Read Sony ICF-18 Service Manual online
– 3 –
– 4 –
Note:
Follow the assembly procedure in the numerical order given.
SECTION 3
DIAL POINTER SETTING
1
Slide the pointer
to the inner part.
2
Turn the VC gear
fully in the arrow
B
direction.
3
Insert the pointer to the gear
fitting the concave position
of the pointer to the convex
position of the gear.
of the pointer to the convex
position of the gear.
pointer
A
Note: When take off the pointer,
remove to direction of the arrow
A
.
B
SECTION 4
ELECTRICAL ADJUSTMENTS
[AM Section]
Setting:
Band select switch: AM
Band select switch: AM
0dB=1
µ
V
[FM Section]
Setting:
Band select switch: FM
Band select switch: FM
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
FM RF SSG
±
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
signal
Output level: as low as possible
+
–
–
level meter
earphone jack
set
FM antenna terminal
8
Ω
AM RF SSG
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
earphone jack
set
8
Ω
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
75.0 MHz
CT1
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
75.0 MHz
CT2
109.5 MHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520 kHz
CT3
1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600 kHz
CT4
1,400 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
Adjustment Location: MAIN board (Component Side)
AM FREQUENCY
COVERAGE
CT3 L4
CT1
L3
FM FREQUENCY
COVERAGE
FM
antenna
terminal
terminal
L1
CT4
AM
TRACKING
T1
AM IF
L2 CT2
FM TRACKING
IC1
S1
(
BAND SELECT
)
SWITCH
FM
↔
AM
↔
OFF
JW4
Click on the first or last page to see other ICF-18 service manuals if exist.