Sony cdp c 505 service manual

Page 2

cop-c505

Note on e Transit Key

The white transit key on the bottom exterior of the unit
protects the optical system against shock during
transportation. Before operating the CD player, be sure to
remove the key by following the instructions on the label,
and store it in a safe place,

When transporting the unit, replace the key in its original
hole and lock it in place,

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BV MARK A OR DOTTED
LINE W|TH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS W|TH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

ATTENTION AU c0MPosANT AVANT RAPPORT
A LA SECURITEi

LES cowosmrs IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES scnéMATIoues ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACEFI ces coM-
POSANTS oue PAR DES PiEcEs so~v DONT LES
NUMEROS SONT DONNES oANs CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

SAFETY CH EC K-OUT

Alter 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 W'DSAOA. Follow the
manufacturers' instructions to use these instru-

ments.

-» 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 volt-
meter. The limit" indication is 0.75V. 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
multimeter: that have 3 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts on Set

A C
voltmeter
(0. 75 V)

0.1514; r§1.5k11
Li__l

Earth Ground

F igt A. Using an AC voltmeter to check AC leakage