Chris,
The U5 Pin 3 to ground is not likely a problem - that reading will
depend on the exact setting of R3. You apparently have it set a bit
above the center position.
The U2 Pin 12 is another matter altogether, and *is* a problem. Look
for a solder bridge at U2 pin 12, U3 pin 12 and J1 pin 10.
On U2 and U3, the pins on either side of pin 12 are grounded, so I would
expect you will find the problem there. Use some solder wick and wick
away any excess solder. If the solder fills the thru-plated hole, that
is enough.
73,
Don W3FPR
CJA wrote:
I recently completed the resistance checks for the KAT100 and came up with
the following seemingly minor anomalies:
U2 Pin 12 to Ground: Target: >100K Measured: .1 Ohms
U5 Pin 3 to ground: Target: 45-55k Measured: 56.0k
Are these problem areas or do I need to trouble shoot? If these
measurements are problematic, I would greatly appreciate guidance on where
to start looking.
Thanks and 73,
Chris
K7CJA
K2#6442
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