Sony ICF-J1 User manual

SERVICE MANUAL

Ver 1.0 2000. 12

FM/SW/MW 3 BAND RADIO

E Model

ICF-J1

SPECIFICATIONS

Frequency range:

FM: 87.5 – 108 MHz

SW: 4.75 – 18.0 MHz

MW: 530 – 1 605 kHz

Speaker

Approx. 9.2 cm (3 5/8 i ches) dia., 8 Ω

Output

v jack (ø 3.5 mm mi ijack)

Power output

350 mW (at 10 % harmo ic distortio )

Power requirements

3 V DC, two R20 (size D) batteries

Dimensions

Approx. 233 × 119.2 × 56 mm (w/h/d)

(9 1/4 × 4 3/4 × 2 1/4 i .) i cl. projecti g parts

a d co trols

Mass

Approx. 815 g (29 oz) i cl. batteries

Supplied accessories

(Middle Eastern model only)

Case (1)

Ha d strap (1)

Desig a d specificatio s are subject to cha ge

without otice.

Battery life (approx. hours)

When using FM SW/MW

So y alkali e 240 250

LR20 (size D) batteries

So y 120 130

R20 (size D) batteries

Features

• High power sou d

• Lo g battery life with two R20 (size D)

batteries

• High se sitivity

• Easy tu i g with the tu i g i dicator

– 2 –

TABLE OF CONTENTS

1. GENERAL ................................................................... 2

2. DISASSEMBLY ......................................................... 3

3. ASSEMBLY................................................................. 7

4. ELECTRICAL ADJUSTMENTS......................... 9

5. DIAGRAMS

5-1. Block Diagram ................................................................ 11

5-2. Printed Wiring Board ...................................................... 13

5-3. Schematic Diagram ......................................................... 15

6. EXPLODED VIEWS................................................ 17

7. ELECTRICAL PARTS LIST ............................... 19

SECTION 1

GENERAL

This section is extracted from

instruction manual.

Insert the #side of the battery first.

Inserte en primer lugar la parte #de la pila.

R 20 (size D) ×2

pila R20 (tamaño D) ×2

Pass the strap through the buckle.

Pase la correa a través de la hebilla.

Telescopic antenna

Antena telescópica

indicator

indicador

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

CF1

mark

Mark Center frequency

red 10.70 MHz

blue 10.67 MHz

orange 10.73 MHz

black 10.64 MHz

white 10.76 MHz

HOWTO CHANGETHE CERAMIC FILTERS

This model is used two ceramic filters of CF1 and CF3.

You must used same type of color marked ceramic filters in order

to meet same specifications.

Therefore, the ceramic filter must changed two pieces together

since it's supply two pieces in one package as a spare parts.

– 3 –

SECTION 2

DISASSEMBLY

• This set can be disassemble in the order shown below.

Note: Follow the disassembly procedure in the numerical order given.

LID, BATTERY CASE

Set Lid, Battery Case

“Knob (Tuning)”, “Knob (Volume)”

Chassis Section Main Board Chassis

Antenna, Ferrite-Red (MW) (L1)

Speaker (9.2 cm) (SP1)

“Antenna, Telescopic (FM/SW) (ANT1)”, “Cabinet (Rear)”

Open the battery case lid.

boss

lid, battery cas

tuning, spring

knob (volume)

hole

variable resistor (RV1)

Note: Insert the knob (volume) into

the variable resistor (RV1),

meeting both shapes of the hole

in the knob and the shaft of RV1 as shown.

knob (tuning

)

knob (volume)

O ring, P-9

“KNOB (TUNING)”, “KNOB (VOLUME)”

– 4 –

“ANTENNA, TELESCOPIC (FM/SW) (ANT1)”, “CABINET (REAR)”

CHASSIS SECTION

antenna, wire

Note: Arrange the antenna,

wire to the 4 slots.

claw

lug, 3

claw

screw

(P2.6

five screws

(BTP3

12)

cabinet (rear)

antenna, telescopic

(FM/SW) (ANT1)

terminal (+),

battery

terminal (–),

battery

chassis section

Remove two solders

of speaker lead wires.

MAIN Board

speaker lead wire (RED)

battery terminal (–)

lead wire (WHT)

GND

+ B

battery terminal (+)

lead wire (WHT/RED)

speaker lead wire

(WHT)

•

LEAD WIRE COLOR INDICATION

ON MAIN BOARD.

terminal (–),

battery terminal (+),

battery

Note: When mounting the battery terminals (+) and (–), engage the lead wires

to the hook on the cabinet (front) and route them as shown.

hook

cabinet (front)

– 5 –

Note: For the mounting position

of the antenna, ferrite-rod (MW) (L1),

refer to the “ANTENNA,

FERRITE-ROD (MW) (L1)”

in DISASSEMBLY.

claw

slider

claw

MAIN board

Note: On installation MAIN board

adjust the S1, S2 and

slider, knob (POWER).

gear (tuning capacitor)

Including “spring (gear)”,

“gear (B), tuning capacitor”.

Note: When the gear (tuning

capacity), spring (gear),

and the turning capacitor

gear(B) were removed

and then, they are mounted

on the main board,

refer to the “GEAR

(TUNING CAPACITOR)”,

“SPRING (GEAR)”, “GEAR

(B), TUNING CAPACITOR”in

ASSEMBLY on page 8.

Remove LED LN21RPL (TUNE)

(D2) by raising in the arrow direction,

not giving an excessive force.

knob

(POWER)

screw

(BTP3

12)

screw

(BTP3

12)

Remove three solders

of ferrite-rod (MW)

antenna (L1) leads.

screw

(B2.6

holder (gear)

()

MAIN BOARD

ANTENNA, FERRITE-ROD (MW) (L1)

Remove five portions bond

SC-12N.

Note: When mounting the antenna,

ferrite-rod (MW) (L1), route the lead wires

as shown and apply the bond SC-12N

to the removed portion.

antenna, ferrite-rod

(MW) (L1)

four claws

Remove three solders of

ferrite-rod (MW) antenna (L1)

lead wires.

•

FERRITE-ROD ANTENNA LEAD WIRE

COLOR INDICATION ON MAIN BOARD.

black lead wire

natural lead wire

red lead wire

MAIN board

BLK

NATURAL

RED

– 6 –

SPEAKER (9.2 cm) (SP1)

claw

Remove speaker (SP1) in the

direction of arrow

speaker lead wire (RED)

speaker lead wire

(WHT)

cabinet (front) claw

speaker (9.2 cm)

(SP1)

Remove shaded portion bond SC-108.

Note: When installing the speaker (SP1),

set it in the position as shown, and apply

the bond SC-108 to the removed portion.

CHASSIS

two claws

pointer

plate, back

rack

chassis

slider

Note: When assembling the chassis,

refer to the “DIAL POINTER SETTING”

in ASSEMBLY.

two claws

shaft, tuning

knob (power)

knob (band)

gear, midwa

– 7 –

SECTION 3

ASSEMBLY

Note: Follow the assembly procedure in the numerical order given.

DIAL POINTER SETTING

•RACK

• MAIN BOARD

pointer

Mount the back plate,

meeting with two bosses of

the chassis.

rack

gear, midway

shaft, tuning

boss chassis

boss

Meet the portion of

the rack with the mark

of the chassis.

chassis

mark

rack

claw

LED LN21RPL (TUNE) (D2)

screw

(BTP3

)

MAIN board

claw

– 8 –

• “GEAR (TUNING CAPACITOR)”, “SPRING (GEAR)” AND “GEAR (B), TUNING CAPACITOR”

“GEAR (TUNING CAPACITOR)”, “SPRING (GEAR)” AND “GEAR (B), TUNING CAPACITOR” SETTING

gear, midway

Turn variable condenser (CV1)

shaft fully to the arrow direction

(ant1-clok wise). Note: Make sure that two tuning capacitor gears

are meshing with the midway gear.

gear, midway

triangle mark

screw (B2.6

Note: Secure screw.

screw (BTP3

12)

holder (gear)

gear (tuning capacitor)

Including “spring (gear)”,

“gear (B), tuning capacitor”.

Note: Adjust so that the triangle

marked is at the position

shown and install.

()

gear (tuning capacitor)

Insert the spring (gear)

into a hole in the gear

(tuning capacitor).

Fit the tuning capacitor gear (B)

to the gear (tuning capacitor),

and then turn the tuning capacitor gear (B)

in the

direction.

Engage the spring (gear)

to the hook of the tuning

capacitor gear (B) as shown.

hook

spring (gear)