Hi all,
I have an issue with my mini playfield motor, very likely due to the 2 Opto switches located underneath or something connecting them. I saw some people asking for similar issues but no clear answer, so why I am posting here.
The symptoms are the following:
- My kicker is slow going left, while it's fast going right.
- There is no mechanical issue on the motor, gearbox, sprocket, etc...
- All the opto switches pass the standalone tests alright
- On the Mini playfield test I can see the left opto switch opens and closes when the motor runs towards left, so the cause of the motor running/stoping/running/stoping... ultimately slowing down in that direction until the left limit is reached.
- On the same test the right opto behaves correctly and the motors goes straight to the right limit.
- I changed the left opto and diode on the left board, but the problem persists
I swapped the left and right opto boards and the same problem happens now on the right side with different symptom
The new symptom :
- The new sympton is the motor grinding towards the left at pinball start-up, and until I switch off the machine
- By closing the right opto with a piece of tape, I can startup without this grinding to reach the mini playfield test menu
- The minplayfiled test menu now reports an error
- by removing the tape I can activate the motor and now the right opto switch opens and closes when the motor is activating
I have swapped back the right and left opto boards and the symptoms are back to the same than at start, totally replicable.
It feels like both the old and new optos were out of spec, but the probality is low, and I am suspecting something deeper on the "10 opto board" located near the left flipper or on the 12v supply...
Have any one encounter that problem ? Do you have an idea of what could be the root cause ?
Thanks for any help!