The 2465B manual is 100% the same on the A5 board, HV supply, and
power supply, but about 95% the same on everything else. There are
a couple of extra trimmers on the A1 board, that relate to transient
response.
There are a couple of slight differences in the calibration routines
to accommodate the missing/extra trimmers.
All the hybrids are nominally the same... the 2465B used some that
were selected for better performance...
-Chuck Harris
Ondrej Pavelka wrote:
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So here's a update, I have completely rebuilt the impacted sections of A5 board, added a socket for the Dallas chip but unfortunately that didn't really had impact on neither of my issues.
I can see the switch scan matrix working fine, all the mux and demux works correctly and reference voltages are what they should be -1.25 and +1.36
I am starting to suspect vertical amp to be the reason for low vertical amplitude because the problem is across all the channels.
The instability of the readout is still there and I noticed while readout is shifted slightly down.
Where is the readout positioning on the screen? Is that separate board? I only have 2445 manual and 2465B. Can't find the 2445B manual anywhere.
Is it ok to go by the 2465B manual for the suspected issues as well or is it not so easy?
