If your KAM+ is giving you garbage characters at all
serial speeds then the -5 volt supply has probably failed. This is a
common problem.
Check the voltage at Test Point B indicated below. It should be very close to -5 volts with less than 25 mV of ripple.
If the voltage is off then first replace the 3 capacitors, C48, C49, and C51, indicated by CAP below. All 3 are 10 microfarad 50 volt electrolytic capacitors. Be sure that they are install with the correct polarity (- toward the center of the board).
If the -5 volt is still off check Test Point C indicated below. If it is around -7 volts then change VR2 (LM79L05) but if it shows a low voltage (especially below -5 volts) then change U15 (LT1054CP).
Test Point Voltages
A +5V
B -5V
C ~-7V
D +5V
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