Section 4 Dial Pointer Setting; Section 5 Electrical Adjustments - Sony ICF-C160 Service Manual

DIAL POINTER SETTING
Note: Follow the assembly procedure in the numerical order given.
5 Turn CV1 and RV1 shaft in
the arrow direction fully.
CV1
RV1
main board
(Component side)
4 Install the knob (VOL)
with making position as
shown in Figure.
1 pointer
SECTION 4
3 Install the knob (TUNE) with
6 radio board
board shape position as shown
in Figure.
board shape
pointer
2 Set the pointer part A
portion to claw of chassis.
– 5 –
[FM]
Setting:
BAND switch: FM
FM RF SSG
0.01 µF
set
± 22.5 kHz frequency
deviation by 400 Hz
FM lead wire antenna terminal
signal
[AM]
Setting:
BAND switch: AM
Put the lead-wire
antenna close to
AM RF SSG
the set.
set
30% amplitude
modulation by
400 Hz signal
Outlet level: as low as possible
knob (tune)
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
A
done by the trimmer capacitors.
( ): Italian model
claw
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
86.5 MHz (87.35 MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
CT3
Frequency max
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
520 kHz (516.5 kHz)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
SECTION 5
ELECTRICAL ADJUSTMENTS
• Adjusting Location: RADIO board (Component Side)
L1: AM TRACKING
ADJUSTMENT
level meter
T1: AM IF
ADJUSTMENT
+
–
speaker terminal
level meter
+
–
speaker terminal
L4: FM FREQUENCY
COVERAGE
ADJUSTMENT
CT4: FM FREQUENCY
COVERAGE
ADJUSTMENT
Clock Frequency Check
Confirm that the reading on the frequency counter is 4800 ± 400 Hz.
CT4
If frequency is higher, change capacitor value of C27.
109.5 Hz (108.25 MHz)
If frequency is lower, change resistor value of R8.
frequency counter
+
–
CT2
1,650 kHz (1631.5 kHz)
CT1
1,400 kHz
– 6 –
CT3: FM TRACKING
ADJUSTMENT
CT1: AM TRACKING
ADJUSTMENT
IC1
CT2: AM FREQUENCY
COVERAGE
ADJUSTMENT
L2: AM FREQUENCY
COVERAGE
ADJUSTMENT
10 pF
IC2 pin !ª