— 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: TUNER board
FM RF SSG
oscilloscope
FM ANTENNA terminal (JK101)
SPEAKER terminal (JK501)
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: TUNER board
Adjustment Location
[TUNER BOARD] — Component side —
CN101
JK101
L103
TP2 (VT)
TC101
FM Tracking
SFR101
FM Tuning Voltage
FM Tuned Level
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TEL 13942296513 QQ 376315150 892498299
