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8594E - Main Coil Sense Fail - Zero Fail - Span Sens Fail

Question asked by vins on Feb 25, 2015
Latest reply on Apr 1, 2015 by vins
Hello, my A7 board was apparently faulty. I have stored my analyzer for 1 year waiting to find a A7 board for a good price, finally I find one & now I can't run the freq cal.
I changed the A7 for the new one, run cal freq & every time I have:
CAL: Main coil sense fail
CAL: Zero fail
CAL: Span sens fail
So I thought it was faulty but I replaced the board for the old one & I have the same problem, last time I tested it CAL freq was working.
Is there any procedure to follow when changing A7 board or other part of my analyzer has died?
Thank you.