Read Sony CFD-S27 Service Manual online
– 8 –
• 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.
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
CFT1
450kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter
Confirmation
531kHz
1.0 ± 0.2V
L4
1,611kHz
5.1 ± 0.2V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
621kHz
CT2
1,404kHz
FM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T1
10.7MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter
Confirmation
87.5MHz
1.3 ± 0.2V
L2
108MHz
3.5 ± 0.2V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz
TUNER SECTION
AM Section
Function switch : AM
Volume
Volume
: MIN
FM Section
Function switch : FM
Volume
Volume
: MIN
Frequency Coverage Adjustment
Setting :
[TUNER BOARD]
Adjustment Location :
Tuner board (See page 12)
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation by 400Hz signal.
Output level : as low as possible
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
set
32
Ω
J301 (phones)
level meter
C44
IC3
Digital voltmeter
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