Arcade machines (especially newer ones) may have a different type of 3-wire coin “comparator” mech, similar to these:

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Arcades using this style of coin mech need slightly different wiring, but are still easy to hook up.

Use the following wiring:

Arcade cable side Rfpay cable side
pin 1: 12v DC (typically red) Red connector (HT)
pin 2: COIN SIGNAL (typically white) Blue* connector (COIN A)
pin 3: GND (typically black) Black connector (GND),
white connector (COIN B)
[connect both together]
pin 4: [not connected]

(*Rfpay arcade harness cables sometimes use Green wire instead of Blue, they’re electrically the same.)

Wiring Diagram

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If you need any help with this just contact us. If you send us pictures / model#s, etc, that is helpful.

<aside> ⚙ See also: RFPay Technical Diagrams for full wiring details.

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<aside> ⚠️ Once you complete the wiring, the game should coin up.

If it’s still not working, try also adjusting the credit pulse timings:

Adjusting Coin/Credit pulse settings

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Tech details deeper dive (optional)