(Topic ID: 326418)

Harlem globetrotters pinball random pop bumper lock

By martymart

1 year ago



Topic Stats

  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by BigAl56
  • Topic is favorited by 1 Pinsider

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#1 1 year ago

I am currently working on a Harlem globe trotter pinball and the pop bumper solenoid randomly locks on and blows the fuse. It can either blow when the machine is turned on or after 2 - 3 hrs.

The pop bumper also has locked in attract mode approximately 15mins after the last game. All coils look to have the correct resistance and I cannot find any shorts.

Has anyone seen this before and have any advice on what I should be looking at. All the transistor on the driver board is ok and test correctly.

#3 1 year ago
Quoted from slochar:

Always the same pop or different ones? Do you have another SDB to swap in to test? Does it consistently do it I know the time is variable but does it always do it?

It is always the same pop number. It will always do it. It may happen within minutes or an hour but will always do it.

I haven’t got a spare SDB board although I was thinking of finding one to test so I can narrow it down to a board issue or something else.

It is like something is starting to fail although has not yet failed completely.

#5 1 year ago
Quoted from slochar:

If you have spare tip 102 maybe just replace that one even though it tested good... The test isn't hundred percent accurate on saying it's good. It's very accurate when it's shorted.

Think I will do that and see what happens.

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