Sony cfs w 402 service manual

Page 1

(IFS-W402

SERVICE MANUAL

U8 Model
Australian Model

Audio Power Specifications

DISTOHT ION

Model Name Using CFS-W401
Similar Mechanism CFS-W404

Tape Transport DECK A: MF-W404PB-78D
Mechanism Type DECK B: MF-W303RP-75D

SPECIFICATIONS
Battery life
POWER OUTPUT AND TOTAL HAHMONIC am PM "W ~
Sony SUM-1 (NS) Approx. 12 hours
Sony AMi alkaline Approx 18 hours
Vifith az-ohm loads, both channels driven. Dimensions Appmx 566x 143x150 mm (W)

from 150 to 10,000 Hz; rated 1.7 W per
channel minimum RMS power, with no more
than 10% total harmonic distortion in AC

operation.

Other Specifications

Frequency range
Recording system
Frequency response
Speakers

Power output
Output

Power requirements

Power consumption

FM 876-108 MHz

AM 530-1110 kHz

4-track. Zchannel stereo

60-10000 Hz

Full-range: 10 cm (4 inches) dia. x 2
2.3W+23W

(with 10% harmonic distortion; DC operation)
Headphones jack (stereo minijack)

lor 16-68 ohm impedance headphones
120V AC, 60H: (US model)

240V AC. 50H: (Australian model)
9V DC six size D (R20) batteries

14W in AC operation

(223/. x 57/, x 6 inches)
incl. projecting parts and controls. not incl.
handle
Weight Approx, 39 kg (8 lb 10 oz) incl. batteries
Accessory supptied AC power cord (1)

Design and specifications subject to change without notice.

RAD|0 CASSETTE-BORDER
S ONYRJ

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CFS-W402

SERVICING NOTE

0 Repairing printed resistor

Cut both sides of the resistor and solder the carbon resistor
having same value in place of printed one of the conductor
side.

1/ 4W carbon resistor is supplied for the replacing part of the
printed resistor.

0 Note for tape operation buttons
When replacing tape operation buttons, cut them off and
attach new parts with locking compound. (Refer to page 7.)

SAFETY CH ECK-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 05 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-540A. Follow the
manufacturers instructions to use these instru-
ments.

2. A battery-operated AC milliammeter. The Data

Precision 245 digital multimeter is snitable for
this job

3. Measuring the voltage dr0p across a resistor by
means of a VOM or battery-operated AC volt
meter. The limit indication is 0.75V, 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 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts on Se!

015% II -��1,514) / ffifl'fi
;__i

:L Earth Glound

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

SA FETY-RELATED COMPONENT WARNING l!

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

LISHED BY SONY.

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