Panasonic TX-L42D25B Service Manual
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Service Manual
Specifications
Power Source:
Power Consumption
Stand-by Power Consumption: 0.30W (Without monitor out recording)
Aerial Impedance:
Receiving System:
PC signals:
Receiving Chanels:
Aerial - Rear:
Operating Conditions:
220-240V AC, 50/60Hz
152W
36W (With monitor out recording)
75Ω unbalanced, Coaxial Type
PAL-I
PAL-525/60 (AV only)
DVB-T/T2 Digital terrestrial services via UHF aerial input.
DVB-S/S2 – (freesat Other Sat.):
freesat services via Satellite dish input.
Receiver frequency range – 950 MHz to 2,150MHz
LNB Power and Polarisation – Vertical: +13V
22 kHz Tone – Frequency: 22kHz ± 2kHz
Amplitude: 0.6V ± 0.2V
Symbol Rate – Max. 30MS/s
FEC Mode – 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
Demodulation – QPSK, 8PSK
Not available for DiSEqC control.
M.NTSC (AV only)
NTSC (AV only)
VGA, SVGA, WVGA, XGA, SXGA, WXGA (compressed)
Horizontal scanning frequency
Vertical scanning frequency
UHF E21-E68
UHF
Temperature : 0°C ÷ 35°C
: 20% ÷ 80% RH (non condensing)
Humidity
Colour LCD Television
Horizontal: +18V
Current: Max. 500mA (overload protection)
31 – 69 kHz
59 – 86 Hz
ORDER No. PCZ1004053CE
TX-L42D25B
TX-L42D26B
LA02 Chassis
© Panasonic Corporation 2010.
Unauthorized copying and
distribution is a violation of law.

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Summary of Contents for Panasonic TX-L42D25B

  • Page 1 Vertical scanning frequency 59 – 86 Hz Receiving Chanels: UHF E21-E68 Aerial - Rear: Temperature : 0°C ÷ 35°C Operating Conditions: : 20% ÷ 80% RH (non condensing) Humidity © Panasonic Corporation 2010. Unauthorized copying and distribution is a violation of law.
  • Page 2 Intermediate Frequency: Video/Audio Video 38.9MHz Audio 32.90MHz 32.35MHz(NICAM) Colour 34.47MHz Terminals: AV1 IN Video (21 pin) 1V p-p 75Ω Audio (21 pin) 500mV rms 10kΩ RGB (21 pin) 0.7V p-p 75Ω AV1 OUT Video (21 pin) 1V p-p 75Ω Audio (21 pin) 500mV rms 1kΩ...
  • Page 3: Table Of Contents

    CONTENTS HOTEL MODE ............17 SAFETY PRECAUTIONS ........... 4 DATA COPY BY SD CARD........18 GENERAL GUIDE LINES........4 DATA COPY FROM TV SET TO SD CARD ..... 19 TOUCH – CURRENT CHECK....... 4 DATA COPY FROM SD CARD TO TV SET ..... 20 PREVENTION OF ELECTROSTATIC DISCHARGE OPTION BYTES DESCRIPTION ......
  • Page 4: 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 5: 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 6: 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 7: Applicable Signals

    Applicable Signals Component (Y, Pb, Pr), HDMI Signal name COMPONENT HDMI 525 (480) / 60i 525 (480) / 60p 625 (576) / 50i 625 (576) / 50p 750 (720) / 60p 750 (720) / 50p 1,125 (1,080) / 60i 1,125 (1,080) / 50i 1,125 (1,080) / 60p 1,125 (1,080) / 50p 1,125 (1,080) / 24p...
  • Page 8: Service Hints

    Service Hints How to remove the back cover Lay the main unit face down. (see Fig.5) Remove the 4 fixing screws and the pedestal assembly. (see Fig.6) SCREWS Fig.6 Remove the 28 fixing screws and the back cover. (see Fig.7) SCREWS SCREWS SCREWS...
  • Page 9: Chassis Board Layout

    Chassis Board Layout XW -BOARD P-UNIT A-BOARD TC-BOARD V-BOARD Board Name Function AV Terminal, HDMI, AV Switch, Sound Processor, Tuner DVB-T/C A-BOARD PC, LAN, OPT Terminal, GENX, EEPROM, ADV, Speaker out,USB slot V-BOARD Remote Receiver, R&G LED, Timer Rec LED, C.A.T.S. P-UNIT Power Supply,Main Input XW-BOARD...
  • Page 10: Technical Description

    How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds. TV will be forced to the factory shipment setting after this SELF CHECK. Model and Keys: Keys Model No. One-to_one CI PLUS DTCP-IP (for USB Rec.) TX-L42D25B None TX-L42D26B None...
  • Page 11: Setting Inspection

    Setting Inspection Voltage Confirmation A board Description Test point Voltage 5.8VS TP2750 5.8V +/- 2% STB_SUB_5.8V TP2789 5.8V +/- 2% TP2785 BL_SOS TP2780 P17V TP2782 18V +/- 2% SUB_F12V_15V TP2783 12V +/- 2% SUB3.3 V TP5503 3.21V - 3.45V SUB 1.5 V TP5502 1.47V - 1.56V SUB1.2V_A...
  • Page 12: Self Check

    (-/v) button on the TV set and press the STATUS button on the remote control. To exit Self Check, switch off the TV set at the power button. TX- L42D25B 42FHD Panasonic 2010LCD TX- L42D26B Self Check Complete DC5B O.K.
  • Page 13: 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 14: 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 SERVICE While pressing (-/v) button on the TV unit, press on the remote control for 3 times within 2 seconds.
  • Page 15: Service

    SERVICE SERVICE Peaks SOFT 2.006 OPTION 1 Key Command ADJUST Peaks EEP 01.03.0014 OPTION 2 WB-ADJ LSI PACKAGE 0.027 OPTION 3 OPTION LSI DATA 1.00.00 OPTION 4 00 • Press the 3/4 button to change the adjustment values or function. SRV-TOOL STBY SOFT 1.03.00...
  • Page 16: Service Tool Mode

    Service Tool Mode How to access Select [SRV-TOOL] in Service Mode. Press [OK] button on the remote control. SRV-TOOL Display of TD2Microcode version TD2Microcode:005a0910 Flash ROOM: AD – F1 Display of Flash ROM maker code POWER ON TIME/COUNT PTCT:00.00.00.00.00 Time 00051:30 On/Off 0000042 Display of SOS History Press [MUTE] button (3sec)
  • Page 17: 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 18: Data Copy By Sd Card

    Data Copy by SD Card Purpose a) Board replacement (Copy the data when exchanging A-board): When exchanging A-board, the data in original A-board can be copied to SD card and then copy to new A-board. Following data can be copied. (Before exchanging) User setting data Copy to SD card...
  • Page 19: Data Copy From Tv Set To Sd Card

    Data Copy from TV set to SD Card Turn on the TV set. Insert SD card with a startup file (pwd file) to SD slot. On-screen Display will be appeared according to the startup file automatically. Input a following password for (a) or (b) by using remote control. (a) For Board replacement: 2770 (b) For Hotel: 4850 Data will be copied from TV set to SD card.
  • Page 20: Data Copy From Sd Card To Tv Set

    Data Copy from SD Card to TV set Turn on the TV set. Insert SD card with Data to SD slot. On-screen Display will be appeared according to the Data folder automatically. Input a following password for (a) or (b) by using remote control. (a) For Board replacement: 2771 (b) For Hotel: 4851 Data will be copied from SD card to TV set.
  • Page 21: Option Bytes Description

    Option Bytes Description OPTION1 ATP Search Speed Slow (1) / Fast (0) TXT Ch Refresh On (1) / Off (0) ID-1 On (1) / Off (0) Macrovision Auto-Judge On (1) / Off (0) Surround enable low bit (*1) On (1) / Off (0) Surround enable low bit (*1) On (1) / Off (0) Pre Emphasis...
  • Page 22: Adjustment Method

    Adjustment Method Sub-Contrast/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 23: Wiring Diagram

    Wiring diagram LCD PANEL...
  • Page 24: Block Diagram

    Block Diagram (1/2) JK8701 JK8700A CN8940 TO XW BOARD USB1 USB0 CI SLOT 1 2 3 5 7 15 16 17 19 20 22 23 24 26 SUB CI 5V FE TS PARALLEL IC8300 IC8701 IC8700 (C1AB00003188) IC8400 IC8401 (C0DBZYY00266) (C0DBZYY00266) OFDM IC8360/1/2...
  • Page 25 Block Diagram (2/2) LCD PANEL RIGHT 60pin LEFT 60pin TO A10 VDD L16V VCC L3.3V SDA SCL DTV 15V STB 5.6V 1.2V DTV 15V SDA SCL SUB 3.3V 1.22V 3.3V 2.5V TO A88 TO A15...
  • Page 26: Parts Location

    Parts Location NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List. (UK)
  • Page 27 Parts Location NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
  • Page 28: Replacement Parts List

    Replacement Parts List Important Safety Notice Components Identified by mark have special characteristics important for safety. * When replacing any of these components, use only manufacturers specified parts. In case of ordering these spare parts, please always add the complete Model-Type number to your order. RTL (Retention Time Limited) Note: The marking (RTL) indicates that the Retention Time is Limited for this item.
  • Page 29 Cct Ref Parts Number Description Cct Ref Parts Number Description IC8300 C1AB00003188 DVB-T/C DEMODULATOR D5421 B0ACCJ000048 DIODE IC8302 C0DBFYY00041 REGULATOR D5422 B0BC010A0007 DIODE IC8360 C0JBAR000566 LOW VOLTAGE MULTIPLEXE D5423 B0ACCJ000048 DIODE IC8361 C0JBAR000566 LOW VOLTAGE MULTIPLEXE D5424 B0BC02400011 ZENER DIODE IC8362 C0JBAR000566 LOW VOLTAGE MULTIPLEXE...
  • Page 30 Cct Ref Parts Number Description Cct Ref Parts Number Description Q5502 B1MBDDA00003 TRANSISTOR L5000 J0JYC0000068 CHIP INDUCTOR Q5503 B1MBEDA00015 TRANSISTOR L5001 J0JYC0000068 CHIP INDUCTOR Q5504 B1CFRD000048 TRANSISTOR L5300 G1C6R8MA0416 COIL Q8400 DSC200100L TRANSISTOR L5500 G1C2R2M00022 COIL Q8401 DSC200100L TRANSISTOR L5501 G1C3R3Z00005 COIL Q9001...
  • Page 31 Cct Ref Parts Number Description Cct Ref Parts Number Description 4K7 Ω L8708 J0JHC0000045 COIL BLM18PG121SN1D R0949 D0GA472JA015 .063W 22 Ω L8850 J0JHC0000045 COIL BLM18PG121SN1D R0952 ERJ2GEJ220X .063W 22 Ω L8920 J0JHC0000075 COIL BLM21PG600SN1D R0953 ERJ2GEJ220X .063W 22 Ω L8921 J0JHC0000045 COIL BLM18PG121SN1D R0958...
  • Page 32 Cct Ref Parts Number Description Cct Ref Parts Number Description 47K Ω 100K Ω R2502 D0GA473JA015 .063W R3161 ERJ2GEJ104X .063W 22K Ω 100K Ω R2504 D0GA223JA015 .063W R3162 ERJ2GEJ104X .063W 47K Ω 100K Ω R2507 D0GA473JA015 .063W R3163 ERJ2GEJ104X .063W 10K Ω...
  • Page 33 Cct Ref Parts Number Description Cct Ref Parts Number Description 33 Ω 10K Ω R4670 D0GA330JA015 .063W R4792 ERJ2GEJ103X .063W 33 Ω 47K Ω R4672 D0GA330JA015 .063W R4793 D0GA473JA015 .063W 1K Ω 10K Ω R4676 ERJ2GEJ102X .063W R4794 ERJ2GEJ103X .063W 1K2 Ω...
  • Page 34 Cct Ref Parts Number Description Cct Ref Parts Number Description 10 Ω 68 Ω R5514 D0GB100JA041 0.1W R6757 D0GB680JA041 0.1W 10 Ω 10K Ω R5515 D0GB100JA041 0.1W R6758 ERJ3GEYJ103 0.1W 0 Ω 68 Ω R5516 D0GAR00Z0001 .063W R6759 D0GB680JA041 0.1W 10K Ω...
  • Page 35 Cct Ref Parts Number Description Cct Ref Parts Number Description 82 Ω 68 Ω R8112 D0GA820JA015 .063W R8380 D0GA680JA015 .063W 56 Ω 68 Ω R8114 D0GA560JA015 .063W R8385 D0GA680JA015 .063W 56 Ω 68 Ω R8115 D0GA560JA015 .063W R8386 D0GA680JA015 .063W 100 Ω...
  • Page 36 Cct Ref Parts Number Description Cct Ref Parts Number Description 68 Ω 56 Ω R8469 D0GA680JA015 .063W R8705 D0GA560JA015 .063W 10K Ω 56 Ω R8470 ERJ2GEJ103X .063W R8706 D0GA560JA015 .063W 10K Ω 56 Ω R8471 ERJ2GEJ103X .063W R8707 D0GA560JA015 .063W 10K Ω...
  • Page 37 Cct Ref Parts Number Description Cct Ref Parts Number Description 33 Ω 270 Ω R8877 D0GA330JA015 .063W R9104 D1BB2700A087 0.1W 10K Ω 47K Ω R8878 ERJ2GEJ103X .063W R9106 D1BB4702A055 0.1W 10K Ω 1K Ω R8879 ERJ2GEJ103X .063W R9107 D1BB1001A087 0.1W 10K Ω...
  • Page 38 Cct Ref Parts Number Description Cct Ref Parts Number Description 7K5 Ω 2K2 Ω R9262 D1BA7501A014 .063W R9366 D1BA2201A014 .063W 0 Ω 0 Ω R9263 D0GAR00Z0001 .063W R9369 D0GAR00Z0001 .063W 20 Ω 0 Ω R9264 D1BA20R0A014 .063W R9373 D0GAR00Z0001 .063W 100 Ω...
  • Page 39 Cct Ref Parts Number Description Cct Ref Parts Number Description C2775 F1G1H101A731 S.M.CAP 100pF C3148 F1J1A106A087 S.M.CAP 10µF C2778 F1G1C104A116 S.M.CAP 100nF C3149 F1H1A105A025 S.M.CAP 1µF C2779 F1K1C106A126 S.M.CAP 10µF C3150 F1H1A105A025 S.M.CAP 1µF C2780 F1H1E104A129 S.M.CAP 100nF C3151 F1H1A105A025 S.M.CAP 1µF C2781...
  • Page 40 Cct Ref Parts Number Description Cct Ref Parts Number Description C5500 F1G1E682A123 S.M.CAP 6.8nF C6735 F1J1E105A231 S.M.CAP 1µF C5501 F1G1A154A053 S.M.CAP 150nF C6736 F1H1H102A971 S.M.CAP C5502 F1J1A475A039 S.M.CAP 4.7µF C6748 F1H1H822A970 S.M.CAP 8.2nF C5503 F1H1A1050032 S.M.CAP 1000nF C6750 F1H1H102A971 S.M.CAP C5504 F1G1E682A123 S.M.CAP...
  • Page 41 Cct Ref Parts Number Description Cct Ref Parts Number Description C8012 F1G1C104A116 S.M.CAP 100nF C8085 F1J1A106A043 S.M.CAP 10µF C8013 F1G1C104A116 S.M.CAP 100nF C8087 F1G1C104A116 S.M.CAP 100nF C8015 F1J1A106A043 S.M.CAP 10µF C8088 F1G1C104A116 S.M.CAP 100nF C8016 F1G1C104A116 S.M.CAP 100nF C8089 F1G1C104A116 S.M.CAP 100nF C8017...
  • Page 42 Cct Ref Parts Number Description Cct Ref Parts Number Description C8246 F1G1A105A047 S.M.CAP 1000nF C8361 F1G1C104A116 S.M.CAP 100nF C8247 F1G1C104A116 S.M.CAP 100nF C8362 F1G1C104A116 S.M.CAP 100nF C8248 F1G1C104A116 S.M.CAP 100nF C8400 F1G1C104A116 S.M.CAP 100nF C8249 F1G1C104A116 S.M.CAP 100nF C8401 F1G1C104A116 S.M.CAP 100nF C8250...
  • Page 43 Cct Ref Parts Number Description Cct Ref Parts Number Description C9046 F1G1C104A116 S.M.CAP 100nF C9117 F1K0J226A008 S.M.CAP 6.3V 22µF C9047 F1G1C104A116 S.M.CAP 100nF C9119 F1J1E105A231 S.M.CAP 1µF C9048 F1G1C104A116 S.M.CAP 100nF C9125 F1G1C103A116 S.M.CAP 10nF C9049 F1G1C104A116 S.M.CAP 100nF C9126 F1G1C104A116 S.M.CAP 100nF...
  • Page 44 Cct Ref Parts Number Description Cct Ref Parts Number Description C9241 F1K1E106A136 S.M.CAP 10µF C9318 F1K1E106A136 S.M.CAP 10µF C9242 F1L1H105A059 S.M.CAP 1000nF C9319 F1K1E106A136 S.M.CAP 10µF C9243 F1K1E106A136 S.M.CAP 10µF C9325 F1H1H104A970 S.M.CAP 100nF C9247 F1H1C105A145 S.M.CAP 1000nF C9329 F1J1E105A231 S.M.CAP 1µF C9248...
  • Page 45 Cct Ref Parts Number Description Cct Ref Parts Number Description TTY0E0631-2 CABINET ASSY TBM0E2289 MODEL LABEL INSTRUCTION BOOKS TQB0E0981 ENGLISH I.C.s IC8950 X24CL42D26B EEPROM LDA2...
  • Page 46: Schematic Diagrams

    Schematic Diagrams 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 (Ω) (k=1,000, M=1,000,000) CAPACITORS All capacitors are ceramic 50V unless marked otherwise.
  • Page 81: Conductor Views

    Conductor Views A-BOARD TNPH0851 - TOP IC’S TRAN’S IC1101 5D Q2101 IC2301 1B Q2252 IC4700 3C Q3104 IC4701 3B Q3105 IC5000 5D Q4512 IC5200 3E Q4513 IC5220 1F Q4704 IC5280 5C Q4705 IC5300 2F Q5053 IC5604 3C Q5054 IC8000 2D Q5241 IC8240 2D Q5500...
  • Page 82 A-BOARD TNPH0851 - BOTTOM IC’S Q2254 IC1100 5C Q2301 IC2950 5A Q3100 IC2952 5A Q3101 IC3000 2B Q3102 IC5500 2E Q3103 IC5501 1E Q4700 IC5603 3C Q4701 IC8100 3D Q4702 IC8300 5B Q4703 IC8302 5A Q4709 IC8400 5E Q4710 Q5055 TRAN’S Q5240 Q2253...
  • Page 83 XW-BOARD TNPA5130 - TOP IC’S IC6700 3A IC6701 3C IC6702 4A IC6851 1C IC6852 3B IC6853 2B IC6854 2A IC6855 2C IC6856 2A IC6857 2B DIODE’S D6700 D6701 D6703 D6705 D6708 D6709 D6710 D6713 D6851 D6854 XW-BOARD TNPA5130 - BOTTOM DIODE’S D6702 D6706...
  • Page 84 TC-BOARD TNPA5195 - TOP IC’S IC9003 1D IC9006 2C IC9201 2B IC9202 1A IC9203 2C IC9205 2D IC9206 2D IC9207 2B IC9208 2C TRAN’S Q9008 Q9009 Q9202 Q9203...
  • Page 85 TC-BOARD TNPA5195 - BOTTOM IC’S IC9004 1A IC9005 1D IC9204 2B TRAN’S Q9001 Q9003 Q9007 Q9201 Q9204 Q9205 Q9206 Q9207 Q9208...
  • Page 86 V-BOARD TNPA5134 - TOP IC’S RM2500 1A TRAN’S Q2500 Q2501 Q2504...

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