(Topic ID: 119941)

power supply issue ?


By steamfitter

4 years ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 4 years ago by Lindsey
  • No one calls this topic a favorite

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#1 4 years ago

Help needed . Just bought a bally future spa the led on the mpu stays on solid green . I checked tp 1,3,5 and 7 on mpu board all within 10% . Power supply tp 1 should be 5.4 mine 7.7 , tp 2 230 mine 238 , tp 3 11.9 mine 13.1 , tp 4 7.3 mine 6.6 and tp 5 is OK . Tp 1 and 3 are more than 10% of what they should be would that affect boot up ? I was told the mpu board had recently been repaired . I'm still a beginner repairing ss , I need a little guidance .

#2 4 years ago

You mentioned that you checked TP 1,3, and 5 on the MPU? You should check test points 2 and 5. TP5 will be for the +5VDC and TP2 for the +12VDC. TP4 is ground. If there is no 12V for some reason, the MPU won't boot because the reset circuit won't work.

If those voltages are good, this is a good opportunity for you to get a bench power supply and test the MPU on the bench. A simple PC power supply will suffice.

Should be info on PinWiki regarding MPU troubeshooting and repair and the old pinrepair.com info is great if you can find it.

http://www.pinwiki.com/wiki/index.php?title=Bally/Stern

If you have specific questions during the troubleshooting which are not covered in either of those places, post them here.

#3 4 years ago

I was checking my ic`s and found one with a broken pin , little bit of solder problem fixed . Going to order ic kit and all new connectors .tks for the reply Lindsay .

#4 4 years ago
Quoted from steamfitter:

I was checking my ic`s and found one with a broken pin , little bit of solder problem fixed . Going to order ic kit and all new connectors .tks for the reply Lindsay .

Nice work!

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