Read Sony CDX-757MX Service Manual online
5
CDX-757MX
TABLE OF CONTENTS
SERVICING NOTES
..........................................................
2
1.
GENERAL
Installation .......................................................................
6
Connections .....................................................................
7
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
8
2-2. Case (Upper. T), Front Panel Assy .................................
9
2-3. Mechanism Deck (MG-251B-137) .................................
9
2-4. JACK Board .................................................................... 10
2-5. MAIN Board, Slide Variable Resistor
2-5. MAIN Board, Slide Variable Resistor
(Elevator Height Sensor) (RV202) ................................. 10
2-6. ELJ Motor Assy (Elevator) (M104) ................................ 11
2-7. Escutcheon (T) ................................................................ 11
2-8. Chassis (U.S) Sub Assy .................................................. 12
2-9. Chassis Assy .................................................................... 12
2-10. RF Board ......................................................................... 13
2-11. Sled Motor Assy (251) (M101),
2-7. Escutcheon (T) ................................................................ 11
2-8. Chassis (U.S) Sub Assy .................................................. 12
2-9. Chassis Assy .................................................................... 12
2-10. RF Board ......................................................................... 13
2-11. Sled Motor Assy (251) (M101),
Optical Pick-up (KSS-720A) .......................................... 13
2-12. LSW Board, Spindle Motor (S) Sub Assy (M102) ........ 14
2-13. ELJ Motor Assy (Chucking) (M103) ............................. 14
2-13. ELJ Motor Assy (Chucking) (M103) ............................. 14
3.
ASSEMBLY
3-1. Assembly Flow ................................................................ 15
3-2. Optical Pick-up Complete Assy ...................................... 15
3-3. Gear (Lomini)/(Load 1) Assy ......................................... 16
3-4. Operation Check ............................................................. 16
3-2. Optical Pick-up Complete Assy ...................................... 15
3-3. Gear (Lomini)/(Load 1) Assy ......................................... 16
3-4. Operation Check ............................................................. 16
4.
MECHANICAL ADJUSTMENT
.......................... 17
5.
ELECTRICAL CHECK
.......................................... 18
6.
DIAGRAMS
6-1. Block Diagram – SERVO Section – .............................. 20
6-2. Block Diagram – MAIN Section (1/2) – ....................... 21
6-3. Block Diagram – MAIN Section (2/2) – ....................... 22
6-4. Note for Printed Wiring Boards and
6-2. Block Diagram – MAIN Section (1/2) – ....................... 21
6-3. Block Diagram – MAIN Section (2/2) – ....................... 22
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
6-5. Printed Wiring Boards – RF/LSW Boards – ................. 24
6-6. Schematic Diagram – RF/LSW Boards – ...................... 25
6-7. Printed Wiring Boards
6-6. Schematic Diagram – RF/LSW Boards – ...................... 25
6-7. Printed Wiring Boards
– MAIN Board (Component Side) – .............................. 26
6-8. Printed Wiring Boards
– MAIN (Conductor Side)/SWITCH Boards – .............. 27
6-9. Schematic Diagram – MAIN Board (1/3) – .................. 28
6-10. Schematic Diagram
6-10. Schematic Diagram
– MAIN (2/3)/SWITCH Boards – .................................. 29
6-11. Schematic Diagram – MAIN Board (3/3) – .................. 30
6-12. Printed Wiring Boards – JACK Board – ........................ 32
6-13. Schematic Diagram – JACK Board – ............................. 33
6-14. IC Pin Function Description ........................................... 39
6-12. Printed Wiring Boards – JACK Board – ........................ 32
6-13. Schematic Diagram – JACK Board – ............................. 33
6-14. IC Pin Function Description ........................................... 39
7.
EXPLODED VIEWS
7-1. Case Section .................................................................... 41
7-2. Mechanism Deck Section-1 (MG-251B-137) ................ 42
7-3. Mechanism Deck Section-2 (MG-251B-137) ................ 43
7-4. Mechanism Deck Section-3 (MG-251B-137) ................ 44
7-5. Mechanism Deck Section-4 (MG-251B-137) ................ 45
7-2. Mechanism Deck Section-1 (MG-251B-137) ................ 42
7-3. Mechanism Deck Section-2 (MG-251B-137) ................ 43
7-4. Mechanism Deck Section-3 (MG-251B-137) ................ 44
7-5. Mechanism Deck Section-4 (MG-251B-137) ................ 45
8.
ELECTRICAL PARTS LIST
............................... 46
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