Sony TC-K333ESG - Safety Checks and Testing Procedures; Model Power Requirements; AC Leakage Testing

| TC-K333ESG/K950ES
MODEL IDENTIFICATION SAFETY CHECK-OUT
— Specification Label —
After correcting the original service problem,
perform the following safety check before releasing
TC- K333ESG the set to the customer:
TC- K950ES Check the antenna terminals, metal trim, ‘‘metallized”
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
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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 0.5mA (500 microampers). Leakage
current can be measured by any one of three
SERIAL NO. methods: |
MADE IN JAPAN 1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers’ instructions to use these instru-
US, Canadian Models: AC: 120V 60Hz 31W ments.
AEP, West Germany
Model: AC: 220V \50/60Hz 31W
nw
A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
UK Model: AC: 240V “U50/60Hz 31W this job.
E
Model:
AC:
120,
220,
240V
;
:
T\)50/60Hz 31W . 3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75 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 2V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
AC
voltmeter
| | «(0.78 V)
= Earth Ground
Using an AC voltmeter to check AC leakage.