(Topic ID: 155427)

Sys11A: U10 PIA Failure

By johnwartjr

8 years ago



Topic Stats

  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 8 years ago by Sheprd
  • No one calls this topic a favorite

You

Linked Games

You're currently viewing posts by Pinsider Sheprd.
Click here to go back to viewing the entire thread.

#6 8 years ago

It could be that the PIA message is a red herring. If the code gets lost due to any error on the address, data, or interrupt lines, it might "fall" back into executing the code to display the error message you are seeing. I would make sure to ohm out ALL of the data, address, and interrupt lines, and then ohm them out to make sure their is not a short between ANY of them... I know, what a pain.

Looking at all the lines with a scope can sometimes show a point where collisions happen if there is a short. Opens are harder to see that way. If someone else worked on the board, my bet would be that there is a hidden open to one of the EPROMS under a socket that is floating.

Mac

Promoted items from the Pinside Marketplace
$ 35.99
Eproms
Matt's Basement Arcade
Eproms
$ 54.99
Cabinet - Shooter Rods
Lighted Pinball Mods
Shooter rods

You're currently viewing posts by Pinsider Sheprd.
Click here to go back to viewing the entire thread.

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/sys11a-u10-pia-failure?tu=Sheprd and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.