Alright so it all started with the scoop switch going out. I replaced that. Then... the game would no longer shoot a ball into the shooter lane. replaced that coil. then i got the infamous missing 6 balls Q54 transistor issue. I replaced the switch at the end of the ball trough, replaced all of the ball trough switches and added new diodes, and checked all solder joints. Made sure my coil on top of the trough had tape blocking the nut so i wouldnt short anything. replaced Q54. Boom all my switches worked again. Hooray. But my ball to shooter lane coil still wont work and now neither does the coil on the scoop.

Any ideas what I need to look for now? I have spent so much time trying to get this damn game back up and running, i will try anything that may work

The coil under the left scoop fires in testing but the coil that shoots the ball into the shooterlane does not. Also, now the coil on the left scoop fires a bunch while the startup trex test takes place.

So i did find a loose wire, and when i ground it to a close switch the dmd says its related to the trough. any idea where this wire goes? Im consulting the manual right now, its white with a red strip by the left side just past the scoops

jploosewire.jpg

thanks, yeah its not near long enough to have come off the trough. all my trough switches fire but the 3 spitter targets dont. so it is tied to that i think, but no matter where i place it i cant seem to get the spitter targets to work. On the switch matrix it looks like it should be Spitter Target #2 middle, but that one already has wires on it so i am confused.

My main issue is not having the coil shoot the ball into the shooter lane. Is there a place I need to start with that? It seems from what ive been reading it could be 1 of many TIP120/122 transistors on the board. I am going to see if I can trick the coil into firing by hooking an alligator clip to the ground by the prop rod and then the other end on the ground lug on the coil after work.

Okay thanks for the responses.
So tested all the fuses on my DMM and they are all good
I jumped the coil and it fires so thats goodish news. Seems like i could have another transistor out on the board maybe.
I am about to find where that wire goes and hook it back on and see what happens
Thanks for the replies!

so no matter where i place the wire i dont get the spitter targets to work. it does however activate 1 trough switch, but now i have another trough switch out again... brand new switch and diode and diode tests good.

if anyone with a JP could take a picture of the wiring on the 3 spitter targets that would be fantastic!

so two of the 3 spitter switches only have 1 wht-red the other one doesnt have any wht-red... i just press it on all 3 during switch test and cant really determine which is correct as no position makes the spitter targets work

if anyone could supply me with a picture of the correct alignment that would be fantastic

Cool man thanks for the input,I'll keep plugging away

Yeah i think you are right. I am kind of color blind and they looked the same haha. I will solder it back to the middle target after work and then check further down the chain and see what else is off as another one of my trough switches isnt working again. they all worked when i replaced the Q54 and they are all new and the diode tests fine still so i must have more wiring issues.

so i soldered the wht/red back in the correct spot. Spitter targets dont work. coil to the shooter lane doesnt fire. trough switch 4 doesnt work but all other trough switches work. cant seem to see any other wire issues

q29 tranisitor (L/R relay) fires when jumped. ball to shooter lane coil fires when jumped. Q54 transistor tests fine. Q29 transistor tests fine

you guys are right, nothing in column 4 is working. raptor pit, t rex left and right, and the 3 spitter coils. time to look for more wiring issues! thanks

yeah it looks like i need to check Q52. I have more transitors in the mail, unfortunetly i bought the last one my electronics store had when i repalced Q54.

i have 1 electronics place around here that i bought their last one unless radio shack carries them. I could check there i suppose, i try and avoid it hah

Alright, radio shack had the transistors
replaced it
all switches work now!

Coil still doesnt fire the ball into the shooter lane. seems all other coils work in test. if i ground that coil it will fire so it is getting power

all trough switches work. the ball serve coil, if thats the one on top of ball trough under the apron, that one does work. The one that shoots the ball into the shooter lane is the one I cant get to work. Game starts fine after the t rex test, then i hit start and it cant fire the ball up then it says 1 ball missing or more and does a ball search and never finds it then it clicks another ball to be shot up and it now is missing that ball ha.

that end of trough switch works and i have replaced it in this process. it works in switch test. when pressed when the ball in "served up" the coil still doesnt fire.

The coil doesnt fire in test mode only if i jump its ground to make it fire, that is the only way i can make it fire. Also, now during the T rex test on boot up the left scoop coil fires a bunch randomly, not sure if this is related.

I can re-adjust that switch at the end of the trough and see if i can make it more sensitive to fire hair trigger style and see if that makes a difference

im guessing i need to replace the transistor that is associated with this coil, i have some in transit from marcos

Thanks again for all of your input, i really appreciate it. this is the first game ive had to bring back to life lol so its all new to me

thanks, i ordered 10 Tip102's so hopefully i have enough to fix the remaining issues

how do i determine which specific transistor is responsible for that coil? I just have been reading the manual online, the schematics are kinda blurry trying to follow the lines back to the board

Alright
So i replaced the Q45 and voila! The coil is back in action!
But now Im getting the "6 balls are missing" error again
Could my Q54 blown again already?
the switches work in the switch test in diagnostics which makes me think it must be something else. sometimes it says 6 balls missing sometimes it says 1 ball missing but they are all there and cant start a game

HELL YEAH I LOVE YOU GUYS!
I got it working, i replaced the diode on trough 4 switch and we are back in business!!!!!!!! SO HAPPY
EDIT: DAMNIT DIDNT LAST LONG
played a game and got the ball in the left scoop and it didnt fire it out then said 6 balls missing. NOOO
edit2: Looks like my issues are the left or right scoop (not the bunker) isnt working and i forced the game into multi ball. It will give me the 3 in tri ball but i couldnt get chaos to go unless I used the smart missile. The switch on the ramp works and gives points but doesnt count for the O in CHAOS and i dont think it gave me the jackpot, but I didnt get it to fire all 6 balls in the game when i forced it to give me 6 ball multiball. Also, when i go into the control room it gives points but didnt start a game mode.
That was my original issues before all these other things arose. I replaced that switch and diode already. Again, they all work in the switch test.

Also my trough switches dont seem sensitive enough, how do I adjust these? i tried screwing them in at the steepest angle, not sure what else I can do with them

Thanks again guys!

edit double post sorry

Alright so i replaced Q51 and Q48 just incase and did not change anything.
I'll do more testing of switches tomorrow. How do you adjust the trough switches to be more sensitive?

Okay I will do that after work.
I am more concerned with the Control Room / Bunker issue. This was my initial issue with the machine then all this other crap started happening when I replaced the Control Room switch and diode. The bunker coil doesn't fire when the ball is on it and the control room switch gives points but it doesnt activate game modes. That seems really odd and since I replaced their transistors im guessing its a switch/diode/wiring issue with those guys. I'll dig in more after work.

edit: I wonder if my diode on my control room switch is on the correct way, does anyone know which side the banded side of the diode goes on?

So I got replacement switches and diodes for the bunker and control room.
This is how i wired them, according to the manual the band of the diode should be on the right, the switches I replaced were on the left... so not sure which is correct.

Now the control room switch registers points in game but doenst start game modes (same issue)
The bunker switch seems to be activating the dino dna ramp stuff and going crazy when the game is on.
If the ball goes into the control room it doesnt fire out of the bunker until the ball search tries to find it.

Is this wired correctly?

bunker.control.switches.jpg

Alright thanks for the reassurance on those switches. Here are the switches in that column that are firing for 2 things:

Row WHT/BRN * Column GRN/BLK - Right Ramp Enter / also triggering Trough 1
Row WHT/VIO * Column GRN/BLK - Herrerasaurus Top / also triggering Trough 7
Row WHT/GRY * Column GRN/BLK - Brachiasaurus Low / also triggering Shooter Lane

These are all related to the Q54 Column of GRN/RED

All GRN/RED switches only fire their respective switch on the column.
Does this mean I need to search out all the GRN/BLK column wires to look for an issue?

Okay, I will try this on my lunch break and report back. Won't have time to check wires again till this afternoon after work