Jurassic Park
Data East, 1993You're currently viewing posts by Pinsider toine79.
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I joined the club with a very dirty routed machine.
Lot of problems on it:
Lights in the backbox are all out, but flashers do work.
Upper flipper does not work when pushing the right button.
T rex just moves its jaw during test. Does not go up and down nor left to right.
Found also 2 wires with connectors in the cabinet on the right side
Power supply board raped by an operater.
DSC_3960 (resized).JPGDSC_3961 (resized).JPGDSC_3976 (resized).JPGDSC_3990 (resized).JPGQuoted from gdonovan:Optional printer.
For the GI check plugs at power board, PPS board and the connector where the back board hinge is. Look for burnt pins.
Could you give me an indication (picture) where to find the Pps board and the connector in the backbox?
Thanks.
Hello,
Is It possible to post some pictures of the T rex assembly and the wiring of it under the playfield?
Thanks.
Found some issues with broken diodes and broken wires.
Will repair the Power supply board because connector is toasted and 2 fuse clips are broken.
Quoted from onemoresean:[quoted image]
Thanks man. One more question about pin 2 and 3 about those orange wires.
What is the position of BR2 and BR3 on the BR?
Pin 2 on Cn1 is connected with BR2 and Pin 3 is connected with BR3?
I need some goggles to read this. I'm getting old
Does anybody have a clear schematics for the power supply board?
I have problems with CN3, CN1, CN7 and CN8.
I think some wires are not connected to the pin they need to be connected.
Received my repaired power supply board today and only the GI on both slings work. All the rest is dead.
Thanks man but not exactly what I'm looking for. I'm looking for this schematics with the colors of the wires on every pin of the specific connector like on the Bally Williams schematics.
I had problems with cn1, cn2 and cn 8.
Replaced it and now nothing is working.
Quoted from scootss:Does anything in here help?
https://www.arcade-museum.com/manuals-pinball/J/Jurassic_Park_OPS.pdf
Hello and thanks but this is the copy that I have but I cannot read it.
If possible I would like a clear and large picture of an original manual.
Thanks
Quoted from Billc479:There’s a x connector that feeds the back box gi lights. Verify that connector is good
I will try to explain this situation.
When I test the wires from CN8 to the wires in the back of the backbox bulbs I have continuity to all the wires except white-Brown.
When I test the Brown wire in the connecter I receive a signal when I touch the brown wire in the backbox but also when I touch the white green wire on the backbox.
Quoted from Billc479:The short answer is yes.
Check the “Z” connector for burned pins. I’ve attached two pics to show what I’m referring to. On my machine, part of the gi was out because of a bad in in the connector.
Follow the cable from the door, you should see the connector.
[quoted image][quoted image]
Will look at this. Stupid question but I can swap it with a 6 pin molex connecter?
Quoted from Billc479:The short answer is yes.
Check the “Z” connector for burned pins. I’ve attached two pics to show what I’m referring to. On my machine, part of the gi was out because of a bad in in the connector.
Follow the cable from the door, you should see the connector.
[quoted image][quoted image]
The GI is starting from CN8 from Power supply and splits to the backbox via Z connector and playfield?
I only have GI in the back part of the playfield starting from the 3th flipper.
The front part of the playfield and backbox still out.
Could this be a broken wire or diode?
Thanks.
Quoted from gdonovan:1) Power flows out of the power supply connector to the PPB and then out to the playfield and backglass.
2) Check to make sure you have power flowing out of the power supply board (bad solder joints and burned connector common) and check power flowing out of the PPB past the fuses. (bad solder joints and burned connector common) its a very simple circuit.
4 power lines (and returns) come out of the power supply board, go through the PPB and the 4 fuses and from there to various locations. [quoted image]
Thanks but how do I check it?
Via DMM on the back of the boards?
Via the connectors?
Machine powered on or off?
Quoted from gdonovan:Follow the power, back box connector at the hinge known for getting toasted. Try wiggling the connector there to see if it flickers on and off.
Could you give me a picture of that connector please?
Already Thanks for the info.
Problem solved.
It was a combination of the wires not touching the pin in the connector and the power supply board that was loose in the backbox.
Now figuring out the problem with the ghost switches
Thanks for helping me with this GI
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Ronkonkoma, NY
London, ON