MC-60 Motor Controller repairs (D3 & D4)

Discussion in 'The Projects Forum' started by WRAMBHAROSE, Oct 27, 2010.

  1. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    Hi,
    I am having problems with identiying two diodes D3 and D4 on this board.
    The Controller MC-60 is from a Threadmill Proform 400CW.
    The cuircuit board is the same as previous post.

    A lizard crawled in an shorted them out, now I need to replace it.
    They are burnt beyond recognition.
    Your help to identify these components values would be greatly appreciated.

    Wayne

    Trinidad & Tobago
    Caribbean
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Greetings wrambharose,

    Here at AAC we frown on the practice of hijacking.

    In the future, please start you own thread even if there is a thread that already exists on your topic. This will avoid confusion between members with different solutions to a similar problem.

    hgmjr
     
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  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    How about taking a picture of the board and the diodes and attaching them to a post here? Many of our members can make an educated guess at the part provided the image is clear and the markings on the part is clearly viewable.

    hgmjr
     
    WRAMBHAROSE likes this.
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    If I remember correctly from another thread, the diodes were D4020.
     
    WRAMBHAROSE likes this.
  5. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    Thanks all,
    Sorry, I am new to the protocols.

    I dont believe these are the same diodes (D4020)
    I am posting a photo of the board its the D3 and D4 diodes at the front.
    Any help to spec them for replacement would be greatly appreciated.

    MC-60 Motor Control Board

    [​IMG]
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Unfortunately, your attachment did not work.

    Use the "Go Advanced" button below, then click the "Manage Attachments" button to display a pop-up window to navigate to files on your hard drive.

    Please note that there are size restrictions in effect for various file types; and you cannot directly upload items that are not one of the approved file types; you have to .zip other filetypes.
     
  7. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    Im trying again with the Photos
     
  8. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    This is another view of the board
     
  9. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    that's a m-60 treadmill board,right?

    which part no. are u looking for?
     
  10. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    Yes its a Controller MC-60 Board from a Threadmill Proform 400CW.
    The two diodes D3 and D4 on this board are burnt and I need to identify them for replacement. Any help would be welcomed.
     
  11. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Can u show me close up of the area and from where to where the diodes are connected.
    I have something similar. May be I can figure out the parts.

    {ed}
    Are the cathode of D2 and D3 connected together with R14 & R9
    and are the anodes of the two diodes connected to AC input respectively?
     
    Last edited: Nov 3, 2010
  12. jatinah

    New Member

    Jul 26, 2010
    10
    1
    Hi There, Before you attempt to repair this PC board (PCB) please consider this.....
    The "burn" mark that you see to the right of the Tab connector on your first picture, shows "carbon burns" to the PCB. If you take a DMM, Ohm Meter, and place the leads close to each other, but not touching each other, and then set the probes into that "charred burn"(burnt fiberboard), you will see resistance, if the leads are placed close enough but not touching. This is a "carbon-path" that is conductive, and it will cause problems. You might want to find a replacement on ebay or something and discard that pcb:(
     
  13. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Slightly Burned PCB isn't much of a problem for a tech....:cool:
     
  14. WRAMBHAROSE

    Thread Starter New Member

    Oct 26, 2010
    7
    0
    Here is a close up pic showing the damage area of the MC-60 CB :(
     
  15. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    can u make the copper track how how they are connected.

    Compare tht to my previous post.
    And post back
     
  16. tvmanjon

    New Member

    Feb 5, 2010
    5
    1
    You have a number of issues there. The MOV and the diodes Those are standard 600v 1 amp diodes The board is vably damaged Traces will be missing etc get another one
     
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