Black Hole
Gottlieb, 1981Hi all, I have a strange problem I'm trying to figure out. I have one single playfield light that is dim, all other lights are good and bright. It's part of the yellow target bank on the bottom of the right side of the playfield and it's the top one in the bank of 4. Voltage is low @ 5.3V and the other lights in the same series are around 6.9V. I tried a new socket and that didn't change anything. Any ideas on where to go with this one? Thanks
I measured voltage from the ground strap to the leg of the lamp socket. Same process for all four lamps in this section.
Quoted from Cherga:I measured voltage from the ground strap to the leg of the lamp socket. Same process for all four lamps in this section.
And even through they should all be connected directly together, you get a different voltage?
Three of the four have the same voltage. The dim lamp is the only different voltage. They all share the same ground strap but each appear to have their own individual power wires and don’t appear tied together at the lamps... unless they are on the other end.
Quoted from Cherga:Three of the four have the same voltage. The dim lamp is the only different voltage. They all share the same ground strap but each appear to have their own individual power wires and don’t appear tied together at the lamps... unless they are on the other end.
It's not a ground strap, that strap is what carries the 6v. The board grounds them individually.
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/black-hole-one-dim-playfield-lamp 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.
Hopkins, MN