Hello,
Yet another repair on top of all the others I have to finish.
Here's my problem. I got this nice chart recorder the other day. Unfortunately it didn't come with the power supply or anything else. The first thing I did was oil the rails and take it apart. I traced the power supply input jack all tha way back to a diode package. I assumed that the power input must be AC at around 10-20RMS. I couldn't find any schematics of the unit online so I had to assume. To make a long story short I left it on for about 30 seconds without a problem, when I reached over to turn on the function generator it went pop, flash of light and the magic smoke came out.
What could have caused this? Bad capacitors? The other capacitors look sketchy. Also what is the name of the blown semiconductor.
Thanks!