Read Sony CDX-A251C Service Manual online
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CDX-A251C
TABLE OF CONTENTS
1. GENERAL
Location of controls and basic operations ............................... 5
Connections ............................................................................. 7
Connections ............................................................................. 7
2. DISASSEMBLY
2-1. Sub Panel Assy .................................................................. 10
2-2. CD Mechanism Block ....................................................... 11
2-3. Main Board ....................................................................... 11
2-4. Chassis (T) Sub Assy ........................................................ 12
2-5. Roller Arm Assy ................................................................ 12
2-6. Chassis (OP) Assy ............................................................. 13
2-7. Optical Pick-up ................................................................. 13
2-8. SL Motor Assy (M902) ..................................................... 14
2-9. LE Motor Assy (M903) ..................................................... 14
2-10. Servo Board ....................................................................... 15
2-2. CD Mechanism Block ....................................................... 11
2-3. Main Board ....................................................................... 11
2-4. Chassis (T) Sub Assy ........................................................ 12
2-5. Roller Arm Assy ................................................................ 12
2-6. Chassis (OP) Assy ............................................................. 13
2-7. Optical Pick-up ................................................................. 13
2-8. SL Motor Assy (M902) ..................................................... 14
2-9. LE Motor Assy (M903) ..................................................... 14
2-10. Servo Board ....................................................................... 15
3. DIAGRAMS
3-1. Circuit Boards Location .................................................... 16
3-2. Block Diagram – CD Section – ......................................... 17
3-3. Block Diagram – Main Section – ...................................... 18
3-4. Block Diagram – Display Section – .................................. 19
3-5. Printed Wiring Boards – CD Mechanism Section – ......... 21
3-6. Schematic Diagram – CD Mechanism Section (1/2) – ..... 22
3-7. Schematic Diagram – CD Mechanism Section (2/2) – ..... 23
3-8. Printed Wiring Board – Main Section – ............................ 24
3-9. Schematic Diagram – Main Section (1/4) – ...................... 25
3-10. Schematic Diagram – Main Section (2/4) – ...................... 26
3-11. Schematic Diagram – Main Section (3/4) – ...................... 27
3-12. Schematic Diagram – Main Section (4/4) – ...................... 28
3-13. Printed Wiring Boards – Key Section – ............................ 29
3-14. Schematic Diagram – Key Section – ................................ 30
3-2. Block Diagram – CD Section – ......................................... 17
3-3. Block Diagram – Main Section – ...................................... 18
3-4. Block Diagram – Display Section – .................................. 19
3-5. Printed Wiring Boards – CD Mechanism Section – ......... 21
3-6. Schematic Diagram – CD Mechanism Section (1/2) – ..... 22
3-7. Schematic Diagram – CD Mechanism Section (2/2) – ..... 23
3-8. Printed Wiring Board – Main Section – ............................ 24
3-9. Schematic Diagram – Main Section (1/4) – ...................... 25
3-10. Schematic Diagram – Main Section (2/4) – ...................... 26
3-11. Schematic Diagram – Main Section (3/4) – ...................... 27
3-12. Schematic Diagram – Main Section (4/4) – ...................... 28
3-13. Printed Wiring Boards – Key Section – ............................ 29
3-14. Schematic Diagram – Key Section – ................................ 30
4. EXPLODED VIEWS
4-1. Main Section ..................................................................... 38
4-2. Front Panel Section ........................................................... 39
4-3. CD Mechanism Section (1) ............................................... 40
4-4. CD Mechanism Section (2) ............................................... 41
4-5. CD Mechanism Section (3) ............................................... 42
4-6. CD Mechanism Section (4) ............................................... 43
4-2. Front Panel Section ........................................................... 39
4-3. CD Mechanism Section (1) ............................................... 40
4-4. CD Mechanism Section (2) ............................................... 41
4-5. CD Mechanism Section (3) ............................................... 42
4-6. CD Mechanism Section (4) ............................................... 43
5. ELECTRICAL PARTS LIST
........................................ 44
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