K1 test problem

[Leroy Bellefeuille]

I am a first time "K1" builder and am having a very difficult  time getting the proper voltage measurements for the test on page 46 of the manual.  
Test point J7 pin 8 should be 3.8vdc  I get "0"
The test points on Diodes "D9","D10","D11","D13", all measure "0"
Any suggestions as to how to go about troubleshooting these problems?  I have had no problems up to this point, but this has me stumped.    
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[Don Wilhelm-4]

You have no voltage coming into the T/R switch from the 6T voltage rail.
Do you have the 6T voltage anywhere?  Do a TUNE and check the voltage at
P1 pin 7 - it should be near 6 volts.  If OK there, you can go on, but
if nothing there, you will have to backtrack to the Front Panel Board -
the voltage comes from the MCU FP U1 pin 7 - check to see if there is
voltage there.

If you did have 6 volts at P1 pin 7, all is good on the Front Panel, so
go on to the RF Board.  Check the ends of R38.  If you have voltage at
one end, but not the other, check the R38 soldering.
R38 OK, then go on to check RFC3 - same thing, check for voltage at both
ends - check soldering if you have voltage at only one end.  If
soldering is OK, check the resistance of RFC3 - it should be quite low.

If RFC3 is fine and has voltage at both ends, check the orientation and
soldering of the diodes, particularly D9.

73,
Don W3FPR

On 5/4/2014 1:01 PM, Leroy Bellefeuille wrote:
> I am a first time "K1" builder and am having a very difficult  time getting the proper voltage measurements for the test on page 46 of the manual.
> Test point J7 pin 8 should be 3.8vdc  I get "0"
> The test points on Diodes "D9","D10","D11","D13", all measure "0"
> Any suggestions as to how to go about troubleshooting these problems?  I have had no problems up to this point, but this has me stumped.  
>

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[Mike Morrow-3]

> I am a first time "K1" builder and am having a very difficult
> time getting the proper voltage measurements for the test on
> page 46 of the manual.  
> Test point J7 pin 8 should be 3.8vdc  I get "0"
> The test points on Diodes "D9","D10","D11","D13", all measure "0"

Are you sure you performed this step correctly, just before taking the
voltage readings:

"Place the transmitter in TUNE mode (key-down), by holding
the W P M + and W P M - switches simultaneously."

Mike / KK5F
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[Elecraft mailing list]

I have no direct experience with the K1, but the first think I would look for is the diodes installed backward.  The band will be on the output (negative) end of the diode.  The next thing to look for is that all the diodes are open.  
 
Willis 'Cookie' Cooke, TDXS DX Chairman
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
On Sunday, May 4, 2014 12:02 PM, Leroy Bellefeuille <[hidden email]> wrote:
 
I am a first time "K1" builder and am having a very difficult  time getting the proper voltage measurements for the test on page 46 of the manual. 
Test point J7 pin 8 should be 3.8vdc  I get "0"
The test points on Diodes "D9","D10","D11","D13", all measure "0"
Any suggestions as to how to go about troubleshooting these problems?  I have had no problems up to this point, but this has me stumped.                          
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