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Weller WCC100 soldering station

Discussion in 'Electronic Repair' started by gb, Dec 29, 2007.

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  1. gb

    gb Guest

    This is an informational post for owners of the Weller WCC100 soldering
    Some Elecraft builders have used this soldering station for building their

    This is the BLUE colored station that was sold by Weller until 1999, when it
    was discontinued

    The Weller WLC100, which is an ORANGE colored station, is a totally
    DIFFERENT station.
    The WLC100 is NOT temeprature controller uses an OEM light dimemr module)
    and uses the Weller "ST" series of soldering tips. Information on the
    WLC100 model, can be found here:

    The Weller WCC100 is a temperature controlled soldering station that Weller
    sold in 1990s,
    until it was discontinued by Weller in 1999. I have found some vendors that
    still have a few of these stations in stock. The WES51 soldering station,
    introduced in 2002 replaced the WCC100 model.
    The WCC100 station uses the Weller "ET" series soldering tips, which are
    readily available and used on a number of current Weller soldering stations
    (WES51, EC series, Silver Series).

    I am collecting pertinent documentation for this Weller station (including
    the Tech Sheet) that will eventually be available electronically (likely
    through BAMA).

    The WCC100 soldering station is a line voltage (120 VAC) station.
    This station has NO isolation transformer and the control board is connected
    directly to line voltage (no fuse, surge protection or safety capacitor).
    The control board monitors the thermocouple (temperature sensor) and 120 VAC

    Parts numbers for Weller WCC100 solder station

    WCC101 - Replacement Iron w/ETA tip
    WCC102 - Replacement Heater (120 V)
    WCC103 - Temperature Sensor w/Spring
    WCC104 - Sponge
    WCC105 - Spring and Funnel Assembly
    WCC106 - Control Board
    WCC108 - Weller Barrel Nut
    SW120 - Switch (Carling LRA series illuminated rocker)
    ET series tips - widely available and used in Weller WES51, "EC" and Silver
    Series stations

    WCC102 heater has a resistance of about 348 to 350 ohms at room temperature
    (27 C)

    WCC103 temperature sensor has a resistance of about 1 to 2 ohms at room
    temperature (27 C)
    This resistance increases (thermocouple) as the temperature rises -- the
    control board then compares this to the temperature set by the user
    (potentiometer). A "zero-crossing" circuit then turns off the heater
    (usually via a Triac or transistor switch) -- when the temperature is
    reached and turns the heater back on, when the temperature drops below this

    I acquired a WCC100 soldering station, via eBay, that was non-functional in
    December 2007.
    The temperature sensor (WCC103) had failed (open - infinite resistance) in
    this station's iron. Some parts are becoming more difficult to obtain for
    this station, since Weller discontinued it over 8 years ago.

    IF you have a dead WCC100 station, now is the time to get it repaired,
    unless you are scrapping it
    (I will accept these donations).

    These Distributors have Weller WCC100 parts "in stock", as of December 2007

    Allied Electronics

    WCC103 Temperature Sensor (115 units in stock)
    Allied part number: 984-2267, price: $ 7.30
    Santa Cruz Electronics

    WCC102 - Replacement Heater (120 V) - $ 21.34
    WCC104 - Replacement Sponge - $ 1.50
    WCC106 - Control Board - $ 5.74
    WCC108 - Weller Barrel Nut - $ 7.52
    GC Electronics (available at any GC Electronics reseller or retailer)
    SW120 - Replacement Illuminated Rocker switch
    GC Electronics part number 35-3740 - $ 3.00

    Carling Curvette LRA series - LRA211C.
    LRA211: 125V Neon Lamp; 16A 125VAC; .250 QC Tabs;
    OFF-NONE-ON (SPST); Red Transparent, Black bezel.

  2. gb

    gb Guest

    The Weller WCC103 temperature sensor is actually an iron-constantan
    thermocouple (possibly Type J), although Weller used Type K thermocouples
    for its EC station series .
    Sensitivity believed to be about 50 µV/°C
    The relationship between temperature and voltage produced is NON-Linear.

    What is a thermocouple sensor?
    A thermocouple is a sensor for measuring temperature. It consists of two
    dissimilar metals, joined together at one end. When the junction of the two
    metals is heated or cooled a voltage is produced that can be correlated back
    to the temperature. The thermocouple alloys are commonly available as wire.

    When replacing the WCC103 sensor the leads MUST be correctly installed or
    the iron stays on continuously and eventually overheats.
    The Iron (magnetic) lead connects to the RED wire
    The Constantan (copper-nickel alloy/non-magnetic) lead connects to the
    YELLOW wire

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