Panasonic TC-L42U12 Service Manual
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Panasonic TC-L42U12 Service Manual

42 inch class 1080p lcd hdtv
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42 inch Class 1080p LCD HDTV
TC-L42U12
Model No.
LH91 Chassis
© Panasonic Corporation 2009.
Unauthorized copying and distribution is a violation
of law.
ORDER NO.MTNC090322CE
B05 Canada: B07

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Summary of Contents for Panasonic TC-L42U12

  • Page 1 ORDER NO.MTNC090322CE B05 Canada: B07 42 inch Class 1080p LCD HDTV TC-L42U12 Model No. LH91 Chassis © Panasonic Corporation 2009. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions -----------------------------------------------3 11.11. A-Board (10/11) Schematic Diagram --------------- 37 1.1. General Guidelines ----------------------------------------3 11.12. A-Board (11/11) Schematic Diagram --------------- 38 2 Warning --------------------------------------------------------------4 11.13. V-Board Schematic Diagram ------------------------- 39 2.1. Prevention of Electrostatic Discharge (ESD) 12 Printed Circuit Board------------------------------------------ 40 to Electrostatically Sensitive (ES) Devices ----------4 12.1.

  • Page 3: Safety Precautions

    1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 4: Warning

    2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor [chip] components.

  • Page 5: About Lead Free Solder (Pbf)

    2.2. About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

  • Page 6: Service Navigation

    3 Service Navigation 3.1. Service Hint Board Name Function A-Board Rear Terminal, AV Switch, MCU, Audio & Video Processor, LVDS, Tuner V-Board Remote Receiver, LED P-Board Power (AC/DC), DC-DC Non-serviceable P-Board should be exchanged for service. Control Panel Assy Control Button, Power switch Non-serviceable Control Panel Assy should be exchanged for service.

  • Page 7: Specifications

    4 Specifications Power Source AC 110-127 V, 60 Hz Power Consumption Maximum 217 W Standby Condition 0.3 W Display panel Aspect Ratio 16:9 Visible screen size 42 inch class (42.0 inches measured diagonally) (W × H × Diagonal) 36.6 inch × 20.6 inch × 42.0 inch (930 mm × 523 mm × 1,067 mm) 2,073,600 (1,920 (W) ×...

  • Page 8: Service Mode

    5 Service Mode 5.1. How to enter into Service Mode While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds. 5.1.1. Key command [1] button...Main items Selection in forward direction [2] button...Main items Selection in reverse direction [3] button...Sub items Selection in forward direction [4] button...Sub items Selection in reverse direction...

  • Page 9: Srv-Tool

    5.2. SRV-TOOL 5.2.1. How to access 1. Select [SRV-TOOL] in Service Mode. 2. Press [OK] button on the remote control. 5.2.2. Display of SOS History SOS History (Number of LED blinking ) indication. From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment. This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory ship- ment setting].

  • Page 10: Hotel Mode

    5.3. Hotel mode 1. Purpose Restrict a function for hotels. item Function 2. Access command to the Hotel mode setup menu Mode Select hotel mode off/on In order to display the Hotel mode setup menu, please Input Select input signal modes. enter the following command (within 2 second).

  • Page 11: Troubleshooting Guide

    6 Troubleshooting Guide Use the self-check function to test the unit. 1. Checking the IIC bus lines 2. Power LED Blinking timing 6.1. Check of the IIC bus lines 6.1.1. How to access Self-check indication only: Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.

  • Page 12: Power Led Blinking Timing Chart

    6.2. Power LED Blinking timing chart 1. Subject Information of LED Flashing timing chart. 2. Contents When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

  • Page 13: No Power

    6.3. No Power First check point There are following 2 states of No Power indication by power LED. 1. No lit 2. Red is lit then turns red blinking a few seconds later. (See 6.2.)

  • Page 14: Disassembly And Assembly Instructions

    7 Disassembly and Assembly Instructions 7.1. Pedestal assy 7.3. AC cord and Rear center cover 1. Lay down the unit so that the rear cover faces upward. 1. Remove the bushing of the AC cord from the rear center 2. Remove the 4 screws. cover.

  • Page 15: Side Av Bracket

    7.5. Side AV bracket 7.7. Control panel 1. Remove the screw (C). 1. Remove the 2 screws. 2. Remove the screw (D). 2. Remove the control panel. 3. Remove the side AV bracket. 7.6. A-Board 1. Remove the 6 screws. 2.

  • Page 16: Chassis Frame Assy

    7.9. Chassis frame assy 7.11. LCD TOP MTG 1. Remove the 7 screws. 1. Remove the 4 screws (G). 2. Remove the Chassis frame assy. 2. Remove the 4 screws (H). 3. Remove the LCD TOP MTG. 7.10. VESA rail assy 1.

  • Page 17: Lcd Btm Mtg

    7.12. LCD BTM MTG 7.14. V-Board 1. Remove the 4 screws (I). 1. Remove the 2 screw. 2. Remove the 2 screws (J). 2. Remove the V-Board. 3. Remove the LCD BTM MTG. 7.13. LCD Panel 1. Remove the 12 screws. 2.

  • Page 18: Emi Processing

    7.15. EMI processing...

  • Page 19: Measurements And Adjustments

    8 Measurements and Adjustments 8.1. Voltage chart of P-board VOLTAGE TEST POINT SPECIFICATION (Reception state) 5.136 TP2831 5.2 ± 0.26 V 3.305 TP5480 3.3 ± 0.16 V 1.261 TP5602 1.26 ± 0.06 V 1.835 TP5601 1.83 ± 0.09 V 3.309 TP5600 3.3 ±...

  • Page 20: Picture Level Adjustment (Rf)

    8.3. Picture level adjustment (RF) Instrument Name Remarks 1. REMOTE TRANSMITTER 2. Ex. Signal (Split color bar) Adjustment or Inspection Procedure Remarks <procedure> 1. Receive the split color bar. (Screen mode: ZOOM or FULL Picture mode: DYNAMIC AI: OFF AI Picture: OFF) *BACK LIGHT +30 <Inspection>...

  • Page 21: Block Diagram

    9 Block Diagram 9.1. Main Block Diagram A-BOARD 27MHz IFD1/2 TS Serial FRONT END Tuner CLOCK 74MHz EEPWP EEPROM DDR2 SDRAM 27MHz HDMI1 IIC3 HDMI1 HDMI2 TS Serial HDMI2 RESET HDMI Receiver HDMI3 Digital video signal HDMI3 A/D converter FLASH AUDIO Analog MEMORY...

  • Page 22: Block (1/2) Diagram

    9.2. Block (1/2) Diagram JK3001 JK4800 JK3104 COMPONET1 VIDEO1 VIDEO2 PC IN A-BOARD TU8300 TUNER ANALOG IC8300 FRONTEND IIC2 IC3001 AV SW IFD1/2 DIGITAL DIGITAL DEMODULE IF AGC VIDEO1 SUB3.3V Y/C/V SUB1.2V VIDEO2 IC5481 IIC2 BT30V BT30V COMP1 Y/PB/PR SUB5V MAIN OUT Y/CVBS, PB/C,PR,...

  • Page 23: Block (2/2) Diagram

    9.3. Block (2/2) Diagram JK4501 JK4500 JK4503 A-BOARD HDMI2 HDMI1 HDMI3 AUDIO PROCESSOR IC2301 IC4510 HDMI Rx/AD CONV. AUDIO AMP L(+) HDMI3 SPEAKER(L) L(-) SPEAKER HDMI1 PWM OUT R(+) HDMI2 R(-) SPEAKER(R) +17V SOS DET MAIN VIDEO DDCA_IIC HP OUT HEADPHONE DDCB_IIC DDCD_IIC...

  • Page 25: Wiring Connection Diagram

    10 Wiring Connection Diagram 10.1. Caution statement. Caution: Please confirm that all flexible cables are assembled correctly. Also make sure that they are locked in the connectors. Verify by giving the flexible cables a very slight pull. 10.2. Wiring...

  • Page 27: Schematic Diagram

    11 Schematic Diagram 11.1. Schematic Diagram Notes...

  • Page 28: A-Board (1/11) Schematic Diagram

    11.2. A-Board (1/11) Schematic Diagram Peaks Lite2 IC8001 MN2WS0047 DDR2_0 IC8002 C3ABSY000036 R8084 LOSD OUT (for ZWEI) FOR ZWEI VIDEO FOR ADV7495 B PORT (Sub Video Input or Address) CPU BUS I/F MCLK AE23 IC8001 1.8V_DDRI/F TO 9/11 TO 2/11 TO 2/11 TO 7/11 POD,CI I/F...

  • Page 29: A-Board (2/11) Schematic Diagram

    11.3. A-Board (2/11) Schematic Diagram A-BOARD (2/11) TXN/A10PYHS SUB3.3V R8661 R8663 XECS2 TO 1/11 SUB5V SUB3.3V XECS4 TP8550 C8506 FACTORY USE From PEAKS-LiteII 0.1u R4090 EXB2HV560JV R8556 AA_ED0 4.7k AA_ED1 TO 1/11 TP8551 R8559 R8615 TO 1/11 AA_ED2 VI2CLK2 TP8574 AA_ED3 EEPROM_WP SBO0...

  • Page 30: A-Board (3/11) Schematic Diagram

    11.4. A-Board (3/11) Schematic Diagram SUB9V D5415 BT30V TP5481 TP5482 PA5400 L5483 L5484 R5498 MA3X78900L G1C470MA0077 ZA5404 K5H1622A0023 G1C100MA0072 ZA5400 TESA169 R5496 ZA5401 MAIN_9V MAIN3.3V C5537 C5498 D5416 ZA5416 TESA169 SUB3.3V MAIN3.3V B0BC03900015 SUB9V MAIN9V TP5416 TP5400 ZA5402 ZA5400 R5416 R5400 TESA169 C5538...

  • Page 31: A-Board (4/11) Schematic Diagram

    11.5. A-Board (4/11) Schematic Diagram A-BOARD (4/11) TXN/A10PYHS OPERATE MAIN3.3V Q2301 TP2315 R2331 B1ADCE000022 AG_SOUND_SOS To SOS R2302 C2301 2.2k R2330 0.1u 3.9k SOUNDVCC R2315 R2301 IC2301 2.2k C2361 C1AB00002875 C2337 C2302 470u R2350 0.022u AUDIO AMP OPERATE MUTE 0.1u RESET R2317 C2377...

  • Page 32: A-Board (5/11) Schematic Diagram

    11.6. A-Board (5/11) Schematic Diagram TO 2,6/11 R2837 TP3106 AD_SDA3 PL2_EEPROM R2836 TP2837 GenX8 JK3104 A-BOARD (5/11) AD_SCL3 Lite2 SDA3 TP2836 K1FB315A0006 Lite2 SCL3 TP3101 TO 6/11 R2835 TP2835 PC IN PC_R TXN/A10PYHS C3098 GenX SDA1 GenX8 EEPROM R2834 TP2834 D3079 GenX8 R3104...

  • Page 33: A-Board (6/11) Schematic Diagram

    11.7. A-Board (6/11) Schematic Diagram A-BOARD (6/11) TXN/A10PYHS SUB5V FACTORY SUB3.3V TO 1/11 R1254 R1253 TP1110 UART(LITE2-GenX4) R1239 G-PEAKS_SERIAL_SBO SBI2 R1235 G-PEAKS_SERIAL_SBI SBO2 TP1111 D1114 R1240 MA3X704A0L G-HDMI_CEC_PU_ON TO 9/11 TP4601 AG_HDMI_CEC AG_HDMI_CEC TP4600 AG_HDMI_5V_DET1 AG_HDMI_5V_DET1 AG_HDMI_5V_DET2 AG_HDMI_5V_DET2 AG_HDMI_5V_DET3 AG_HDMI_5V_DET3 AG_HPD1 AG_HPD1 AG_HPD2...

  • Page 34: A-Board (7/11) Schematic Diagram

    11.8. A-Board (7/11) Schematic Diagram A-BOARD (7/11) TXN/A10PYHS MAIN3.3V L4210 J0JHC0000117 C4246 6.3V TO 1/11 R4400 R4402 MVCLK LVDS_CLKOF MVCLK TO 6/11 SIDE R4401 LCD PANEL AG_PANEL_AGW Lite2 C4341 K1KB51B00003 AG_PANEL_TEST_ON PANEL SIDE 0.01u R4406 C4353 0.01u EXB2HV151JV BOUT_19 BIN9 VOP9 R4806 TP4855...

  • Page 35: A-Board (8/11) Schematic Diagram

    11.9. A-Board (8/11) Schematic Diagram A-BOARD (8/11) TXN/A10PYHS R4714 STB5V R4530 AG_HDMI_5V_DET2 D4620 D4612 R4715 B0BC5R6A0275 MA2J11100L R4533 D4617 B0BC5R6A0275 R4718 STB5V R4721 L4523 TO 6/11 D4541 TP4529 MA2J11100L J0JYC0000068 DDCD_SDA DDCD_SDA R4667 DDCSDA3 L4524 Q4532 R4603 TO 6/11 J0JYC0000068 DDCD_SCL DDCD_SCL R4723...

  • Page 36: A-Board (9/11) Schematic Diagram

    11.10. A-Board (9/11) Schematic Diagram A-BOARD (9/11) TXN/A10PYHS TO 1/11 TO 5/11 Peaks AVC MAIN_Y/CVBS MAIN_Y/CVBS (PC RGB30bit) MAIN_PB/C VI1P9 B9/CbCr9 MAIN_PB/C VI1P9 MAIN_PR VI1P8 B8/CbCr8 MAIN_PR VI1P8 RGB_CVBS VI1P7 B7/CbCr7 RGB_CVBS VI1P7 VI1P6 B6/CbCr6 VI1P6 PC_HS PC_HS VI1P5 B5/CbCr5 VI1P5 PC_VS PC_VS...

  • Page 37: A-Board (10/11) Schematic Diagram

    11.11. A-Board (10/11) Schematic Diagram A-BOARD (10/11) TXN/A10PYHS PowerSupply TVDD_3.3V VAVDD_1.8V DVDD_1.8V C1AB00003048 C4642 C4626 SUB5V C4628 0.1u 1.8V 16V 0.1u 0.1u DGND IC4510 IC4510 TVDD DGND IC4510 IC4510 DVDD DGND IC4510 AGND IC4510 IC4510 VAVDD 3.3V DGND IC4510 IC4510 TVDD DGND IC4510...

  • Page 38: A-Board (11/11) Schematic Diagram

    11.12. A-Board (11/11) Schematic Diagram A-BOARD (11/11) TXN/A10PYHS SUB5V L8306 J0JHC0000045 R8317 R8314 Q8300 TO 6/11 2SB0709ASL AG_RF_AFT1 AG_RF_AFT1 TO 5/11 TP8003 AC_TV1_R AC_TV1_R TP8002 AC_TV1_L AC_TV1_L TP8005 AC_TV1_V AC_TV1_V I2C, IFAGC R8338 SUB1.2V SUB3.3V TO 1/11 CH0CLK CH0CLK TUNER L8309 CH0DATA TU8300...

  • Page 39: V-Board Schematic Diagram

    11.13. V-Board Schematic Diagram A-BOARD (A10) V-BOARD TNPA4834ABS REMOTE RM2500 B3RAD0000127 R2512 POWER LED *D2500A SUFFIX C2501 C2502 B3AAB0000343 6.3V 0.01u *JS2501 *R2509 R2516 *R2504 Q2504 Q2500 B1ABCF000231 R2518 B1ABCF000231 *R2502 R2517 100k...

  • Page 40: Prevention Of Electrostatic Discharge (Esd) 12 Printed Circuit Board

    12 Printed Circuit Board 12.1. A-Board A-BOARD (FOIL SIDE) TXN/A10PYHS TP4855 R8721 R8722 R1235 TP8575 R8615 TP1109 TP1111 TP4830 TP4815 TP4814 TP4831 TP4812 TP4817 R1254 R8614 R4882 R1239 TP1110 TP8574 R1253 ZA5409 TP4856 TP8516 L4802 C4801 TP4806 R8019 TP1108 R8020 R8016 R8015 R4810...
  • Page 41 Parts Location Parts Location A-BOARD (FOIL SIDE) A-BOARD (COMPONENT SIDE) TRANSISTOR TRANSISTOR IC1102 Q2301 IC1103 Q2063 IC2008 Q2302 IC2301 Q2064 IC3001 Q4500 IC2302 Q2065 IC4511 Q4501 IC4202 Q2303 IC4513 Q4535 IC4510 Q2304 IC4700 Q4536 IC4512 Q2309 IC5451 Q4801 IC5405 Q4514 IC5480 Q5417 IC5409...
  • Page 42 A-BOARD (COMPONENT SIDE) TXN/A10PYHS C5687 A 1 7 R8566 C5698 A 2 0 C5695 R4828 Q4800 ZA5408 FL4800 FL4801 FL4802 FL4803 FL4804 C1139 C4805 R4863 Q 4 8 0 0 Q4807 R1244 IC1103 R8573 R1205 R1201 R4827 I C 8 5 0 2 L8500 Q 4 8 0 3 R8021...

  • Page 43: V-Board

    12.2. V-Board V-BOARD (FOIL SIDE) TNPA4834ABS T P 5 0 7 T P 5 0 2 T P 5 0 4 T P 5 0 1 P b F TNPA4834 1 S E E R E V E R S E F O R S U F F I X .

  • Page 45: Exploded View And Replacement Parts List

    13 Exploded View and Replacement Parts List 13.1. Exploded View and Mechanical Replacement Parts List 13.1.1. Exploded View...
  • Page 46 13.1.2. Accessory...
  • Page 47 13.1.3. Mechanical Replacement Parts List...
  • Page 48 Ref. Safety Part No. Part Name & Description Q'ty Remarks 10030-0047500 BATTERY COVER 1 PAVCA EAS16S07AS SP UNIT J0KG00000127 FILTER K0RB00700013 CONTROL PANEL ASSY 1 PAVCA K1PY51Y00029 LVDS LEAD 1 PAVCA K2CB2YY00010 AC CORD 1 PAVCA L5EDDAT00001 LCD PANEL 1 PAVCA N2QAYB000321 REMOTE CONTROLLER 1 PAVCA...

  • Page 49: Electrical Replacement Parts List

    13.2. Electrical Replacement Parts List 13.2.1. Replacement Parts List Notes...
  • Page 50 13.2.2. Electrical Replacement Parts List Safety Ref. No. Part No. Part Name & Pcs Remarks Description Safety Ref. No. Part No. Part Name & Pcs Remarks C2321 F1H1H104A970 C 0.1UF, K, 50V Description C2323 F1H1H104A970 C 0.1UF, K, 50V C2333 F1J1E3340003 C 0.33UF, Z, 25V K1KA03A00632 3P CONNECTOR C2335...
  • Page 51 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description C4346 F1G1C103A116 C 0.010UF, K, C5463 F1K1C1060004 C 0.010UF, 16V C5480 F1G1C103A116 C 0.010UF, K, C4347 F1G1C104A116 C 0.10UF, K, 16V C4348 F1G1C103A116 C 0.010UF, K, C5481...
  • Page 52 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description C8033,34 F1G1C104A116 C 0.10UF, K, 16V D2500A B3AAB0000343 LED PAVCA C8035,36 F1J1A106A043 C 0.010UF, K, D3001,02 EZJP0V080GA VARISTOR D3013-15 EZJP0V080GA VARISTOR...
  • Page 53 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description JK4503 K1FY119E0005 CONNECTOR Q5412 B1CHRE000005 TRANSISTOR JK4800 K4AK16B00001 TERMINAL BOARD Q5417 B1CHRE000005 TRANSISTOR JK8302 K1NA09E00080 9P CONNECTOR Q5421 2SC584500L TRANSISTOR Q5431...
  • Page 54 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description R2002 ERJ2GEJ102X M 1K OHM J 1/4W R2380 ERJ2GEJ561 M 60 OHM, J,0.063W R2003 ERJ2GEJ105 M 1MOHM, J,0.063W R2381 ERJ2GEJ474 M 470KOHM,...
  • Page 55 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description R3160,61 ERJ2GEJ184 M 180KOHM, R4616 ERJ2GEJ680 M 68 OHM, J,0.063W J,0.063W R3164,65 ERJ2GEJ184 M 180KOHM, R4618 D0YAR0000007 M 0 OHM 1/4W J,0.063W R4619,20 ERJ2GEJ473...
  • Page 56 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description R4808 ERJ2GEJ103 M 10KOHM, R5480 ERJ2GEJ473 M 47KOHM, J,0.063W J,0.063W R4809 ERJ2GEJ102X M 1K OHM J 1/4W R5481 ERJ2GEJ101 M 100 OHM, J,0.063W...
  • Page 57 Safety Ref. No. Part No. Part Name & Pcs Remarks Safety Ref. No. Part No. Part Name & Pcs Remarks Description Description R8083 ERJ2GEJ301 M 300 OHM, R8504 ERJ2GEJ103 M 10KOHM, J,0.063W J,0.063W R8084 D0YAR0000007 M 0 OHM 1/4W R8512 ERJ2GEJ103 M 10KOHM, J,0.063W...

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