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This Sony KLV-26V300A KLV-32V300A KLV-40V300A KLV-46V300A Service Manual and Circuit Diagram
. This service information is designed for experienced repair technicians only and not designed for use by the general public.

TABLE OF CONTENTS

1. DISASSEMBLY

1-1. Rear Cover Removal .................................................... 7
1-2. Vesa Bracket Assembly Removal ................................ 9
1-3. H1 Board Removal .................................................... 11
1-4. U1 Board Removal .................................................... 11
1-5. G1H Board Removal ................................................. 12
1-6. G3 and D1 Boards Removal ...................................... 13
1-7. DTT Shield, UT and BG1 Boards Removal ............. 14
1-8. D2 Board Removal .................................................... 15
1-9. Inlet, AC (with noise filter) Removal ........................ 15
1-10. Speaker, H3 and H4 Boards Removal ....................... 17
1-11. LCD Panel Removal .................................................. 18

2. WIRE DRESSING

2-1. (KLV-26V300A) ...................................................... 20
2-2. (KLV-32V300A) ...................................................... 22
2-3. (KLV-40V300A) ...................................................... 25
2-4. (KLV-46V300A) ...................................................... 29

3. SERVICE ADJUSTMENTS

3-1. How to enter Service Mode ....................................... 34
3-2. Signal Level Adjustment ........................................... 34
3-3. Gamma Adjustment ................................................... 36
3-4. White Balance Adjustment ........................................ 37
3-5. Panel Replacement ..................................................... 38
3-6. Board Replacement .................................................... 38

4. DIAGRAMS

4-1. Block Diagram ........................................................... 39
4-1-1. BG1 (1/3) Block Diagram .............................. 39
4-1-2. BG1 (2/3), H1, H3, H4 and UT Diagrams ..... 40
4-1-3. BG1 (3/3) and U1 Diagrams ........................... 42
4-2. Circuit Boards Location ............................................ 44
4-3. Schematic Diagram Information ............................... 44
4-3-1. BG1 Board — (001) ....................................... 45
4-3-2. BG1 Board — (002) ....................................... 46
4-3-3. BG1 Board — (003) ....................................... 48
4-3-4. BG1 Board — (004) ....................................... 50
4-3-5. BG1 Board — (005) ....................................... 52
4-3-6. BG1 Board — (006) ....................................... 54
4-3-7. BG1 Board — (007) ....................................... 56
4-3-8. BG1 Board — (008) ....................................... 58
4-3-9. BG1 Board — (009) ....................................... 60
4-3-10. G1H, G3, D1 & D2 Boards Schematic Diagram .................................................... 62
4-3-11. H1 Board Schematic Diagram ...................... 63
4-3-12. H3 Board Schematic Diagram ...................... 64
4-3-13. H4 Board Schematic Diagram ...................... 66
4-3-14. U1 Board Schematic Diagram ...................... 67
4-3-15. UT Board Schematic Diagram ..................... 69
4-4. Voltage Measurement and Waveforms ...................... 71
4-5. Printed Wiring Boards ............................................... 73
4-6. Semiconductors .......................................................... 81

5. EXPLODED VIEWS

5-1. Rear Cabinet and Stand Assy .................................... 83
5-2. Frame and Cover ........................................................ 85
5-3. Chassis-1 .................................................................... 87
5-4. Chassis-2 .................................................................... 88
5-5. H3, H4 Boards and Speaker ...................................... 90
5-6. Bezel Assy and LCD Panel ........................................ 91
5-7. Accessories and Packing Materials ........................... 92

6. ELECTRICAL PARTS LIST .............................................. 95

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