Bingo games require too much thinging.

That's a cheap hack to prevent the score extra step relay from firing. Bend 'em back and you're good to go (after some light cleaning). I use a piece of twine to floss those grooves, and lightly scrub the fingers with alcohol on a green scotch brite.

just to be pedantic

those two slip ring wipers connect the score extra step pulse switch 4A - the little guy with the roller on the end between the two metal cams at schem F28 - to the rest of the game.

as bpc said, with those slip ring wipers bent up, you don't get scores jumping more than one level per cycle. The cams are doing their thing, and the roller may be going over the bumps to make switch closures, but it doesn't help if the switch is not connected to the circuit.

bending up the slip ring wipers or misadjusting open a score extra step relay switch is the easiest way to disable score extra step functionality.

Here's a link to the score extra step patent. Everything you ever needed to know.

http://pdfpiw.uspto.gov/.piw?Docid=02601524&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D2,601,524.PN.%2526OS%3DPN%2F2,601,524%2526RS%3DPN%2F2,601,524&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page

Score Extra Step Patent.pdf