MICROFILM
SERVICE MANUAL
ICF-8
FM/AM RADIO
ICF-8L
FM/LW RADIO
AEP Model
UK Model
ICF-8/8L
E Model
ICF-8
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.
SPECIFICATIONS
ICF-8/8L
Photo: ICF-8
Ver 1.0 1998. 06
2
SECTION 1
GENERAL
This section is extracted from
instruction manual.
3
CABINET (REAR)
MAIN BOARD
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
2 three screws
(P2
× 8)
8 cabinet (rear)
3 two claws
3 two claws
4
7 telescopic antenna
1 Remove the battery lid.
3 two claws
6 lug
5 screw (B1.7
× 4)
9 cabinet (front)
1 Remove two solders
of the speaker leads.
4 two claws
2 battery terminal ()
5 MAIN board
A
3 battery terminal (+)
CV1
Note: On installation MAIN board,
turn CV1 shaft in the arrow
A
direction fully.
4
DIAL POINTER SETTING
Note: Follow the assembly procedure in the numerical order given.
· POINTER
· KNOB (TUNE)
1 pointer
5 knob (TUNE)
4 Insert the knob (TUNE) to the pointer
fitting the two gear portion of the knob (TUNE)
to the concave portion of the pointer.
3
hole
hole
knob (TUNE)
pointer
5
SECTION 3
ELECTRICAL ADJUSTMENTS
PRECAUTION
· Adjustment should be performed in the order given.
0 dB=1 µV
[FM]
Setting:
BAND switch: FM
[AM/LW]
Setting:
BAND switch: AM/LW
· Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
Adjustment Location: MAIN board (Component Side)
FM RF signal
generator
22.5 kHz frequency
deviation by
400 Hz signal.
Output level: as low as possible
FM antenna IN
level meter
set
earphone jack (J1)
32
+
0.01
µF
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
level meter
set
earphone jack (J1)
32
+
(
): Italian model, [
]: East European model
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
86.5 MHz (87.35 MHz) [64.0 MHz]
CT3
109.5 MHz (108.25 MHz) [109.5 MHz]
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
86.5 MHz (87.35 MHz) [64.0 MHz]
CT2
109.5 MHz (108.25 MHz) [109.5 MHz]
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT (ICF-8)
Adjust for a maximum reading on level meter.
L4
520 kHz (516.5 kHZ)
CT4
1,650 kHz (1,631.5 kHz)
AM TRACKING ADJUSTMENT (ICF-8)
Adjust for a maximum reading on level meter.
L1
620 kHz
CT1
1,400 kHz
LW FREQUENCY COVERAGE ADJUSTMENT (ICF-8L)
Adjust for a maximum reading on level meter.
L4
145 kHz
CT6
265 kHz
LW TRACKING ADJUSTMENT (ICF-8L)
Adjust for a maximum reading on level meter.
L1
160 kHz
CT5
240 kHz
AM Tracking
Adjustment
L1
CT1
FM Tracking
Adjustment
T1
AM IF
Adjustment
FM Antenna IN
CT2
L2
LW Tracking
Adjustment
L1
CT5
FM Frequency
Coverage
Adjustment
J1
CT3
L3
LW Frequency
Coverage
Adjustment
CT6
L4
AM Frequency
Coverage
Adjustment
L4
CT4