Hey all,
I'm working on recapping a IIGS power supply - Dynacomp - that had pretty much no voltage output. I replaced all the caps on the low voltage side, but at this point though I did not replace the filter caps since they weren't Rifas and looked ok, and I did not have the 100uF main caps. I have since replaced all of that but haven't tested yet because I want to ask about a strange burned trace.
Sidenote I had a dead 100kohm resister I replaced too.
So when I tested it I actually got some life out of it including a whine sound (yeah, I tested it on the machine against my better judgement but I didn't have anything to put a load on it) and then it died along with a strange smell. I thought it might be those filter caps starting to give out. The smell was hard to tell but it could have been the transformer as it was in that area but also near the filter caps too.
While I was replacing the filter caps, I noticed the burnt trace. Which is near the transformer. See pic - this was after I cleaned the burned mask off. It has continuity still.
Any idea what could have caused that? I'm a little nervous to plug it in and test it again with the new filter caps after seeing it.
Thanks!
I'm working on recapping a IIGS power supply - Dynacomp - that had pretty much no voltage output. I replaced all the caps on the low voltage side, but at this point though I did not replace the filter caps since they weren't Rifas and looked ok, and I did not have the 100uF main caps. I have since replaced all of that but haven't tested yet because I want to ask about a strange burned trace.
Sidenote I had a dead 100kohm resister I replaced too.
So when I tested it I actually got some life out of it including a whine sound (yeah, I tested it on the machine against my better judgement but I didn't have anything to put a load on it) and then it died along with a strange smell. I thought it might be those filter caps starting to give out. The smell was hard to tell but it could have been the transformer as it was in that area but also near the filter caps too.
While I was replacing the filter caps, I noticed the burnt trace. Which is near the transformer. See pic - this was after I cleaned the burned mask off. It has continuity still.
Any idea what could have caused that? I'm a little nervous to plug it in and test it again with the new filter caps after seeing it.
Thanks!