So I have an E3631A power supply on the bench. (Given to me) It turns on, beeps twice and comes up with output off. The FULL self test passes, NO ERRORS. If I recall correctly, it should only beep ONCE.
I can set the limits on all 3 supplies but when I enable the output on ANY of them, I have NO control to set voltage or current.
On output enable the +6v supply reads -.245vdc and .037A CC. Voltage reads same on external meter.
+25 reads .09v and .042A CV. Also correct on external meter.
-25 reads .29v and .028A CC. Also correct on external meter.
None are adjustable, even though the digit blinks and the encoder IS working.
Preliminary measurements show all voltages on the power rails as well as bias supplies are in spec, no shorted outputs. Seems the power stages are good. All fuses are good.
Aaand... it feels like a logic issue.... at which point I am totally out of my field of expertise.
Any thoughts? Seems that digital stuff and I just don't get along. No such problems with older HP analog stuff. But NOOOO... I wanna be FANCY!!
Where do I start on THIS one?