Buttons going bad on RH Designs Zonemaster II

Discussion in 'Darkroom Equipment' started by Dave Krueger, Aug 16, 2014.

  1. Dave Krueger

    Dave Krueger Member

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    Does anyone have any experience with intermittent buttons on the Zonemaster II? I have one button that clicks, but doesn't actually do anything unless you push on the upper right corner of the button. Obviously, the simplest solution would be to send it back to RH Designs for repair, but it's about 8 months past the warranty expiration and I want to make sure there is nothing I can do to repair it myself. I really don't want to send it back to the UK for repair and be without the meter for weeks if I can avoid it.

    Membrane keyboards are common and there is some info about repairing them on the web, but I'd be interested in hearing of anyone has actually repaired the keypad on the Zonemaster II.
     
  2. JackRosa

    JackRosa Member

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    RH Designs sold to another company. You can look them up on the internet. My experience with them is that they are good guys. If you explain the issue to them they may give you a break on the cost of repairs, even though your unit is out of warranty. If you try to fix it and mess it up, you are in for full price of repair. I suggest you e-mail them and ask them for their suggestions. Also, th fellow who owned RHD is a greta guy and a knowledgeable source. I am sure he would reply to your e-mail. (Internet search will yield his name/contact info)

    Hope this held.
     
  3. silveror0

    silveror0 Member

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    His name is Richard Ross. Email address is: richard@rhdesigns.co.uk

    He responded to a question I had in April of this year. I believe all or most of the RH Designs equipment are his designs.
     
  4. Dave Krueger

    Dave Krueger Member

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    Thanks for the replies, guys.

    I took it apart and it turns out the buttons consist of discrete switches rather than a membrane keypad. The button in question just had a cold solder joint. After resoldering, it works great. It's actually kind of nice to know I can replace the buttons myself if they ever go bad.
     
  5. john_s

    john_s Member

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    Good to know. Thanks.
     
  6. PKM-25

    PKM-25 Member

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    Very good to know, thanks!
     
  7. JackRosa

    JackRosa Member

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    Absolutely . . . this is good to know! Thanks.
     
  8. SMBooth

    SMBooth Member

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    Switches are available from RS (components) I can post the part number if you need. Easy to replace if you had to.
     
  9. JackRosa

    JackRosa Member

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    Part numbers would be appreciated. Thanks in advance.
     
  10. resummerfield

    resummerfield Subscriber

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    Thanks for this info!
     
  11. SMBooth

    SMBooth Member

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    The buttons and switches are made by Marquardt in Germany. The relevant part numbers are: Switch: 6425.0101 Keytop: 825.000.031.
    The RS Components part number for the switch is 607-7810 and the keytop (cap) is 607-7826
     
  12. Dave Krueger

    Dave Krueger Member

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    Thanks for the info!
     
  13. JackRosa

    JackRosa Member

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    THANKS FOR THE INFO

    THANKS - most useful information.
     
  14. Mark_S

    Mark_S Subscriber

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  15. john_s

    john_s Member

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    Thank you Shane.
     
  16. JackRosa

    JackRosa Member

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