Sony ICFJ-1 Service manual
ICF-J1
SERVICE MANUAL
Ver 1.0 2000. 12
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
Output
v jack (ø 3.5 mm minijack)
Power output
350 mW (at 10 % harmonic distortion)
Power requirements
3 V DC, two R20 (size D) batteries
Dimensions
Approx. 233 × 119.2 × 56 mm (w/h/d)
1
3
/
× 4
(9
and controls
Mass
Approx. 815 g (29 oz) incl. batteries
/
4
5
/
inches) dia., 8 Ω
8
1
× 2
/4 in.) incl. projecting parts
4
E Model
Battery life (approx. hours)
When using FM SW/MW
Sony alkaline 240 250
LR20 (size D) batteries
Sony 120 130
R20 (size D) batteries
Features
• High power sound
• Long battery life with two R20 (size D)
batteries
• High sensitivity
• Easy tuning with the tuning indicator
Supplied accessories
(Middle Eastern model only)
Case (1)
Hand strap (1)
Design and specifications are subject to change
without notice.
FM/SW/MW 3 BAND RADIO
SECTION 1
3
GENERAL
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
Telescopic antenna
Antena telescópica
indicator
indicador
Pass the strap through the buckle.
Pase la correa a través de la hebilla.
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
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.
HOW TO CHANGE THE 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.
Mark Center frequency
CF
mark
CF1
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
– 2 –
• This set can be disassemble in the order shown below.
e
)
SECTION 2
DISASSEMBLY
Set
Note: Follow the disassembly procedure in the numerical order given.
Lid, Battery Case
“Knob (Tuning)”, “Knob (Volume)”
Chassis Section Main Board Chassis
Antenna, Ferrite-Red (MW) (L1)
Speaker (9.2 cm) (SP1)
LID, BATTERY CASE
“Antenna, Telescopic (FM/SW) (ANT1)”, “Cabinet (Rear)”
“KNOB (TUNING)”, “KNOB (VOLUME)”
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.
variable resistor (RV1)
2
boss
knob (volume)
1
Open the battery case lid.
2
boss
3
lid, battery cas
2
tuning, spring
3
knob (tuning
hole
– 3 –
5
O ring, P-9
1
4
6
knob (volume)
“ANTENNA, TELESCOPIC (FM/SW) (ANT1)”, “CABINET (REAR)”
6
antenna, telescopic
(FM/SW) (ANT1)
2
claw
3
2
claw
4
screw
(P2.6
5
lug, 3
×
8)
Note: Arrange the antenna,
wire to the 4 slots.
antenna, wire
1
7
cabinet (rear)
five screws
(BTP3
×
12)
CHASSIS SECTION
Note: When mounting the battery terminals (+) and (–), engage the lead wires
to the hook on the cabinet (front) and route them as shown.
terminal (–),
battery
hook
cabinet (front)
2
terminal (+),
battery
terminal (+),
battery
3
terminal (–),
battery
1
Remove two solders
of speaker lead wires.
•
LEAD WIRE COLOR INDICATION
ON MAIN BOARD.
MAIN Board
speaker lead wire (RED)
speaker lead wire
(WHT)
SP
3
SP
#
GND
+ B
– 4 –
4
chassis section
battery terminal (–)
lead wire (WHT)
battery terminal (+)
lead wire (WHT/RED)
Note: For the mounting position
of the antenna, ferrite-rod (MW) (L1),
refer to the “ANTENNA,
FERRITE-ROD (MW) (L1)”
in DISASSEMBLY.
7
claw
slider
7
claw
8
MAIN board
Note: On installation MAIN board
adjust the S1, S2 and
slider, knob (POWER).
5
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 CAPA CIT OR” in
ASSEMBLY on page 8.
6
Remove LED LN21RPL (TUNE)
(D2) by raising in the arrow direction,
not giving an excessive force.
knob
(POWER)
S2
S1
2
screw
(BTP3
×
12)
2
screw
(BTP3
×
12)
1
Remove three solders
of ferrite-rod (MW)
antenna (L1) leads.
4
screw
(B2.6
×
5)
3
holder (gear)
()
MAIN BOARD
2
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.
4
antenna, ferrite-rod
(MW) (L1)
3
four claws
1
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
ANTENNA, FERRITE-ROD (MW) (L1)
– 5 –
SPEAKER (9.2 cm) (SP1)
y
3
Remove speaker (SP1) in the
direction of arrow
2
claw
A
A
.
speaker lead wire (RED)
3
speaker lead wire
(WHT)
#
cabinet (front)
1
speaker (9.2 cm)
(SP1)
claw
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
Note: When assembling the chassis,
refer to the “DIAL POINTER SETTING”
in ASSEMBLY.
qa
plate, back
qd
chassis
qs
3
slider
rack
2
two claws
1
knob (band)
2
two claws
7
two claws
8
6
shaft, tuning
gear, midwa
0
pointer
9
two claws
– 6 –
5
knob (power)
4
4
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