Hi Luca,
I think 2465B and 2467B share the same supply schematics. Based on my experience with 2467B:
- Component diagram may have C1132 and C1115 swapped (wrong). While desoldering take a note of the original value to make sure.
- NTC resistors RT1010 and RT1018 drifted quite a bit on my unit and most importantly R1010 was open circuit with a burn mark, check R1019 too. I replaced them with flameproof resistors.
Ozan
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On Sat, Feb 3, 2024 at 01:22 PM, Luca wrote:
Hi all
Thanks for all your inputs. I found some Excel sheets about the capacitors and
will go through the boards first. Maybe I'll also do the big main board.. I
don't trust any late 80s until early 00s capacitors anymore I've seen too many
failed ones.
When I'm done with this or hit a snag I'll come back to this thread. Regarding
the Dallas, good idea recording the calibration data. I got a video with the
data for the 2465B. I hope I can do the same with the other scope after I get
it running again and nothing is lost yet.
The DS1230Y/AB still has batteries, that would have been to easy...
I found this document with several solutions for replacing the Dallas chips
(after going through that PDF I'll try to find the reasoning against and then
make a decision)
