(Topic ID: 288869)
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Williams, 1966
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Springfield, MA
Quoted from curtisdehaven:I see on the schematic that a "coin relay" is also a potential path for the advance relay. What is that and where is it? Coin, like money? For what it's worth, this machine has been rigged not to use coins...
If you look at the snippet I posted you'll see the Coin relay at the beginning of the circuit. It likely gets its name because it processes 'coins'/credits.
Capture1 (resized).PNG
But in looking back at that I see that the Make/Break switch on the Coin relay could be causing your problem. Check that it is working correctly by manually activating the plastic armature and ensuring that contact is solid on both sides.
Quoted from curtisdehaven:Also... I see that the big master reset is also activating when it fails - as if it's a new game, not just advancing during a game.
Note the Advance relay switch right in the middle. Check that is clean and properly gapped.
Capture (resized).PNGQuoted from curtisdehaven:So, where is the coin relay on the machine? And what is the plastic armature?
It's the last one on the bottom of the cabinet before the Jones plugs and that M/B sw. will be closest to the front. And the white plastic part in this pic is the armature. Here is a superb site on all phases of EMs, for newbs and experienced folks alike: http://www.pinrepair.com/em/index1
p1999659955-4 (resized).jpgQuoted from dr_nybble:Could be that the 5A switch was not open long enough for the self-hold switch to fully disengage.
You may have to adjust the gap.
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