Checking For Breakage Of The Heating Element And Cord Assembly - aoyue 937 Plus Instruction Manual

Checking for breakage of the heating
element and cord assembly
a Between pins 4 & 5 1.7-1.9 (Normal)
b
Between pins
1 & 2(Healing Element)
18-20 (Normal)
c Between pins 3& Tip Under 2
Disconnect the plug and measure
the resistance value between the
connecting plug pins as follows,
If the values of 'a'and 'b'are
outside the above value, replace
the heating element (sensor) and /
or cord assembly. Refer to
Procedures land 2.
A. Broken Heating Element
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) 2.5-3.5Ω.
2.Resistance value of sensor (Blue) 43-58Ω
If the resistance value is not normal, replace the heating clement.
(refer to the instructions included with the replacement part