https://pinballnovice.blogspot.com/2026/03/scan-sega-price-list-1974-01.html
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Today we've been working on the score reels, they were initially disassembled and put back together, but they still needed some switch adjustments and love.
Seeing an EM game giving score from a fast moving spinner is such a satisfying thing to look at. We found ourselves shooting at the 100pts spinner just for the fun of it.
Technically, a lot of stuff goes on in the background. Every playfield switch of the same value are connected to a specific relay, which are 100, 1000 and 10000pts in this game. The energised relay then goes through a player unit, which selects whose score reels we're advancing. Ultimately it makes the tiny coil pull inside the score reel. The coil there has a switch that tells the relay that the score is now awarded and the relay can let go.
Why the relay? The score reels need relatively clean pulse to advance. A bad or too brief switch contact could leave the score reel's coil half-way and thus not advancing the reel. The relay again is easily tripped and it guarantees the score reel advances one step. There's also satisfying sparks when all this happens!