Leakage Test; Model Identification - Sony ICF-C730 Service Manual

ICF-C730
SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:
Check the antenna terminals, 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 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
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 2 V AC range are
suitable. (See Fig. A)
To Exposed Metal
Parts on Set
1,
A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers' instructions to use these instru-
ments.
A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
' this job.
AC
voltmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
PLP PPP PPP PPD PPP PDB PEP P BD DPD BBB DBD BPD DDO DBD DODD EDO DD ODP PDP ODP ODP ODO DODD ODD
MODEL IDENTIFICATION
— Model Number Label —
Carved on lower cabinet: US, CND, AEP, E, IT, PA model (MADE IN TAIWAN)
US, CND, AEP, IT model (MADE IN JAPAN)
and AUS model (MADE IN TAIWAN)
Model number label:
SONY,
FM/AM 2BANDS
mooet. NO. [CF-C730
SAFETY-RELATED COMPONENT WARNING!!
MADE IN JAPAN:
MADE IN TAIWAN:
US, CND, AEP, E, IT, AUS, PA model!
CND model: Canadian model
IT model: Italian model
AUS model: Australian model
PA model: Panama model
US, CND, PA model: AC: 120V 60Hz 5W
AEP, E, IT model:
AUS model:
AC: 220V~50Hz 5W
AC: 240V~50Hz 5W
US, CND, AEP, IT model
3-903-114-01: US, CND model (MADE IN JAPAN)
3-903-115-01: AEP, IT model (MADE IN JAPAN)
3-902-766-01: AUS model (MADE IN TAIWAN)
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