Thank you for that. Unfortunately, yes it doesn't have schematics.I couldn't seem to find the actual schematics here, but the service manual will still be a good thing to have:
I can honestly say I don't think I've ever heard of SMD caps going bad. Make sure there's not something else that caused them to fail, otherwise you'll have to do this all over again at some point in the futureProblem solved.
The A6 (CPU), A10 (synthesizer), A21 (channel 1), and A31 (channel 2) boards had bad caps. A total of 12 were changed out. And 8 PCB traces repaired from electrolyte corrosion.
End results, AWG2020 passes self tests, calibrates, and functions correctly.
If you get the "Illegal Configuration" type of error, it means that the A21 and A10 boards likely have bad capacitors also.
Caps were all SMD 22uf@35V EMVY350ADA220MF55G
I'm talking about SMD electrolytic capacitors. They fail all the time in older electronics. They vent their electrolyte and it causes corrosion.I can honestly say I don't think I've ever heard of SMD caps going bad. Make sure there's not something else that caused them to fail, otherwise you'll have to do this all over again at some point in the future
Woops, was thinking of the flat chip capacitors. SMD Electrolytics makes a lot more senseI'm talking about SMD electrolytic capacitors. They fail all the time in older electronics. They vent their electrolyte and it causes corrosion.
I've seen it commonly in older computers.
That's actually being very generous. I tend to have problems with them after only 5-10 yearsI agree with you, those types of caps fail because of other problems. But electrolytics are a mess after 15-20 years or so.
No documentation. Just a powerful magnifier, continuity checks to find the bad traces, and time... Lots of time.That's actually being very generous. I tend to have problems with them after only 5-10 years
Anyway, I'm glad to hear you got it fixed! Did you just guess on where the traces were supposed to go, or did you find documentation? I recently repaired a HP1741A Scope that stopped working because a through-hole electrolytic exploded and corroded the traces. I had to follow the traces to figure out where they were supposed to go before repairing them.
Thanks! Yes, getting through the first error message was quite a relief (especially since it was not a documented error type). I enjoyed the process of reviving it.Well nicely done! It's always a great feeling when you're able to repair something like that.
Keep up the good work!
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