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KCY-707
TABLE
OF CONTENS
Specification
1
Caution on replacement of optical pickup
2
Protenction of eyes from laser beam during servicing
3
Laser warning labels
3
Adjustment procedures
4
Microprocessor terminal description
6
IC block diagrams
7
Chassis-exploded view
13
Parts list (chassis)
14
Cassette tape dack mechanism-exploded view
15
Parts list (deck mechanism)
17
CD mechanism-exploded view
18
Parts list (CD mechanism)
19
Printed circuit board parts list
20
Block diagram
21
Printed circuit board view from bottom side
23
Schematic diagram
27
CAUTION
ON REPLACEMENT
OF OPTIONAL
PICKUP
The laser diode in the optical pickup block is so
During repair,carefulley take the following precautions.
sensitive to static électricity,surge current and etc,
(The following precautions are included in the service
that the components are liable to be broken down
parts.)
or its reliability remarkably deteriorated.
PRECAUTIONS
1.Ground for the work-desk.
3.Grounding for the human body.
Place a conductive sheet such as a sheet of copper
Be sure to put on a wrist-strap for grounding whose
(with inpedance lower than 10M.) on the work-
other end is grounded.
desk and place the set on the conductive sheet so
Be particularly careful when the workers wear
that the chassis.
synthetic fiber clothes, or air is dry.
2.Grounding for the test equipment and tools.
4 Select a soldering iron that permits no leakage and
Test equipments and toolings should be grounded
have the tip of the iron well-grounded.
in order that their ground level is the same the
5.Do not check the laser diode terminals with the
ground of the power source.
probe of a circuit tester or oscilloscope.
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