Sony PS-LX120D Service Manual

PS-LX100/LX285
LX285 Model only
REPEAIRING PRECAUTION
[To supply B+ voltage]
regulated DC
3P
connector
power
supply
d
The
power
of
this
unit
is
fed
from
TA-AX285.
o
Core
Cok
Because of this, connect the regulated power supply
as illustrated right when this unit alone operates.
MODEL IDENTIFICATION
— Specification Label —
SONY. MODEL NO. PS-LX100
STEREO TURNTABLE SYSTEM
LLL
SERIAL NO.
MADE IN TAIWAN
4-896-283-01
PS-LX100 Model only
with white stripe
PS-LX100 Model only:
SAFETY CHECK-OUT (US, Canadian 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 (500 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.
US, Canadian model: AC 120V 60Hz 4W
AEP model: AC 220V 50/60Hz 2W
UK model: AC240V 50/60Hz 2W
E model: AC 110 — 120/220 — 240V 50/60Hz 4W
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
voltmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

Sony PS-LX120D Specifications

General

Brand	Sony
Model	PS-LX120D
Category	Stereo System
Language	English