Sony cfs e 50 service manual

Page 1

(IFS-E50

SERVICE MANUAL us Model

Canadian Model

MICROFILM

Model Name Using Similar Mechanism CFS~200
Tape Transport Mechanism Type MF-200

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 32 ohm loads, both channels driven, from ISO-10,000 Hz;
rated 1.5 W per channel minimum RMS power, with no more than
10 /0 total harmonic distortion in AC operation.

Other Specifications

Frequency range FM: 87.&108 MHz
AM: 530-1,710 kHz
Antennas FM: Telescopic antenna
AM: BuiIHn ferrite bar
Recording system (whack, 2~channel stereo
Frequency response 200-40000 Hz
Speakers 10 cm (4 inches) dia. x 2, tone type
Power output 23 W + 2.3 W (at 10 lo harmonic distortion in
(excluding USA model) DC operation)
Output Headphones jack, 16-68 ohms impedance
Power requirements 120 V AC, 60 Hz
9 V DC, six size D (R 20) batteries
Power consumption 10 W
Battery life Batteries FM recording Plavback

Sony SUM-i (NS) Approx. 18 hours Approx. 8 hours
Sony AMI (N) Approx. 30 hours Approx. 15 hours

alkaline
Dimensions Approx. 440 x 143.5 x 148 mm (w/h/d)
(17 3A x 5 3A x 5 7/15 inches) incl. projecting parts and controls
Mass Approx. 2.8 kg (61!: 3 01) inc]. batteries
Accessory suppiied AC power cord (1)
Optional accessories Sony "MDR" headphone series

Cassetre eraser BE-QH

Design and specifications are subject to change without notice.

RADlll CASSETlE-CBRDER
SONY®

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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 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-54OA. 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 0,7SV, 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)

Ta Exposed Metal
Part: on Set

A C
voltmeter
(0.75 V)

0.15uF

r.
§I.5kll /
L.

'4? Earth Ground

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

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 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.

TABLE OF CONTENTS

Section Title nge
1. DISASSEMBLY

1-1. Removal of Front Cabinet ........................ 3
1-2. Dial Pointer Setting .............................. 3
2. MECHANICAL ADJUSTMENTS .................... 4
3. ELECTRICAL ADJUSTMENTS

3-1. Tape Recorder Section .......................... 4
3-2. Radio Section .................................. .5
4. DIAGRAMS

4-1. Printed Wiring BoardeTuner Section- .......... 7
4-2. Schematic Diagram-Tuner Section-- ............ 8
4-3. Semiconductor Lead Layouts .................... 10
4-4. Printed Wiring Boards-Audio Section- ........ 10
4-5. Schematic Diagram-Audio Section- ............ 13
5. EXPLODED VIEWS

5-1. Front Cabinet Section .......................... 15
5-2. Rear Cabinet Section ............................ 16
5-3. Mechasism Deck Section 1 ...................... 17
5-4. Mechanism Deck Section 2 ...................... 18
6. ELECTRICAL PASTS LIST ...................... 19

ATTENTION AU.COMPDSANT AYANT RAPPORT
A LA SECURITEI

LES COMPOSANTS IDENTIFIES PAFI UNE MAROUE A
sun LEs DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA sécumré
DE FONCTIONNEMENT. NE REMPLACER :55 com-
FOSANTS QUE PAH DES PIECES SONY DONT LES
NUMEROS som DoNNEs DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR'SONY.