Electronics > Repair

Repair : HP 3245A precision DC/AC source

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Samogon:
Ok removed both source cards and here we are BBQ
Installed only CH1 card and we are alive, no errors, selftest passed.
So at least i have one good card and one toasted, this is much easier to repair since they are identical, so i even can do offline component comparison.
Not bad outcome.

TiN:
Sweet, now pimp it with LTZ!

nikonoid:
Samogon, congrats on having one channel working. Second should be fairly easy.

I have the 3245a version with 10x output (100V).

Even without LTZ mine is fairly good at 10V (give or take few ppm). Now 10x output is off by quite a bit +28ppm.  I cannot find a way to adjust that. The zero for 10x output is adjustable with a cal pot on a side.

Would anyone know if there a good way to adjust magnitude of 10x output?

Samogon:
I have Fluke 732A on the way, so i dont see reasons except curiosity  for LTZ. I rather would like to get x10 card. If i get  x10 i would get rid of Tek TM506 with TG506 sinse i need 50V square wave 1kHz

Samogon:
So far i have found K3 relay is stuck in open not latched, and mosfet Q901 short as i expected due to our burnt friend C900.
Something catastrophic happened.

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