7
Checking the heating element:
Disconnect the plug and measure the resistance value between the desoldering gun
connecting plug pins as follows.
If the resistance values of 'a' and 'b' are outside the above value, replace the heating
element (sensor).
If the resistance values of 'd' is outside the above value，Sleep mode was lose
efficacy
Replace the heating element:
1）Disconnect the power plug, wait unit the desoldering gun temperature down to
room temperature.
2）Loosen screws and disassemble desoldering gun.
3）Cut off the wire of heating element, prepare a new heating element (model no.
5SS-331N-H).as follow figure.
4）Connect heating element：
Put the heating element on the black heating element holder, insert the heat shrink
tube（Φ3x25mm）and metal tube (Φ2x6mm) to the wire, connect wire and pull the
metal tube to the connect position, crimping the metal tube with crimper tool, pull the
heat shrink tub to the metal tube and heating.
-- Long blue wire (ground) connects to the yellow wire in handle
-- Two white wires (heating element) connect to the two red wire, no need to
distinguish positive electrode and negative electrode.
-- Two blue wires (Sensor) connect to the black and blue wire in handle, no need to
distinguish positive electrode and negative electrode.
-- Any one wire connect to the Sleep control sensor
5）Measure the resistance value again, make sure the value is correct. Short the
desoldering gun nozzle and shell of plug, and the resistance value should be 0Ω.
6）Assembly desoldering gun again, do not press the wire or put into the wrong
position.
Note : The color of wire for reference, color change without notice.
Any repair or replacement operation by professional operator
a. Between pins 1 & 2
(Sensor)
50Ω±3Ω
(25℃ room temperature)
b. Between pins 3 & 4
(Heating Element)
2Ω±1Ω
(25℃ room temperature)
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