Jurassic Park problems. Any ideas?

[raptor2002]

Any advice would be very helpful.

This is my first Pin, and had it since the beginning of the year. I
have worked on many older upright videos but this is a very different
beast to learn with many more wires, parts, etc.

If anyone has any ideas please fire away.

Jurassic Park Pinball.

Symptom:
Hold left flipper button and it will trigger the right side tunnel
popper, and trigger the left and right side front bumpers.

Symptom:
1 of the three turbo bumpers when hit will fire the missile
automatically, and activate the right side trench/tunnel ball popper.

Symptom:
Machine goes nuts. Will start activating rewards quickly and the
extra ball audio will play, and keep repeating. Sometimes the screen
will go funny.

Symptom:
When the ball goes through the Dock trigger leading to the left
flipper the machines deactivates the missile, and audio Raptor got him
plays.

Symptom:
On system boot up the right side trench/tunnel popper fires one time.
Everything else is 100% normal, and completes the test with no
problems.

What I have done:
Run diagnosis and nothing! Switches, etc. No problems.

Game runs fine until the first trigger/error of events begin. Problem
is different things seem to trigger that first event.

Diode checks, and switch checks. Found a couple questionable so just
replaced what I came across. No broken/disconnected wires under play
field. I had replaced a couple of switches on the ball track about 1
month before the problems began, but since re tested and checked
them. All good.

I have not taken the board out yet, but will probably tonight to see
if any resisters are burnt.

I disconnected the one turbo bumper and tested the other two turbo
bumpers are fine and do not trigger any other parts.

Frustrated. I used the logical steps for trouble shooting; now I have
no clue where to go.
I will test the fuses tonight, but it doesn't seem like a bad fuse
would cause these issues?

Any ideas of which direction to head? Anyone with similar problems?

Grrr. Help. ;)

[slic...@gmail.com]

I own a JP, and all I have to say is WOW. When you got the machine and
did it have all these symptoms when you got it?
If no, did all the symptoms come at the same time?
Look at the PCB's make sure there are no obvious signs of damage, make
sure all the correct wires are connected where they should be
connected.
I'm going out on a limb here, but if symptoms started occurring at the
same time, I would suspect something to do with the PCB's
-Slick

[Lloyd Olson]

The bridge rectifier(s) involved with the solenoids, replace them. LTG :)

"raptor2002" <msch...@gmail.com> wrote in message
news:1185556240.3...@22g2000hsm.googlegroups.com...

[bdie...@aracamerch.com]

sounds similar to this guy's problem:
http://groups.google.co.uk/group/rec.games.pinball/browse_thread/thread/ae0116dd196c5ca5/4e6bb7f37e6c8e7d?lnk=gst&q=&rnum=17&hl=en#4e6bb7f37e6c8e7d

you've got more on your plate, but his machine was going nuts like
yours- he says it turned out to be a broken switch on the ball trough
(even though you said you tested all yours and they're working. . .)
all of the other stuff sounds like a funky switch of some sort that's
freaking out the switch matrix. that's as far as my thinking takes me.

[di...@gotbluemilk.com]

i had a similar problem where some switches would activate the wrong
things, etc. it turned out to be a switch/diode in the trough was
grounding and causing all sorts of problems. check the trough as it
seems the other JP had trough problems as well.

[goatdan]

GREAT game!

Here is what I would suggest -- I didn't have this problem on my JP,
but have experienced many things similar with my Space Station.

First, open up the head and pull out and put back in all of the
connectors a couple times. After this has been done, turn the game
back on.

If this does not solve it, look in the game and see if there seems to
have been any battery acid damage. I'll bet you there has been. My
SS, which is a very similar board set, had a battery acid problem
where the game would function normally for about 10-30 minutes, but
once it heated up, it would suddenly freak out. Symptoms were very
similar to what you mentioned -- in SS, a pop bumper would turn on
suddenly and stay on, scores would register differently, and then soon
thereafter, the game would freak out, put some garbage on the displays
and then reset. Upon resetting, the game would tell you that you
needed to adjust a switch. When you cleared this, it would walk you
through *every* switch in the game, as it would register every switch
backwards -- so to start the game, you would take the balls out, and
it would just flip out immediately.

I ended up doing about a million and five things, and finally I
replaced the MPU. The game *immediately* began working flawlessly.

Good luck! Tell us what happens!

[bdie...@aracamerch.com]

come to think of it, there's a notorious wire harness on the underside
of the playfield (right side) that consistently runs the risk of
getting pinched between the playfield and the cabinet. I'm not sure if
this would have anything at all to do with your problem, but it's
worth a look. I believe the harnesss is in the area of the vertical
upkicker

[raptor2002]

Thanks for the replies.

It was the ball switch in the trough. Well so far I still haven't re
connected the turbo bumper that also triggered events, just been
playing some test games with the glass off and taking cover when ever
the ball makes it to the raptor pit :) Damn that's scary too for the
record.

A while back I had this great idea of rewiring the ball trough
switches with quick disconnects to 18 gauge wire to make changing
switches diodes faster and less soldering and un soldering and getting
the harness wires brittle, etc. When I did it on one of the
connectors where I ran the two green lines together one slide back and
didn't have full contact.

So of course the switch kept passing tests and checks I ran. Learning
curve. :)

I would say and agree with others, if any of the symptoms I listed
happen, start with the ball switches, diodes, and your connections to
the switches.

Thanks again everyone!