Sony cfs 1025 service manual

Page 2

TABLE OF CONTENTS

Section A Title Page
Spuificafiom................. ................................... ....... 1
1. GENERAL

Location and Function of Controls ------------- . ------------------- 3
2. DIAL POINTER INSTALLATION ...... ................... 4
3. ADJUSTMENTS

3.1. Mechanical Adjustments .......... . ....... .................. 5

3-2, Electrical Adjustments ............................. ....... ..... 5
4. DIAGRAMS

41. Circuit Boards Location-
4-2. Printed Wiring Boards --

4.3, SchematicDiagram---~-------_ ........................ ........13

5. EXPLODED VIEWS

5,1. General Section (1).... ...... .. ............................ "-18

52 General Section (2)
5-3. Mechanism Section (1)................

6. ELECTRICAL PARTS LIST .................... .........

MODEL IDENTIFICATION
- Model Number Label -

SON
MODEL NO. CFS-1025

RADIO CASSETTE ~CORDER

///////////////////////

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

SAFETY-RELATED COMPONENT WARNINGH

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 ON IN SUPPLEMENTS PUB-
LISHED BY SONY.

ATTENTION Au cOMPQSANT AYANT RAPPORT
A LA SECURITEI

LES COMPOSANTS IDENTIFIEs PAR UNE MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LIsTE
DES PIECES SONT CRITIQUES POUR LA sécuané
DE FONcTIONNEMENT. NE REMPLACEFI ces COM-
POSANTS oUE PAR DES PIECES SONY DONT LEs
NUMERos SONT DONNES DANS CE MANUEL 0U
DANS LEs SUPPLEMENTS PUBLIES PAR SONY.

19
..20

5,4. Mechanism Section (2) ................. . ..................... 21

...22

SAFETY CHECK-OUT (US ModeII

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"
knobl, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC Ieakage 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. sneh as the
Simpson 229 or RCA INT-540A. Follow the
manufacturers' instmctions to use these instru-
meals.

to

A batteryoperated 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 limil 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 3 2V AC range are
suitable (See Fig. A)

To Exposed Metal
Pm: on Set

*fi

AC
swan voltmem
< {0.75 VI

'-' Earth Ground

0l15uF

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

0 HOW TO CHANGED THE CERAMIC FILTERS

This model is used three ceramic filteis of CFl, CFZ and CF3.
You must used same type of color marked ceramic filters in
order to meet same specifications.

Therefore, the ceramic filter must changed three pieces
together since its supply three pieces in on package as

a spare parts.

7/ a red 10.70MI-lz
CF1. 2 blue 10.67Ml-Iz
orange 10.73Ml-Iz

I I black 10.64MH2

white 10.76MHz