Sony CDP-CE545 - Compact Disc Player, Service Manual

2

SAFETY  CHECK-OUT

After correcting the original service problem, perform the follow-
ing 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 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. 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-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)

Fig. A.

Using an AC voltmeter to check AC leakage.

1.5 k

Ω

0.15 

µ

F

AC
voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

TABLE  OF  CONTENTS

1.

SERVICEING  NOTES

............................................

3

2.

GENERAL

...................................................................

6

3.

DISASSEMBLY

.........................................................

7

4.

TEST  MODE

.............................................................. 12

5.

ELECTRICAL  CHECKING

.................................. 16

6.

DIAGRAMS

6-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 19

6-2. Printed Wiring Board  – BD Board – ............................. 20
6-3. Schematic Diagram  – BD Board – ................................ 21
6-4. Printed Wiring Boards  – JUNCTION/SENSOR/

LOADING MOTOR Boards – ........................................ 22

6-5. Schematic Diagram  – JUNCTION/SENSOR/

LOADING MOTOR Boards – ........................................ 23

6-6. Printed Wiring Board  – MAIN Board – ........................ 24
6-7. Schematic Diagram  – MAIN Board – ........................... 25
6-8. Printed Wiring Boards  – PANEL Section – .................. 26
6-9. Schematic Diagram  – PANEL Section – ....................... 27
6-10. IC Pin Function Description ........................................... 32

7.

EXPLODED  VIEWS

................................................ 36

8.

ELECTRICAL  PARTS  LIST

............................... 42

ATTENTION  AU  COMPOSANT  AYANT  RAPPORT

À  LA  SÉCURITÉ!

LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  

0

SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.

SAFETY-RELATED  COMPONENT  WARNING!!

COMPONENTS  IDENTIFIED  BY  MARK  

0

  OR  DOTTED

LINE  WITH  MARK  

0

  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  SONY.