Weller WES51 Service Manual

Discussion in 'General Electronics Chat' started by quanttrom, Oct 21, 2012.

  1. quanttrom

    Thread Starter New Member

    Nov 30, 2010
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    So my WD1 (incorrect title !) died recently.

    I haven't had a chance to open it up yet but I am wondering if there is a service manual/schematics for it?

    The only PDF I could find has some specs and an exploded assembly view which might be good enough but having schematics would be nice.
     
    Last edited: Oct 21, 2012
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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  3. quanttrom

    Thread Starter New Member

    Nov 30, 2010
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    I just contacted them and lets hope for the best.

    I opened it up. It is a relatively simple design. There is a transformer with 12V and 24V taps(working fine) and the whole design revolves around a PIC micro controller.

    I measure the power supply rail for the uC and it seems like it has a stable +5V power supply.

    The issue is that the heating element never heats up and the display never shows anything. I believe the uC might be gone.
     
  4. BSomer

    Member

    Dec 28, 2011
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    Have you checked the connection between the soldering iron and the base? There coould be a fault there as well.
     
  5. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    the 24v ac will feed the iron heater, possibly with a triac , or it maybe dc and a pwm triac.
     
  6. paulktreg

    Distinguished Member

    Jun 2, 2008
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    Heating element OC?
     
  7. quanttrom

    Thread Starter New Member

    Nov 30, 2010
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    It seems like the Heating element is fed with a TRIAC from the 24V.

    I've tried different heating elements and none work.

    I though it may be a power supply issue because the LCD display won't display anything.
     
  8. radiohead

    Active Member

    May 28, 2009
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    I might have a manual. I will copy it, convert it to PDF and re-post in a couple days.
     
  9. quanttrom

    Thread Starter New Member

    Nov 30, 2010
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    Wow I am amazed !!! They actually send me a whole bunch of documents on it ! Including what seems to be full schematics !

    I will look at it and report back later.
     
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