Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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ktl
 
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Default HP 54201D scope, possible to repair

I might aquire a faulty HP54201D scope.

It appears to show the following errors:

ST1:
Failed Auto Scale test

ST 2:
The period measurement must be 500 ns ±20 ns to pass.
FAILED Chan 1 test RR [03] == Period measurement failu no vailid
signal present.
FAILED Chan 2 test RR [01] == Period measurement failu the period
measurement was too low.

Sometimes it appears that ch2 behaves the same as ch1.

Cal 3,4,5 and 6 fails as well.

Anyone that is familiar whith this scope

Question is, is it repairable or is it a no-go?




With best regards

Tomas Larsson
Sweden
http://www.naks.mine.nu for downloads etc.
ftp://ktl.mine.nu for uploads.

Verus Amicus Est Tamquam Alter Idem

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Default HP 54201D scope, possible to repair

Do any of the failures include a bad NVRAM?

I bought a 54501A that was failing an assortment of self-tests and
replaced the NVRAM module (I'm sure the battery was gone after 20
years), and it seems to work perfectly now.

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