Judge Dredd
Bally, 1993VUK's both fire repeatedly about 6 times when machine turns on then they stop. During that time the flippers do not work. Once that stops game will start but starts firing balls without stopping. No power to planet motor or LED strips I added. Replaced some blown fuses, no blown fuses now but LED7 on power board not lighting. I'm thinking it's a circuit board issue since LED7 is not lighting and no fuses are blowing, any other ideas? Thanks a lot!
Rich
It looks like your unregulated 12VDC has crapped out.
That power is used for motors and for the optos, which is why your VUKs fire at power on. The game thinks there is a ball in the VUK.
That power is fused by F116. Physically pull that fuse and "buzz" it with your DMM.
If it's good, the options aren't many after that.
Unregulated 12VDC is created by BR5 and smoothed by C30.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info
Wanna join the discussion? Please sign in to reply to this topic.
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/jd-motors-not-working-led7-not-lighting-on-pcb 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.
Denver, CO