Need help, power issue?

Dantebean

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I meter'd my volts at 2 points. Just at the line in it measures 120v, but at the 115v at the transformer I'm only getting 64v. Is it split? I am only getting 64v at my switcher and its not powering my board, switcher led (is off), or my monitor.

I bought a new MCR adapter for my Tron but isn't working I think due to my low volts into the transformer. Any suggestions? Fuses are checked and working fine.

ImageUploadedByTapatalk1357860160.442886.jpgImageUploadedByTapatalk1357860168.827674.jpg
 
Are you feeding the jamma power supply from the isolation transformer? If so you don't need to. You can drive it by the same 120v that feeds the transformer.
 
Only 1 meter lead is seen in those photos. Where is the other lead??

Also, your meter is set to measure DC (direct current). You need it set to AC (alternating current). 3 clicks clockwise.
 
On a ground bolt.

That's not how to measure AC voltage. AC requires you put one lead on each "leg" of the AC. So one probe on each of the two AC screws on the switcher (the other is just to the left of the one you're probing in the photo).
 
I am getting 64v from the transformer to the white and black wires. I am powering my switcher from those same white and black wires that power the monitor.
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That's not how to measure AC voltage. AC requires you put one lead on each "leg" of the AC. So one probe on each of the two AC screws on the switcher (the other is just to the left of the one you're probing in the photo).

Ok, I am now at these settings and this reading of 126v. My switcher light isn't on and my pcb led isn't on.
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So the LED on the switcher isn't on. Two posibilities: (1) the switcher isn't working, or (2) the LED is dead.

Easy to find out which. Change the meter back to DC volts, put the black lead on the GND terminal of the switcher, and the red on +5VDC terminal. Is there a reading close to 5V?

If there's an output from the switcher, then the LED is just out.

If there's no output, try pulling the switcher, opening it up, and looking for a fuse.
 
So the LED on the switcher isn't on. Two posibilities: (1) the switcher isn't working, or (2) the LED is dead.

Easy to find out which. Change the meter back to DC volts, put the black lead on the GND terminal of the switcher, and the red on +5VDC terminal. Is there a reading close to 5V?

If there's an output from the switcher, then the LED is just out.

If there's no output, try pulling the switcher, opening it up, and looking for a fuse.

No voltage on the +5 with my multi on this dial.
ImageUploadedByTapatalk1357863717.373706.jpg

Opened up the switcher and fuse is good.

When I turn on and off the power the led flickers a little on the switcher.
 
OK. Disconnect all of the outputs from the switcher (everything but the AC wires). Take pics or notes so you can be sure to re-connect it correctly. Then try powering it on and measuring the outputs. It's possible that there's a short somewhere, and the switcher is shutting itself down. If it powers on fine w/o any load connected, there's an issue outside of the switcher. If it still doesn't do anything with nothing connected (but the AC in), then there's an issue inside of the switcher.
 
OK. Disconnect all of the outputs from the switcher (everything but the AC wires). Take pics or notes so you can be sure to re-connect it correctly. Then try powering it on and measuring the outputs. It's possible that there's a short somewhere, and the switcher is shutting itself down. If it powers on fine w/o any load connected, there's an issue outside of the switcher. If it still doesn't do anything with nothing connected (but the AC in), then there's an issue inside of the switcher.

Ok, I disconnected the MCR adapter and the switcher works and is putting out 5.06 now. So I will double check my plug ins to the MRC and see what's going on.
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it also apears that he has the power supply wired in on the output side the iso for the monitor.

this needs to b changed as well only the monitor should be on the output side of the iso.

Peace
Buffett
 
it also apears that he has the power supply wired in on the output side the iso for the monitor.

this needs to b changed as well only the monitor should be on the output side of the iso.

Peace
Buffett

Per videos I have seen and the instructions of the MRC I am to wire it on the monitor power input by the quick disconnect. This is Wrong?
ImageUploadedByTapatalk1357867226.093439.jpg
 
It looks to be wired correctly via the instructions that are included from AS.. Some say its a good idea to grab the 120 before the ISO, but that's not your real issue.. Seems like your switcher is DOA or something isn't wired correctly.

Have another switcher you can try?
 
It looks to be wired correctly via the instructions that are included from AS.. Some say its a good idea to grab the 120 before the ISO, but that's not your real issue.. Seems like your switcher is DOA or something isn't wired correctly.

Have another switcher you can try?

I will try another switcher. This switcher does work until I plug in the MCR adapter.
 
ImageUploadedByTapatalk1357867763.229315.jpg
Bottom right solder point is laping into the trace above. That the issue? (This is from the MCR board.)
 
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