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One button registering as a press when released


2playornot

Question

Hi AAF,

 

I have a challenger cabinet which I've connected to a JPAC.

 

I have an issue with button 6 (Heavy kick) on the player 2 side.

 

In the image below, I've wired a daisy chained ground from button 4 (Light kick) closest to the joystick, to the button 6 (Heavy kick) then to the ground on the JPAC for player 2 as well as wiring the 4,5 and 6 buttons. The ground on button 4 is not connected to anything. Buttons 4 and 5 work when pressed, however button 6 only activates after the button is released after each press. As a test, I replaced the microswitch for button 6 (white switch in the picture) but this did not change anything.

 

Player2 Kick Switches.jpg

 

Buttons 4, 5 and 6 on player 1 have been wired in the same way and work when pressed immediately. I'm unsure why only button 6 on player two side is activating after being released.

 

Could someone please assist? Please advise if you need any other information.

 

JPAC Wiring.jpg

 

Thanks,

 

2playornot

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6 answers to this question

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Does it do this in notepad? That would exclude some weird mame setting.

 

Is it a jpac setting? Tried chucking it under a different button? Say switch 7 or 8 or even on the other side, doesn't matter.

 

You have already taken the switch and wiring out the options by the sounds of it.

 

Sent from my D6653 using Tapatalk

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Hi Redferatu,

 

Thank you for the suggestions. It did do the same in notepad. There is some sort of issue with player 2 button 6 on the jpac. Moving button 6 to button 8 solved the issue.

 

Thank you for your help.

 

Regards,

 

2playornot

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Hey Rustler77,

 

I can barely recall now. It may have been what David_AVD advised.

 

If I remember correctly, the microswitch had the reverse labeling for the NC and NO positions for some reason; this appeared to be a fabrication error on the part of the microswitch. I think once I swapped the connector from the top position of the white microswitch in my image above to the lower position, things started working again as normal.

 

As I can't really recall if this is how I fixed it, this may be worth a try as it won't be much effort on your part to test and may solve your issue.

 

2playornot

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