Panasonic TH-42A400G Service Manual
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Panasonic TH-42A400G Service Manual

Chassis: km24
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TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.1.1. Leakage Current Cold Check---------------------- 3
1.) --------------------------------------------------------- 3
2 Warning -------------------------------------------------------------- 4
2.2. About lead free solder (PbF)---------------------------- 5
3 Service Navigation ----------------------------------------------- 6
3.1. Service Hint ------------------------------------------------- 6
4 Specifications ----------------------------------------------------- 7
5 Service Mode ------------------------------------------------------ 8
5.1. How to enter into Service Mode ----------------------- 8
5.1.1. Purpose ------------------------------------------------- 8
5.1.2. Key command ----------------------------------------- 8
5.1.3. How to exit---------------------------------------------- 8
5.1.4. Contents of adjustment mode --------------------- 8
5.1.5. Display of SOS History ------------------------------ 9
5.1.6. Exit-------------------------------------------------------- 9
Model No.
Chassis:
Destination:
PAGE
5.1.7. Hotel Mode----------------------------------------------9
6 Troubleshooting Guide --------------------------------------- 10
6.1. Check of the IIC bus lines------------------------------ 10
6.1.1. How to access --------------------------------------- 10
6.1.2. Self-check indication only ------------------------- 10
shipment setting ------------------------------------- 10
6.1.4. Exit ------------------------------------------------------ 10
6.1.5. Screen display --------------------------------------- 10
6.2. Power LED Blinking timing chart --------------------- 11
6.3. Method of detecting SOS ------------------------------ 11
6.4. LCD Panel test mode ----------------------------------- 12
6.5. No Power--------------------------------------------------- 12
7.1. Speaker Fixing and Assembly ----------------------- 13
7.3. Metal MTG Fixing --------------------------------------- 15
7.4. Key Button Assembly ----------------------------------- 16
7.5. Pedestal Assembly -------------------------------------- 17
7.6. Back Cover - Label & Screw -------------------------- 18
ORDER NO. MTV1401163CE
TH-42A400G
KM24
INDONESIA
© Panasonic Corporation 2014.
LED TV
PAGE

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Summary of Contents for Panasonic TH-42A400G

  • Page 1: Table Of Contents

    5.1.4. Contents of adjustment mode --------------------- 8 7.4. Key Button Assembly ----------------------------------- 16 7.5. Pedestal Assembly -------------------------------------- 17 5.1.5. Display of SOS History ------------------------------ 9 5.1.6. Exit-------------------------------------------------------- 9 7.6. Back Cover - Label & Screw -------------------------- 18 © Panasonic Corporation 2014.
  • Page 2 TH-42A400G 8 Measurements and Adjustments -------------------------- 19 8.1. Voltage chart of A-board-------------------------------- 19 8.2. Voltage chart of P-board-------------------------------- 19 9 Block Diagram --------------------------------------------------- 20 9.1. Main Block Diagram ------------------------------------- 20 10 Wiring Connection Diagram --------------------------------- 21 10.1. Wire Dressing 1------------------------------------------- 21 10.2.

  • Page 3: Safety Precautions

    TH-42A400G 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

    TH-42A400G 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically 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)

    TH-42A400G 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).

  • Page 6: Service Navigation

    TH-42A400G 3 Service Navigation 3.1. Service Hint Board Name Main Device Remarks A BOARD TUN, EEP, SPI Flash, Realteck Soc Repairable P BOARD Power Supply, LED Driver IC Repairable K BOARD Remote, LED, Luminence Sensor Repairable GK BOARD Power Switch, Keyscan...

  • Page 7: Specifications

    TH-42A400G 4 Specifications Power source AC 220 - 240 V, 50/60 Hz Power consumption (Rated power / Standby power) 90 W / 0.25 W Display panel Panel TFT LCD Module with LED Backlight Visible screen size (diagonal) 106 cm 1,920 (W)  1,080 (H) Display resolution Dimensions (W ...

  • Page 8: Service Mode

    TH-42A400G 5 Service Mode 5.1. How to enter into Service Mode 5.1.1. Purpose After exchange parts, check and adjust the contents of adjustment mode. While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

  • Page 9: Display Of Sos History

    TH-42A400G 5.1.5. 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 shipment setting].

  • Page 10: Troubleshooting Guide

    TH-42A400G 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 6.1.2. 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 11: Power Led Blinking Timing Chart

    TH-42A400G 6.2. Power LED Blinking timing chart 1. Subject Information of LED Flashing timing chart. 2. Contents When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:...

  • Page 12: Lcd Panel Test Mode

    TH-42A400G 6.4. LCD Panel test mode Purpose: To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed. How to Enter: While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2 seconds.

  • Page 13: Disassembly And Assembly Instructions

    TH-42A400G 7 Disassembly and Assembly Instructions 7.1. Speaker Fixing and Assembly 1. Fix speaker bracket at panel and screw. 2. Stick sponge at speaker and slot at speaker bracket. DESCRIPTION REMARK SPEAKER UNIT SCREW (A3/P5/VESA4/MTL4/LBRD4/SP4) 06 ± 1 Kgf.cm SP BRACKET...

  • Page 14: Lcd Panel Fixing & Handling Method

    TH-42A400G 7.2. LCD Panel Fixing & Handling Method 1. Place down the cabinet as shown below. 2. Fix LCD panel into the cabinet by taking below precautions. Other general precautions 1. Do not press panel surface to avoid blue spot on the panel display.

  • Page 15: Metal Mtg Fixing

    TH-42A400G 7.3. Metal MTG Fixing Fix vesa metal and bottom panel into panel and screw. DESCRIPTION REMARK VESA METAL BOTTOM METAL SCREW (BC3/VESA4) 06 ± 1 Kgf.cm...

  • Page 16: Key Button Assembly

    TH-42A400G 7.4. Key Button Assembly PART NO DESCRIPTION TBX5ZA03301 KEY BUTTON BRACKET TZLP42410KA LCM ASSY...

  • Page 17: Pedestal Assembly

    TH-42A400G 7.5. Pedestal Assembly Fix pedestal follow below, need screw first before stick rubber foot. DESCRIPTION REMARK NECK BASE L NECK BASE R METAL FRAME BASE COVER RUBBER FOOT RUBBER FOOT BAG (PEDESTAL) M4  12 FLAT HEADSCREW 18 ± 2 Kgf.cm M4 ...

  • Page 18: Back Cover - Label & Screw

    TH-42A400G 7.6. Back Cover - Label & Screw 1. Fix back cover and screw. 2. Stick side button label and serial number label. PART NO DESCRIPTION REMARK TBM4GU3151 SIDE_BUTTON_LABEL THEC1509 SCREW (BC3/VESA4) 06 ± 1 Kgf.cm THTD037J SCREW (BC9/AV3/CRTL1/SP4) 06 ± 1 Kgf.cm...

  • Page 19: Measurements And Adjustments

    TH-42A400G 8 Measurements and Adjustments 8.1. Voltage chart of A-board Set A-Board to a dummy set and check the satisfaction with the specified voltage as following table. Power Supply Name Measurement Point Specification (V) Remark TNR1.8V TP8705 1.74 - 1.90 VCCK1.1V...

  • Page 20: Block Diagram

    TH-42A400G 9 Block Diagram 9.1. Main Block Diagram LED Driver 2-Layer PANEL PNL12V LVDS: CIRCUIT HD 4 pair data + 1 pair CLK Single 8 bit Panel_PWM FHD 4 pair data + 1 pair CLK Dual 8 bit Si2157 IFN / IFP...

  • Page 21: Wiring Connection Diagram

    TH-42A400G 10 Wiring Connection Diagram 10.1. Wire Dressing 1...

  • Page 22: Wire Dressing

    TH-42A400G 10.2. Wire Dressing 2 Stick pet tape for wire dressing. DESCRIPTION REMARK 60 mm  7 pcs 0.59 PET_TAPE 110 mm  1 pc 0.59 PET_TAPE...

  • Page 23: Schematic Diagram

    TH-42A400G 11 Schematic Diagram Model No. : TH-42A400G A-Board (1/12)
  • Page 24 Model No. : TH-42A400G A-Board (2/12)
  • Page 25 Model No. : TH-42A400G A-Board (3/12)
  • Page 26 Model No. : TH-42A400G A-Board (4/12)
  • Page 27 Model No. : TH-42A400G A-Board (5/12)
  • Page 28 Model No. : TH-42A400G A-Board (6/12)
  • Page 29 Model No. : TH-42A400G A-Board (7/12)
  • Page 30 Model No. : TH-42A400G A-Board (8/12)
  • Page 31 Model No. : TH-42A400G A-Board (9/12)
  • Page 32 Model No. : TH-42A400G A-Board (10/12)
  • Page 33 Model No. : TH-42A400G A-Board (11/12)
  • Page 34 Model No. : TH-42A400G A-Board (12/12)
  • Page 35 Model No. : TH-42A400G GK-Board...
  • Page 36 Model No. : TH-42A400G K-Board...
  • Page 37 Model No. : TH-42A400G LD-Board...
  • Page 38 Model No. : TH-42A400G P-Board...

  • Page 39: Printed Circuit Board

    TH-42A400G 12 Printed Circuit Board Model No. : TH-42A400G A-Board (Top Component Side)
  • Page 40 Model No. : TH-42A400G A-Board (Bottom Component Side)
  • Page 41 Model No. : TH-42A400G GK-Board...
  • Page 42 Model No. : TH-42A400G K-Board...
  • Page 43 Model No. : TH-42A400G LD-Board...
  • Page 44 Model No. : TH-42A400G P-Board (Top Component Side)
  • Page 45 Model No. : TH-42A400G P-Board (Bottom Component Side)

  • Page 46: Exploded View And Replacement Parts List

    TH-42A400G 13 Exploded View and Replacement Parts List Model No. : TH-42A400G Parts Location...
  • Page 47 Model No. : TH-42A400G Packing Exploded View 1...
  • Page 48 Model No. : TH-42A400G Packing Exploded View 2...
  • Page 49 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks CAPACITORS C2001 F1G1E103A172 C 0.01UF, 25V C2008 F1K1V106A010 C 10UF, 25V C2009 F1G1C104A146 C 0.1UF 16V C2010 F1G1C103A173 C 0.01UF, 16V C2011 F1G1H102A946...
  • Page 50 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C4945 F1H1H102B048 C 1000PF, 50V C4946 F1H1E104A161 C 0.1UF, 25V C4947 F1K1V106A010 C 10UF, 25V C4948 F1H1H104B047 C 0.1UF, 50V C4949 F1H1H105B027 C 1UF, 50V...
  • Page 51 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7213 F2A2W6500001 C 65UF, 450V C7214 F1J1H103A900 C 0.01UF, 50V C7220 F1J1H103A900 C 0.01UF, 50V C7302 F1J1H473A900 C 0.047UF, 50V C7303 F1J1H104A902 C 0.1UF, 50V...
  • Page 52 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8053 F1J1A106A043 C 10UF, 10V C8054 F1J1A106A043 C 10UF, 10V C8055 F1G1C104A184 C 0.1UF, 16V C8056 F1G1C104A184 C 0.1UF, 16V C8057 F1G1C104A184 C 0.1UF, 16V...
  • Page 53 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8715 F1G1C104A184 C 0.1UF, 16V C8716 F1G1C103A173 C 0.01UF, 16V C8717 F1G1E472A172 C 4700PF, 25V C8718 F1G1E332A172 C 3300PF, 25V C8719 F1J1A106A043 C 10UF, 10V...
  • Page 54 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D7303 DZ2J039M0L DIODE D7304 B0HAGQ000001 DIODE D7305 B0ADCK000001 DIODE D7306 B0BC027A0336 DIODE D7307 B0BC027A0336 DIODE D7308 B0BC027A0336 DIODE D7309 B0JCMG000043 DIODE D7310 B0JCMG000043...
  • Page 55 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks L6765 G1C82NJ00010 COIL L6772 G1CR27JA0097 COIL L6773 G1CR27JA0097 COIL L6774 G1CR27JA0097 COIL L6776 G1CR27JA0097 COIL L6777 G1CR22JA0097 COIL L6778 G1CR22JA0097 COIL L6779 J0JYC0000464...
  • Page 56 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Q8701 B1ABCF000231 TRANSISTOR RESISTORS R0900 D0GA272JA023 M 2.7KOHM, J.1/16W R0901 D0GA272JA023 M 2.7KOHM, J.1/16W R0911 D0GA473JA039 M 47KOHM, J,1/16W R0932 D0GAR00J0005 M 0 OHM, 1/16W...
  • Page 57 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R3108 D0GA105JA023 M 1M OHM, J,1/16W R3109 D0GA103JA039 M 10KOHM,F,1/16W R3110 D0GA221JA023 M220 OHM, J.1/16 W R3111 D0GA221JA023 M220 OHM, J.1/16 W R3113...
  • Page 58 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R5016 D0GA103JA039 M 10KOHM,F,1/16W R5021 D0GA473JA039 M 47KOHM, J,1/16W R5178 D0GA104JA039 M 10KOHM,F,1/16W R5181 D0GA473JA039 M 47KOHM, J,1/16W R5182 D0GA473JA039 M 47KOHM, J,1/16W...
  • Page 59 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7306 D0GD222JA052 M 2.2KOHM,J,1/8W R7307 D0GD562JA052 M 5.6 KOHM,J,1/8W R7308 D0GD222JA052 M 2.2KOHM,J,1/8W R7311 D0B1106JA033 M 10MOHM J 1W R7312 D0AF153JA112 M 120OHM ,J, 2W...
  • Page 60 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7825 D1BD4R70A179 M 4.7KOHM, J,1/8W R7826 D1BD4R70A179 M 4.7KOHM, J,1/8W R7827 D0GD104JA052 M 100KOHM,J,1/8W R7828 D0GD104JA052 M 100KOHM,J,1/8W R7826 D1BD4R70A179 M 4.7KOHM, J,1/8W...
  • Page 61 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8109 D0GA103JA039 M 10KOHM,F,1/16W R8110 D0GA680JA023 M 68 OHM, J,1/16W R8111 D1BA75R0A023 M 75.0 OHM,F.1/16 W R8112 D0GAR00J0005 M 0 OHM, 1/16W R8113...
  • Page 62 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks CF7104 D4CAY2R20002 TERMISTOR CN0100 K1KA14A00248 CONNECTOR F7101 K5E502YYA213 FUSE K1KY03BA0402 CONNECTOR D0GDR00J0004 CHIP RESISTOR JA10 D0GFR00J0005 CHIP RESISTOR JA11 D0GFR00J0005 CHIP RESISTOR JA13...
  • Page 63 Model No. : TH-42A400G Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Exploded View K2CQ2YY00122 AC CORD L0EYAA000052 SPEAKER UNIT L5EDDYY00613 LCD PANEL N2QAYB000823 REMOTE TRANSMITTER TBL5ZX08791 PEDESTAL ASSY TBL5ZX08911 STD METAL ASSY TBM4GD2946 MODEL NAME PLATE...

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