Sony DMW-IF02, Руководство по обслуживанию

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DMW-S01NL/S02NL/ST001
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information that is the property of Sony Corporation.
Sony Corporation expressly prohibits the duplication of
any portion of this manual or the use thereof for any
purpose other than the operation or maintenance of the
equipment described in this manual without the express
written permission of Sony Corporation.
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The material contained in this manual consists of
information that is property of Sony Corporation and is
intend solely for use by the purchasers of the equipment
described in this manual. Without limitation to the
foregoing sentence, the material contained in Chapter 1,
Section 1-6-2 “DMW-ST001” and Section 1-7-2 “DMW-
ST001” and Chapter 3, “DMW-ST001 Service Information”
also consists of copyrighted information that is property of
EMC Corporation, reproduced by Sony Corporation under
a license of EMC Corporation, and is intended solely for
use by the purchasers of the equipment described in the
manual.
Sony Corporation expressly prohibits the duplication of any
portion of this manual or the use thereof for any purpose
other than the operation or maintenance of the equipment
described in this manual without the express written
permission of Sony Corporation.
Datalight is a registered trademark of Datalight, Inc.
ROM-DOS is a trademark of Datalight, Inc.
Copyright 1989-2000 Datalight, Inc., All Rights Reserved.
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety checks before
releasing the set to the customer :
Check the metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC
leakage. Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to
any exposed metal part having a return to
chassis, must not exceed 3.5 mA. 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
manufacturers’ 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 “limit” indication is 5.25 V, so
analog meters must have an accurate low-
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
Fig A. Using an AC voltmeter to check AC leakage.
AC
voltmeter
(5.25V)
Earth Ground
0.15
µ
F 1.5 k
Z
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