Stavanger
Quoted from nexfx:I came to this thread today with the same precise issue as Kraab, if you do have more info on that service bulletin and switch you are talking about you would be helping two people at the same time!
This is the service bulletin : https://arcarc.xmission.com/Pinball/Stern%20Service%20Bulletins/sb/sb54.pdf
It applies to flipper card(s) with model number 520-5033-03.
If you have flipper card(s) with model number 520-5076-00 you do not need to do the modifications in this service bulletin as they are already incorporated on the board.
The fix is for failing EOS switches (not flipper buttons) and makes the flippers behave even if the EOS are failing.
It is not always apparent if the EOS switches are failing or not - they may measure OK but still somehow not work properly so the older model flipper card doesn't work.
Attached is a photo I did on a card fitted in a Jurassic park.
PS. I have had the same problem occur on a Rottendog flipper card but have not tried this modification on that - not sure if it would work either as the design and components are a bit different.
St. Augustine, FL
