(Topic ID: 164979)

System 80B won't boot - boots! No GI & can't start a game

By Topher5000

7 years ago


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#35 7 years ago
Quoted from Topher5000:

Here are pics of the rectifiers. Please be kind about my crappy soldering job.

Just looks like you need more heat. Those blobs should have melted over the tabs and coated them. Those really large metal tabs need a heavy amount of heat to flow the solder well, but not so long that the rectifier melts. If you can adjust the temp on your station, crank it up for those larger lugs.

#37 7 years ago
Quoted from Topher5000:

Will do thedefog, thanks.
My neighbor who was looking at the transformer panel when I moved the wires told me he saw arcing, so that probably pooched at least one rectifier. I read Terryb's electronics tutorial about testing rectifiers so I'll check them tonight & replace as necessary.

No prob. Good luck with the repair.

#39 7 years ago

Just follow the direction of the arrows/triangles. The red probe is your starting point on your meter, and it ends on your black probe. So for diode testing (which is all a bridge rectifier is, just 4 diodes) all of the arrows/triangles should only flow in one direction from one point to the next, red to black. If you reverse the test leads, black to red, you should get no reading on your meter (when in diode test mode).

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