Sony hcd a 195 service manual

Page 2

Compact disc player

Laser Semiconductor laser
Wavelength 780-790nm
Frequency response 2H2 to ZOkHzildB
Signal-to-noise ratio More than 93dB
Dynamic range More than 90dB

Harmonic distortion
Channel separation

Less than 0.01% (1kHz)
More than 90dB (IkHz)

General

Power requirements 120V AC, 60Hz

Power consumption 45W

Mass Approx. 9.9kg (20 lb 14 02)

Dimensions Approx. 355 X 395 X 405mm
(14 X 15W. X 16 inches)

(w/h/d, including projections)

Suppllod accessories

Remote commander RM-SZZI (1)
Batteries Sony SUM-3 (NS) (2)
FM wire antenna [1)
AM loop antenna (1)

Design and specifications are subject to change without notice.

Dolby noise reduction manulactured under license from Dolby Labora-
tories Licensing Corporation.
"DOLBY" and the doubleD symbol DU are trademarks of Dolby Labora-
tories Licensing Corporation.

SAFETY-RELATED COMPONENT WARNING"

COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE WITH
MARK A ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST
ARE CRITICAL T0 SAFE OPERATION. REPLACE THESE COMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN
THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers instructions to use these instru-
ments.

N

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-63'l'rd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have 3 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Part: on Set

A C
/ voltmeter
(0.75 V]

0.!5uF Q15:
L. I

1? Earth Ground

Fry. A. Using an AC voltmeter to check AC leakage.

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