Symptom:
Proper microphone gain/ALC readings cannot be obtained unless the user adjusts the TX GAIN potentiometer on the rear of the DSP-100. This irregularity is caused by an instability of the DSP-100 MIC amplifier (IC-5).
Corrective action:
Remove capacitor C200 from the IF unit on the transceiver, and replace it with R300, a chip jumper wire.
Parts required:
Qty
Description
Kenwood Part No.
Circuit description
1
Chip jumper
R92-0670-05
R300
Time required for this modification is 1 hour or less.