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The material contained in this manual consists of
information that is the property of Sony Corporation and
SAFETY CHECK-OUT
is intended solely for use by the purchasers of the
equipment described in this manual.
After correcting the original service problem,
Sony Corporation expressly prohibits the duplication of
any portion of this manual or the use thereof for anyperform the following safety checks before
purpose other than the operation or maintenance of thereleasing the set to the customer :
equipment described in this manual without the express
written permission of Sony Corporation.Check the metal trim, Ometallized� knobs, screws,
and all other exposed metal parts for AC
leakage. Check leakage as described below.
Le matŽriel contenu dans ce manuel consiste en
LEAKAGE TEST
informations qui sont la propriŽtŽ de Sony Corporation et
sont destinŽes exclusivement ? lOusage des acquŽreurs
de lOŽquipement dŽcrit dans ce manuel.The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to
Sony Corporation interdit formellement la copie de
quelque partie que ce soit de ce manuel ou son emploiany exposed metal part having a return to
chassis, must not exceed 3.5 mA. Leakage
pour tout autre but que des opŽrations ou entretiens de
lOŽquipement ? moins dOune permission Žcrite de Sonycurrent can be measured by any one of three
Corporation.methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
Das in dieser Anleitung enthaltene Material besteht aus
Informationen, die Eigentum der Sony Corporation sind,manufacturersO instructions to use these
und ausschlie§lich zum Gebrauch durch den KŠufer derinstruments.
2. A battery-operated AC milliammeter. The
in dieser Anleitung beschriebenen Ausrźstung bestimmt
sind.Data Precision 245 digital multimeter is
Die Sony Corporation untersagt ausdrźcklich diesuitable for this job.
VervielfÅ ltigung jeglicher TAnleitung oder deneile dieser 3. Measuring the voltage drop across a resistor
Gebrauch derselben fźr irgendeinen anderen Zweck alsby means of a VOM or battery-operated AC
voltmeterThe Olimit� indication is 5.25 V. , so
die Bedienung oder Wartung der in dieser Anleitung
beschriebenen Ausrźstung ohne ausdrźcklicheanalog meters must have an accurate low-
schriftliche Erlaubnis der Sony Corporation.voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM
that is suitable. Nearly all battery operated
digital multimeters that have a 20 V AC range
are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
0.15 ?F1.5 kWvoltmeter
(5.25V)
Earth Ground
Fig A. Using an AC voltmeter to check AC leakage. |
ACEC
