Panasonic TX-22LT3, Service Manual

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1 Safety Precautions 3
1.1. General Guidelines 3
1.2. Touch-Current Check 3
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 4
3 Self Check 5
4 Chasis Board Layout 6
5 Servicing method 7
5.1. Removing the tilt base 7
5.2. Removing the rear cover 7
5.3. Removing the shield plate 7
5.4. Removing the PH shield plate and the PD shield plate 8
5.5. Removing the speaker box 8
5.6. Removing the V-Board 8
5.7. Removing the switch unit 8
5.8. Removing the K-Board 8
5.9. Removing the chassis 9
5.10. Removing the tuner cover and the terminal cover 9
5.11. Removing the B-Board (with tuner assembly) 9
5.12. Removing the A-Board 10
5.13. Removing the IC Heat Shink 10
5.14. Removing the DG-Board 10
5.15. Removing the PH-Board 10
5.16. Removing the PD-Board 11
5.17. Removing the LCD panel 11
6 Service Mode Function 12
6.1. How to enter SERVICE 1 12
6.2. How to enter SERVICE 2 12
6.3. Option Description 14
7 Conductor Views 17
7.1. A-Board 17
7.2. DG-Board 19
7.3. PD-Board 21
7.4. PH-Board 22
7.5. B, H1, H2, K, P1 and P2-Board 23
8 Block and Schematic Diagrams 25
8.1. Schematic Diagram Notes 25
8.2. Power Block Diagram 26
8.3. Signal Block Diagram 28
8.4. A-Board (1 of 3) Schematic Diagram 30
8.5. A-Board (2 of 3), B-Board, K-Board and V-Board
Schematic Diagram 31
8.6. A-Board (3 of 3) Schematic Diagram 32
8.7. DG-Board (1 of 5) Schematic Diagram 33
8.8. DG-Board (2 of 5) Schematic Diagram 34
8.9. DG-Board (3 of 5) Schematic Diagram 35
8.10. DG-Board (4 of 5) Schematic Diagram 36
8.11. DG-Board (5 of 5) Schematic Diagram 37
8.12. PD-Board and PH-Board Schematic Diagram 38
9 Parts Location & Mechanical Replacement Parts List 39
9.1. Parts Location 39
9.2. Packing Exploded View 40
9.3. Mechanical Replacement Parts List 41
10 Replacement Parts List 42
10.1. Replacement Parts List Notes 42
10.2. Electrical Replacement Parts List 43
CONTENTS
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TX-22LT3