Safety Capacitor Question

Discussion in 'The Projects Forum' started by tcawley29, Apr 2, 2013.

  1. tcawley29

    Thread Starter Member

    Jan 23, 2013
    47
    0
    Okay so I have a treadmill which the motor is not working on. I think it may be a problem with the safety capacitor. Anyways, I think the safety capacitor is the problem because there is 235 volts ac entering the circuit board. Next on the negative lead is the safety capactior. I think this is it: http://www.ebay.ie/itm/10pcs-Safety...ultDomain_0&hash=item5644329153#ht_762wt_1037
    The next components up from the safety capacitor is four diodes for bridge rectification. Here I am only getting 3.7 volts dc.
    Would this mean the safety capacitor is the problem. All of the diodes have been tested and deemed working.
    Does this mean the safety capacitor is the problem.
    Thanks
    Thomas
     
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,647
    632
    This answer is based on an incomplete picture of your circuit. If you can post a schematic, even if a photographed pencil sketch, it will help.

    Probably not. The safety capacitor is in shunt with the input voltage and it is designed to clear any shorts it might develop.

    Can you post a schematic?
     
  3. tcawley29

    Thread Starter Member

    Jan 23, 2013
    47
    0
    Here is the schematic. Its driving me nuts as to why I cannot get this sorted.
    Thanks
     
  4. tcawley29

    Thread Starter Member

    Jan 23, 2013
    47
    0
    Anyone at all?
     
  5. ifixit

    Distinguished Member

    Nov 20, 2008
    638
    108
    Check TVS2, or the relay with your meter to see where the vpltage stops.
     
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