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TABLE OF CONTENTS
Section Title Page Section Title Page
SELF DIAGNOSIS FUNCTION...................................... 5
[ TV SECTION]
1. GENERAL
1-1. KV-VF21M40/VF21M70........................................ 8
1-2. KV-VF21M77......................................................... 35
2. DISASSEMBLY
2-1. Rear Cover Removal ............................................... 65
2-2. Chassis Assy Removal ............................................ 65
2-3. Service Position (A Board) ..................................... 65
2-4. A Board Removal.................................................... 65
2-5. Harnes Location ...................................................... 66
2-6. Picture Tube Removal............................................. 67
3. SET-UP ADJUSTMENTS
3-1. Beam Landing......................................................... 68
3-2. Convergence............................................................ 69
3-3. Focus Adjustment.................................................... 70
3-4. Screen (G2) Adjustment.......................................... 70
3-5. White Barance Adjustment ..................................... 71
3-6. Picture Distortion Adjustment................................. 71
4. SAFETY RELATED ADJUSTMENT...................... 72
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 AN-
ODE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUP-
PLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR IM-
PROPER OPERATION IS SUSPECTED.
5. CIRCUIT ADJUSTMENTS
5-1. Adjustments with Commander................................ 73
5-2. Adjustment Method................................................. 74
5-3. Service Data ............................................................ 75
5-4. A Board Adjustment................................................ 77
6. DIAGRAMS
6-1. Block Diagrams....................................................... 79
6-2. Circuit Boards Location.......................................... 83
6-3. Printed Wiring Boards and Schematic Diagrams.... 83
• A Board.................................................................... 84
• CV, F Boards............................................................ 91
6. EXPLODED VIEWS
6-1. Picture Tube ............................................................124
6-2. Chassis..................................................................... 125
7. ELECTRICAL PARTS LIST...................................... 129
[ VIDEO SECTION]
1. GENERAL....................................................................... 96
2. DISASSEMBLY............................................................. 97
3. CIRCUIT ADJUSTMENTS ........................................ 98
4. INTERFACE, IC PIN FUNCTION
DESCRIPTION ..............................................................101
5. DIAGRAMS..................................................................... 105
6. EXPLODED VIEWS .....................................................126
7. ELECTRICAL PARTS LIST...................................... 135