Sony cfs 1045 service manual

Page 1

(IFS-1045

SERVICE MANUAL

US Model
Taiwan Model

Model Name Using Similar Mechanism

CFS-1040

Tape Transport Mechanism Type

MF-1 045-102

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMON 1C DISTORTION
With 3.2-ohm loads, both channels driven, from 100 to 10,000 Hz; rated 1.5 W per
channel minimum, RMS power, with no more than 10 % total harmonic distortion in

AC operation.

Other specifications

FM: 87.6-108 MHz
AM: 530-1710 kHz
FM: Telescopic antenna
AM: Built-in ferrite bar

Frequency range

Antennas

Recording system
Frequency response
Speakers

Inputs

Outputs

Power output
(except for USA)

-l-track, 2~channel stereo
ice-10,000 Hz

Two way

10 cm (-1 inches) dia. full range x 2
2 cm (Vt/ii, inches) dia. tweeter x 2
CD/LINE IN jacks

(stereo pinjacks) (2)

input impedance 47 kilohms
sensitivity 0.3 V

PHONES jack (stereo minijack)
for 16-68 ohm impedance
headphones

Speaker terminals

for supplied 3.2 ohms
impedance speaker

2.3 W + 2.3 W (at 3.2 ohms, 10%
harmonic distortion in DC
operation)

Power requirements
Power consum ption

Battery life

120 V AC, 60 Hz

9 V DC, six size D (R 20) batteries

12 W in AC operation (USA model)
l8 W in AC operation (Taiwan model)

Batteries

FM recording

Tape playback

Sony SUM-1(NS)

Approx. 12 hours

Approx. 6 hours

Sony AMI alkaline

Approx. 27 hours

Approx. 16 hours

Dimensions

Mass

Accessory supp lied

Approx. 579 x 220 x 180.5 mm
(w/h/d)

(22 7/3 x 8 V; x 7 1/3 inches)
incl. projecting parts and
controls, not incl. handle
Approx. 4.8 kg (10 lb 9 oz)
incl batteries

AC power cord (1)

Design and specifications subject to change without notice.

RADIO CASSETTE-BORDER
SONY.

Page 2

TABLE OF CONTENTS

Section Title Page
Specifications .................................. 1
1. GENERAL
Location and Function of Controls ----------- 3
2. DISASSEMBLY ......................... 4
3. ADJUSTMENTS
3-1. Mechanical Adjustments . ---------- 7
3~2. Electrical Adjustments ~~~~~~~~~~~~~~~~~~~ 7
Tape Section .......................... . . . 7
Tuner Section ............................ 8
4. DIAGRAMS
4.1, Block Diagram ........................... 10
4-2. Printed Wiring Boards ~ 14
4-3. Schematic Diagram ----------------------- 17
5. EXPLODED VIEWS ~~~~~~~~~~~~~~ ~ ~~~~~ 21
6. ELECTRICAL PARTS LIST ~~~~~~~~~~~~ 26

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.

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 batteryvoperated 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 Set

1
I

OJSHF I 1.5km

'7- Earth Ground

AC
voltmeter
(0. 75 V)

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

SAFETY-RELATED COMPONENT WARNINGII

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.