Sony cfs 208 service manual

Page 1

CFS-208

SERVICE MANUAL

PHOTO : Italian model

US Model
Canadian Model
AEP Model

E Model
Austral/an Model

SPECIFICATIONS
AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION

With 3.2 ohm loads, both channels
driven, from 150 -10,000 Hz; rated
15 W per channel minimum RMS
power, with no more than 10% total
harmonic distortion in AC operation.

(US model)
Other specifications
Frequency range
FM AM
US Canadian. E 87.6 ~ 530 -
Australian model 108 MHz 1710 kHz
87.6 * 531 -
AEP Mex 107 MHz 1602 kHz
. 87.5 526.5 --
"31'3 mm 108 MHz 1606.5 kHz
Intermediate frequency FM 1017 MHz
AM 455 kHz
Antennas FM: Telescopioantenna

AM: Built Recording system 4-track 2-channel stereo
Frequency response 80 - 10,000 Hz
Speaker Full-range: 10 cm (4 Inches) dia. x 2

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type

M F-ZOB

Power output

Output

Canadian, E, Australian model :

2.3 W + 2.3 W (at 10% harmonic
distortion at DC operation)

AEP, Italian model 3 5,2W (2,6W+2.6W)
Headphones jack, to ~ 68 ohms
Impedance

Power requirements US. Canadian. E model : 120 V AC, 60 Hz

AEP, Italian model 1 220-230V AC. 50Hz
Australian model: 240 V AC, 50 Hz
9 V DC, six size D (R20) batteries

Power consumption 14 W

Battery life

Dimensions

Weight

Battery FM recording Playback
Sony SUM-1 (NS) 12 hours 7 hours
Sony AM-1 24 hours 14 hours

Approx. 470 x 155 x 150 mm (w/h/d)
(18 5/8 x 6 '/a x 6 Inches) IncL
projecting parts and controls
Approx, 301 kg (6 lb 13 oz), incl.
batteries

Accessory supplied AC power cord (1)

Design and specifications are subject to change without

notice.

RADIOCASSETTE-CORDER
S 0 NY;

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CFS-ZOB

TABLE OF CONTENTS

Section Title Page
Specifications ............................................................... 1

1. GENERAL
Location and Function of Controls
Tape Playback ~~
Listening to the Radio

2. DIAL POINTER INSTALLATION
Dial pointer Installation ......... r ..... . ......................... 5

3. ADJUSTMENTS

3_l' Mechanical Adjustments ......................... H. ........... 6
3,2. Electrical Adjustments ......................................... 6
4. DIAGRAMS

4-1. Printed Wiring Boards
4-2. Schematic Diagram ~

5. EXPLODED VIEWS .............................................. 17

ELECTRICAL PARTS LIST ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 21

9'

MODEL IDENTIFICATION
- Model Number Label -

SONY»
MODEL NO. CFS-208

RADIO CASSETTE

US. Canadian, E model : AC 120V~60Hz
AEP, Italian model 2 AC 220-230V~50Hz
AustraIian model : AC 240V~50HZ

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-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.

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-
vollage 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
Fan: on Set

AC
voltmeter
I0. 75 V}

0.15uF Ens/Isl
'._J

4-.»- Earth Ground

Fig. A. Using an AC vo/tmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNINGI I

COMPONENTS IDENTIFIED BY MARK A 0R 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.

ATTENTION AU COMPQSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MARoUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES soNT CRITIouEs POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES com-
POSANTS OUE PAR DES PIECES SONY DONT LES
NUMERos SONT DONNES DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

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