Adjustment F1-T/S1-T - Alinco DJ-F1T Servise Manual

■ADJUSTMENT F1-T/S1-T

Item
1. Standard frequency
2. Output power
1) High power
2) Middle power
3) Low power
3. Transmitting spurious
4. Modulation
1) MIC modulation
adjustment
2) DTMF deviation
3) Sub-audible tone
modulation
5. Standard VCO voltage
6. AIR BAND
7. VHF front-end adjusting
8. S meter
Adjustment method
Transmit at 146.03 on L.C.D. board, then adjust TC201 so that the frequency
is 146.03M Hz ± 50Hz.
Adjusting point TC201
Transmit at 146.03MHz, then adjust VR202 so that the output power is.5.0W
when operating power source at 13.8V.
Adjusting point(s) VR202 main board
Transmit at 146.03MHz, then adjust VR203 so that the output power is 1.0W
when operating power source at 13.8V.
Adjusting point(s) VR203 main board
Transmit at 146.03MHz, then verify that the output power is between 80mW
and 200mW.
Transmit at 1144.03Hz, 146.03MHz and 147.99MHz, then verify the transmit­
ting spurious is as follows when operating voltage is between 6V and 14V.
High pow er.................................... under -6 0 d B
Low power...................................... under - 5 0 d B
Also verify no queer oscillation is occurring.
Transmit at 146.03MHz and input low frequency of 1kHz 50mV from MIC
input terminal. Then adjust VR201 so that the modulation is 4.5kHz.
Adjusting point(s) VR201 main board
Transmit at 146.03MHz and press the ten-key jT). Then adjust the VR3 so
that the modulation is 3.1kHz.
Adjusting point(s) VR3 CPU board
Set the sub-audible tone at 88.5MHz, then adjust VR1 so that the frequency
is 800H z when transmitting at 146.03MHz.
Adjusting point(s) VR1 CPU board
At the receiving condition, adjust L104 so that the voltage of P/D is 0.7V with
the frequency set at 146.03MHz.
Adjusting point(s) VCO board L204
At the transmitting condition verify that the voltage of P/D is between 0.5V
and 1.0V with the frequency set at 145.05MHz.
At the receiving frequency of 125.03MHz, input the signal of AM 1kHz 30%
output 8dBp (disconnection terminal) from SG. Then verify that the S/N is
more than 10dB. And, receivable from 118.00MHz to 142.99MHz.
At the receiving frequency of 146.03MHz, adjust L205, L207, L208 and
L209 so that the 12dB sind gets maximum sensitivity.
Adjusting point(s) L205, L207, L208, L209 main board
At the receiving frequency of 146.03MHz input the signal of 20dB/t from the
transceiver tester. Then adjust VR2 so that the FU11 in S meter starts
lighting.
Adjusting point(s) VR2 CPU board
1 8
Spec.
146.03M Hz±50H z
5W ±0.1W
1W ±0.1W
High Power
under -6 0 d B
Low Power
under -5 0 d B
4.5kHz ± 0.1kHz
3.1kHz ± 0.1kHz
80 0H z±10 0H z
0.8 ± 0.1V