So i got a 34401A for *at first glance* a fair price which turned on.
later at home, i did a self test and got slapped by lots of errors. All related to "current source failed" and one AC rms full scale failed.
no big deal, probably just a AD706 that had died.

the "HiPot damage" writing on the top wasnt such a red flag to me as it should have.

Yea.. thats probably the cause.
Ian did repair such a failure in the past, no big deal it seems.
i removed the ceramic hybrid and checked if its ok which it fourtainly was. all resistances matched the ones on xdev. thats 90%. good sign

So i followed the path of destruction...



even a trace is missing at the switch
even the red relay is welded shut
oh no
R104-R111
C100 C101
K103
L101, L102, L106
R118 R103
K101
S1
all blown it seems.

did they hipot test this with a lightning rod?
I hope U101 isnt shot. L110 L111 look fine, seems like C101 absorbed the full blow.
if its not repairable, i still got a case for my other one that seems to have visited a long distance trash bin throwing competition
and a working U102.
Now, i know where to get most parts but not all.
especially that red K101 relay and S1 Switch
Are there any equivalent types out there?
more to come once i cleaned up this mess and got some new parts.