(Topic ID: 114353)

Stargate flipper blowing fuse


By Covey

4 years ago



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  • 11 posts
  • 4 Pinsiders participating
  • Latest reply 4 years ago by Covey
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

Newbie here. Picked up a SG with some issues. Left flipper assembly was completely missing when purchased. Purchased and installed parts, left flipper button switch was also replaced. Start up and blows F22 fuse when I hit the flipper button. The flipper button does work fine when in test mode. EOS switch is closed while flipper is relaxed. Pics of wiring, not sure if I'm wired wrong? What should I check next? Any help would be great. Thanks,DSC02932.JPGDSC02933.JPG

Post edited by Covey: topic more specific

#2 4 years ago

Don't know how an original Gottlieb was wired, but when my Williams was doing the same type of thing, it was the flipper control board. I would test the transistors on the board, you may have one or more bad ones. If it is the board and you don't know how to do board work, I would see if Rottendog makes a replacement or send it to someone who knows how. Here's a link on how to troubleshoot and test
http://www.pinwiki.com/wiki/index.php?title=General#Testing_a_Transistor.2C_Silicon_Controlled_Rectifier_.28SCR.29_or_Field_Effect_Transistor_.28FET.29

#3 4 years ago

When you say the flipper button works in test mode, you do mean in switch test it recognizes the button being pressed, or that the flipper actuates in conjunction with pressing the left cabinet button? I'm unfamiliar with later Gottlieb pins, so not sure of the test section on these and whether they fire flipper coils as part of the coil test.

#4 4 years ago
Quoted from vilant:

Don't know how an original Gottlieb was wired, but when my Williams was doing the same type of thing, it was the flipper control board. I would test the transistors on the board, you may have one or more bad ones. If it is the board and you don't know how to do board work, I would see if Rottendog makes a replacement or send it to someone who knows how. Here's a link on how to troubleshoot and test
http://www.pinwiki.com/wiki/index.php?title=General#Testing_a_Transistor.2C_Silicon_Controlled_Rectifier_.28SCR.29_or_Field_Effect_Transistor_.28FET.29

Thanks, I looked at it and nothing burnt or obvious but didn't check anything with a meter. Thanks for the link, i'll start there.

Quoted from thedefog:

When you say the flipper button works in test mode, you do mean in switch test it recognizes the button being pressed, or that the flipper actuates in conjunction with pressing the left cabinet button?

The button does not move the flipper at all. The flipper is dead. The button/switch only works in test mode to scroll through the menu's.

#5 4 years ago
Quoted from Covey:

The button does not move the flipper at all. The flipper is dead. The button/switch only works in test mode to scroll through the menu's.

At this point I can't help you unless I get a copy of the schematic from somewhere, but some things to check would be:

- Flipper board fuse and any fuses on the underside of the PF
- Flipper enable relay on MPU
- Rectifier on Flipper board

#6 4 years ago

Sys3 flippers are relatively simple as they never went to a full digital flipper system, rather using a sensor board to determine when the flipper buttons are pressed.

It looks like your flipper is wired correctly, though I can't tell how the cap is wired (should be across the switch.) Assuming this is a new coil and diode from PBR. Best to check the coil resistance. Might be a bad diode or cap. Also check wiring to make sure there's no short elsewhere in the chain.

viperrwk

#7 4 years ago

Yes, parts from PBR. Have new meter on order. My POS won't let me check a diode. I'll follow up once the new arrives. Thanks for the help so far.

#8 4 years ago

You'd have to remove the diode to check it and at that rate you might as well put a new one on.

You should also check the points on the Q relay in the bottom of the cabinet. This energizes the flippers (and the other interactive playfield coils like slings and pop bumpers.) While this is probably not the issue it's always good to check this relay on any new machine/shop job.

Coil resistance, diode, cap, including where it is hooked up and wiring. Has to be one of these.

viperrwk

#9 4 years ago

I did look at the Q relay. It looks to be functioning, however I have not metered anything. Checked the switches to make sure they were opening and closing with the coil operation. Both slings are dead also. (Both coils melted plastic sleeves inside). Has me thinking there could be a connection if the Q relay fires both slings/flippers?

#10 4 years ago

The Q relay provides power to the two pop bumpers, two slings and three kicking targets as well as to the flippers. One set of points feeds the right flippers, the other set of points feeds the left flipper and all the aforementioned (though the points are bridged on the relay side).

If both sling coils melted, you may have a short somewhere else that could be causing your flipper and sling problems.

viperrwk

Stargate playfield coil schematic

1 month later
#11 4 years ago

Update... Shorted diode on flipper coil. Replaced and now it's going. Thanks for pointing me in the right direction. Still have to deal with the dead slings. I'll start a new post for them

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