CH-923 Manual

ch-923 manual

Click on the picture to zoom in .

Coin mechanism wiring

Take notice the RED wire delivered with the coin mechanism is for 12v. If you use a ATX psu the Yellow wire is for 12v and the red for 5v. I made this mistake when starting right away connecting red to red, duh..it won't harm the JPAC since it only got 5volts.

Speaking of 5v. This is what the JPAC expects, and since the coin mechanism operates on 12v you have to make sure to add a zener 5.1v diode or it will damage the JPAC.

This scheme explains how to connect the wires.
(source: ULTIMARC site)

Pin 1 connects to a 12 volt supply. This can be from a JAMMA power supply or a PC disk drive connector (yellow wire).
Pin 2 connects to the J/I-PAC coin 1 input.
Pin 3 connects to GND on the J/I-PAC

So looks like this

ground - zener 5v1 - coin

ground - zener 5v1 - coin

Next update a copy of the CH-923 manual.

Coinmech

No update on the joystick project, it's still pending

But..
Something that had to be added to the cabinet is a coin mechanism. I ordered the item a year ago on Ebay but stopped trying after spending much hours figuring out on how to get it work.

I had the impression the coin mech was faulty, a KAI-638C. Now a year later ordered a new one and do another attempt and must say that I found some new essential information missed back then that very likely is the cause why it failed.

Here's the coinmech talking about CH-923
The blog will be updated next few days with the progress.