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Thread: How to open old Gralab 450 for repair?

  1. #11

    Join Date
    May 2015
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    SooooCal/LA USA
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    2,104

    Re: How to open old Gralab 450 for repair?

    Quote Originally Posted by LF_Alex View Post
    It will cost about 2 or 3 times more to get them repaired by Gralab, compared to buying one from eBay
    Did 'ya at least ask, or for some advice???

    Tell 'em you're not happy, and will post your woe online if they won't satisfy your service question... ;-)

    Usually all contacts need to be cleaned in timers, and sometimes the switching relay need service or replacement eventually...

    Steve K

  2. #12
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    15,377

    Re: How to open old Gralab 450 for repair?

    Best idea so far

    Quote Originally Posted by Eric Woodbury View Post
    I'll guess that the screws that hold the case together are under the rubber feet.
    2022

  3. #13

    Join Date
    Apr 2019
    Posts
    20

    Re: How to open old Gralab 450 for repair?

    I was able to gently pull those handles from rotational switches, there was no glue! 4 screws on the bottom - and I got it opened!

    I'm going to spray/soak those switches in electronics contact cleaner and see if this fixes the issue. If not - will try to replace.

  4. #14

    Join Date
    Apr 2019
    Posts
    20

    Re: How to open old Gralab 450 for repair?

    Quote Originally Posted by LabRat View Post
    Did 'ya at least ask, or for some advice???

    Tell 'em you're not happy, and will post your woe online if they won't satisfy your service question... ;-)

    Usually all contacts need to be cleaned in timers, and sometimes the switching relay need service or replacement eventually...

    Steve K
    No, I didn't expect them to give me advice on fixing their timer

  5. #15

    Join Date
    Apr 2019
    Posts
    20

    Re: How to open old Gralab 450 for repair?

    I got it fully disassembled, cleaned switches with Electronics Contact cleaner. Looks like they are working much better now.

  6. #16
    jp's Avatar
    Join Date
    May 2009
    Location
    Maine
    Posts
    5,389

    Re: How to open old Gralab 450 for repair?

    These 450/451 timers are a big step up from the gralab 300 if anyone actually wants to operate an enlarger or UV box. It's nice to have it repeatable compared to winding a dial of the 300. I use two (one for enlarger, one for uv box) and also have a spare. All patient ebay or forum finds.

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