PMC-222V - Sony Audio Service Manual (repair manual). Page 2

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Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.

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 Code number of Chuck Plate Jig : X-4918-255-1

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc., on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair 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.

1. Turn POWER switch on with no disc inserted and make

Function switch to CD position.

2. Open the lid for CD.
3. Turn on S701 as following figure.
4. Press the ^ button.
5. Confirm the laser diode emission while observing the objecting

lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down three times for the focus
search.

This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.

The following caution label is located inside the unit.

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2-1.

Front Cabinet Assy ··························································· 19

2-2.

CD Block Assy ································································· 19

2-3.

Mechanism Deck Block Assy ··········································· 20

2-4.

Chucking Plate ································································· 20

2-5.

CD Door Assy, CD Board, Optical Pick-up Section ········ 20

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5-1.

Block Diagram – CD, Video CD Section – ······················ 28

5-2.

Block Diagram – Tuner, Tape, Amp Section – ················· 31

5-3.

Circuit Boards Location ··················································· 33

5-4.

Printed Wiring Board – CD, System Control Section – ··· 34

5-5.

Schematic Diagram – CD, System Control Section  – ····· 37

5-6.

Schematic Diagram – Tuner, Tape, Amp Section – ·········· 42

5-7.

Printed Wiring Board – Tuner, Tape, Amp Section – ······· 47

5-8.

Printed Wiring Board – Video CD Section – ···················· 54

5-9.

Schematic Diagram – Video CD Section – ······················ 57

5-10. IC Block Diagrams ··························································· 60
5-11. IC Pin Function Description ············································· 63

6-1.

Chassis Section ································································· 68

6-2.

Front Cabinet Section ······················································· 69

6-3.

CD Block Section ····························································· 70

6-4.

Mechanism Deck Section-1 (MF-PMC212) ···················· 71

6-5.

Mechanism Deck Section-2 (MF-PMC212) ···················· 72

6-6.

Optical Pick-up Section (KSM-213CDM/C2NP) ············ 73

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