! WARNING
SAFETY CHECK-OUT
This manual is intended for qualified service personnel
only.
After correcting the original service problem, perform
the following safety checks before releasing the set toTo reduce the risk of electric shock, fire or injury, do not
the customer :perform any servicing other than that contained in the
operating instructions unless you are qualified to do so.
Check the metal trim, Ometallized� knobs, screws,
Refer all servicing to qualified service personnel.
and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The material contained in this manual consists of
The AC leakage from any exposed metal part to earth
information that is the property of Sony Corporation and
ground and from all exposed metal parts to any
is intended solely for use by the purchasers of the
exposed metal part having a return to chassis, must
equipment described in this manual.
not exceed 0.5 mA. Leakage current can be measured
Sony Corporation expressly prohibits the duplication of
by any one of three methods.
any portion of this manual or the use thereof for any
purpose other than the operation or maintenance of the
1. A commercial leakage tester, such as the Simpson
equipment described in this manual without the express
229 or RCA WT-540A. Follow the
written permission of Sony Corporation.
manufacturersO instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data
Le matŽriel contenu dans ce manuel consiste en
Precision 245 digital multimeter is suitable for
informations qui sont la propriŽtŽ de Sony Corporation et
this job.
sont destinŽes exclusivement ? lOusage des acquŽreurs
3. Measuring the voltage drop across a resistor by
de lOŽquipement dŽcrit dans ce manuel.
means of a VOM or battery-operated AC
Sony Corporation interdit formellement la copie de
voltmeter. The Olimit� indication is 0.75 V, so
quelque partie que ce soit de ce manuel ou son emploi
analog meters must have an accurate low-voltage
pour tout autre but que des opŽrations ou entretiens de
scale. The Simpson 250 and Sanwa SH-63Trd
lOŽquipement ? moins dOune permission Žcrite de Sony
are examples of a passive VOM that is suitable.
Corporation.
Nearly all battery operated digital multimeters
that have a 2 V AC range are suitable.
(See Fig.A)
Das in dieser Anleitung enthaltene Material besteht aus
informationen, die Eigentum der Sony Corporation sind,
To Exposed Metalund ausschlie§lich zum Gebrauch durch den KŠufer der
Parts on Set
in dieser Anleitung beschriebenen Ausrźstung bestimmt
sind.
Die Sony Corporation untersagt ausdrźcklich die
VervielfÅ ltigung jeglicher Teile dieser Anleitung oder den
ACGebrauch derselben fźr irgendeinen anderen Zweck als
0.15 mFvoltmeterdie Bedienung oder Wartung der in dieser Anleitung
(0.75V)
beschriebenen Ausrźstung ohne ausdrźckliche
schriftliche Erlaubnis der Sony Corporation.
Earth Ground
Fig A. Using an AC voltmeter to check AC leakage.
2 |
ACEC
