SONY ICFF1 - Service Manual Immediate Download

ICF-F1

AEP Model

SERVICE MANUAL

FM/AM RADIO

SPECIFICATIONS

Frequency range:

FM : 87.5 - 108 MHz

AM : 526.5 - 1 606.5 kHz

Speaker

Approx. 10.0 cm (4 inches) dia., 8

Output

(earphone) jack (ø 3.5 mm minijack)

Power output

250 mW (at 10 % harmonic distortion)

Power requirements

4.5V DC, three R14 (size C) batteries

DC IN 4.5V jack accepts: Sony AC-E45HG AC

power adaptor (not supplied)

Dimensions

Approx. 130

× 237 × 71.5 mm (w/h/d)

(5 1/

8 × 9

8 × 2

8 inches) incl. projecting parts

and controls

Mass

Approx. 673.5 g (1 lb 8 oz) incl. batteries

Design and specifications are subject to change without notice.

Ver 1.0 2000. 05

-- 2 --

Notes on chip component replacement

· Never reuse a disconnected chip component.

· Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

· Keep the temperature of soldering iron around 270°C

during repairing.

· Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

· Be careful not to apply force on the conductor when soldering

or unsoldering.

SECTION 1

GENERAL

This section is extracted

from instruction manual.

-- 3 --

SECTION 2

DISASSEMBLY

Note :

Disassemble the unit in the order as shown below.

Cabinet (rear) assy

Set

Chassis assy

Speaker (SP1)

Vol board

Main board

Note :

Follow the disassembly procedure in the numerical order given.

2-1. CABINET (REAR) ASSY

4 Four screws (+BTP 3

× 12)

3 Two screws (+BTP 3

× 12)

1 Push the knob (Battery box).

2 Box, battery

Cabinet (rear) assy

8 Two screws

(+P 2.6

× 8)

7 Remove

solderings

Chassis assy

5 Knob (vol)

1 Knob

(tune)

2 O ring

(DIA 12.5)

6 O ring (vol)

4 E ring

3 Spring,

ring

3 Speaker (10 cm)(SP1)

Claw

Two claws

1 Spring, SP detent

2-2. CHASSIS ASSY

2-3. SPEAKER (SP1)

-- 4 --

2-4. VOL BOARD

7 Screw

(+P2.6

× 8)

Two claws

4 Pointer

5 Scale, dial

6 Rack

3 Vol board

8 Gear (A), tuning capacitor

2 Remove solderings

2-5. MAIN BOARD ASSY

1 Remove solderings

7 Remove solderings

5 Main board

8 LED board

2 Jack board

4 Two screws (+P 2.6

× 8)

6 Screw (+P 2.6

× 8)

3 Three screws (+BTP 3

× 12)

SECTION 3

ELECTRICAL ADJUSTMENTS

2-6. DIAL POINTER

-- 5 --

-- 6 --

Screw

CV1

1mm

Chassis

4 Scale, dial

Rack

Shaft (tune)

2 Rotate the Shaft (tune)

in the direction of the arrow fully.

1 Install the tuning capacitor gear (A) in the direction

as shown while it is aligned with CV1.

Rack

Pointer

Two claws

3 Push the rack deep inside at the position

of 1 mm away from the end surface

of the Chassis as far as it can go.

5 Attach the pointer as follows

: While aligning the hole of the

pointer with the projection

of the rack, engage the two

claws of the pointer with

the chassis.

BAND : AM

Signal generator

· Repeat the procedures in each adjustment several times for the

maximum level meter indication.

· The frequency coverage and tracking adjustments should be finally

done by the trimmer capacitors.

AM SECTION

FM SECTION

[Adjustment Location : Main board] (Component side)

Put the lead-wire

antenna close to

the set.

30% amplitude modulation by 400Hz

signal.

Output level : as low as possible

AM RF signal

generator

0.01

µF

FM RF signal

generator

telescopic

antenna

terminal

75kHz (100%) amplitude modulation

by 1kHz signal.

Output level : as low as possible

set

level meter

Speaker terminal (SP1)

AM IF ADJUSTMENT