Products > Test Equipment
A broken HP 33120A
vaualbus:
so you suggest to use normal eletroliti caps in the 33120A? All this caps are bypass capicitor on the -18V and 18v rail?
If it is possible it even better for so I haven't to buy the caps.
vaualbus:
I've some update for you guys:
Fist I replaced all the caps and diode and now the display not work (The fronpanel fall from my desk so the vacum display could be broken but I don't see any crack), but the instrument still not produce any output.
The frontpanel a part from the display it work, I can move the encoder an hear the click, use buttons and ecc.
Probably I find some problem. The negative +15V read -20 meanwhile the positive +15V read only 9V.
I don't kno why I read this voltages?
PS Somebody have some frontpanel or vacum display to sell to me?
vaualbus:
I was wrong aboat the volatages I mesearud them with the wrong GND. Both 15 an -15 are right.
vaualbus:
Also how I can meseuare the output of the dac?
It seem a stupid question but it isn't the dac have a differential current output so I can't meseare that with a scope.
Any idea?
TiN:
Check getter on VFD. If there is white residue around getter, it means oxygen got in and vacuum is gone now.
If its metallic shiny, your display likely be okay.
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