SAFETY CHECK-OUT
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
This appliance is classified asCheck the antenna terminals, metal trim, Ometallized� knobs, screws,
a CLASS 1 LASER product.and all other exposed metal parts for AC leakage. Check leakage as
The CLASS 1 LASER PROD-described below.
UCT MARKING is located on
the rear exterior.LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
The following
return to chassis, must not exceed 0.5 mA (500 microampers). Leak-
caution label is
age current can be measured by any one of three methods.
located inside of
1. A commercial leakage tester, such as the Simpson 229 or RCA
the unit.
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� 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
To Exposed Metal
diation exposure.Parts on Set
Notes on chip component replacement
Y Never reuse a disconnected chip component.
Y Notice that the minus side of a tantalum capacitor may beAC
0.15?Fvoltmeter
damaged by heat.1.5kW
(0.75V)
Flexible Circuit Board Repairing
Y Keep the temperature of soldering iron around 270uC
during repairing.
Y Do not touch the soldering iron on the same conductor of the
Earth Ground
circuit board (within 3 times).
Y Be careful not to apply force on the conductor when solderingFig. A. Using an AC voltmeter to check AC leakage.
or unsoldering.
MODEL IDENTIFICATION
N BACK PANEL N
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.yyyyyyyyy
REPLACE THESE COMPONENTS WITH SONY PARTS
PART NO.
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
PARTS No.MODEL
4-997-419-01US
ATTENTION AU COMPOSANT AYANT RAPPORT
4-997-419-11Canadian
� LA S?CURIT?!!4-997-419-21AEP
LES COMPOSANTS IDENTIFI?S PAR UNE MARQUE ! SUR4-997-419-31Australian
LES DIAGRAMMES SCH?MATIQUES ET LA LISTE DES
PIéCES SONT CRITIQUES POUR LA S?CURIT? DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIéCES SONY DONT LES NUM?ROS
SONT DONN?S DANS CE MANUEL OU DANS LES
SUPPL?MENTS PUBLI?S PAR SONY.
� 2 � |
ACEC
SONY
