How many times does it increment the score incorrectly? Probably being pulsed by a score motor switch.
You're currently viewing posts by Pinsider dr_nybble.
Click here to go back to viewing the entire thread.
How many times does it increment the score incorrectly? Probably being pulsed by a score motor switch.
I believe how the reset should work is that the 100K unit does a full reset. This puts it in the reset position. A switch should indicate that. While in this position the 10K unit is pulsed until it advances the 100K unit to the zero position. That completes the score reset sequence. Seems though that your 100K unit is being pulsed by something else too when the score motor runs. You’ll have to go through the schematic and block various switches with fish paper for instance to see what it is.
Since it increments five times you should look at the score motor. Which switch stacks are pulsed five times when the score motor does a rotation? I can't tell from the schematic diagram which cam that is. The top one? You could also close the various score motor switches by hand (push with a chopstick for instance) to see which one increments the 100K unit. It might not be a playfield switch but a relay switch that is closed when it shouldn't be.
You'll need to exhaustively check everything that can energize the 100M Step Up Unit as per your schematic.
- via R4 (then through M1 or M6 on the score motor)
- via R3 (then through M4 on the score motor)
- via R9 and R5
Systematically block these.
You are also to get an increment when the 10M Step Up increments and it is in the 90 position. Try to block that too, maybe that is triggering when it shouldn't.
You're currently viewing posts by Pinsider dr_nybble.
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/reset-wont-zero-out-properly-this-is-an-interesting-one?tu=dr_nybble 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.