FM Tracking AdjustmentFM Tuned Level Adjustment
Procedure:FM RF SSG
FM RF SSGoscilloscope75 W coaxial
setset
Carrier frequency : 98 MHz
SPEAKER terminal (JK501)Modulation: AUDIO 1 kHz, 75 kHzFM ANTENNA terminal
deviation (100%)(JK101)
FM ANTENNA terminal (JK101)
Output level: 28 dB (at 75 W open)
Carrier frequency : 90 MHz, 106 MHz
Modulation: AUDIO 1kHz, 75kHz deviation (100%)
Procedure:
Output level: 20 dB (at 75 W open)
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
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
JK501
AM Tuning
Voltage
FM Tuned Level
L105JK101
AM
TC102Tracking
SFR101
IC101
L104FM
Tracking
IC103IC102L102
TP1L103
TC101
FM Tuning
Voltage
N 12 N |
ACEC
