midway power supply question

Mizzou

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Ok, so after dealing with my spy hunter power supply, I remembered that tron uses the same one. I thought about switching out the power supply in spy hunter with the one in tron and see what happens. I figured I would check the voltage in tron first just to see what my starting point would be with the votage. I was running at around 3.5...I tried turning it up and it actually went down, to about 2.5. Tried turning it the other way and the voltage wouldnt budge. I've moved the pot to the max in both directions and it still holds steady at around 2.5..So something has to be wrong.... Any suggestions?
 
nope, not the meter. Put new batteries in it and tested it on other machines..works fine..
 
Then the power supply is bad in some way. Start by looking at the rectifiers and verify they are working correctly with the diode test. Make certain the pots are working correctly with the ohms meter and you should see them adjust, be sure to test both sides to the center pin on the pot. I believe that also has a 1amp regulator also and verify the voltage in and out of that.

how to test a bridge rectifier....

http://www.youtube.com/watch?v=11JPy4t36oo

As for the regulator I just carefully measure the input and out put and kind of get an idea from that where the problem is. It is common for the switchers to have a bad input to the regulators so it may look like the regulator is bad when it is the input that is the culprit.

EDIT:

Post a pic of the patient so I know exactly what it is we are working on.
 
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