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Power & Energy
Forum Need to get MG Electronics Power Supply repaired...or NOT!?
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Related

Need to get MG Electronics Power Supply repaired...or NOT!?

Former Member
Former Member over 10 years ago

Hi.

I just bought a lot of Slot Car stuff, yes those cars that go around a track. The guy was serious about his hobby he didn't have the usual wall plug in power pack, he used a MG Electronics PS-10AD, 0-20 VDC at 10 Amps. Well this power supply doesn't work anymore. It does turn on and the red overload light stays on. It doesn't put out anything. I used my multimeter etc., nothing. I know that these are made overseas . They did retail for about $200. So the questions is were can I get it repaired OR should I ? I'm in Western MAss.

I did check the fuse , it's fine. I've got a heavy door stop on my hands, it does have a nice handle and cord on it !

Many thanks for info, Ted

 

http://www.mgelectronics.com/shopexd.asp?id=179

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Top Replies

  • mpulliam
    mpulliam over 4 years ago in reply to jw0752 +4 suggested
    Well, I spent all day replacing four 2N3055 transistors....it wasn't easy and... Success!!!
  • mpulliam
    mpulliam over 5 years ago in reply to jw0752 +3
    Hi John, I have a thought. If the output transistors (or is it pass or power transistors?) NTE130 or 2N3055H are giving a bad voltage reading in the voltage test, could it be that any component between…
  • mpulliam
    mpulliam over 4 years ago in reply to mpulliam +3 suggested
    BTW I tested the old 2N3055 transistors, the continuity is the same as a new 2N3055 . There is no continuity between any of the terminals But when I run a diode test, a new 2N3055 tests at .486 volts with…
Parents
  • jw0752
    0 jw0752 over 10 years ago

    I was questioning whether problems with the outputs would trigger the overload circuit. My first simple check would be to use my ohm meter to look back into the output of the power supply to see if there is a short. Make sure the positive probe is on the positive terminal and the negative probe is on the negative. This could be as simple as a shorted filter cap.

    John

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  • jw0752
    0 jw0752 over 10 years ago

    I was questioning whether problems with the outputs would trigger the overload circuit. My first simple check would be to use my ohm meter to look back into the output of the power supply to see if there is a short. Make sure the positive probe is on the positive terminal and the negative probe is on the negative. This could be as simple as a shorted filter cap.

    John

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