Sony PS-LX231 - Safety Check-Out Procedures; Leakage Test

PS-LX230/LX230€/LX231
PS-LX231: VL-42G
Type Moving magnet type
Frequency response
20 Hz to 20 kHz
Channel separation
16 dB at 1 kHz
Output voltage 2.5mVat1kHz,5cm/isec.
Load impedance 50to 100 kilohms
Tracking force 2g
Stylus Sony ND-142G
(conical 0.6 mil diamond)
Weight 8g
General
Power requirements
US, Canadian model: 120 Vac, 60Hz
AEP model: 220 Vac, 50/60Hz (240V ac adjustable
by authorized Sony personnel)
UK model: 240V ac, 50/60 Hz (220V ac adjustable
by authorized Sony personnel)
E model: 110—120 or 220—240V ac adjustable,
50/60 Hz
Power consumption
5W
Dimensions Approx. 430 x 110 x 360 mm (w/h/d)
(17 x 43/3 x 14 in.)
including projecting parts and controls
Weight Approx. 3.5 kg (7 Ibs 12 02), net
MODEL IDENTIFICATION
— Specification Label —
PS-LX230
PS-LX231
SONY: MODEL NO.L____|
STEREO TURNTABLE SYSTEM
be cnnennaesingancniiienscaed
SERIAL NO.
MADE IN JAPAN
US, Canadian model: AC: 120V60Hz 5W
AEP model: AC: 220V~50/60Hz 5W
UK model: AC: 240V~50/60Hz 5W
E model: AC: 110—120V, 220—240V~
50/60Hz 5W
SAFETY CHECK-OUT (US Model)
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 (S00 microampers). 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 instru-
ments.
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 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
AC
vo/tmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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