CDP-CX300, CDP-CX335, CDP-CX350, CDP-CX691, SEN-R5900 - Sony Audio Service Manual (repair manual). Page 3

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3-1. Front Panel Assembly ........................................................... 7
3-2. Table (300) Assembly ........................................................... 7
3-3. Base (Door, Gear) Assembly ................................................ 8
3-4. Pop-up Assembly .................................................................. 8
3-5. Mechanism Deck .................................................................. 9
3-6. Base Unit ............................................................................. 9

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5-1. ADJ Mode ......................................................................... 14
5-2. Key and Display Check Mode ............................................ 14

6-1. Mechanical Adjustments ..................................................... 15
6-2. Electrical Adjustment .......................................................... 17

7-1. Circuit Boards Location ...................................................... 20
7-2. Block Diagrams

• BD Section ........................................................................ 21
• Main Section ..................................................................... 23

7-3. Schematic Diagram – BD Section – ................................... 27
7-4. Printed Wiring Board – BD Section – ................................. 29
7-5. Printed Wiring Board – Main Section – .............................. 31
7-6. Schematic Diagram – Main (1/2) Section – ........................ 33
7-7. Schematic Diagram – Main (2/2) Section – ........................ 35
7-8. Printed Wiring Board – T. Sens Section – .......................... 37
7-9. Printed Wiring Board – T. Sens (In) Section – ................... 37
7-10. Printed Wiring Board – D. Sens (Out) Section – .............. 38
7-11. Schematic Diagram – Sensor Section – ............................ 38
7-12. Schematic Diagram – Display Section – ........................... 39
7-13. Printed Wiring Board – Display Section – ........................ 41
7-14. Schematic Diagram – Jog Section – .................................. 43
7-15. Printed Wiring Board – Jog Section – ............................... 44
7-16. Schematic Diagram – Power Section – ............................. 47
7-17. Printed Wiring Board – Power Section – .......................... 48
7-18. Schematic Diagram – Jack Section – ................................ 49
7-19. Printed Wiring Board – Jack Section – ............................. 50
7-20. Schematic Diagram – Sensor/Motor Section – ................. 53
7-21. Printed Wiring Board – Sensor/Motor Section – .............. 54
7-22. IC Block Diagrams ............................................................ 55
7-23. IC Pin Functions ................................................................ 58

8-1. Case Section ........................................................................ 60
8-2. Chassis Section ................................................................... 61
8-3. Front Panel Section ............................................................. 62
8-4. Mechanism Section 1 (CDM54-K1BD35E) ....................... 63
8-5. Mechanism Section 2 (CDM54-K1BD35E) ....................... 64
8-6. Mechanism Section 3 (CDM54-K1BD35E) ....................... 65
8-7. Opeical Pick-up Section (KSM-213BFN/M-NP) ............... 66

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The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repain parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
The emission check enables continuous checking of the S curve.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.