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Panasonic TX-42A400B Service Manual
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Panasonic TX-42A400B Service Manual

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Service Manual
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potencial dangers in attempting to service a product. Products
powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product or products deal within this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked
Schematic Diagrams, Circuit Board Diagrams, Explorer Views and Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer´s specified parts to prevent shock, fire or other hazards. Do not
modify the original design without permission of manufacturer.
Warning
IMPORTANT SAFETY NOTICE
ORDER No. PCZ1403045CE
LCD Television
TX-42A400B
KM25E Chassis
© Panasonic Corporation 2014.
Unauthorized copying and
distribution is a violation of law.
in the

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  • Page 1 Schematic Diagrams, Circuit Board Diagrams, Explorer Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer´s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. © Panasonic Corporation 2014. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ........... 3 GENERAL GUIDE LINES ........3 TOUCH – CURRENT CHECK ....... 3 PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES ..............4 ABOUT LEAD FREE SOLDER (PBF) ......5 SERVICE NAVIGATION ..........6 SERVICE HINTS ............7 APPLICABLE SIGNALS ..........

  • Page 3: Safety Precautions

    Safety Precautions General Guide Lines 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. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 4: Prevention Of Electrostatic Discharge (Esd) To Electrostatically Sensitive (Es) Devices

    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"...

  • Page 5: About Lead Free Solder (Pbf)

    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

    Service Navigation Chassis Board Layout LD-BOARD P-BOARD A-BOARD GK-BOARD K-BOARD Board Name Function A-Board AV Terminal, HDMI, USB, Digital Audio Out, TUNER DVB-T2/T/C, DVB-T2/T/C Dem, CI slot, Ethernet, Headphones, MT5561, Speaker out, Flash Memory, Peaks EEPROM P-Board Main Input, Power Supply K-Board Remote Receiver, Power and Timer LED, C.A.T.S GK-Board...

  • Page 7: Service Hints

    Service Hints How to remove the backcover Lay the main unit face down. (see Fig.5) Fig.5 Remove the 4 fixing screws and the pedestal assembly. (see Fig.6) SCREWS (1) THE5ZL002N /4pcs/ Fig.6 Remove the 24 fixing screws and the backcover. (see Fig.7) SCREWS (2) THTD037J /17pcs/ (3) THEC1509 /7pcs/...

  • Page 8: Applicable Signals

    Applicable Signals Component (Y, Pb, Pr) (from AV2 terminal), HDMI Signal name COMPONENT HDMI 525 (480) / 60i,60p 625 (576) / 50i, 50p 750 (720) / 60p, 50p 1,125 (1,080) / 60i, 50i 1,125 (1,080) / 60p 1,125 (1,080) / 50p 1,125 (1,080) / 24p Note: ...

  • Page 9: Specifications

    Specifications Power Source: 220-240V AC, 50 / 60Hz Rated Power Consumption: Stand-by Power Consumption: 0.35W Aerial Impedance: 75 unbalanced, Coaxial Type Receiving System: DVB-T/T2 Digital terrestrial services 42A400B (UK) PAL I UHF E21-E68 42A400B (Ireland) PAL I VHF A-J UHF E21-E69 CATV S1-S20 CATV S21-S41(Hyperband) PAL 525/60...
  • Page 10 LCD screen: L5EDDYY00614 1920 x 1080, 16:9 Visible Diagonal 1060mm Audio Output: 20W (2 x 10W) Headphones: 3.5mm, 8 Impedance Accessories supplied : Remote Control 2 x R6 (UM3) Batteries Dimensions: Width: Height: Depth: Including TV stand 963mm 610mm 247mm TV set only 963mm 566mm...

  • Page 11: Technical Description

    Technical Description Model and Keys: All KEYS are not generated for all models. The necessary KEYS are only generated and stored depend on the feature of models. Keys Model No. CI PLUS HDCP TX-42A400B...

  • Page 12: Setting Inspection

    Setting Inspection Voltage Confirmation A board Description Test point Voltage STB3.3V TP8006 3.19V - 3.46V PNL12V TP4300 11.5V - 12.5V SUB5V TP8002 4.9V - 5.1V SUB3.3V TP8003(TP6701) 3.19V - 3.46V SUB1.2V(VCCK1.2V) TP8000(TP8004) 1.14V - 1.26V DDR1.5V TP8001 1.48V - 1.56V DMD_1.2/1.1 TP5702 1.1V - 1.14V...

  • Page 13: Service Mode Function

    Service Mode Function MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu How to enter into Service Mode While pressing [VOLUME ( - )] button on the main unit, press the [ ] button on the remote control for 3 times within 2 seconds.

  • Page 14: Service

    SERVICE SERVICE SOFT ver.1.050 MODEL ID 0B005100000020 Key Command S e r v i c e 1 ADJUST 1.04.0008 INV Cnt  WB-ADJ PQ Ver 0.EU.060 Press the 3/4 button to change the adjustment values or function. PTCT 00.00.00.00.00  Press the 1/2 button to step up/down through the functions and adjustments OPTION SQ Ver...

  • Page 15: Hotel Mode

    Hotel Mode 1. Purpose Restrict a function for hotels. 2. Access command to the Hotel mode setup menu. In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol.[Down] + [REMOTE] : AV (3 times) Then, the Hotel mode setup menu is displayed.

  • Page 16: Self Check

    While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds. How to exit Switch off the power with the [POWER] button on the main unit. TX-42A400B Panasonic 2014 LCD Self Check Complete SOFT Ver. 1.050 EEPROM 1.04.0008...

  • Page 17: Power Led Blinking Timing Chart

    Power LED blinking timing chart Subject Information of LED Flashing timing chart. Contents When 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 number of blinking of the Power LED on the front panel of the unit. Blinking Blinking timing Contents...

  • Page 18: Adjustment Method

    Adjustment Method White Balance Adjustment Instrument Name Connect to Remarks Remote controller Correlation can be also taken by LCD WB meter (Minolta CA-210 or equivalent) CS-1000A or equivalent Comunication jig Computer for external control Procedure Remarks Let the panel standfor more than 3 hours at more than 20 C.

  • Page 19: Wiring Diagram

    Wiring Diagram LCD PANEL...

  • Page 20: Block Diagram (1 Of 2)

    Block Diagram (1/2) SP_L SP_R CI SLOT SERVICE JK8400 CN0100 17,18 51,52 A-BOARD STM-SQ SBO/I SDBOOT 10,11 SUB3.3V 14,15 26,27 30,31 RED_LED IC4900 9,16,25,32 SDA/SCL [C1AB00003984] SUB3.3V AUDIO AMP IC6800 DMD _1.2/1.1V IF_N,P IF_P,N SUB3.3V IF_N,P [C1AB00004028] 38,37 IC8900A IC8901 DVB-T/T2/C DEM SPI_ROM SPI_ROM...
  • Page 21 Block Diagram (2/2) TO P5 TO GK4 TO A02 TO LD1 GK-BOARD P-BOARD SW2851 SW2857 SW2852 SW2853 SW2854 SW2855 K-BOARD Q7201 TO A10 TO PANEL LD-BOARD D7105 D7104 MAIN INPUT TO P4 JK7101...

  • Page 22: Parts Location

    Parts Location TMK0EA471 TMK0EA472 TMK0EA472 TMK0EA477 TMK0EA476 TMK0EA473 TMK0EA474 TMK0EA475...
  • Page 23 Parts Location...

  • Page 24: Location Of Lead Wiring

    Location of Lead Wiring SP_R SP_L...

  • Page 25: Replacement Parts List Note

    Replacement Parts List Note Note: All parts except parts mentioned [PAVCCZ] in the Remarks column are supplied by AVC-CSPC. Parts mentioned [PAVCCZ] are supplied by PAVCCZ. Notice: Be sure to make your orders of replacement parts according to this list. RTL (Retention Time Limited) Note: The marking (RTL) indicates that the Retention Time is Limited for this item.

  • Page 26: Replacement Parts List

    Model No. : TX- - - - 42A400B Model No. : TX 42A400B Parts List Parts List Model No. : TX Model No. : TX 42A400B 42A400B Parts List Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks BAT-C-0816...
  • Page 27 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks FK314 TMK0EA479 FELT(10X50XT0.55) 1 PAVCCZ FRONTCUS TPD0E50391 CUSHION FRONT 1 PAVCCZ GK301 TEW5ZA005 GASKET 1 PAVCCZ SK201 THTD037J SCREW M3X10 1 PAVCCZ SK202...
  • Page 28 Model No. : TX- - - - 42A400B Model No. : TX 42A400B Parts List Parts List Model No. : TX Model No. : TX 42A400B 42A400B Parts List Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks A-42A400B...
  • Page 29 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C3107 F1L1C226A068 C 22UF, M, 16V 1 PAVCCZ C3108 F1G1H100A948 C 10PF, J, 50V 1 PAVCCZ C3109 F1G1H100A948 C 10PF, J, 50V 1 PAVCCZ...
  • Page 30 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C4923 F1H1E104A161 C 0.1UF, , 25V 1 PAVCCZ C4924 F1H1E104A161 C 0.1UF, , 25V 1 PAVCCZ C5028 F1G1C104A146 C 0.1UF, , 16V 1 PAVCCZ...
  • Page 31 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C7304 F1A3A221A060 C 220PF, , 1KV 1 PAVCCZ C7305 F1J1H104A902 C 100NF, , 50V 1 PAVCCZ C7306 F1J1H104A902 C 100NF, , 50V 1 PAVCCZ...
  • Page 32 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8108 F1G1C104A146 C 0.1UF, , 16V 1 PAVCCZ C8109 F1G1C103A173 C 0.01UF, K, 16V 1 PAVCCZ C8111 F1G1E332A144 C 3300PF, -, 25V 1 PAVCCZ...
  • Page 33 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks C8405 F1G1C104A146 C 0.1UF, , 16V 1 PAVCCZ C8407 F1G1C104A146 C 0.1UF, , 16V 1 PAVCCZ C8408 F1G1C104A146 C 0.1UF, , 16V 1 PAVCCZ...
  • Page 34 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D7301 DZ2J039M0L ZENER DIODE 1 PAVCCZ D7302 B0HAGQ000001 DIODE 1 PAVCCZ D7303 DZ2J039M0L ZENER DIODE 1 PAVCCZ D7304 B0HAGQ000001 DIODE 1 PAVCCZ D7305...
  • Page 35 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks D0GDR00J0004 M 0 OHM, J, 1/8W 1 PAVCCZ JA10 D0GFR00J0005 M 0 OHM, J, 1/4W 1 PAVCCZ JA11 D0GFR00J0005 M 0 OHM, J, 1/4W...
  • Page 36 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks L7814 G0C660Z00001 COIL 1 PAVCCZ L8008 J0JYC0000464 FILTER 1 PAVCCZ L8048 G1C4R7ZA0311 COIL 1 PAVCCZ L8049 G1C3R3MA0464 COIL 1 PAVCCZ L8050 G1C150MA0533 COIL...
  • Page 37 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks Q8003 B1ABCF000231 TRANSISTOR 1 PAVCCZ Q8400 B1CBHG000002 TRANSISTOR 1 PAVCCZ Q8401 B1CBHG000002 TRANSISTOR 1 PAVCCZ R0902 D0GA272JA023 M 2K7 OHM, J, 1/16W 1 PAVCCZ...
  • Page 38 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R3055 D0GA473JA023 M 47K OHM, J, 1/16W 1 PAVCCZ R3059 D1BF75R0A073 M 75 OHM, F, 1/4W 1 PAVCCZ R3060 D0GA101JA039 M 100 OHM, J, 1/16W...
  • Page 39 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R4513 D0GA820JA023 M 82 OHM, J, 1/16W 1 PAVCCZ R4514 D0GA220JA023 M 22 OHM, J, 1/16W 1 PAVCCZ R4515 D0GA473JA039 M 47K OHM, J, 1/16W...
  • Page 40 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R5610 D1BA3742A023 M 37K4 OHM, F, 1/16W 1 PAVCCZ R5709 D1BA1201A023 M 1K2 OHM, F, 1/16W 1 PAVCCZ R5710 D1BA3001A023 M 3K OHM, F, 1/16W...
  • Page 41 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7220 D0GB223JA065 M 22K OHM, J, 1/10W 1 PAVCCZ R7224 D1BD8203A203 M 820K OHM, F, 1/8W 1 PAVCCZ R7225 D1BF1504A073 M 1M5 OHM, F, 1/4W...
  • Page 42 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7536 D0GD100JA052 M 10 OHM, J, 1/8W 1 PAVCCZ R7802 D0GDR00J0004 M 0 OHM, J, 1/8W 1 PAVCCZ R7803 D0GD222JA052 M 2K2 OHM, J, 1/8W...
  • Page 43 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R7879 D0GF242JA048 M 2K4, J, 1/4W 1 PAVCCZ R7880 D0GF242JA048 M 2K4, J, 1/4W 1 PAVCCZ R7881 D0GF242JA048 M 2K4, J, 1/4W 1 PAVCCZ...
  • Page 44 Model No. : TX-42A400B Parts List Ref. Change Safety Part No. Part Name & Description Q'ty Remarks R8443 D1H86804A042 M 68 OHM, J, 1/16W 1 PAVCCZ R8444 D0GA680JA023 M 68 OHM, J, 1/16W 1 PAVCCZ R8445 D0GA680JA023 M 68 OHM, J, 1/16W...

  • Page 45: Schematic Diagrams Note

    Schematic Diagrams Note IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturers' specified parts. NOTE RESISTOR All resistors are carbon ¼W resistor, unless marked otherwise. Unit of resistance is OHM () (k=1,000, M=1,000,000) CAPACITORS All capacitors are ceramic 50V unless marked otherwise.

  • Page 59: Conductor Views

    Conductor Views A-BOARD - TOP JS0032 JS0035 JS0044 JS0047 JS0033 JS0036 JS0045 JS0048 JS0034 JS0037 JS0046 JS0049 CN0100 JS0055 JS0067 JS0056 JS0059 JS0068 JS0071 JS0057 JS0060 JS0069 JS0072 D0901 C2001 R0944 R0945 S R V - 1 6 V R2018 R2019 C2002 R2014...
  • Page 60 A-BOARD - BOTTOM TP0922 TP0923 TP0921 D2003 D2002 R2027 R2022 R2023 D2000 D2001 R8903 R2020 C8409 R0933 R2013 C2016 C0065 R5096 R5097 C8407 TP2008 R2033 Q5009 Q5010 R8426 TP8397 R8417 TP2000 TP8396 TP8395 TP8362 R5176 R5177 C5170 Q5172 TP2009 TP2002 D2005 TP8394 TP8361...
  • Page 61 P-BOARD - TOP S R V - V L E D JS7402 PA7407 PA7401 J312 IC7401 R7407 C7418 C7419 C7421 D7503 C7436 J113 J111 C7430-A D7402 C7430-B C7430 JS7503 JS7503 JS7502 D7414 J216 J112 D7415 D7401 JS7401 D7404 J115 JS7304 L7303 J105 J102...
  • Page 62 P-BOARD - BOTTOM JS7402 PA7407 Q7405 PA7401 Q7402 R7411 J312 IC7401 R7409 R7422 C7420 R7413 C7432 R7407 C7418 TP7404 R7406 C7433 C7529 C7419 C7530 R7535 R7415 C7421 D7503 C7436 R7414 R7534 C7541 IC7503 R7426 R7533 C7542 R7408 C7525 J113 J111 JS7501 R7510 C7430-A...
  • Page 63 LD-BOARD - TOP J304 S R V - 3 2 V J108 J201 L7802 L7809 JS7805 JS7800 C7808 JS7801 L7810 L7803 JS7806 Q7804-HEAT0 C7816 C7812 S R V - V L E D 2 J103 J303 R7845 R7838 R7848 R7841 R7846 C7817 R7839...
  • Page 64 LD-BOARD - BOTTOM C7836 R7892 JA14 TP7816 C7835 C7833 J304 C7834 C7832 CL7800 C7837 J201 J108 TP7817 TP7819 TP7818 TP7815 R7805 R7802 TP7814 CL7890 L7802 JS7805 JS7800 CL7830 L7809 R7804 C7808 L7803 JS7801 JS7806 C7830 Q7804-HEAT0 L7810 C7829 TP7811 TP7800 CL7803 R7837 R7881...
  • Page 65 GK-BOARD - TOP VOL.DN VOL.UP CH.DN CH.UP INPUT SW2857 SW2855 D2851 D2852 1 GK TNPA5917 O R D E R N O . GK-BOARD - BOTTOM C2852 C2851 SW2855 SW2854 SW2853 CL2851 SW2852 SW2851 SW2857 CL2852 VJ2851 D2851 D2852 CL2853 R2855 R2854 R2853...
  • Page 66 K-BOARD R2807 R2808 R2800 R2809 R2801 R2816 TD2805 C2800 TD2807 R2802 C2804 C2806 C2803 TD2801 TD2806 TD2802 R2822 C2808 TD2804 TD2803 R2821 D2802 D2802A...

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