Sony CFS-828SMK2 Service Manual page 11

FM VCO Adjustment
Setting:
BAND switch: FM
FM RF signal
generator
98MHz frequency deviation
by 1kHz signal
Output level: 0.1V (100dB)
TUNER board
IC1 pin 4
33k Ω
IC1 pin 7
Procedure:
1. Connect the frequency counter to pins 4 and 7 of IC1 as shown
the figure.
2. Tune the set to 98 MHz.
3. Adjust RV1 for 76 kHz reading on the frequency counter.
Specification Value: 75.95 to 76.05 kHz.
Adjustment Location: – tuner board (component side) –
L9
FM IF
ADJUSTMENT
RV1
FM VCO
ADJUSTMENT
CT2, L2
FM FREQUENCY
COVERAGE
ADJUSTMENT
T1
MW IF
ADJUSTMENT
telescopic
antenna terminal
0.01µF
set
digital frequency
counter
1 µ F
– TUNER board (component side) –
L3
L9 RV1
L2
1 30
CT2
IC1
CT1
15 16
CT3
T1
L1
CT1, L1
FM
TRACKING
ADJUSTMENT
ANT1
FM/SW
TELESCOPIC
ANTENNA
CNP1
CT6
L6
L4
CT8
L8
CT4
L5
L7
L7
SW2
TRACKING
ADJUSTMENT
CFS-828SMK2
CT6, L6
SW1 FREQUENCY
COVERAGE
ADJUSTMENT
CT4, L4
MW FREQUENCY
COVERAGE
ADJUSTMENT
CT8, L8
SW2 FREQUENCY
COVERAGE
ADJUSTMENT
L5
SW1
TRACKING
ADJUSTMENT
CT3, L3
MW
TRACKING
ADJUSTMENT
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