(Topic ID: 309300)
Linked Games
"300"
Gottlieb, 1975
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Is the U relay pulled in at the time you see the add coin pulse? U should be pulled in: 1) At power up, and 2) After P1 points are scored. In both cases, the M/B switch on the U relay's job is to block "coin up" pulses.
From your video, it looks like both the reset and add coin unit relays are actuated at the same time - that should never happen, it is controlled by that U M/B switch. One or the other should fire. Check that switch out...
"Mystery Score" is on a few games that I know of - "300", Top Score and [Super] Soccer... but those Delay Modules (2 different ones were produced) are used elsewhere for some feature control and randomness - Flip A Card, ... there are a few others listed in this thread:
https://pinside.com/pinball/forum/topic/a-capacitor-diode-and-resistor-walk-into-a-bar
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