Sony cdp c 301 m service manual

Page 2

CDP-C301M/C305M

TABLE OF CONTENTS

Section M Page
Specifications .................................. 1
Safety Check-out ............................... 2
1 . SERVICING NOTES

Front Panel Assembly Removing ------------ 3

Notes on Hnandling the Optical Pick-up

Block or Base Unit ....................... 3

Notes on Laser Diode Emission Check ------- 3

Laser Diode and Focus Search

Operation Check .................... . . . . . 3

Notes on the Transit Key ------------------ 3

Protection of Eyes from Laser Beam

during Servicing .......................... 4
2_ GENERAL ............................. 5
3. ELECTRICAL ADJUSTMENTS ~~~~~~~~~~ 6
4. DIAGRAMS
4.], Block Diagram ........................... 8
4-2. Printed Wiring Boards ~~~~~~~~~~~~~~~~~~~~ 11
4-3. Schematic Diagram ---------------------- 15
5. EXPLODED VIEWS ------------------- 19
6. ELECTRICAL PARTS LIST ~~~~~~~~~~~~ 23

MODEL IDENTIFICATION
- Specification Labels -

US model:

CDP-CSOI M
GDP-0305M

SONY®

COMPACT DISC PLAYER

WWW/Z

MODEL NO.

SERIAL No.

MADE IN JAPAN
MADE IN FRANCE

AC 120V~60 HZlOW

AEP model: AC 220 V ~50/60 HZ 10 W

UK model:
E model:

AC 240 V ~50/60 HZ
AC 110 - 120, 220 -- 240 V ~50/60 HZ 10 W

SA FETY-R E LATED COMPONENT WARNING! !

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONV.

SAFETY CH ECK-OUT

After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WTA54OA. Follow the
manufacturers instructions to use these instru-
ments.

2 A battery-operated AC milliammcter. The Data
Precision 245 digital multimeter is suitable for
this job.

3. Measuring the voltage drop across a resistor by
means of a VOM or battery»opcraled AC volt-
meter. The limit indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Part: on Set

A C
/ voltmeter
(0. 75 V}

0.15mc Télflktl
L, {

'7 faith Ground

F lg, A. Using an AC voltmeter to check AC leakage

ATTENTION AU\COMPOISANT AVANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES som cmrtoUEs POUR LA sécumré
DE FONCTIONNEMENT. NE REMPLACER css com-
POSANTS OUE PAR DES PIECES SONY DONT LES
NUMénos sour DoNNés DANS CE MANUEL ou
DANs LES SUPPLEMENTS PUBLIES PAR souv.