Jurassic Park
Data East, 1993You're currently viewing posts by Pinsider tomass.
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I am trying to help a friend fix his JP. His dino moves left and right and slightly up and down, but will not bend down to grab the ball. I noticed a spring hanging and was looking for a pic that shows where to attach it. Can someone snap a pic to share please?
20210315_164711 (resized).jpg20210315_164709 (resized).jpg20210319_081600 (resized).jpgQuoted from GRB1959:Here you go as per your request.
Gord
[quoted image]
[quoted image]
Thank you!
Quoted from gdonovan:On the right side, optional printer.
On the left, someone removed the knocker. I bet the strike plate is still on the cross beam.
Pinball life sells a new assembly.
https://www.pinballlife.com/data-eastsega-knocker-assembly.html
Thank you so much! Helps a ton.
I am trying to figure out a faulty T-rex. All the positioning switches work in test mode but as soon as I boot the game it moves in one direction and will not stop when the switch is hit. It binds up and keeps trying to push past the switch. Would this mean it is likely the horizontal relay? Is there a way to test this relay? Thanks
I am still having issues getting the Trex to pick up the ball. All switches test fine. I can't get it to stop on the middle switch however. If I push R or L he goes all the way in that direction. If I try to drop him as it moves past the middle switch it tries to work but have to keep moving L and R to keep it centered. In game he seems to try to lower himself while all the way to the R and hits the plastic. Does anyone have any thoughts on why this happens or what I can look at to fix it? Thanks for any help at all.
Quoted from winteriscoming:Is it locked on moving in one direction constantly? If so, it's likely a transistor that needs to be replaced.
https://pinside.com/pinball/forum/topic/jurassic-park-t-rex-side-to-side-motor-issues
What's happening in game is the middle switch is getting triggered, so the game turns off left/right movement, and initiates the up/down motor. But your side to side movement is locked on, so it moves to the side while bending down. I would recommend unplugging the t-rex until you fix it. Leaving it locked on means it's grinding its gears once it hits the side.
So the middle switch is working and in-game it moves back and forth but tries to scoop down while all the way in one direction. He seems to work fine except this issue.
Quoted from winteriscoming:There are 2 transistors controlling left/right. One turns the motor on, and the other controls the relay that controls the direction. So you're moving left and right. That tells me the relay and transistor controlling it are good. Basically the relay makes it go one direction when not powered and the other direction when powered. So if the motor is locked on, and the relay is off, it will always be moving in that direction until the game energizes the relay and it goes the other direction.
So I want to know whether or not the motor is locked on.
In the manual test where you control it, move it all the way left and let go. Does it move all the way back right or perhaps it keeps trying to move left and you hear it grinding gears? Same test in the other direction.
A working t-rex will completely stop at any point in the full left/right range of motion if you're not pressing left/right.
Ok, I am not in front of the game now, but it does not stop in either direction if I let go of the button.
Btw, Thank you for helping me on this.
Quoted from winteriscoming:There are 2 transistors controlling left/right. One turns the motor on, and the other controls the relay that controls the direction. So you're moving left and right. That tells me the relay and transistor controlling it are good. Basically the relay makes it go one direction when not powered and the other direction when powered. So if the motor is locked on, and the relay is off, it will always be moving in that direction until the game energizes the relay and it goes the other direction.
So I want to know whether or not the motor is locked on.
In the manual test where you control it, move it all the way left and let go. Does it move all the way back right or perhaps it keeps trying to move left and you hear it grinding gears? Same test in the other direction.
A working t-rex will completely stop at any point in the full left/right range of motion if you're not pressing left/right.
So I made it back to my buddy's house and I found Q24 and Q39 to be shorted. I suspect that will fix his dino, but I also saw this oddity while removing his board. The housing has more connections than the board does. I am not sure what these wires are running to that are not connected. Does anyone have a pic of what this connector should look like?
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Wasilla, AK
London, ON