(Topic ID: 265746)

Wpc89 doctor who flashers not working

By Bospins

1 year ago

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Topic Stats

  • 17 posts
  • 7 Pinsiders participating
  • Latest reply 1 year ago by LTG
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    #1 1 year ago

    Hi friends
    I’m shopping my #dw and none of the flashers are going in test mode.

    I checked and replaced f111, which is the flasher secondary.

    Haven’t dug in beyond that yet but would love some direction on where to focus next?

    Thx gents.

    #3 1 year ago

    Thanks Lloyd

    Bulbs are all brand new.

    I’ll check the 20v stuff.

    does it matter where I pick up the ground to test? I usually just use one of the board chassis ground screws.

    #5 1 year ago

    Yeah...thanks for that...tried pushing the white door button in, no change. The door close button does trigger in the switch tests.

    All the solenoids work no problem (flippers, pops, kickers).

    Maybe the weird playfield glass switch needs to be closed also? I’ll try that too.

    It’s weird that it’s just the flashers and only the flashers.

    #7 1 year ago

    Time expander is currently out of the game and fully “expanded” for a rebuild

    #8 1 year ago

    Ok - no reading at 20v test point - tp7.

    Since f111 is new, that leaves on the bridge rectifier br4 as the culprit.

    I can’t get my probes in there to check the input and output of br4 so I’ll have to pull the board...

    Before I start doing surgery, do you guys agree?

    #10 1 year ago

    I have to pull the board to replace a header anyway.

    Thanks Lloyd and everyone else.

    #15 1 year ago

    Thanks. I’ll do some checks. Coin door interlock is working on the switch edge test so I think that’s ok.

    Testing the board components with power applied will be tough. I don’t have a test harness and getting on the pins while the board is in the game is impossible.

    I’ll do a few checks but I think pulling the board for a good look is probably the next step.

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