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(Topic ID: 275261)

Jurassic Park (Premium) T-Rex Error


By PumRibby

3 months ago



Topic Stats

  • 75 posts
  • 10 Pinsiders participating
  • Latest reply 9 days ago by PumRibby
  • Topic is favorited by 13 Pinsiders

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Topic poll

“What will the solution to my problem ultimately be?”

  • Bad Stepper Driver Board 1 vote
    50%
  • Fault in the Game Code 0 votes
  • Node 9 0 votes
  • Wiring 0 votes
  • Stop worrying. Life finds a way. 1 vote
    50%

(2 votes)

This poll has been closed.

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There are 75 posts in this topic. You are on page 2 of 2.
#51 82 days ago

Let me first off by saying that you are not alone and that I feel your pain. This is my first post on Pinside as I normally just read through forums but don’t ever chime in. I received my Jpp on 7/14/2020 and finally after replacing several boards and the T-Rex I feel like I finally got it working 100% yesterday 9/8/2020... knock on wood. I won’t go into a ton of detail unless requested but just know that you are not alone. One thing I would check is that when the T.Rex is thrashing that his jaw isn’t hitting the left ramp. I noticed that sometimes my rex’s jaw would hang a little low ... just enough to hit the ramp and mess with his center position. I had to adjust the lower plate behind the rex in order to raise him enough to clear the ramp. My old Rex wouldn’t keep the ball in his mouth.... I suspect the magnet went bad. I spent nearly 8 k on a new in box pinball machine which gave me problems pretty much since day 1. I don’t mind working on pins as a hobby but to spend that kind of money on a brand new machine I expected perfection. Maybe that’s not the reality with pinball machines but again I expected perfection for that kind of money. Thank god for their tech support (Pablo) and the six month warranty or I would have been SOL. Now that its finally up to snuff I am enjoying it. The highlight for me is the six ball chaos mode... yesterday I was killing it... smacking all the balls through just about every way they could go... ramps , orbits , control room.. everything...it was awesome and I swear it lasted like 10 minutes... I was wore out but felt so satisfied blowing up the machine like that and having everything go crazy. Anyway I don’t want to ramble on to much but just wanted to let you know that your not alone with these issues. Thanks for reading

#52 82 days ago

Yeah, I've had something similar with my Star Wars Pro. A weird and frustrating issue with the loop posts. I won't go into the details, but it was seemingly unique, and hard to figure out what was wrong. I think it's fixed now, but I need to put more games on it to make sure. And I concur that I never expected to really have any major issues with Stern NIB games, maybe some adjustments here or there, but nothing serious. I guess I know now that just because it's a new Stern, doesn't mean you won't have problems.

The thing is, I feel like it's easier to diagnose and fix issues on my older games. With these new Sterns, if it's not an opto or a mechanical clearance issue, then it gets harder to figure out what's wrong. But I suppose part of it is that with the older games there is a lot of documentation, and I feel like it's easier to spot on-board issues with the older pins too.

Still, at least we have actual Stern tech-support. We don't have that with our older games, but I suppose places like Pinside are kinda the next best thing.

#53 82 days ago
Quoted from TiltedArcade:

Let me first off by saying that you are not alone and that I feel your pain. This is my first post on Pinside as I normally just read through forums but don’t ever chime in. I received my Jpp on 7/14/2020 and finally after replacing several boards and the T-Rex I feel like I finally got it working 100% yesterday 9/8/2020... knock on wood. I won’t go into a ton of detail unless requested but just know that you are not alone. One thing I would check is that when the T.Rex is thrashing that his jaw isn’t hitting the left ramp. I noticed that sometimes my rex’s jaw would hang a little low ... just enough to hit the ramp and mess with his center position. I had to adjust the lower plate behind the rex in order to raise him enough to clear the ramp. My old Rex wouldn’t keep the ball in his mouth.... I suspect the magnet went bad. I spent nearly 8 k on a new in box pinball machine which gave me problems pretty much since day 1. I don’t mind working on pins as a hobby but to spend that kind of money on a brand new machine I expected perfection. Maybe that’s not the reality with pinball machines but again I expected perfection for that kind of money. Thank god for their tech support (Pablo) and the six month warranty or I would have been SOL. Now that its finally up to snuff I am enjoying it. The highlight for me is the six ball chaos mode... yesterday I was killing it... smacking all the balls through just about every way they could go... ramps , orbits , control room.. everything...it was awesome and I swear it lasted like 10 minutes... I was wore out but felt so satisfied blowing up the machine like that and having everything go crazy. Anyway I don’t want to ramble on to much but just wanted to let you know that your not alone with these issues. Thanks for reading

Appreciate the post. Thanks for it! There’s light at the end of the tunnel! I too tend to only read the the threads, but it’s only in times like these when all the other threads fail me in my issue that I had to be vocal.

I get my new t-rex today. My current one isn’t hitting the wireform when it thrashes and I’ll make sure the new one isn’t either. I’m definitely going to post the results here. I love repairing arcade and pinball machines, but like you, I didn’t expect it so soon.

In the end, like other troublesome mechs in the past that had problems and ended up leading to a more bulletproofed solution, I hope this thread does that for an otherwise awesome game.

I am a lot better at fixing machines than playing them, I’m afraid. I tend to stay in the low 100 million when it comes to points. I love how challenging this one feels. I want to be a better player and harder machines are frustrating but more helpful. (I’m looking at you, Bram Stoker’s Dracula!) I’m planning to start live streaming/recording my games soon as a way to, hopefully, show improvement over time for anyone that is like me.

Thanks again for your post and have fun playing!

#54 82 days ago
Quoted from DakotaMike:

Yeah, I've had something similar with my Star Wars Pro. A weird and frustrating issue with the loop posts. I won't go into the details, but it was seemingly unique, and hard to figure out what was wrong. I think it's fixed now, but I need to put more games on it to make sure. And I concur that I never expected to really have any major issues with Stern NIB games, maybe some adjustments here or there, but nothing serious. I guess I know now that just because it's a new Stern, doesn't mean you won't have problems.
The thing is, I feel like it's easier to diagnose and fix issues on my older games. With these new Sterns, if it's not an opto or a mechanical clearance issue, then it gets harder to figure out what's wrong. But I suppose part of it is that with the older games there is a lot of documentation, and I feel like it's easier to spot on-board issues with the older pins too.
Still, at least we have actual Stern tech-support. We don't have that with our older games, but I suppose places like Pinside are kinda the next best thing.

We have had a few broken pinball machines in our collection for years as I only repaired arcade games and was intimidated by even looking at a pinball machines innards. I never even considered buying a pin until I learned how to fix them about a year ago. Now we have 10 working in the arcade. There’s so much that can go wrong (misaligned, broken, missing). I would think that as the industry is shifting to what seems like more home arcades that they would have to adapt and make them more user friendly and that would definitely start in the manual. I’m not interested in the quick start pamphlet. Give me the phone book size manual with it all in there.

#55 82 days ago

I think it’s great that you started the topic as I’m sure it will help many people. I’ll try to contribute to it by adding some more of my findings. Lamp board 9a can affect the movement of the T.Rex. I was having an issue where the leds On 9a would come on and off and or flicker. Whenever they would go out the T.Rex would not move vertically ... that’s because the node 9 board runs to the 9a lamp board and then to the vertical board that leads to the T.Rex. Once I replaced all of these board (just to be on the safe side) the Rex moved in every direction like it should. I’m not sure why that lamp board had issues right out of the box but I did notice that node board 9 had wires connected to the cn2 connection instead of the cn3 like it says it should be in service manual. I don’t know if it makes a difference but I connected it to the cn3 since that’s how they have it listed in the book. I also had an issue with the pinball never making it down the plunger lane straight enough to carry enough velocity to reach the wire form. People have already covered this... here’s a link


Don’t over tighten the screws that mount the T.Rex as they are small and will break. If I think of anything else that’s useful I’ll post it here. Thanks for starting this topic as I don’t believe this was here when I first got my Jpp and it’s definitely needed.

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#56 82 days ago
Quoted from TiltedArcade:

I think it’s great that you started the topic as I’m sure it will help many people. I’ll try to contribute to it by adding some more of my findings. Lamp board 9a can affect the movement of the T.Rex. I was having an issue where the leds On 9a would come on and off and or flicker. Whenever they would go out the T.Rex would not move vertically ... that’s because the node 9 board runs to the 9a lamp board and then to the vertical board that leads to the T.Rex. Once I replaced all of these board (just to be on the safe side) the Rex moved in every direction like it should. I’m not sure why that lamp board had issues right out of the box but I did notice that node board 9 had wires connected to the cn2 connection instead of the cn3 like it says it should be in service manual. I don’t know if it makes a difference but I connected it to the cn3 since that’s how they have it listed in the book. I also had an issue with the pinball never making it down the plunger lane straight enough to carry enough velocity to reach the wire form. People have already covered this... here’s a link
Don’t over tighten the screws that mount the T.Rex as they are small and will break. If I think of anything else that’s useful I’ll post it here. Thanks for starting this topic as I don’t believe this was here when I first got my Jpp and it’s definitely needed.
[quoted image]

That’s interesting about the lamp board. Wasn’t an issue on mine, but still good info. There is so much going on to make the t-rex perform properly, I feel we’ll be needing this thread for years to come.

#57 81 days ago

The Tale of Two T-Rex's

Replacement t-rex arrived today from Stern. Just so you know, you don't get to keep the old one. You have to send it back. Of course, I immediately wanted to install it. Before I did, I compared them both side by side and I couldn't visually see any difference...(more on that later). The only thing I did was add a zip tie like on the old one to keep the wires from raising up and possibly interfering. It is just the top part so I had to swap out the vertical motor. Installed it in the game, paying very close attention to not binding any wires and ensuring that the head had freedom of movement. In the settings, (GAME ADJUSTMENTS) I turned the stepper back ON. Exit to DIAGNOSTICS > GAME > HORIZONTAL and immediately could tell a difference in just how it sounded.

Thrashed it a few times in settings and it centered every time. It seems to work properly now! The park can open for visitors! I packed up the old one and sent it out!

....In my excitement.... I failed to notice one major difference between the old t-rex and the new one..... the new one has no tongue. (SIGH) The old one was already picked up and is on its way back to Stern. The new one works, so I'm very hesitant to mess with it. I'll let Stern know anyway.

Any other T-rex problems or solutions that come up, feel free to post them here.

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#58 81 days ago

Excellent, glad to hear that your JP is now working properly. I actually didn’t remove the vertical motor when I installed my new T.Rex.... I left it intact and instead removed the screw that holds the top of the plastic shaft. Once the new Rex was mounted I simply reconnected the plastic shaft. The outside screw is a # 10 and the inside one I think is a # 6. (I used an adjustable wrench as getting a socket on it was a pain). It’s all good either way but thought I would document this as it may be a little easier for the next person.

#59 81 days ago

I’m so glad you mentioned about the tongue because I knew something was different with the new T.Rex but I couldn’t quite figure out what it was. It’s just a sticker and I was able to remove it from the old rex with a hairdryer and stick it on the new one. Thanks for the heads up on that... glad I read your post before I sent the old one back.

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#60 81 days ago
Quoted from TiltedArcade:

I’m so glad you mentioned about the tongue because I knew something was different with the new T.Rex but I couldn’t quite figure out what it was. It’s just a sticker and I was able to remove it from the old rex with a hairdryer and stick it on the new one. Thanks for the heads up on that... glad I read your post before I sent the old one back.
[quoted image][quoted image][quoted image]

Maybe they’ll send me the sticker then. However, what color is a real t-rex tongue? Not a big loss either way. Just aesthetics.

#61 81 days ago

It’s pink... lighter in the front and darker in the back. See above for picture

#62 81 days ago
Quoted from Thefuge:

replace my machine completely

Curious as to what issue would warrant a complete replacement?
Sorry OP don't mean to derail your thread.

#63 81 days ago
Quoted from TiltedArcade:

It’s pink... lighter in the front and darker in the back. See above for picture

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I guess it really was pink in the movie.

#64 81 days ago
Quoted from transprtr4u:

Curious as to what issue would warrant a complete replacement?
Sorry OP don't mean to derail your thread.

All good.

#65 81 days ago
Quoted from PumRibby:

It sounds like a stuck switch somewhere. I would go into the switch test in utilities and check to see if any switch is activated that shouldn’t be first. Then go from there.
Default is to have two letters For MAP already lit at the beginning of the game. So one of the white arrow paths is probably where the switch is stuck.

Turns out you are correct. Switch 59 aka T-Rex exit ramp opto is stuck ON. It appears to be the piece that is on the backside of the ramp only accessible from behind the back panel. It seems that the slightest touch, vibration, up pressure or down pressure switches it to off. But when released it goes back to the ON position. Almost as if the weight of the cables alone are switching it on.

#66 81 days ago
Quoted from DangerzoneArcade:

Turns out you are correct. Switch 59 aka T-Rex exit ramp opto is stuck ON. It appears to be the piece that is on the backside of the ramp only accessible from behind the back panel. It seems that the slightest touch, vibration, up pressure or down pressure switches it to off. But when released it goes back to the ON position. Almost as if the weight of the cables alone are switching it on.

I haven’t messed with optos on Sterns before, but from my experience with others, probably out of alignment then. One of them is loose or turned breaking the beam making the machine think the ball is passing through.

#67 81 days ago

Update:

A tongue decal is on the way! The t-rex will be tasting the balls again soon! (There’s a joke in there somewhere.)

Plus, my shooter rod that I ordered with my machine is finally shipping too!

#68 81 days ago
Quoted from PumRibby:

Update:
A tongue decal is on the way! The t-rex will be tasting the balls again soon! (There’s a joke in there somewhere.)
Plus, my shooter rod that I ordered with my machine is finally shipping too!

did they send you just the head + the stepper in the head or the complete assy ?
So wierd that my problem isnt solved by a new head, might be from the same batch then i guess?

#69 81 days ago
Quoted from Thefuge:

did they send you just the head + the stepper in the head or the complete assy ?
So wierd that my problem isnt solved by a new head, might be from the same batch then i guess?

The complete assembly sans the vertical motor. You can see it in my pictures above.

#70 80 days ago
Quoted from PumRibby:

I haven’t messed with optos on Sterns before, but from my experience with others, probably out of alignment then. One of them is loose or turned breaking the beam making the machine think the ball is passing through.

All fixed. Black motor soot likely from the T-Rex had covered the opto sensor. Cleaned it with a rag and back to perfect again. Two mins of work for hours of troubleshooting pain.

#71 80 days ago
Quoted from DangerzoneArcade:

All fixed. Black motor soot likely from the T-Rex had covered the opto sensor. Cleaned it with a rag and back to perfect again. Two mins of work for hours of troubleshooting pain.

Good to hear! Hours of pain is knowledge gained. It will just be easier to spot next time. Have fun!

#72 78 days ago

So glad you got your Jpp up to snuff

#73 78 days ago
Quoted from TiltedArcade:

So glad you got your Jpp up to snuff

Thanks. I am too. I’m still a little gun shy with it though. I get worried every time it thrashes.

#74 78 days ago

Use and abuse the crap out of it while it’s under warranty seriously . On a side note I went to a pinball tournament today and guess what... I met the guy who’s video I posted above. His name is Craig as well and his channel is hurry up pinball. Such a small world but glad I can be a part of it. Rock on everyone.

2 months later
#75 9 days ago

...So three months later. I got my tongue decal in. It’s been so long I forgot about it. LOL. Kudos to Stern for not forgetting though. The T-Rex head is still working properly BTW. Just FYI you can find me on Twitch.tv/arcadedungeon as I repair other machines.

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