JOBO CPA2 Problem

Discussion in 'Darkroom Equipment' started by amellice, Feb 4, 2018.

  1. amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    Hi, I've Jobo CPA2 and it was working fine, while I was doing some RA4 prints today, suddenly the drum stopped rotating. The pump works fine, heating works fine, it's just the motor stopped working suddenly. Does anyone know what could be the problem?
     
    Last edited: Feb 5, 2018
  2. mpirie

    mpirie Subscriber

    Messages:
    275
    Joined:
    Sep 19, 2005
    Location:
    Highlands of Scotland
    Shooter:
    4x5 Format
    You will need to remove the cover from the motor and check the fuses on the controller board.

    While you are in there, try cleaning out the motor with some contact cleaner, it sounds like the load on the motor may have blown the fuse.

    Do not attempt if you are not comfortable working around electricity !!
     
  3. twelvetone12

    twelvetone12 Subscriber

    Messages:
    434
    Joined:
    Feb 16, 2015
    Location:
    Over the Alps
    Shooter:
    35mm
    How old is your unit? The motor fuse is the first thing to check. I have a very old CPA2 (~30 years old or more) and the motor would just randomly stop working. I had to rebuild all the electronics changing all the active components and all the capacitors.
     
  4. OP
    OP
    amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    I'm not really sure, I'm the second owner...
     
  5. OP
    OP
    amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    I'll give this a try, but I'm not good with electricity so if something not obvious righaway I wouldn't do it, what would be my other options? I live in California
     
  6. TheFlyingCamera

    TheFlyingCamera Membership Council Council

    Messages:
    9,983
    Joined:
    May 24, 2005
    Location:
    Washington DC
    Shooter:
    Multi Format
    First, check the serial # on your CPP - if it is below 22,000, you're likely to be due for a motor replacement, as the older models are known to have weaker motors that can't handle the weight of an Expert drum with chemistry inside. I had that happen to me with an older CPA, but it was a much more gradual decline - the motor would rotate unevenly, losing speed and picking it up again depending on the direction of rotation. That yours stopped abruptly sounds like it is a different issue, but it is still worth checking out. Also, contact CatLabs of JP - they're the Jobo distributors in the US, and they've been very helpful with troubleshooting problems when I've reached out to them.
     
  7. I have used Dave Smith in South Pasadena for help with my Jobo. I highly recommend him. He also has a supply of tank, reels and drums. http://www.darkroomdoctor.com/
     
  8. OP
    OP
    amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    Thanks, I was mistaken, it's CPA and the serial number is 13459 which according to this website http://www.jobo-usa.com/resources/faq/18-why-are-jobo-cpa2-cpp2-serial-numbers-important has the second motor upgrade
     
  9. OP
    OP
    amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    Thanks for your suggestion, he is 6 hours from my place in Dublin, but certainly an option.. But if anyone knows someone in the bay area, I'd love that
     
  10. Sal Santamaura

    Sal Santamaura Member

    Messages:
    2,840
    Joined:
    Nov 21, 2005
    Location:
    San Clemente, California
    Shooter:
    Multi Format
    Not related to Jobo motors, but you might consider changing your profile location from "New York City, USA" to "Dublin, California." :smile:
     
  11. OP
    OP
    amellice

    amellice Subscriber

    Messages:
    351
    Joined:
    Dec 12, 2012
    Location:
    Dublin, CA
    Shooter:
    Medium Format
    thanks for pointing that out :smile:
     
  12. Sal Santamaura

    Sal Santamaura Member

    Messages:
    2,840
    Joined:
    Nov 21, 2005
    Location:
    San Clemente, California
    Shooter:
    Multi Format
    You're very welcome. It's good to know where posters are located; that information frequently provides valuable context when replying.