Data east jurassic park pinball8/19/2023 Symptom: Sometimes the dinosaur can not properly grip the ball resulting in it slipping from the dinosaur’s mouth. The new program provides a more intelligent speed control to help slow it down prior to the limit switch closure. (The motor operates one of the switches used to stop it’s rotation and due to wide variations of the motor speed, over travels and strikes the mechanical stop.)Ĭure: To prevent shock to this motor, use the attached diagram to adjust the left and right limit switches and change the program to version 5.00 as supplied in the kit. Symptom: The Left-Right motor fails prematurely, or struggles to move the head left and right.Ĭause:Damage to the gearbox, due to excessive speed of the mechanism. This slowed the left/right motor down to reduce wear and tear on the gears.ĬPU 5.10 is the latest revision and was released strictly to eliminate the display blanking out in attract em #4). v5.01/v5.10 / Service Bulletin #53ĬPU 5.01 is the latest T-Rex related update. Solution: Install CPU/DISP EPROM Revision 5.10. at which time the game micro-processor goes into a wait status which times out in approx. Problem: There is a communication error between the game C.P.U. The display blacks out for approximately 15-30 seconds. Symptom: We have found a condition that occurs in some games, in Game Over Mode. Info is not complete, but this info was included in official service bulletins) v5.10 / Service Bulletin #47 I will let you know if this has solved the issue.Print Revision History: (Included for reference. Obviously more playing is required to make sure and I will also put the original PS back in to test it as well and thereby using my new XPIN PS for another game. On Saturday I pulled the DMD out of my GnR and installed it and the game played with no loss of background sound after a few games. The DMD that came with the game was faded to one side so I swapped it out with one from my IJ and the game was fine for a week or 2 before the first loss of 5v issue arose so I had no idea it could be the DMD! But now I understand ( sort of ) of where the problem was. Initially I was certain the issue was with the sound board as the game didnt lose 5v with the sound board plugged in. Immediately obvious because I never considered the possibility." Mean that the display looked ok - but it was the wrong screen - which wasn't I have seen this once -īut as I said before - the DMD didn't always display properly. That could easily be the cause of all your problems. Transmitters / receivers going high or low when it shout be inactive then Where the lines are connected but no active. Lines are used for both sending and receiving and need to be switchedĬorrectly. They talk to each other via Address and Data Bus lines. "The electronics work by having three CPU's (the Main one, the Sound and theĭisplay). I replaced all fuse holders on the flipper board but that didnt make a difference.Ī friend has advised the following info which could help people in the future. I will swap the MPU with my GnR ( when I have time to move several pins to get to it!) and see if that helps.Īnyone have this issue before or suggest anything?Īfter swapping my GnR MPU and swapping the game rom the game plays perfectly except once the flipper is activated a couple of times the backgroung sound disappears but feature sounds are still tehre with alot of dino "roaring'. I suspect the MPU has an issue somewhere and a chip is dragging the 5v down but now with the new PS it is only resetting the game. The feature sounds work and the trex roaring is too regular and when the ball drains the background music reappears until the next ball launch. Now the issue is that the game resets at least once a game and the background music disappears after ball launch. Played many games without soundboard power plug in and game worked perfectly, then I plugged in the Soundboard power plug and played several games ( approx 8 games over a couple of days) without issue. I bought an Xpin power supply ( Very nice board with led indicators of all voltages) Put that in. I noticed that the 5v disappears off the MPU ( no leds lit on MPU) No sign of issues.īorrowed another sound board, plugged it in but same issue appears again. After 20mins game will start up again but issue appears again after a couple of games.ĭiscovered that game works ok with sound board power plug removed. This game worked fine until one day the game locked up, scrambled display.
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