Related Manuals for LG 42" PDP SVC
Summary of Contents for LG 42" PDP SVC
- Page 1 42 Inch(Wide) Inch(Wide) Inch(Wide) PDP SVC Training Manual Inch(Wide) PDP SVC Training Manual PDP SVC Training Manual PDP SVC Training Manual LG Electronics / DND QA...
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Page 2: Table Of Contents
Contents Contents Contents Contents Ⅰ Ⅰ Ⅰ Ⅰ . Usage/Service Points to be concerned Ⅱ Ⅱ Ⅱ Ⅱ . Module formation & spec Ⅲ Ⅲ Ⅲ Ⅲ . Screen defect diagnosis 1. 4/7 or 3/7 of screen is not displayed. 2. - Page 3 PDP shall not be touched by metal or hard objects and shocked by the heat or mechanical force. be careful when disassembling or handling. be sure to wear glove for preventing injury when the glass’s broken. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
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Page 4: Service Warning
※ ※ ※ ※ With COF or panel defect, report it to LGE PDP module service department. Defect diagnosis tool 1. One DVM ( FLUKE 87 or similar type ) 2. Digital Oscilloscope ( over 200MHZ ) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... - Page 5 : 250:1 (w/o filter ; 700:1 ) Video input : CVBS Video input : CVBS Video input : CVBS Video input : CVBS LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 6 Remote Control : Included(Unified) 430(W)X78(H)X280mm(D) External Control : D-sub 25-pin connector Power Source : 110-240V , 50/60 Hz Power Consumption: 300 watts( with Max. Audio : 320W) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 7 ANALOG SET TOP BOX ( RN ANALOG SET TOP BOX ( RN ANALOG SET TOP BOX ( RN- - - - BA11 ) BA11 ) BA11 ) BA11 ) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 8 YDRV Upper B/D ASSY P300[CTRL B/D] 7 6871QDP017B PWB(PCB) ASSY YDRV Lower B/D ASSY P100[CTRL B/D] VIDEO SIGNAL 8 6871QYH015A PWB(PCB) ASSY YSUS B/D ASSY LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 9 Board ( L ) Board ( L ) Board ( L ) Local key Local key Local key Local key Main Power Main Power Main Power Main Power LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 10 SDA9410 CXA2101 CXA2101 CXA2101 CXA2101 THS8083 THS8083 THS8083 THS8083 VPC3230 VPC3230 SDA9410 SDA9410 CXA2101 CXA2101 THS8083 THS8083 VPC3230 VPC3230 SDA9410 SDA9410 CXA2101 CXA2101 THS8083 THS8083 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 11 VIDEO SWITCH Clamp H/V/CLK/ (CXA2101Q) HBLK/VBLK MEMORY Y,U,V,H,V (4M-BYTE) Y,Pb,Pr(MNT) Y,Pb,Pr(STB) PORT EXP (74HCT373) (M62320X3) AUDIO MICOM AUDIO AMP Sound Processor LA4282(L&R) MSP3401G) EEPROM (AT29C010) X2416P LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 12 외부입력 외부입력 CVBS MS81V04160 FRAME MEMORY V, L/R VPC3230D 외부입력 외부입력 외부입력 외부입력2 (MAIN) DVD_Y LGTV1001 Vido Proessor MNT_OUT Y,Cr,Cb (DVD) Y,Pb,Pr(DTV) DVD/DTV (RCA JACK) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 13 (when connecting 25 Pin cable, Connect external equipment to STB) Connect external equipment to STB) Connect external equipment to STB) Connect external equipment to STB) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 14 Board EMI Filter EMI Filter EMI Filter EMI Filter Y Y Y Y - - - - Drive (Bottom) Drive (Bottom) Drive (Bottom) Drive (Bottom) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 15 EMI Filter POWER BOARD POWER BOARD VSC BOARD VSC BOARD EMI Filter EMI Filter POWER BOARD POWER BOARD BACK COVER BACK COVER BACK COVER BACK COVER LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 16 BOARD X X X X - - - - BOARD BOARD BOARD BOARD Y Y Y Y - - - - BOARD BOARD BOARD BOARD LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 17 VSC Board(Front) Y Y Y Y - - - - Drive Board Drive Board EMI Filter EMI Filter Drive Board Drive Board EMI Filter EMI Filter LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 18 Board ( Right) X X X X - - - - Board ( Left ) Board ( Left ) Board ( Left ) Board ( Left ) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 19 Power Board ( SMPS ) Power Board ( SMPS ) Power Board ( SMPS ) Power Board ( SMPS ) Power well power Board-Korean market Murata Power Board LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 20 Right X B/D ↔ right 3/7 of screen Left X B/D ※ ※ ※ ※ type i) screen’s left(4/7) ii) Screen’s right(3/7) Displaying part Non-displaying part LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 21 ※ ※ ※ ※ Data COF IC test method pattern( GND ) to ANODE, Pattern (resistance joint part ) to CATHOD, Test diode forward and backward. Measure ③ resistance value.(10Ω) resistance LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
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Page 22: Data Cof Ic Unit Error Pattern
4 IC errors in one COF <case 4> Data COF IC unit error in the whole X B/D <case 5> Data COF IC unit error in the whole screen. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... - Page 23 ↔ right 3/7 of bottom screen Left X B/D ※ ※ ※ ※ case Partial error or total error with One or more ICs defect. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
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Page 24: The Screen By Scan Cof Is Not Displayed
※ ※ ※ ※ SCAN IC check Set Vpp Pin to ANODE, GND pin to CATHOD and test diode forward and backward. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... -
Page 25: Vertical Data Copy
<pattern supposed to display> <case 1 : total copy> <case2 : partial- top copy> <case 3 : partial- bottom copy> <case 4 : total copy> LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... - Page 26 - SCAN IC attached to panel itself defect 3) Replace Y DRV B/D ※ ※ ※ ※ case Not always like this. There can be several horizontal lines LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
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Page 27: Input Signal Pattern Is Displayed But The Whole Brightness Of Screen Is Dark
- Z B/D measurement point : panel connection part ( SUS_OUT ) 230V 15µs Vsetup 175V setup 25µs 175V 20µs setdown 230µs Z RAMP voltage wave Y output voltage wave LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... -
Page 28: In Full White Pattern, The Brightness Is Getting Darker Toward The Center
※ ※ ※ ※ case 13. A specific brightness of one color is not clear. 1) Check CTRL B/D’s input signal connector. 2) Replace CTRL B/D. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr... - Page 29 < A: Y B/D output waveform - 1 FRAME > < B: Y B/D output waveform - 1 SF > < B: Y B/D output waveform - 2 SF(non-Setup SF) > LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 30 < X B/D output waveform - 1 FRAME > < X B/D output waveform - 1 SF > < X B/D output waveform - amplification > LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 31 Guide Guide Guide ” ” cause : bad connection between Y-Board # 1, 2 drive board Connector pin Rework should be done Y-Driver Board Y-Board LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 32 (bend the wire to Y-Driver B/D not ② to Y-B/D . If not there can be noise) ① •Don’t be confused with Pin number ② •Improved since Dec,2001. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 33 See the picture precisely and then connect jump wire at the exac See the picture precisely and then connect jump wire at the exact point t point t point t point LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 34 Dec,2001. 1) see working instruction(revised since Dec,2001. 1) see working instruction(revised since Dec,2001. 1) see working instruction(revised since Dec,2001. 1) normal normal normal normal LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 35 Be sure to use rated fuse. Be sure to use rated fuse. Be sure to use rated fuse. Fuse 15 A Fuse 15 A Fuse 15 A Fuse 15 A LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 36 When the power is not off,replace the related board. When the power is not off,replace the related board. When the power is not off,replace the related board. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 37 Controller Board. Controller Board. Controller Board. Troubleshooting : replace VSC Board Troubleshooting : replace VSC Board Troubleshooting : replace VSC Board Troubleshooting : replace VSC Board LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 38 Y Y Y Y - - - - Drive Board ( Bottom ) Drive Board ( Bottom ) Drive Board ( Bottom ) Drive Board ( Bottom ) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 39 Troubleshooting : Y Troubleshooting : Y Troubleshooting : Y Troubleshooting : Y- - - - Drive Board replacement Drive Board replacement Drive Board replacement Drive Board replacement LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 40 501 Connector contact point defect, Various defect symptoms can be seen) Various defect symptoms can be seen) Various defect symptoms can be seen) Various defect symptoms can be seen) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 41 Slight noise is not a defect and write down explanation Slight noise is not a defect and write down explanation Slight noise is not a defect and write down explanation LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 42 X X X X - - - - Board ( Left ) replacement Board ( Left ) replacement Board ( Left ) replacement Board ( Left ) replacement LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 43 X X X X - - - - Board ( Left ) replacement Board ( Left ) replacement Board ( Left ) replacement Board ( Left ) replacement LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 44 X X X X - - - - Board ( Right ) replacement Board ( Right ) replacement Board ( Right ) replacement Board ( Right ) replacement LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 45 X X X X - - - - Board ( Right ) replacement Board ( Right ) replacement Board ( Right ) replacement Board ( Right ) replacement LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 46 Be sure not to bend it by force or internal Insulated conductor can be down. Insulated conductor can be down. Insulated conductor can be down. Insulated conductor can be down. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 47 COF Connector is attached to Module. When COF Connector is broken, Module ASS’Y must be replaced a new one. broken, Module ASS’Y must be replaced a new one. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 48 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 49 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 50 In case Z-Board is assembled, it’s really hard to separate. Be careful not to tear COF Connector. If COF Connector is torn, replace a new Module Assembly LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 51 5) Connector separation Guide Push LOCK and pull out PUSH PUSH PUSH PUSH PULL PUSH LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 52 6) Control Board & VSC Board Connector LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 53 Be sealed up after gas injection Be careful to handle the sealed-up part after gas injection. Warning Warning If it is broken, the gas escapes. So, replace the Module. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 54 When the load voltage is short. Power Board Change When each voltage doesn’t work (in general) When each voltage doesn’t work (in general) Power Board Change LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 55 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 56 But the problem still remains and check the connector between X-BOARD and CONTROL BOARD. And if you can’t find defect, check CONTROL. Bottom Left Bottom Right LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 57 11) One Point Service Guide Symptom : B color 1 Address line Open Cause : Dented COF COF is dented LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 58 ( 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 59 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA...
- Page 60 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 61 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 62 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 63 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 64 X-Board is open. 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 65 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 66 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 67 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 68 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 69 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 70 Examples Examples Examples Examples LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 71 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 72 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 73 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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 74 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 75 Examples Examples Examples Examples IC201(VPC3230D) Decoder is inferior LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 76 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 LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 77 (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. LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 78 ▶ the output of inferior line less than that of the normal Line Add. COF Drive IC inferior ▶ COF inspection검사기 : 24V Open check (normal 50V) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...
- Page 79 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) LG Electronics/DND QA LG Electronics/DND QA Gr LG Electronics/DND QA LG Electronics/DND QA Gr Gr...