Hi all,
I have found an old hp5326a that I would like to repair because I like to
restore old equipment.
Almost everything works apart input A. The problem seems to stay on the
input board p/n 05327-60034, because even swapping the two boards
connected
to it to handle the triggering for A and B, the problem remains on A.
By comparing channels A and B, I see that in the working channel the
trigger
level pot changes a voltage on the connector going to the respective
trigger
board, while this doesn't happen on the other channel. The corresponding
line goes to a metal can, 6 pin chip marked 5-334.
Unfortunately I couldn't find the schematic on the net (for free or at
least
cheaper respect to what I payed the instrument...). Neither I was able to
find any info about the chip: I tried something like 1855-0344 but I later
discovered that, in hp numbering, xxx5 is never used for ICs.
I wonder if someone can help...
(my real mail is on the web page)
Regards,
--
RoV - IW3IPD
http://digilander.libero.it/rvise/
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