PDP42_TrainingGuide

7/30/2019 PDP42_TrainingGuide

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42 Inch Plasma DisplayTraining &

Trouble Shooting Guide

G-5

PDP-42A3HD

PDP-4214HD

Technical Training Department

1925 E. Dominguez Street

Long Beach, CA 90810





Contents

Controls and Connections……..…...4~7Front View……………….……………….4Rear View…………………………….…..5Remote Control………..…………..…...6~7Basic Block Diagrams………….……8~15Overall Block Diagram…….....…………8ATSC Tuner Tuner Block……….……...9Digital Block……………………..….....10~11

DTT and Analog Block……..….…..…12~13Display Block Description& Factory Mode…………………….…14~15Signal Flow Block Diagrams………16~28Analog Tuner Input Main Flow……..…16Analog Tuner Input Sub Block…….….17Composite Input Main…………………18Composite Input Sub…………………..19S Input Main………………………….…20

S Input Sub……………………………..21ATSC (HD Signal) Main……………….22ATSC (HD Signal) Sub………………..23Component Input Main………………..24Component Input Sub…………………25HDMI Input Main……………………….26HDMI Input Sub………………………..27Caption Input…………………………..28Input and Tuner Board Locations……29

.

White Balance Adjustment.…….…...30Power Down Tip………….…………..31Troubleshooting (Tuner Module)...32~73No Power………………………………32~33No HDMI………………..………..…....34~35No Component Signal………….…....36~37No TV Signal………...………….…….38~39No Video or No S Video Signal….….40~43

No Audio…………………………….…44~50No Caption………………………….…52~53No Remote Control Operation………54~55No Key Control………………………..56~57DTT Board Troubleshooting…………58~73Disassembly………………………...…74~77Troubleshooting (PDP Panel)….….78~99Required Tools…………………….….78Parts List (Boards & Versions)………79

Basic Troubleshooting Flow Chart.….81Model & Serial Number Location….…82Panel Crack Identification…………….82Connectors and Cables……………...83~86Vertical or Horizontal Lines………..…87No Picture………………………….…..88~90Abnormalities in the Picture……….…91Power Off………………………………92~95Detaching Connectors & Boards……96~99Adjustments……………………….…100~101



Plasma Display

1 POWER button

2 STANDBY indicator

3 Current input source indicators

4 Remote control sensor

5 INP UT button

Front view

S T A N D B Y

/ O N

STANDB Y

/ON

P O W E R

P O W E RD TV T V V CR D VD H DM ISTANDBY

DTV TV VC R D VD HDMISTANDBY

5 9 10

1

6

3 42

7 8

6 OK button

7 MENU button

8 VOLUME –/+ buttons

9 CHANNEL –/+ buttons

10 STANDBY/ON button

4



Rear view

The terminals have faced downward.

1

INPUT

AUDIO

R

L

VIDEO 3

S-VIDEO 3

2 3 4 8 9 106 7

DTV-ANTENNAIN

ANTENNA /CABLEIN MONITOROUT

VIDEO

VIDEO 1 L-AUDIO-R S-VIDEO 1

AUDIO

DIGITALOUT

OPTICAL

R

L

HDMIINPUT

SERVICE ONLY AC INAUDIOHDMI

R

LV ID EO 2 L -A UD IO -R

L-AUDIO-R Y

L-AUDIO-R Y

CB /PB

CB /PB

CR /PR

CR /PR

COMPONENT 2

COMPONENT 1

S-VIDEO 2

5

1 VIDEO 3 terminals (AUDIO/VIDEO/S-VIDEO)2 DTV-ANTENNA IN terminal3 ANTENNA/CABLE IN terminal4 MONITOR OUT terminals (AUDIO/VIDEO)5 DIGITAL OUT terminal (OPTICAL)6 VIDEO 1/VIDEO 2 terminals (AUDIO/VIDEO/

S-VIDEO)

7 COMPONENT 1/COMPONENT 2 terminals(COMPONENT VIDEO/AUDIO)

8 HDMI terminal (AUDIO/HDMI)9 RS-232C terminal (service only)10 AC IN terminal

5





SPLIT SPLIT P INP SWA P

SPLIT SPLIT

DTV

SIGNAL MTS LIST

FAVORITE

CH DELETE

I N PU T S H IF T

C H + C H –

MUTING VOLCH

SPLIT SPLIT P INP S WA P

SPLIT SPLIT

DTV SIGNAL MTS LIST

CH

DELETE

I NP UT S HI FT

CH+ CH–

24

252627

23

23 SPLIT Function Buttons

SPLIT : Selects the SPLIT mode (Off, PIP, Twin1or Twin2).

SPLIT INPUT : Selects an input source for thesub picture.

P IN P/SHIFT : Selectsa position for the sub-picture.

SWAP : Interchanges the main picture andsub-picture.

SPLIT CH +, SPLIT CH – : Changes thechannel of the sub-picture.

24 DTV SIGNAL : Displays the signal strengthand quality.

25MTS : Selects the sound mode .

26 CH DELETE: Deletes a channel in Edit Chan-nel List.

27 LIST : Displays the channel list. Press the|

or

|button to select the required channel.

• W hen using the remote control unit, point it at the Plasma Display.

Slide

7



8

(Power Supply)

(Tuner Block Analog & HDTV)

(Main CPU)

(RGB Block)

(Front Panel LED's)



MDIN

150

MDIN

150

NTSCNTSC

ATSCATSC UART0 (Commu

UART1 (RS232C

UART2 (RS232CFor Debug

AudioDAC

AudioDAC

3

ATS /PDIF

Digital-SW

Digital-SW

9

ATSC Block

Operating SystemCustomer Settings

CPU & MPEG Decoder

ATSC = Advanced Television Systems Committee (Digital Television Standards)

NTSC = National Television System Committee (Analog Television Standards)



A

B

C

D

G

H

I

1. Digital PCB Block

A : Component Video input Block(BA7657)

B : ADC and HDMI receiver Block(MST3388M)

C : Real Timer Block(M41T81)D : RS232 communication part

E : Micom Block(SDA6001+K4S641632H-TC60+AM29LV160DT)F : Deinterlace Block(MDIN150+K4S643232H-TC60)

G : Sub-Video Decoder Block(VPC3230)H : Scaler Block(ASI510)

I : LVDS transmitter Block(DS90C387)

10

F

E



1. DC-DC Block is composed of Regulators(BA05(5V), LP3965ES(1.2V), LP2995MX(VREF,VTT)) and

SMPS powers(2V5VCC,3V3VCC,A6VCC).

2. UART Communication is composed of UART1(Communication), UART2(RS232), UART3(RS232 for

debug)

3. The EEPROM block stores the current states, channels, and other user setting values.

4. The Flash Rom block stores operation source.

5. ATSC input block is composed of Digital tuner(DTT7608) and channel Decorder(LGDT3303).

6. NTSC input block is composed of Analog Tuner and connects in Video decorder(uPD64012).

7. DDR SDRAM block is composed of 4 32MByte and stores the current Video and information

instantly.

8. The CPU block functions MPEG decoder, converts the video format and controls the related IC's.

9. The Audio DAC converts from IIC Audio to L/R Analog Audio.

10. The SPDIF outputs 5.1Ch Dolby Digital audio signal.

11



A

B

CF

D

E

G

J

2. DTT & Analog PCB Block

A : Channel Demodulator Block(LGDT3303)B : ATSC Tuner Block(DTT7608)C : Analog Tuner Block(FQ1236)D : DDR SDRAM Block(HY5DU281622ET-H x 4)

E : MPEG Decoder Block(TL955B2-SH)F : Audio Decoder Block(MSP4440)G : Video Switch Block(CX2069Q)H : Flash Rom Block(E28F320J3A)I : Power input BlockJ : Main Video decoder Block(uPD64012+HY57V161610DTC-7)

12

I

H



A

B

C

D

3. Digital PCB Block

A : Indication LED BlockB : Audio AMP Block(TA2024B)C : AV input BlockD : Control key Block

13



1. The ADC & HDMI receiver used on this board (MST3388-110).

2. The Video Decoder is composed of uPD64012 and VPC3230, converts from analog signal to

digital video signal. UPD64012 is used for 480I sub picture only.

3. The CXA2069 switches input signal and selects the signal. Analog Only (Tuner,YC and composite).

4. The MDIN150 is de-interlacer, it functions that interlaced signal converts de-interlaced signal and

improves picture quality. (I/P Converter)

5. The ASI510 is scaler IC, scaling video signal it interfaces with related IC and outputs 24 bit RGB

format video.

6. The SDA6001 is composed of micom and closed caption block, it controls related IC, power on/off

system, and signal flowing system.

7. IO expander functions that it increases the IO port from receiving IIC communication signal.

8. The real timer(M41T81) is timer with using the clock generator.

1. •To enter the test mode press keys on remote control in sequence as below.

TV/AV 0 9 1 7

•You can make adjustments, but proper settings are very critical for set operations

.

2. Self-check mode and error code is not applicable in this set.

14

Normally no adjustments are required to this product, even after

a repair or PCB has been changed.































Tuner / Digital / Input & SMPS Power Modules

17

20

21

10

10

10

10

10

10

12

12

11

19

8

14

14

15

16

16

10

10

10

10

10

16

10

10

1022

13

To "2.2 Exterior Section(1)

To "2.5 Rear Section

10

76

4

18

18

1

9

2

3

DescriptionPart No.

1 SMPS Assy 150-2040

2 DTT_ANALOG Assy 010-2640

3 DIGITAL Assy 010-2741

4 EMI FILTER PCB Assy 010-2742

5 • • • •

6 BRKT FAN-TOP 30172-01-001

7 FAN D05X12TL(50x50x10) 10511-07-001

8 Screw M3x14, SEMS,ZNW M1040301415

9 ASSY SHIELD MAIN 01434-0010

10 Screw M3x8, SEMS,ZNW M1040300815

11 BRKT N-FILTER 30173-01-000

12 Screw M3x8, SEM(E),ZNW M1033400615

13 BRKT REAR BOTTOM 30104-03-001

14 Screw T4x16,SS,T/T,BH,BLK M1305401617

15 BRKT MAIN AV-USA 30165-02-001

16 Screw T3x8,2S,T/T,BH,BLK M1305300817

17 Screw M3x8,3S,HH,FNI M1116300805

18 Screw M4x8,BH,BLK M1015400817

19 Wsher (Ø10) M1231111002

20 NUT UNF 3/8INCH832 M1211210002

21 ASSY SHIELD MAIN TOP M130530081722 ASSY BRKT MAIN SUPPORTER 01433-0060

29



ADJUSTMENT

ADJUSTMENT OF WHITE BALANCE

1. At shipment, the unit is adjusted to its best conditions. Normally, it is not necessary to readjust even if an assembly is replaced. If the

adjustment is shifted or if it becomes necessary to readjust because of part replacement, etc., perform the adjustment as described below.

2. Any value changed in Service/Factory mode will be stored in memory as soon as it is changed. Before readjustment, take note of the

original values for reference in case you need to restore the original settings.

3. Use a stable AC power supply.

Adjustment of White Balance

1. Equipment

• MIK7255 or Pattern Generator

• CA-210 Display Color Analyzer

• Remote Control.

2. Pattern adjustment

• ADC Calibration : Mik pattern #240

• Auto-Calibration Mode ; 480p/60Hz

; 720p/60Hz

; 480i/60Hz

• White Balance adjustment pattern: Mik pattern #446

• Color coordinate adjustment Mode: 720p/60Hz(Component)

Composite NTSC

3. STEP1: ADC-Calibration

1) At 480p, do Auto-Calibration of ADC-cut off & Gain(1 ) on Mosaic pattern(ex Mik pattern #240)

2) At 720p/60Hz, repeat 1)

3) At 480i, repeat 1).

4. STEP2: Adjustment of White - Balance

1) At Component input 1. 720p/60Hz, adjust white Balance Mid , High ,Low at pattern Full white 70%

(Ex; Mik pattern #446)

2) At Composite NTSC, repeat 1)

3) White Balance coordination (enter White Balance in Factory Mode)

How to enter; TV/AV -> 0 -> 9 -> 1-> 7 (press buttons one at a time to enter factory mode)

-> ASI510 W/B -> Done (it shows R,G,B adjustment toolbar)

(1) Mid : x=0.283 , y=0.298 +/- 0.02 (9300k)

(2) High : x=0.276 , y=0.283 +/- 0.02 (11000k)

(3) Low : x=0.313 , y=0.329 +/- 0.02 (6500k)

30



Power Down – Quick Troubleshooting Tip

Plasma Panel shuts down immediately

After power on.

First unplug the two connectors on the SMPS

Assembly (the connectors with all brown wires).

Next unplug the TMDS connector from the

Display to the panel assembly (silver shielded

connector).

Try to power the set on in this condition. If the

power stays on you will need to troubleshoot the

Panel assembly PCB’s. If the power still shuts

down you need to troubleshoot the Display, DTT,SMPS Audio or Thermal sensor assemblies.

31



Check the condition of the input power &cable connection.(JP730,JP701(DTT&Analog, JP709(Digital),JP230(AMP))

Check the condition of on-board regulators.

Check for short circuits between each power terminal and the ground.

1. No PowerPreliminary Checkpoints

#3(Power)at JP730

In digital Board

#1(M-7V)at JP730

In Digital B/D

No PowerWhen Powered ON

#5(POMUTE)at JP730

In digital Board

#74,75at U29

in digital B/D

The signal waveformof X3

in digital B/D

The data line waveformof U28

Change Digital B/D

Waveform 1

Waveform 2

Waveform 3

Waveform4,4 - 1

Waveform 5

Waveform6,6 - 1

Check SMPS

Check SMPS &MicomBlock(U29)

Check SMPS &Power Linein Digital B/D

Check the state of solderingin U401,U800,U29

Check the input powerpart in U29

Check the U28 andrelated Circuit

NG

NG

NG

NG

NG

NG

32

(Power Supply Board)



<Waveform 1 >

<Waveform 2 >

<Waveform 3 > <Waveform 6-1 >

<Waveform 4-1 >

<Waveform 5 >

33



Check the condition of Conection of the HDMI input ConnectorCheck the condition of Soldering state in HDMI input part.


2. No HDMI SignalPreliminary Checkpoints

#108,109,111,112,114,115,117,118DC level At U401In digital Board

#37,38at U401

in digital B/D

No HDMIsignal

EDID dataat U4

In digi tal Board

No soundin HDMI mode

Check the signalat JP4(HDMI Connector)

Change Digital B/D

Waveform 7

Waveform 8

Check the state of soldering

at U401,U800,U29

Check input signal part ofU401

Check HDMI_PWR&5VSTB

Check the EDID data&Audio output at U401

Change JP4

NG

NG

NG

NG

NG

34



<Waveform 7 SCL >

<Waveform 7 SDA >

<Waveform 8 >

35



Test Patterm : SMPTE Color Bats

Check the condition of connectin of the input component video signal.

Check the condition of soldering state in U401

Check the short point in signal l ine.


3. No Component Video SignalPreliminary Checkpoints

The output signalAt U401

In digital Board

#22,25,27at U1

in digital B/D

No Componentsignal (SMPTE Color Bars)

Dose the signalappear at PR14~19

In digital B/D

Dose the signalappear at

PR29,31,34,35,38,39In digital B/D

Check the LVDS Cableand JP500

in Digital B/D

Change Digital B/D

Waveform 9

Waveform 10

Waveform 11

Waveform 12

Check the state of solderingat JP1 &input signal part

Check U401 andY400 and related circuit


Check U20 andX2 and related circuit

Change the LVDS Cable&LVDS chip

NG

NG

NG

NG

NG

36



< Waveform 9 #22 >

< Waveform 9 #25 >

< Waveform 9 #27 > < Waveform 12 >

< Waveform 10 >

< Waveform 11 >

37



Check the condition of connectin of the input TV signal.

Check the condition of soldering state in Tuner & input partCheck the short point in signal line.


4. No TV SignalPreliminary Checkpoints

#119At U711

In DTT&Analog Board

#63at U706

in DTT & Analog B/D

No TVsignal (SMPTE Color Bars)

Dose the signalappear at PR22,24

25,26 In DTT&AnalogB/D


PR29,31,34,35,38,39In digital B/D


in Digital B/D

Change Digital B/D

Waveform 13

Waveform 14

Waveform 11

Waveform 12

Check A_CVBS1 inputpart

Check U706 &input part of U711




NG

NG

NG

NG

NG

38



< Waveform 13 >

< Waveform 14 >

< Waveform 11 >

< Waveform 12 >

39



Check the condition of connectin of the input CVBS signal.

Check the condition of soldering state in CVBS & input partCheck the short point in signal line.


5. No Video Signal (CVBS)Preliminary Checkpoints

#119At U711

In DTT&Analog Board

#8(1),15(2),22(3)at U706

in DTT & Analog B/D

No CVBSsignal (SMPTE Color Bars)




PR29,31,34,35,38,39In digital B/D


in Digital B/D

Change Digital B/D

Waveform 15

Waveform 14

Waveform 11

Waveform 12

Check CVBS inputpart





NG

(1):VIDEO01(2):VIDEO01(3):VIDEO01

NG

NG

NG

NG

40



< Waveform 15 >

< Waveform 14 >

< Waveform 11 >

< Waveform 12 >

41



Check the condition of connectin of the input S-VHS signal.

Check the condition of soldering state in S-VHS & input partCheck the short poi nt in signal line.


6. No Video Signal (S-VHS)Preliminary Checkpoints

#121,128At U711

In DTT&Analog Board

#10,12(1),17,19(2),24,26(3)

at U706in DTT & Analog B/D

No S-VHSsignal (SMPTE Color Bars)




PR29,31,34,35,38,39In digital B/D

Check the LVDS Cable

and JP500in Digital B/D

Change Digital B/D

Waveform16,16-1

Waveform17,17-1

Waveform 11

Waveform 12

Check CVBS input

part


Check U16 and

Y2 and related circuit


Change the LVDS Cable

&LVDS chip

NG

(1):S-VIDEO01(2):S-VIDEO01(3):S-VIDEO01

NG

NG

NG

NG

42



< Waveform 16 C >

< Waveform 16 Y >

< Waveform 17 C >

< Waveform 12 >

< Waveform 12 >

< Waveform 17 Y >

43



Check the condition of connectin of the input DVI Audio R/L.

Check the condition of soldering state in DVI Audio R/L &input partCheck the short point in signal line.


7. No Sound DVI Audio (Sine wave input)Preliminary Checkpoints

#56,57At U751

In DTT&Analog Board

#29,31at U706

in DTT & Analog B/D

No Sound inDVI Audio R/L

#11,15At U200

In Audio Amp Board

#28,31,27,24At U200

Change Speaker

Waveform 20

Waveform 19

Waveform 18

Waveform 21

Check DVI Audio input

part


Check U751 and



NG

NG

NG

NG

44



< Waveform 18 >

< Waveform 19 >

< Waveform 20 >

< Waveform 21 >

45



Check the condition of connectin of the input CVBS Audio R/L.

Check the condition of soldering state in CVBS Audio R/L & input part

Check the short point in signal line.


8. No Sound in CVBS (Sine wave input)Preliminary Checkpoints

#56,57At U751

In DTT&Analog Board

#9,11(1),16,18(2),23,25(3)


No Sound inCVBS Audio R/L

#11,15At U200

In Audio Amp Board

#28,31,27,24At U200

Change Speaker

Waveform 20

Waveform 19

Waveform 18

Waveform 21

Check CVBS Audio input

part


Check U751 and



NG

NG

NG

NG

(1):VIDEO01 Audio(2):VIDEO01 Audio(3):VIDEO01 Audio

46



< Waveform 18 >

< Waveform 19 >

< Waveform 20 >

< Waveform 21 >

47



Check the condition of connectin of the input Component Audio R/L.

Check the condition of soldering state in Component Audio R/L &input part



9. No Audio in Component Input (Sine wave input)Preliminary Checkpoints

#50,51(1),47,48(2)


No Sound inComponent Audio R/L

#11,15At U200

In Audio Amp Board

#28,31,27,24At U200

Change Speaker

Waveform 20

Waveform 19

Waveform 21

Check Component Audio

input part


Check U20 and

X2 and related circuit

NG

NG

NG

(1):Component1 Audio(2):Component2 Audio

48



< Waveform 19 >

< Waveform 20 >

< Waveform 21 >

49



Check the condition of connectin of the input TV SIF.

Check the condition of soldering state in TV SIF input part.



10. No TV Sound (Sine wave input)Preliminary Checkpoints

#67at U751

in DTT & Analog B/D

No Sound inTV input

#11,15At U200

In Audio Amp Board

#28,31,27,24At U200

Change Speaker

Waveform 20

Waveform 22

Waveform 21

Check TV SIF input part


Check U20 and

X2 and related circuit

NG

NG

NG

50



< Waveform 22 >

< Waveform 20 >

< Waveform 21 >

51



Check the back Solding state in 96 pin connector(JP12(Digital),JP701(DTT&Analog))

Check the CC_RD,GD,BD,FB,VD,HD signal in I C.

Check the I2C between Micom and uPD64012 or EEPROM.

Check the Flash Memory or SDRAM.

11. No CaptionPreliminary Checkpoints

Check the Micom_CVBS(Pin 121)

of IC SDA6001(U29)

CC in Remocon isO.K. but the CC Does

Not display

Check CC_R,G,B,FB,H,V-syncof IC SDA6001(U29)

Change the uPD64012

Waveform 24R,G,B,FB,H-sync

V-sync

Waveform 23

Check Micom CVBSConnection part

Check the crystal(X2)and related parts on U29

NG

OK

OK

OK

NG

52



< Waveform 24 R >

< Waveform 24 G >

< Waveform 24 B >

< Waveform 24 FB >

< Waveform 24 H-sync >

< Waveform 24 V-sync >

53



Check the Solder state and pin of Connector JP10

Check the Solder state in LED Board.

Check the I2C between Micom and EEPROM.


12. Remocon

Remocon switch push but the key does not function

Preliminary Checkpoints

Check the IR Micom(Pin 76)of IC SDA6001(U29)

Remocon is O.K. butthe Function does not

operate.

When you powerswitch off,the set off

Exchange the Digital Board

Waveform 25

Check Remocon outputand Power in LED Board

Exchange the IC(UP1)

NG

OK

OK

Check the Micom part(IIC Comunication, other

Control line)Exchange the IC(U29)

NG

OK

OK

NG

54



< Waveform 25 >

55



Check the Solder state and pin of Connector JP10

Check the Solder state in Key Board.

Check the I2C between Micom and EEPROM.


13. Key

Key switch is OK but the key does not function


Check the key1,key2(Pin 124,125)

of IC SDA6001(U29)

Control key is O.K. butthe Function does not

operate.

Check IR processor(UP1)

Exchange the Digital Board

Waveform 26

Check Control Key Boardand Power in LED Board

Exchange the IC(UP1)

NG

OK

OK

Check the Micom part(IIC Comunication, other

Control line)Exchange the IC(U29)

NG

OK

OK

NG

56



< Waveform 26 >

< Waveform 26-1 >

57



Check the condition of the input power &cable connection. (JP709)Check the condition of on-board regulators.


DTT Basic Inspection

Not Working When Powered On


Check the voltage outputof JP709 & JP701.

Not WorkingWhen Powered On

Check the output voltageof on-board regulators

Check the power line pathfrom on-board regulators

to each components.

Note) Please refer to the power diagram of PAU-42THD for detail power connectivity information.Note) Each input power of DTT comes via the digital board of SMPS directly. So, please check

the digital board prior to SMPS when power input is not working properly.

Check the Digital Board orSMPS

*JP 7091. 3.3V2. 3.3V

3. 3.3V4. GND5. GND6. GND7. 2.5V8. 2.5V9. 2.5V10. GND11. GND12. GND

*JP 7019. A6VCC10. A6VCC

Check the soldering status ofon-board regulators.

Perform short circuit test oneach power lines.

NG

OK

OK

Check the voltage outputof JP709 & JP701 after

connecting them.

Perform short circuit test oneach power lines.

NG

OK

Check the input voltage

of on-board regulators

Check the power line path

from connectorto on-board regulators.

NG

OK

OK

NG

58



Check the battery condition of the Remote Control Unit.Check against the a set that works normally to see if the RCU (Remote Control Unit) is working.

Check whether the connector between Digital Board and DTT&Analog Board is connected. (JP701)

Note that DTT board does not receive the key directly from RCU. Instead, MCU of digital board

gets the keys and passes them to DTT through the UART0. (Pin 34 &35 of JP701)

Basic Inspection

Mulfunction or Not Working of Remote Control Unit


< Waveform 1 >

Check the battery of the RCU.Check the RCU.

Mulfunction or NotWorking of Remote

Control Unit

Check the UART0_RX signal(Pin 33 of JP701)

Check signal line path to themain CPU of DTT board

(U2)

Waveform 1 (When 'OK' key is pressed)

Replace the battery/RCU

Check the digital board / Check the IR & LED board

NG

OK

Check the connector(JP701)

Secure the connectorNG

OK

OK

NG

59



Check the System Clock (27MHz)and the RESET terminal of CPU.

Check the UART communication terminals between CPU and digital board (UART0).Check the I2C between CPU and LGDT3303 or EEPROM.

Check the Flash Memory or DDR-SDRAM.

Basic Inspection

Power Supply is O.K. but the DTT Does Not Wake Up


Useful Tips

1. An Unstable 27 MHz clock may be due to defect of X-TAL or clock generator (U261). Replace the X-Tal or U261.

2. DDR-SDRAM have difference clock inputs which are positive and others are negative signal (Double Data Rate).

3. Vref and VTT are have Vcc/2 and check the power source whether defected.

4. When replacing parts, be cearful of static charges from the tip of the solder iron that can easily damage the parts.

Also, check for assembly condition, soldering condition, or for incorrect or reverse insertion of parts.

5. If the problems are caused by CPU, change CPU board and download Serial Number.

Check the SystemClock 27MHz (Pin 15) of ICMK2475-33G (U261)

Power Supply is O.K.but the STB Does Not

Wake up

Check RESET, CS and OEsignals of Flash Memory

Check for other defective

modes

Waveform 5Ch1:Reset, Ch2:CS/ Ch3:OE/

Check X-Tal(Y261) andrelated parts

Check Flash Memory(U40) or related parts

NG

OK

Check DDR-SDRAM Clock(Pin 45 and 46) of DDR-SDRAM

(U5, U6, U7 and U8)

Check the Vref and VTT voltageand clock of

DDR-SDRAM or related parts

NG

OK

Check system reset of Pin1 onU281

Check the soldering state ofU281 or Replace U281

NG

OK

OK

NG

Waveform 2

Waveform 3Ch:CLK, Ch2:CLK~

Waveform 4Ch:3.3V, Ch2:Reset

60



< Waveform 2 > < Waveform 5 >

< Waveform 3 >

< Waveform 4 >

61



The system clock 27MHz must be stable during the System Reset or the Power On Reset.

However, if X-TAL is defective, the clock may not become stable until RESET is released.To check reset timing, turn the main power off and back on, and check if the following waveform is maintained.

Basic Inspection

Does Not Boot after Power-On or System Reset


Useful Tips

1. The CPU have two 12C for system controller.

One is communicate with system 12C(TDA10046) and the other is communicate with serial EFPROM for storing data.

2. When the system will not operate even though the basic inspection results were normal, check Flash Memory which

contains channel data and program contents.

3. Additionally check for Local DATA and Local ADDRESS buses between CPU and Flash Memory.

4. When replacing parts, be careful of static changes from the tip of the solder iron that can easily damage the parts.

Also, check for assembly condition, soldering condition, or for incorrect or reverse insertion of parts.

5. If the problems are caused by CPU, change CPU board and download Serial Number.

Check the Reset andclock timing of CPU

Does Not Boot afterSystem/Power-On Reset

Check the 12C Line(Pin 6, 5 of U31)

Check for other defectivemodes

27 MHz Clock problemReset timing promlem

OK

Check the communicationbetween DTT and

digital board

Check the soldering statusof JP282.

Check the digital board

Check the soldering statusof X-TAL(Y261) and U261

Check the reset signal ofFlash and Pin1 of U281

NG

OK

Check Flash Memory Check the waveform CS

and OE of Flash Memory

NGCheck the soldering status

of U40(Flash Memory)and U62

NG

Check the soldering state ofEFPROM

NG

OK

OK

Waveform 5

Waveform 6Ch1:SLC, Ch2:SDA

Waveform 2Waveform 4

62




< Waveform 4 >

< Waveform 5 >

63





< Waveform 5 >

< Waveform 7 >

65



MPEG INSPECTION

If the system does not respond even though no problems were found during the basic inspection

and the CPU/Flash inspection, you will need to check the DDR-SDRAM interface.

Check control lines between DDR-SDRAM and CPU also data/address lines.

The main cause of the problems related to System Memory (i.e.Flash and DDR-SDRAM)is the soldering of parts.

Therefore, in the event of a problem, first check the condition of the soldering and the power supply of IC.

MPEG Inspection

No problems Found during Basic and CPU/System Memory Inspections, but MPEG Does Not Play.- Check DDR SDRAM Interface/Transport Stream(TS).


< Waveform 7 >

Useful Tips1. Make sure that basic function of the system is normal by checking that the VFD toggles

each time you press the Front power key.2. Check the interface between CPU and DDR-SDRAM U5, U6, U7 and U8.

The interface is composed of clock(133MHz), address, data and control signals.3. If all connections are complete, replace the DDR-SDRAM.4. If the problems are caused by CPU, change CPU board and download Serial Number.

Check the output of DDRSDRAM control interface

No problems Found onduring Basic/Memory

Inspections but MPEG PlayDoes Not Work

Check the adress and data linesof between CPU and DDR-SDRAM

Check the soldingstatus of DDR-SDRAM(U5, U6, U7 and U8)


Recheck the basic inspevtionitems

NG

NG OK

OK OK

Waveform 8Ch1:RAS/, Ch2:CAS/, Ch3:WE/

Waveform 7

< Waveform 8 > 66



A/ V INSPECTION

If no video is output while the UI(User Interface)and key controls are normal,

first check the video output signal of CPU.

If no video signal found,check the TS parallel data between CPU and U531.

If no output of TS data,check the U531 and relevant components.

A/V InspectionNo Video Output - CVBS/YPbPr


< Waveform 9-1 > < Waveform 9-2 >

Check the Video outputof CPU

U2(PIN:A9):CVBSU2(PIN:B9, C9):

S-VHSJP141(PIN1, 3, 5,):YPbPr

No video Output

Check the TS line betweenCPU and U531


Waveform 9-1 (CVBS)Waveform 9-2 (YPbPr)

Check the path betweenCPU and JP705, JP706 (Incorrect

insertion, poor soldering, shortcircuits, damage, etc.)

Check the TS signal path fromtuner to U531.

NG

OK

OK

OK

NG

Useful Tips

1. If no output of TS data but tuner is good, check the U531 and relevant components.

67



If no audio is output through JP800 while the system is normal, first check the

CPU AUDIO output and clock. [I2S interface ].

If no problems were found, check the U671 for Audio DAC.

A/V InspectionNo Audio Output



Check the CPU12S output

No Audio Output

Check the Audio clockPin 9 of U261

Check for otherdefective modes

Waveform 10Ch1:SCLK,

Ch2:LRCLK,Ch3:ADATA0

Check the path betweenCPU and Clock

(Incorrect insertion, poor soldering,short circuits, damage, etc.)

Check the path betweenAudio DAC and CPU

(Incorrect insertion, poor solding,short circuits, damage, etc)

Check the X-TAL and U261(Incorrect insertion, poor soldering,

short circuits, damage, etc)

NG

OK

OK

OK

NG

Check the Audio DAC forU761

OK

NG

Useful Tips

1. The Audio problem largely from the defect of CPU, Audio DAC or incomplete soldering of the parts located alongthe audio output path.

2. Audio DAC pins represent serial data, LR clock, Bit clock and system clock, respectively.

Waveform 11

68



If the SPDIF output is not working while the system is normal (Including MPEG

play and A/V output), check for any problems with the SPDIF output of CPU.

A/V InspectionNo digital audio output


< Waveform 13 >

No IEC958 Digital Output

Check the IEC958 output

signal J5 of U2

Check for otherdefective modes

Check the path betweenCPU and IEC958 line

(Incorrect insertion, poor soldering,short circuits, damage, etc.)

NG

OK

Waveform 13

69



CHANNEL INSPECTION

If channel locking fails even though there is no problems with the system, check

the Interface between Tuner, LGDT3303 and CPU.

Channel InspectionNo Channel Locking with No Problems with Power/CPU


Check the LGDT3303input voltage

- LDGT3303 Input Power* +3.3V

Pin21, 35, 61, 93* +1.8V

PIN16, 19, 32, 42, 47, 55, 63,68, 74, 81, 85, 89, 100

Channel locking failure

Check other relatedpart

After the basic inspection, check thepath between U501 and LGDT3303(Incorrect insertion, poor soldering,

short circuits, damage, etc)

NG

OK

Check the LGDT3303 input(Reset) = high

- LDGT3303 PIN26* low : reset on* high : reset release

Check the path betweenCPU and LGDT3303 (Incorrectinsertion, poor soldering, short

circuits, damage, etc.)

NG

OK

Check the LGDT3303input clock

- LGDT3303 Pin 79, 80* 25MHz clock Check the path between

LGDT3303 and X-Tal (Incorrectinsertion, poor soldering, short


NG

OK

Check the 12C control

- 12C CLOCK [PIN48]- 12C DATA[PIN49] Check the path between

devices the LGDT3303 and EEPROMAlso, check Incorrect insertion, poorsoldering, short circuits, damage, etc.)

NG

Useful Tips

1. Check the power byU532 are properly provided to the U531.2. Check the 12C interface between tuner and 10046. If no problem, inspect along the tuner output path to TDA10046.

Whether the components of R, L, C's soldering status.3. If no problem, replace the Tuner.4. If the problems are founded by CPU, replace the CPU board and also download SN.

Waveform 14

70



< Waveform 14 >

71



CHANNEL INSPECTION 2

If channel Locking fails even though there is no problems with the system, check

the TUNER 12C BUS and IF signals.

If the Tuner 12C and IF signals are good but cannot search, check TS data goes to CPU

Channel InspectionNo Channel Locking with No Problems with Power/CPU


Check the TUNER power

* +5VDT of PIN 3, 7

Channel locking failure


After the basic inspection, check thepath between SMPS and TUNER

(Incorrect insertion, poor soldring, shortcircuits, damage, etc)

NG

OK

Check the 12C DATA andCLOCK of TUNER

* PIN48 [SCL] of LGDT3303* PIN49 [SDA] of LGDT3303 Check the path between

CPU and LGDT3303 (Incorrectinsertion, poor soldering, short


NG

OK

Check the TUNER output(VIN+, VIN-)

* VIN+* VIN- Check the path between

LGDT3303 and TUNER (Incorrectinsertion, poor soldering, short


NG

OK

Check the TUNERAGC

* PIN22(TUNER_AGC)of LGDT3303 Check the path between

LGDT3303 and Tuner(Incorrect insertion, poor soldering,

short circuits, damage, etc.)

NG

OK

Check the output of Pin46is high, also check clockand valid of LGDT3303

* PIN46(VSB_CLK) ofLGDT3303high : locklow : unlock

Replace the related parts(demodulator)

NG

OK

Check the TS DATA outputand goes to CPU

* VSB_D [7 : 0] ofLGDT3303Replace the related parts

(demodulator)

NG

Waveform 15

Waveform 16

Waveform 17

72



< Waveform 15 >

< Waveform 16 >

73





8 Remove the eight screws (M4 x 8).

7 Remove the six screws (M3 x 8).

9 Remove the connector (right → center→ left).

10 Remove the ANALOG DIGITAL EMI FILTER.

11 Remove the four screws (M3 x 8) to release

the ASSY BRKT MAIN.

Remove the Assy Brkt V-supporter L and R.

12 Remove the four screws (M5 x 12).

13 Remove the eight screws (T4 x 16).

14 Remove the five screws (M3 x 8) to release

the SMPS.

ANALOG, DIGITAL and EMI FILTER2

77

7

9

7

77

8

1314

14

14

14

13

12

14

12

8 8 8

9 9

13

11

13

11

SMPS

ASSY BRKT MAIN

75



16 Remove the screw (M4 x 10).

15 Remove the three screws (T4 x 16).

Remove the SHIELD SIDE

PDP PANEL

17 Remove the three screws (M4 x 8).

SHIELD SIDE3

15

17 16

1513

17

17

15

13

76



18 Remove the two screws to release the LED PCB.

20 Remove the eight screws (T4 x 14) to

release the SPE AKER L/R.

4

SPE AKER R SPE AKER L

18

20

2020

20

77

SPEAKERS

LED PCB



HOW TO DIAGNOSE THE PDP MODULE

HOW TO DIAGNOSE THE PDP MODULE

(PDP-NP42H5MF01PA/PB)

1. List of tools required for repair

2. Points of failure diagnosis for a Board Assy (PKG)

3. Replacement method of a Board Assy (PKG)and notes on replacement

4. Adjustments after replacement of parts in the module

5. Operation check

1. List of tools required for repair

a) Phillips screwdriver:For detaching/reattaching PKGs

b) Antistatic wrist strap:To be used when electronic components, such as PKGs, are to be handled

c) Signal generator (PC, etc.) :For voltage adjustment and display check

d)DVM:For voltage adjustment.

f ) D V M Tester:For cable check, voltage adjustment, etc.g) Cushion:To be used when the PKGs are to be replaced

Note: Be sure to wear a wrist strap when you detach/reattach PKGs (Board Assy) to protectelectronic components from being damaged by electrostatic charges.

78



Notes: • The version of a board assy (PKG) is indicated on the label on the board assy.

• When replacing the scanning relay board assys (PKG-C), make sure that the PKG-Uand PKG-D of the same version are used, to ensure correct scanning timing.

Version label of the board assy (PKG)

Digital PKG Other PKG

12

11

7

8

3 4

10

2

• Part name

• Serial number

• Version number

• Part name

• Serial number

• HW version • SW version

PART NAME

TYPE NAME VERSION

1 PKG42H5G1 03B 9S899891 1 High Voltage Board

2 PKG42H5C1 17C-08 9S890002 1 Digital Board

3 PKG42H5J7 02A 9S899895 1 Data Relay Board(Left Down)4 PKG42H5J8 02A 9S899896 1 Data Relay Board(Right Down)

5 PKG42H5J5 02A 9S899893 1 Data Relay Board(Left Up)

6 PKG42H5J6 02A 9S899894 1 Data Relay Board(Right Up)

7 PKG42H5E1 02A 9S899897 1 Scan Relay Board(Up)

PKG42H5E1 02C 9S899862 1

8 PKG42H5E2 02A 9S899898 1 Scan Relay Board(Down)

PKG42H5E2 02C 9S899863 1

10 PKG42H5E3/50X6E3 02A 9S899899 1 Scan Relay Board(Center)

11 PKG42H5J4 02A 9S899919 1 Common Connection Board

12 PKG42H5J3 02A 9S899918 1 Common Relay Board

PART NO

PARTS LIST

NOTESYMBO QTY

NP42H5MF01PA/PB

Data Relay (Left up) Data Relay (Right up)

High Voltage Board

Common Relay Board

C o m m o n C o n n e c

t i o n

Data Relay Board (left) Data Relay Board (right)

Scan Relay Board(Down)

Scan Relay Board(Up)

Digital Board

165

79



Digital Board

PKG42H5C1

01A

02A

01C

02C

02C

Scan Relay Board(Down)

PKG42H5E2

14C-07

17C-0814C-08

15C-08

16C-08

01C-07/02C-07

11C-07/12C-07

13C-07

Data Relay Board(Left Up)

PKG42H5J5

Data Relay Board(Right Up)

PKG42H5J6

Common Relay Board

PKG42H5J3

Scan Relay Board(Center)PKG42H5E3/50X6E3

Scan Relay Board(Down) should be combined with the same

version of Scan Relay Board(Up).

Scan Relay Board(up) should be combined with the same version

of Scan Relay Board(Down) .

01A/02A

01A/02A

01A/02A01A

02A

01A

Scan Relay Board(Up)

PKG42H5E1

01A

02A

01A

02A

12C-08

03B

NP42H5MF01PA/PB

Name of (board) Version Replaceable Version

03B

02A

High Voltage Board

PKG42H5G1

02A

Data Relay Board(Right Down)

PKG42H5J8

01A

01A

02A

01A

17C-08

01A/02A

01A/02A

01C/02C

01A/02A

01C/02C

02A

01A/02A

01A

Upper compatible if no terms.

Common Connection Board

PKG42H5J4

Data Relay Board(Left Down)

PKG42H5J7

NoteConditions

01A/02A02A

01A01A/02A

Compatible table of the board version

80



TROUBLE SHOOTING

Page 119-126

Model, Serial No. and Panel ID.

Procedure FOR BASIC Service TROUBLE SHOOTING

Panel Crack

OK

NG

Connectors/Cables

OK

Reproductio

V Line

Page 87 Page118

Page 92-95 Page123-126

NG

Page 82 (2)

Page 83 - 85

Page 82 (1)

Phenomenon

Exchange PDP

Reconnect orexchange

Reuse

NG

From ServiceManual of the

product

Follow the procedure below for failure diagnosis. Keep wearing Antistatic wrist Banduntil all work and testing has finished.

Power-off

Page 91 Page119-122

V Line

(Page 87-92)

Picture

H Line

81

H Line



222407145612Above Example

Model:NP42H5MF01AA

Serial No.: 408200943

NEC

MODEL NP42H5MF01408200943 MADE IN JAPANCODE AA-C3

NEC Plasma Display Corporation

Refer to the photographs below to find Model,Serial No. and Panel ID.

(1) Model, Serial No., and Panel ID

Model/Serial No.

Panel ID

Panel may be cracked due to handling during or after transportation.

(2) Panel Crack

Refer to the photographs below to check panel for crack.

82

Exercise Caution when moving a product with damaged glass.



(Caution) Take care for the cable handling. Careless handling inproduction line may cause this Failure.

(3-1) Check connectors and cables for breakage or disconnection referring to the photos below.

(3) Connectors/Cables

S c anV ol t a g eF l ex i b l e C a b l e

Data Relay Flexible Cable (UP)

Data Relay Flexible Cable (Down)

C

omm onV ol t a g eF l ex i b l e C a b l e

(3-2) Check connectors and cables whether they are connected and locked right.

See Page 114-115 for the right procedure of connection.

Data Relay Board (LU) Data Relay Board (RU)

C o m m o n C o n n e c t i o n B o a r d

Data Relay Board (LD) Data Relay Board (RD)

S c a n R e l a y B o a

r d ( D )

S c a n R e l a y B o a r d ( U )

Digital Board

Common Relay Board

High Voltage Board

83



Right Connection (Part 1)

High voltage Board( Photo)- Digital Board

Scan Relay Board (Photo)- Panel

Common Relay Board (Photo)- Panel

Locked

Unlocked

Digital Board (Photo)-High Voltage Board


High Voltage Board (Photo)-Data Relay Board

High Voltage Board (Photo)-Scan Relay Board(Photo)

Locked

Unlocked

84



Data Relay Board (Photo)


-Panel

Common Connection Board (Photo)

-Common Relay BoardHigh Voltage Board (Photo)

-Common Relay Board (Photo)

Locked

Unlocked

85



Data Relay Board (Photo)


-Panel

Common Connection Board (Photo)

-Common Relay BoardHigh Voltage Board (Photo)

-Common Relay Board (Photo)

Locked

Unlocked

86



Symptom : Vertical line Block

Horizontal Line

(Note)Typical Symptom are only shown. Another Symptom might appear.

Cause/Countermeasure:1 Failure in Scan IC on Scan Relay Board - Exchange Scan Relay Board.2 Open or contact failure of Scan Flexible Cable (CN01-CN04) at output side of Scan Relay Board (U,D)] Clean, Reconnect or exchange connector.

3 Contact failure of connector between Scan Board and Scan Relay Board] Clean, Reconnect or exchange connector.

4 Short between terminals of Scan IC due to screw dust] Clean around the terminals.

Cause/Countermeasure:1 Open or contact failure of connector between Data Relay Board

and Digital Board/High Voltage Board

] Clean, Reconnect or exchange connector.2 Open or contact failure of multiple Data flexible Cables] Clean, Reconnect or exchange connector.

3 Failure in Data Relay Board] Exchange the Data Relay Board.

4 Failure in multiple Data IC] Exchange PDP.

Cause/Countermeasure:1 Open or contact failure of Data flexible Cable] Clean, Reconnect or exchange connector.

2 Failure in Data IC] Exchange PDP.

Symptom : Horizontal lines

87



Cause/Countermeasure:1F302 open]

Exchange High Voltage Board.

Symptom:No Picture(Priming flash).

Picture Defect(Note) Typical symptom are only shown.

Another Symptom might appear.

High Voltage Board

OK: Short

NG: Open

Glass Fuse (F302)

88



Cause/Countermeasure:

2 If the connector CN7709 disconnected from Data Relay Board (RU )is short-circuited between Pin 1 (or 2) and

GND (Pin 3 or 4)] Data IC is broken]Exchange PDP.

3 If the connector CN7709 disconnected from Data Relay Board (RU) is short-circuited between Pin 5 (or 6) and

GND (Pin 3 or 4)] Data Relay Board (LU) or (RU) is failed]

a) If the connector CN7608 disconnected from Data Relay Board (LU) is short-circuited between Pin 1and GND (Pin 2 or 6)]Data Relay Board (LU) is failed]Exchange Data Relay Board (LU).

b) If the connector CN7708 disconnected from Data Relay Board (RU) is short-circuited between Pin 1and GND (Pin 2 or 6)]Data Relay Board (RU) is failed]Exchange Data Relay Board (RU).

Data Relay Board (RU)Data Relay Board (LU)

CN7709

Data Relay Board (RU)

OK: Open

NG: Short

CN7608 CN7708 CN7709

OK: Open

NG: ShortData Relay Board (RD)

Cause/ Countermeasure :

4 If the connector CN7909 disconnected from Data Relay Board (RD) is short-circuited between Pin 1 (or 2) and

GND (Pin 3 or 4)] Data IC is broken] Exchange PDP.

5 If the connector CN7909 disconnected from Data Relay Board (RD) is short-circuited between Pin 5 (or 6) and

GND (Pin 3 or 4)] Data Relay Board (LD) or (RD) is failed]

a) If the connector CN7808 disconnected from Data Relay Board (LD) is short-circuited between Pin 8

and GND (Pin 3 or 7)] Data Relay Board (LD) is failed] Exchange Data Relay Board (LD).

b) If the connector CN7908 disconnected from Data Relay Board (RD) is short-circuited between Pin 8and GND (Pin 3 or 7)] Data Relay Board(RD) is failed] Exchange Data Relay Board (RD).

CN7909

Data Relay Board (RD)Data Relay Board (LD)

CN7808 CN7908 CN7909

89



Checkpoints

PH2401FCause/Countermeasure: No Diodecharacteristic]Exchange High VoltageBoard.

PH2401F

Symptom:No Picture. (Priming doesn’t flash if W-Xerminals are short-circuited.)

High Voltage Board; Surface

High Voltage Board; Reverse

K (57~59)

L (61~64)

M (66~69)

N (71~74)

O (76~78)

P (81~84)

Q (86~89)

R (91)

S (93~96)

T (99~103)

V (107)

W (109)X (112)

J (55~56)

D (15~18)

F (33~35)

C (10~13)

A (1~4)

B (6~9)

E (24)

G (39~40)

H (49~50)

I (53)OK: Diode characteristicNG: Other than above

A-D M-LA-E N-PB-D O-PC-D Q-RE-R R-SF-N R-TG-M S-TH-I T-VI-J W-XK-L

90



Symptom:Abnormalities in a picture

Cause/Countermeasure :1 Contact failure of connector adjacent to Digital Board or short circuit due toconductive obstacle] Clean or Reconnect

2 Failure in circuit on Digital Board] Failure in Digital Board

One or more vertical bands,Multiple vertical lines

Transparent vertical band

Out of synchronization orduplication

Rectangular color shear,color discrepancy,shear in display

Mosaic

A number of lateral lines,Regular noise

91



Power off

Cause/Countermeasure:1 F301 open] Exchange High Voltage Board.2 FU801 open] Exchange Digital Board.

(Note) Typical Symptom are only shown. Another Symptom might appear.

OK: Short

NG: Open

Glass Fuse (F301)

Chip Fuse (FU801)

Symptom: No Picture(Priming doesn’t flash)] Power off

Digital Board

High Voltage Board

OK: Short

NG: Open

92



Scan Relay Board (U)

Cause/Countermeasure : If short-circuited, disconnect connector between High Voltage Board and Scan Relay Board and,

4 Short between NEGA-POSI on High Voltage Board]Exchange High Voltage Board.

5 Short between NEGA-POSI on Scan Relay Board (U)]Exchange Scan Relay Board (U).

6 Short between NEGA-POSI on Scan Relay Board (D)]Exchange Scan Relay Board (D).

Checkpoint

NEGA-POSI

OK: More than kΩNG: Short

High VoltageBoard

Checkpoint

NEGA-POSI

NEGA

NEGA

POSI

POSI

OK: More than kΩ

NG: Short

High VoltageBoard Scan Relay Board (D)

93



Fuse Resistor (R91)

Symptom: No Picture] Power off(Priming flash)

Cause/Countermeasure: R91 open] Exchange High Voltage Board.

High Voltage Board

R91 OK: About 2.2 Ω(1W)NG: Open

94



Dark and rough picture

Many light spots on dark portion

Fuse Resistor (R43),(R61)Fuse Resistor (R150)

Symptom: Failure in Writing ] Power off

Cause/Countermeasure: R43,R61 open] Exchange High Voltage Board.

Symptom: White pattern even in nosignal] Power off

Cause/Countermeasure:R150 open] ExchangeHigh Voltage Board.



R150 OK: About 4.7 Ω(2W)

NG: Open

95



(Caution) Put cushion under failed PDP to covergeneral surface of glass before laying it’s screendown.

Prepare tools.

Prepare product.

Disconnect connectors and cables on failed Board.

Detach failed Board.

Put on good Board.

Connect connectors and cables.

Disassembly

Right photo

Right photo

Page 128

Page 128

Page129-130

Follow the procedure below for diagnosis.

Page129

METHOD OF DISASSEMBLY

96



(Caution) Be careful of handling cables and connectors to avoid Failure. Be sure to take off Heat Sink before detach DataRelay Board. See Page 30 for the procedure.

Detach connectors and cables on failed Board.

C o m m o n C o n n e c t i o n B o a r d

5 c o n n e c t o r s

Data Relay Board (LD)8 connectors

Data Relay Board (LU)8 connectors

Data Relay Board (RU)9 connectors

Digital Board

7 connectors

Common Relay Board

1 connectorHigh Voltage

Board

6 connectors

Data Relay Board (RD)9 connectors

S c a n R e l a

y B o a r d ( D )




Loosen screws of failed Board and put on good Board.

S c a n R e l a y C o

n n e c t i o n B o a r d

2 s c r e w s

Data Relay Board (LD)3 screws

Data Relay Board (RD)3 screws

Data Relay Board (RU); 3 screws

Common RelayBoard15screws

Digital Board 4 screws C o m m o n C o n n e c t i o n B o a r d

9 s c r e w s

S c a n R e l a y B o a r d ( D )

2 s c r e w s


2 s c r e w s

High VoltageBoard15screws

(Caution) Be careful not to leave screwdriver, screw or screw dust. Be sure to take off Heat Sink before detach Data RelayBoard. See the next page for the procedure.

Data Relay Board (LU); 3 screws

97



Put on connectors and cables of good Board.

(Caution) Be sure to put on Heat Sink after assembling Data Relay Board.

Digital Board

7 connectors

Common Relay Board1 connector

High Voltage

Board6 connectors

Data Relay Board (LU)8 connectors

Data Relay Board (RU)

9 connectors

Data Relay Board (LD)8 connectors

Data Relay Board (RD)9 connectors

S c a n R e l a y B o a r d ( D )

5 c o n n e c t o

r s



C o m

m o n C o n n e c t i o n B o a r d


98



How to detach Heat Sink (Caution) Stress on detaching easily breaks flex cable because Data TCP is

sticking with Heat Sink (heat-conductive silicone sheet).(See Photo4)

1. Slowly swing Heat Sink back and forth.(1,2)

2. Gently lift Heat Sink up from Data TCP.(1,2)

3. Repeat1 and2 until Heat Sink is taken off.(3)

Heat Sink and Data TCP

Before detaching

1

2

3

4

Heat Sink

Reverse of Heat Sink

Heat-conductivesilicone sheet

Be careful of sticking.

Data TCP mountedon Flexible cable

99



(2) Voltage Label Check

Be sure to confirm voltages on Voltage label before conducting adjustment.

Example

Vbw : 115.2

Vsw1 : 220.2

VP : 249.8

Vsw2 : 210.1

Voltage Label

(s190.0/d70.0)115.2/220.2/249.8/210.1

*************************************408200943

Vbw Vsw1 Vp Vsw2

(1) Adjustments

Follow the procedure below.

1-1)Conduct “(3)Adjustment of Vsw1 & Vsw2”and“(4)Adjustment of Vbw& Vp”, when High Voltage Board is replaced.1-2) There is no need of adjustment if Board other than High Voltage Board.

(3) Adjustment of Vsw1 & Vsw2(Caution) Use the nearest chassis for grounding.

VR3 Vsw1

TP328 Vsw1

VR4 Vsw2

TP310 Vsw2

Vsw1 : Adjust VR3 so that the voltage between Test Pad (TP328) and GND becomes“Rated Voltage on Label ± 0.5V”.

Vsw2 : Adjust VR4 so that the voltage between Test Pad (TP310) and GND becomes“Rated Voltage on Label ± 0.5V”.

High Voltage Board

100



(4) Adjustment of Vbw & Vp (Caution) Use the nearest chassis for grounding.

VR2 Vbw

TP329 Vbw

VR1 Vp TP327 Vp

Vp : Adjust VR1 so that the voltage betweenTest Pad (TP327) and GND becomes“Rated Voltage on Label ± 0.5V”.

Vbw : Adjust VR2 so that the voltage betweenTest Pad (TP329) and GND becomes“Rated Voltage on Label ± 0.5V”.

High Voltage Board

101



Documents

PDP42_TrainingGuide