LG 42PC55 Service Manual
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LG 42PC55 Service Manual

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See also: Owner's Manual
PLASMA TV
SERVICE MANUAL
CHASSIS : PD73A
MODEL : 42PC55
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
42PC55-ZB

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Summary of Contents for LG 42PC55

  • Page 1 PLASMA TV SERVICE MANUAL CHASSIS : PD73A MODEL : 42PC55 42PC55-ZB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ..................3 SPECIFICATIONS ....................4 ADJUSTMENT INSTRUCTIONS .................6 TROUBLE SHOOTING GUIDE ................19 BLOCK DIAGRAM .....................28 EXPLODED VIEW ....................30 EXPLODED VIEW PARTS LIST ................31 REPLACEMENT PARTS LIST................32 SCHEMATIC DIAGRAM..................PRINTED CIRCUIT DIAGRAM ................

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Specifications

    Chassis Model Name Market Brand Remark PD73A 42PC55-ZB UK, German, Italy, France, Sweden, Finland, Spain Specification Each part is tested as below without special appointment. 1) Temperature : 25±5°C (77±9°F), CST : 40±5 2) Relative Humidity: 65±10% 3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz) * Standard Voltage of each product is marked by models.
  • Page 5 2. Model General Specification Item Specification Remark Market UK, German, Italy, France, Sweden, Finland, Spain Broadcasting system 1) PAL-BG 2) PAL-DK 3) PAL-I,I’ 4) DVB-T(ID TV) 5) SECAM-L/L’ Receiving system Analog : Upper Heterodyne Digital : COFDM Scart Jack (2EA) PAL, SECAM Video Input (1EA) PAL, SECAM, NTSC...

  • Page 6: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS 1. Application Object Each PCB assembly must be checked by check JIG set. These instructions are applied to all of the 42” PLASMA TV, (Because power PCB Assembly damages to PDP Module, PD73A Chassis. especially be careful) 5. POWER PCB Assy Voltage 2.
  • Page 7 6. EDID (The Extended Display 6-4. Sequence of Adjustment - EDID Download Identification Data)/ DDC (Display 1) Init the data. Data Channel) download 6-1. Required Test Equipment 1) Adjusting PC with S/W for writing EDID Data.(S/W : EDID TESTER Ver.2.5) 2) A Jig for EDID Download 3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub 15Pin cable, DVI to HDMI cable...
  • Page 8 - EDID DATA 1. Product ID 1) Analog RGB. Model Product ID Product ID Name EDID table 40114 9CB2 B29C 42PC55-ZB 40116 42PC56-ZD 9CB4 B49C 50016 50PC55-ZB C360 60C3 50018 50PC56-ZD C362 62C3 50020 50PB56-ZA C364 64C3 2. Serial No : Controlled on production line 3.
  • Page 9 7. ADC Calibration 9-3. Method of Auto Component Color Balance 1) Input the Component 720p/50Hz 7 Color Bar(MSPG-925FS model:215, pattern:65) signal into Component. RF/AV/S-VIDEO Component RGB-PC 2) Set the PSM to Dynamic mode in the Picture menu. Model : 3 3) Press IN-STAR key on R/C for adjustment.
  • Page 10 11. Adjustment of White Balance Auto adjustment Map(RS-232C) Type PD61A/C 11-1. Requirement Baud Rate Data bit Stop bit Parity Before adjusting White-balance , the AV ADC should be done. 115200 NONE 11-2. Required Equipment Index Cmd1 Cmd2 Data Min Value Max Value 1) Remote controller for adjustment.
  • Page 11 Baud Rate & Download value change) Model Tool Area Tool Option1 Option2 Option3 Option3 Name Option1 Option Option2 42PC55-ZB 2048 1697 (Fig. 8) Default on OSD 50PC55-ZB 2052 1953 50PB65-ZA 2244 1977 15-2. Push the menu button in DTV mode.
  • Page 12 (2) Check the Serial Number. 3) Install LGIDS-2 1. You can find the ICON on C:\Program Files\LGIDS. 16. Input the Shipping Option Data 1) Push the IN-START key in a Adjust Remocon. 2) Input the Option Number that was specified in the BOM, into the Shipping area.
  • Page 13 3) Execute the LGIDS Program - 1 5) Execute the LGIDS Program - 2 1. Check a ‘PDP’ & ‘Hurricane’ on the ‘Model’ MENU 1. Open a Batch file, RAM file and Flash file. 6) Execute the LGIDS Program - 3 * If your connection is ‘NG’, then set your PORT(COM1,2,3...) correctly.
  • Page 14 17-2. CORTEZ Download By GProbe 5 3) Install GProbe5.0.0.15.EXE - 2. (1) Installation of the GProbe 5 1) Extract to folder GProbe5.0.0.15_S0006_EXE_09A.ZIP. 2) Install GProbe5.0.0.15.EXE - 1. 4) Install GProbe5.0.0.15.EXE - 3.
  • Page 15 5) Install GProbe5.0.0.15.EXE - 4. 2) Connect TV set and PC by using RS232 cable. 3) SVC MENU Setting for CORTEZ DOWNLOAD. case 1. Press the ‘tilt’ button on the Adjustment Remote Control. case 2. Press the ‘ADJ’ button. 1) Press the ‘System Control 2’ menu 2) Enter the ‘GProbe’...
  • Page 16 18-1. Insert the ‘Tool Option’ 1) Insert ‘2048’ on ‘Tool Option1’, ‘1697’ on ‘Tool Option2’ for 42PC55-ZB Press the ‘ENTER’ Button. 2) Insert ‘2052’ on ‘Tool Option1’, ‘1953’ on ‘Tool Option2’ for 50PC55-ZB Press the ‘ENTER’ Button.
  • Page 17 1) Extract to folder lgterm.zip. 6) Insert ‘dn’ and Enter. (2) Download biz file using LG Term 1) Prepare the ‘ *.biz ‘ that you want to download on ST. 2) Connect TV set and PC by using RS232 cable, Turn on the TV.
  • Page 18 7) When ‘Please Send the file’ appears, Press ‘ctrl’ + ‘s’. 10) The End of DOWNLOAD 1. After Download successfully, you can see ‘EW EW EW EW. 2. You can remove RS232 Cable and TV Power SET OFF => ON 8) When ‘Please Send the file’...

  • Page 19: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE 1. Power Board 1-1. The whole flowchart which it follows in voltage output state Start check Is it identical Doesn't the Is the Interface screen whole come with Power Off signal operated? out? condition? 1. Check the Power Off 2.
  • Page 20 1-2. 42” Power Board Structure (1) Pin Layout (2) Pin Spec AC INLET ANALOG & DIGITAL BOARD PDP MODULE READY AC Det 3.4V RL-ON 3.4V STB 5V Vs-ON 5V Det M5V-ON 3.4V STB 5V 3.4V-ON Wafer P/N SMW250-013P SMW250-13P SMW250-10P SMW250-12P YH396-08V YH396-09V...
  • Page 21 2. No Power (1) Symptom 1) Doesn’t minute discharge at module. 2) Non does not come in into the front LED. (2) Check following Is plug in power cord? Plug in power cord. Is the Line Filter and Power Connect the Cable. Board Cable connected? Is the Fuse(F101) on Replace the Fuse.
  • Page 22 3. Protect Mode (1) Symptom 1) After once shining, it does not discharge minutely from module. 2) The Rely falls.(The sound is audible “click”) 3) It is converted with the color where the front LED is red from green. (2) Check following Is the Power Board Is output the normality Low/High Replace Power...
  • Page 23 4. No Raster (1) Symptom 1) No OSD and image occur at screen. 2) It maintains the condition where the front LED is green. (2) Check following Does minute discharge Is output the normality Replace the Power Is the VAVS on? Low/High voltage except At Module? board...
  • Page 24 5. In case of occurring strange screen into specific mode 5-1. In case the OSD does not displayed (1) Symptom 1) LED is green. 2) The minute discharged continuously becomes Accomplished from module. (2) Check following Is the LVDS cable Is the LVDS cable Replace the cable.
  • Page 25 5-2. In case of does’t display the screen into specific mode (1) Symptom 1) The screen does not become the display from specific input mode (RF, AV, Component, RGB, DVI). (2) Check following 1) Check the all input mode should become normality display. (3) In case of becomes unusual display from RF mode Is the Input voltage, IIC Communication Is the Tuner normal?
  • Page 26 (5) In the case of becomes unusual display from Component, RGB mode Is theR,G,B input and H,V Check the input source Sync of the J1100 normal? Same as Block A (6) In the case of becomes unusual display from HDMI mode Is the Input and Output signal,IIC Is the HDMI002(IC1004) Replace the IC.
  • Page 27 6. In case of no sound (1) Symptom 1) LED is Green. 2) Screen display but sound is not output. (2) Check following All input(mode) is no Is the speaker On it Set on speaker in menu. sound? menu? Download Only HDMI is No Is the speaker Cable Check the Speaker...

  • Page 28: Block Diagram

    BLOCK DIAGRAM...
  • Page 29 MEMO...

  • Page 30: Exploded View

    EXPLODED VIEW...

  • Page 31: Exploded View Parts List

    Hand Insert PCB Assembly, Sub SUB M.I PD73A 42PC5D - 42PC5D IR/LED EAY32808901 SMPS, AC/DC YPSUJ014A 100VTO240V 400W 50 TO 60HZ UL/CSA/CE/TUV 42INCH XPOWER DISPLAY PSU LG.. EAM35012703 Filter, AC Line IF2-N06CEWL2 5.3mH 250VAC 6A 0.22uF 1000pF VDE/CSA/K/CCC 450/130MM CORE ADDTION..

  • Page 32: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 03. 02. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CAPACITORs C1135 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C1136 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R 0CH3104K566 0805B104K500CT 100nF 10% 50V X7R C114 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R...
  • Page 33 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C129 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C1356 0CC101CK41A C1608C0G1H101JT 100pF 5% 50V C0G C130 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C1357 0CC221CK41A C1608C0G1H221JT 220pF 5% 50V C0G C1300 0CK105DH56A C2012X7R105KFT 1uF 10% 25V X7R -5...
  • Page 34 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1449 0CK225DFK4A C2012Y5V1C225MT 2.2uF 20% 16V Y5V C185 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C145 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C186 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C1450 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R...
  • Page 35 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C308 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C605 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C309 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C606 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C310 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R...
  • Page 36 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C728 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C785 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C729 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C786 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C730 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R...
  • Page 37 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C866 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R D1000 0DD184009AA KDS184 KDS184 TP KEC - 85V - - - C867 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R D1001 0DD184009AA KDS184 KDS184 TP KEC - 85V - - - C868...
  • Page 38 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC1101 0IPH741400E 74HC14D 2TO6V 0.002mA SCHMITT TRI L1104 6210TCE001G HH-1M3216-501JT 500OHM 3.2X1.6X1. IC1102 0IPRP00009A ICL3232CBNZ 3VTO5.5V - SSOP R/TP L1105 6210TCE001P HB-1S2012-121JT(H:1mm) 120OHM 2X1 IC1104 0ITO741570C TC74LCX157FT 2TO3.6V 0.01mA MULTI L1106 6210TCE001P...
  • Page 39 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION X700 6212AB2015J Crystal, HC-49SM 19.66080HZ 19.6608HZ 30PP Q503 0TR387500AA 2SC3875S(ALY) NPN 5V 60V 50V 150M L100 0LC2232101A Inductor, FI-D3216-223KJT 22UH 10% - 25MA 1 Q504 0TR150400BA 2SA1504S(ASY) PNP -5V -50V -50V - L109 0LC1032101A...
  • Page 40 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION AR701 0RZZH033273 MNR04M0ABJ330 33OHM 5% 1/16W 4 SM R1040 0RJ4702D677 MCR03EZPJ473 47KOHM 5% 1/10W 1608 AR702 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W 4 SMD R1041 0RJ4702D677 MCR03EZPJ473 47KOHM 5% 1/10W 1608 AR702 0RZZH033273 MNR04M0ABJ330 33OHM 5% 1/16W 4 SM...
  • Page 41 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1119 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R1209 0RJ3002D677 MCR03EZPJ303 30KOHM 5% 1/10W 1608 R112 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R121 0RJ1202D677 MCR03EZPJ123 12KOHM 5% 1/10W 1608 R1120 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160...
  • Page 42 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R128 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 R1348 0RJ0392D677 MCR03EZPJ390 39OHM 5% 1/10W 1608 R1280 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R1349 0RJ0392D677 MCR03EZPJ390 39OHM 5% 1/10W 1608 R1281 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608...
  • Page 43 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1436 0RJ1201C678 MCR01MZPJ122 1.2KOHM 5% 1/16W 100 R1708 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W 1608 R1438 0RJ1201C678 MCR01MZPJ122 1.2KOHM 5% 1/16W 100 R1709 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R1439 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005...
  • Page 44 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1768 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R225 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R1769 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R226 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R177 0RJ0472C678 MCR01MZPJ470 47OHM 5% 1/16W 1005...
  • Page 45 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R329 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R626 0RJ0332D677 MCR03EZPJ330 33OHM 5% 1/10W 1608 R403 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R627 0RJ1003D677 MCR03EZPJ104 100KOHM 5% 1/10W 160 R407 0RJ1202D677 MCR03EZPJ123 12KOHM 5% 1/10W 1608...
  • Page 46 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R707 0RJ1002C678 MCR01MZPJ103 10KOHM 5% 1/16W 1005 R784 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R708 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R785 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R709 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005...
  • Page 47 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R906 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 CN100 6602T20009J Wafer, SMAW200-10P 10P 2.00MM 1R ANGLE D R911 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 CN101 6602T20009E Wafer, SMAW200-06P 6P 2.00MM 1R ANGLE DI R911 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608...
  • Page 48 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ACCESSORY SAC30033609 Title, CD MANUAL PDP DTV Europass 3_New Model Name MFL34441603 Manual,Owners EU 27 LANGAGES SIMPLE BOOK MKJ32022813 Remote Controller, COMPLEX LD73A 26LC4 3550V00590A Cover, MOLD ABS BATTERY TN-50PY20 ABS 6710V00142 6410TEW010A Power Cord, CEE,LP-34A&H05VV-FX3C..
  • Page 50 12. SCART &AV JACK P_3.3V 14.AV SWITCH SCART1_VIN R1201 R1275 TV_VOUT SCART2_VIN 1/10W R1202 VOUT C1242 READY R1271 C1241 R1224 READY +9V_MSP4450 C1232 Q1204 R1230 R1259 100uF 16V R1270 2SC3875S VOUT DTV/MNT_VOUT S_FB L1403 C1247 ZD1218 SCART1_FB HH-1M3216-501 Q1200 100uF 16V TP1435 R1273 2SC3875S...
  • Page 51 2.ST DDR R242 P_12V PANEL POWER FOR LCD 002:C3;002:G4 LD_A[10] LDA[10] 5.0V FOR LCD FOR PDP FOR FULL HD 8.DDR&MEMORY&LVDS P801 IC803 P800, R815 P802, R832 P801, R837 AR200 L802 FI-R51S-HF DDR TERMINATION OPTIONs READY SI4925BDY FOR LCD, HD_LCD R817, R831 R833, R834 R838, R839 LPL(FULL-HD)
  • Page 52 FOR LCD STAND_BY 1W 5. power2 +5VST [POWER BLOCK] R911-*1 R913-*1 R915-*1 R916-*1 R917-*1 R918-*1 R919-*1 R920-*1 R915 +5VST 9. POWER R923 R923-*1 R924-*1 R925-*1 R926-*1 R930-*1 R932-*1 R933-*1 R934-*1 R919 Q901 P900 2SC3875S Q904 R925 5.0V For only C.I. R939 2SC3875S RL_ON/PWR_ONOFF_2...
  • Page 53 PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) CONTROL B/D SIDE A/V IR/LED...
  • Page 54 May, 2007 P/NO : MFL38562702 Printed in Korea...

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