4 Square
Gottlieb, 1971You're currently viewing posts by Pinsider QuietEarp.
Click here to go back to viewing the entire thread.
Hi,
I have brought a 4 Square back to life after decades of storage and neglect. I had it playing fine for a 2 weeks, but today the Alternating Relay was locked on. Hitting the pop bumpers and slings did not turn it off though they scored as normal (one point) Examining the schematics suggests that the issue may be in the "0-9" Unit which I am not familiar with. I assume it is on the ones score reel. Examining that reel yielded no obvious issue. Any tips to get this issue sorted out?
Thanks, you are right. It is the stepper in the backbox. Coil is firing, but the armature is not engaging the teeth on the wheel there. When I manually move it it works fine. I remember this armature barely engaging when I was cleaning the unit. I took it apart and added a washer to make the engagement happen. Now I have Alternating Relay! Thanks again.
You're currently viewing posts by Pinsider QuietEarp.
Click here to go back to viewing the entire thread.
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/help-with-alternating-unit-on-4-square?tu=QuietEarp 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.
Stroudsburg, PA