Electrical Adjustments - Sony ICF-C112 Service Manual

ICF-C112
FM SECTION 0 dB = 1 µV
Setting:
BAND switch: FM
VOLUME control: MIN
FM RF signal
generator
400Hz, 30% FM modulation
frequency deviation ± 22.5kHz
Output level: as low as possible
AM SECTION
Setting:
BAND switch: AM
VOLUME control: MIN
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
• Connecting Level Meter (FM and AM)
set
speaker terminal
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
8
SECTION 4

ELECTRICAL ADJUSTMENTS

FM lead wire
antenna terminal
0.01 µ F
set
Put the lead-wire
antenna close to
the set.
level meter
(range: 0.5–5 V ac)
16 Ω
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
86.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
86.5 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
515 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
600 kHz
Adjustment Location: See page 9.
CT6
109.5 MHz
CT5
109.5 MHz
T1
CT4
1,750 kHz
CT3
1,400 kHz