Sony DVS-2000C Installation Manual page 2

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
manufacture's 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
0.15µF
1.5kΩ
Earth Ground
Fig. A. Using an AC Voltmeter to check AC leakage.
DVS-2000C Serial No. 10001 and
Higher
BZS-2010
Higher
and Higher
and Higher
10001 and Higher BKDS-2020
No. 10001 and Higher
Serial No. 10001 and Higher
BKDS-2022 Serial No. 10001 and
Higher
AC
10001 and Higher
voltmeter
BKDS-2032 Serial No. 10001 and
(5.25V)
Higher
BKDS-2041 Serial No. 10001 and
Higher
BKDS-2050 Serial No. 10001 and
Higher
BKDS-2060 Serial No. 10001 and
Higher
BKDS-2061 Serial No. 10001 and
Higher
BKDS-2062 Serial No. 10001 and
Higher
BKDS-2070 Serial No. 10001 and
Higher
BKDS-2071 Serial No. 10001 and
Higher
BKDS-2072 Serial No. 10001 and
Higher
Serial No. 10001 and
BZS-2020 Serial No. 10001
BZS-2090 Serial No. 10001
BKDS-2010 Serial No.
BKDS-2021
BKDS-2031 Serial No.
Serial