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MODELS: LH-T3039X(LH-T3039, SH33SU-S/W) / LH-T3530X(LH-T3530, SH33SD-S/W) SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL MODELS: LH-T3039X(LH-T3039, SH33SU-S/W) / LH-T3530X(LH-T3530, SH33SD-S/W) Website http://biz.lgservice.com Internal Use Only LH-T3039X LH-T3530X P/NO : AFN37064424 MAY, 2008

SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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Page 1: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

MO

DE

LS

: LH

-T3039X

(LH

-T3039, S

H33S

U-S

/W) / L

H-T

3530X(L

H-T

3530, SH

33SD

-S/W

)S

ER

VIC

E M

AN

UA

L

DVD/CD RECEIVERSERVICE MANUAL

MODELS: LH-T3039X(LH-T3039, SH33SU-S/W) /LH-T3530X(LH-T3530, SH33SD-S/W)

Website http://biz.lgservice.comInternal Use Only

LH-T3039X LH-T3530X

P/NO : AFN37064424 MAY, 2008

Page 2: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-1Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

[CONTENTS]

SECTION 1. GENERAL• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

• SERVICE INFORMATION FOR EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

• HOW TO UPDATE AUDIO MICOM & DVD PROGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

SECTION 2. ELECTRICAL PART• TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

• DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING . . . . . . . . . . . . . . .2-13

• INTERNAL BLOCK DIAGRAM OF ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45

• OVERALL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47

• CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49

• PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69

SECTION 3. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

• DECK MECHANISM EXPLODED VIEW(DP-12TV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

• PACKING ACCESSORY SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

• SPEAKER SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

SECTION 4. MECHANISM (DP-12TV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SECTION 5. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Page 3: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 1-2

SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and

impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/ordamage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reasonthe adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cottonswab should be used, taking care not to distort lens.

6) Never attempt to disassemble the pick-up.Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.(Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too muchof this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

Storage in conductive bag Drop impact

NEVER look directly at the laser beam, and don’t allow contact with fingers or other exposed skin.

Magnet

How to hold the pick-up

Conductive Sheet

Cotton swab

Pressure

Pressure

SECTION 1. GENERAL

Page 4: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-3Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components

are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, componentscan be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must betaken, therefore, to avoid repair or storage where the temperature or humidity is high, where strong magnet-ism is present, or where there is excessive dust.

2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.

When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This isbecause there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1M Ω)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent sta-

tic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Resistor(1 Mohm) Conductive

Sheet

Resistor(1 Mohm)

Armband

Page 5: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-4

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surfacesuch as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" cangenerate electrical charges sufficient to damage ESD devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.

6. Do not remove a replacement ESD device from its protective package until immediately before you areready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gener-ate static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Page 6: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-5Copyright © 2007 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

SERVICE INFORMATION FOR EEPROM (DVD PART)

POWER ON

DVD LOGO Status (NO Disk status)

Remote control Pause key-->1-->4-->7-->2 in order.

Press number 0~9, Press characterA~F (1~6 for a while)

Use arrow key ( ) tomove to appropriate position andmake changes

Press pause key once

Change will be applied when powerOFF-->ON.

NAME

OPT 1OPT 2OPT 3OPT 4OPT 5OPT 6OPT 7OPT 8OPT 9OPT AOPT BOPT COPT DOPT EOPT FOPT G

HEX

554140FF5205FC32EC00000000000000

DETECT NEW EEPROM(OPTION EDIT SCREEN)

Page 7: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

POWER ON

FLD no disc status

Remote control ‘2’ + Front ‘STOP’push same timing during 5s

FLD ‘OP-0….

Use arrow key ( ) moveto appropriate position and makechanges

Press ENTER key once

FLD ‘write ok’ or ‘up ok’

Remote control ‘2’ + Front ‘STOP’push same timing

FLD display E2P CLR or EP CLR

Auto power off

MODEL : LH-T3039NAME HEXOPT 1 17OPT 2 CAOPT 3 21OPT 4 27OPT 5 00

MODEL : LH-T3530NAME HEXOPT 1 17OPT 2 CAOPT 3 20OPT 4 27OPT 5 00

DETECT NEW EEPROM(OPTION EDIT SCREEN)

1-6

SERVICE INFORMATION FOR EEPROM (MICOM PART)

Page 8: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-7

HOW TO UPDATE AUDIO MICOM & DVD PROGRAMS

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

1. How to update AUDIO MICOM program.

[Update using CD]1. Change the filename to download as “(MODEL NAME)_(Version).HEX”. Only upper cases are permitted.

ex) HT353 : “HT353_0709081.HEX”2. Copy the file to the root folder of a CD and burn it.3. Insert the CD to the SET, and move to the DVD function. Then the upgrade process will be started with

the upgrade information.4. If the upgrade process is complete, the set will be rebooted with “Complete” message.

[Update using USB]1. Change the filename to download as “(MODEL NAME)_(Version).HEX”. Only upper cases are permitted.

ex) HT353 : “HT353_0709081.HEX”2. Copy the file to the root folder of USB storage.3. Put the USB into the SET, and move to the USB function. Then the upgrade process will be started with

the upgrade information.4. If the upgrade process is complete, the set will be rebooted with “Complete” message.

2. How to update DVD program.

[Update using CD]1. Rename the filename to download as “TARGET.BIN” in upper cases.2. Copy the file to “\MTK_UPG\” folder of CD, and burn it.

Ex) P:\MTK_UPG\TARGET.BIN3. Insert the CD to the SET, then after a while the CD tray will be opened with upgrade information on the

screen.4. Remove the CD, and press UP key in remote controller.5. Remove and reconnect the power cable when it changes to logo screen from upgrade information. Then

the upgrade process is completed.

[Update using USB]1. Rename the filename to download as “TARGET.BIN” in upper cases.2. Copy the file to “\MTK_UPG\” folder of the formatted USB, and burn it.

Ex) P:\MTK_UPG\TARGET.BIN3. Move to the USB function, and insert the USB to the set. The upgrade information will be shown on the

screen.4. Remove the USB, press UP key of the remote control.5. Remove and reconnect the power cable when it changes to logo screen from upgrade information. Then

the upgrade process is completed.

Page 9: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

1-8 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

SPECIFICATIONS

(* Depending on the sound modesettings and the source, there maybe no sound output.)

GENERALPower supply Refer to main labelPower consumption Refer to main labelNet Weight 2.5 kgExternal dimensions (W x H x D) 360 x 62 x 305 mmOperating conditions Temperature: 5°C to 35°C, Operation status: HorizontalOperating humidity 5% to 85%

AMPLIFIER

Output Power Front: 45W + 45W (Rated Output Power 30W, THD 10%)Center*: 45WSurround*: 45W + 45W (Rated Output Power 30W, 4 Ωat 1 kHz, THD 10%)Subwoofer*: 75W (Rated Output Power 60W, 8 Ωat 30 Hz, THD 10%)

SPEAKERS (SH33SU)

Front/Rear/Center Speaker Passive Subwoofer(SH33SU-S) (SH33SU-W)

Impedance 4Ω 8 ΩNet Dimensions 99 x 114 x 86 mm 156 x 325 x 320 mm(W x H x D)Net Weight (1EA) 0.35 kg 3.5 kg

SPEAKERS (SH33SD)

Front/Rear/Center Speaker Passive Subwoofer(SH33SD-S) (SH33SD-W)

Impedance 4Ω 8 ΩNet Dimensions 99 x 114 x 86 mm 156 x 325 x 320 mm(W x H x D)Net Weight (1EA) 0.35 kg 3.5 kg

Designs and specifications are subject to change without notice.

Page 10: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2-1Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

SECTION 2. ELECTRICAL PARTTROUBLESHOOTING GUIDE

1. Power Supply Circuit

YES

NO Check power plug and powersupply circuit.

NOCheck power supply circuit.

NOCheck laser circuit.

Check focus circuit.

Check disc.

NOCheck tracking servo circuit.

NOCheck audio circuit.

Does red power ledturn on?

YES

Is power on?

YES

Does red power ledturn on?

YES

Does it play?

YES

Does it outputaudio?

YES

YES

Turn power on.

INSERT POWER CORD.

OK

Page 11: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2-2 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

2. Front circuit (1/2)

NO NOReconnect it.

YES

YES YES

Check ifPN103 is ok?

Red LED turn off?

NO NORefer to SMPS part.

YESYES

Check if the frontpower is ok?

Is the Digitron oncorrectly?

NO NOCheck pattern and resoldering

YES

Check ifRC2 is ok?

Check if the remotecontrol is ok?

YES

Check if allbuttons are ok?

POWER ON.

Front B/D ok.

1

2

Page 12: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2-3Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

3. Front circuit (2/2)

1

NORefer to power(SMPS).

NO

Replace R345 ~ R350.

Check if thepower part of the

front is ok?

YES

Check ifR345~R350

ok?

YES

Refer to MICOM circuit.

2

NORefer to power(SMPS).

NO

Check RM circuit

Check if the powerpart of the front is ok?

YES

NORefer to MICOM circuit.

Check if the remotecontrol waveform of PN301

pin5 is ok?

YES

Check if RC2voltage is ok(5V)?

YES

Resolder or Replace RC2.

Page 13: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-4

4. System operation flow

YES

YES

YESTray closed?

1. Initializes SERVO, DSP & RISC registers.2.Write RISC code to SDRAM.3.Reset RISC.

Show LOGO.

Tray close to closed position.

SLED at innerside?

RecieveOPEN/ CLOSE

Key?

ReceiveCLOSE Key?

SLED moves to inner position.

1. Judge whether have disc and disc type.2. Jump to related disc reading procedure.

1.Execute Pressed Key & IR Key.2.System operation routine loop.

NO

NO

NO

NO

YES

1.Stop Playback & Open Tray.2.Display tray open message & LOGO.

POWER ON.

Page 14: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-5

5. Test & debug flow

YES

NOCheck the POWER PART.

NOCheck the POWER PART.

Check theAC voltage Power PCBA (110V

or 220V).

YES

NOCheck the regulators or diode.

NO

1. Check 27MHz system clock.2. Check system reset circuit.3. Check FLASH R/W enable signal PRD,RWR.4. Check FLASH Memory related circuit.

NO

Replace FLASH.

Are theDC Voltage outputs OK? (12V, 5.6V,

3.5V, 5V,7V, 34V).

YES

Are 3.5V and 5V DC outputs normal on main

PCBA?

YES

YES

UpdateFLASH successfully?

YES

Switch on the Power PCBA.

TEST.

A

Page 15: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-6

NO NOCheck connection linesbetween FLASH &MT1389/Land the FLASH access timewhether is suitable or not.

YES

YES

YES

YES

Check AV cableconnection to TV set.

YES

YES

YES

FlashMemory operates

properly?

NOCheck connection linesbetween SDRAM(IC504) &MT1389/L and the SDRAMis damaged.

SDRAMworks properly?

NO Check the related circuit ofMT1389/L IC501 Pins99, 102,103, 104.

MT1389/LVIDEO outputs

properly?

Show LOGO?

NO NO Check the load OPEN &CLOSE switch.

Check AV cable connectionbetween main PCBA andloader. (MECHA)

YES

YES

YES

NormalOPEN_SW,CLOSE_SW

signal?

NO Check the Tray control IO pinson MT1389/L.

NormalTROPEN & TRCLOSE

signal?

NO Check the Tray control MOTOR& SERVO circuit IC401.

NormalLOAD+ & LOAD-signal?

DoesTray move inside when it

is not at closedposition?

Power On.

A

B

Page 16: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-7

NO NO Check the connection line ofDRV_MUTE.

YES

YES

YES

Check the cable connectionwith MECHA.

Do not put in discand close tray.

YES

YES

YES

MotorDriver DRV_MUTE

pin is high?

NO Check the related circuit ofSLEGN.

MotorDriver DRV_MUTE

pin is High?

NO Check the amp circuit onmotor driver.

SLED+ andSLED- output

properly?

Doesthe SLED move to innerside when it is at outer

position?

NO NO Check Focus connection onMT1389/L and motor driver.

Check cable connection withpick-up head.

YES

YES

Proper Focus outputsto motor dricer?

NO Check the amp circuit on motordriver.Proper F+ & F- outputs?

Optical Lenshas movements forsearching Focus?

B

C

Page 17: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-8

NO

NO

NOCheck the laser power circuiton MT1389/L and connectingto power transistor.(Q401, Q402).

YES

YES

YES

YES

YES

YES

Check cable connectionbetween transistor output and

pick-up head.

Laser off.

Check the RF connectionbetween AM5890 and MT1389/L.

YES

YES

DVDLD orCDLD output

property?

NO Check the related circuit onlaser power transistor.

Collectorvoltage of power transistor

is OK?(Q401, Q402)

Laser turns on whenreading disc?

Put disc in?

NO NO Check the SPINDLE relatedcircuit on MT1389/L.

Check the cable connectionbetween spindle and main

PCB.

YES

YES

ProperSPINDLE signal on

MT1389/L.

NO Check the spindle control ampcircuit of motor driver.

SPNPSPNN output

properly?

Does spindle rotate?

NO NO Check the related circuit onMT1389/L RF signal.

ProperRF signal on MT1389/L.Disc ID is correct?

C

D

Page 18: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-9

NO NO Check connections betweenMT1389/L and pick-up head.

YES

YES

YES

YES

YES

Check CD_DVDCT connectionbetween AM5890 and

MT1389/L.

Check cable connectionon pick-up head.

YES

YES

Propersignals on A, B, C,

D of MT1389/L.

NO Check the related circuit onMT1389/L CD-DVDCT.

ProperCD-DVDCT signal

on MT1389/L.

Focus on ok?

NOCheck RF signal waveform.Disc Playback?

NO NO Check the related circuit onMT1389/L.

NO Check the TRACK connectionon MT1389/L and motor driver.

NO Check the tracking control ampcircuit on motor driver.

ProperCD-DVDCT signal

on MT1389/L.

YES

ProperTRACK signalon MT1389/L.

YES

TR+ & TR-outputproperly?

Track On OK?

D

E

Page 19: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-10

NO NO Check connection betweenIC704 BCK, LRCK, ADATAO.

YES

YES

Check Digital Amp circuit(IC702, IC703).

YES

YES

PWM ICreceived correct data

stream?

NO Check the related circuit ofPWM.(Check Audio outPins 55, 59, 61, 62, 68, 71, 75).

NormalPWM IC out?(IC704).

Normal Audiooutput when disc

playback?

E

TEST END.

Page 20: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-11

6. AMP Protection

YES

NOOK.

"PROTECTION"appears continuously on the FLD.

YES

NOReplace IC101.Is the IC101 pin54

"LOW" signal(0V)?

YES

NOReplace the Q701 and Q702.Is the Q701 and Q702 normal?

YES

YES

After unplug power cord, connect again.

YES

Power on.

"PROTECTION" appears on the FLD.

Replace ST AMP IC(IC702 and IC703)

Page 21: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-12

7. AUDIO µ-COM Circuit(DVD & AMP)

Check DVD Module.

Check SMPS.

OK

YES

Power On.

DoesCD/DVD appear at

FLD?

YES

NODoesLoading appear

at FLD?

Doesit appear DVD Error

at FLD?

Does Aux,Scart, opt and FM 87.5

appear at FLD.

YES

Doesno Disc or Timeappear at FLD?

YES

Checkif DVD an audiomicom insert is

OK.

Check Power.

YES

YES

YES

Replace IC101.

YESNO

NO

NO

NO

Refer to SMPS.NO

Refer to oscillator circuit.NO

Check IC101 resetwaveform.

NO

NO

YES

Checkpower part of Main

B/D.

Checkoscillator o

X101.

Checkif IC101 Pin5

is high.

YES

YES

YES

Check 3.3V line.NO

Check power sectioncircuit.

NO

Checkif IC101 Pin9,36,59 are

high(5V).

Checkif IC101 Pin49

is high.

YES

YES

Page 22: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-13

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL

1) MT1389/L main clock is at 27MHz(X501)

1

3 2

4

FIG 1-1

2) MT1389/L reset is high active.

Power Cord in

FIG 1-2

1

1

2

3

4

1

2

3

4

IC501

Page 23: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-14

2. SDRAM CLOCK

1) MT1389/L main clock is at 27MHz(X501)

DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V

FIG 2-1

3) Flash R/W enable signal during download(Downloading)

FIG 1-4

12

1

1

2

1

Page 24: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-15

3) Tray open waveform

FIG 3-3

3. TRAY OPEN/CLOSE SIGNAL

1) Tray open/close waveform

FIG 3-1

2) Tray close waveform

FIG 3-2

2

1

3

4

1

23

4

1

2

3

4

1

23

4

Page 25: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-16

4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)

FIG 4-1

1

2

34

1

2

3

4

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Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-17

6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 6-1

5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 5-1

1

32

13

2

1

2

3

1

2

3

Page 27: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-18

FIG 7-2 (DVD)

7. DISC TYPE JUDGEMENT WAVEFORMS

FIG 7-1 (DVD)

1

2

3

IC501

IC501

1

2

3

1

2

3

Page 28: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-19

FIG 7-4 (CD)

FIG 7-3 (CD)

1

2

3

IC501

IC501

1

2

3

1

2

3

Page 29: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-20

FIG 8-2 (CD)

8. FOCUS ON WAVEFORMS

FIG 8-1 (DVD)

1

2

3

1

2

3

4

4

1

2

43

IC501

Page 30: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-21

9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION)

FIG 9-1

10. TRACKING CONTROL RELATED SIGNAL(System checking)

FIG 10-1(DVD)

1

23

1

1

2

3

1

2

3

4IC501

Page 31: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-22

11. MT1389/L VIDEO OUTPUT WAVEFORMS

1) Full colorbar signal(COMPOSIT)

FIG 11-1

FIG 10-2(CD)

34

2

1

1

2

4

1

3

Page 32: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-23

ASDATA3

1) Audio related Signal

FIG 12-1

2) Y

FIG 11-2

12. AUDIO OUTPUT FROM mt1389/L

1

1 3 2

IC501

IC501

1

1

2

3

Page 33: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-24

1)

• R703 → TP704

2)

• R720 → TP711

3)

• R704 → TP707orR717 → TP705

4)

• R709 → TP713

5)

• R707 → TP702

6)

• R701 → TP708

13. DVD & AMP WAVEFORMS

6

5

1

4

3

2

Page 34: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-25

RF

H / O

PIN

N /

RF

G / O

PIN

P /

RF

IN / O

PO

UT

/R

FIP

AG

ND

18A

VD

D18_1

AD

AC

VD

D2

AD

AC

VD

D1

ALF

/ CE

NT

ER

/ GP

IOA

LS / G

PIO

AL / G

PIO

1A

VC

MA

R / G

PIO

0A

RS

/ GP

IOA

RF

/ LFE

/ GP

IO

AA

DV

DD

AK

IN1 / G

PIO

21 / Audio_m

uteA

DV

CM

/ GP

IO20 /

AK

IN2 / G

PIO

19 / Audio_m

ute

AD

AC

VS

S1

AD

AC

VS

S2

AP

LLCA

PA

PLLV

DD

AA

DV

SS R B G

DA

CV

DD

AD

AC

VD

DB

CV

BS

DA

CV

SS

C FS

128127126125124123122121120119118117116115114113112111110109108107106105104103102101100 99 98 97

RFA 1 96 VREFRFB 2 95 DACVDDCRFC 3 94 GPIO13

RFD 4 93 SPDIF / GPIO12RFE 5 92RFF 6 91

GPIO11GPIO10

7 90AVDD18_2 DVDD18

AVDD33_1 8 89 GPIO9XTALI 9 88 GPIO8

XTALO 10 87 GPIO7 / CKE

AGND33 11 86 RA3V20 12 85 RA2V14 13 84 DVDD33

REXT 14 83 RA1 MDI1 15 82 RA0MDI2 16 81 RA10LDO1 17 80 BA1LDO2 18 79 DVSS18

AVDD33_2 19 78 BA0DMO 20 77 RAS#FMO 21 76 CAS#

TRAY_OPEN 22 75 RWE#TRAY_CLOSE 23 74 RA4

TRO 24 73 RA5FOO 25 72 RA6

26 71 RA7USB_DP 27 70 RA8USB_DM 28 69 RA9

VDD33_USB 29 68 DVDD33VSS33_USB 30 67 RA11

PAD_VRT 31 66 RCLKVDD18_USB 32 65 DQM1

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

SF

_CS

_S

F_D

OS

F_D

IS

F_C

KU

P1_6 / S

CL

UP

1_7 / SD

AIC

EP

RS

T#

IR RD

0R

D1

RD

2R

D3

RD

4D

VD

D33

RD

5R

D6

RD

7D

VD

D18

DQ

M0

RD

15R

D14

RD

13R

D12

DV

SS

33R

D11

RD

10R

D9

RD

8

MT1389L

FG / GPIO2

GP

IO3 / IN

T#

GP

IO4

GP

IO6

1. IC501 MPEG(MT1389L)

• PIN CONFIGURATION

INTERNAL BLOCK DIAGRAM OF ICs

Page 35: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-26

RF Amplifier

DVDPUH

Module

Servo IO

SpindleControl

ServoProcessor

MemoryController

FLASHROM

DRAM

GPIO

VideoProcessor

108MHzTV Encoder

Video DAC

CVBS, Y/CComponent

Video

SystemParser

MPEG-1/2/4

JPEG

Video Decoder

AudioDSP

AudioOuptut

DebugPort

SDPIF

AudioDAC

SystemCPU

IR/VFD

De-interlacer

CPPM/CPRMDRM

32-bitRISC

MotorDrive

PCM output

Internal6ch Audio DACs

6ch Audio Analogoutputs

Audio Mic1

Audio Mic2Internal

Audio ADC

USB 2.0 HighSpeed

controller

MS/SD/MMCCard

Controller

USB 2.0 High/ Full Speed

Device

MS/SD/MMCFlash Card

1. IC501 MPEG(MT1389L)

• BLOCK DIAGRAM

Page 36: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-27

1. IC501 MPEG(MT1389L)

• PIN DESCRIPTION

Pin Main Alt. Type DescriptionAnalog I nterface (66)

125 RFIP Analog Input AC coupled DVD RF signal input RFIP126 RFIN OPOUT Analog Input AC coupled DVD RF signal input RFIN127 RFG OPINP Analog Input Main beam, RF AC input path128 RFH OPINN Analog Input Main beam, RF AC input path1 RFA Analog Input RF main beam input A2 RFB Analog Input RF main beam input B3 RFC Analog Input RF main beam input C4 RFD Analog Input RF main beam input D5 RFE Analog Input RF sub beam input E6 RFF Analog Input RF sub beam input E7 AVDD18_2 Analog power Analog 1.8V power8 AVDD33_1 Analog power Analog 3.3V power9 XTALI Input 27MHz crystal input10 XTALO Output 27MHz crystal output11 AGND33 Analog Ground Analog Ground12 V20 Analog output Reference voltage 2.0V13 V14 Analog output Reference voltage 1.4V

14 REXT Analog InputCurrent reference input. It generates reference current for RF path. Connect an external 15K resistor to this pin and AVSS

15 MDI1 Analog Input Laser power monitor input16 MDI2 Analog Input Laser power monitor input17 LDO1 Analog Output Laser driver output18 LDO2 Analog Output Laser driver output19 AVDD33_2 Analog Power Analog 3.3V power20 DMO Analog Output Disk motor control output. PWM output21 FMO Analog Output Feed motor control. PWM output22 TRAY_OPEN Analog Output Tray PWM output/Tray open output23 TRAY_CLOSE Analog Output Tray PWM output/Tray close output

24 TRO Analog OutputTracking servo output. PDM output of tracking servo compensator

25 FOO Analog OutputFocus servo output. PDM output of focus servo compensator

26 FG GPIO2 Analog1) Motor Hall sensor input 2) GPIO

27 USB_DP Analog Input USB port DPLUS analog pin28 USB_DM Analog Input USB port DMINUS analog pin29 VDD33_USB USB Power USB Power pin 3.3V30 VSS33_USB USB Ground USB ground pin31 PAD_VRT Analog Inout USB generating reference current32 VDD18_USB USB Power USB Power pin 1.8V95 DACVDDC Power Power96 VREF Analog Bandgap reference voltage97 FS Analog Full scale adjustment (suggest to use 560 ohm)98 DACVSSC Ground Ground pin for video DAC circuitry99 CVBS Analog Analog composite output

• Abbreviations:SR: Slew RatePU: Pull UpPD: Pull DownSMT: Schmitt Trigger4mA~16mA: Output buffer driving strength.

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LGE Internal Use Only 2-28

Pin Main Alt. Type Description100 DACVDDB Power 3.3V power pin for video DAC circuitry101 DACVDDA Power 3.3V power pin for video DAC circuitry102 Y/G Analog Green, Y, SY, or CVBS103 B/CB/PB Analog Blue, CB/PB, or SC104 R/CR/PR Analog Red, CR/PR, CVBS, or SY105 AADVSS Ground Ground pin for 2ch audio ADC circuitry

` 1) Audio ADC input 2 2) MS_CLK set B3) MCDATA

106 AKIN2 Analog 4) Audio Mute 5) HSYN/VSYN output 6) C5 7) GPIO1) 2ch audio ADC reference voltageC

107 ADVCM Analog 2) C63) GPIO1) Audio ADC input 1 2) MS_D0 set B 3) Audio Mute

108 AKIN1 Analog4) HSYN/VSYN output 5) C7 6) GPIO

109 AADVDD Power 3.3V power pin for 2ch audio ADC circuitry110 APLLVDD3 Power 3.3V Power pin for audio clock circuitry111 APLLCAP Analog InOut APLL external capacitance connection112 ADACVSS2 Ground Ground pin for audio DAC circuitry113 ADACVSS1 Ground Ground pin for audio DAC circuitry

114 ARF / LFE GPIO Analog Output

1) Audio DAC sub-woofer channel output 2) While internal audio DAC not used:a. ACLK b. GPIO

115 ARS GPIO Analog Output

1) Audio DAC right Surround channel output2) While internal audio DAC not used:a. ABCKb. GPIO1) Audio DAC right channel output2) While internal audio DAC not used:

116 AR Analog Output a. SDATA2b. GPIOc. RXD2

117 AV CM Analog Audio DAC reference voltage

118 AL GPIO Analog Output

1) Audio DAC left channel output2) While internal audio DAC not used:a. SDATA1b. GPIOc. RXD1

119 ALS GPIO Analog Output

1) Audio DAC left Surround channel output2) While internal audio DAC not used:a. ALRCKb. GPIO

120 ALF /CENTER GPIO Analog Output

1) Audio DAC center channel output2) While internal audio DAC not used:a. ASDATA0b. GPIO

121 ADACVDD1 Analog Power 3.3V power pin for audio DAC circuitry122 ADACVDD2 Analog Power 3.3V power pin for audio DAC circuitry123 AVDD18_1 Analog Power Analog 1.8V power124 AGND18 Analog Ground Analog Ground

General Power/ Ground (7)54, 90 DVDD18 Power 1.8V power pin for internal digital circuitry

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LGE Internal Use Only2-29

Pin Main Alt. Type Description79 DVSS18 Ground 1.8V Ground pin for internal digital circuitry

50, 68,84 DVDD33 Power 3.3V power pin for internal digital circuitry60 DVSS Ground 3.3V Ground pin for internal digital circuitry

Micro Controller , Flash I nterface and GPIO(12)

33 GPIO3 INT#InOut 1) General purpose IO 38mA, SR 2) Microcontroller external interrupt 1PD, SMT

34 GPIO4InOut

General purpose IO 44mA, PD

35 GPIO6InOut

General purpose IO 64mA, PD

36 SF_CS_InOut8mA, SR Serial Flash Chip SelectPU, SMT

37 SF_DOInOut8mA, SR Serial Flash DoutPD, SMT

38 SF_DIInOut8mA, SR Serial Flash DinPU, SMT

39 SF_CKInOut8mA, SR Serial Flash ClockPD, SMT

40 UP1_6 SCLInOut 1) Microcontroller port 1-68mA, SR 2) I2C clock pinPU, SMT

41 UP1_7 SDAInOut 1) Microcontroller port 1-74mA, SR 2) I2C data pinPU, SMT

42 ICEInput

Microcontroller ICE mode enablePD, SMT

43 PRST#Input

Power on reset input, active lowPU, SMT

44 IRInput

IR control signal inputSMTDram Interface (37) (Sorted by position)

45 RD0InOut

DRAM data 04mA

46 RD1InOut

DRAM data 14mA

47 RD2InOut

DRAM data 24mA

48 RD3InOut

DRAM data 34mA

49 RD4InOut

DRAM data 44mA

51 RD5InOut

DRAM data 54mA

52 RD6InOut

DRAM data 64mA

53 RD7InOut

DRAM data 74mA

55 DQM0InOut

Data mask 04mA, PD

56 RD15InOut

DRAM data 154mA

57 RD14InOut

DRAM data 144mA

58 RD13InOut

DRAM data 134mA

Page 39: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-30

Pin Main Alt. Type Description

59 RD12InOut

DRAM data 124mA

61 RD11InOut

DRAM data 114mA

62 RD10InOut

DRAM data 104mA

63 RD9InOut

DRAM data 94mA

64 RD8InOut

DRAM data 84mA

65 DQM1InOut

Data mask 14mA, PD

66 RCLKInOut

Dram clock4mA, PD

67 RA11InOut

DRAM address bit 114mA, PD

69 RA9InOut

DRAM address 94mA, PD

70 RA8InOut

DRAM address 84mA, PD

71 RA7InOut

DRAM address 74mA, PD

72 RA6InOut

DRAM address 64mA, PD

73 RA5InOut

DRAM address 54mA, PD

74 RA4InOut

DRAM address 44mA, PD

75 RWE#Output

DRAM Write enable, active low4mA, PD

76 CAS#Output

DRAM column address strobe, active low4mA, PD

77 RAS#Output

DRAM row address strobe, active low4mA, PD

78 BA0InOut

DRAM bank address 04mA, PD

80 BA1InOut

DRAM bank address 14mA, PD

81 RA10InOut

DRAM address 104mA, PD

82 RA0InOut

DRAM address 04mA, PD

83 RA1InOut

DRAM address 14mA, PD

85 RA2InOut

DRAM address 24mA, PD

86 RA3InOut

DRAM address 34mA, PD1) GPIO 72) Dram Clock Enable

87 GPIO7 CKEInOut 3) MS_CLK set A4mA, PD 4) Audio Mute

5) HSYN/VSYN input6) C0

GPIO (6)

88 GPIO8

1) GPIO82) MS_BS set A

InOut 3) SD_CLK set A4mA, PD 4) ASDATA2

5) ACLK

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LGE Internal Use Only2-31

Pin Main Alt. Type Description6) Audio Mute7) HSYN/VSYN input8) C11) GPIO92) MS_D0 set A

89 GPIO9 InOut 3) SD_CMD set A4mA, PD 4) ASDATA1

5) ABCK6) C27) RXD11) GPIO102) SD_CLK set B3) SD_D0 set A

91 GPIO10InOut 4) ASDATA04mA, PD 5) ALRCK

6) HSYN/VSYN output7) C38) TXD11) GPIO112) SD_CMD set B

92 GPIO11InOut 3) MS_BS set B4mA, PD 4) Audio Mute

5) HSYN/VSYN output6) C4

93 SPDIF GPIO12InOut 1) SPDIF output2mA, PD 2) GPIO12

1) GPIO13

94 GPIO13InOut 2) SD_D0 set B4mA, PD 3) ALRCK

4) Audio Mute5) YUVCLK

Page 41: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-32

2. IC401 MOTOR DRIVER

• PIN CONFIGURATION

• BLOCK DIAGRAM

Page 42: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only2-33

1. IC501 MPEG(MT1389L)

• PIN DESCRIPTION

Page 43: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-34

3. IC101 MICOM1389L)

• PIN CONFIGURATION

P83

/AN

3

P84

/AN

4

P85

/AN

5

P86

/AN

6

PC

0

PC

1

PC

2

PC

3

PC

4

PC

5/D

BG

P0

PC

6DB

GP

1

PC

7/D

BG

P2

VD

D3

VS

S3

P30

P31

LC87F5M64A

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

48 41

161514131211109876541 2 3

33343536373839404243444547 46

P70/INT0/T0LCP/AN8

P71/INT1/T0HCP/AN9

P72/INT2/T0IN/NKIN

P73/INT3/T0IN

RES

XT1/AN10

XT2/AN11

VSS1

CF1

CF2

VDD1

P80/AN0

P81/AN1

P82/AN2

P10/SO0

P11/SI0/SB0

P32/UTX1

P33/URX1

P34/UTX2

P35/URX2

P36

P37

P27/INT5/T1IN

P26/INT5/T1IN

P25/INT5/T1IN

P24/INT5/T1IN/INT7

P23INT4/T1IN

P22/INT4/T1IN

P21/INT4/T1IN

P20/INT4/T1IN/INT6

P07/T7O

P06/T6O

P12

/SC

K0

P13

/SO

1

P14

/SI1

/SB

1

P15

/SC

K1

P16

/T1P

WM

L

P17

/T1P

WM

H/B

UZ

PW

M2

PW

M3

VD

D2

VS

S2

P00

P01

P02

P03

P04

P05

/CK

O Top view

Page 44: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only2-35

• BLOCK DIAGRAM

Interrupt control

Standby control

IR PLA

Bus interface

Port 0

Port 1

SIO0

SIO1

Timer 0

Timer 1

Timer 4

Timer 5

Port 2

Port 7

Port 8

ADC

ALU

Flash ROM

PC

ACC

B register

C register

PSW

RAR

RAM

Stack pointer

Watchdog timer

CF

RC

X’tal

MRC

Clo

ckge

nera

tor

UART2 On-chip Debugger

ROM correct

PWM2/3

UART1

Base timer

Port C

Timer 6

INT0 to INT7Noise filter

Port 3

Timer 7

Page 45: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-36

3. IC101 MICOM

• PIN DESCRIPTION

Pin Name I/O Description Option

VSS1, VSS2

VSS3

- - Power supply pin No

VDD1, VDD2

VDD3

- + Power supply pin No

Port 0

P00 to P07

I/O • 8-bit I/O port

• I/O specifiable in 4-bit units

• Pull-up resistor can be turned on and off in 4-bit units

• HOLD release input

• Port 0 interrupt input

• Shared Pins

P05 : Clock output (system clock / can selected from sub clock)

P06 : Timer 6 toggle output

P07 : Timer 7 toggle output

Yes

Port 1

P10 to P17

I/O • 8-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistor can be turned on and off in 1-bit units

• Pin functions

P10 : SIO0 data output

P11 : SIO0 data input/bus I/O

P12 : SIO0 clock I/O

P13 : SIO1 data output

P14 : SIO1 data input/bus I/O

P15 : SIO1 clock I/O

P16 : Timer 1 PWML output

P17 : Timer 1 PWMH output/beeper output

Yes

Port 2 • 8-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistor can be turned on and off in 1-bit units

• Other functions

P20: INT4 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input/INT6 input/timer 0L capture 1 input

P21 to P23 : INT4 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input

P24: INT5 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input/INT7 input/timer 0H capture 1 input

P25 to P27: INT5 input/HOLD reset input/timer 1 event input/timer 0L capture input/

timer 0H capture input

• Interrupt acknowledge type

Rising FallingRising/

FallingH level L level

INT4

INT5

INT6

INT7

enable

enable

enable

enable

enable

enable

enable

enable

enable

enable

enable

enable

disable

disable

disable

disable

disable

disable

disable

disable

P20 to P27

I/O Yes

Page 46: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only2-37

Pin Name I/O Description Option

Port 7 • 4-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistor can be turned on and off in 1-bit units

• Shared pins

P70 : INT0 input/HOLD reset input/timer 0L capture input/watchdog timer output

P71 : INT1 input/HOLD reset input/timer 0H capture input

P72 : INT2 input/HOLD reset input/timer 0 event input/timer 0L capture input/

high speed clock counter input

P73 : INT3 input (with noise filter)/timer 0 event input/timer 0H capture input

AD converter input port: AN8 (P70), AN9 (P71)

• Interrupt acknowledge type

Rising FallingRising/

FallingH level L level

INT0 enable enable disable enable enable

INT1 enable enable disable enable enable

INT2 enable enable enable disable disable

INT3 enable enable enable disable disable

P70 to P73

I/O No

Port 8

P80 to P86

I/O • 7-bit I/O port

• I/O specifiable in 1-bit units

• Shared pins

AD converter input port : AN0 (P80) to AN6 (P86)

No

PWM2

PWM3

I/O • PWM2 and PWM3 output ports

• General-purpose I/O available

No

Port 3

P30 to P37

I/O • 8-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistor can be turned on and off in 1-bit units

• Pin functions

P32: UART1 transmit

P33: UART1 receive

P34: UART2 transmit

P35: UART2 receive

Yes

Port C

PC0 to PC7

I/O • 8-bit I/O port

• I/O specifiable in 1-bit units

• Pull-up resistor can be turned on and off in 1-bit units

• Pin functions

PC5 to PC7: On-chip Debugger

Yes

RES Input Reset pin No

XT1 Input • 32.768kHz crystal oscillator input pin

• Shared pins

General-purpose input port

AD converter input port : AN10

Must be connected to VDD1 if not to be used.

No

XT2 I/O • 32.768kHz crystal oscillator output pin

• Shared pins

General-purpose I/O port

AD converter input port : AN11

Must be set for oscillation and kept open if not to be used.

No

CF1 Input Ceramic resonator input pin No

CF2 Output Ceramic resonator output pin No

Page 47: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

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LGE Internal Use Only 2-38

4. IC201 ADC(CS5345)

• PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

11

12

13 14 15 16 17 18 19 20 21 22 23 24

48 47 46 45 44 43 42 41 40 39 38 37

36

35

34

33

32

31

30

29

28

27

26

25

VLSSDA/CDOUT

AG

ND

OV

FL

SCL/CCLK

AD0/CS

AD1/CDIN

VLC

RESET

AIN3A

AIN3B

AIN2A

AIN2B

AIN1A

AIN1B

VA

AF

ILT

B

VQ

TS

TO

FIL

T+

TS

TO

AIN

4A/M

ICIN

1

AIN

4B/M

ICIN

2

AIN

5A

AIN

5B

AF

ILT

A

TSTO

NC

NC

AGND

AGND

VA

PGAOUTB

PGAOUTA

AIN6B

AIN6A

MICBIAS

INT

VD

DG

ND

MC

LK

LRC

K

SC

LK

SD

OU

T

NC

NC

NC

TS

TI

CS5345

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LGE Internal Use Only2-39

VLS0.1 µF

+1.8Vto +5V

DGND

VLC

0.1 µF

+1.8Vto +5V

SCL/CCLK

SDA/CDOUT

AD1/CDIN

RESET

2 k

See Note 1

AGND

AD0/CS

Note 1: Resistors are requiredfor IC control port operation

Micro-Controller

0.1 µF

VA

* Capacitors must be C0G or equivalent

Digital AudioCapture LRCK

SDOUT

MCLK

SCLK

PGAOUTA

PGAOUTB

2.2nFAFILTAAFILTB

OVFL

2.2nF

3.3 µF

3.3 µF

47 µF0.1 µF

VQFILT+

10 µF

AGND

* *

2 k

INT

47 µF

AIN1A Left Analog Input 110 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN1B Right Analog Input 1

AIN2A Left Analog Input 210 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN2B Right Analog Input 2

AIN3A Left Analog Input 310 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN3B Right Analog Input 3

AIN4A/MICIN1 Left Analog Input 410 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN4B/MICIN2 Right Analog Input 4

AIN5A Left Analog Input 510 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN5B Right Analog Input 5

AINA Left Analog Input ;10 µF

10 µF

1800 pF

1800 pF

100 k

100 k 100

100

AIN6B Right Analog Input 6

MICBIAS

AGND

0.1 µF

*

*

*

*

*

*

*

*

*

*

*

*

NCNCNCNCNC

TSTITSTOTSTOTSTO

10 µF+3.3V to +5V

0.1 µF10 µF 0.1 µF

VAVD

+3.3V to +5V

RL

See Note 2

Note 2 The value of RL isdictated by the microphonecarteridge.

4. IC201 ADC(CS5345)

• BLOCK DIAGRAM

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LGE Internal Use Only 2-40

AIN1AAIN1B

1112

Stereo Analog Input 1 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

AGND 13 Analog Ground (Input) - Ground reference for the internal analog section.

VA 14 Analog Power (Input) - Positive power for the internal analog section.

AFILTA 15 Antialias Filter Connection (Output) - Antialias filter connection for the channel A ADC input.

AFILTB 16 Antialias Filter Connection (Output) - Antialias filter connection for the channel B ADC input.

VQ 17 Quiescent Voltage (Output) - Filter connection for the internal quiescent reference voltage.

TSTO 18 Test Pin (Output) - This pin must be left unconnected.

FILT+ 19 Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.

TSTO 20 Test Pin - This pin must be left unconnected.

AIN4A/MICIN1AIN4B/MICIN2

2122

Stereo Analog Input 4 / Microphone Input 1 & 2 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

AIN5AAIN5B

2324

Stereo Analog Input 5 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

MICBIAS 25Microphone Bias Supply (Output) - Low-noise bias supply for external microphone. Electrical charac-teristics are specified in the DC Electrical Characteristics specification table.

AIN6AAIN6B

2627

Stereo Analog Input 6 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

PGAOUTAPGAOUTB

2829

PGA Analog Audio Output (Output) - Either an analog output from the PGA block or high impedance.

VA 30 Analog Power (Input) - Positive power for the internal analog section.

AGND3132

Analog Ground (Input) - Ground reference for the internal analog section.

NC3334

No Connect - These pins are not connected internally and should be tied to ground to minimize any potential coupling effects.

TSTO 35 Test Pin (Output) - This pin must be left unconnected.

VLS 36Serial Audio Interface Power (Input) - Determines the required signal level for the serial audio inter-face. Refer to the Recommended Operating Conditions for appropriate voltages.

TSTI 37 Test Pin (Input) - This pin must be connected to ground.

NC38,39,40

No Connect - These pins are not connected internally and should be tied to ground to minimize any potential coupling effects.

SDOUT 41 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.

SCLK 42 Serial Clock (Input/Output) - Serial clock for the serial audio interface.

LRCK 43Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the serial audio data line.

MCLK 44 Master Clock (Input/Output) - Clock source for the ADC’s delta-sigma modulators.

DGND 45 Digital Ground (Input) - Ground reference for the internal digital section.

VD 46 Digital Power (Input) - Positive power for the internal digital section.

INT 47 Interrupt (Output) - Indicates an interrupt condition has occurred.

OVFL 48 Overflow (Output) - Indicates an ADC overflow condition is present.

Pin Name # Pin Description

SDA/CDOUT 1Serial Control Data (Input/Output) - SDA is a data I/O in IC ® Mode. CDOUT is the output data line for

the control port interface in SPITM Mode.

SCL/CCLK 2 Serial Control Port Clock (Input) - Serial clock for the serial control port.

AD0/CS 3Address Bit 0 (IC) / Co ntrol Port Chip Select (SPI) (Input) - AD0 is a chip address pin in IC Mode; CS is the chip-select signal for SPI format.

AD1/CDIN 4Address Bit 1 (IC) / Ser ial Control Data Input (SPI) (Input) - AD1 is a chip address pin in IC Mode; CDIN is the input data line for the control port interface in SPI Mode.

VLC 5Control Port Power (Input) - Determines the required signal level for the control port interface. Refer to the Recommended Operating Conditions for appropriate voltages.

RESET 6 Reset (Input) - The device enters a low-power mode when this pin is driven low.

AIN3AAIN3B

78

Stereo Analog Input 3 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

AIN2AAIN2B

910

Stereo Analog Input 2 (Input) - The full-scale level is specified in the ADC Analog Characteristics specification table.

• PIN DESCRIPTION

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LGE Internal Use Only2-41

5. IC704 PWM

• PIN CONFIGURATION

• BLOCK DIAGRAM

PLL

PWMModulator

Internal Controls

MLRCKMBCK

MSDIN[0:3]

SCK/SCLSO/SDA

SI/I2C_AD0/CS/I2C_AD2

PWM2_P/M

PWM3_P/M

PWM4_P/M

PWM5_P/M

PWM6_P/M

/RE

SE

T

OVERLOADEXT_MUTE

PWM1_P/M

PWM8_P/M

Internal ClockSPI/I2C

PWM7_P/M

SLRCKSBCK

SSDIN[0:3]

PWM_HP_R_P/M

PWM_HP_L_P/M

EPD_ENA

PWM_SWL_P/M

MIC_LRCKMIC_BCK

MIC_SDIN

MIC_MCLK

DMIX_MCLKOLRCKOBCK

DMIX_SDOUT

PLL

_D

VD

D

PLL

_DV

SS

PLL

_AV

DD

PLL

_A

VS

S

DV

DD

DV

SS

IO_V

DD

IO_V

SS

Power Supply

Reset & Power Down

Internal Reset

Serial AudioOutput

interface

AutomaticGain

Limiter

MainVolume

TrimVolume

BassManager

EQ

DownMixer

Mixer

Mic.Input

Processor

InputMapper

SampleRate

Converter

Input&

OutputMUX

HostInterface(I2C, SPI)

SerialAudioOutput

interface

Out

put M

appe

r

POPNRCrystal

Oscillator

XIN

XO

UT

IO_V

DD

PLL

_DV

DD

IO_V

SS

IO_V

SS

PLL

_AV

DD

IO_V

SS

PLL

_AV

SS

PLL

_DV

SS

MLR

CK

MB

CK

MS

DIN

0

MIC_LRCK

MIC_BCK

MIC_MCLK

PWM_HP_R_P

IO_V

SS

PW

M2_

P

PW

M2_

M

PW

M3_

P

PW

M3_

M

PW

M4_

P

PW

M4_

M

SPI/I2C

/CS/I2C_AD2

SI/I2C_AD0

SO/SDA

SCK/SCL

/RESET

SCAN_ENA

XIN

DVSS

IO_VSS

IO_V

SS

IO_V

SS

DVDD

DV

SS

IO_V

DD

IO_V

SS

MS

DIN

1

MS

DIN

2

SLR

CK

SB

CK

DV

SS

PW

M5_

P

PW

M5_

M

DV

DD

TEST_MODE3

DVSS

IO_V

SS

PW

M6_

P

PW

M6_

M

IO_V

SS

IO_V

SS

PWM1_P

PWM1_M

OVERLOAD

IO_VSS

IO_VSS

SS

DIN

1EXT_MUTE

DVDD

IO_V

DD

DV

DD

SS

DIN

0

MS

DIN

3

SS

DIN

2SSDIN3

IO_VSS

IO_VDD

MIC_SDIN

PWM_SWL_P

PWM_SWL_M

PWM_HP_L_P

PWM_HP_L_M

PWM_HP_R_M

IO_V

SS

PW

M7_

P

PW

M7_

M

PW

M8_

P

PW

M8_

MEPD_ENA

TEST_MODE2

TEST_MODE1

IO_VSS

DMIX_LRCK

DMIX_BCK

DMIX_SDOUT

DMIX_MCLK

98

99

100

96

97

93

94

95

91

92

85

86

87

88

89

90

83

84

81

82

7172737475 61626364656667686970 53545556575859 515260

46

47

48

49

50

9 10 11 12 13 14 15 161 2 3 4 5 6 7 8

30

31

32

33

34

35

36

37

26

27

28

29

76

77

78

79

80

17 18 19 20

38

39

40

41

42

43

44

45

21 22 23 24 25

IO_V

DD

IO_VSS

IO_VDD

DVDD

DVSS

IO_VDD

IO_V

DD

IO_V

DD

DVSS

DVDD

IO_VDD

PULSUSXOUT

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LGE Internal Use Only 2-42

5. IC704 PWM

• PIN DESCRIPTION

Name Pin NO. Type Description

Power and Ground

PLL_AVDD 6 Analog Power

PLL analog power supply.

PLL_AVSS 8 Analog Ground

PLL analog ground.

PLL_DVDD 3 PLL Power

PLL digital power supply.

PLL_DVSS 2 PLL

Ground

PLL digital ground.

DVDD 13, 34, 42,

66, 80, 91

Power Core power supply.

DVSS 14, 35, 43,

63, 81, 92

Ground Core digital ground.

IO_VDD 4,

10, 22, 29, 39, 47,

56, 65, 72, 94

Power I/O power supply. 3.3V Digital power supply.

IO_VSS 1, 5, 7, 9, 21,

28, 38, 44, 50,

53, 57, 60, 64,

69, 73, 85, 95

Ground I/O digital ground.

Reset and Clock

/RESET 96 I H/W reset signal. Active Low Schmitt-Trigger input.

The Schmitt-Trigger input allows a slowly rising input to reset the chip reliably. The RESET signal must be asserted ‘Low’ during power up. De-assert ‘High’ for normal operation.

XIN 86 Analog Crystal Oscillator input pin.

XOUT 87 Analog Crystal Oscillator output pin.

PCM Audio Input/Output Interface

MBCK 11 I/O PCM bit clock input/output of main 8-channel audio.

User can select the master/slave mode of this signal.

Schmitt-Trigger input.

MLRCK 12 I/O PCM Word clock (left-right clock) input/output of main 8-channel audio. User can select the master/slave mode of this signal. Schmitt-Trigger input.

MSDIN [3:0] 15, 16, 17, 18 I PCM serial data input of main 8-channel audio.

Schmitt-Trigger input.

SBCK 19 I/O PCM bit clock input/output of 8-channel audio.

User can select the master/slave mode of this signal.

Schmitt-Trigger input.

SLRCK 20 I/O PCM word clock (left-right clock) input/output of sub 8-channel audio. User can select the master/slave mode of this signal.

Schmitt-Trigger input.

SSDIN [3:0] 23, 24, 25, 26 I/O PCM serial data input of sub-channel audio.

User can set this sub-channel data input pins to PCM serial data output pins. See the Control Register Description part.

Schmitt-Trigger input

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LGE Internal Use Only2-43

MIC_MCLK 30 O Main clock for external microphone input A/DC.

Clock frequency can be selected between 6.144MHz, 12.288MHz, and 24.576MHz.

MIC_BCK 31 I/O PCM bit clock input/output of external microphone.

Bit clock frequency is 3.072MHz (48kHz x 64, fixed)

MIC_LRCK 32 I/O PCM Word clock (left-right clock) input/output of external microphone. Word clock rate is 48kHz (fixed).

MIC_SDIN 33 I PCM serial data input of external microphone.

Schmitt-Trigger input.

DMIX_MCLK 93 O Main clock for external down-mix line output D/AC.

DMIX_BCK 89 O PCM bit clock output of down-mix signal.

Bit clock frequency is 6.144MHz (96kHz x 64, fixed)

DMIX_LRCK 88 O PCM Word clock (left-right clock) output of down-mix signal.

Word clock rate is 96kHz (fixed).

DMIX_SDOUT 90 O PCM serial data output of down-mix signal.

PWM Audio Output

PWM1_P 49 O Positive PWM output of channel 1.

PWM1_M 48 O Negative PWM output of channel 1.

PWM2_P 52 O Positive PWM output of channel 2.

PWM2_M 51 O Negative PWM output of channel 2.

PWM3_P 55 O Positive PWM output of channel 3.

PWM3_M 54 O Negative PWM output of channel 3.

PWM4_P 59 O Positive PWM output of channel 4.

PWM4_M 58 O Negative PWM output of channel 4.

PWM5_P 62 O Positive PWM output of channel 5.

PWM5_M 61 O Negative PWM output of channel 5.

PWM6_P 68 O Positive PWM output of channel 6.

PWM6_M 67 O Negative PWM output of channel 6.

PWM7_P 71 O Positive PWM output of channel 7.

PWM7_M 70 O Negative PWM output of channel 7.

PWM8_P 75 O Positive PWM output of channel 8.

PWM8_M 74 O Negative PWM output of channel 8.

PWM_HP_L_P 46 O Positive PWM output of headphone left channel.

PWM_HP_L_M 45 O Negative PWM output of headphone left channel.

PWM_HP_R_P 41 O Positive PWM output of headphone right channel.

PWM_HP_R_M 40 O Negative PWM output of headphone right channel.

PWM_SWL_P 37 O Positive PWM output of subwoofer line output.

PWM_SWL_M 36 O Negative PWM output of subwoofer line output.

System Control Interface

SPI/I2C 84 I Host interface mode (SPI or I2C) selector.

Assert ‘HIGH’ for SPI mode. De-assert ‘LOW’ for I2C mode.

Internal pull-down resistor.

SO/SDA 78 I/O SO for SPI mode or SDA for I2C mode.

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LGE Internal Use Only 2-44

SCK/SCL 79 I SCK for SPI mode or SCL for I2C mode.

Schmitt-Trigger input.

SI/I2C_AD0 82 I SI for SPI mode or Slave Address 0 for I2C mode.

Schmitt-Trigger input.

Internal pull-down resistor.

/CS/I2C_AD2 83 I Chip selector (CS) for SPI mode or Slave Address 2 for I2C mode.

Schmitt-Trigger input.

Internal pull-down resistor.

Special Control Interface

EXT_MUTE 27 I External mute control input. Active High.

Assert ‘HIGH’ to mute audio output.

Internal pull-down resistor.

OVERLOAD 76 I Power stage overload indication input.

Polarity is programmable. Schmitt-Trigger input.

When OVERLOAD is asserted, all PWM audio outputs go to “LOW”. That shutdown process is programmable.

Internal pull-down resistor.

EPD_ENA 77 O External amplifier power device enable output. Active High.

Test Mode

TEST_MODE1 97 I Test mode selection pin 1.

In normal operation, it should be “LOW” or not connected.

Internal pull-down resistor.

TEST_MODE2 98 I Test mode selection pin 2.

In normal operation, it should be “LOW” or not connected.

Internal pull-down resistor.

SCAN_ENA 99 I Scan enable. Active High.

In normal operation, it should be “LOW” or not connected.

Internal pull-down resistor.

TEST_MODE3 100 I Test mode selection pin 3.

In normal operation, it should be “LOW” or not connected.

Internal pull-down resistor.

All inputs and bi-directional inputs are 5 Volt tolerant. The corresponding pins can be connected to the buses that can swing between 0V and 5V. The output-only pins are not 5V tolerant and the buses they are connected to can swing only between 0V and 3.3V.

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LGE Internal Use Only2-45 2-46

WIRING DIAGRAM

2007. 11. 30

PN202

CABLE1

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LGE Internal Use Only 2-47 2-48

OVERALL BLOCK DIAGRAM

2007. 11. 30

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Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

NOTES) Symbol denotes DC chassis ground.

NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.

2-49 2-50

CIRCUIT DIAGRAMS 1. SMPS(POWER) CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG CORPORATION. ALL COMPONENTSSHOULD BE REPLACED ONLY WITH TYPES IDENTI-CAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL

COMPONENTS ARE SHADED ON THE SCHEMATICFOR EASY IDENTIFICATION.THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-

FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SET IS NOT DELAYED UNTIL THE NEW SERVICELITERATURE IS PRINTED.

NOTE :1. Shaded( ) parts are critical for safety. Replace only

with specified part number.2. Voltages are DC-measured with a digital voltmeter

during Play mode.

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LGE Internal Use Only 2-51 2-52

2. MPEG CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

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LGE Internal Use Only2-53 2-54

3. SERVO CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

Page 59: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-55 2-56

4. MICOM CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

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LGE Internal Use Only2-57 2-58

5. I/O CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

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LGE Internal Use Only 2-59 2-60

6. AMP CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

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Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only2-61 2-62

7. MIC CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

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Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only 2-63 2-64

8. FRONT CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

Page 64: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2-65 2-66

9. PWR KEY CIRCUIT DIAGRAM

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

Page 65: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2-67 2-68

10. MIC & USB & PTB CIRCUIT DIAGRAM

2007. 11. 30

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R S T

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

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LGE Internal Use Only2-69 2-70

PRINTED CIRCUIT BOARD DIAGRAMS1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW )

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LGE Internal Use Only 2-71 2-72

MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW )

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LGE Internal Use Only2-73 2-74

2. SMPS P.C. BOARD DIAGRAM

NOTE: WarningParts that are shaded are critical Withrespect to risk of fire or electrical shock.

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LGE Internal Use Only

TIMER P.C BOARD DIAGRAM (LH-T3530)

2-75 2-76

3. TIMER P.C BOARD DIAGRAM (LH-T3039)

4. KEY P.C. BOARD DIAGRAM (LH-T3039)

5. FRONT JACK P.C. BOARD DIAGRAM

KEY P.C. BOARD DIAGRAM (LH-T3530)

Page 70: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

3-1 3-2Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

• CABINET AND MAIN FRAME SECTION

275

A

B

C

E

CD

E

A

B

279

A50

A43

CABLE1PN302

283

463

A47

A41

463

463

A46

300

275

467

D

262

261

260 261

A44

462

250

462

465

NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.

FRONT JACK

SMPS

MAIN

PN202

465

SECTION 3. EXPLODED VIEWS

463

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3-3 3-4 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

• DECK MECHANISM EXPLODED VIEW(DP-12TV)

012

010

012

037

012A

019442

442

A02 A01

A03

001

002

003439

018

013

017

014020

016

440

015

015B

015A

435

026

Page 72: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

3-5Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

• PACKING ACCESSORY SECTION

BATTERY808

OWNER'S MANUAL801REMOTE CONTROL900

BAG804

PACKING, CASING803

BOX802

PACKING, CASING803

825 FM WIRE ANTENNA

824 AM LOOP ANTENNARCA CABLE VIDEO(1WAY)811

PORTABLE IN CABLE 818

832 KARAOKE DISC

MICRO PHONE827

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3-6 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

1. SATELLITE SPEAKER(SH33SU-S)

853

852

850

851

WIRE84

WIRE83

WIRE82

WIRE81

WIRE80

A83

A82

A81

A80 F.L SPK

F.L SPK

F.R SPK

CENTER SPK

R.L SPK

R.R SPK

F.R SPK

R.L SPK

CENTER SPK

R.R SPKA84

• SPEAKER SECTION

Page 74: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

2. PASSIVE SUBWOOFER(SH33SU-W)

950

A90

951

953

956

954

952

955

WIRE90

3-7Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Page 75: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

3. SATELLITE SPEAKER(SH33SD-S)

853

852

850

851

A83

A82

A81

A80 F.L SPK

WIRE84

WIRE83

WIRE82

WIRE81

WIRE80 F.L SPK

F.R SPK

CENTER SPK

R.L SPK

R.R SPK

F.R SPK

R.L SPK

CENTER SPK

R.R SPKA84

3-8 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Page 76: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4. PASSIVE SUBWOOFER(SH33SD-W)

950

A90

951

953

956

954

952

955

WIRE90

3-9Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Page 77: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Page 78: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-1Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

SECTION 4. MECHANISM (DP-12TV)

[CONTENTS]

DECK MECHANISM PARTS LOCATIONS• Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2• Top View(without Tray Disc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2• Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

DECK MECHANISM DISASSEMBLY1. Main Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

1-1. Clamp Assembly Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31-1-1. Plate Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31-1-2. Magnet Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31-1-3. Clamp Upper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

2. Tray Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

3. Base Assembly Sled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43-1. Gear Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43-2. Gear Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43-3. Gear Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4. Rubber Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45. Frame Assembly Up/Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56. Belt Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57. Gear Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-58. Gear Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59. Guide Up/Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-510. PWB Assembly Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-511. Base Main . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

EXPLODED VIEW1. DECK MECHANISM EXPLODED VIEW (DP-12TV) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Page 79: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-2 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

DECK MECHANISM PARTS LOCATIONS

Starting No.

1

1, 2

1, 2, 3

1, 2, 3, 4

1

1, 6

1, 2, 6

1, 2, 6, 8

1, 2, 6, 8,

9

1, 2, 7

1, 2, 7

1, 2

1, 2 ,13

1, 2, 13, 14

1, 2, 7, 12, 13,

14

1, 2, 13

1, 2, 7, 12, 13,

14, 15, 16, 17

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Main Base

Clamp Assembly

Disc

Plate Clamp

Magnet Clamp

Clamp Upper

Tray Disc

Base Assembly Sled

Gear Feed

Gear

Middle

Gear Rack

Rubber Rear

Frame Assembly

Up/Down

Belt Loading

Gear Pulley

Gear Loading

Guide Up/Down

PWB Assembly

Loading

Base Main

4 Screws,

1 Connector

1 Locking Tabs

1 Screw

1 Screw

1 Locking Tab

1 Locking Tab

1 Locking Tab

1 Hook

2Screw

2 Locking Tabs

4-1

4-1

4-1

4-1

4-1

4-2

4-3

4-3

4-3

4-3

4-3

4-4

4-4

4-4

4-4

4-4

4-4

4-4

Bottom

Bottom

ProcedureParts Fixing Type

Fig-ure

Disassembly

NoteWhen reassembling, perform the procedure inreverse order.The “Bottom” on Disassembly column of aboveTable indicates the part should be disassembledat the Bottom side.

• Top View(without Tray Disc)

• Bottom View

• Top View

Page 80: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-3Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

DECK MECHANISM DISASSEMBLY

1. Main Base (Fig. 4-1)1-1. Clamp Assembly Disc1) Place the Clamp Assembly Disc as Fig. (A)2) Lift up the Clamp Assembly Disc in direction of

arrow(A).3) Separate the Clamp Assembly Disc from the

Holder Clamp.1-1-1. Plate Clamp1) Turn the Plate Clamp to counterclockwise

direction and then lift up the Plate Clamp.1-1-2. Magnet Clamp1-1-3. Clamp Upper

2. Tray Disc (Fig. 4-2)1) Insert and push a Driver in the emergency eject

hole(A) at the right side, or put the Driver on theLever(B) of the Gear Emergency and pull theLever(B) in direction of arrow so that the Tray Discis ejected about 15~20mm.

2) Pull the Tray Disc until it is separated from theBase Main completely.

MAIN BASE

TRAY DISC

BASE MAIN

LEVER

BASE MAIN

BOTTOM SIDE VIEW

PLATE CLAMP

MAGNET CLAMP

CLAMP UPPER

HOLDER

BASE MAIN

Fig. 4-2Fig. 4-1

(Fig. A)

DISC CLAMP ASSEMBLY

Page 81: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-4 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

3. Base Assembly Sled (Fig. 4-3)1) Release 4 Screw(S2).2) Disconnect the FFC Connector(C1)

3-1. Gear Feed3-2. Gear Middle

3-3. Gear Rack1) Release the Scerw(S3)

4. Rubber Rear (Fig. 4-3)

BASE PU

RUBBER DAMPER

RUBBER DAMPER

RUBBER DAMPERDistinguish upper and lower sides(Assemble with care)

Distinguish upper and lower sides(Assemble with care)

RUBBER DAMPER

GEAR RACK

GENERAL PICK UP ASSEMBLY

SPINDLE MOTOR ASSEMBLY

Fig. 4-3

(S2)(S2)

Page 82: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-5Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

5. Frame Assembly Up/Down (Fig. 4-4)NotePut the Base Main face down(Bottom Side)1) Release the screw(S4)2) Unlock the Locking Tab(L3) in direction of arrow

and then lift up the Frame Assembly Up/Down toseparate it from the Base Main.

Note• When reassembling move the Guide Up/Down in

direction of arrow(C) until it is positioned asFig.(C).

• When reassembling insert (A) portion of the FrameAssembly Up/Down in the (B) portion of the GuideUp/Down as Fig.(B)

6. Belt Loading(Fig. 4-4)NotePut the Base Main on original position(Top Side)

7. Gear pulley (Fig. 4-4)1) Unlock the Locking Tab(L4) in direction of arrow(B) and

then separate the Gear Pulley from the Base Main.

8. Gear Loading (Fig. 4-4)9. Guide Up/Down (Fig. 4-4)

1) Move the Guide Up/Down in direction of arrow(A) asFig.(A)

2) Push the Locking Tab(L5) down and then lift up theGuide Up/Down to separate it from the Base Main.

NoteWhen reassembling place the Guide Up/Down as Fig.(C) and move it in direction arrow(B) until it is locked by the Locking Tab(L5). And confirm the Guide Up/Down as Fig.(A)

10. PWB Assembly Loading (Fig. 4-4)NotePut the Base Main face down(Bottom Side)1) Release 1 Screws(S5)2) Unlock the Loading Motor (C2) from the Hook (H1) on

the Base Main.3) Unlock 2 Locking Tabs(L6) and separate the PWB

Assembly Loading from the Base Main.

11. Base Main(Fig. 4-4)

GEAR LOADING

GEAR PULLEY

BELT LOADING

PWB ASSEMBLY LOADING

BASE MAIN

GUIDE UP/DOWN

GUIDE UP/DOWN

GUIDE UP/DOWN

UP/DOWN FRAME ASSEMBLY

GUIDE UP/DOWN

BASE MAIN

(L6)

(L4)

(L6)

(H1)(C2)

(S5)(S4)

(S4)

(A)

(A)

(B)

(B)(C)

(L5)

FIG. (A)FIG. (B)

FIG. (C)

(A)

(B)

Fig. 4-4

SCREW INSERTION TORGUE CONTROL

(800gf DOWN)

Page 83: SERVICE MANUAL DVD/CD RECEIVER SERVICE MANUAL

4-6 Copyright © 2008 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

012

010

012

012A

019442

442

A02 A01

A03

001

002

003439

018

013

017

014020

016

440

015

015B

015A

435

026

DECK MECHANISM EXPLODED VIEW (DP-12TV)

037