Galaxy
Stern Electronics, 1980I am fairly sure it can be traced back to the Lamp Driver Board (LDA 100 rev. 2). According to the manual, it is connected to pin 24 in the J1 section. However, which transistor or other components does it pass through? I just want to replace them to see if that resolves it. And yes, before you ask I tried replacing the bulb on it. 
Here is the manual I referenced: https://www.ipdb.org/files/980/Stern_1980_Galaxy_Manual.pdf
Thank you!
Quoted from TanRuNomad:I am fairly sure it can be traced back to the Lamp Driver Board (LDA 100 rev. 2). According to the manual, it is connected to pin 24 in the J1 section. However, which transistor or other components does it pass through? I just want to replace them to see if that resolves it. And yes, before you ask I tried replacing the bulb on it.
Here is the manual I referenced: https://www.ipdb.org/files/980/Stern_1980_Galaxy_Manual.pdf
Thank you!
3C24F36A-9965-4029-B0C1-A4B26A3D9DED (resized).pngQuoted from TanRuNomad:Quick answer and a good resource to hold onto.
Lest ye grabbed only the posted screenshot as your resource: https://www.pinwiki.com/wiki/index.php?title=Bally/Stern#Lamp_Driver_Board_SCR_.2F_Connection_Chart
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/stern-galaxy-extra-ball-light-is-always-on 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.
San Diego, CA