SAFETY-RELATED COMPONENT WARNING!!MODEL IDENTIFICATION
� Back Panel �
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMSPower Voltage Indication
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 !
SUR LES DIAGRAMMES SCH?MATIQUES ET LA LISTE
DES PIéCES SONT CRITIQUES POUR LA S?CURIT?
DE FONCTIONNEMENT. NE REMPLACER CES COM-VOLTAGE SELECTOR
POSANTS QUE PAR DES PIéCES SONY DONT LESSwitch
NUM?ROS SONT DONN?S DANS CE MANUEL OU
DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
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, Ometallized� knobs,Power Voltage
screws, and all other exposed metal parts for AC leakage.ModelIncdication
Check leakage as described below.
US, Canadian modelsAC: 120 V 60 Hz 55 W
AEP, UK modelsAC: 230 �50 Hz 55 V W
LEAKAGE TEST
The AC leakage from any exposed metal part to earth gMalarysia,ound and Singapore,
AC: 110 � 120/
from all exposed metal parts to any exposed metal part having aHong Kong and
220 � 240 �V 50/60 Hz 55 W
return to chassis, must not exceed 0.5 mA (500 microampers.).Thai models
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 manufacturersO 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 Olimit� 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)
To Exposed Metal
Parts on Set
AC
0.15 ?F1.5 kWvoltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
� 4 � |
ACEC
