CDP-CX455 - Sony Audio Service Manual (repair manual). Page 3

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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,
observe 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.

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3-1. Case ··············································································· 8
3-2. MAIN Board ································································· 8
3-3. TRANS Board ······························································· 9
3-4. Front Panel Assembly ···················································· 9
3-5. JOG Board, DISP Board, KEYBOARD Board ··········· 10
3-6. Cover (PT), Table (400) Assembly ······························ 11
3-7. LED Board, Guide (Door) ··········································· 11
3-8. DOOR SW Board ························································ 12
3-9. Base (Door Driving) Assembly ··································· 13
3-10. Pop-up Assembly ························································· 13
3-11. D.MOTOR Board, Motor Assembly (Door) (M603) ·· 14
3-12. T.SENS Board, Holder (Table Sensor 400) ················· 14
3-13. D.SENS (OUT) Board, D.SENS (IN) Board ·············· 15
3-14. Back Panel Section ······················································ 15
3-15. CD Mechanism, Magnet Assembly ····························· 16
3-16. LOADING SW Board, LOCK SW Board ·················· 17
3-17. CDM Assembly ··························································· 18
3-18. Motor Assembly (Table) (M601),

Motor Assembly (Loading) (M602) ···························· 18

3-19. BU Holder ··································································· 19
3-20. BD Board, Optical Pick-up (KSM-213BFN) ·············· 19

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6-1. Circuit Boards Location ·············································· 29
6-2. Block Diagrams ··························································· 30
6-3. Printed Wiring Board – BD Board – ··························· 32
6-4. Schematic Diagram – BD Board – ······························ 33
6-5. Printed Wiring Board – MAIN Board – ······················ 34
6-6. Schematic Diagram – MAIN Board (1/2) – ················ 35
6-7. Schematic Diagram – MAIN Board (2/2) – ················ 36
6-8. Printed Wiring Board – Sensor Section – ···················· 37
6-9. Schematic Diagram – Sensor Section – ······················ 37
6-10. Printed Wiring Board – Display Section – ·················· 38
6-11. Schematic Diagram – Display Section – ····················· 39
6-12. Printed Wiring Board – JOG Board – ························· 40
6-13. Schematic Diagram – JOG Board – ···························· 41
6-14. Printed Wiring Board – Power Section – ···················· 42
6-15. Schematic Diagram – Power Section – ······················· 43
6-16. IC Block Diagrams ······················································ 44
6-17. IC Pin Function Descriptions ······································ 46

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7-1. Case Section ································································ 50
7-2. Chassis Section 1 ························································· 51
7-3. Chassis Section 2 ························································· 52
7-4. Front Panel Section ····················································· 53
7-5. Mechanism Section 1 (CDM62-K1BD46A) ··············· 54
7-6. Mechanism Section 2 (CDM62-K1BD46A) ··············· 55
7-7. Mechanism Section 3 (CDM62-K1BD46A) ··············· 56
7-8. Mechanism Section 4 (CDM62-K1BD46A) ··············· 57
7-9. Optical Pick-up Section (BU-K1BD46A) ··················· 58

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