TMNT problem

khanley

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Hi, I just got a TMNT cabinet in today from someone on craigslist. I've worked on a few machines before, but I'm no expert by any means.

When I fired the cabinet up today, everything worked fine. The marquee light comes up, the game comes on, the attract music starts and it's wonderful. The only problem is that when I tried putting quarters in, nothing happened. I couldn't get any credits to register.

So I took off the back door and started poking around, and the first thing I decided to do was push the test switch. When I pushed it, the machine immediately shut off. Now when I press the switch everything comes on, but only when I hold the test switch in. If I let go, everything shuts off.

I thought maybe I blew a fuse or something, but everything seems to be in order. Any ideas on what I did, and maybe how to resolve the issue?

Thanks a bunch,

-Kevin
 
Test switch?

Sounds more like a power interlock switch.
 
Okay, pretend i didn't post this. All I had to do was pull instead of push. :)

As channelmaniac said, it sounds like you are messing with the safety interlock switch and not the test switch. As you've discovered you can pull the switch out and it will lock into place which is very handy when the back door is off. Normally when the back door is on it pushes the switch in and if someone removes the back door with the game still turned on, it will cut the power so they don't hurt themselves.
 
Okay, pretend i didn't post this. All I had to do was pull instead of push. :)

Silly K-han.

You still having issues w/ credits registering? If so I would start by just tracing the 2 coin wires and the ground wires back to the jamma harness to make sure they haven't come loose/broken anywhere along the way. Do the coin switches register credits if you push them manually but maybe the coin just isn't hitting it right? I dunno... you know what you're doing so I'm just throwing ideas out there.
 
As channelmaniac said, it sounds like you are messing with the safety interlock switch and not the test switch. As you've discovered you can pull the switch out and it will lock into place which is very handy when the back door is off. Normally when the back door is on it pushes the switch in and if someone removes the back door with the game still turned on, it will cut the power so they don't hurt themselves.

I hate those Interlock switches. I can understand their worth on location but for me, I tend to forget they are there more often than not... then I spend an hour trying to figure out why the power won't come on when I'm working in the back of the game. I have actually removed all of the interlocks on the back doors of my games... now I use them for test/service switches because some games (i.e. NBA Jam) need you to hold down the switch to stay in service mode so you can just pull out the interlock and it works great.
 
I hate those Interlock switches. I can understand their worth on location but for me, I tend to forget they are there more often than not... then I spend an hour trying to figure out why the power won't come on when I'm working in the back of the game. I have actually removed all of the interlocks on the back doors of my games... now I use them for test/service switches because some games (i.e. NBA Jam) need you to hold down the switch to stay in service mode so you can just pull out the interlock and it works great.


thats actually a good idea. Probably do that with mine.
 
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