Table Of Contents; Servicing Notes - Sony cfd-s27 Service Manual

Table of Contents

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CAUTION
Use of controls or adjustments or performance
of procedures other than those specified herein
may result in hazardous radiation exposure.
Laser component in this product is capable of emitting
radiation exceeding the limit for Class 1.
Notice for customers in the United Kingdom
A moulded plug complying with BS 1363 is fitted to this
equipment for your safety and convenience.
Should the fuse in the plug supplied need to be replaced, same
rating fuse approved by ASTA or BS1 to BS 1362, (i.e. marked
with 2 or a @ mark) must be used.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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.
NOTES ON LASER DIODE EMISSION CHECK
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
This Compact Disc player is
classified as a CLASS 1
LASER product.
The CLASS 1 LASER
PRODUCT label is located
on the bottom exterior.
SECTION 1

SERVICING NOTES

TABLE OF CONTENTS

Specifications ........................................................................... 1
Location of Controls .......................................................... 4
Power Board .............................................................. 5
3-3. Cabinet (Upper) .......................................................... 6
4-1. Mechanical Adjustments ............................................ 7
4-2. Electrical Adjustments ................................................ 7
5-1. Explanation of IC Terminals ..................................... 13
5-2. Block Diagram .......................................................... 15
5-3. Printed Wiring Boards (Former Type) ...................... 19
(Former Type) .......................................................... 23
(Former Type) .......................................................... 28
5-6. Printed Wiring Boards (New Type) .......................... 35
(New Type) ............................................................... 39
(New Type) ............................................................... 44
6-1. Front Cabinet Section ............................................... 47
6-2. Upper Cabinet Section .............................................. 48
6-3. Rear Cabinet Section ................................................ 49
pick-up block. Therefore, when checking the laser diode
emission, observe more than 30 cm away from the objective
lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
Code number of Chuck Plate Jig : X-4918-255-1
r
- 2 -
.................................................... 2
.................................... 53

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