Read Sony KV-21FX250 Service Manual online
KV-21FX250/21FX250A/21FX250C
KV-21FX250/21FX250A/21FX250C
3
TABLE OF CONTENTS
SECTION TITLE
PAGE
Specifi cations ....................................................................................................................................................................................................... 4
Warnings and Cautions ........................................................................................................................................................................................ 5
Safety Check-Out ................................................................................................................................................................................................. 6
Self-Diagnostic Function ...................................................................................................................................................................................... 7
SECTION 1: DISASSEMBLY ............................................................................................................................................................................................. 9
1-1. Rear Cover Removal .................................................................................................................................................................................... 9
1-2. Chassis Assembly Removal ......................................................................................................................................................................... 9
1-3. Service Position .......................................................................................................................................................................................... 10
1-4. Picture Tube Removal .................................................................................................................................................................................11
Anode Cap Removal Procedure ..................................................................................................................................................................11
SECTION 2: SET-UP ADJUSTMENTS ............................................................................................................................................................................ 12
2-1. Beam Landing ............................................................................................................................................................................................ 12
2-2. Convergence .............................................................................................................................................................................................. 13
2-3. Focus .......................................................................................................................................................................................................... 14
2-4. Screen (G2) ................................................................................................................................................................................................ 15
SECTION 3: CIRCUIT ADJUSTMENTS .......................................................................................................................................................................... 16
3-1. Remote Adjustment Buttons and Indicators ............................................................................................................................................... 16
3-2. Accessing the Service Menu Mode ............................................................................................................................................................ 17
3-3. Confi rming Service Adjustment Changes ................................................................................................................................................... 18
3-4. White Balance Adjustments ........................................................................................................................................................................ 18
3-5. Picture Quality Adjustments ....................................................................................................................................................................... 18
3-6. Service Data ............................................................................................................................................................................................... 20
SECTION 4: DIAGRAMS ................................................................................................................................................................................................. 29
4-1. Circuit Boards Location .............................................................................................................................................................................. 29
4-2. Printed Wiring Board and Schematic Diagram Information ........................................................................................................................ 29
4-3. Block Diagram ............................................................................................................................................................................................ 30
Signal Flow Block Diagram ........................................................................................................................................................................ 30
4-4. Schematics and Supporting Information .................................................................................................................................................... 31
A Board Schematic Diagram (1 of 6) ......................................................................................................................................................... 31
A Board Schematic Diagram (2 of 6) ......................................................................................................................................................... 32
A Board Schematic Diagram (3 of 6) ......................................................................................................................................................... 33
A Board Schematic Diagram (4 of 6) ......................................................................................................................................................... 34
A Board Schematic Diagram (5 of 6) ......................................................................................................................................................... 35
A Board Schematic Diagram (6 of 6) ......................................................................................................................................................... 36
CV Board Schematic Diagram ................................................................................................................................................................... 38
H1 Board Schematic Diagram ................................................................................................................................................................... 40
4-5. Semiconductors .......................................................................................................................................................................................... 41
SECTION 5: EXPLODED VIEWS .................................................................................................................................................................................... 42
5-1. Chassis, Picture Tube and Speakers ......................................................................................................................................................... 42
SECTION 6: ELECTRICAL PARTS LIST ........................................................................................................................................................................ 43
Click on the first or last page to see other KV-21FX250 service manuals if exist.