Panasonic TC-20LA2 Service Manual
Panasonic TC-20LA2 Service Manual

Panasonic TC-20LA2 Service Manual

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Specifications

Power Source
Power Consumption
LCD
Screen Size
Channel Capability
Sound
Speaker
Headphones
FEATURES
Operating Conditions
Connection Terminals
INPUT
COMPONENT VIDEO INPUT
Dimensions ( W × H × D )
Including TV Stand
LH32 Chassis
AC 120 V, 60 Hz
Average use : 65 W
Stand-by condition : 0.11 W
Power off : 0.08 W
20-inch (510 mm), 4 : 3 aspect ratio LCD panel
16.06 " (408.0 mm) (W) × 12.05 " (306.0 mm) (H)
VHF-12 : UHF-56 : Cable-125
4 cm, 2 pcs, 16 W
M3 (3.5 mm) Jack × 1
3D Y/C Digital Comb Filter
CLOSED CAPTION
Temperature : 41 °F - 95 °F (5 °C - 35 °C)
Humidity : 5 % - 90 % RH (non-condensing)
VIDEO (RCA PIN Type × 1) × 2
S-VIDEO (MINI DIN 4pin × 1) × 2
AUDIO L-R (RCA PIN Type × 2) × 2
Y
P
/ P
B
R
AUDIO L-R (RCA PIN Type × 2)
19 39/64 " (498 mm) ×
19 59/64 " (506 mm) ×
10 9/32 " (260 mm) (TC-20LA2)
ORDER NO. ITD0403003C1
V-Chip
1.0 Vp-p (75 W)
Y : 1 Vp-p (75 W), C : 0.286 Vp-p (75
W)
0.5 Vrms
1.0 Vp-p (including synchronization)
± 0.35 Vp-p
0.5 Vrms
19 39/64 " (498 mm) ×
17 29/32 " (455 mm) ×
7 31/64 " (190 mm) (TC-20LA2D)
© 2004 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
Unauthorized
distribution is a violation of law.
B05
Canada:B07
LCD TV
copying
and

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Summary of Contents for Panasonic TC-20LA2

  • Page 1: Specifications

    19 39/64 “ (498 mm) × 19 39/64 “ (498 mm) × 19 59/64 “ (506 mm) × 17 29/32 “ (455 mm) × 10 9/32 “ (260 mm) (TC-20LA2) 7 31/64 “ (190 mm) (TC-20LA2D) © 2004 Matsushita Electric Industrial Co., Ltd. All rights reserved.
  • Page 2: Table Of Contents

    17 23/32 “ (450 mm) × 3 35/64 “ (90 mm) Mass (Weight) 16.8 lb. (7.6 kg) Net (TC-20LA2) 14.1 lb. (6.4 kg) Net (TC-20LA2D) Note: Design and specifications are subject to change without notice. Weight and dimensions shown are approximate.
  • Page 3: Safety Precautions

    TC-20LA2 / TC-20LA2D 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: About Lead Free Solder (Pbf)

    TC-20LA2 / TC-20LA2D Caution Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise hamless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).
  • Page 5: Self-Check Function

    TC-20LA2 / TC-20LA2D 4 Self-check function When phenomena like "the power fails from time to time" or "the video/audio fails from time to time" can not be confirmed at the time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also, when "the power fails from time to time", display on the screen can be used to confirm the occurrence and to limit the scope for...
  • Page 6: Chassis Board Layout

    TC-20LA2 / TC-20LA2D 5 Chassis Board Layout Board Name Function A-Board Main (AV Switch, Audio, MCU, Grobal Core, AV connector ) R-Board Remote Reciever, LED V-Board Headphone, Speaker TA-Board Tuner, MTS Power Unit Power (AC/DC), Switch None serviceable. Power Unit should be exchange for service.
  • Page 7: Servicing Method

    TC-20LA2 / TC-20LA2D 6 Servicing method 6.1. Removing the base metal 6.2. Removing the rear cover ass´y 1. Remove the base metal ass´y. (See 6.1.) 2. Remove the fixing screws (8pcs and 2pcs). 1. Lay down the main unit so that the rear cover faces upward.
  • Page 8: Removing The A-Board

    TC-20LA2 / TC-20LA2D 6.4. Removing the A-Board 6.6. Removing the R-Board 1. Remove the rear cover. (See 6.2.) 1. Remove the rear cover. (See 6.2.) 2. Remove the TA-Board. (See 6.3.) 2. Remove the fixing screws (4pcs). 3. Disconnect the couplers (A5, A8, A9 and A11).
  • Page 9: Removing The V-Board

    TC-20LA2 / TC-20LA2D 6.7. Removing the V-Board 6.9. Removing the main chassis 1. Remove the rear cover. (See 6.2.) 1. Remove the rear cover. (See 6.2.) 2. Remove the fixing screw (1pcs). 2. Remove the TA-Board. (See 6.3.) 3. Disconnect the couplers (V1 and V2).
  • Page 10: Adjustment Method

    TC-20LA2 / TC-20LA2D 7 Adjustment method 7.1. How to enter into adjustment mode While pressing [VOLUME-] button of the main unit, press [RECALL] button of the remote control transmitter three times in a row (within 2 seconds). 7.1.1. Adjustment method..Use the remote control.
  • Page 11: Lcd Gamma Adjustment

    TC-20LA2 / TC-20LA2D 7.5. LCD GAMMA Adjustment Instrument Name Connect to Remarks 1. Remote controller 2. LCD WB meter (Minolta CS-1000 equivalent) 3. Communication jig 4. Computer for external control · After 30 minutes aging complete white balance adjustment. 1. Enter into WB adjustment in the plant adjustment mode and measure the WHITE brightness data to check that it is higher than...
  • Page 12: Mts Adjustment

    TC-20LA2 / TC-20LA2D 7.6. MTS Adjustment Caution: MTS adjustment shall be after the aging of 30 minutes or longer. 7.6.1. RF Audio Input level Adjustment Instrument name Connection Remarks 1. Filter jig TP3572 - GND 2. RF signal generator RF ANT. INPUT 3.
  • Page 13: Conductor Views

    A-Board Main (AV Switch, Audio, MCU, Grobal Core, AV connector ) R-Board Remote Reciever, LED V-Board Headphone, Speaker TA-Board Tuner, MTS Power Unit Power (AC/DC), Switch None serviceable. Power Unit should be exchange for service. TOP PREVIOUS NEXT http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s0500000000x.html 4/24/2008...
  • Page 14 Page 1 of 1 http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/ex_parts.gif 4/24/2008...
  • Page 15 N0AB4GH00005 POWER UNIT TBMA148 PANASONIC BADGE TBLG3037 SET LEG RUBBER TC-20LA2D only TBXA42901 POWER BUTTON TBXA43002 CONTROL BUTTON TEJA081 LOCK HINGE(RIGHT) TC-20LA2 only TEJA082 LOCK HINGE(LEFT) TC-20LA2 only TEJF016 SHAFT TC-20LA2 only TESA221 SPRING TESA230 SPRING TKLA0901 PHOTO STAND METAL...
  • Page 16: R, V And Ta-Board

    Page 2 of 2 TTYA0631 CABINET ASS’Y TC-20LA2 only TTYA0636 CABINET ASS’Y TC-20LA2D only TXFKX010F91 PHOTO STAND WITH SET LEG RUBBER TC-20LA2D only TXFKZ010F81 TILT BASE ASS’Y TC-20LA2 only XTB4+10F SCREW XTB4+10J SCREW XTB4+15J SCREW XTV3+12J SCREW XTW3+10T SCREW XYN3+F6...
  • Page 17: Block And Schematic Diagrams

    C 1UF, Z, 10V C932 ECJ1XF1C104Z C 0.1UF, Z, 16V C933 ECEA1CKA101B E 100UF, 16V C936 ECA1HM100 E 10UF, 50V C937-39 ECJ1VF1A105Z C 1UF, Z, 10V C1003 EEEHB0G101R C 100PF, J, 4V C1004 EEEHB1C470P C 47PF, J, 16V http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 18: Power Block Diagram

    C 0.1UF, K, 16V C2015 ECA1VM221 E 220UF, 35V C2017 ECA1HM100 E 10UF, 50V C2018 ECJ2YF1C225Z C 22PF, Z, 16V C2019 ECJ1VB1C333K C 0.033UF, K, 16V C2020 ECJ2YF1C225Z C 22PF, Z, 16V C2021 ECJ1VB1C333K C 0.033UF, K, 16V http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 19: Signal Block Diagram

    C 1000PF, K, 50V C3103 ECJ2XB0J106M C 10UF, Z, 5V C3112 ECJ2XB0J106M C 10UF, Z, 5V C4088-90 ECJ1VC1H330J C 33PF, J, 50V C4091-96 ECJ1VC1H560J C 56PF, J, 50V C4097-99 ECJ1XF1C104Z C 0.1UF, Z, 16V C4100 ECJ2XB0J106M C 10UF, Z, 5V http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 20: A-Board (1 Of 5) Schematic Diagram

    C 1UF, K, 16V C4204 ECJ1XC1H471J C 470PF, J, 50V C4205 ECJ1VB1H103K C 0.01UF, K, 50V C4206,07 ECJ1VB0J105K C 1UF, K, 16V C4208 ECJ1VB1C104K C 0.1UF, K, 16V C4209,10 ECJ1VC1H180J C 18PF, J, 50V C4211-25 ECJ1VB1C104K C 0.1UF, K, 16V http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 21: A-Board (2 Of 5) Schematic Diagram

    MA728 DIODE MA2J728 D1006 MA8062MTX ZENER DIODE MAZ80620ML D1007 MA728 DIODE MA2J728 D1300,01 MAZ8043M ZENER DIODE D1302 LNH101WHKAF4 LED D2001 MA111 DIODE MA2J111 D2003,04 MA111 DIODE MA2J111 D3026,27 MA8140M ZENER DIODE MAZ81400M IC901 C0DAAZG00006 IC902 C0DBEZE00005 IC903 C0CBAYF00004 http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 22: A-Board (3 Of 5) Schematic Diagram

    L4007 J0JCC0000241 CHIP INDUCTOR L4008 TALC168T100K CHIP INDUCTOR COIL G1C100KA0009 L4009 ELJPA220KF CHIP INDUCTOR L4010 J0JGC0000021 CHIP INDUCTOR COIL L4011 TALC168T100K CHIP INDUCTOR COIL G1C100KA0009 L4012-16 J0JCC0000241 CHIP INDUCTOR L4018,19 J0JCC0000241 CHIP INDUCTOR L4020-23 J0JGC0000021 CHIP INDUCTOR COIL http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 23: A-Board (4 Of 5) Schematic Diagram

    M 820 OHM, J, 1W R907 ERJ8GEY0R00 M 0 OHM, 1/8W R908 ERJ6ENF4871 M4.87KOHM, 1/10W R909 ERJ6ENF8200 M 820 OHM, 1/10W R912 ERJ8GEY0R00 M 0 OHM, 1/8W R913 ERJ6ENF1651 M1.65KOHM, 1/10W R914 ERJ6ENF1001 M 1KOHM, 1/10W R916 ERJ6ENF4530 M 453 OHM, 1/10W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 24: A-Board (5 Of 5) Schematic Diagram

    R1040 ERJ3GEYJ473 M 47KOHM,J,1/16W R1041 ERJ3GEY0R00 M 0 OHM, 1/16W R1042 ERJ3GEYJ394 M 390KOHM,J,1/16W R1044 ERJ3GEY0R00 M 0 OHM, 1/16W R1045 ERJ3GEYJ183 M 18KOHM,J,1/16W R1047 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R1048-51 ERJ3GEYJ103 M 10KOHM,J,1/16W R1053 ERJ3EKF7151 M7.15KOHM, 1/16W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 25: R, V And Ta-Board Schematic Diagram

    ERJ3GEYJ104 M 100KOHM,J,1/16W R2005 ERJ3GEYJ103 M 10KOHM,J,1/16W R2006 ERJ3GEYJ104 M 100KOHM,J,1/16W R2008 ERJ3GEYJ222 M 2.2KOHM,J,1/16W R2009 ERJ3GEYJ104 M 100KOHM,J,1/16W R2010 ERJ3GEYJ105 M 1MOHM,J,1/16W R2011 ERJ3GEYJ102 M 1KOHM,J,1/16W R2012 ERJ12YJ560 M 56 OHM,J, 1/2W R2013,14 ERJ12YJ1R5U M 1.5OHM, J,1/2W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 26 M 220 OHM,J,1/16W R3042 ERJ3GEYJ102 M 1KOHM,J,1/16W R3043 ERJ3GEYJ221 M 220 OHM,J,1/16W R3044 ERJ3GEYJ102 M 1KOHM,J,1/16W R3046 ERJ3GEYJ102 M 1KOHM,J,1/16W R3047 ERJ3GEYJ221 M 220 OHM,J,1/16W R3048-50 ERJ3GEYJ102 M 1KOHM,J,1/16W R3051 ERJ3GEYJ221 M 220 OHM,J,1/16W R3052,53 ERJ3GEYJ220 M 22 OHM,J,1/16W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 27: Parts Location & Mechanical Replacement Parts List

    M 2.7KOHM, 1/16W R4174 ERJ3EKF4700 M 470 OHM, 1/16W R4175 ERJ3EKF2701 M 2.7KOHM, 1/16W R4176-78 ERJ3EKF1500 M 150 OHM, 1/16W R4181 ERJ3GEY0R00 M 0 OHM, 1/16W R4183 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R4184 ERJ3GEY0R00 M 0 OHM, 1/16W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 28: Packing Exploded View

    NETWORK RESISTER R4263 ERD25V0T M OHM, 1/10W R4264,65 EXB38V101J RESISTOR ARRAY R4268,69 EXB38V101J RESISTOR ARRAY R4272,73 EXB38V101J RESISTOR ARRAY R4275-77 ERJ3GEY0R00 M 0 OHM, 1/16W R4280-89 ERJ3GEY0R00 M 0 OHM, 1/16W R4290 ERJ3GEYJ333 M 33KOHM,J,1/16W R4291 ERJ3GEYJ563 M 56KOHM,J,1/16W http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 29: Mechanical Replacement Parts List

    TXN/V10KYJ CIRCUIT BOARD V TXNTA10KYJ CIRCUIT BOARD TA TA1,A2 K1KB09B00019 9P CONNECTOR TU001 ENG36A16GF TUNER TJS1A8140 PHONO PIN (8P) K1KA08B00064 TJS1A8100 PHONO PIN (4P) K1KA04B00056 X1001 H0J400400017 CRYSTAL X4001 H0J202500011 CRYSTAL ZA4001-04 TESA169 SHIELD CLIP TOP PREVIOUS NEXT http://tsn.pstc.panasonic.com/viewing/NA/TC-20LA2/SVC/s1102000000.html 4/24/2008...
  • Page 30: Replacement Parts List

    9 Block and Schematic Diagrams 9.1. Schematic Diagram Notes...
  • Page 32 VDDE VDDE CONT VDDE VDDE AVDPL2 59 AVDPL1 Q4035 IC1003 IC1002 STB 3.3V RESET EEPROM VOUT IC1001 TEST Q4306 PANEL ON 30 IREF 31 COMP REMOTE AVDD LED_G LED_R 54 KEY 58 BS_ON 52 INV_ON A-BOARD TC-20LA2/2D Power Block Diagram...
  • Page 33 79 AVDPL1 CONT AVDPL2 +14V +14V +14V +14V +14V +14V ON/OFF PANEL 5V LCD PANEL PANEL 5V RM001 D1302 REMOTE RECEIVER G LED R LED STB 3.3V REMOTE VOUT LED_G Q1302 Q1300 LED_R Q1303 Q1301 R-BOARD TC-20LA2/2D Power Block Diagram...
  • Page 34 C/Pb AFT OUT Q4014,Q4019,Q4027 TV L Q4015,Q4020,Q4025 TV R IC2201 Q3001,Q3006,Q3008 Q4016,Q4021,Q4024 56 V SCL1-5 SCL1 AUDIO OUT SDA1-5 SDA1 VIDEO OUT LOUT MPX IN ROUT SDA 19 SDA2 26 S SCL2 Q001 TV V TA-BOARD TC-20LA2/2D Signal Block Diagram...
  • Page 35 MDO02 MDO03 LCDG0 LCDG7 RX0+ 33 MDIN10 RX0- MDO10 RX1+ MDIN00 MDO00 RX1- MDIN07 MDO07 RX2+ SDA2 26 SDA MDIN08 MDO08 LCDB0 LCDB7 SCL2 RX2- MDIN15 MDO15 RX3+ SDA2 RX3- SCL2 TCLK+ RXCLK+ NRST TCLK- RXCLK- TC-20LA2/2D Signal Block Diagram...
  • Page 36 180k JK3004 K2HA204A0038 COMPONENT AE_LINE3 R3019 R3023 AE_SW AA_SCL1 AA_SDA1 C3019 6.3V AE_Y Y-SW C3017 R3020 R3092 AE_PB C3018 DC_OUT R3093 R3021 PB-G AE_PR PR-G R3094 R3022 JK3002A K2HA307A0008 COMPONENT R060 AG_R1 AG_L1 TC-20LA2/2D A-Board (1 of 5) Schematic Diagram...
  • Page 37 SDA1 IC1011 AGC_CONT C0JBAS000099 SWITCHING MAIN5V C056 16V 0.1u 30.2 R060 BT30V R061 AB_TV1V TV1_V C055 AG_R1 D051 0.1u MAZ81000HL D052 C053 MAZ81000ML TA-BOARD R059 4.7u D053 U/V TUNER (TA2) MAZ81000ML R052 AG_L1 TC-20LA2/2D A-Board (1 of 5) Schematic Diagram...
  • Page 38 9.5. A-Board (2 of 5) Schematic Diagram TC-20LA2/2D A-Board (2 of 5) Schematic Diagram...
  • Page 39 TC-20LA2/2D A-Board (2 of 5) Schematic Diagram...
  • Page 40 AVDPL1 HPOU 50V 0.01u MDHIN C4193 VCI1 MDVIN TEST VPOU 6.3V VDDE CPO1 LCDMUT JS4011 C4190 R4218 R4219 6.3V 2.2k JS4012 MCLK MHPO MVPO JPEG REC601 C4229 50V 0.01u JS4016 C4228 R4238 6.3V TC-20LA2/2D A-Board (3 of 5) Schematic Diagram...
  • Page 41 AB_LCD_B1 AC_LCD_B1 AB_LCD_B2 AC_LCD_B2 AB_LCD_B3 AC_LCD_B3 C4261 AB_LCD_B4 AC_LCD_B4 C4229 50V 0.01u AB_LCD_B5 AC_LCD_B5 AB_LCD_B6 AC_LCD_B6 AB_LCD_B7 AC_LCD_B7 R4240 JS4016 C4228 R4238 C4246 C4247 2.2k 6.3V 6.3V R4273 0.01u EXB38V101JV GLP to LVDS TC-20LA2/2D A-Board (3 of 5) Schematic Diagram...
  • Page 42 R4277 0 TCLK- R4287 0 AC_LCD_B7 TCLK+ R4288 0 AC_LCD_B1 R4289 0 AC_LCD_B2 C4277 C4280 LVDS_GND 0.01u 0.1u AC_LCD_B3 PLL_GND AC_LCD_B4 PLL_VCC AC_LCD_B5 R4290 PLL_GND R4276 0 /PDWN R4291 CLK_IN R4292 IC4018 C0JBCZ000512 LVDS TC-20LA2/2D A-Board (4 of 5) Schematic Diagram...
  • Page 43 281 0 PANEL_5V 282 0 283 0 Rx3+ Rx3- 284 0 285 0 RxCLK+ 286 0 RxCLK- 287 0 288 0 Rx2+ 289 0 Rx2- Rx1+ Rx1- R4290 Rx0+ R4291 Rx0- R4297 R4296 TC-20LA2/2D A-Board (4 of 5) Schematic Diagram...
  • Page 44 9.8. A-Board (5 of 5) Schematic Diagram TC-20LA2/2D A-Board (5 of 5) Schematic Diagram...
  • Page 45 TC-20LA2/2D A-Board (5 of 5) Schematic Diagram...
  • Page 46 R2206 0.1u 470u R OUT R002 R009 R2204 C006 CONTRAST C027 R007 0.01u 0.22u TP014 L001 TP020 ERD25V0T Q001 TP015 2SA207700L IC2201 TP013 AN5849S-E1 TP012 TP011 TP010 TP016 TA-BOARD TXN A-BOARD A-BOARD (A1) (A2) TC-20LA2/2D R,V and TA-Board Schematic Diagram...
  • Page 47 50V 0.022u C2210 WB DET 10V 1u C2211 WB TIME 25V 10u C2212 OFFCAN2 4.7u C2213 L OUT OFFCAN1 10V 2.2u R OUT OSD-B in CONTRAST Ys in YM in IC2201 AN5849S-E1V ARD TXNTA10KYJ TC-20LA2/2D R,V and TA-Board Schematic Diagram...

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