Read Sony ICF-CD837 Service Manual online
14
ICF-CD837
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 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
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
Adjustment Location: See page 15.
TUNER SECTION 0 dB = 1 µV
SECTION 4
ELECTRICAL ADJUSTMENTS
• FM Section
Setting:
BAND switch: FM
VOLUME control: MIN
BAND switch: FM
VOLUME control: MIN
FM lead wire
antenna terminal
antenna terminal
FM RF signal
generator
generator
0.01
µ
F
set
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
deviation by 1 kHz signal
output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
• AM Section
Setting:
BAND switch: AM
VOLUME control: MIN
BAND switch: AM
VOLUME control: MIN
30% amplitude
modulation by
400 Hz signal
modulation by
400 Hz signal
speaker terminal
CNP302 (POWER Board)
CNP302 (POWER Board)
set
16
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
• 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.
done by the trimmer capacitors.
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