Read Sony KV-SZ25M31 Service Manual online
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KV-SZ25M31/M90/M91
RM-GA002
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION ........................................... 3
1. DISASSEMBLY
1-1.
Rear Cover Removal .................................................. 5
1-2.
Speaker Removal ....................................................... 5
1-3.
Chassis Assy Removal ............................................... 5
1-4.
Service Position ......................................................... 5
1-5.
PF (KV-SZ25M91) and A Boards Removal .............. 5
1-6.
H1 Board Removal .................................................... 5
1-7.
Picture Tube Removal ................................................ 6
2. SET-UP ADJUSTMENTS
2-1.
Beam Landing Adjustment ........................................ 7
2-2.
Convergence Adjustment ........................................... 8
2-3.
Focus Adjustment .................................................... 10
2-4.
G2 (SCREEN) Adjustments .................................... 10
2-5.
Sub Bright Adjustment ............................................ 10
2-6.
White Balance Adjustment ...................................... 10
3. CIRCUIT ADJUSTMENTS
3-1.
Adjustment With Commander .................................. 11
3-2.
Adjustment Method .................................................. 12
3-3.
Picture Quality Adjustment ...................................... 29
3-3-1. P Max/Contrast Adjustment .......................... 29
3-3-2. Sub Color Adjustment ................................... 29
3-3-3. Sub Hue Adjustment ...................................... 29
3-3-1. P Max/Contrast Adjustment .......................... 29
3-3-2. Sub Color Adjustment ................................... 29
3-3-3. Sub Hue Adjustment ...................................... 29
3-4.
Geometry Adjustment ............................................. 30
3-4-1. H-Trapezoid Adjustment ............................... 30
3-4-2. Normal Mode 50Hz/60Hz ............................. 30
3-4-3. Wide Mode 50Hz/60Hz
(V Compression Adjustment) ................................... 30
3-4-1. H-Trapezoid Adjustment ............................... 30
3-4-2. Normal Mode 50Hz/60Hz ............................. 30
3-4-3. Wide Mode 50Hz/60Hz
(V Compression Adjustment) ................................... 30
Section
Title
Page
Section
Title
Page
4. DIAGRAMS
4-1.
Block Diagram ......................................................... 31
4-2.
Circuit Boards Location .......................................... 32
4-3.
Schematic Diagram Information ............................. 32
4-3-1. A Board — (Block 001) ............................... 33
4-3-2. A Board — (Block 002) ............................... 35
4-3-3. A Board — (Block 003) .............................. 37
4-3-4. A Board — (Block 004) ............................... 39
4-3-5. A Board — (Block 005) ............................... 41
4-3-6. A Board — (Block 006) ............................... 43
4-3-7. A Board — (Block 007) ............................... 45
4-3-8. CV Board Schematic Diagram ..................... 46
4-3-9. H1 Board Schematic Diagram ...................... 47
4-3-10. PF Board Schematic Diagram .................... 48
4-3-1. A Board — (Block 001) ............................... 33
4-3-2. A Board — (Block 002) ............................... 35
4-3-3. A Board — (Block 003) .............................. 37
4-3-4. A Board — (Block 004) ............................... 39
4-3-5. A Board — (Block 005) ............................... 41
4-3-6. A Board — (Block 006) ............................... 43
4-3-7. A Board — (Block 007) ............................... 45
4-3-8. CV Board Schematic Diagram ..................... 46
4-3-9. H1 Board Schematic Diagram ...................... 47
4-3-10. PF Board Schematic Diagram .................... 48
4-4.
Voltage Measurement and Waveform ...................... 49
4-5.
Printed Wiring Boards ............................................. 52
4-6.
Semiconductors ........................................................ 56
5. EXPLODED VIEWS
5-1.
Chassis ..................................................................... 58
6. ELECTRICAL PARTS LIST .......................................... 60
OPERATING INSTRUCTIONS
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
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