Sony cfs 1020 service manual

Page 1

CFS-IDZU

SERVICE MANUAL

US Model
Canadian Model
E Model
Australian Model

Model Name Using Similar
Mechanism set

Tape Transport Mechanism Type MF-1000-75D

CFS~1000

SPECIFICATIONS

Audio Power Specifications

POWER OUTPUT AND TOTAL HARMONlC
DISTOFlTlON: (US Model)

With 3.2 ohm loads, both channels driven,
from 150-10900 Hz; rated 1.8 watts per
channel minimum RMS power, with no
more than 10% total harmonic distortion in
AC operation.

Tuner frequency range FM 876-108 MHz
AM 530-1710 kHz
Antennas FM: Telescopic
AM: Built-in ferrite Dar
Frequency response so-aooo Hz
Speakers Two way: tweeter 2 cm (8/4 in.) dia.
woofer 10 cm (4 in.) die.
Impedance: 32 ohms
Nominal power handling capacity:
25 W
Maximum power handling capacity:
4 W
Power output Canadian, E Model 2.3W + 23W Iat 10%
harmonic distortion) in DC operation
Inputs One external microphone inputjack
(mrnliack)
sensitivity 0.775 mV tor low impedance
microphone
Outputs headphonesjack (stereo minijack) for 32
ohm impedance headphones
Speaker terminals for supplied 3.2 ohm im-
pedance speaker

Power requirement 120 V AC, 60 Hz
9 V DC. six size D (R20) batteries

Power consumption 14 W in AC operation
Battery 3 Batteries FM recording
Sony SUM-1 approx. 17 hours
(NS)
Sony AM1 approx. 30 hours
alkaline
Dimensions Approx. 584 x 1955 x 165 mm (w/hld)

(23 x 73/. x 6% inches) incl. speakers,
projecting parts and controls, not incL
handle

Weight Approx. 4A kg (9 lb 11 oz) incl. speakers.
batteries

Accessory supplied AC power cord (1)

Design and speiicications subject to change without notice.

RADIO CASSETTE-BORDER
SONY;

Page 2

CFS-1 020

TABLE OF CONTENTS

Section Title Page
Specifications"NH-HHHHH ....... 1
safety Check-Out ................. e » o . . . . 2

SECTION 1. DISASSEMBLY AND SETTING

1-1. Cassette Holder Removal and

Setting .i......i...i ..... . ..... 3
1'2. Tuning Knob Removal and Setting -- 3
1-3. Setting of Pointer --------------- 4

SECTION 2. MECHANICAL ADJUSTMENTS' 5

SAF ETY 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 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,

Section Title Page

SECTION 3. ELECTRICAL ADJUSTMENTS

3-1. Tape Recorder Section ~ ~ 6

3-21 Tuning Section ....... . ........... 7
SECTION 4. DIAGRAMS

4-1. Printed Wiring Boards ~~~~~~~~~~~~ 3

4-2. Schematic Diagram ----- . ~~~~~~~~~ 11
SECTION 5. EXPLODED VIEWS ~~~~~~~~~~ 15

SECTION 6. ELECTRICAL PARTS LIST .. 19

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

(0. 75 V}

AC
0,15uF-l: 7.5m / voltmeter

7' Earth Ground

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

SA FETY-R E LATED COMPONENT WARNING! !

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 PUE
LISHED BY SONV.

ATTENTION AU COMPQSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS lDENTIFIés PAR UNE MARQUE [A
sun LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES sour CRITIQUES noun LA sécumré
o: FONCTIONNEMENT. NE REMPLACER ces com.
POSANTS our: PAR DES PIECES sonv DONT LES
NUMénos sou-r DONNES DANS cs MANUEL ou
DANS LES SUPPLEMENTS PUBLIés PAR sonv.

_2_.