Electrical Adjustments - Sony ICF-C630 Service Manual

ICF-C630
FM SECTION 0 dB = 1 µV
Setting:
RADIO ON/OFF switch: ON
BAND switch: FM
VOL control: MIN
FM RF signal
generator
400 Hz, 30% FM modulation
frequency deviation ± 22.5 kHz
Output level: as low as possible
AM SECTION
Setting:
RADIO ON/OFF switch: ON
BAND switch: AM
VOL control: MIN
AM RF signal
generator
400 Hz, 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)
4 Ω
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
86.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
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.
L4
520 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600 kHz
Adjustment Location: See page 9.
CT3
109.5 MHz
CT2
109.5 MHz
T1
CT4
1,750 kHz
CT1
1,400 kHz