(Topic ID: 212807)

Doctor Who Mini Playfield Issues

By whona

1 year ago

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  • 18 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by Catch86
  • No one calls this topic a favorite


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#2 1 year ago

Don't try to get it to work in play... get it to work in test first.

Check the playfield glass switch (upper left corner). If that's not working, the MPF shuts down so you don't trim your fingernails.

After that, it's most likely a connector.

Start at the motor and work out.
Check the solder joint on the motor lugs
Then check continuity on the connector wires from the lug (not solder joint) to the connector tip... c/b a wire break.
Then check continuity from the other connector to the bi-directional board.
Then check the connector on the black/red wire. It's 25 years old... Give it a good squeeze. check continuity again.. from the bi-directional board to the lug of the motor... if you're still good check for power going into the bi-directional board.

Here's a few things to try, easy to hard.

#4 1 year ago

Go into the diagnostics and run a switch test. You should get familiar with doing these tests and if you have not run through every test in the system. Lamps, flashers, solenoids and switches. These tests are basic diagnostics that rely on reading provided instrumentation or watching a triggered event.

Test all of them, including the hard ones to get to. You should use a ball rather than a finger to set off ball switches. Sometimes a switch can settle from the playfield. Thus your finger can push down further to activate but a ball cannot. The glass switch obviously does not need a ball but should be triggered by the glass passing over it. Another reason to test ALL the switches is to catch a potential switch matrix issue. Several switches will stop working and it's due to a breakdown in the matrix (more advanced).


#8 1 year ago

You need to run the switch tests and test14... I did not see where you said that worked.

After that...

I get you put a battery on the connector, but you need to be methodical about the processes. Plug the connector in and check the continuity from the Bi-directional board.


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