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Ridge Racer Accelerator Potentiometer
fatsgt:
I just picked up a Sit Down Ridge Racer Machine. The game is started by pressing the gas pedal but nothing happens which likely means there is an issue with the pot.
I took the assembly out and this is what it looks like:
I assume the first thing I would want to do is check the voltage on the Potentiometer to make sure I'm getting 5V. There are three wires coming from it, what combination should I choose to check it with my voltimeter? (Sorry, very new at this)
Second question, if I need new pots, which ones should I order and who has the best prices? The manual says "Accelerator/Brake Control Pot (5k) 76000652" but I haven't been able to locate it with that part #.
Thanks folks!
Paul Olson:
The two outside wires are 5v (red/white) and ground(probably black/white, but I can't see in the pic). Black lead on the black/white wire, and the read lead on the red/white wire. That should read right around 5 volts.
Once you have varified that you have 5v going to the pot, you can move the red lead to the middle wire. The voltage reading there should travel between 0 and 5 volts as you turn the pot. You will have a somewhat limited travel due to the range of the pedal, so you will only see part of the 5 volt range. The main thing you are checking is that the value is changing as the pot is turned.
If the pot seems to be working, trace the middle wire to the board and make sure that you read close to the same voltage at the board. If not, the problem is somewhere between the wire and the board.
If the voltage is getting to the board fine, the pot may need to be adjusted. The pedal may not be be moving the pot far enough for the game to register a full pedal press. I think there is a test menu on Ridge Racer (not sure though, I sold mine about 5 years ago, so the details are a little fuzzy). You can look at the throttle input there to see the range in hexidecimal. You will probably need to find a manual to see what the range is supposed to be though.
If you need a new pot, I think you can get them from Happ still, but they are around $25 each. Radio Shack may have some that will work, but you may have to cut the shaft to make it fit. Probably the best bet is to put a wanted post up here and at KLOV to see if anyone will sell you a spare.
Also, it looks like it is probably fine, but I can't tell for sure in the pic, but make sure the lugs from the pots aren't touching the metal frame.
fatsgt:
Thanks! What setting should my multimeter be set at to test if it's getting the 5V? Should the machine be on or off? Ugh, confused. :)
Paul Olson:
Set it to DC voltage. If your DMM is not auto ranging, set it to the lowest setting that is above 5 volts (it will probably be 20v). The machine will need to be on to get the 5v to the pot.
fatsgt:
OK, so using my Multimeter, with the machine on, I put the red lead on the red/white wire and black lead on the black.white wire... No reading. I also had someone hold down the pedal... No reading. I was doubting that I was using my volt meter properly so I tested in on a coin door light and it read 17V.
So if I tested correctly, there is no power making it to the pots correct?
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