC8200 RS232 [4] 0V (Gnd) E Gnd C 4.2V

Pin Routing [5] 0.7V E Gnd[1] 0V [6] 4.1V Q8000 RL_ON (PWR_On)[2] 0V [7] 4.5V Pin 1st Driver Q8308 CEC Remote[3] 0V [8] 4.5V (In) B 0.66V Pin HDMI CEC[4] 0V C 0V [B] 2.72V[5] 0V E Gnd [G] 2.73V[6] (-5.47V) [S] 3.27V[7] n/c (5.59V) Q8002 PWR_ON [D] 3.37V

[8] n/c (0V) Pin Switch[9] n/c (3.3V) [1] 3.36V (In) Q8701 IR Wireless Pass

[10] n/c (0.2V) [2] 0V Pin 2nd Driver[11] n/c (3.3V) [3] 3.3V (Out) G 24.5V (2.3V Dongle In)[12] 3.35V S 24V[13] 0V D 0V (24.5V Dongle In)[14] (-5.47V)[15] 0V (Gnd) D8306,7,9,10 5V Pull Up Routing D8312 3.5V Pull Up[16] 3.37V Pin HDMI SCL/SDA Pin HDMI CEC

A1 5.04V A1 0VC 4.58V C 3.26V

A2 0V A2 3.2V


Main Board X9700 and X1001 Crystal ChecksMain Board X9700 and X1001 Crystal Checks

X9700IC9701 TruMotion / Di i C t l

Runs when set is On

1.6V IC1001 BCM Overtone

X1001 (54Mhz)746mV p/p

Dimming Crystal

1 6V

3.55V p/p

p p

Either leg

Do not measure with Digital Volt meter

25Mhz

1.6V4.5V p/p

725mV p/p

Digital Volt meter

Runs when set is On

MAIN Board

set is On


Main Board X8100 and X8101 Crystal ChecksMain Board X8100 and X8101 Crystal Checks

IC8100 Micro Crystal

X81003.48V p/pEither leg

Top leg

MAIN Board

2.46V p/p Bottom leg

Runs all the time

32.768KHz

X8101

1.47VCan not read

A Waveform onleft side 1.8V

3V p/p


Runs all the time

Main Board Connector P8000 to Power Supply Voltage and Diode CheckMain Board Connector P8000 to Power Supply Voltage and Diode Check

P8000 “Main Board" to P201 “SMPS"P8000Pin Label STBY Run Diode Check1 PWR-ON 0V 3.281V Open

2-4 24V 0V 24.57V Open

Odd Pins Front Row5-8 Gnd Gnd Gnd Gnd

9-12 3.5V 3.44V 3.37V 1.11V

13-15 Gnd Gnd Gnd Gnd

16 / / / O16 n/c n/c n/c Open

17 12V 0V 11.81V Open

18 INV-ON 0V 3.17V 1.61V

19 12V 0V 11 81V Open(1) PDIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setting and Intelligent Sensor

19 12V 0V 11.81V Open

20 n/c n/c n/c Open

21 12V 0V 11.81V Open

22 1P-DIM 0V 0.37V~3.3V Open(room light condition). Range 0.37V to 3.3V.

p

23 n/c n/c n/c Open

24 ERROR 0V 0V Open



Main Board Connector P7800 to TMain Board Connector P7800 to T--CON/3D P802 Voltage and Diode CheckCON/3D P802 Voltage and Diode CheckThere are no Stand-By Voltages for the ConnectorDiode Mode values taken with all Connectors RemovedP7800 Connector “Main" to “T-CON/3D“ P802

Pin Label Run Diode Check Pin Label Run Diode Check Pin Label Run Diode Check

1 PANEL_VCC 11.59V Open 18 Gnd Gnd Gnd 35 RRXA2+ 1.14V 0.97V

2 PANEL_VCC 11.59V Open 19 RRXB2+ 1.14V 0.97V 36 RRXA2- 1.22V 1.15V

3 PANEL_VCC 11.59V Open 20 RRXB2- 1.2V 1.15V 37 RRXA1+ 1.17V 0.97V

4 PANEL_VCC 11.59V Open 21 RRXB1+ 1.16V 0.97V 38 RRXA1- 1.19V 1.15V

5 n/c n/c n/c 22 RRXB1- 1.19V 1.15V 39 RRXA0+ 1.19V 0.97V

6 Gnd Gnd Gnd 23 RRXB0+ 1.19V 0.97V 40 RRXA0- 1.17V 1.15V

7 Gnd Gnd Gnd 24 RRXB0- 1.19V 1.15V 41 n/c n/c n/c

8 Gnd Gnd Gnd 25 n/c n/c n/c 42 3D_DIM_2 0.05V 1.03V

9 Gnd Gnd Gnd 26 Gnd Gnd Gnd 43 3D_DIM 0V 1.03V

10 Gnd Gnd Gnd 27 RRXA4+ 1.08V 0.97V 44 3DTV 0V Open

11 RRXB4+ 1 09V 0 97V 28 RRXA4- 1 26V 1 15V 45 n/c n/c n/c11 RRXB4+ 1.09V 0.97V 28 RRXA4 1.26V 1.15V 45 n/c n/c n/c

12 RRXB4- 1.26V 1.15V 29 RRXA3+ 1.14V 0.97V 46 FRC_RESET 3.32V Open

13 RRXB3+ 1.14V 0.97V 30 RRXA3- 1.2V 1.15V 47 SCL3_3.3V 3.34V 1.04V

14 RRXB3- 1.22V 1.15V 31 Gnd Gnd Gnd 48 SDA3_3.3V 3.34V 1.04V

15 G d G d G d 32 RRXACK 1 2V 0 97V 49 V SYNC 3 33V 0 998V15 Gnd Gnd Gnd 32 RRXACK+ 1.2V 0.97V 49 V_SYNC 3.33V 0.998V

16 RRXBCK+ 1.2V 0.97V 33 RRXACK- 1.16V 1.15V 50 *3D_Sync_Out 0.03V Open

17 RRXBCK- 1.16V 1.15V 34 Gnd Gnd Gnd 51 Gnd Gnd Gnd

5 5V / 60 H*Pi 50 O l ti h 3D


5.5V p/p 60 Hz3D-Sync

*Pin 50 Only active when a 3D source is played. (1.63V)

Main Board P8200 to (Ft. IR/Intelligent Sensor) Voltage and Diode CheckMain Board P8200 to (Ft. IR/Intelligent Sensor) Voltage and Diode Check

P8200 Connector "MAIN Board" To J1 "IR Board" P8200Pin Label STBY Run Diode Check

1 1SCL 3.44V 3.33V Open

2 1SDA 3.44V 3.33V Open

3 Gnd Gnd Gnd Gnd3 Gnd Gnd Gnd Gnd

4 KEY 1 3.29V 3.29V 1.86V

5 KEY 2 3.28V 2.27V 1.85V

6 3.5V_ST 3.44V 3.34V 1.11V

1

7 Gnd Gnd Gnd Gnd

8 LED_LOGO 0V 0.82V Open

9 2IR 3.44V 1.48V Open

10 Gnd Gnd Gnd Gnd 1

(1) Clock pulses only present when Intelligent Sensor is turned on. (3.7V p/p)

10 Gnd Gnd Gnd Gnd

11 +3.3V_Normal 0V 3.32V 0.50V

12 LED_R/BUZZ 0V 0V Open

p y p g ( p p)(2) IR pulses (2.5V p/p)



Main P7901 to Inverter (Voltage and Diode Check)Main P7901 to Inverter (Voltage and Diode Check)Inverter Run voltages taken with built in test pattern white or black where indicated.

P7901 “Main” to “Inverter” CN2

Pin Label STBY Run Diode Check1 R_VS 0V 3.31V Open

2 Gnd Gnd Gnd Gnd

3 M2_SCLK 0V 0.23V 1.06V

4 Gnd Gnd Gnd Gnd

5 M2_MOSI 0V 0V 1.07V

6 N/C n/c n/c n/c

7 N/C n/c n/c n/c

R VS8 R_VS LDIM_Reverse 0V 0.02V 1.06V

Diode Mode values taken with

1


all Connectors Removed

Main JK8700 Wireless Media Box Dongle Jack (Voltage and Diode Check)Main JK8700 Wireless Media Box Dongle Jack (Voltage and Diode Check)JK8700 Jack "MAIN Board" To "Wireless Dongle"


1-6 *24V 0V 24.65V Open

7 Detect 0V 0.3V 2.8V

8 Interrupt 0V 3.3V Open

9 Gnd 0V Gnd Gnd

10 n/c 0V 3.3V Open

11 Gnd 0V Gnd Gnd

12 I2C SCL 0V 3 3V 1 04V12 I2C_SCL 0V 3.3V 1.04V

13 I2C_SDA 0V 3.3V 1.04V

14 Gnd 0V Gnd Gnd

15 Wireless_RX 0V 3.3V 1.8V

JK8700Jack1

16 Wireless_TX 0V 3.3V 1.8V

17 Gnd 0V Gnd Gnd

18 IR 0.67V 3.3V Open

19 20 Gnd 0V Gnd Gnd

Voltages with Wireless Media Box Dongle plugged in.(Use Dongle side to read voltages. Remove cover).

*24V Switched from Q8701 Drain Back side of the board.Q8701 turned on by Q8700 front side of the board

Diode Mode values taken with all Connectors R d

19-20 Gnd 0V Gnd Gnd


Q8701 turned on by Q8700 front side of the board.Q8700 turned on by Microprocessor pin 38.

Removed

Main P7802, P7803 to TMain P7802, P7803 to T--CON/3D board (Voltage and Diode Check)CON/3D board (Voltage and Diode Check)

P7802 "Main" To "T-CON/3D" P803 P7802


1 PANEL_VCC 0V 11.58V Open

2 PANEL_VCC 0V 11.58V Open

3 Gnd Gnd Gnd Gnd

4 Gnd Gnd Gnd Gnd

1

P7803 "Main" To "T-CON/3D" P804


1 Gnd Gnd Gnd Gnd

P7803

2 E_TCK 0V 0.05V Open

3 E_TDO 0V 3.31V Open

4 E_TMS 0V 3.31V Open

5 E_TDI 0V 3.31V Open

6 Gnd Gnd Gnd Gnd1



Main P2401 Connectors (Voltage and Diode Check)Main P2401 Connectors (Voltage and Diode Check)

P2401 "Main" To "3D-Emitter"Pin LABEL SBY Run Diode Check1 +5V_EMITTER 0V 5.1V Open

P2401

2 Gnd Gnd Gnd Gnd

3 3D_SYNC 0V 0.03V Open

1



Main Board Speaker Plug P8800 Voltage and Diode CheckMain Board Speaker Plug P8800 Voltage and Diode CheckP8800 "Main" To "Speaker"

Pin LABEL SBY Run Diode CheckPin LABEL SBY Run Diode Check

1 SPK-R(-) 0V 12.28V Open

2 SPK-R(+) 0V 12.28V Open

3 SPK-L(-) 0V 12.28V Open

4 SPK-L(+) 0V 12.28V Open

There are no Stand-By Voltages for the Connector


There are no Stand-By Voltages for the ConnectorDiode Mode values taken with all Connectors Removed

Main Board Audio Voltage ChecksMain Board Audio Voltage ChecksUse speaker outputs to test for defective Audio Amp Note:

(Normal, ½ Audio B+ 12.28V)This general information covers;

• IC8801 Front Audio Out)

IC8800

Speaker Output Connectors;• P8800 Front Audio Out)

Q8800

MutePin 25

Amp 1.8V

Q8800 (Mute)Active Low. Location:Location: Top left of IC8801.Normal 3.3V Collector to Pin 25 of all three ICs. (1)

N t 3 3V i t ( i 3)

IC8801

Audio B+24.7V

Pins 49-52

Note: 3.3V input (pin 3) from IC8005

3.3V_Normal Regulator


FRONT (IR, INTELLIGENT SENSOR and MOVING LED) SECTIONFRONT (IR, INTELLIGENT SENSOR and MOVING LED) SECTION

The Intelligent Sensor and IR board (located on the bottom left as viewed from the rear) contains the IR (Infrared Remote Sensor) and the Intelligent Sensor. This board also connects with the Soft Touch Key Board and the Center LG Logo board. The Center LG Logo lights after power on and the picture appears. Then dims down in about 2 seconds. At power off, it does the reverse. It will remain on when the set is on if set up in the Customer’s Menu.

The IR board receives it operating B+ via J1 pin 6 (STBY 3.5V) 3.44V in STBY and 3.34V in Run.

The IR (Infrared) remote receiver can be measured (3.44V) at pin 9 of connector J1 or P8200 on the Main board in Stand-By. During run pin 9 reads (1.48V).

The IR pulses (1.6V p/p) J1 pin 9 are sent to P8200 on the Main board and on to the Microprocessor (IC8101) via pin 16.

The Intelligent Sensor communicates with the Micro/Video Processor IC900 BCM Chip via clock and data lines SCL1 and SDA1 arriving on connector J1 from P8200 pins 1 and 2 on the Main board.

The Front Power LEDs are controlled by these same Clock and Data lines which communicate with the LED Driver IC on the IR board.

The Key board is routed to the IR board via CON2 and output on J1 Key 1 and Key 2 lines, (Key 1 pin 4 and Key 2 pin 5). Arriving at P8200 pins 4 and 5 on the Main Board. Then to the Microprocessor 25 and 26 lines.


Front IR Board (Connections Identified)Front IR Board (Connections Identified)p/n EBR64966201

J2 To Soft Touch Key Board

IR Sensory

J3 To LG LOGO Board

J1 To Main Board


Back View

Front Board Connectors J1 and J3 Voltage and Diode CheckFront Board Connectors J1 and J3 Voltage and Diode Check

J1 "Front IR" to P8200 " MAIN" J3 "Ft IR" To "Center LOGO"


1 1SCL 3.44V 3.33V Open

2 1SDA 3.44V 3.33V Open


1 3.5V_ST 3.44V 3.3V Open2 Gnd Gnd Gnd Gnd

3 Gnd Gnd Gnd Gnd

4 KEY 1 3.29V 3.29V 1.86V

5 KEY 2 3.28V 2.27V 1.85V

6 3 5V ST 3 44V 3 34V 1 11V

2 Gnd Gnd Gnd Gnd3 *LED_LOGO 1.4V 0.54V Open4 Gnd Gnd Gnd Gnd

* 1.4V when LOGO Off. 0.54V On.6 3.5V_ST 3.44V 3.34V 1.11V

7 Gnd Gnd Gnd Gnd

8 LED_LOGO 0V 0.82V Open

9 2IR 3.44V 1.48V Open

(1) P l l t h I t lli t S i

10 Gnd Gnd Gnd Gnd

11 +3.3V_Normal 0V 3.32V 0.50V

12 LED_R/BUZZ 0V 0V Open

(1) Pulses only present when Intelligent Sensor is turned on. (3.7V p/p)

(2) IR pulses (2.5V p/p)



Front Board Connectors J2 Key Board Voltage, Resistance and Diode CheckFront Board Connectors J2 Key Board Voltage, Resistance and Diode Check

Resistance when key is pressedJ2 "IR Board" To "Moving LED and Key Board"

BUTTON KEY LINE RESISTANCENo Key Key 1 15.71M

VOL+ Key 1 1.1M

J2 IR Board To Moving LED and Key Board


1 3.5V_ST 3.44V 3.3V 1V

VOL- Key 1 1.9M

ENTER Key 1 86.6K

MENU Key 1 478.3K

2 LED_LOGO 0V 0.82V 0.78V

3 Gnd Gnd Gnd Gnd

4 Gnd Gnd Gnd Open

No Key Key 2 15.49M

CH+ Key 2 1.1M

CH- Key 2 1 9M

5 KEY 1 3.29V 3.29V Open

6 KEY 2 2.27V 2.27V Gnd

7 LED drive 3 44V 3 33V Open CH- Key 2 1.9M

INPUT Key 2 86.6K

POWER Key 2 478.3K

7 LED drive 3.44V 3.33V Open

8 LED drive 3.44V 3.33V Open



INVISIBLE SPEAKER SECTIONINVISIBLE SPEAKER SECTION

The 55LX6500 contains the 4 Magnet Invisible Speaker system. The Full Range Speakers point downward, so there is no front viewable speaker grill or air ports.

Full Range Speakerp/n EAB60961501

g p p , p g p


INTERCONNECT DIAGRAM (11 X 17 FOLDOUT SECTION)INTERCONNECT DIAGRAM (11 X 17 FOLDOUT SECTION)

This section shows the 11X17 foldout that’s available in the Paper This section shows the 11X17 foldout that’s available in the Paper and Adobe version of the Training Manual.and Adobe version of the Training Manual.gg

The Adobe version of this Training Manual allows the viewer to The Adobe version of this Training Manual allows the viewer to ggzoom in and out making reading of the small text easier.zoom in and out making reading of the small text easier.This Power Point shows a graphical representation of the 11 X 17 This Power Point shows a graphical representation of the 11 X 17 foldout page so clarity is limitedfoldout page so clarity is limitedfoldout page so clarity is limited.foldout page so clarity is limited.


55LX6500 INTERCONNECT DIAGRAM

Indicates Hot Ground

SMPS TEST 1

P201

A PWR

ON

3 17 511 915 1319 1721

4 28 612 1016 1420 1822

23

24

STBY 3.5V

12V12V

STBY 3.5V 24V24V

24V12V

INV-O

N B

SMPS TEST 2

P201

A PWR

ON

3 17 511 915 1319 1721

4 28 612 1016 1420 1822

23

24

STBY 3.5V

12V12V

STBY 3.5V

24V24V

24V12V



80% Brightness35V p/p 240Hz

Note: If a particular area (Block) is exhibiting a dimmer level that the other or the overall brightness seems dim, be sure to first check the customer’s Menu setting for Backlights. Raise the percentage and see if the overall brightness returns to normal. If not, 1st: Check the P-DIM level, it should rise with the percentage shown on screen. (100% = 3.3V). Follow the P-DIM signal all the way to the Inverter. 2nd: Turn off the set and unplug the connector CN2 to the Inverter coming from the Main board. If the brightness returns to normal, the Main board is defective.

V1~V16 Drive Signalsto LED Blocks

5% Brightness35V p/p 240Hz

Each connector (CN102 and CN103) to the LED Blocks (16 total) have two pins delivering B+ 134V and 8 Drive Signals

*To force a Block to turn on, simply ground the pin labeled V1~V16. Providing the 134V source is present.

SMPS TEST 1: To Force Power Supply On.Disconnect P8000 on Main board.(A) Jump pins 9, 10, 11 or 12 (3.5V) to pin 1. Test Voltage Outputs 12V, 24V to Main. And 24V to the Inverter. Remove AC power. Leave the jumper in place.

SMPS TEST 2: (B) Jump pins 9, 10, 11 or 12 (3.5V) to pin 18 (INV-ON). Apply AC power, the Backlights should turn on.

Note: If the Inverter is loading down 24V and causing the SMPS to shut down, Remove AC Power and disconnect P204 Check all of the SMPS voltage outputs:

Measure the connectors P102 and P103 in the Diode Mode to make sure the panel isn’t loading down the LED block B+ outputs.

Front IRJ3

Soft Touch Keys

INV 1 Drive

To TFT Panel To TFT Panel

3D IR P8200 "Main Board" To J1 "IR Board"

P805 LVDS to PanelP806 LVDS to Panel

16VVDD (16V)801.23VLRMVCLKP2716VVDD (16V)794.94VV13531.21VLRMVCLKN26GndGnd78GndV1252GndGnd253.4VVCC (3.3V)775.74VV10511.27VLRMV2N243.4VVCC (3.3V)768.31VV9501.17VLRMV2P23GndGnd7510.27VV7491.26VLRMV1N228.2VHVDD (8V)7411.07VV6481.15VLRMV1P218.2VHVDD (8V)7311.07VV5471.28VLRMV0N20GndGnd7212.26VV4461.17VLRMV0P19(-5V)VGL (-5V)7114VV345GndGnd18GndGnd7015.75VV2441.26VLLMV6N17

0.83VGOE6915.75VV1431.16VLLMV6P162.3VGSC68GndGnd421.27VLLMV5N15GndGnd670.24VSOE_L411.26VLLMV5P14

25.6VVGH (26V)66GndGnd401.26VLLMV4N13GndGnd651.66VPOL391.18VLLMV4P126VVCOMLFB640VGSP38GndGnd116VVCOMLOUT63GndH_CONV371.23VLLMVCLKN10

GndGnd623.33VOPT_N361.22VLLMVCLKP98VZ_OUT61GndGnd35GndGnd8

GndGnd601.25VLRMV6N341.29VLLMV2N7GndGnd591.17VLRMV6P331.15VLLMV2P6

0.26VV18581.26VLRMV5N321.3VLLMV1N50.26VV17571.18VLRMV5P311.18VLLMV1P40.27VV16561.25VLRMV4N301.24VLLMV0N32.68VV15551.15VLRMV4P291.19VLLMV0P23.75VV1454GndGnd28GndGnd1RUNLABELPINRUNLABELPINRUNLABELPIN

--

P802 "T-CON" to P7800 "MAIN Board"

Open11.59VPANEL_VCC48-51n/cn/cn/c47GndGndGnd42-46

1.67V1.09VRRXB4+411.67V1.26VRRXB4-401.67V1.14VRRXB3+391.67V1.22VRRXB3-38GndGndGnd37

1.67V1.2VRRXBCK+361.67V1.16VRRXBCK-35GndGndGnd34

1.67V1.14VRRXB2+331.67V1.2VRRXB2-321.67V1.16VRRXB1+311.67V1.19VRRXB1-301.67V1.19VRRXB0+291.67V1.19VRRXB0-28n/cn/cn/c27GndGndGnd26

1.67V1.08VRRXA4+251.67V1.26VRRXA4-24

Diode CheckRunLabelPin

-

-

-

-

-

-

-

1.67V1.14VRRXA3+231.67V1.20VRRXA3-22GndGndGnd21

1.67V1.20VRRXACK+201.67V1.16VRRXACK-19GndGndGnd18

1.67V1.14VRRXA2+171.67V1.22VRRXA2-161.67V1.17VRRXA1+151.67V1.19VRRXA1-141.67V1.19VRRXA0+131.67V1.17VRRXA0-12

n/cn/cn/c11Open0.05V3D_DIM_210Open0V3D_DIM9Open0V3DTV8

n/cn/cn/c7Open3.32VFRC_RESET61.73V3.34VSCL3_3.3V51.73V3.34VSDA3_3.3V4

1V3.33VV_SYNC32.34V0.03V3D_Sync_Out*2GndGndGnd1

Diode CheckRunLabelPin

-

-

-

-

-

J2 J1

801.22VRRMV6N79GndGnd5313.35VV4261.12VRRMV6P781.22VRLMV2N5214VV3251.12VRRMV5N771.13VRLMV2P5115.75VV2241.11VRRMV5P761.24VRLMV1N5015.75VV1231.24VRRMV4N750.14VRLMV1P49GndGnd221.13VRRMV4P740.17VRLMVON488VZ_OUT21GndGnd730.15VRLMVOP47GndGnd20

1.18VRRMVCLKN72GndGnd466VVCOM ROUT191.19VRRMVCLKP713.33VOPT_N456VVCOMRFB18GndGnd700.44VH_CONV44GndGnd17

1.23VRRMV2N690.25VSOE_R4325.6VVGH (26V)161.15VRRMV2P68GndGnd42GndGnd151.23VRRMV1N671.66VPOL412.3VGSC141.15VRRMV1P660VGSP400.83VGOE131.23VRRMV0N65GndGnd39GndGnd121.13VRRMV0P640.26VV1838(-5V)VGL (- 5V)11GndGnd630.27VV1737n/cOPT_P10

1.23VRLMV6N621.97VV1636GndGnd91.12VRLMV6P612.68VV15358.2VHVDD (8V)81.22VRLMV5N603.75VV14348.2VHVDD (8V)71.34VRLMV5P594.94VV1333GndGnd61.24VRLMV4N583.37VV12323.4VVCC (3.3V)51.15VRLMV4P577.71VV10313.4VVCC (3.3V)4GndGnd568.31VV930GndGnd3

1.18VRLMVCLKN5510.28VV72916VVDD (16V)21.19VRLMVCLKP5411.08VV616VVDD (16V)1RUNLABELPINRUNLABELPINRUNLABELPIN

GndGnd12.27VV527

Gnd

0.83V

0.26V--

J2 "IR Board" To "Key Board”

GndGndGndGnd4Open2.7V2.76VKey 23GndGndGndGnd2Open3.37V3.45VKey 11DiodeRun STBYLabelPin

P7802 "Main" To "T-CON” P803

GndGndGnd4GndGndGnd3Open11.55VPANEL_VCC2Open11.55VPANEL_VCC1

Diode CheckRunLABELPin

GndGndGnd4GndGndGnd3Open11.55VPANEL_VCC2Open11.55VPANEL_VCC1

Diode CheckRunLABELPin

P8800 "Main" To "Speaker”

P2401 "Main" To "3D Emitter”

J3 "IR" To "LG LOGO"

GndGndGndGnd4Open0.69V2.19VLogo Drive3GndGndGndGnd2Open3.37V3.46V3.5V_ST1DiodeRunSBYLABELPin

JK8700 Jack "MAIN Board" To "Wireless Dungle"

GndGnd0VGnd19-20Open3.3V0.67VIR18GndGnd0VGnd171.8V3.3V0VWireless_TX161.8V3.3V0VWireless_RX15GndGnd0VGnd141.04V3.3V0VI2C_SDA131.04V3.3V0VI2C_SCL12GndGnd0VGnd11Open3.3V0Vn/c10GndGnd0VGnd9Open3.3V0VInterrupt82.38V0.3V0VDetect7

24.65V0V*24V1- 6DiodeRun STBYLabelPinOpen

P204 "SMPS" To CN1 "Inverter"

P804 “TCON" to P7803 "Main Board"

GndGndGnd6Open3.32VE_TDI5Open0.35VE_TMS4Open3.33VE_TDO3Open0VE_TCK2GndGndGnd1

DiodeRunLABELPin

28

Q?LAN

1 2

3

SG

D


IC900Video Processor

LGE3549XQ

P7800

IC601

X9700

P8200

Q8201Q8200

X8101X8100

IC8101

P8100 IC8004

IC8800

Q8800

n/c

IC8801

Q8700

P8800

Q308

HDMI

IC300

IC700

USB2

USB1

IC302

X1001

IC901

IC8000

IC301IC605

Q8004

Q8003 Q8001IC8002 IC8001

IC8003IC8007

IC8008IC9702

IC603

P7901 P7802P8000

P7803

P240125MHz

32.768KHz

10MHz

SW8100

Micro Reset

IC9703Q8005

IC8005

RS232RGB

Audio Amp HDMI

Selector

Microprocessor

54MHz

Panel Vcc Sw

IC9701LG5111

INV_CTL Sw

1.8V Dimming

EEPROM

NVRAM

LVDS & Dimming

DDR DDR DDR

NAND Flash Memory

USB1 5V

USB2 5V

+ 5V Normal Reg

A1.2V Reg

D1.8V Reg

D3.3V Reg

+1.26V_TU Reg

Earphone Amp

LVDS

A2.5V Reg

USB 5V

Spk

Ft IR

+1.8V_AMP

IC8300

Wireless Media Box Remote

JK8700

HDMI

Q8307

123

Main Board Used:

EBR69488901 55LX6500-UB_AUSWLJRBU60987802 55LX6500-UB_AUSWLUR


8. NC 7. SDA 6. SCL 5. NC 4. NC 3. 5V

2. NC 1. NC

Digital Video

Analog Video

Tuner B+


Audio

TU700TDVJ-H031F

P2300

HP

SideAV

P1000 n/c

n/c

PCAudio

HDMI

HDMI

OpticalAudio

SK101AC In

D221

T102 IC502

IC103

IC501

T501

F1013.15A/250V

Q111 Q110

Q231

F1006.3A/250V

CX

103

RL101

GD

S GS

CBE

BD101

+

- Q605

D602

GDS

C A Q606

D603

GDS

C A

L600

L601

F5013.15A/250V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

V

47uF

/450

VT101 CA1

A2

CA1A2

D222

Q251

Q252

P201

P205

P204CA1

A2

D201

IC102

RL102

CX

102

CX101

D601

D100

D



D607

D102

D101

C = 3.45VA1/A2 = 0V

SMPS BOARDp/n: EAY60908802

35V220uF

Y112MHz

IC201

250V100uF

250V100uF

250V100uF

+ -

250V100uF

250V100uF

250V100uF

+ -

L101

L102

L201

L202

CN102CN103

D101

D111Q101

Q111

D141

D151Q141

Q151IC102L301

F101 24V12A/65VF102 24V12A/65VCN101

Q209

Q210Q211Q212

Q213

Q214

Q215

Q216 Q208

Q207

Q206

Q204Q205

Q203Q201

Q202

Q7

CN2

IC1IC2

IC101Q163

Q164

EB

C

Q162EB

CEB

C

Q282Q281

EB

CEB

C

E B

C

E B

C

EB

C

Q283Q285

Q284

Q286Q287

E B

C

IC601C141

35V1000uF

35V1000uF

35V1000uF

+-

35V1000uF

35V1000uF

35V1000uF

+-

M2134V

M1134V

IC103

D16D75

EB

C

Q161

Q123

Q124

EB

C Q122

EB

CQ121

24V

24V

INVERTER

CN1n/c

CN3n/c

LG LOGO

To the Panel’s LED Backlights

To the Speakers

I-C is Inverter On (INV)_ON)

Open0V0VERROR14

Openn/cn/c

13Open2.92V0V12Open0.37V~2.8V0V

GndGndGnd0.43V24.49V0V24V1-5

Diode CheckLabel

n/c11Gnd

Run STBYPin

*P-DIM (VBR-B)*I-C

6-10

P201 "SMPS" To P8000 "MAIN"

Open0V0VERROR24Openn/cn/cn/c23

Openn/cn/cn/c

221.4V11.81V0V12V21Open0.37V~3.3V0VP-DIM

201.4V11.81V0V12V19Open3.17V0VINV -ON181.4V11.81V0V12V17Openn/cn/cn/c16GndGndGndGnd13-15Open3.37V3.44V3.5V9-12GndGndGndGnd5-8

0.43V24.57V0V24V2-41.7V3.28V0VPWR-ON1

Diode CheckRun STBYLabelPin

-

-

CN103 "Inverter" To "Panel LEDs" Black Plug Pin Label STBY Run Diode Check1 Out_M1 0V 134V Open2 n/c 0V Gnd Open3 V5 0V *1V~30V Open4 V6 0V *1V~30V Open5 V7 0V *1V~30V Open6 V8 0V *1V~30V Open7 V13 0V Open8 V14 0V *1V~30V Open9 V15 0V *1V~30V Open10 V16 0V *1V~30V Open12 n/c n/c n/c Open12 Out_M2 0V 134V Open

*Black to White

P7800 "MAIN Board" To "T-CON" P802Pin Label Run Pin Label Run Diode

PANEL_VCC 11.59V Open 26 Gnd Gnd Gnd

PANEL_VCC 11.59V Open 27 RRXA4+ 1.08V 0.97V

PANEL_VCC 11.59V Open 28 RRXA4- 1.26V 1.15V

4 PANEL_VCC 11.59V Open 29 RRXA3+ 1.14V 0.97V

5 n/c n/c n/c 30 RRXA3- 1.2V 1.15V

6 Gnd Gnd Gnd 31 Gnd Gnd Gnd

7 Gnd Gnd Gnd 32 RRXACK+ 1.2V 0.97V

8 Gnd Gnd Gnd 33 RRXACK- 1.16V 1.15V

9 Gnd Gnd Gnd 34 Gnd Gnd Gnd

10 Gnd Gnd Gnd 35 RRXA2+ 1.14V 0.97V

11 RRXB4+ 1.09V 0.97V 36 RRXA2- 1.22V 1.15V

12 RRXB4- 1.26V 1.15V 37 RRXA1+ 1.17V 0.97V

13 RRXB3+ 1.14V 0.97V 38 RRXA1- 1.19V 1.15V

14 RRXB3- 1.22V 1.15V 39 RRXA0+ 1.19V 0.97V

15 Gnd Gnd Gnd 40 RRXA0- 1.17V 1.15V

16 RRXBCK+ 1.2V 0.97V 41 n/c n/c n/c

17 RRXBCK- 1.16V 1.15V 42 3D_DIM_2 0.05V 1.03V

18 Gnd Gnd Gnd 43 3D_DIM 0V 1.03V

19 RRXB2+ 1.14V 0.97V 44 3DTV 0V Open

20 RRXB2- 1.2V 1.15V 45 n/c n/c n/c

21 RRXB1+ 1.16V 0.97V 46 FRC_RESET 3.32V Open

22 RRXB1- 1.19V 1.15V 47 SCL3_3.3V 3.34V 1.04V

23 RRXB0+ 1.19V 0.97V 48 SDA3_3.3V 3.34V 1.04V

24 RRXB0- 1.19V 1.15V 49 V_SYNC 3.33V 0.998V

25 n/c n/c n/c *50 3D_Sync_Out 0.03V Open

51 Gnd Gnd Gnd

123

Diode

*Pin 2(1.6V) with 3D source


If either connector (P102 or P103) is disconnected D75 will illuminate. The

backlights will still light, but appear dimmer.

P803 "T-CON" to P7802 "Main"

n/c

CN102 "Inverter" To "Panel LEDs" White PlugPin Label STBY Run Diode Check1 Out_M1 0V 134V Open2 n/c n/c n/c Open3 V1 0V *1V~30V Open4 V2 0V *1V~30V Open5 V3 0V *1V~30V Open6 V4 0V *1V~30V Open7 n/c 0V Gnd Open8 V9 0V *1V~30V Open9 V10 0V *1V~30V Open10 V11 0V *1V~30V Open11 V12 0V *1V~30V Open12 n/c n/c n/c Open13 Out_M2 0V 134V Open

*Black to White

*1V~30V

Voltages with Dongle plugged in.(Use Dongle side to read voltages. Remove cover).

*24V Switched from Q8701 DrainQ8701 turned on by Q8700

Open12.28V4Open12.28V3Open12.28V2Open12.28V1

Diode CheckLABELPin RunSpk_R+Spk_R-Spk_L+Spk_L-

*Pin 2(1.6V) with 3D source


If D75 is Onthere is a problem.

D16 Blinks once a second (Normal)

Pin

1-5

Diode

1.33V

Gnd

Open

CN101 to SMPS P204

For voltagesSee the SMPS table for P204

6-10

11

12

13

14

Open

Open

Open

GndGndGnd4GndGndGnd3Open2Open1

RunLABELPin

GndGndGndGndOpen11.55VPANEL_VCCOpen11.55VPANEL_VCC

Diode

1.86V1.86V

Open0V0VLED_R/BUZZ120.50V3.33V0V+3.3V_Normal11GndGndGndGnd10Open1.52V1.57VIR9Open0.82V0VLED_LOGO8GndGndGndGnd7

1.11V3.37V3.46V3.5V_ST62.7V2.76VKEY 253.37V3.45VKEY 14

GndGndGndGnd3Open3.37V3.45VSDA2Open3.37V3.45VSCL1

Diode CheckRun STBYLabelPin

GndOpenOpen

N/C

A1

A2 C

P805

IC1000

E

BC E B

C

E

BC

EB

C

P806

IC102

P101X100

25MHz

IC600

1.27V

8.2V

2.52V

2.53V

3.3V

3.4V

1.05V

13

25

48

P802P804P803

IC502

IC307IC200

IC205IC302L306

1.07V

IC301L3053.34V3.35VIC304

IC1002 IC1001

IC500 IC400

SW400

IC801

L314

IC308

Q700

L700

IC201

IC204

IC700

Q702L702

1.88V1.85V

IC305

1.2VL309

IC306

L601

EB

C

E

BC

P900

L307

L600IC309

IC501

Q1004Q1003

Q1002Q1001

L701

Q701

Q906Q907

D602

D600

D601-5V (A1)

3.33V

L802

11.42VLVDS 12V

TP

n/c

A1A2C

D60316V

IC310

IC600B+ Source

11.42VLVDS 12VPins 37-38 11.22V

11.27V

2.5V 2.3V

8V Pin 11

25.6V Pin 8

6V Pin 2

16V Pin 42

3.4V L601

3.4V 23-24

8.2V

8.2V Pin 73-74

25.6V Pin 66

8V Pin 61

3.4V Pin 76-77

-5V Pin 716V Pin 63-64

16V Pin 79-80

16V Pin 1-2

3.4V Pin 4-5

6V Pin 18-1925.6V Pin 16

-5V Pin 11

8.2V Pin 7-8

8V Pin 21

Inverter CN2 pins inverted fromMain P7901.

For WaveformsSee page 3 of Interconnect Diagram

Pin

1

2-4

5-8

9-12

13-15

16

17

18

19

20

21

22

23

24

Diode

Open

Open

Gnd

1.11V

Gnd

Open

Open

1.61V

Open

Open

Open

Open

Open

Open

P8000 to SMPS P201

For voltagesSee the SMPS table for P201

CN2 "Inverter" To P7901 "Main Board" Pin Label STBY Run Diode1 n/c 0V 0.02V Open

2 n/c Gnd Gnd Gnd

3 n/c Gnd Gnd Gnd


5 Gnd Gnd Gnd Gnd

6 M2_SCLK 0V 0.05V Open

7 Gnd Gnd Gnd *Open8 R_VS 0V 3.31V Open

*Gnd on Main

Pin

12

3

4

5

6

7

8

Diode

Open

Gnd

1.06V

Gnd

1.06V

Gnd

Gnd

1.06V

P7901 to Inverter CN2

For voltagesSee the Inverter

table for CN2

p/n EBR64966201

3Gnd2

1

Open0.03V3D_SYNCGndGnd

Open5.1V+5V_EMITTERDiode CheckRunLABELPin

Original: p/n: EBR69838801Sub: p/n: EBR72073501

Use Sub p/n for interference on certain remotes.

55LX6500 MAIN (FRONT SIDE) SIMICONDUCTORS

IC300 Earphone Amp IC601 NVRAM IC8001 D1.2V and A1.2V IC8004 A2.5V Regulator IC9702 (+1.8V_L/Dimming) Q8003 PANEL_VCCPin Pin Pin Regulator Pin for USB Pin Regulator Pin Control 2nd Driver[1] 0V [1] n/c [1] 0V (Gnd) [1] n/c [1] Gnd B 0.66V[2] 0V [2] 0V [2] 3.3V [2] 3.26V (B+) [2] 11.74V (B+) C 0V[3] 0V [3] 3.34V [3] 0V (Gnd) [3] 3.26V (B+) [3] Gnd E Gnd[4] 0V [4] Gnd [4] 1.27V [4] n/c [4] 0.81V (FB)[5] 0V (HP R Out) [5] 3.34V [5] 3.32V [5] n/c [5] 0.77V Q8004 PANEL_VCC[6] 3.3V [6] 0V [6] n/c [6] 2.57V (Out) [6] 3.34V Pin Switch[7] 3.3V [7] Gnd [7] 4.48V [7] 0.83V [7] 3.32V (Out) S 11.62V (In) [8] (-1.8V) [8] 3.34V (B+) [8] 3.32V [8] Gnd [8] 3.34V (Out) G 1.8V (Enable)[9] (-0.88V) [9] 3.32V D 11.8V (Out)

[10] Gnd IC700 (+1.26V_TU) [10] 3.34V IC8005 (+3.3V_NORMAL) IC9703 EEPROM[11] 0.94V Pin Regulator [11] 1.28V Pin And D3.3V Regulator Pin for LG5111 Q8200 IR Buffer[12] 1.83V [1] 0V (Gnd) [12] Gnd [1] Gnd [1] Gnd Pin 2nd[13] 3.32V (Mute) [2] 1.27V (Out) [13] 3.3V [2] 11.74V (B+) [2] 3.34V B 0.56V[14] 3.32V (B+) [3] 3.32V (B+) [14] 0.82V [3] Gnd [3] Gnd C 0V[15] Gnd [4] 0.81V [4] Gnd E Gnd[16] 0V (HP L Out) IC8000 5V Regulator IC8002 D1.8V [5] 0.89V [5] 3.34V

Pin for USB Pin Regulator [6] 3.34V (PWR On/Off2 Ctl) [6] 3.34V Q8201 IR BufferIC301 USB 2 [1] 11.75V (B+) [1] 5V [7] 3.36V (Out) [7] 3.32V Pin 1st

Pin 5V [2] 5.1V (Out) [2] 3.35V (B+) [8] 3.36V (Out) [8] 3.34V (B+) B 0V[1] Gnd [3] 5.1V (Out) [3] 1.83V (Out) C 3.36V[2] 5.1V (In) [4] 10.5V [4] Gnd IC8007 Power Det Gen Q308 Headphone E Gnd[3] 5.1V [5] 3.3V [5] Gnd Pin (+12V and +3.5V) Pin Mute[4] 3.33V [6] 0.81V [6] 2.36V [1] Gnd B 0V Q8307 Side HDMI [5] 3.33V [7] 5.06V [7] 0.91V [2] 3.6V (B+ C 3.32V Pin Hot Swap[6] 5.1V (Out) [8] 0V (Gnd) [8] 1.05V [3] 3.5V (Out) E Gnd B 0V[7] 5.1V (Out) [9] 2.4V C 4.32V [8] n/c [10] 3.37V (PWR On/Off1 Ctl) IC8008 Power Det Gen Q8001 PANEL_VCC E Gnd

Pin (+24V) Pin Control 1st DriverIC302 USB 1 IC8003 (+5V_NORMAL) [1] Gnd B 0V Q8800 AMP Mute to

Pin 5V Pin Regulator [2] 3.64V (B+) C 0.68V AMP_MUTE1 IC8801[1] Gnd [1] Gnd [3] 3.76V (Out) E Gnd B 0V[2] 5.1V (In) [2] 11.74V (B+) C 3.34V[3] 5.1V [3] Gnd IC8800 (+1.8V_AMP) Q8700 Wireless PWR E Gnd[4] 3.33V [4] 0.81V Pin Regulator Dongle Out Turns on Q8701[5] 3.33V [5] 0.86V [1] Gnd B 0V (0.0V w/Dongle Out)[6] 5.1V (Out) [6] 3.34V (PWR On/Off2 Ctl) [2] 1.8V (Out) C 24.6V (24V w/Dongle Out)[7] 5.1V (Out) [7] 5.17V (In) [3] 3.3V (B+) E Gnd [8] n/c [8] 5.17V (In)

Q8700 Wireless PWR Q8005 INV_ONDongle In Turns on Q8701 Pin Driver

B 0.66V (0.0V w/Dongle In) B 0V (INV ON) EnC 0.14V (24V w/Dongle In) C 2.97V (Out)E Gnd E Gnd

55LX6500 MAIN (BACK SIDE) SIMICONDUCTORS

IC602 D1.8V IC8200 RS232 IC8401 EDID Data IC9000 Serial Flash Q702 Tuner Video Q8300,1,2,6 HDMI 2Pin Regulator Pin Routing Pin PC Pin T-CON Pin (Analog) Buffer Pin Det[1] 0V (Gnd) [1] 0V [1] 0V (Gnd) [1] 0.06V B 2.05V B 4.2V[2] 3.29V (PWR On/Off1 Ctl) [2] 0V [2] 0V (Gnd) [2] 0.67V C 2.75V C 0V[3] 0.9V (DDR_VTT) [3] 0V [3] 0V (Gnd) [3] 3.3V (In) E Gnd E Gnd[4] 0.93V [4] 0V [4] 0V (Gnd) [4] 0V (Gnd)[5] 1.83V [5] 0V [5] 0.7V [5] 0V Q901 FLASH_WP Q8303,4,5,7 HDMI 3[6] 3.38V (In) [6] (-5.47V) [6] 4.1V [6] 0.34V Pin for IC901 Pin Det[7] 1.8V (Out) [7] n/c (5.59V) [7] 4.5V [7] 3.31V (In) B 0V (Flash_WP) B 0V[8] 0.91V (DDR_VTT) [8] n/c (0V) [8] 4.5V (In) [8] 3.34V (In) C 3.36V C 4.2V

[9] n/c (3.3V) E Gnd E GndIC8100 EEPROM [10] n/c (0.2V) IC8700 Wireless IC9303 EEPROM

Pin Micro [11] n/c (3.3V) Pin Buffer Pin for LG5111 Q8000 RL_ON (PWR_On) Q8308 CEC Remote[1] 0V (Gnd) [12] 3.35V [1] 0V (3.3V Dongle In) [1] 0V (Gnd) Pin 1st Driver Pin HDMI CEC[2] 0V (Gnd) [13] 0V [2] 3.3V (0.3V Dongle In) [2] 0V (Gnd) B 0.66V [B] 2.72V[3] 0V (Gnd) [14] (-5.47V) [3] n/c [3] 0V (Gnd) C 0V [G] 2.73V[4] 0V (Gnd) [15] 0V (Gnd) [4] n/c [4] 0V (Gnd) E Gnd [S] 3.27V[5] 3.37V [16] 3.37V [5] n/c [5] 3.37V [D] 3.37V[6] 3.37V [6] Gnd [6] 3.37V Q8002 PWR_ON D8312 3.5V Pull Up[7] 0V (Gnd) IC8400 RGB [7] Gnd [7] 3.34V Pin Switch Pin HDMI CEC[8] 3.37V Pin H/V Sync [8] Gnd [8] 3.37V (In) [1] 3.36V (In) A1 0V

[1] 1.9V [9] n/c [2] 0V C 3.26V[2] 1.9V [10] 0.02V Q200 (1.8V_HDMI) [3] 3.3V (Out) A2 3.2V[3] 4.4V [11] 0V Pin Switch[4] 0V [12] 3.3V S 1.83V (Out) Q8203 IR Wireless Pass D8306,7,9,10 5V Pull Up Routing[5] 0.9V [13] 0V (3.3V Dongle In) G 3.35V (PWR On/Off2 Ctl) Pin 2nd Driver Pin HDMI SCL/SDA[6] n/c (4.5V) [14] 3.3V D 1.83V (In) B 0V A1 5.04V[7] 0V (Gnd) [15] 3.3V C 3.3V C 4.58V [8] n/c (4.5V) [16] 3.3V Q701 Tuner SIF E Gnd A2 0V[9] n/c (1.9V) Pin (Sound) Buffer

[10] n/c (1.9V) B 0.16V Q8205 IR Wireless Pass[11] n/c (4.5V) C Gnd Pin 1st Driver[12] 0.9V E 0.83V B 0.6V[13] 0.9V C 0V[14] 5V E Gnd

55LX6500 P7901 Main to Inverter CN2 Local Dimming Control Signals Waveforms55LX6500 P7901 Main to Inverter CN2 Local Dimming Control Signals Waveforms




Black or White


Main P9701 pin 05Inverter CN2 pin 04100 IRE (Full White)



0 IRE (Black)



Tuner Video



Black or White

55LX6500 55LX6500 Conclusion Conclusion PagePage

This concludes the 55LX6500

training session.

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