K2 problems

[Robert Greenwalt-2]

I completed the baseline k2 kit but I seem to have some problems:

The Voltage measurements from pg17 of the trouble shooting section differs
from what I'm seeing in the receive case:
U4 5-pin should be 5 but I get 0
U4 7-pin should be 0 but I get 5
U5 1-pin should be 0 but I get 5
U5 2-pin should be 5 but I get 0.

I've traced through - U4, 5-pin is connected to U5-2 and 3 pins on the
control board.  I've followed the leads and they are clean.
 I've resistance checked them and everything appears properly connected.
 I've also checked resistance to ground and U4-5 is not shorted. Likewise
U4-7 connets to U5-1 and two chips on the control board. They seem to be
digital logic pins, so I wonder if the listed voltage is incorrect?
 Otherwise it seems one of my chips is bad.

Suggestions?

Thanks

Robert
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[Don Wilhelm-4]

Robert,

Can I assume correctly that you are asking about U4 and U5 on the RF
Board?  If so, yes, these are digital signals and yes, the voltages
listed are incorrect for normal measurements.  If you look with a
triggered oscilloscope during the active levels, the voltages will be
correct.

73,
Don W3FPR

Robert Greenwalt wrote:

> I completed the baseline k2 kit but I seem to have some problems:
>
> The Voltage measurements from pg17 of the trouble shooting section differs
> from what I'm seeing in the receive case:
> U4 5-pin should be 5 but I get 0
> U4 7-pin should be 0 but I get 5
> U5 1-pin should be 0 but I get 5
> U5 2-pin should be 5 but I get 0.
>
> I've traced through - U4, 5-pin is connected to U5-2 and 3 pins on the
> control board.  I've followed the leads and they are clean.
>  I've resistance checked them and everything appears properly connected.
>  I've also checked resistance to ground and U4-5 is not shorted. Likewise
> U4-7 connets to U5-1 and two chips on the control board. They seem to be
> digital logic pins, so I wonder if the listed voltage is incorrect?
>  Otherwise it seems one of my chips is bad.
>
> Suggestions?
>
> Thanks
>
> Robert
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