Sony CFD-V77S Service Manual page 50

FM VCO Adjustment
Procedure :
FM RF SSG
Carrier frequency : 98MHz
IF frequency : According to
the color of CF1.
Modulation : no modulation
Output level : 0.1V (100dB)
1. Connect frequency counter to the positions shown below.
2. Tune the set to 98MHz.
3. Adjust RV1 so that the frequency counter reading becomes
76,000 Hz.
Specification Value :
Frequency counter
75,950 – 76,050 Hz
0.01 µ F
IC1 Pin 4
33k Ω
IC1 Pin 7
Adjustment Location : MAIN board (See page 13)
0.01 µ F
to FM ANT IN terminal
Frequency counter
+
–
CF1
color
mark
— 12 —
BLACK 10.64MHz
BLUE 10.67MHz
RED 10.70MHz
ORANGE 10.73MHz
WHITE 10.76MHz