SAFETY CHECK-OUT
CAUTION
After correcting the original service problem, perform the follow-
Use of controls or adjustments or performance of
ing safety check before releasing the set to the customer:
procedures other than those specified herein may
Check the antenna terminals, metal trim, Ometallized� knobs, screws,
result in hazardous radiation exposure.
and all other exposed metal parts for AC leakage.
Check leakage as described below.
Notes on chip component replacement
? Never reuse a disconnected chip component.LEAKAGE TEST
? Notice that the minus side of a tantalum capacitor may be dam-The AC leakage from any exposed metal part to earth ground and
aged by heat.from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers.). Leak-
Flexible Circuit Board Repairingage current can be measured by any one of three methods.
? Keep the temperature of the soldering iron around 270 uC dur1. A commercial leakaginge tester, such as the Simpson 229 or RCA
repairing.WT-540A. Follow the manufacturersO instructions to use these
? Do not touch the soldering iron on the same conductor of theinstruments.
circuit board (within 3 times).2. A battery-operated AC milliammeter. The Data Precision 245
? Be careful not to apply force on the conductor when soldering ordigital multimeter is suitable for this job.
unsoldering.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.
This appliance is classified as a CLASS 1 LASER product.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
The CLASS 1 LASER PRODUCT MARKING is located on
sive VOM that is suitable. Nearly all battery operated digital
the rear exterior.
multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
AC
The following caution label is located inside the unit.
0.15 ?F1.5 kWvoltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
Dolby noise reduction manufactured under license from Dolby
Laboratories Licensing Corporation.
ODOLBY� and the double-D symbol a are trademarks of Dolby
Laboratories Licensing Corporation.
SAFETY-RELATED COMPONENT WARNING!!ATTENTION AU COMPOSANT AYANT RAPPORT
� LA S?CURIT?!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMSLES COMPOSANTS IDENTIFI?S PAR UNE MARQUE !
AND IN THE PARTS LIST ARE CRITICAL TO SAFESUR LES DIAGRAMMES SCH?MATIQUES ET LA LISTE
OPERATION. REPLACE THESE COMPONENTS WITHDES PIéCES SONT CRITIQUES POUR LA S?CURIT?
SONY PARTS WHOSE PART NUMBERS APPEAR ASDE FONCTIONNEMENT. NE REMPLACER CES COM-
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- POSANTS QUE PAR DES PIéCES SONY DONT LES
LISHED BY SONY.NUM?ROS SONT DONN?S DANS CE MANUEL OU
DANS LES SUPPL?MENTS PUBLI?S PAR SONY.
� 3 � |
ACEC
