— 13 —
FM VCO Adjustment
Procedure :
1. Connect frequency counter to the positions shown below.
2. Tune the set to 98MHz.
3. Adjust RV1 for 76kHz ± 50Hz reading on the frequency
counter.
0.01
µ
F
FM RF SSG
to ANT IN terminal
Carrier frequency : 98MHz
IF frequency : According to
the color of CF1.
Modulation : no modulation
Output level : 0.1V (100dB)
Frequency counter
0.01
µ
F
+
–
33k
Ω
IC1 Pin
4
IC1 Pin
7
RED
10.70MHz
BLUE
10.67MHz
ORANGE
10.73MHz
BLACK
10.64MHz
WHITE
10.76MHz
color
mark
CF1
Adjustment Location : MAIN board (Component side)
CF1
T2
L2
L4
L3
T1
RV1
IC701
CV1 (1/4)
CV1 (2/4)
L1
L2
FM Tracking
CV1 (3/4)
L3
AM Tracking
FM Frequency Coverage
Adjustment
CV1 (4/4)
L4
ANT IN
AM Frequency Coverage
Adjustment
T2 : AM IF
RV1 : FM VCO
T1 : FM IF
IC1 : VCO IN
FM IF IN
’
‘
IC1
15
11
16
18
1
30
4
