Arkanoid Won't Coin Up

parkway

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I have a "real" Arkanoid board; been in storage for a bit. While testing it out, I cannot get it to coin up; tested the cabinet with another known working Arkanoid and that one coined up fine (so I know it's not a switch/wiring issue). I've looked for schematics and can't find anything. Where should I start in trying to figure out why this thing won't sense a coin drop? Board works fine otherwise.
 
Trace the coin up input from the edge connector . Look for any cuts in the line. If not then replace the first chip that the line goes too ... not 100% sure on arkanoid but good chance it's a 74ls244 or something similar.
 
If someone else has arkanoid schematics they can probably tell you for sure what chip it is.
 
There are no Arkanoid schematics available AFAIK.

EDIT:
I've got an Arkanoid PCB around here somewhere, I'll take a look at it to see where the coin inputs go.

In the mean time, be sure to try both coin inputs, and the "service credit" input (perhaps a service button in the coin door?).
 
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Thanks, guys. There's only one credit input as far as I can tell from the pinouts and that's all I had (pink wire at pin 8/component side). Didn't check the service switch wire; not sure if there's even one there. Service switch didn't do anything though.
 
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OK, I pulled out my Arkanoid PCB. If you're is a legit Taito board, it (like mine) should have a big rectangular PC030 custom hybrid on it. That handles the coin inputs on Taito games of this era. IIRC, this requires 12VDC to work. Is your 12V supply to the board good? Also look at the legs of the PC030, being bent back and forth can cause them to break.

It's kinda hard to follow the traces with the white solder mask, but there may be an IC between the input and the custom. I'll try using the DMM to trace it a little bit...
 
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It's kinda hard to follow the traces with the white solder mask, but there may be an IC between the input and the custom. I'll try using the DMM to trace it a little bit...

Nope, nothing between. I get continuity directly from the edge connector (coin input) to pin 17 of the PC030 hybrid. It goes thru an inductor on its way; so if you don't have continuity, check that inductor.
 
Nope, nothing between. I get continuity directly from the edge connector (coin input) to pin 17 of the PC030 hybrid. It goes thru an inductor on its way; so if you don't have continuity, check that inductor.

Ok thanks. I'll monkey around a little and see what I can find out.
 
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