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Main => Main Forum => Topic started by: xonix_digital on May 01, 2005, 02:04:27 pm

Title: Power supply problems...
Post by: xonix_digital on May 01, 2005, 02:04:27 pm

Hey all,
I have an old Galaxian machine turned Galaga. I need to get the voltage on the outputs to +12 and +5 or something like that. I have a multimeter but I don't know where to test. There is a little red knob that has an arrow pointing left and a big "H".
Any help with how to make sure I have the power set right would be awesome!
Thanks in advance. ???

Title: Re: Power supply problems...
Post by: xonix_digital on May 17, 2005, 01:29:48 pm

 ??? Power supply n00b still needs help... thnx =)


- XD

Title: Re: Power supply problems...
Post by: RayB on May 17, 2005, 02:02:30 pm

**DISCLAIMER**I am not responsible for any problems as a result of this advice**

What you do is you put your multimeter Ground lead to the Ground of the power supply. And the Power measuring lead to the power terminal you want to measure. They should all be labelled.

The next thing is the power has to be on. (duh)

Also, you will get readings of Zero if there is no load (a "load" means that there has to be some electronics hooked up, drawing power. In this case, your game board.)

So that's it. If you have already messed with the red knob, then turn it down (H I think == "high", so turn in opposite direction). Test the power. Then turn it up slightly. Test again. Etc, until it reads around 5.0.

Thing is, you probably will have to shut down and power on each time you change the voltage, to see if your game board boots up. Some boards will work right with a +5 as low as 4.7. Whereas some will NOT work until they get as much as 5.2.

Title: Re: Power supply problems...
Post by: xonix_digital on May 17, 2005, 02:36:10 pm

thank you so much... I will try this. If anyone else knows something I don't please feel free to input.

- XD

Title: Re: Power supply problems...
Post by: Ken Layton on May 17, 2005, 05:59:56 pm

Turning the adjustment on the power supply toward the "H" increases the voltage output on the +5 volt line. The other voltages are tied to that adjustment and increase proportionately with it (it's made that way).

Title: Re: Power supply problems...
Post by: xonix_digital on May 17, 2005, 09:33:17 pm

so I am guessing that if I get the 5v right then the rest will be ok?


- XD

Title: Re: Power supply problems...
Post by: paigeoliver on May 17, 2005, 09:52:42 pm

Quote from: xonix_digital on May 17, 2005, 09:33:17 pm

so I am guessing that if I get the 5v right then the rest will be ok?


- XD

As long as your power supply itself is OK and big enough to power the game itself (12volt stuff is NOT nearly as voltage sensitive as 5 volt stuff).

Title: Re: Power supply problems...
Post by: xonix_digital on May 20, 2005, 11:23:17 am

Thanks guys!!! Yoiu really helped a lot!  :o