(Topic ID: 247950)

Dr Who Mini.Opto.5Bank L1 need help

By Zizzy

4 years ago


Topic Heartbeat

Topic Stats

  • 13 posts
  • 6 Pinsiders participating
  • Latest reply 4 years ago by Zizzy
  • No one calls this topic a favorite

You

Linked Games

No games have been linked to this topic.

    Topic Gallery

    View topic image gallery

    IMG_5412 (resized).PNG
    IMG_5372 (resized).JPG
    IMG_5352 (resized).JPG

    #1 4 years ago

    Hi all, I have an issue with my dr.who. I don't know if It's a issue in opto board or Opto led is really clean. L1 75 is open the others closed. When I do the test on miniplayfield ccw down the l1 is turn on with the opto eject left (at the same time). I Should know how can solve this issue. Should I disassemble the opto bank?Or not?Thanks in advance.

    IMG_5352 (resized).JPGIMG_5352 (resized).JPGIMG_5372 (resized).JPGIMG_5372 (resized).JPGIMG_5412 (resized).PNGIMG_5412 (resized).PNG
    #2 4 years ago

    On Bally/Williams games, opto's show closed when they are not active. You have a opto problem. probably a bad transmitter?

    #3 4 years ago

    probably...but if is transmitter i should disassemble the opto bank?

    #4 4 years ago

    Disassemble it and use a cell phone to check the transmitters. They will show up in a cell phone. If the phone shows it glowing then you have a receiver problem. I found in my Dr. Who that after replacing a bad one, another one went out shortly after that and then another after that and so on and so on. I finally replaced the whole transmitter and receiver board. They aren't that expensive and it's worth not having to continually take it apart to keep replacing individual LEDs.

    #5 4 years ago

    Reflowing the solder spots might help as well

    #7 4 years ago

    I've dr who since 4 months so this is my first issue. I Haven't disassemble anything yet to repair. So i would like to know if I'll repair it the firs thing It's disassemble MPF and then open the Opto Boards... Have someone had my same issue?

    #8 4 years ago

    Yes they are the boards.

    I had an issue on mine and tried to change the defective transmitter/receiver, but found out the originals are shorter in length. The new longer ones then fouled on the mushroom button stalks - this is compounded if your black plastic 'board holder' bracket is warped. Ended up just ordering these:

    https://www.ministryofpinball.com/en/dr-who-5-target-opto-board-set-a-15431-32.html

    #9 4 years ago

    Cant remeber, but I think the plastic subway on the bottom of the playfiled has to come off to access the opto boards. I dont think the mini playfiled needs to come out? but I just replaced the opto's themselves, Less than than $1 apiece & its usually just the transmitters that go bad. I think the game I was working on had three out. Of course I did the work with the playfield out of the game, Made it alot easier.

    #10 4 years ago

    Now I'm Thinking to remove MPF e use a Air Spray to clean the transimetter/receiver maybe It's a bad contat?!

    #11 4 years ago
    Quoted from kguenther6:

    Disassemble it and use a cell phone to check the transmitters. They will show up in a cell phone. If the phone shows it glowing then you have a receiver problem. I found in my Dr. Who that after replacing a bad one, another one went out shortly after that and then another after that and so on and so on. I finally replaced the whole transmitter and receiver board. They aren't that expensive and it's worth not having to continually take it apart to keep replacing individual LEDs.

    Excuse me how can i use a cell phone to check the transmitters? Forgime my inexperience. I'm able to repair machine parts rather thne electric. But I should learn quickly with your help

    #12 4 years ago
    Quoted from Zizzy:

    Excuse me how can i use a cell phone to check the transmitters? Forgime my inexperience. I'm able to repair machine parts rather thne electric. But I should learn quickly with your help

    You can't see the light from the transmitter with the naked eye but the camera on a cell phone will show them lit up if they are working. Just point the camera at them and see if they are lit on the screen. If they are lit then it is the receiver that is the issue.

    #13 4 years ago
    Quoted from kguenther6:

    You can't see the light from the transmitter with the naked eye but the camera on a cell phone will show them lit up if they are working. Just point the camera at them and see if they are lit on the screen. If they are lit then it is the receiver that is the issue.

    Ok wonderfull! During this day I'll work hard to try solve the issue. Then I'll brief you. Thanks

    Reply

    Wanna join the discussion? Please sign in to reply to this topic.

    Hey there! Welcome to Pinside!

    Donate to Pinside

    Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


    This page was printed from https://pinside.com/pinball/forum/topic/dr-who-miniopto5bank-l1-need-help?hl=dent00 and we tried optimising it for printing. Some page elements may have been deliberately hidden.

    Scan the QR code on the left to jump to the URL this document was printed from.