FM Tracking AdjustmentFM Tuned Level Adjustment
(US, Australian, Mexican model)
FM RF SSG
Procedure:75 W coaxial
FM RF SSGoscilloscope
set
set
Carrier frequency : 98 MHz
Modulation: AUDIO 1 kHz, 75 kHzFM ANTENNA terminal
deviation (100%)(JK101)
SPEAKER terminal (JK703)
Output level: 28 dB (at 75 W open)
FM ANTENNA terminal (JK101)
Carrier frequency : 90 MHz, 106 MHzProcedure:
Modulation: AUDIO 1kHz, 75kHz deviation (100%)
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
Output level: 20 dB (at 75 W open)
2. Tune the set to 98 MHz.
1. Tune the set to 90 MHz.3. Adjust SFR101 to the point (moment) when the TUNED
2. Adjust L102 so that when the waveform on the oscilloscope isindicator will change from going off to going on.
maximum, no noise appears.
3. Tune the set to 106 MHz.Adjustment Location: MAIN board
4. Adjust TC101 so that when the waveform on the oscilloscope
is maximum, no noise appears.
Y 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] N Component side N
TC102(AM
L104 Tracking)
SFR101L105
(FM Tuned Level)(AM Tuning
Voltage)JK101
IC103
L102(FM
TC101 Tracking)
L103
(FM Tuning
Voltage)
IC301
SFR809
(Tape speed)
N 14 N |