Weller WES51

Discussion in 'General Electronics Chat' started by Dr.killjoy, Jan 13, 2014.

  1. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
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    I just got my weller wes51 today and she is pretty nicee..:D:D:D:D:D:D
    But I wanted to know if there is a way to test the unit without a Iron ???
    Are there any problems with these units ???
    What tip do you guys use and the reason I am asking I am use to hakko tips..





    P.S.
    My hakko took a swan dive and broke the whole case and now the only thing left it the circuit boards which still works but looks funky trying to use .... RIP Hakko 939



    Thanks
    Jason SR
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,013
    1,531
    Why not get a broken one from Ebay and put your "guts" in a different case? When I was looking, there were quite a few listed as "not working, for parts only". And the cases look good.
     
  3. radiohead

    Active Member

    May 28, 2009
    474
    31
    No. You cannot test the unit without the proper iron connected.

    The Weller WES51 is an excellent unit. However, I had some issues and recommend some fixes for the WES51. If the iron is left on for a long period of time without use, the pencil heating element may burn out, so turn it off when not in use (30 min or more).

    Another issue is if the unit will not power on, remove the rubber feet on the bottom, as well as the four captive screws. When the unit is pulled apart, you will see the circuit board in the unit. Look for F1 fuse. It is the solder-in kind, but a standard buss fuse will work if you solder leads on it from a resistor or something similar.

    The iron to use with this unit can be obtained form Grainger.com:
    PN: 1UNE4, Soldering Pencil, Replacement Iron, 50W

    Replacement tips are also available from Grainger:
    PN: 1UNG1, Soldering Iron Tip, Screwdriver, 2.4mm
    PN: 1UNG2, Soldering Iron Tip, Screwdriver, .8mm
    PN: 1UNG7, Soldering Iron Tip, Screwdriver, 1.6mm
    PN: 1UNG8, Soldering Iron Tip, Conical, .8mm
    PN: 1UNF8, Soldering Iron Tip, Long Conical, .4mm
    PN: 1UNF9, Soldering Iron Tip, Long Conical, .8mm

    For proper tip cleaning, use:

    PN: 1UNG3, Soldering Irong Tip Stand
    or the inexpensive alternative: a chore boy metal scrubber pad stuffed in an ashtray.

    I hope this helps. - Radiohead
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
    970
    Is it used or something?
    Whats the point in "testing" a new soldering iron.. Especially one from Weller or other known brands..
     
  5. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
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    I tired plugging it in and the led light ups green which I guess is a good sign ....

    I have looked too ,but the price of a broken unit is about the same price as a new soldering station .. I picked up the Weller wes51 base unit for $12 plus shipping ... So now I am not sure what to do with the hakko 939 and plus I really don't have the time to rebuild a case or really play with it since I need a station to make money and work on my projects and right now I am without a soldering station till I can afford a new iron for the station..

    It is new to me and it was listed broken without a iron ... When I received it the unit was super clean and never seen any real use or if any ..



    Thanks and I did some research my self and found the fuse and will check it out later ..
    This really helps with all this info Thanks Guys






    Thanks Again
    Jason SR
     
  6. elec_mech

    Senior Member

    Nov 12, 2008
    1,513
    193
    This is the iron I use and I love it.

    I agree, shut it off if you won't be using for awhile. It does have an automatic shutoff of 99 minutes if not used, but I wouldn't rely on that nor would I want to leave an iron on unused for 99 minutes.

    Per the user's manual:

    When you turn on the iron, the LED will be a solid green indicating there is power. The iron will heat up to the temperature you set it at. It is ready to use once the LED is flashing.
     
  7. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    1,190
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    The led will still turn green without the iron be attached??
     
  8. elec_mech

    Senior Member

    Nov 12, 2008
    1,513
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    As radiohead said:

     
  9. radiohead

    Active Member

    May 28, 2009
    474
    31
    See attached pics for details on where the fuse is located as well as how to install a field-expedient replacement fuse. Use 125V 4A fast blow fuse.
     
  10. Swixtt

    New Member

    Jan 25, 2014
    1
    0
    hello, i'm a newbie on the forum here. just got a new to me 51 and it is dead. I was given it and wanted to see what was wrong with it. so I took it apart and see that the fuse is good. I do not see any voltage from the transformer though:(
    would this be something easily obtained? and if so, any idea where? is it common for this type of failure after only 15min use? apparently that is all that is on it for hours!!
     
  11. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    1,190
    156
    How did you check it ???
    Did you check the transformer was receiving voltage???
     
  12. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
    1,190
    156
    What is the gold piece in the middle ???


    [​IMG]
    [​IMG]
     
    Last edited: Jan 30, 2014
  13. flynhigh

    New Member

    Nov 24, 2016
    2
    0
    Hi,

    Have you solved this only high temperature setting works issue?
    Mine is doing it and did multiple testing based on the manual, "https://www.scu.edu/media/school-of...-lab-resources/Manual_WellerSolderStation.pdf"
    Below is the test result.

    Base Check
    1. With line cord unplugged and power switch on, check for approximately 21 ohms at line cord blades
    - PASS
    2. With line cord plugged in and power switch on, check for 24VAC ±10% between pins #2 and #6 of tool receptacle
    - 4.2VAC (#2 & #3 - 27.84VAC, #2 & #4 - 27.84VAC)
    3. Check transformer secondary for 24VAC ±10% - 27.84VAC
    4. Check wiring from tool receptacle to printed circuit board
    - #2-red(bottom), #3-orange(2nd from top), #4-yellow(3rd from top), #5-ground, #6-red(top - J1)
    5. Check for continuity from pin #5 of tool receptacle to line cord ground pin
    - PASS

    Tool Check
    1. Check heater resistance from pin 2 to pin 6 (see Figure 1) of the tool connector, should measure 9 - 11 ohms
    - 10 ohms
    2. Check sensor resistance from pin 3 to pin 4 of the tool connector, should measure 1 - 2 ohms
    - 2.3 ohms
    3. Check resistance from pin 5 of the tool connector to tip, should measure 2 ohms maximum
    - 0.4 ohms

    One thing that's odd to me is #2 & #6 pins measured only 4.2V while #2 & #3 or #4 measured 27.84VAC.
    Is this wrong?
    The wire connections seem correct.
    Can anyone help on this issue?
     
  14. JohnInTX

    Moderator

    Jun 26, 2012
    2,346
    1,029
    Welcome to AAC!
    It's normally discouraged to restart a thread but since it is a continuation of the old thread it may proceed.
     
    GopherT likes this.
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