HCD-RXD6AV, MHC-RXD6AV - 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
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.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

CAUTION

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

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

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

The following caution label is located inside the unit.

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3-1.

CD door ·············································································· 6

3-2.

CD Mechanism Deck ························································· 6

3-3.

Front Panel ········································································· 7

3-4.

Main Board ········································································· 7

3-5.

Key Board ··········································································· 8

3-6.

Mech Deck ········································································· 8

3-7.

Front Panel (B) ··································································· 9

3-8.

Front Board, H/P Board ······················································ 9

3-9.

Front AMP Board, AMP Board, Photo Socket Board, Fuse
Board ················································································ 10

3-10. CD Tray ············································································ 10
3-11. CD Decord Board ····························································· 11
3-12. Base Unit ·········································································· 12
3-13. Cassette Lid (A)/(B) ························································· 12

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7-1.

Block Diagrams

Tuner CD Section ························································ 19
Main Section ······························································· 20

7-2.

Circrit Boards Location ···················································· 21

7-3.

Printed Wiring Board    Main Section ······························ 22

7-4.

Schematic Diagram    Tuner Section ································ 23

7-5.

Schematic Diagram    Dolby Section ······························· 24

7-6.

Schematic Diagram    Tape Power Section ······················· 25

7-7.

Printed Wiring Board    Front Section ······························ 26

7-8.

Schematic Diagram    Front Section ································· 27

7-9.

Printed Wiring Board    FLD Section ······························· 28

7-10. Schematic Diagram    FLD Section ·································· 29
7-11. Printed Wiring Board    CD Section ································· 30
7-12. Schematic Diagram    CD Section ···································· 31
7-13. Printed Wiring Board    Center/Rear AMP Section ·········· 32
7-14. Schematic Diagram    Center/Rear AMP Section ············· 33
7-15. Schematic Diagram    Front AMP Section ······················· 34
7-16. Printed Wiring Board    Front AMP Section ···················· 35
7-17. IC Block Diagrams ··························································· 36
7-23. IC PIN Function Description ············································ 40

8-1.

Cabinet Section ································································· 42

8-2.

Front Panel Section-1 ······················································· 43

8-3.

Front Panel Section-2 ······················································· 44

8-4.

CD Mechanism Deck Section-1 ······································· 45

8-5.

CD Mechanism Deck Section-2 ······································· 46

8-6.

Base Unit Section (KSM-213ECM) ································· 47

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