Sony ICF-C1200 US Service Manual page 5

VCO Adjustment
Procedure :
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : No modulation
Output level : 1.38mV (–55dB)
1. Connect the frequency counter to TP (76k) and TP (3V) as shown
the figure below.
2. Turn the set to 98MHz.
3. Adjust RV101 for 76kHz reading frequency counter.
Standard value:75.5kHz to 76.5kHz.
MAIN BOARD (SIDE A)
33k Ω
TP(3V)
C210
C208
D109
C207
Q202
9
8
IC201
C205
12 5
R204
BCE
1
16
C212
Q201
C203
TP
(3V)
Adjustment Location:
[MAIN BOARD] (SIDE A)
L103: FM Tracking Adjustment
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telescopic
antenna
terminal
µ
0.01 F
set
frequency
counter
1 µ F
+
+
TP1 (76k)
CT102
D108
L101
L104
C113
C215
C108
CF101
TP
C118
(76K)
C202
T101
C201
CT102: FM Tracking Adjustment
1-
L102: AM Tracking Adjustment
CT101: AM Tracking Adjustment
L105: AM Frequvency Coverage Adjustment
RV101: VCO Adjustment
T101: AM IF Adjustment
ICF-C1200
5