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Thread: I hate myself aka RIP:Labmaster

  1. #1
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    Apr 2006
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    Default I hate myself aka RIP:Labmaster

    Ugh, so I went to test a laser, and grabbed the wrong AC adapter, instead of 9v center pin NEGATIVE (PS: FUCK YOU Coherent!!!) I put a 9v center pin POSITIVE

    poped my coherent labmaster

    had to replace some tantalum caps and got it to turn back on but it failed the self test, after some probing it seems like the 5v reg for the sensor section is borked, so ordered a new one from mouser and crossing fingers that I can bring it back to life

  2. #2
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    I feel for ya brother.

    I am working on a new invention called the "Oh Fuck Button".

    It allows you to go back in time just 10 seconds. Handy for the "Oh Fuck" moments, just reach for the button and wham, your back just before the fatal moment.
    Clinically insane.

  3. #3
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    Default

    Not just Coherent but Ophir the same... Nearly had issue with this at last LEM.

  4. #4
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    Default

    I did the same with a Coherent Fieldmaster a while back. Hopefully you'll be ok when you replace the regulator, for after putting a new SMT device in my unit it worked fine again.

    James
    Laser Safety
    http://www.lvroptical.com

    - Laser Show Safety Training, Assessment, and Realtime MPE Measurement
    - Pangolin PASS System Integrator

  5. #5
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    Default

    be sure to put a reverse diode..

  6. #6
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    Sorry for your Labmaster... And great to know that I will have to avoid using another AC adapter when I will loose the original one, or at least checking for an inverted one.

    p.s : Wayne, I'll take two "Oh fuck buttons" please, once ready

  7. #7
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    I hate mistakes but the expensive ones are always the worst.

    I wonder who it was that invented that sinking feeling?

  8. #8
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    Quote Originally Posted by sbk View Post
    p.s : Wayne, I'll take two "Oh fuck buttons" please, once ready
    I am about to test my time machine, I'll get back to you yesterday.
    Clinically insane.

  9. #9
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    Quote Originally Posted by White-Light View Post
    I hate mistakes but the expensive ones are always the worst.

    I wonder who it was that invented that sinking feeling?
    ya hopefully I can fix it because I surely cannot afford to replace it!

    and I don't even think its worth calling Coherent, they would probably just laugh if I asked for a service manual and I would probably just cry if I asked for a repair estimate

  10. #10
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    UK
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    Have faith, and with a steady hand, you'll be able to replace the regulator, getting it back up and running again. From memory it was an 8 pin SOIC so not too bad to deal with.

    James
    Laser Safety
    http://www.lvroptical.com

    - Laser Show Safety Training, Assessment, and Realtime MPE Measurement
    - Pangolin PASS System Integrator

  11. #11
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    my labmaster has no SMT parts anywhere? regulator that failed was a TO92, 5v LDO regulator... (along with a 10uF 15v tantalum cap that went short after making that impressive cloud of smoke tantalum caps make... le sigh)

  12. #12
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    so I just wanted to add an update here

    in the process of trying to find any information I created an account on coherent's website so I could find documentation... really could not find much but oh well I tried...

    couple days later I get an email from a CSR at coherent asking if I had found the information I was looking for, explained to her my situation and she told me there was no service manual available but she would forward along my email to an engineer and see if they could help me...

    so today I get an email from an engineer asking me which PCB it was so he can find the right schematics and possibly send them my way since the product is long discontinued!

    I don't know what to do, I am not used to good customer relations from large companies?! lol

  13. #13
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    Did you ever get it fixed?

  14. #14
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    ended up talking to another engineer and apparently when coherent moved most of the stuff for these old meters was lost so not even coherent can fix them anymore... only document he could find related to my old LabMaster-E was the BOM lol

    I did end up fixing mine though, I bought another LabMaster off ebay that was displaying a different error (which I correctly guessed was software related) pulled the power board out of that one and put it in mine, came up and worked perfectly!



    and it agrees with my fieldmaster



    I ended up fixing the original power board too after replacing the +5 regulator and a small 8 pin DIP switching regulator thats used for the -5V line MAX635ACPA... so now I have extra parts... I might try reading the EPROMs from the working meter and flash the EPROMs on the broken one see if I can revive it also

    as a bonus the old one had a battery in it (which is long dead) so now I know what kind of battery I need for it (a 5 cell "C" size NiCD battery)

    guy from coherent told me they sometimes offer trade-ins of old power meters towards new ones... almost considering taking the dead labmaster and trading it in for a labmax, going to see what they offer me for the dead labmaster...

    so sexy


  15. #15
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    Jan 2013
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    Bothell, Washington
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    flecom,


    Thanks for the great thread on repairing your Coherent Labmaster. It has helped me to sort out some problems I had with mine. However I still have a error message after the initial self test. I believe there is a problem with the EPROM. Is there anyway you can make a image of your eprom and post it?

    BTW my error message is 0002/2.21R

    Regards,

    Kevin

  16. #16
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    I have that same code but somethimes it starts OK, other times fails. Any help out there? Phil

    Code: 0002/2.21R
    Phil Bergeron( AKA 142laser)

  17. #17
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    Jul 2009
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    Orlando, FL
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    Quote Originally Posted by dnar View Post
    I feel for ya brother.

    I am working on a new invention called the "Oh Fuck Button".

    It allows you to go back in time just 10 seconds. Handy for the "Oh Fuck" moments, just reach for the button and wham, your back just before the fatal moment.
    Side note: The professor built this EXACT device in the final episode of Futurama! Things did no go as planned.

  18. #18
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    Quote Originally Posted by dnar View Post
    I am about to test my time machine, I'll get back to you yesterday.
    I went back in time to warn you about polarity via PM, did I save you?
    Clinically insane.

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