Thanks for the hint. My scope is the version over 50000.
Since the trimpots are right below the leak I will investigate further. I
don't think there is any contamination left at least what can be seen even
under UV light, but I will check the trim pots. It is possible something
creaped inside without me noticing.
O.
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On Tue, 9 Jun 2020, 19:37 Tom Miller, <tmiller11147@...> wrote:
If your scope is serial >50,000, the readout centering and gain
adjustments are on the A5 board. R2918 and R2931. Read the section on
CAL-07 for how to adjust.
On 6/9/2020 12:42 PM, Ondrej Pavelka wrote:
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?
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