(Topic ID: 284388)

Gorgar pop bumpers

By etolisano

3 years ago



Topic Stats

  • 10 posts
  • 5 Pinsiders participating
  • Latest reply 3 years ago by etolisano
  • Topic is favorited by 2 Pinsiders

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#1 3 years ago

We have a Gorgar with all new electronics installed including digital displays.
Everything is functioning properly except upon boot up 2 of the 3 pop bumpers energize and take out the 3amp slo blo on driver board.
Of course we checked to make sure none of the 2 apron contacts are making and any shorts or loose wires at base of pop bumper assembly.
Any ideas? This problem has caused us to walk away to clear our heads and ask if anyone has had a similar issue.
Merry Christmas to all!

#3 3 years ago

Could be the diode or coil itself on the pop bumper

#4 3 years ago

Last time I had a locked on pop bumper, the MPU was reading a stuck switch even with the connector removed from the driver board. The problem was a bad 6821 on the driver board.

#5 3 years ago
Quoted from dothedoo:

Last time I had a locked on pop bumper, the MPU was reading a stuck switch even with the connector removed from the driver board. The problem was a bad 6821 on the driver board.

I'm just wondering if a bad transistor would take out the 3amp slo blo on driver board?
These are brand new boards and that seems unlikely but who knows. At least it would be under warranty.
Could it be the caps on the pop bumper?

#6 3 years ago
Quoted from 2manypins:

Could be the diode or coil itself on the pop bumper

Or maybe the blue caps on bottom of bumper assembly?

#7 3 years ago

Not yet...

#8 3 years ago

Unplug the top left connector on the driver board (special solenoid switch inputs). If they still lock on the problem is on the driver board.

#9 3 years ago
Quoted from etolisano:

I'm just wondering if a bad transistor would take out the 3amp slo blo on driver board?

Absolutely. Fuse is doing its job.

Quoted from etolisano:

These are brand new boards and that seems unlikely but who knows. At least it would be under warranty.

Not if you have defective activation. It's not a manufacturing defect if the damage gets caused by the rest of the machine having an issue; that's going to vary with manufacturer and sometimes even with the retailer you buy it from. Some of the retailers will tell you to pound sand on *ANY* electronic issue after the sale.

Quoted from etolisano:

Could it be the caps on the pop bumper?

If it was shorted and caused it to lock on, yes. When you first got the board, did it work ok until one of the pops activated? It could have burned out the transistor then.

Do what Bob says regarding the connector to know for sure - you're removing the activation path from the equation. Anytime a williams special solenoid locks on at power up, it's almost always a bad transistor/predriver transistor, because the special switches aren't supposed to be active in game over mode. (That's another thing that can be bad - the activation path, but that's less common)

#10 3 years ago
Quoted from slochar:

Absolutely. Fuse is doing its job.

Not if you have defective activation. It's not a manufacturing defect if the damage gets caused by the rest of the machine having an issue; that's going to vary with manufacturer and sometimes even with the retailer you buy it from. Some of the retailers will tell you to pound sand on *ANY* electronic issue after the sale.

If it was shorted and caused it to lock on, yes. When you first got the board, did it work ok until one of the pops activated? It could have burned out the transistor then.
Do what Bob says regarding the connector to know for sure - you're removing the activation path from the equation. Anytime a williams special solenoid locks on at power up, it's almost always a bad transistor/predriver transistor, because the special switches aren't supposed to be active in game over mode. (That's another thing that can be bad - the activation path, but that's less common)

I will get on this after Christmas! Made a pledge to stay away from game until then, but cannot get it out of my mind! Thanks

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