Spy Hunter calibration problems.

pmagames

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I bought a Spy Hunter upright a few months back, and the steering has been giving me tons of problems. Sometimes the game will play correctly, but most of the time the car will want to turn right the whole time. If I steer left slightly, it will start going left, but if I make a hard left, the car will go back to the right.

I've tried changing over to a completely different control panel as well as switching out the Absolute Position board, but nothing has helped. I have gone into the calibration menus to try and get it centered, but the values are messed up in there as well. Any ideas?
 
I'm interested in an answer to this as well. I recently got one with all sorts of issues and sometimes it goes to the left and accelerates all the time. Other times it's fine. I have not tried anything I fix it as I'm working on other issues... This one always corrects its self after a few resets. Sometimes more than a few.
 
I thought that I had found a way around it last week, because every time I would turn the machine on in the test menu, the game would calibrate properly. Well that only worked out for a couple of days, then it went back to being a turd. When I have it in storage and mess with it, it seems to work and calibrate just fine, then as soon as I put it back in the arcade it starts acting up again. Hopefully someone has some suggestions for us!

I'm interested in an answer to this as well. I recently got one with all sorts of issues and sometimes it goes to the left and accelerates all the time. Other times it's fine. I have not tried anything I fix it as I'm working on other issues... This one always corrects its self after a few resets. Sometimes more than a few.
 
Are you running with the original steering wheel pot? May be worn out.

> Sometimes the game will play correctly, but most of the time the car will want to turn right the whole time.

I'd clip some alligator clips on the steering wheel pot and check what voltages are being returned with a DMM as you slowly turn the wheel. You should get a nice smooth progression. If you get crazy values that are jumping around then you probably just need a new pot.
 
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I'll have to try it tomorrow when I go down to the shop. I had switched to an entirely different control panel and it still did the same thing, I guess there's a chance that they both could be messed up.
 
Are you running with the original steering wheel pot? May be worn out.

> Sometimes the game will play correctly, but most of the time the car will want to turn right the whole time.

I'd clip some alligator clips on the steering wheel pot and check what voltages are being returned with a DMM as you slowly turn the wheel. You should get a nice smooth progression. If you get crazy values that are jumping around then you probably just need a new pot.

+1

This is where I would start and whatever the problem will lead from/to here.
 
I'll have to try it tomorrow when I go down to the shop. I had switched to an entirely different control panel and it still did the same thing, I guess there's a chance that they both could be messed up.

Yeah, a decent chance although it's usually the gas pedal pots that give more problems. If people have the original blue gas pedal pots still in their game there's virtually no chance of not having issues with it.
 
make sure there's not a wire loose in the connector at the absolute position pcb. Mine had a similar issue - it was a wire almost popped out of that connector. Pushed it back in good and its worked fine since.
 
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