T2 gun does not work


By jeffman855

3 months ago


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  • 28 posts
  • 4 Pinsiders participating
  • Latest reply 3 months ago by mschonbrun
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20171218_170022 (resized).jpg
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#1 3 months ago

The gun (the one that swings out and shoots the ball onto the playfield) motor on my T2 does not work. In test mode I have tested the voltage at the motor (12v DC from what I could tell in the manual) and it comes up as not having voltage at all. Where should I look next? Thanks for the help

#2 3 months ago

Look in the schematic/manual and find which fuse controls the 12V feed to the meter, pull it and check it with a meter set to continuity.

#3 3 months ago

Alright, I pulled F115 and F116 fuses off of the power driver board and tested them and they both tested fine.

#4 3 months ago

check the board that drives the gun under the gun. sometimes a leg can break free on the white ceramic block...i forget if it is a resistor or what.

#5 3 months ago

do you have power coming into your motor board? you should have 20v coming in at j1.

#6 3 months ago

I do not have 20v coming into J1. I looked on the power driver board (it's a rottendog power driver board if that makes a difference) and the Led indicating 20v is also not lit up on the power driver board.

#7 3 months ago

f111 is your fuse for br4 that powers your 20v. on pin 5 of j107. do you have flash lamps?

#8 3 months ago

I do not have flashers. I checked that fuse at f111 and it was blown. I replaced it with a new fuse and it blew again as soon as I turned the game on.

#9 3 months ago

test br4

#10 3 months ago

or pull j106 j107 and j108 off. replace the fuse and power it back up and see if the fuse holds. to see if its a board prob.

#11 3 months ago

Sorry, what/where is br4?

#12 3 months ago

bridge rectifier. its the big square metal block by the big caps.

#13 3 months ago

nevermind i looked up the rotten dogg board. it uses a diode array. easy to check use your mm on diode function and check to see if you have any shorted out.

#14 3 months ago

I have couple pictures of my ss when my controlled lighting failed

20171218_170004 (resized).jpg

20171218_170022 (resized).jpg

#15 3 months ago

Thanks for double checking, I was really scratching my head looking for any bridge rectifiers on the board.

Alright, so I tested all of these diodes and they all seemed to read at around .450v with the black lead on the left and the red lead on the right.

#16 3 months ago

Did u unplug those connectors and try it?

#17 3 months ago

Okay, I pulled j106 j107 and j109 off and the fuse held. There is nothing plugged into j108 on T2 so I pulled j109 instead (just a guess)

#18 3 months ago

Bump. Thanks for the help so far guys

#19 3 months ago

I wish i had my game at home. you should be able to plug 109 and 106 back in. and give that a shot.

#20 3 months ago

Alright 109 and 106 are plugged back in and the fuse did not pop

#21 3 months ago

lets try 107 with out the motor regulator board plugged in.

#22 3 months ago

Alright I unplugged the motor regulator board and plugged 107 back in and the fuse f111 popped again

#23 3 months ago

start checking all your flash lamps.

#24 3 months ago

Alright will do. What problems would a bad coil create?

#25 3 months ago

sorry I was just looking quick at the manual. f111 drives your flash lamps. sounds like you have a shorted flash lamp socket somewhere on your playfield. I would double check them for broken wires or grounding out on some thing.

#26 3 months ago

I couldn't find any broken wires on any of the flasher sockets. On one socket one of the ground tabs was pushes over on top of where the voltage wire came in. I moved the tabs back away from each other. Not sure if that was the problem or not. Ran out of fuses to test with so I have ordered some more

#28 3 months ago

That might be it. As a result, you may have taken out a transistor. Let’s see when you get the fuse in there; watch for the flasher to get stuck on.

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