[time-nuts] Repair of 5370B input channels
John Ackermann N8UR
jra at febo.com
Thu Jun 8 19:42:14 EDT 2006
Jim Miller said the following on 06/08/2006 07:33 PM:
> I recently acquired two 5370B counters with bad input channels. One
> has a bad start channel,
> the other a bad stop channel. I have traced the problem to the input
> board A3, which is the board directly behind the BNC connectors on
> the front panel.
> Has anyone had any luck repairing the input circuitry in these
> units? Is there a common failure mode that occurs when signal levels
> are exceeded?
Jim, I'm not certain but I think that there are some magic parts on the
input board that are pretty much impossible to obtain -- and the inputs
are relatively fragile and won't survive excess voltages. Sorry for the
bad news; you might be able to merge the two blown boards into one
working one, though. I have the service manual if you want to borrow it.
More information about the time-nuts