RS-232 communication failure KPA100

[Per Enocson]

My PC to KPA100 communication suddenly failed. Checked the cabling and did some initial tracing from J8 to U4. Seems ok incl. RFC:s. I found deviating voltages on U4 pins:
2 -5,5
3 -10,7
4,5,6   -5,5
7,8 -10,7
with remaining U4 pin readings ok. Then tried to find the 16293 kHz signal on my SW receiver but couldn´t hear it. I however find  -75 V at the end of the diode chain.....so is the HV xtal oscillator at fault or not? Any suggestion on what to do next is much appreciated!
Thanks, 73, Per  SM0WRA .
K2 no 1623, K1, KX1

[David Pratt-2]

In a recent message, Per Enocson <[hidden email]> wrote ...
>My PC to KPA100 communication suddenly failed. Checked the cabling and did

It looks very much as though the problem is with your computer, Per.
Your message to the Reflector was send no fewer than five times.

Hope you manage to solve the problem.

73
--
David G4DMP
Leeds, England, UK
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