Author Topic: Medieval Madness service buttons inside coin door not responding  (Read 556 times)

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Offline Strangeways

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Let's keep this civil people and get back to the issue at hand. Andrej has a technical issue that we need to resolve together. Keep the personal stuff off the topic, and if it progresses we will remove the negative comments - ok  %$%

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I don't have a WPC95 at hand,  but I have a schematic of an NBA Fastbreak that I will try to help out with. Have the machine switched off for these tests.

All the door switches are Dedicated ground switches that pass throught the Coin door interface board. They all return to the CPU board via the J205 connector. These IDC connectors are notorious for bad connections. I would remove J205 (CPU board) and look at the connector to ascertain that no wires are loose. Refit J205 and on the coin interface board, reseat J1 and J3. 240 Amusements are referring to a GREEN grounding wire that is connected on the door and is screwed into the cabinet, usually near the leg bolt plate. This HAS to be a good connection. Check the continuity with a multi meter.

Those loose wires are for the coin swithes. As mentioned, either wrap them with electrical tape (not good if the are earthing against the door), or cut the ends off so there is no exposed wire.

On the switche buttons themselves, there's a black wire that is common to all buttons. If there is a break in this wire to pin 3 of the front door connector, then this will be a problem. The path MAY be broken by those coin door wires. To one coin switch, there will be one black wire and the second (on the right) will be TWO black wires joined. Looking at the loose wires, I'd be checking that.

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