Sony PS-LX520 - Cartridge and Safety Checks; Cartridge Specifications and Model Identification; US Model Leakage Test Procedure

PS-LX520
Weight Approx. 5kg (11 Ibs 0 0z), net Cartridge VL-45G
Approx. 6.1 kg (13 Ibs 7 02), in shipping
(supplied only with Canadian and partial US mode!)
carton Type Moving magnet
Frequency Response: 20Hz—20kHz
Channel Separation: 20 dB at 1 kHz
Output Voltage: 3.5 mV at 1 kHz, 5 cm/sec., 45°
Load Impedance: 50 kQ — 100 k2Q
Tracking Force: 1.0 —1.5g (1.259 recommended)
* This new measuring method concerns only the turntable assembly, in- Stylus: Sony ND-145G
cluding the platter. It excludes wow and flutter caused by the tonearm, the Weight: 6g
cartridge, or the record. Measured by obtaining signal from magnetic pick-up
head.
Cartridge XL-250G (supplied only with AEP, E model)
Type: Moving magnet
Frequency Response: 10Hz—20kHz
Channei Separation: 23 dB at 1 kHz
Output Voltage: 5 mV at 1 kHz, 5cm/sec., 45°
Load Impedance: 50 k2 — 100 k2
Tracking Force: 1.0 —1.5g (1.259 recommended)
Stylus: Sony ND-250G
Weight: 6g
PREECE DIME DIMEN IPE IMPEDE DPM DDE PDE DDE PPLE DVLLE DVL IID PVH
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 (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.
ir)
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
0.15uF S 1,5k2. voltmeter
(0.75 V)
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.|
MODEL IDENTIFICATION
— Specification Label —
Ss ONY: MODEL NO. PS-LX520
STEREO TURNTABLE SYSTEM
CMU bh
US, Canadian
AEP
E
AC: 120V ~ 60 Hz 10W
AC: 220 V ~ 50/60 Hz 10W
AC: 110 — 220 V, 220 — 240 V ~ 50/60 Hz 10 W