Panasonic TX-L42G20E Service Manual

Panasonic TX-L42G20E Service Manual

Hide thumbs Also See for TX-L42G20E:

Advertisement

Service Manual
Specifications
Power Source:
Rated Power Consumption:
Stand-by Power Consumption: 0.25W (Without monitor out recording)
Aerial Impedance:
Receiving System:
PC signals:
Receiving Chanels:
Aerial - Rear:
Operating Conditions:
Intermediate Frequency:
Video/Audio
Video
Audio
Colour
220-240V AC, 50Hz
188W
17W (With monitor out recording)
75Ω unbalanced, Coaxial Type
PAL-I/H, B/G, D/K
SECAM B/G, D/K, L/L'
PAL-525/60 (AV only)
DVB-T (Digital Terrestrial Services (MPEG2 and MPEG4-AVC(H.264))
DVB-C (Digital cable services (MPEG2 and MPEG4-AVC(H.264))
M.NTSC (AV only)
NTSC (AV only)
VGA, SVGA, WVGA, XGA, SXGA, WXGA (compressed)
Horizontal scanning frequency
Vertical scanning frequency
VHF E2-E12
VHF A-H (ITALY)
VHF R3-R5
UHF E21-E69
CATV S1-S10 (M1-M10)
CATV S21-S41 (Hyperband)
/
VHF
UHF
Temperature :0°C ÷ 35°C
:20% ÷ 80% RH (non condensing)
Humidity
38.9MHz, 33.9MHz
33.4MHz (B/G), 33.16MHz (A2)
33.05MHz (NICAM B/G, D/K, L')
32.4MHz (D/K), 32.66MHz (CZ STEREO)
40.4MHz (L'), 39.75MHz (L' NICAM)
34.47MHz (PAL)
34.5MHz, 34.65MHz (SECAM)
38.3MHz, 38.15MHz (SECAM L')
Colour LCD Television
TX-L42G20E
TX-L42G20ES
TX-LF42G20S
GLP25 Chassis
31 – 69 kHz
59 – 86 Hz
VHF H1-H2 (ITALY)
VHF R1-R2
VHF R6-R12
CATV (S01-S05)
CATV S11-S20 (U1-U10)
ORDER No. PCZ1005063CE
© Panasonic Corporation 2010.
Unauthorized copying and
distribution is a violation of law.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the TX-L42G20E and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for Panasonic TX-L42G20E

  • Page 1 33.4MHz (B/G), 33.16MHz (A2) 33.05MHz (NICAM B/G, D/K, L’) 32.4MHz (D/K), 32.66MHz (CZ STEREO) 40.4MHz (L’), 39.75MHz (L’ NICAM) Colour 34.47MHz (PAL) 34.5MHz, 34.65MHz (SECAM) 38.3MHz, 38.15MHz (SECAM L’) © Panasonic Corporation 2010. Unauthorized copying and distribution is a violation of law.
  • Page 2 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 AV2 IN Video (21 pin) 1V p-p 75Ω...
  • Page 3: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ................4 GENERAL GUIDE LINES..............4 TOUCH – CURRENT CHECK.............. 4 PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES ......5 ABOUT LEAD FREE SOLDER (PBF)............6 SUGGESTED PB FREE SOLDER............6 APPLICABLE SIGNALS................7 SERVICE HINTS ..................
  • 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 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 Fig.6 Remove the 17 fixing screws. (see Fig.7) SCREWS SCREWS Fig.7...
  • Page 9: Chassis Board Layout

    Chassis Board Layout TC-BOARD G-UNIT P-BOARD A-BOARD V-BOARD Board Name Function AV Terminal, HDMI, AV Switch, Sound Processor, TV tuner, PC, LAN, A-BOARD OPT Terminal, GENX, EEPROM, ADV,LDA2, Speaker out,USB slot P-BOARD Power Supply, Main Input V-BOARD Remote Receiver, C.A.T.S., R/G LED G-UNIT Side AV3 Terminal TC-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-L42G20E TX-L42G20ES TX-LF42G20S None...
  • Page 11: Setting Inspection

    Setting Inspection Voltage Confirmation A board Description Test point Voltage SUB1.8V TP5601 1.76V – 1.87V SUB1.2V TP5600 1.18V – 1.29V SUB3.3V TP5602 3.19V – 3.39V SUB5V TP5200 4.9V – 5.1V SUB9V TP5220 8.82V – 9.27V STB5V TP5400 4.9V – 5.1V TC board Description Test point...
  • Page 12: Self-Check

    Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep pressing the down (-/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. Panasonic 2010LCD 42FHD TX-L42G20E Self Check Complete C71D 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 TV unit, press on the remote control for 3 times within 2 seconds.
  • Page 15: Service

    SERVICE SERVICE Peaks SOFT 2.005 OPTION 1 Key Command ADJUST Peaks EEP 01.00.0005 OPTION 2 WB-ADJ LSI PACKAGE 0.024 OPTION 3 OPTION LSI DATA 0.02.09 OPTION 4 • STBY SOFT 1.00.00 Model ID SRV-TOOL Press the 3/4 button to change the adjustment values or function. STBY EEP 1.08.3600 03087100...
  • 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 Display of Flash ROM maker code Flash ROOM: AD – F1 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 Tv Set 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 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 CS-1000A equivalent) CA-210 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 Diagrams

    Block Diagram (1/3) JK8401 JK8700 JK8701 USB1 USB0 CI SLOT SUB CI 5V IC8300 IC8701 IC8700 (C1AB00003188) IC8400 IC8401 (C0DBZYY00266) (C0DBZYY00266) OFDM POWER SUPPLY (C1AB00003193) (C1AB00002913) POWER SUPPLY IFD1/2 37,38 CI TS ASIC LEVEL SHIFER ASIC 30,42,7 28,32,44 TNR5V 64,15 2.5V 32,40 22,10...
  • Page 25 Block Diagram (2/3) LCD PANEL RIGHT 60pin LEFT 60pin VDD L16V VCC L3.3V SDA SCL SDA SCL 1.22V 3.3V 2.5V TO A10 TC05 TO A15...
  • Page 26 Block Diagram (3/3) TO INVERTER TO INVERTER TO A09 MAIN IN...
  • Page 27: Parts Location

    Parts Location NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
  • Page 28 NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
  • Page 29: 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 30 Cct Ref Parts Number Description Cct Ref Parts Number Description IC9006 MN85061 ZWEI2 D2772 B0ACCJ000048 DIODE IC9201 C1AB00003252 TFL LCD PANEL CONTROLL D2773 B0ACCJ000048 DIODE IC9202 24TCON42G20 EEPROM PANEL D2774 DZ2J062M0L DIODE IC9203 C0CBCAG00031 REGULATOR D2775 DZ2J062M0L DIODE IC9204 C1AB00003246 LEVEL SHIFTER D2776 B0ACCJ000048...
  • Page 31 Cct Ref Parts Number Description Cct Ref Parts Number Description Q3104 B1ABCF000231 TRANSISTOR L3110 J0JCC0000287 COIL Q3105 B1ABCF000231 TRANSISTOR L3111 J0JCC0000287 COIL Q4512 B1HFCFA00026 TRANSISTOR L3112 J0JCC0000287 COIL Q4513 B1ADCE000022 TRANSISTOR L3113 J0JCC0000287 COIL Q4700 B1ABCF000231 TRANSISTOR L3114 J0JCC0000287 COIL Q4701 B1ABCF000231 TRANSISTOR...
  • Page 32 Cct Ref Parts Number Description Cct Ref Parts Number Description 0 Ω L8401 J0JHC0000045 COIL BLM18PG121SN1D JS8367 D0GAR00Z0001 .063W 0 Ω L8701 J0JHC0000045 COIL BLM18PG121SN1D JS8368 D0GAR00Z0001 .063W 0 Ω L8702 J0JHC0000045 COIL BLM18PG121SN1D JS8369 D0GAR00Z0001 .063W 0 Ω L8705 J0JHC0000045 COIL BLM18PG121SN1D JS8370...
  • Page 33 Cct Ref Parts Number Description Cct Ref Parts Number Description 10K Ω 47K Ω R870 D0GD103JA036 .125W R1515 D0GA473JA015 .063W 1K2 Ω 47K Ω R871 ERJ6RBD122 0.1W R1516 D0GA473JA015 .063W 20K Ω 10K Ω R872 ERJ6RBD203V 0.1W R1520 ERJ2GEJ103X .063W 2K4 Ω...
  • Page 34 Cct Ref Parts Number Description Cct Ref Parts Number Description 220 Ω 100 Ω R3013 ERJ2GEJ221X .063W R3191 D0GA101JA015 .063W 4K7 Ω 82 Ω R3101 D0GA472JA015 .063W R3192 D0GA820JA015 .063W 4K7 Ω 82 Ω R3102 D0GA472JA015 .063W R3193 D0GA820JA015 .063W 75 Ω...
  • Page 35 Cct Ref Parts Number Description Cct Ref Parts Number Description 47K Ω 56K Ω R4733 D0GA473JA015 .063W R5054 D0GA563JA015 .063W 10K Ω 20K Ω R4734 ERJ2GEJ103X .063W R5055 D0GA203JA015 .063W 10K Ω 10K Ω R4735 ERJ2GEJ103X .063W R5056 ERJ2GEJ103X .063W 47K Ω...
  • Page 36 Cct Ref Parts Number Description Cct Ref Parts Number Description 10K Ω 47K Ω R8119 ERJ2GEJ103X .063W R8430 D0GA473JA015 .063W 22 Ω 10K Ω R8120 ERJ2GEJ220X .063W R8431 ERJ2GEJ103X .063W 0 Ω 10K Ω R8122 D0GAR00Z0001 .063W R8432 ERJ2GEJ103X .063W 0 Ω...
  • Page 37 Cct Ref Parts Number Description Cct Ref Parts Number Description 68 Ω 10K Ω R8508 D0GA680JA015 .063W R8748 ERJ2GEJ103X .063W 68 Ω 0 Ω R8509 D0GA680JA015 .063W R8753 D0GBR00Z0002 0.1W 68 Ω 10K Ω R8510 D0GA680JA015 .063W R8754 ERJ2GEJ103X .063W 10K Ω...
  • Page 38 Cct Ref Parts Number Description Cct Ref Parts Number Description 0 Ω 100 Ω R9020 D0GBR00Z0002 0.1W R9208 D0GA101JA015 .063W 22 Ω 100 Ω R9021 ERJ2GEJ220X .063W R9209 D0GA101JA015 .063W 22 Ω 100 Ω R9022 ERJ2GEJ220X .063W R9210 D0GA101JA015 .063W 10K Ω...
  • Page 39 Cct Ref Parts Number Description Cct Ref Parts Number Description 2R2 Ω R9303 D1BA2R20A014 .063W C822 ECQE6474JFB FILM 630V 470nF 2R2 Ω R9306 D1BA2R20A014 .063W C823 F1H1A1050028 CERAMIC 1µF 1000K Ω R9307 D1BA1004A014 .063W C826 F2A2W121A182 ELECT 450V 120µF 1000K Ω R9308 D1BA1004A014 .063W...
  • Page 40 Cct Ref Parts Number Description Cct Ref Parts Number Description C2108 F1G1A105A047 S.M.CAP 1000nF C3113 F1J1A106A087 S.M.CAP 10µF C2314 F1J1E105A231 S.M.CAP 1µF C3116 F1J1A106A087 S.M.CAP 10µF C2315 F1K1E106A136 S.M.CAP 10µF C3117 F1J1A106A087 S.M.CAP 10µF C2316 F1H1H104A970 S.M.CAP 100nF C3118 F1J1A106A087 S.M.CAP 10µF C2317...
  • Page 41 Cct Ref Parts Number Description Cct Ref Parts Number Description C4713 F1G1C104A116 S.M.CAP 100nF C5537 F1K0J226A008 S.M.CAP 6.3V 22µF C4716 F1G1C104A116 S.M.CAP 100nF C5538 F1K0J226A008 S.M.CAP 6.3V 22µF C4717 F1J1A475A087 S.M.CAP 4.7µF C5539 F1K0J226A008 S.M.CAP 6.3V 22µF C4718 F1J1A475A087 S.M.CAP 4.7µF C5649 F1H1A105A025...
  • Page 42 Cct Ref Parts Number Description Cct Ref Parts Number Description C8065 F1G1C104A116 S.M.CAP 100nF C8141 F1G1C104A116 S.M.CAP 100nF C8066 F1G1C104A116 S.M.CAP 100nF C8142 F1G1C104A116 S.M.CAP 100nF C8067 F1G1C104A116 S.M.CAP 100nF C8143 F1G1C104A116 S.M.CAP 100nF C8068 F1G1C104A116 S.M.CAP 100nF C8144 F1G1C104A116 S.M.CAP 100nF C8069...
  • Page 43 Cct Ref Parts Number Description Cct Ref Parts Number Description C8293 F1G1C104A116 S.M.CAP 100nF C8863 F1J0G226A001 S.M.CAP 22µF C8300 F1G1C104A116 S.M.CAP 100nF C8878 F1G1H471A730 S.M.CAP 470pF C8301 F1G1C104A116 S.M.CAP 100nF C8879 F1G1H471A730 S.M.CAP 470pF C8303 F1G1C104A116 S.M.CAP 100nF C8922 F1G1C104A116 S.M.CAP 100nF C8304...
  • Page 44 Cct Ref Parts Number Description Cct Ref Parts Number Description C9092 F1G1C104A116 S.M.CAP 100nF C9219 F1G1C104A116 S.M.CAP 100nF C9093 F1G1C104A116 S.M.CAP 100nF C9220 F1G1C104A116 S.M.CAP 100nF C9094 F1G1C104A116 S.M.CAP 100nF C9221 F1G1C104A116 S.M.CAP 100nF C9095 F1G1C104A116 S.M.CAP 100nF C9222 F1G1C104A116 S.M.CAP 100nF C9097...
  • Page 45 Cct Ref Parts Number Description Cct Ref Parts Number Description C9293 F1K1H475A210 S.M.CAP 4700nF TC01-PAN TSXM098 ZWEI FFC WIRE C9297 F1G1C104A116 S.M.CAP 100nF TC04 K1MN60BA0126 60P CONNECTOR C9298 F1K1E106A136 S.M.CAP 10µF TC04-PAN TSXM098 ZWEI FFC WIRE C9299 F1J1A106A043 S.M.CAP 10µF TC05 K1KB51BA0074 51P CONNECTOR...
  • Page 46 Cct Ref Parts Number Description Cct Ref Parts Number Description TQB0E0946M BULGARIAN TQB0E0946N ROMANIAN TQB0E0946O LATVIAN TQB0E0946P POLISH TQB0E0946Q HUNGARIAN TQB0E0946R CZECH TQB0E0946S GREEK TQB0E0946T TURKISH TQB0E0946U ENGLISH TQB0E0946V CROATIAN TQB0E0946W SLOVAKIAN TQB0E0946X TQB0E0946Z ESTONIAN I.C.s IC8950 X24CL42G20E EEPROM LDA2 DIFFERENCES FOR MODEL TX--LF42G20S EXPLODED VIEW A-LF42G20S...
  • Page 47: 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 80: Conductor Views

    Conductor Views A-BOARD TNP8EA107 - TOP IC’S Q4704 IC2301 1B Q4705 IC4700 3C Q4709 IC5000 6D Q5053 IC5280 1A Q5054 IC8000 3C Q5055 IC8240 2D Q5500 IC8241 2D Q5501 IC8700 6A Q5502 IC8701 3B Q5503 IC8921 5E Q5504 TRAN’S Q2301 DIODE’S Q4513 D3300...
  • Page 81 A-BOARD TNP8EA107 - BOTTOM IC’S TRAN’S IC1100 5C Q2101 IC1101 6D Q2252 IC2950 5A Q2253 IC2952 5A Q2254 IC3000 2B Q3100 IC4701 4C Q3101 IC5200 1B Q3102 IC5220 1A Q3103 IC5300 1A Q3104 IC5500 3E Q3105 IC5501 1C Q4512 IC5603 3C Q4700 IC5604 4C Q4701...
  • Page 82 P-BOARD TNP8EP103 - TOP IC’S D808 IC801 D814 IC802 D815 IC803 D816 IC804 D818 D819 TRAN’S D823 Q801 D824 Q804 D825 Q805 D827 D829 DIODE’S D830 D800 D834 D805 D837 D806 D841 D807...
  • Page 83 P-BOARD TNP8EP103 - BOTTOM IC’S D803 IC800 D804 D809 TRAN’S D810 Q800 D811 Q802 D812 Q803 D813 Q806 D821 Q807 D822 D826 DIODE’S D835 D801 D836...
  • Page 84 TC-BOARD TNP8ETC01 - 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 TNP8ETC01 - BOTTOM IC’S IC9004 1A IC9005 1D IC9204 2B TRAN’S Q9001 Q9003 Q9007 Q9201 Q9204 Q9205 Q9206 Q9207 Q9208...
  • Page 86 V-BOARD TNP8EV103 - TOP IC’S RM2500 1A TRAN’S Q2500 Q2501 Q2504...

This manual is also suitable for:

Tx-l42g20esTx-lf42g20s

Table of Contents