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11
CFS-828S
FM VCO Adjustment
Setting:
BAND switch: FM
BAND switch: FM
Adjustment Location: – tuner board (component side) –
Procedure:
1. Connect the frequency counter to pins 4 and 7 of IC1 as shown
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.
3. Adjust RV1 for 76 kHz reading on the frequency counter.
Specification Value: 75.95 to 76.05 kHz.
telescopic
antenna terminal
antenna terminal
0.01
µF
FM RF signal
generator
generator
98MHz frequency deviation
by 1kHz signal
Output level: 0.1V (100dB)
by 1kHz signal
Output level: 0.1V (100dB)
set
33k
Ω
TUNER board
IC1 pin
4
IC1 pin
7
digital frequency
counter
counter
1
µ
F
IC1
30
16
15
1
CNP1
CT1, L1
FM
TRACKING
ADJUSTMENT
L7
SW2
TRACKING
ADJUSTMENT
CT2, L2
FM FREQUENCY
COVERAGE
ADJUSTMENT
CT4, L4
MW FREQUENCY
COVERAGE
ADJUSTMENT
MW FREQUENCY
COVERAGE
ADJUSTMENT
CT6, L6
SW1 FREQUENCY
COVERAGE
ADJUSTMENT
SW1 FREQUENCY
COVERAGE
ADJUSTMENT
CT8, L8
SW2 FREQUENCY
COVERAGE
ADJUSTMENT
SW2 FREQUENCY
COVERAGE
ADJUSTMENT
L9
FM IF
ADJUSTMENT
T1
MW IF
ADJUSTMENT
RV1
FM VCO
ADJUSTMENT
CT3, L3
MW
TRACKING
ADJUSTMENT
MW
TRACKING
ADJUSTMENT
L5
SW1
TRACKING
ADJUSTMENT
SW1
TRACKING
ADJUSTMENT
ANT1
FM/SW
TELESCOPIC
ANTENNA
– TUNER board (component side) –
L3
L9
RV1
EA model
E15, UAE model
L2
L8
CT8
L5
L6
CT6
L4
L7
L1
T1
CT2
CT4
CT1
CT3
L2
• Abbreviation
E15 : AC 220-240V area in E model
EA
EA
: Saudi Arabia model
UAE : United Arab Emirates model
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