I was getting ready to verify the AGC voltage on a one year old working
K2 when my probe slipped while trying to read the voltage on pin 5 of U2.
The K2 locked up sending continuous dots and no buttons function
on the front panel.
The dispaly locked up on the last frequency it was reading and the tuning
dial
has no effect on it.
Maybe I shouldnt have done this but I decided to try a master reset just in
case. Which didnt solve the problem --- but the k2 did reset. But its
still
hung up but this time with a dash all the time rather than continous dots.
According to the voltage readings on U2 of the control panel,
pin 3 has only .27 volts on it.
While pin 6 and 7 both read 3.8V. So it would appear that the probe
slipping
has caused U2 to fail? I can adjust the agc threshold voltage for the
proper
3.8V on pin 5.
I dont have a spare LM833 on hand to be able to confirm thats what
happened but it would appear so.
Am I the only one who has had the probe slip on U2 while trying to read the
AGC Threshold Voltage?
Frank W7is
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