Tuner Section - Sony CFS-B7SMK2 Service Manual

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4-2.

TUNER SECTION

• FM Section
Setting :
BAND switch : FM
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz signal
output level : as low as possible
• MW Section
Setting :
BAND switch : MW
AM RF signal
generator
30% amplitude
modulation by 400 Hz signal
output level : as low as possible
• SW Section
TE
L 13942296513
Setting :
BAND switch : SW1 or SW2
FINE TUNE control : mechanical mid
AM RF signal
generator
30% amplitude
modulation by 400 Hz signal
output level : as low as possible
set
phones jack
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
• Remove telescopic antenna in FM section adjustments.
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0dB = 1µV
telescopic antenna
input
0.01 µ F
set
Put the lead-wire
antenna close to
the set.
telescopic antenna
input
11 PF
set
level meter
(range: 0.5 – 5 V ac)
32 Ω
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FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on Level meter.
L2
86.5 MHz (87.35MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on Level meter.
L1
86.5 MHz (87.35MHz)
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on Level meter.
L8
520 kHz (516 kHz)
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on Level meter.
L3
620 kHz
Q Q Adjust for a maximum reading on level meter
3 6 7 1 3 1 5
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on Level meter.
L6
2.2 MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on Level meter.
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on Level meter.
L4
6.8 MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on Level meter.
( ) : Saudi Arabia model
Adjustment Location : See page 10.
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CT2
109.5 MHz (107.8 MHz)
CT1
109.5 MHz (107.8 MHz)
FM IF ADJUSTMENT
T1
10.7 MHz
CT4
1,680 kHz (1,640 kHz)
CT3
1,400 kHz
AM IF ADJUSTMENT
0 5 8 2 9 9 4 2 8
T2
455 kHz
CT6
7.3 MHz
L5
2.25 MHz
CT8
22.5 MHz
L7
7 MHz
m
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