KXB3080 HELP KX1 will not turn on

[Chuck Gehring]

I have just finished Part I Modify the KX1 PCB section and now I am
attempting the steps for Alignment and Test -Part II for receiver alignment
to confirm that the modifications have been correctly installed.  Obviously
I messed something up.  Nothing happens during power up.  I get power up to
the power switch but when I turn on the switch nothing happens, no LED no
relays clicking nothing.  I had a KXB30 installed and completely removed the
KXB30 board and all wires.  I would really appreciate some help
troubleshooting this problem.
73 KI4DGH

Chuck Gehring
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[Ron D'Eau Claire-2]

Chuck, KI4DGH asked:

I have just finished Part I Modify the KX1 PCB section and now I am
attempting the steps for Alignment and Test -Part II for receiver alignment
to confirm that the modifications have been correctly installed.  Obviously
I messed something up.  Nothing happens during power up.  I get power up to
the power switch but when I turn on the switch nothing happens, no LED no
relays clicking nothing.  I had a KXB30 installed and completely removed the
KXB30 board and all wires.  I would really appreciate some help
troubleshooting this problem.

-------------------------------------------------------------

Do you have a metal screw holding the final amplifier mounting hardware
together, Chuck?

If you put a metal screw in the final amp without the heat sink, you're
shorting the B+ to ground!

Right off hand that's all I can think of at this point. All you've done is
remove the KXB30 module and reconfigure the receiver input circuit. That
doesn't involve any direct connections to the B+ circuitry.

If it's not the 'screw in the final amplifier' bit (which probably half of
the KX1 owners have done with the unit open, including me!) I'd look very
closely for a solder bridge somewhere around the components you just
replaced or the transformer you added.

Ron AC7AC

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[Chuck Gehring]

Ron,
Thanks, That is exactly what I did.  I put the screw in there to hold the
nylon shoulder in place while I worked on everything.  I removed the screw
and power came on.  Its nice to know that I am in good company.  BTW I
noticed that if I had gone to the KX1 Manual for trouble shooting that the
manual would have told me what I did and could have spared myself the public
humiliation.

Thanks again
73 KI4DGH

Chuck Gehring

-----Original Message-----
From: Ron D'Eau Claire [mailto:[hidden email]]
Sent: Saturday, March 25, 2006 7:05 PM
To: 'Chuck Gehring'; [hidden email]
Subject: RE: [Elecraft] KXB3080 HELP KX1 will not turn on


Chuck, KI4DGH asked:

I have just finished Part I Modify the KX1 PCB section and now I am
attempting the steps for Alignment and Test -Part II for receiver alignment
to confirm that the modifications have been correctly installed.  Obviously
I messed something up.  Nothing happens during power up.  I get power up to
the power switch but when I turn on the switch nothing happens, no LED no
relays clicking nothing.  I had a KXB30 installed and completely removed the
KXB30 board and all wires.  I would really appreciate some help
troubleshooting this problem.

-------------------------------------------------------------

Do you have a metal screw holding the final amplifier mounting hardware
together, Chuck?

If you put a metal screw in the final amp without the heat sink, you're
shorting the B+ to ground!

Right off hand that's all I can think of at this point. All you've done is
remove the KXB30 module and reconfigure the receiver input circuit. That
doesn't involve any direct connections to the B+ circuitry.

If it's not the 'screw in the final amplifier' bit (which probably half of
the KX1 owners have done with the unit open, including me!) I'd look very
closely for a solder bridge somewhere around the components you just
replaced or the transformer you added.

Ron AC7AC
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[Ron D'Eau Claire-2]

Chuck KI4DGH wrote:

Thanks, That is exactly what I did.  I put the screw in there to hold the
nylon shoulder in place while I worked on everything.  I removed the screw
and power came on.  Its nice to know that I am in good company.  BTW I
noticed that if I had gone to the KX1 Manual for trouble shooting that the
manual would have told me what I did and could have spared myself the public
humiliation.

------------------------------------

Super. Those of us with the ready answers are usually those who have done
the same thing ourselves.

Humiliation? Hardly. Just being human. I used to work on ships in port,
fixing things "Sparky" couldn't get right at sea. One of the first things
I'd say to Sparky when I went aboard was that he was going to be rather
irritated (P-O'd were the actual words) when I found the problem because
he'd know he had been looking at it all along. That was often true.
Sometimes it just takes a second pair of eyes to see what's under our noses
<G>

Any other questions, please holler! I've probably already made the mistake.
It's called "experience".

Ron AC7AC

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