Read Sony CFS-515L Service Manual online
– 10 –
FM VCO Adjustment
Procedure :
1. Connect the frequency counter to 4 and 7 pins of IC1 as shown
the figure below.
2. Turn the set to 98MHz.
3. Adjust RV1 for 75.95kHz – 76.05kHz reading on frequency
3. Adjust RV1 for 75.95kHz – 76.05kHz reading on frequency
counter.
[TUNER BOARD] (Conductor side)
FM RF signal
generator
generator
Carrier frequency : 90MHz
Modulation : no modulation
Output level : 65dB (1.8mV)
Modulation : no modulation
Output level : 65dB (1.8mV)
telescopic
antenna
terminal
antenna
terminal
set
0.01
µ
F
L7 : LW Tracking Adjustment
L4 : MW Frequency
Coverage Adjustment
Coverage Adjustment
CT5 :
L5 :
SW Tracking
Adjustment
Adjustment
CT7 : LW Tracking Adjustment
L3 : MW Tracking Adjustment
CT3 : MW Tracking Adjustment
L1 : FM Tracking Adjustment
CT1 : FM Tracking Adjustment
L6 :
SW Frequency
Coverage Adjustment
Coverage Adjustment
CT6 :
L8 :
CT8 :
T2 : FM IF Adjustment
T1 : AM IF Adjustment
RV1 : FM VCO Adjustment
L2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
CT2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
CT4 : MW Frequency Coverage
Adjustment
Adjustment
(Component side)
[TUNER BOARD]
LW Frequency
Coverage Adjustment
Coverage Adjustment
Adjustment Location : Tuner board
frequency counter
1
µ
F
33k
Ω
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