Electrical Adjustment - Sony ICF-C211 Service Manual

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ELECTRICAL ADJUSTMENTS
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TUNER SECTION
AM/LW Section
Procedure :
BAND : AM (C211)
LW (C211L)
VOLUME : MIN
AM RF signal
Put the lead-wire
generator
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Procedure :
BAND : FM
VOLUME : MIN
FM RF signal
generator
0.01µF
antenna
terminal
(JW1)
22.5kHz frequency deviation by
T E
L 1 3 9 4 2 2 9 6 5 1 3
400Hz signal.
Output level : as low as possible
level meter
32 Ω
set
speaker terminal
w w w
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SECTION 3
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
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AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
C211
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz <516.5kHz>
CT4 1,750kHz <1631.5kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 620kHz
CT1 1,400kHz
C211L
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 145kHz
CT6 265kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 145kHz
CT5 265kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 86.5MHz <87.35MHz>
CT3 109.5MHz <108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5MHz <87.35MHz>
CT2 109.5MHz <108.25MHz>
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Adjustment Location : Main board (Component side)
ICF-C211
> : Italian model
L3 : FM Frequency Coverage Adjustment (Except IT model)
L3 : FM Frequency Coverage Adjustment (IT model)
L4 : AM Frequency Coverage Adjustment
ICF-C211L
L3: FM Frequency Coverage Adjustment
Q Q
3 7 6 3 1
L4 : LW Frequency Coverage Adjustment
.
2 4
9 9 8
T1 : AM IF Adjustment
JW1
L2 : FM Tracking Adjustment
L1 : AM Tracking Adjustment
CT3 : FM Frequency Coverage Adjustment
CT2 : FM Tracking Adjustment
CT4 : AM Frequency Coverage Adjustment
CT1 : AM Tracking Adjustment
T1 : AM IF Adjustment
JW1
L2 : FM Tracking Adjustment
5 1 5 0 8 9 2 4
L1 : LW Tracking Adjustment
CT3 : FM Frequency Coverage Adjustment
CT2 : FM Tracking Adjustment
CT5 : LW Tracking Adjustment
CT6 : LW Frequency Coverage Adjustment
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