Resistors almost never fail shorted, I've never seen it happen. Check
for solder bridges, and look at the schematic and see what else could be
causing a 0ohm reading.
73, Ross N4RP
On 5/9/2014 1:14 PM, Glenn Haffly wrote:
Doing something I should have not done , I managed to blow up Q11on the
control board. I fixed that with a replacement from my junkbox. All
voltages are correct on control board U3. When tapping display I get a
voltage of 23.3 volts indicated from a 12 volt supply and zero current.
Further checking shows R7 on the control board is zero ohms instead of
1.78K. How important is it to replace R7
with a 1% resistor rather than something from the junkbox?
Everything else on the K2 works fine , TX and RX are OK.
Hopefully a replacement R7 will then display the correct voltage and
current.
Any input from the reflector is appreciated.
Glenn , K5ZE
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