hit counter script
Panasonic TC-20LA5 Service Manual
  1. Manuals
  2. Brands
  3. Panasonic Manuals
  4. LCD TV
  5. TC20LA5 - 20" LCD COLOR TV
  6. Service manual
Panasonic TC-20LA5 Service Manual

Panasonic TC-20LA5 Service Manual

Chassis: lh32g
Hide thumbs Also See for TC-20LA5:
Table of Contents

Advertisement

Quick Links

Download this manual
Specifications
Power Source
Power Consumption
LCD
Screen Size
Channel Capability
Sound
Speaker
Headphones
FEATURES
Operating Conditions
TC-20LA5
TC-20LE5
LH32G Chassis
AC 120 V, 60 Hz
Average use : 56 W
Stand-by condition : 0.11 W
Power off : 0.10 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)
ORDER NO. ITD0503008CE
V-Chip
© 2005 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
Unauthorized
distribution is a violation of law.
B05
Canada:B07
LCD TV
copying
and

Advertisement

Table of Contents
loading

Related Manuals for Panasonic TC-20LA5

Summary of Contents for Panasonic TC-20LA5

  • Page 1 ORDER NO. ITD0503008CE Canada:B07 LCD TV TC-20LA5 TC-20LE5 LH32G Chassis Specifications Power Source AC 120 V, 60 Hz Power Consumption Average use : 56 W Stand-by condition : 0.11 W Power off : 0.10 W 20-inch (510 mm), 4 : 3 aspect ratio LCD panel Screen Size 16.06 "...

  • Page 2: Table Of Contents

    6 Disassembly and Assembly Instructions 10.7. R, TA, and V-Board Diagram 6.1. Removing the photo stand (TC-20LE5 only) 11 Printed Circuit Views 6.2. Removing the pedestal assembly (TC-20LA5 only) 11.1. A-Board 6.3. Removing the rear cover 11.2. R, V and TA-Board 6.4.

  • Page 3: Safety Precautions

    TC-20LA5 / TC-20LE5 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-20LA5 / TC-20LE5 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: Location Of Controls And Components

    TC-20LA5 / TC-20LE5 3 Location of Controls and Components Board Name Function A-Board Main (AV Switch, Audio, MCU, Grobal Core, AV connector ) R-Board Remote Reciever V-Board Headphone, Speaker, LED TA-Board Tuner, MTS Power Unit Power (AC/DC), Switch None serviceable.

  • Page 6: Service Mode

    TC-20LA5 / TC-20LE5 4 Service Mode 4.1. 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). 4.1.1. Adjustment method..Use the remote control.

  • Page 7: Troubleshooting Guide

    TC-20LA5 / TC-20LE5 5 Troubleshooting Guide 5.1. 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 8: Disassembly And Assembly Instructions

    TC-20LA5 / TC-20LE5 6 Disassembly and Assembly Instructions 6.1. Removing the photo stand 6.3. Removing the rear cover (TC-20LE5 only) 1. Remove the 2 screws. 2. Remove the 8 screws. 1. Lay down the unit so that the rear cover faces upward.

  • Page 9: Removing The Chassis Assembly

    TC-20LA5 / TC-20LE5 6.6. Removing the A-Board, TA- 6.5. Removing the chassis Board, and Power unit assembly 1. Remove the 12 screws. 1. Remove the 3 screws. 2. Remove the A-Board, TA-Board, and Power unit. 2. Disconnect Inverter couplers and Panel coupler and clam A11-Panel coupler wire.

  • Page 10: Removing The Lcd Panel, R-Board, And V-Board

    TC-20LA5 / TC-20LE5 6.8. Removing the LCD panel, R- Board, and V-Board 1. Remove the 4 screws. 2. Remove the LCD Panel. 3. Remove the 2screw. 4. Remove the R-Board and V-Board. 6.9. Removing the LCD mount metal 1. Remove the 4 screws.

  • Page 11: Location Of Lead Wiring

    TC-20LA5 / TC-20LE5 6.10. Location of Lead Wiring 1. Put a ferrite core to the A11 coupler wires, then wrap a ferrite core with a felt. (See Fig. 1) 2. Put a ferrite core to the R1/V1 coupler wires, then wrap a ferrite core with a felt. (See Fig. 1)
  • Page 12 TC-20LA5 / TC-20LE5...

  • Page 13: Measurements And Adjustments

    TC-20LA5 / TC-20LE5 7 Measurements and Adjustments 7.1. Video Signal Level Adjustment Instrument Name Connect to Remarks 1. Remote controller 2. RF signal 3. SG 1. Receive studio color bar by RF signal input. (Viewing mode: standard, LCD AI: OFF, Back Light: +30 ) 2.

  • Page 14: Mts Adjustment

    TC-20LA5 / TC-20LE5 7.3. MTS Adjustment Caution: MTS adjustment shall be after the aging of 30 minutes or longer. 7.3.1. RF Audio Input level Adjustment Instrument name Connection Remarks 1. Filter jig TP3572 - GND 2. RF signal generator RF ANT. INPUT 3.

  • Page 15: Block Diagram

    TC-20LA5 / TC-20LE5 8 Block Diagram COMPONENT VIDEO1 VIDEO2 IC2201 MTS DEMODULATER JK3004 JK3002A JK3001 A BOARD FILTER DEMODU MATRIX +5V(M) TU001 IC1011 TUNER TV-R TV_R SWITCHING TV-L AUDIO TV_L AGC_DET SCL1 S CLOCK1 SDA1 S DATA1 VIDEO IC3001 INPUT SELRCTOR...
  • Page 16 TC-20LA5 / TC-20LE5 R_ch(+) IC2001 JK2101 R(+) A BOARD SP(R+) AUDIO OUT HEADPHONE R2012 R_hp(+) HP(R+) L_hp(+) +11V(S) R2015 +11V(S) L(+) L(+) HP(L+) C2006 L_ch(+) C2010 16V 100u SP(L+) L(-) 16V 100u SP(L-) SPEAKER(L) R(+) SP(R-) SP_L+ Q2009 SP_L- STBY+3.3V...

  • Page 17: Wiring Connection Diagram

    TC-20LA5 / TC-20LE5 9 Wiring Connection Diagram REAR INPUT TERMINAL JK3002A JK3001 JK3004 R BOARD VIDEO1 REMOTE AFT_OUT VIDEO2 STBY3.3V COMPONENT TV-L TA BOARD TV-R SCL1 STBY3.3V SDA1 LED_R V BOARD LED_G TV_V SP(R-) SPEAKER(L) SP(L-) SP(L+) SP_L+ HP(L+) SP_L-...
  • Page 18 TC-20LA5 / TC-20LE5...

  • Page 19: Schematic Diagrams

    TC-20LA5 / TC-20LE5 10 Schematic Diagrams 10.1. Schematic Diagram Notes...

  • Page 20: A-Board (1 Of 5) Schematic Diagram

    TC-20LA5 / TC-20LE5 10.2. A-Board (1 of 5) Schematic Diagram A-BOARD TNPH0626AC (1/5) C3003 AM_C1 R3007 AM_S2 C3001 *D3014 MAZ81400ML C3004 AM_Y1 6.3V R3008 AV_IN1 *D3015 R3005 MAZ81400ML AM_S1 C3013 D3026 MAZ81400ML L_CHS 0.01u C3005 V-SW AM_V1 *R2301 VIDEO1 L_CH R3009 6.3V...

  • Page 21: A-Board (2 Of 5) Schematic Diagram

    Noise C4149 C4177 C4151 0.1u L4008 0.1u L4011 R4152 0.1u 0.1u G1C100KA0009 G1C100KA0009 C4165 JS4004 JS4019 0.1u MAIN2.5V MAIN3.3V JS4005 C4105 C4109 C4110 JS4007 6.3V 0.01u TC-20LA5/LE5 TC-20LA5/LE5 A-Board (2 of 5) Schematic Diagram A-Board (2 of 5) Schematic Diagram...

  • Page 22: A-Board (3 Of 5) Schematic Diagram

    C4208 C4213 J0JCC0000241 JS4011 0.1u 0.1u 0.1u 0.1u JS4012 L4019 J0JCC0000241 C4229 C4226 6.3V 0.01u C4246 C4247 C4261 6.3V R4238 R4240 0.01u C4228 2.2k 6.3V JS4016 TC-20LA5/LE5 A-Board (3 of 5) Schematic Diagram TC-20LA5/LE5 A-Board (3 of 5) Schematic Diagram...

  • Page 23: A-Board (4 Of 5) Schematic Diagram

    AC_LCD_B1 *R4276 *R4291 AB_LCD_B2 AC_LCD_B2 RX0+ /PDWN AB_LCD_B3 AC_LCD_B3 RX0- CLK_IN AB_LCD_B4 AC_LCD_B4 AB_LCD_B5 AC_LCD_B5 *R4296 AB_LCD_B6 AC_LCD_B6 AB_LCD_B7 AC_LCD_B7 *R4273 EXB38V101JV *IC4018 C0JBCZ000512 LVDS DRIVER TC-20LA5/LE5 A-Board (4 of 5) Schematic Diagram TC-20LA5/LE5 A-Board (4 of 5) Schematic Diagram...

  • Page 24: A-Board (5 Of 5) Schematic Diagram

    OSDB R1082 OSDBM *R1033 470p 560p *R1029 OSDG OSDGM R1085 *IC1008 C1ZBZ0002679 OSDR OSDRM R1083 TEMP SENSOR OSDH OSDHM R1080 OSDYS OSDYSM R1086 OSDYM R1084 OSDYMM TC-20LA5/LE5 A-Board (5 of 5) Schematic Diagram TC-20LA5/LE5 A-Board (5 of 5) Schematic Diagram...

  • Page 25: R, Ta, And V-Board Diagram

    TC-20LA5 / TC-20LE5 10.7. R, TA, and V-Board Diagram SPEAKER(R) SPEAKER(L) HEADPHONE Q1300 Q1301 JK2101 2SA207700L 2SA207700L K2HC103A0014 POWER ON(G) STANDBY(R) R1310 R1308 R004 R016 TUNER 2.2k TU001 IC2201 ENG36A16GF AN5829S-E1V R1305 R1306 1.5k R1309 MTS DEMODULATER C2202 0.1u C2206...
  • Page 26 TC-20LA5 / TC-20LE5...

  • Page 27: Printed Circuit Views

    TC-20LA5 / TC-20LE5 11 Printed Circuit Views 11.1. A-Board A-BOARD (FOIL SIDE) TNPH0626AC R4331 D905 R4275 IC901 C4274 R4334 C1046 Q4038 Q4037 R4296 R1100 R4297 R1120 R4332 L904 R4333 R1096 R1117 R1099 R944 R1088 R9071 R1153 R1157 R907 R1077 C1041...
  • Page 28 TC-20LA5 / TC-20LE5 Parts Location Parts Location A-BOARD (FOIL) A-BOARD (COMPONENT SIDE) TRANSISTOR TRANSISTOR Q4015 Q4016 IC905 Q1006 IC051 Q901 Q4019 IC1002 Q2006 IC052 Q902 Q4020 IC2001 Q2007 IC053 Q903 Q4021 IC2301 Q2009 IC054 Q904 Q4024 Q2010 IC901 Q905 Q4025...
  • Page 29 TC-20LA5 / TC-20LE5 A-BOARD (COMPONENT SIDE) TNPH0626AC JS005 R933 Q4036 Q4035 IC4003 TNPH0626 L4025 R4256 R4258 ORDER R9082 Q4033 Q4034 IC908 C4234 C4235 C4236 C937 C923 R912 R1115 R4330 IC1012 ZA4001 R955 R4301 IC1006 IC1007 C908 Q1017 R941 C1043 L904...

  • Page 30: R, V And Ta-Board

    TC-20LA5 / TC-20LE5 11.2. R, V and TA-Board R-BOARD (FOIL SIDE) R-BOARD (COMPONENT SIDE) TNPA3591 TNPA3591 R1301 RM001 C1301 V-BOARD (FOIL SIDE) V-BOARD (COMPONENT SIDE) TNPA3590 TNPA3590 JS2001 Q1301 TNPA3590 C2107 C1304 R1305 R1310 TNPA3590 D1302 Q1300 ORDER C2106 D2106...

  • Page 31: Exploded View And Replacement Parts List

    TC-20LA5 / TC-20LE5 12 Exploded View and Replacement Parts List 12.1. Exploded View...

  • Page 32: Packing Exploded View

    TC-20LA5 / TC-20LE5 12.2. Packing Exploded View...

  • Page 33: Mechanical Replacement Parts List

    TC-20LA5 / TC-20LE5 12.3. Mechanical Replacement Parts List Ref. Part No. Part Name & Remarks Description EUR7726020R REMOTE CONTROL J0KG00000011 FLAT CORE J0KG00000052 FILTER K2CB2EZ00001 AC POWER CORD L0AA09B00001 SPEAKER L5EDD5L00006 LCD PANEL TBLG3037 SET LUG TC-20LE5 TBLG3067 RUBBER STAND...

  • Page 34: Electrical Parts List

    TC-20LA5 / TC-20LE5 13 Electrical Parts List 13.1. Electrical Parts List Notes...

  • Page 35: Electrical Replacement Parts List

    TC-20LA5 / TC-20LE5 13.2. Electrical Replacement Parts List Ref. Part No. Part Name & Remarks Ref. Part No. Part Name & Remarks Description Description C1039 ECJ1XF1C104Z C 0.1UF, Z, 16V A1,A2 K1KA09A00064 9P CONNECTOR C1040,4 ECJ1VF1A105Z C 1UF, Z, 10V...
  • Page 36 TC-20LA5 / TC-20LE5 Ref. Part No. Part Name & Remarks Ref. Part No. Part Name & Remarks Description Description C3041,4 ECJ1VB1A224K C 0.22UF, Z, 50V C4203 ECJ1VB0J105K C 1UF, K, 16V C4204 ECJ1XC1H471J C 470PF, J, 50V C3043 ECJ2YF1A475Z C 47PF, Z, 10V...
  • Page 37 TC-20LA5 / TC-20LE5 Ref. Part No. Part Name & Remarks Ref. Part No. Part Name & Remarks Description Description IC903 C0CBAYF00004 Q4014- 2SC584500L TRANSISTOR IC904 C0DBEJG00001 Q4019- 2SA207700L TRANSISTOR IC906 C0DBEJG00001 IC908 PQ1CZ21H2ZP Q4024 2SD1030 TRANSISTOR IC1001 MN102H57KLF Q4025 2SC584500L...
  • Page 38 TC-20LA5 / TC-20LE5 Ref. Part No. Part Name & Remarks Ref. Part No. Part Name & Remarks Description Description R1029 ERJ3GEYJ105 M 1MOHM,J,1/16W R2008 ERJ3GEYJ222 M 2.2KOHM,J,1/16W R1030,3 ERJ3GEYJ272 M 2.7KOHM,J,1/16W R2009 ERJ3GEYJ104 M 100KOHM,J,1/16W R2010 ERJ3GEYJ105 M 1MOHM,J,1/16W R1032 ERJ3GEYJ682 M 6.8KOHM,J,1/16W...
  • Page 39 TC-20LA5 / TC-20LE5 Ref. Part No. Part Name & Remarks Ref. Part No. Part Name & Remarks Description Description R3076 ERJ3GEY0R00 M 0 OHM, 1/16W R4220,2 ERJ3GEYJ220 M 22 OHM,J,1/16W R3077 ERJ3EKF7500 M 750 OHM, 1/16W R4222 ERJ3GEYJ820 M 82 OHM,J,1/16W...
  • Page 40 TC-20LA5 / TC-20LE5 Ref. Part No. Part Name & Remarks Description ZA4010 K9ZZ00000424 CONNECTOR...

This manual is also suitable for:

Tc-20le5

Table of Contents