John, Thanks for your reply. I have revisited this juke 2X. The main problem was I thought I remembered Ron's instructions. Rereading it he says adj "limit sw 179" & i had adj both back switches for carryover. I bought a new detent sw & bracket on epay and adj detent sw. So it is working better, but occasionally it will miss a selection by 1. {select 140 and plays 139}. Running Ron's test mode #1 [detent on/off: i get 19 50, Ron's example is 29 44. Running test #2 [detent to limit sw], I get 00 00, Ron,s example 22 22. Do I need to readj per detent sw procedure or ? Kent ________________________________ From: John Robertson via Jukebox-list jukebox-list@lists.netlojix.com Sent: Thursday, October 2, 2025 2:39 AM To: Kent Z via Jukebox-list jukebox-list@lists.netlojix.com Cc: John Robertson jrr@flippers.com Subject: [Jukebox-list] Re: SMC2 mech problem/ Ron Rich Gen2 MPU
On 2025-10-01 8:29 p.m., Kent Z via Jukebox-list wrote:
My sons SMC2 was recently moved. It has Ron's GEN2 mpu. I have RTFM and Ron was adamant about making sure the carry over switches are open and never close on the 2 Limit switches that control the reversing the mech at end of travel L/R. or the mech will have motor run on and the mech runs past the ramps and crashes at the ends. This 1 does that and I made sure they r open. I found they must have tie wrapped the mech for travel in the Detent sw area and it was bent and not functioning. I bent the bracket back and I can see the sw open & closing. If I run Ron's test #1, it does not show the pulse timing . Instead it just shows mech position , like 135, etc. Is the timing of the detent sw critical that would cause this not to work? Any ideas to try? Thx, Kent
You need to verify with an ohmmeter (machine power off, rotate turntable by hand to move mech) that the switch is actually closing and opening as per the adjustment specifications. A visual check won't show where the keeper blade is shorting the moving blade unless you know exactly what you are looking for. I've seen hundreds so I know what a bad one looks like.
John :-#)#
-- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
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