
– 3 –
KV-XA21M80/XA21M83/XA21M50/
KV-XA21M61/XA21M60
RM-952
TABLE OF CONTENTS
Section Title Page
SELF DIAGNOSIS FUNCTION ................................ 4
1. GENERAL ........................................................................ 7
2. DISASSEMBLY
2-1. Rear Cover Removal ................................................ 25
2-2. Speaker Removal ..................................................... 25
2-3. Chassis Assy Removal ............................................. 25
2-4. F Bracke Removal .................................................. 25
2-5. J2 Board and Terminal Bracke Removal................ 25
2-6. Service Posi ion ....................................................... 25
2-7. Replacemen of Par s ............................................... 26
2-7-1 Replacemen of Ligh Guide .............................................. 26
2-7-2 Replacemen of Power Bu on ........................................... 26
2-8. Pic ure Tube Removal .............................................. 26
2-9. Removal of Anode Cap ............................................ 27
3. SET-UP ADJUSTMENTS
3-1. Beam Landing .......................................................... 28
3-2. Convergence Adjus men ......................................... 29
3-3. Focus Adjus men .................................................... 31
3-4. G2 (Screen) and Whi e Balance Adjus men s ......... 31
4. CIRCUIT ADJUSTMENTS
4-1. Adjus men s wi h Commander ................................ 32
4-2. Adjus men Me hod ................................................. 32
4-3. Pic ure Quali y Adjus men s .................................... 37
4-4. Deflec ion Adjus men ............................................. 37
4-5. A Board Adjus men Af er IC003
(memory) Replacemen ........................................... 37
4-6. Pic ure Dis or ion Adjus men ................................. 38
Section Title Page
5. DIAGRAMS
5-1. Block Diagram .......................................................... 39
5-2. Circui Board Loca ion ............................................. 41
5-3. Schema ic Diagrams ................................................. 42
(1) Schema ic Diagrams of F, J2 and C1 Boards ..... 43
(2) Schema ic Diagram of A Board .......................... 45
(3) Schema ic Diagram of V1Board ......................... 61
5-4. Vol age Measuremen s .............................................. 65
5-5. Waveforms ................................................................ 68
5-6. Prin ed Wiring Boards and Par s Loca ion ............... 69
5-7. Semiconduc ors ......................................................... 73
6. EXPLODED VIEWS
6-1. Pic ure Tube .............................................................. 75
6-2. Chassis ...................................................................... 76
7. ELECTRICAL PARTS LIST ...................................... 77