Dead Jobo CPA 2

Discussion in 'Darkroom Equipment' started by markbb, May 14, 2006.

  1. markbb

    markbb Member

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    My processor just died! I've taken the lift unit off and removed the motor unit and taken off the cover. I can see two fuses (filament in clear glass containers), neither of which appear to have blown. There's no evidence of any thing else burnt out - no markings smell etc., it just don't go! anyone got any experience of these - any obvious things to look for?
     
  2. hka

    hka Member

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    Have you checked the thermal overload switch at the left site of the CPA. Its a small hole somewhere in the middle on the motorhouse.
     
  3. markbb

    markbb Member

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    Yes, I've tried pushing it; should it be pushed when turning on, whilst turned on - how long to keep it pushed in?
     
  4. Kino

    Kino Member

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    Try turning off the motor switch, press the overload switch and then try it again.
     
  5. glbeas

    glbeas Member

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    Also check those fuses with a meter, they don't always show when they are burned out.
     
  6. markbb

    markbb Member

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    Will do Gary.
     
  7. Jim Noel

    Jim Noel Member

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    I had what might have been a similar problem.

    I checked the fuses with a meter and found them both good.

    Then upon looking closer with a high intensity light I found that one of the fuse holders had corroded until it had separated from its base.

    With a pencil iron, I soldered wires to each end of the fuse and then to the fuse holder base, and voila - back in business.

    Good lick.
    Jim
     
  8. markbb

    markbb Member

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    I couldn't find my meter (it's been a long while since I had to use one), so I bought replacement fuses. Still no luck, dead as a dodo.

    Jim, I think yours is the next road to travel, though I'm not hopeful.
     
  9. Chan Tran

    Chan Tran Member

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    does the heating function still work? I don't think it's a serious problem. If nothing is working I would look for loose wire, corroded terminal or broken trace on a circuit board. If just the motor doesn't work I would want to verify if I have power to the motor.