Read Sony CFS-1085S Service Manual online
11
CFS-1085S
FM VCO Adjustment
Procedure :
1. Connect the frequency counter to 4 and 7 pins of IC1 as
shown the figure.
2. Turn the set to 98MHz.
3. Adjustment RV1 for 76kHz
3. Adjustment RV1 for 76kHz
±
500Hz reading on frequency
counter.
Adjustment Location :
telescopic
antenna
terminal
terminal
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.032V (90dB)
0.01
µ
F
set
C14
C15
C000
C000
C18
C20
C19
C5
R7
R8
R24
R11
R9
R16
R6
R4
R5
C4
C16
C17
C31
CF1
C9
C13
VR1
FINE
L2
B
C
E
Q2
IC1
TUNER BOARD
(Conductor side)
(Conductor side)
A
CN304
1
6
1
4
7
15
16
30
CF3
frequency
counter
1
µ
F
+
33k
33k
Ω
CT2 : FM Frequency Coverage Adjustment
L2 : FM Frequency Coverage Adjustment
CT4 : MW Frequency Coverage Adjustment
T1 : AM IF Adjustment
L3 : MW Tracking Adjustment
CT3 : MW Tracking Adjustment
CT1 : FM Tracking Adjustment
L1 : FM Tracking Adjustment
L4 : MW Frequency Coverage Adjustment
L8 : SW2 Frequency Coverage Adjustment
CT8 : SW2 Frequency Coverage Adjustment
CT6 : SW1 Frequency Coverage Adjustment
L6 : SW1 Frequency Coverage Adjustment
RV1: FM VCO Adjustment
L7 : SW2 Tracking Adjustment
L5 : SW1 Tracking Adjustment
(Component side)
TUNER BOARD
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