Read Sony ICF-C630 (serv.man2) Service Manual online
8
ICF-C630
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
86.5 MHz
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT2
86.5 MHz
109.5 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
520 kHz
1,750 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
600 kHz
1,400 kHz
FM SECTION 0 dB = 1 µV
Setting:
RADIO ON/OFF switch: ON
BAND switch: FM
VOL control: MIN
RADIO ON/OFF switch: ON
BAND switch: FM
VOL control: MIN
AM SECTION
Setting:
RADIO ON/OFF switch: ON
BAND switch: AM
VOL control: MIN
RADIO ON/OFF switch: ON
BAND switch: AM
VOL control: MIN
SECTION 4
ELECTRICAL ADJUSTMENTS
• Connecting Level Meter (FM and AM)
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.
speaker terminal
set
4
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
Adjustment Location: See page 9.
FM lead wire
antenna terminal
antenna terminal
0.01
µ
F
FM RF signal
generator
generator
400 Hz, 30% FM modulation
frequency deviation
frequency deviation
±
22.5 kHz
Output level: as low as possible
set
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400 Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
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