Jurassic Park Data East

MarkA

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I have 4 issues with a Jurassic Park that I cannot troubleshoot.
1) The right flipper "chatters". When I press the button during a flip the bat goes up. Then it goes into this phase where it drops down 1/2 inch and goes up a 1/2 inch in a vibrating manner until the flipper button use is stopped. I inspected the red piece of plastic that depresses the EOS switch for that flipper and it seemed to be melted.

2) If the ball drains immediately without scoring any points Jurassic park gives you that ball over. It automatically shoots the ball out into the play field. The ball lodges it self between the far left pop bumper and the playfield post near the upper side of that bumper. To get that ball removed I need to remove the playfield glass unscrew the top of the pop bumper and manually push the ball onto the playfield. It is not an issue until a player is given another free ball.

3) Shaker motor. The shaker motor does not seem to work at all.

4) When you shoot the ball up the ramp there is a diverter that diverts the ball to either the right or left flipper. It does not seem to divert. It seems to always divert the ball to the right flipper.

Thanks for any help.
Mark
 
Hope this helps.

RussMyers

I have 4 issues with a Jurassic Park that I cannot troubleshoot.
1) The right flipper "chatters". When I press the button during a flip the bat goes up. Then it goes into this phase where it drops down 1/2 inch and goes up a 1/2 inch in a vibrating manner until the flipper button use is stopped. I inspected the red piece of plastic that depresses the EOS switch for that flipper and it seemed to be melted.

RussMyers said:
That red plastic post is supposed to open the EOS switch when the flipper reaches full travel. They do tend to wear, so you may be able to turn it around so fresh plastic is touching the switch at end-of-stroke. You can just buy the replacement red plastic actuator as well, or put in complete flipper rebuild kits (my solution). The EOS switch in Data East is normally closed (NC) and should remain closed until the flipper reaches full travel and opens the switch, signalling the flipper board to drop the power stroke voltage (50v) to hold voltage (9 volts). Pics would help.
[/QUOTE=RussMyers]

I can PM you my email and phone number to talk more extensively.

I have a JP , so...

RussMyers

2) If the ball drains immediately without scoring any points Jurassic park gives you that ball over. It automatically shoots the ball out into the play field. The ball lodges it self between the far left pop bumper and the playfield post near the upper side of that bumper. To get that ball removed I need to remove the playfield glass unscrew the top of the pop bumper and manually push the ball onto the playfield. It is not an issue until a player is given another free ball.

RussMyers said:
Can you take a picture or three of this so we can see exactly where the ball is getting stuck? This is obviously not normal.
[/QUOTE=RussMyers]

3) Shaker motor. The shaker motor does not seem to work at all.

RussMyers said:
There are fuses on the control board right next to the shaker motor - remove these and test with a DMM. Also, is the connector actually connected?
/RussMyers said:
4) When you shoot the ball up the ramp there is a diverter that diverts the ball to either the right or left flipper. It does not seem to divert. It seems to always divert the ball to the right flipper.

RussMyers said:
Does the diverter move at all in Solenoid Test? Make sure the coin door interlock is closed when testing so the high voltage power is not cut off. Can you manuall move the diverter by hand? Rest position should be all the way to the left.
[/QUOTE=RussMyers]

Thanks for any help.
Mark
 
Thanks for your help I really appreciate it.

1) I will get the replcement part for the flipper. If it does not work I will buy a rebuild kit.

2) I will post a pitcure of the ball caught on th epop bumper as soon as I can. It may take me a couple of days because I loaned the machine to my 10 year old nephew.

3) I will check the fuses on the shaker motor and the wires to make sure that it is getting power.

4) I will run the Solenoid test to see if the diverter moves. I will post the results. Again thank you very much for your help.
 
On the shaker motor remove the plastic housing to make sure a wire did not get sheared off from terminal. The shaker motordoes vibrate. Things can move etc.

I think on my jp i had to just adjust switch to make better contact.

The diverter only diverts under certain circumstances.
 
Ball caught on playfield

this is a bad picture of the ball caught between the far left pop bumper and the playfield rubbers. If the ball drains immediately when in play The machine gives you a free ball and shoots it out onto the playfield. It gets caught between the far left pop bumper and the playfield rubbers on the far left wall. I will try to take a better photo and repost it.
 

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I have 4 issues with a Jurassic Park that I cannot troubleshoot.
1) The right flipper "chatters". When I press the button during a flip the bat goes up. Then it goes into this phase where it drops down 1/2 inch and goes up a 1/2 inch in a vibrating manner until the flipper button use is stopped. I inspected the red piece of plastic that depresses the EOS switch for that flipper and it seemed to be melted.
Mark

What could be happening is a mushroomed plunger, the plunger will not let the air out of the solenoid, since it is mushroomed, and as a result the trapped air acts like a spring, and pushes the flipper back down, to where the EOS opens, applying a high hold voltage, which pushes the flipper up to compress the air to.... you get the idea. I doubt that the red plastic is the issue.

2) If the ball drains immediately without scoring any points Jurassic park gives you that ball over. It automatically shoots the ball out into the play field. The ball lodges it self between the far left pop bumper and the playfield post near the upper side of that bumper. To get that ball removed I need to remove the playfield glass unscrew the top of the pop bumper and manually push the ball onto the playfield. It is not an issue until a player is given another free ball.
Mark

Nice ball trap. From what I can see, is that the pop bumper is not firing to kick the ball out of that location. It also looks like there is a missing half-height black rubber on that post as well. Rubber diagram is located here:
http://i633.photobucket.com/albums/uu54/co_goose/Pinball/JP_Rubber_Chart-1.jpg
And a thread with lots of JP information is here:
http://forums.arcade-museum.com/showthread.php?t=171738&highlight=jurassic

3) Shaker motor. The shaker motor does not seem to work at all. Mark

There is also a setting in the Adjustments menu to turn it off. Verify that it is set to On.

4) When you shoot the ball up the ramp there is a diverter that diverts the ball to either the right or left flipper. It does not seem to divert. It seems to always divert the ball to the right flipper.

Thanks for any help.
Mark

Check the diverter in the diagnostics menu to see if it works, then look for a broken wire on the diverter coil.

Keep us informed, there are a lot of Jurassic owners on this forum.
 
more pics of the ball caught on Jurassic Park between yellow pop bumper and side playfield rubbers.
 

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Mark - I'll get you some pics of that area on my JP today (if I can) but you are missing some rubber on that metal post.

I also suspect that pop bumper is not popping.

What you have overall is a JP in need of a complete going-over, shop-job and tuning. That's something any local pinhead (pinball collector/enthusiast) can help you with.

You game is dirty, has dried-out cracking rubbers and just needs some TLC.

Exactly where are you located?

If we can get some feet on the ground to help you out, that would be best.

RussM
 
JP

Im sure that I can trouble shoot it. I have worked on many EMs not as many SS. I will look at it to see if the sensor on the pop bumper is making contact. I know that the solenoid works because when I touch it manually it pops. Either it needs to be adjusted or maybe there is plastic on the bumper skirt that is broken. I wont have any problems replacing play field rubbers. I may have some more questions. Thanks for your help Russ. Mark
 
Okeedoke.

For the pop bumper:

1. Check to make sure that one of the wires hasn't broken off one of the solenoid's tabs - very common due to vibration. Also look at the wires going to the leaf switch. All three pop bumpers should look essentially identical so it's easy to compare them

2. If the wiring looks OK, throw the game into Diagnostics, and scroll forward to Switch Levels Test. If you press down on the pop bumper's skirt, the switch should register on the display and there will be a sound cue. If that bumper's switch does not register, but the other bumper switches do - there's the issue.

JP is a great game, one of the best. I love mine.

OK just re-read your description - it's working when you manually hit the skirt.

With the glass off, start a game, toss a ball in there among the three pop bumpers and what happens?

RussMyers
 
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