PDP One Point Repair Guide ~ 42 Inch Practice Inch Practice

Transcription

1 PDP One Point Repair Guide ~ 42 Inch Practice Inch Practice

2 P6 cause : bad connection between Y-Board # 1, 2 drive board Connector pin Rework should be done P4 Y-Driver Board Y-Board

3 P 6 P 4 amplified amplified : outside Leg : inside Leg P 6, P 4 both are the first pin, when wiring, it should be done as picture shown. (bend the wire to Y-Driver B/D not to Y-B/D. If not there can be noise) Don t be confused with Pin number Improved since Dec,2001.

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18 1) X - Board COF Connector separation Lift up the right and left of X-BOARD CONNECTOR. Lift up X-BOARD CONNECTOR and separate COP CONNECTOR by pulling up. When you handle COF CONNECTOR, don t pressure. First release LOCK and separate. If COF CONNECTOR is damaged, you should replace MODULE ASS Y. So, be aware of this!! COF Connector Warning When you exchange X-Board, first you should separate COF Connector. Be careful to to handle it. it. COF Connector is is attached to to Module. When COF Connector is is broken, Module ASS Y must be be replaced a new one.

19 2) X - Board Connector separation Lift up each edge of left/right. Lifted condition Be careful to handle LOCK or it can be broken. When LOCK is broken, replace a new X-BOARD. Warning It s easy to separate it by releasing Connector Lock. Do not pressure or it can be hurt. When LOCK is hurt, replace a new X-BOARD

20 3) Y - Board COF Connector separation Pull the white LOCK as shown in arrow Pull the white LOCK as shown in arrow. Separate COF CONNECTOR by pulling in the left. Warning Be careful to handle LOCK and COF Connector. When LOCK part is damaged, you should replace a new Y-Board. In case of COF Connector, Module Assembly.

21 4) Z - Board COF Connector separation Separate the fixed Screw of Z-Board. Pull out Lock as shown in arrow. Warning Condition in Lock part is pulled Be careful not to tear COF Connector. If COF Connector is torn, replace a new Module Assembly COF Connector Pull COF Connector as shown in arrow. It s easy to separate COF on condition that Z-Board Screw is separated. In case Z-Board is assembled, it s really hard to separate.

22 5) Connector separation Guide Push LOCK and pull out PUSH PUSH PUSH PUSH PUSH PULL

23 6) Control Board & VSC Board Connector

24 7) Gas injection (Sealing up) condition Be sealed up after gas injection Be sealed up after gas injection Warning Be careful to handle the sealed-up part after gas injection. If it is broken, the gas escapes. So, replace the Module.

25 8) Power off in 2 ~ 3 minutes(protection) Power Power is is On On and and off off 2~3 2~3 minutes. (Protection) P301 P301 Connector Open Open Check. Check. OK X --Board Board Top Top Right Right Change. P302 P302 Connector Open Open Check Check OK X --Board Board Top Top Left Left Change. P303 P303 Connector Open Open Check Check OK X --Board Board Bottom Right Right Change. P304 P304 Connector Open Open Check Check OK X --Board Board Bottom Left Left Change. P102 P102 Connector Open Open Check Check OK Z --Board Board Change. P3, P3, P2 P2 Connector Open Open Check Check OK Y --Board Board Change. P005, P005, P003 P003 Connector Open Open Check Check OK VSC- VSC-Board Change. PROTECT operation; When the load voltage is short. P006 P006 Connector Open Open Check Check OK VSC VSC --Board Board Change. Sound Sound Output Output IC IC Short Short Check Check When each voltage doesn t work (in general) Power Power Board Board Change

26 9) Power off in 2 ~ 3 minutes(protection) L813 Cold Solder Symptom : As soon as the power on, it s off in 2-3minutes. (PROTECT operation) Cause : No VS voltage L813 Coil cold soldering. Check Check Open the Connector connecting to each Board to check the power is off. if each Board is same, check the Power Board and voltage.

27 10) ADD BAR inspection and repair Press the ADJ KEY and check the position of add bar by changing WHITE or RED or BLUE or GREEN HEATRUN : WHITE Top Right Bottom Right Top Left Bottom Left MP-40PA10 uses 4 board such as left,right, top and bottom. Divide the screen in 4 and once you see ADD BAR check COF CONNECTOR between MODULE and X-BOARD. If there is no defect in COF CONNECTOR replace X-BOARD. But the problem still remains and check the connector between X-BOARD and CONTROL BOARD. And if you can t find defect, check CONTROL.

28 11) One Point Service Guide Symptom : B color 1 Address line Open Cause : Dented COF COF is dented

29 Symptom : Inferior R Address color Cause : Inferior DATA output by cold soldering 16 pin of IC14 in X-L-TOP ( Normal waveform after tearing off IC Pin) Countermeasure : Replace X-L-TOP board. IC14 Cold Soldering Abnormal waveform by cold soldering Normal waveform after tearing off IC pin

30 Symptom Causes Countermeasure If 15V line voltage reduces below 14V, Mis-discharge occurs and power off because of protection circuit. Replace PSU (Power Supply Unit) and defective X-Board. Defective X-Board The blue spreads on the screen (Mis-discharge) and power off in 2 ~ 3 seconds. If you turn on again, it will be same problem. Check Check If when Power on, screen shows like above and turn off in 2 seconds, check if turning off or not by disconnecting all X & Y boards.

31 Symptom Cause Countermeasure No 5V supply to Top right X-Board. Connect 5V line The top left part of screen is broken (Top Right X-BOARD) Check Check Check Top right X-BOARD 5V.(If 0V, it happens) Check 5V line from SMPS to X-BOARD.

32 Symptom Cause Countermeasure No Va(70V) supply to Top right X-Board. Connect 70V line Pinkish screen in the top left. (Top right X-BOARD) Check Check Check Top right X-BOARD Va(70V).(If 0V, it happens) Check 70V(Va) line from SMPS to X-BOARD.

33 Symptom Cause Countermeasure No 12V supply to Top right X-Board. No Va(70V) supply to Top right X-Board. Connect 12V line Connect 70V line The 3/5 top left in the screen is blank (Top Right X-BOARD) Check Check Check Top right X-BOARD 12V.( If 0V, it happens ) Check Top right X-BOARD Va(70V).(If 0V, it happens) Check 12V & 70V(Va) line from SMPS to X-BOARD.

34 Symptom Cause Countermeasure No 12V supply to Top left X-Board. No Va(70V) supply to Top left X-Board. Connect 12V line Connect 70V line The 3/5 top right of the screen is blank. (Top left X-BOARD) Check Check Check Top left X-BOARD 12V.( If 0V, it happens ) Check Top left X-BOARD Va(70V).(If 0V, it happens) Check 12V & Va(70V) line from SMPS to X-BOARD.

35 Symptom Cause Countermeasure P1 COF connector on Top left X-Board is open. Reassemble it Pinkish screen in the 1/5 top right (Top left X-BOARD) Check Check Check the contact point and Locking of P1 on Top left X-BOARD.

36 Symptom Cause Countermeasure No 5V supply to bottom right X-Board. Connect 5V line The 3/5 bottom left of screen is broken. (BOTTOM RIGHT X-BOARD) Check Check Check Bottom right X-BOARD 5V.( If 0V, it happens ) Check 5V line from SMPS to X-BOARD.

37 Symptom Cause Countermeasure No 12V supply to bottom right X-Board. Connect 12V line No Va(70V) supply to bottom right X-Board. The 3/5 bottom left of the screen is Blank. (Bottom Right X-BOARD) Check Check Check Bottom right X-BOARD 12V.( If 0V, it happens ) Check 12V line from SMPS to X-BOARD.

38 Symptom Cause Countermeasure No 5V supply to bottom left X-Board. Connect 5V line The 2/5 right of the screen is broken. (Bottom left X-BOARD) Check Check Check Bottom left X-BOARD 5V.( If 0V, it happens ) Check 5V line from SMPS to X-BOARD.

39 Symptom Cause Countermeasure No 12V supply to bottom left X-Board. Connect 12V line The 2/5 right part of the screen is blank. (Bottom left X-BOARD ) Check Check Check Bottom left X-BOARD 12V.( If 0V, it happens ) Check 12V line from SMPS to X-BOARD.

40 Symptom Cause Countermeasure The connecting of X-Board bottom left connector is bad. Reassemble it. ADDRESS bar appears in the right bottom of the screen. (X-BOARD BOTTOM LEFT) Check Check Check connecting of the connector of bottom left X-BOARD. Reassemble it. X-BOARD BOTTOM LEFT CONNECTOR OPEN.

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42 Symptom Cause Countermeasure Connector(P13) is OPEN or Connecting condition is bad Reassemble P13. Screen is divided in top and bottom, and vertical bar appears. Check Check P13 CONNECTOR contact point inferior CHECK. P13 CONNECTOR SIGNAL CHEK. P13 CONNECTOR

43 Symptom Cause Countermeasure VSC Board Connector is Open. Reassemble VSC Board Connector Screen is broken and has the vertical/horizontal bar. Check Check Check the connector connecting Reassemble the Connector

44 Symptom Cause Countermeasure Loose VSC Board Connector Reassemble VSC BOARD Connector The screen is bluish(mosaic screen) Check Check Check the connection condition of the Connector. Reassemble the Connector.

45 Symptom Cause Countermeasure Bad IC203 Replace IC203(VPC3230D) The mosaic appears in the screen when it connects to VIDEO Input. (The sensibility of Y-signal is low.) When connected to Component Input, it is O.K. Check Check Check if X201 on VSC board oscillates. Check Video In/Out of IC203 on VSC board. IC201 (VPC3230D) Decoder IC

46 IC201(VPC3230D) Decoder is inferior

47 Symptom Cause Countermeasure Bad Connector connecting Control Board and VSC B/D. Change the Connector Abnormal Normal Noise with division of colors Check Check Contact point and signal condition of Connector Control Board and VSC Board. Bad Connector

48 Name No signal Vertical Bar Symptom Cause and Countermeasure 1.Cause : Bad IC2 (DA1) IC2 DA1(Data Arrange) No.162 Pin output is changing depending on the temperature. abnormal X-B d Buffer IC * Room temperature : 2.5V Output (Normal Pin = over 2.8V) * Heated : 1.5V Output(Normal Pin = 2.7V ) Bad IC2 (DA1) 2. Countermeasure : Replace IC2 < Waveform of normal pin> heated < Waveform of abnormal pin > heated 8cm DA1 DA1 Realization Buffer Buffer When ASIC Chip(IC2 DA1 LGD4001) on Control Board gets high temperature, you can observe it (In normal temperature it s O.K. ) Buffer(74ACT541) waveform abnormally narrows. In this case, it is impossible for Flip Flop(74AC574) on X B/D to read data.

49 Name Add Open (Green 1 Line) Symptom Cause and Countermeasure 1.cause: Add. COF Drive IC inferior Add. COF Drive IC Normal Line Data waveform Open Line Data output waveform the output of inferior line less than that of the normal Line Add. COF Drive IC inferior COF inspection : 24V Open check (normal 50V)

50 Name Vertical bar when Power off/on(mis-discharge) Symptom Cause and Countermeasure 1.Cause : Control board malfunctions when Power off/on. 2.Countermeasure: Change some parts on Control board. 3.Changing parts : A32_CTRL_03 B/D (Marked on PCB) -.R14,17,18,21 : 330 ==> 4.7K (Chip Resistor) -.R15,16,19,20 : 22K ==> 4.7K (Chip Resistor) -.C504, 505 : 0.1uF / 50V add (Chip Capacitor) Control board Realization 1.PDP Power on Mode external input (regardless of wire/wireless signal but it s easy to reenact in wireless signal) 2. Remove Power Cord (Power s off) 3.after about 20minutes, insert Power cord (automatically the Power s on and the vertical bar is shown as above)

51 <SMPS Board> TP5 GND When replacing PDP module & power board, Be sure to adjust Power Ass y voltage. VA Adjust VR8401 TP6 VA VS Adjust VR8501 TP3 GND TP4 VS ++ DMM PFC + PFC - 380V 1V VR801 PFC PACK 1. PFC adjustment -. Select 100% White Pattern signal and warm it up enough. -. Connect DMM with TP PFC+ and TP PFC (GND). -. adjust VR801 to 380V (within 1V ). 2. Va adjustment -. Connect DMM + terminal with P814 #1 Pin. -. Turn VR8401 (Va Adj) to adjust the voltage on DMM to Va voltage value marked on panel bottom- right label. (allowable error : 0.5V ) 3. Vs adjustment -. Connect DMM s + terminal with P803 # 9 Pin. -. Turn VR 8501 (Vs Adj )to adjust the voltage on DMM to Vs voltage value marked on panel bottom-right label.

52 Power & no Raster AC input check (220V) Connection Plug with set When Main S/W ON, ST-BY LED ON check (RED) AC Line Fuse check When SUB S/W on, LED GREEN check PFC Board R8301,R8302 R8303 OPEN check R8301,R8302,R8303 replacement R8538, R8539,R8540 OPEN check FAN function check 5V MONI, 5V CTL output check VS, VA PACK Function check Controller Board VS ON check Controller Board replacement each Connector & connection check

53 Connector between SP & set check IC601 (MSP3401) check IC603 (LA4282) check Input jack check (25Pin cable L,R input check) Sound power (P806A,B) Cable connection check Sound terminal Voltage check (32V) F8811 Fuse Open check Speaker connection line check

54 Abnormal screen PC signal input IC501 ( JAGASM check ) IC203 ( CXA2101 ) check IC901 (SII 150 ) check) IC406 ( ADV 7123 ) check P901 ( 21 Pin cable ) check IC404 ( FLI2220 ) check IC403 ( FLI2220 )check IC201 (VPC3230 ) check Input jack & Connector check

55 AC power voltage check Main Power S/W check F8301 Fuse (15A) check F8301 Fuse (15A) replacement F8302 Fuse check

56 Disappearing or error while watching

57 Automatic off as soon as power is on ( Protect ) X - Board

58 Automatic off as soon as power is on ( Protect ) Y - Board

59 X-Board Connector check X-Board replacement Module ( Panel )replacement

60 X-Board Connector check X-Board replacement Module ( Panel )replacement

61 Y-Drive Board ( Top ) Drive IC check Y-Drive Board replacement

62 Y-Drive Board ( Bottom ) Drive IC check Y-Drive Board replacement

63 Y-Drive Board ( Top ) Drive IC check Y-Drive Board replacement

64 VSC Board & Controller Board Connector check Controller Board check Controller Board replacement

65 Address Bar ( Vertical ) & partial no-picture Central top 4/10 of the screen with vertical bar related X-Board power supply voltage check Central top 4/10 of screen with no-picture related X-Board Connector check related X-Board & Controller Board Connector check related X-Board replacement Module (Panel ) check

66 Address Bar ( Vertical ) & partial no-picture Bottom left 3/10 of the screen with vertical bar Related X-Board power supply voltage check Bottom left 3/10 of the screen with no-picture Related X-Board Connector check Related X-Board & Controller Board Connector check Related X-Board replacement Module (Panel ) check

67 Address Bar ( Vertical ) & partial no-picture Bottom right 3/10 of the screen with vertical bar Bottom right 3/10 of the screen with no-picture related X-Board power supply voltage check Related X-Board Connector check Related X-Board & Controller Board Connector check Related X-Board replacement Module (Panel ) check

68 Address Bar ( Vertical ) & partial no-picture Central bottom 4/10 of the screen with vertical bar Related X-Board power supply voltage check Central bottom 4/10 of the screen with no-picture Related X-Board Connector check Related X-Board & Controller Board Connector check Related X-Board replacement Module (Panel ) check

69 Address Bar ( Vertical ) & partial no-picture Related X-Board power supply voltage check Related X-Board Connector check Related X-Board & Controller Board Connector check Related X-Board replacement Module (Panel ) check

70 Address Bar ( Vertical ) & partial no-picture Related X-Board power supply voltage check Related X-Board Connector check Related X-Board & Controller Board Connector check Related X-Board replacement Module (Panel ) check