USP-11-150X Power Supply help / advice in a 6in1 switcher

WiiKnee

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USP-11-150X Power Supply help / advice in a 6in1 switcher

Hello, all!

I recently purchased a Raiden II DX stand-up that works real nice-like. I have good, clean 5v/12v power coming from the Peter Chou PS and with the original Raiden board (or any other directly connected JAMMA board) it works great. So, I recently purchased a 6in1 JAMMA switcher so I could run any of several boards conveniently. After spending considerable time setting everything up, it turns out the 6in1 will not work. When I test the board in circuit, I am only getting about 2vdc on the 5 and 12 VDC circuits. Upon looking further into the power supply schematics, it turns out that in order to get the 5vdc rail operating properly, you must draw a minimum of 1.5 amps. By default, the switcher has no jamma boards slots activate on power-up, so it is not pulling the amperage required for proper 5vdc operation. A real bummer.

As a note; I have tested the 6in1 on my test bed with a clean 5 and 12 volt line running into it and it works just fine and is able to switch between all slots remotely.

Has anyone experienced this and have a proper or suggested work-around? My best guess would be to add an additional standard 15amp switching arcade power supply and tap it into the AC line going to the monitor (from the Peter Chou power supply) then run the 12 and 5 vdc circuits from the new power supply into my jamma harness. Is this a feasible solution?

Thanks in advance for any advice!

-Chuck
 
Get four bayonet lamp sockets and wire them in parallel with ground and +5 volts. Now put in four # 44 miniature lamps into the sockets. That will give the power supply the minimum load it needs to startup properly.
 
Get four bayonet lamp sockets and wire them in parallel with ground and +5 volts. Now put in four # 44 miniature lamps into the sockets. That will give the power supply the minimum load it needs to startup properly.

huh, yeah - that is a great idea! I'll have to scrounge around my spare parts and see what I can come up with. Thanks, Ken!
 
Get four bayonet lamp sockets and wire them in parallel with ground and +5 volts. Now put in four # 44 miniature lamps into the sockets. That will give the power supply the minimum load it needs to startup properly.

Just an update - Ken's idea worked great and the 5v circuit activates flawlessly every time, now (thanks, Ken). I imagine this situation will come up again, so just wanted to post for closure.
 
I've had to do that with some multi-game boards. Generally, four bulbs usually provide enough of a load to reliably start the power supply.
 
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