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Checking for Breakage of the Heating Element and Cord Assembly
Disconnect the plug and measure the
resistance
value
between
connecting plug pins as follows.
If the values of 'a' and 'b' are outside
the above value, replace the heating
element
(sensor)
and/or
assembly.
Refer to procedures 1 and 2. If the
value of 'c' is over the above value,
remove the oxidization film by lightly
rubbing with sandpaper or steel wool
the points as shown.
1. Broken Heating Element
Heating Element (Red) Sensor (Blue)
the
cord
Disassembling the soldering iron (handle)
1. Turn the nut (1)counterclockwise and remove the tip
enclosure (2), the tip (3).
2. Turn the nipple (4) counterclockwise and remove it from
the iron.
3. Pull both the heating element (6) and the cord assembly
(11) out of the handle (12). (Toward the tip of the iron).
4. Pull the grounding spring (5) out of the D-sleeve
Measure when the heating element is at room temperature.
1. Resistance value of heating element (Red) 2.5-4.0Ω.
2. Resistance value of sensor (Blue) 43-58Ω
If the resistance value is not normal, replace the
heatingelement (Refer to the instructions included with
thereplacement part.)
After replacing the heating element,
1. Measure the resistance value between 1) pins 4 & lor 2 2)
pins 5 & 1 or 2. If it is not ∞, the heating element and
sensor are touching. This will damage the PCB.
2. Measure the resistance value 'a', 'b', and 'c' to confirm
that the leads are not twisted and that the grounding spring
is properly connected.
9
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