The 454 is old enough that contact oxidation is a problem. The transistors are
socketed and odd problems like a missing channel may be due to a poor contact.
I've fixed more than one scope of that vintage simply be reseating the transistors.
I have a 454 on my desk that I refurbed earlier this year. I really like being able
to read the controls without having to dig up a magnifier; it's my scope of choice
for when I need a quick look at something.
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On Tue, Dec 02, 2014 at 10:09:05AM -0800, aodiversen@... [TekScopes] wrote:
Maybe it looks more promising if you know that the 454 contains no Tek-made ICs. See also
Finding the fault in the second channel must be much easier than finding the fault in the HV unit. The fault can't be that far from the "entrance" and you can compare voltages/signals of both chanels. With some luck you only have to clean a switch!
Albert
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Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows
