Virtua Racing problems

gridrunner

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Hi everyone,

I finally got some time to clean up and power on the VR upright from Phil's Ops clearout sale. I had the control panel off and cleaned up, cleaned up the screen and plastics and cleaned out the interior. I've never seen a more complicated arrangement of PCB's and molex plugs in my life prior to working on this game. Nonetheless, the game boots fine and the paddle shift issue was an easy fix. However, two gremlins are spoiling the occasion.

The first is the steering. On power up the force feedback motor runs up and keeps running for something like 30 seconds. I can push against it so the clutch is working but it seems to run an awfully long time as though it's trying to centre the wheel. When I start a game, the steering behaves very oddly. The car wheels point either fully left or fully right. There is no movement at all until a certain point in the travel is reached when the wheels flip over. Pointing the car forwards and controlling it is impossible. The two nylon gears (steering shaft and pot gear) initially weren't fully meshed and the rotation of the Pot gear was stop and start. I adjusted them so that they now move togeher. When I go into self test the Pot for the wheel puts out readings as I turn the wheel round so I'm not sure what's going on. I did clean the Pot and the wiring is correctly seated.

The second gremlin is with the monitor. It looks like the surface of mars. All the colours are wrong. I'll get some pics of this, but it looks as though either a gun is out or is being over-driven. When I do a monitor self test colour test I get pastel shades. I'd expect it to be red, green, blue. Can anyone confirm what this test is supposed to show?

thanks for any help.

stu
 

thechop

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I have a cp with no paddle shifters but your welcome to it its got the motor /clutch and all that, think I also have a spare motor and clutch too knocking about, dunno if it'll solve your probs, think I have a couple of the drive boards too with the led displays on.
Heavy but shippable by courier I bet.thechop2013-05-19 22:16:05
 

gridrunner

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Hi everyone,

A quick update. I managed to adjust the steering into a playable tolerance. I must have moved gears out of alignment during cleaning. However, something strange is going on with the feedback motor and I found a missing gear in the bottom of the cab:

photoVR.JPG


This gear was on the floor and might have been there sometime as the retaining screws were missing. I re-fitted and secured it, following a pen mark between the two gears that provided an earlier alignment cue. However I've no clue what the Pot for this gear does. Does anyone have a VR manual or can tell me what this lower gear is for?

The feedback motor seems to be struggling on start up. I'm not sure if it is trying to test freedom of movement right and left, but the drive only engages intermittently and it struggles to turn over the wheel. It then fails to work in play.

Can anyone shed any light on this? I'm thinking the clutch might have gone.

thanks

stu
 

thechop

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Can't remember what that's for tbh but I know my upright would always do the left /right checks on boot up but first run through the game never had feedback, second credit and beyond always did.
Was always the same as long as I had it and I remember the fella I had it off telling me the same when I bought it. Strange one.
Got that full cp and a spare motor and clutch for you here anyhow mate so should be able to sort it, just gotta find a box big and sturdy enough to put it in.
 

retrorepair

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One gear will be for your steering and the other is for force feedback. It's probably wobbly because it's not aligned.

It's exactly the same motor setup as daytona/rally though so the manual for that should help.

If your clutch is truely stuffed though mo has spare daytona panels with the motor etc, I actually have one for sale too and it's cheaper ;)

Try messing with that gear first though.
 

gridrunner

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Thanks guys. From looking at a Rally manual, the lower gear is indeed for the drive board. The upper is for the gameboard. It might well be that the drive board pot is not aligned and that's what's causing it to fail. I'll check it out with the test menu values tomorrow.
Ta
 

gridrunner

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As a general tip you can align the gameboard pot by hand. Loosen the retaining plate and twiddle the gear by hand until you see the wheels are centred on the car, the re-mesh the gears before securing the plate with the steering wheel in the centred position. This isn't possible for the drive board pot and I have a theory now that a bad value from it is confusing the drive board. The clutch was providing solid resistance earlier on without slipping. Update tomorrow. This truly is an awesome game though. I forgot how well it plays.
 

gridrunner

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Hi Guys,

A quick update on this. The force feedback is working now, albeit a little noisily - probably the belt needs adjusting or it's just worn bearings. At any rate, I didn't realise the VR value for the clutch is shown on the drive board test menu and not the input test menu. The trick is to get both returning the same value for any point in the wheel's travel.

The manual was invaluable here:

http://home.comcast.net/~mtpacifico/_arcades/virtuaracing/virtuaracing.html

I disabled the power up test as it was annoying.

stu

gridrunner2013-05-26 20:50:41
 
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