(Topic ID: 262349)

D1 Diode f14 flipper board


By johnny77

11 months ago



Topic Stats

  • 13 posts
  • 7 Pinsiders participating
  • Latest reply 11 months ago by johnny77
  • Topic is favorited by 1 Pinsider

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    C-8938 vs C-9939.png
    20200219_162358 (resized).jpg
    Screenshot_20200217-111704_Drive (resized).jpg

    #1 11 months ago

    I checked the d1 diode on the f14 tomcat flipper board and it reads continuity in both directions. Thats not right is it?

    #2 11 months ago
    Quoted from johnny77:

    I checked the d1 diode on the f14 tomcat flipper board and it reads continuity in both directions. Thats not right is it?

    Nope it's not. It's gone, you can bury it and find its replacement!

    #3 11 months ago

    I was gonna say, they should test and only be 1 way, but some parts should be tested out of circuit. Sounds like confirmation above that a diode is fine to test in circuit.

    #4 11 months ago

    I don't own F-14 so I've only looked at the manual but I don't see a "D1" on either the board layout or the wiring connections in the manual. Of course, Williams manuals are known to have errors in them.

    #5 11 months ago
    Quoted from DumbAss:

    I don't own F-14 so I've only looked at the manual but I don't see a "D1" on either the board layout or the wiring connections in the manual. Of course, Williams manuals are known to have errors in them.

    Screenshot_20200217-111704_Drive (resized).jpg20200219_162358 (resized).jpg
    #6 11 months ago

    D1 looks like a zero ohm resister/jumper. But I could be mistaken. Test the bridge rectifier just below the blown fuse.A bad bridge would blow it for sure.

    #7 11 months ago
    Quoted from mikat11:

    D1 looks like a zero ohm resister/jumper. But I could be mistaken. Test the bridge rectifier just below the blown fuse.A bad bridge would blow it for sure.

    That is a zero ohm jumper

    #8 11 months ago

    Maybe D1 on the board is W1 on the diagram shown above. Seems that it would be there to power all the flippers.

    #9 11 months ago

    So i tested bridge. Black lead to the + and red lead to - and i get 1.942

    #10 11 months ago

    It's from WPC repair but the methodology applies here.

    https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Failed_Bridge_Rectifier

    #12 11 months ago

    That explains why there is a jumper installed in place of D1.
    Williams re-used the PCB of a 'hyperball' motor+coil drive with less and other components for a flipper supply:

    C-8938 vs C-9939.png

    #13 11 months ago

    Zaza, i guess that does explains it. Thanks

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