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3325B fail 026 - any advice?


 

Hi,

I'm still working on my 3325b to fix the fail 026 error. Unfortunately
it is not as simple as a bad connection. I'm going through the
adjustment/troubleshooting guide, I purchased the Artek manual, so I
have fairly good schematics (although I have already spotted
differences from real life, but nothing major)
There is output and the amplitude of the sine wave seems to be about
right, but i get the fail 026 and I also fail to be able to perform
the section 5-14 Sine Wave Gain Offset adjustment. The left side
number never gets to between -10 and 10 it is way off (~900).
All other waveforms are good and calibrate ok.

I'm now going through the amplitude control circuit, but I'm asking if
there are any known common issues with it, or any leads I should start
investigating first.

Thanks.

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