Following up on this post after 8 years. I've had two kids and received a BSEE since I started this thread. This has happened before, but it's always funny when I google a problem and the first result was my own post from years ago.
I did end up getting this generator mostly off the ground in 2015 and I've attached some of my results.
Here's what I recall doing:
- Backed up all of the settings and presets to a floppy (still worked after all these years)
- Fixed traces on the memory board as necessary (this resolves wave sections at the wrong Y position)
- Replaced the supercapacitor for good measure
- Replacing all SMT aluminum caps on the socketed PC boards (with the exception of those in the RF cage
- Replaced the CMOS battery on the host board (did NOT replace the 10-12 electrolytic caps on that board)
- Reload all the settings
The generator performed pretty well after that. The clock generation seemed on point, and the vertical amplifiers were within reasonable accuracy.
Two calibration issues persisted:
[NOTE: Just noticed that CH1 and CH2 are reversed between the scope and Generator, I have edited to reflect this as AWG-CH1 to say CH1 on the generator)
After power-on:
CH1 Fail [690]
CH2 Fail [620]
After 90 minutes of usage:
CH1 Fail [642]
CH2 Fail [620]
Also, compare the trace close-ups in one of the JPEGs. AWG-CH1 looks much worse than AWG-CH2. Admittedly, I see now that the scope vertical setting is twice what AWG-CH2 shows, but I recall thinking at the time after much comparison that AWG-CH1 was def in worse shape.
I need to calibrate some reel-to-reel decks, and this generator should be fine for that. My next move will be to disassemble and clean all of the analog board on the underside of the scope. I'm hoping they survive dunking in acetic acid, simple green, etc.
Sorry for the 8 year lag.