Read Sony CFS-1055L Service Manual online
– 9 –
frequency counter
1
F
33k
Ω
µ
[ TUNER BOARD ]
+
VCO Adjustment
Procedure :
Procedure :
FM RF signal
generator
generator
set
0.01 F
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.032V (90dB)
Modulation : no modulation
Output level : 0.032V (90dB)
µ
telescopic
antenna
terminal
antenna
terminal
1. Connect the frequency counter to 4 and 7 pins of IC1 as shown
the figure.
2. Turn the set to 98MHz.
3. Adjust RV1 for 76 kHz
3. Adjust RV1 for 76 kHz
±
500 Hz reading on frequency counter.
Adjustment Location : Tuner board (Component side)
T1 : AM IF Alignment
L1 : FM Tracking Adjustment
CT1 : FM Tracking Adjustment
L21 : FM Frequency Coverage Adjustment
CT2 : FM Frequency Coverage Adjustment
CT4 : MW Frequency Coverage Adjustment
CT10 : LW Frequency Coverage Adjustment
SW Frequency Coverage Adjustment
CT6
CT5
L6
L5
L8 : MW Frequency Coverage Adjustment
L4 : LW Frequency Coverage Adjustment
CT3 : MW Tracking Adjustment
RV1 : FM VCO Adjustment
SW Tracking Adjustment
L3 : MW Tracking Adjustment
L9 : LW Tracking Adjustment
CT9 : LW Tracking
Adjustment
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