Panasonic TX-22LT2 Service Manual
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Panasonic TX-22LT2 Service Manual

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SPECIFICATIONS
Power Source
AC 100~240V, 50/60Hz
Power Consumption
Average use: 69W (Maximum current 0.7A)
Stand-by condition: 4W (at 120-240V)
LCD
22-inch, 16:9 aspect ratio LCD panel
Screen Size
487mm(W) x 274mm(H)
Receiving System
PAL I, PAL-525/60, M. NTSC
NTSC (AV only)
Receiving Channel
UHF E21 - E65
Sound
Speaker
Tweeter (4 x 7cm 2pcs, 8
Audio Output
9W (2.5W+2.5W+4.0W (Woofer)), 10%THD, 50Hz~20kHz
Headphones
M3(3.5 mm) Jack x 1
ORDER NO. ITD0110014C2
TV set
DC 15V, 4.1 A max.
), Woofer (Ø5cm 2pcs, 4
1
22" LCD TV
TX-22LT2
LH4 Chassis
)

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  • Page 1 ORDER NO. ITD0110014C2 22” LCD TV TX-22LT2 LH4 Chassis SPECIFICATIONS Power Source AC 100~240V, 50/60Hz Power Consumption Average use: 69W (Maximum current 0.7A) Stand-by condition: 4W (at 120-240V) TV set DC 15V, 4.1 A max. 22-inch, 16:9 aspect ratio LCD panel...
  • Page 2 FEATURES 3D Y/C Digital comb Filter Aero-Hammer Double Woofer System (2Way 4Speaker System) CLOSED CAPTION V-Chip Accessories Supplied Remote control Transmitter N2QAFC000006 Battery: CR2025 x 1 AC Adaptor: N0JZHK000004 AC Cord: K2CA2EA00005 Operating Conditions Temperature: 41°F-95°F(5-35°C) Humidity: 5%-90% RH (non-condensing) Connection Terminals Video In VIDEO...

  • Page 3: Safety Precautions

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

    repaired and rechecked before it is returned to the customer. Figure 1 2. Prevention of Electro Static 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 transistorsand semiconductor "chip"...

  • Page 5: Self Check

    generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, alminum foil or comparableconductive material).

  • Page 6: Chasis Board Layout

    If the CCU ports have been checked and found to be incorrect or not located then “--” will appear in place of “O.K.”. 4. Chasis Board Layout...

  • Page 7: Servicing Method

    5. Servicing method 5.1. Removing tilt base...
  • Page 8 5.2. Removing rear panel 5.3. Removing speaker unit...

  • Page 9: Removing Chassis

    5.4. Removing chassis...

  • Page 10: Removing A-Board

    5.5. Removing A-Board...
  • Page 12 5.6. Removing B-Board (with tuner assembly) 5.7. Removing DG-Board...
  • Page 13 5.8. Removing H1-Board and H2-Board 5.9. Removing P1-Board 5.10. Removing P2-Board...
  • Page 14 5.11. Removing K-Board 5.12. Removing V-Board 5.13. A-Board servicing...

  • Page 15: Service Mode Function

    6. 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 Mode. 6.1. How to enter SERVICE 1 1. In sound menu, set BASS to MAX/MUM, and set TREBLE to MINIMUM.

  • Page 16: Option Description

    6.3. Option Description...

  • Page 18: Conductor Views

    7. Conductor Views 7.1. A-Board 7.2. B, H1, H2, K, P1 and P2-Board 7.3. DG-Board 8. Block and Schematic Diagrams 8.1. Schematic Diagram Notes...
  • Page 19 8.2. Power Block Diagram 8.3. Signal Block Diagram 8.4. Interconnection Schematic Diagram 8.5. A-Board (1 of 5) Schematic Diagram 8.6. A-Board (2 of 5) Schematic Diagram 8.7. A-Board (3 of 5) Schematic Diagram 8.8. A-Board (4 of 5) Schematic Diagram 8.9.

  • Page 20: Parts Location & Mechanical Replacement Parts List

    8.15. P1-Board Schematic Diagram 8.16. B, K, V, and P2-Board Schematic Diagram 8.17. H1 and H2-Board Schematic Diagram 9. Parts Location & Mechanical Replacement Parts List 9.1. Parts Location 9.2. Packing Exploded View...

  • Page 21: Mechanical Replacement Parts List

    9.3. Mechanical Replacement Parts List Ref. No. Part No. Part Name & Description Remarks EAB719A0 SPEAKER UNIT EDTCF08QAFZ1 LCD PANEL EUR511252 REMOCON TRANSMITTER 1 K1SZBDBA0002 IEC JACK K1TZAFD00002 IF CABLE K2CT3AA00001 AC CORD N0JZHK000004 AC ADAPTOR TBME474 MODEL NAME PLATE TBXA27802 CONTROL BUTTON TBXA29402...
  • Page 22 Ref. No. Part No. Part Name & Description Remarks TKKL5145 TERMINAL COVER(RIGHT) 1 TKKL5147-1 JACK BRACKET TKKL5210 TERMINAL COVER(LEFT) TKPA46006 FRONT PANEL TKPA46201 TOP COVER TKXA10101 CHILD COVER(FRONT) TKXA10202 CHILD COVER(REAR) TKXA10301 PLATE TKXA10401 COVER TKZG5025 CHILD BASE TMKA202 CUSHION TMKA202 CUSHION TMKE161...

  • Page 23: Replacement Parts List Notes

    XTN3+8J SCREW Ref. No. Part No. Part Name & Description Remarks XTN3+8JFY SCREW XTN3+8JFY SCREW XTN3+8JFY SCREW XTS3+10AFY SCREW XTV3+10G SCREW XTW3+6T TAPPING SCREW XTW3+6T TAPPING SCREW XYN4+F12 SCREW XZBT6506 POLY BAG 10. Replacement Parts List 10.1. Replacement Parts List Notes 10.2.
  • Page 24 Ref. No. Part No. Part Name & Description Pcs Remarks K1MN36A00006 36P CONNECTOR K1MN50A00005 50P CONNECTOR K1KA14A00127 14P CONNECTOR K1KA10A00263 10P CONNECTOR TJS5A9180 10P CONNECTOR K1KA10A00215 K1MN06A00002 6P CONNECTOR A7-A9 K4ZZ01000128 TERMINAL TJS1A8120 6P CONNECTOR K1KA06B00049 K1MN05B00031 5P CONNECTOR A12,13 K1KB14A00041 14P CONNECTOR K1KB12A00074...
  • Page 25 Ref. No. Part No. Part Name & Description Pcs Remarks C691 F2A1H100A126 E 10UF, 50V C801 ECJ2XB1H103K C 0.01UF, K, 50V C802 ECA1EHG471 E 470UF, 25V C806 F2A1C6810005 E 680UF, 16V C807 ECJ2VF1H103Z C 0.01UF, Z, 50V C808 ECJ2XB1H222K C 2200PF, K, 50V C810 ECJ2XB1H104K C 0.1UF, K, 50V...
  • Page 26 Ref. No. Part No. Part Name & Description Pcs Remarks C1026 ECJ1VB1C104K C 0.1UF, K, 16V C1028 ECJ1XC1H151J C 150PF, J, 50V C1030-33 ECJ1VF1C104Z C 0.1UF, Z, 16V C1034 ECJ1XC1H220J C 22PF, J, 50V C1035 ECJ1VF1C104Z C 0.1UF, Z, 16V C1036 ECJ1XC1H220J C 22PF, J, 50V...
  • Page 27 Ref. No. Part No. Part Name & Description Pcs Remarks C2548 EEVHB1C100 E 10UF, 16V C2549 EEVHB1C470 E 47UF, 16V C2550 EEVHB1H3R3 E 4.7UF, 25V C2552 ECJ2VB1C104K C 0.1UF, K, 16V C2553 EEVHB1C220 E 22UF, 16V C2554 ECJ2VB1C104K C 0.1UF, K, 16V C2555,56 ECJ2VF1C105Z C 1UF, Z, 16V...
  • Page 28 Ref. No. Part No. Part Name & Description Pcs Remarks C4063 ECJ2VF1C105Z C 1UF, Z, 16V C4200 ECJ2XB1H271K C 270PF, K, 50V ECJ2VB1H271K C4201 ECJ2XB1H561K C 560PF, K, 50V C4202 ECJ2XB1H271K C 270PF, K, 50V ECJ2VB1H271K C4203 ECJ2XB1H561K C 560PF, K, 50V C4204 ECJ2XB1H271K C 270PF, K, 50V...
  • Page 29 Ref. No. Part No. Part Name & Description Pcs Remarks C9001-22 ECJ1VF1C104Z C 0.1UF, Z, 16V C9023 ECJ1XC1H181J C 180PF, J, 50V C9024 ECJ1XC1H150J C 15PF, J, 50V C9028 ECJ1VF1C224Z C 0.22UF, Z, 16V C9029 ECJ1XC1H181J C 180PF, J, 50V C9030 ECJ1XC1H150J C 15PF, J, 50V...
  • Page 30 Ref. No. Part No. Part Name & Description Pcs Remarks C9547 ECJ1VB1C104K C 0.1UF, K, 16V C9548 ECJ1VF1C104Z C 0.1UF, Z, 16V C9549 ECJ1XC1H470J C 47PF, J, 50V C9550 ECJ1XC1H151J C 150PF, J, 50V C9551 ECJ1VC1H270J C 27PF, J, 50V C9552 ECJ1XC1H470J C 47PF, J, 50V...
  • Page 31 Ref. No. Part No. Part Name & Description Pcs Remarks K1MN50A00005 50P CONNECTOR K1MN36A00006 36P CONNECTOR TJSF52250 1P CONNECTOR K1MN50B00005 K1KA11A00048 11P CONNECTOR H1,H2 K1KA14A00128 14P CONNECTOR K1KA12A00188 12P CONNECTOR K1KA11B00039 11P CONNECTOR H5,H6 K1KB20B00031 20P CONNECTOR IC001 C0ZBZ0000443 IC601 NJM2904M LINEAR IC C0ABBA000021...
  • Page 33 Ref. No. Part No. Part Name & Description Pcs Remarks L001 TLPF071 CHOKE COIL G1ZZ00000032 L002 ELJPA330KB CHIP INDUCTOR L004 ELJFA221KB CHIP INDUCTOR L007,08 J0JHC0000001 CHIP INDUCTOR L009,10 ELJPA330KB CHIP INDUCTOR L601-04 G1C680MA0032 INDUCTION COIL L801 TALL08N470KA INDUCTION COIL G0A470GA0011 L802 TAL10RP101LB INDUCTION COIL...
  • Page 34 Ref. No. Part No. Part Name & Description Pcs Remarks LG36-39 TESA169 SHIELD CLIP LG091,92 TJC85341 TERMINAL K4ZZ01000121 LG601-03 TJC85341 TERMINAL K4ZZ01000121 LG606 TJC85341 TERMINAL K4ZZ01000121 LG681,82 TJC85341 TERMINAL K4ZZ01000121 LG801 TJC85341 TERMINAL K4ZZ01000121 LG804-13 TJC85341 TERMINAL K4ZZ01000121 LG1000-03 K4CD01000002 K1KB10A00077 10P CONNECTOR VJS1472...
  • Page 35 Ref. No. Part No. Part Name & Description Pcs Remarks Q2501 UNR521100L Q2502 UN5111 UNR5111 Q2503 UNR521100L Q2510,11 UNR521100L Q2512 2SD601A TRANSISTOR 2SD0601A Q2513 2SB709A TRANSISTOR 2SB0709A Q2514 2SD601A TRANSISTOR 2SD0601A Q2515 2SB709A TRANSISTOR 2SB0709A Q2516 2SD601A TRANSISTOR 2SD0601A Q2517,18 UNR521100L Q2519 UN5111...
  • Page 36 Ref. No. Part No. Part Name & Description Pcs Remarks R612,13 ERJ6ENF2212 M22.1KOHM, 1/10W R614 ERJ6ENF1003 M 100KOHM, 1/10W R615,16 ERJ6GEYJ223 M 22KOHM,J,1/10W R617,18 ERJ6ENF2212 M22.1KOHM, 1/10W R619 ERJ6ENF1003 M 100KOHM, 1/10W R620 ERJ6GEYJ102 M 1KOHM,J,1/10W R621,22 ERJ8GEYJ152 M 1.5KOHM, J,1/8W R623 ERJ6GEYJ102 M 1KOHM,J,1/10W...
  • Page 37 Ref. No. Part No. Part Name & Description Pcs Remarks R812 D0X0R0000010 M 0 OHM,J,1/10W R814-16 ERJ6GEYJ102 M 1KOHM,J,1/10W R818 ERJ6GEYJ103 M 10KOHM,J,1/10W R819 ERJ6GEY0R00 M 0 OHM,J,1/10W R820 ERJ6GEYJ102 M 1KOHM,J,1/10W R821 ERJ6GEYJ153 M 15KOHM,J,1/10W R822,23 ERJ6GEYJ223 M 22KOHM,J,1/10W R824 ERJ6GEYJ562 M 5.6KOHM,J,1/10W...
  • Page 38 Ref. No. Part No. Part Name & Description Pcs Remarks R1009 ERJ3GEYJ103 M 10KOHM,J,1/16W R1010 ERJ3GEY0R00 M 0 OHM, 1/16W R1011 ERJ3GEYJ683 M 68KOHM,J,1/16W R1012 ERJ3GEY0R00 M 0 OHM, 1/16W R1013 ERJ3GEYJ103 M 10KOHM,J,1/16W R1015 ERJ3GEY0R00 M 0 OHM, 1/16W R1016 ERJ3GEYJ101 M 100 OHM,J,1/16W...
  • Page 39 Ref. No. Part No. Part Name & Description Pcs Remarks R1087,88 ERJ3GEYJ473 M 47KOHM,J,1/16W R1089-92 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R1093 ERJ3GEYJ273 M 27KOHM,J,1/16W R1094,95 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R1096 ERJ3GEYJ273 M 27KOHM,J,1/16W R1100 ERJ3GEYJ562 M 5.6KOHM,J,1/16W R1101,02 ERJ3GEYJ183 M 18KOHM,J,1/16W R1103 ERJ3GEYJ101...
  • Page 40 Ref. No. Part No. Part Name & Description Pcs Remarks R3006,07 ERJ3GEYJ103 M 10KOHM,J,1/16W R3008-14 EXB38V473J RESISTOR ARRAY R3015 ERJ3GEYJ473 M 47KOHM,J,1/16W R3016,17 EXB38V473J RESISTOR ARRAY R3019 ERJ3GEYJ102 M 1KOHM,J,1/16W R3020-22 EXB38V473J RESISTOR ARRAY R3024,25 EXB38V473J RESISTOR ARRAY R3027 EXB38V473J RESISTOR ARRAY R3028 ERJ3GEYJ473...
  • Page 41 Ref. No. Part No. Part Name & Description Pcs Remarks R4052,53 ERJ6GEYJ102 M 1KOHM,J,1/10W R4054 ERJ6GEYJ184 M 180KOHM,J,1/10W R4055,56 ERJ6GEYJ393 M 39KOHM,J,1/10W R4057 ERJ6GEYJ274 M 270KOHM,J,1/10W R4058 ERJ6GEYJ184 M 180KOHM,J,1/10W R4059,60 ERJ6GEYJ472 M 4.7KOHM,J,1/10W R4062 ERJ6GEYJ102 M 1KOHM,J,1/10W R4063 ERJ6GEYJ105 M 1MOHM,J,1/10W R4064 ERJ6GEYJ221...
  • Page 42 Ref. No. Part No. Part Name & Description Pcs Remarks R6340 ERJ3GEYJ153 M 15KOHM,J,1/16W R6341 ERJ3GEYJ183 M 18KOHM,J,1/16W R6342 ERJ3GEYJ682 M 6.8KOHM,J,1/16W R6343 ERJ3GEYJ822 M 8.2KOHM,J,1/16W R6344 ERJ3GEYJ391 M 390 OHM,J,1/16W D0GB391JA002 R6345,46 ERJ3GEYJ472 M 4.7KOHM,J,1/16W R6347 EXB38VR000 RESISTOR ARRAY R6348 ERJ3GEYJ472 M 4.7KOHM,J,1/16W...
  • Page 43 Ref. No. Part No. Part Name & Description Pcs Remarks R9542 ERJ6ENF1002 M 10KOHM, 1/10W R9543 ERJ3EKF2002 M 20KOHM, 1/16W R9545 ERJ3GEYJ472 M 4.7KOHM,J,1/16W R9546 ERJ3GEYJ274 M 270KOHM,J,1/16W R9547 ERJ3GEY0R00 M 0 OHM, 1/16W R9548 ERJ3GEYJ393 M 39KOHM,J,1/16W R9550 ERJ3GEYJ393 M 39KOHM,J,1/16W R9551 ERJ3GEYJ563...

  • Page 44: Schematic Diagram For Printing With A4 Size

    Ref. No. Part No. Part Name & Description Pcs Remarks X1001 H0J600400006 CRYSTAL X2501 H0J184500020 CRYSTAL X3001 TSS4008-N CRYSTAL H0J160500020 X3002 TSSA154 CRYSTAL H0J372700001 X9001 H0J202500003 CRYSTAL 11. Schematic Diagram for printing with A4 size...
  • Page 45 H1-BOARD (FOIL SIDE) TNPA2397 H2-BOARD (FOIL SIDE) P2-BOARD (FOIL SIDE) TNPA2398 TNPA2393 K-BOARD (FOIL SIDE) TNPA2396 P1-BOARD (FOIL SIDE) TNPA2392 B-BOARD (FOIL SIDE) TXN/B10GCK V-BOARD (FOIL SIDE) TNPA2395...
  • Page 46 8 Block and Schematic Diagrams 8.1. Schematic Diagram Notes...

  • Page 48: Power Block Diagram

    8.2. Power Block Diagram...

  • Page 52: Signal Block Diagram

    8.3. Signal Block Diagram...

  • Page 56: Interconnection Schematic Diagram

    8.4. Interconnection Schematic Diagram...

  • Page 58: A-Board (1 Of 5) Schematic Diagram

    8.5. A-Board (1 of 5) Schematic Diagram...

  • Page 60: A-Board (2 Of 5) Schematic Diagram

    8.6. A-Board (2 of 5) Schematic Diagram...

  • Page 62: A-Board (3 Of 5) Schematic Diagram

    8.7. A-Board (3 of 5) Schematic Diagram...

  • Page 64: A-Board (4 Of 5) Schematic Diagram

    8.8. A-Board (4 of 5) Schematic Diagram...

  • Page 66: A-Board (5 Of 5) Schematic Diagram

    8.9. A-Board (5 of 5) Schematic Diagram...
  • Page 68 8.10. DG-Board (1 of 5) Schematic Diagram...
  • Page 70 8.11. DG-Board (2 of 5) Schematic Diagram...
  • Page 72 8.12. DG-Board (3 of 5) Schematic Diagram...
  • Page 74 8.13. DG-Board (4 of 5) Schematic Diagram...
  • Page 76 8.14. DG-Board (5 of 5) Schematic Diagram...
  • Page 78 8.15. P1-Board Schematic Diagram...
  • Page 80 8.16. B, K, V, and P2-Board Schematic Diagram...
  • Page 82 8.17. H1 and H2-Board Schematic Diagram...
  • Page 102 A BOARD (COMPONENT SIDE) TNPH0473 Parts Location A BOARD (COMPONENT SIDE) Q810 Q811 IC001 Q812 IC801 Q822 IC802 Q823 IC803 Q824 IC804 Q825 IC806 Q826 IC808 Q2301 IC810 Q2302 IC2301 Q2303 IC2502 Q2504 IC2503 Q2505 IC4001 Q2506 IC4002 Q2510 IC4003 Q2511 TRANSISTOR Q2512...
  • Page 103 A BOARD (FOIL SIDE) TNPH0473 Parts Location A BOARD (FOIL SIDE) Q2513 TP819 Q2514 TP820 IC2301 Q2515 TP844 TRANSISTOR Q2516 TP2323 Q2519 TP2324 Q002 Q4001 TP2331 Q801 TP2332 Q804 TP2333 Q805 TP2334 TP801 Q807 TP2336 TP802 Q809 TP2337 TP803 Q813 TP4016 TP804 Q814...
  • Page 104 DG BOARD (COMPONENT SIDE) TXNDG10GCK Parts Location DG BOARD (COMPONENT SIDE) IC1002 TP6001 IC1005 TP6002 TP6003 IC1006 IC1007 TP6004 IC1008 TP6005 IC3002 TP9503 IC6001 TP9504 TP9505 IC6302 IC6307 IC9001 IC9502 IC9505 TRANSISTOR Q1010 Q6001 Q6002 Q6003 Q9502 Q9503 Q9504...
  • Page 105 DG BOARD (FOIL SIDE) TXNDG10GCK Parts Location DG BOARD (FOIL SIDE) Q907 Q908 IC901 Q909 IC905 Q1001 IC906 Q1002 IC907 Q1003 IC908 Q1004 IC909 Q1005 IC910 Q1006 IC1001 Q1007 IC1003 Q1008 IC1004 Q1009 IC1009 Q1011 IC3001 Q1012 IC3003 Q1013 IC3004 Q6301 IC6002 Q6302...
  • Page 106 H1-BOARD (COMPONENT SIDE) TNPA2397 P2-BOARD (COMPONENT SIDE) H2-BOARD (COMPONENT SIDE) TNPA2393 TNPA2398 K-BOARD (COMPONENT SIDE) TNPA2396 P1-BOARD (COMPONENT SIDE) TNPA2392 B-BOARD (COMPONENT SIDE) TXN/B10GCK V-BOARD (COMPONENT SIDE) TNPA2395...

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