Magnus Danielson wrote:
Fellow Time-nuts,
I have problem with a HP5372A, where the CRT failed and only shows a
vertical line of compressed graphics. Obviously something is broken in
the drive-side. So, does anyone have the schematics and possibly other
service info for the CRT module? I can't recall seeing any schematics
in the service manual, only module-level tuning.
I am sure it is close to trivial to fix, but it becomes easier with a
schematic at hand.
As I recall it, it looks like a standard CRT module and to be honest,
I am not very impressed about its functionality.
OK, a restless mind (mine) opened the box up since I was not going to
get any real work done anyway. Just looking around for potential
problems I found that a connector was suspicously brownish instead of
normal dull semitransparent whitish plastic. Just juggeling the cable
around and try it again proved that the connector was infact flakey and
I could even see some heat-fluxuations in the air above it. Redoing the
connector seems like the right thing to do and should be a quick fix.
Sometimes just follow gut feeling and opening things up and have a look
can be effective debugging.
I think this explains the flickering width that I have seen on that display.
I still want that schematic thought.
Cheers,
Magnus
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