FT-790R2_维修说明书手册_DL1RQ

1/11Service Instruction FT790RIICompiled and illustrated by DLIRQA.PLL Unit,Part I1)Reference OscillatorConnect the frequency counter to pin 16 of Q420 and adjust TC402 for 10,245 MHz+10Hz.Remove the counterTC402Pin 16 Q420nim808@T402T403T404gate 2 Q418Fig.1 (PLL/PA Board)2)Loop Resonant CircuitsConnect the RF voltmeter (Oscilloscop,Spectrum-Analyzer)to the gate 2 of Q418.Adjust T402,T403 and T404 for maximum RF voltage.Remove the Voltmeter.