CDP-CE275/CE375
Ver 1.1 2001.07
TABLE OF CONTENTSSAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
1.SERVICING NOTES...............................................ing safety check before releasing the set to the customer:3
Check the antenna terminals, metal trim, Ometallized� knobs,
screws, and all other exposed metal parts for AC leakage.
2.GENERAL...................................................................4
Check leakage as described below.
3.DISASSEMBLY.........................................................5
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
4.TEST MODE..............................................................10
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
5.ELECTRICAL ADJUSTMENTS.........................13
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
6.DIAGRAMSWT-540A. Follow the manufOa instrcturersuctions to use these
6-1. Note for Printed Wiring Boardsinstruments.
and Schematic Diagrams ................................................2. A battery-operated AC milliammeter15. The Data Precision 245
6-2. Printed Wiring Board � BD Board � .............................digital multimeter is suitable for this job.16
6-3. Schematic Diagram � BD Board � ................................3. Measuring the voltage drop across a resistor by means of a17
6-4. Printed Wiring Boards � JUNCTION/SENSOR/VOM or battery-operated AC voltmeterOlimit� indica-. The
LOADING MOTOR Boards �........................................tion is 0.75 V,1 so analog meter8s must have an accurate low-
6-5. Schematic Diagram � JUNCTION/SENSOR/voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
LOADING MOTOR Boards �........................................amples of a passi19ve VOM that is suitable. Nearly all battery
6-6. Printed Wiring Board � MAIN Board � ........................operated digital multimeters that ha20ve a 2 V AC range are suit-
6-7. Schematic Diagram � MAIN Board �...........................able. (See F21ig. A)
6-8. Printed Wiring Boards � PANEL Section � .................. 22
6-9. Schematic Diag� Pram ANEL Section �....................... 23To Exposed Metal
6-10. IC Pin Function Description ...........................................Parts on Set26
7.EXPLODED VIEWS................................................30
8.ELECTRICAL PARTS LIST...............................35
AC
0.15 ?F1.5 k&voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
LES COMPOSANTS IDENTIFI?S PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCH?MATIQUES ET LA LISTE
DES PIéCES SONT CRITIQUES POUR LA S?CURIT?
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIéCES SONY DONT LES
NUM?ROS SONT DONN?S DANS CE MANUEL OU
DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
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ACEC
