Sony icf c 620 service manual

Page 1

ICF-CGZII

SERVICE MANUAL us Model

Canadian Model
AEP Model

E Model
Australian Model

SPECIFICATIONS

Radio section
anuoncy range:
FM : 375 ~108.0MHZ
AM : 526.5 - 1606.5 kHz (Italian model)
530 , 1605 kHz (Except Italian model)

Tape player section and general

Ti din Ia
bxcepl AEP,
lialian model 12 0"
AEP, ltalinn model 24 hour

Track system : 2 track. 1 channel,monaura1

Froquoncy roaponoo : 125 - 10,000 Hz wnh
normal (TYPE I) tapes

Spookor : Approx. 7.7 cm (3 1/37 inches) dia. 8
ohms.

Power oulpui :
Radio section : 350 mW (at 10% harmonic

distortion)
Player section : 300 mW (at 10% harmonic
distortion)

Power roqulromonts :
120VAC, 60 Hz (US, Canadian. E model)
220V 7 230 V AC. 50 Hz (AEP. Italian,
Australian model)
For the power backup function 9 V DC. one
6F22 battery

Battery Ills : Approx. 80 hours (for clock backup),
using Sony ballery 5-006? (U)

Dim-Minna : Approx. 240 x 124 x 100 mm
(9 1/16 x 4 m x 3 15/16 inches) (w/nld) incl
projecting parts and controls

Mass : Approx. 370 g (1.9 lb. 30 oz.) not incl.
battery

Design and specificaiions are subject to change
without notice.

Model Name Using Similar Mechanism NEW

Tape Transpori Mechanism Type MIR-620

FEATU Fl ES

- High quality sound by tape playback.

- You can choose from 3 different walrc~up
modes , tape, radio, and buzzer alarm.

~ Power backup to keep the clock during a
power interruption with 3 «=22 battery (not
supplied) installed,

MODEL IDENTIFICMION
- Model Number Label ~

SONY. MODEL NO. lCF~C620

V/l/l/l/l/l/I/A

US, Canadian, E model :AC: 120V ~ 60Hz 5W
AEP, Italian, Austral/an model :AC :220 - 230V - 50Hz 5W

FM/AM CASSETTE PLAYER cLocK RADIO
S ()NY®

Page 2

SAFETY CHECK-OUT (US MODEL)

After corTecting 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 pans 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 measured by any one of three methods.

1. A commercial laekage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers instructions to use three
instruments.

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 aVOM
or battery-operated AC voltmeter. 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 thatis suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable (See Fig. A)

To Exposed Metal
Parts on Set

AC
voltmeter
(0, 75 V)

0.15uF T $1.5m /
.

.__J

"- Earth Ground

Flg. A. Uslng an Ac voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BV MARK A OR DOTTED LINE
WITH MARK A ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRII10AL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU poMPQSANT AYANT RAPPORT
A LA sacURITEIt

LES COMPOSANTS IDENTIFIEs PAR UNE MARQUEA sun LES
DIAGRAMMES SCHEMATIOUES ET LA LISTE DEs PIECES SONI'
CRIIIOUES POUR LA sEcunrrE DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIECES SDNV
D0NT LES NUMEROS SONT DONNES DANs CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIEs PAR SONY.

TABLE OF CONTENTS
1. SERVICE NOTE ............................................................... 2
2. GENERAL .......................................................................... 3

3. DISASSEMBLY

3-1. Cabinet (Rear) Assy
3-2. Power Transformer
3-3. Main Board...
34. Lid (Cassette)
3-5. Machanism Deck Assy
3-6. Pointer Setting .............

4. MECHANICAL ADJUSTMENTS

5. ELECTRICAL ADJUSTMENTS
5-1. Tape Recoder Section
5-2. Radio Section

6. DIAGRAMS
6-1. Printed Wiring Boards.
6-2. Schematic Diagram ..

7. EXPLODED VIEWS
7-1. Rear Cabinet Section
7-2. Front Cabinet Section

7-3. Mechanism Deck Section... 18
8. ELECTRICAL PARTS LIST ................................... 19
SECTION 1
SERVICE NOTE

0 SETTING THE POWER CORD
Set the power cord as illustrated below, then install the lower cabinet.

Power cord