[Elecraft] Help needed with KPA100

Tue Jun 18 09:30:01 2002

Thanks Phil,
I have checked all those.  All the voltages are correct on U1 except for pin
25 where I get 0 volts and I believe the chart says it should be 4.9V.  I am
in the process if checking the ribbon cable again.  First time it seemed to
be OK.  I still think its some kind of firmware problem but can't prove it
at this point.  Todd G.
----- Original Message -----
From: "Phil Wheeler" <[email protected]>
To: "Todd Gahagan" <[email protected]>
Cc: "Elecraft List" <[email protected]>
Sent: Tuesday, June 18, 2002 7:11 AM
Subject: Re: [Elecraft] Help needed with KPA100


> Todd Gahagan wrote:
>
> >I got to the point in construction where the KPA board is connected to
the
> >K2 via the ribbon cable.  The K2 won't see the amp.  I have checked
voltages
> >on the ICs contained on the amp board and all are proper.  All resistance
> >checks were also proper.  I don't have the correct firmware for the SSB
> >board but that is on its way from Elecraft.  I don't believe that could
be
> >the cause.  I have checked for bad solder joints, improper component
> >placement, etc. The secondary menu in the K2 firmware shows the PA
setting
> >with two dash marks behind it indicating that the PA is not present.
> >
>
> Todd,
>
> The troubleshooting sectin for the KPA100 says if PA menu parameter is
> missing:
>
> o Make sure U1 of PA is not installed backwards
> o Check all U1 voltages (two extensive tables at the end of the manual)
> o Check the ribbon cable for continuity
>
> 73, Phil
>
>
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