— 12 —
FM Tuned Level Adjustment
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Ω
open)
FM RF SSG
set
75
Ω
coaxial
FM ANTENNA terminal
(JK101)
Procedure:
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust SFR101 to the point (moment) when the TUNED indica-
tor will change from going off to going on.
Adjustment Location: MAIN board
FM RF SSG
oscilloscope
FM ANTENNA terminal (JK101)
SPEAKER terminal (JK302)
set
Carrier frequency : 90 MHz, 106 MHz
Modulation : AUDIO 1kHz, 75kHz deviation (100%)
Output level : 20 dB (at 75
Ω
open)
+
–
FM Tracking Adjustment
Procedure:
1. Tune the set to 90 MHz.
2. Adjust L102 so that when the waveform on the oscilloscope is
maximum, no noise appears.
3. Tune the set to 106 MHz.
4. Adjust TC101 so that when the waveform on the oscilloscope is
maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer
capacitors.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] — Component side —
FM Tuning Voltage
JK101
FM Tracking
AM Tuning Voltage
SFR101
FM Tuned Level
AM Tracking
TC101
TC102
L105
L104
L103
L102
IC103
JK302
IC102
TP1
IF
GND
VT
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