I've got a unit that was probably dropped. I had to replace every exposed part
on the rear panel. I've got a PDF copy of a manual that's close but it's
woefully lacking in many areas, like how to get things apart and work on them.
Anyway, the sig gen operates fine but doesn't output anything in Spectrum
Analyzer mode. The scope works fine and DOES display spectrums. The unit
receives signals and measures modulation. A lot of it is working. Just a few
issues to deal with.
Does anybody out there have one of these they could pop the cover off and take
one voltage measurement for me? There's a signal called SW10V that's high in
all positions of the function switch except Spectrum Analyzer, and I suspect
one or more diodes on this switch may be bad, but before I dig into the unit
that deeply I'd like to confirm this signal. If it should be at +10V in SA
mode, that gives me something to look for. If it's 0V in SA mode on a working
unit, then this is obviously not the problem with mine.
I promise: No electrons will be hurt or damaged by this procedure.
If you know anyone who's intimately familiar with these units who might be
willing to discuss a few service techniques via e-mail, that would be good to
hear about.
Reply privately if you wish. Just maintain the subject so I know it's not spam.
Bob M.
