I recently bought a Keithley 619 electrometer with the 6194 A and B modules and also got 2 new 6011 triax input cables. I can't get the 619 to respond to any volts or ohms readings, so I checked the power supply.
The 5, 15 and -15 supplies look great, but the one part of the transformer is to supply 33 volts AC to the two 6194 electrometer modules because they each have a transformer on them. I'm only getting 19 volts AC coming out of the main transformer, so I think this is where my problem is.
I tried switching the two AC inputs back and forth, but no help. Those switches read 0, 100.4 and 119.6 AC volts.
Also I have the power supply board out of the unit while taking these measurements.
Not sure if repairing this transformer is possible or if I could somehow add another transformer to get my 33 volts AC.
Thanks, Rob