16
2.
When the temperature stabilizes, clean the tip with the cleaning sponge and check the condition of the tip.
3.
If there is black oxide on the solder-plated portion of the tip, coat new solder (containing flux) and then wipe
the tip on the cleaning sponge. Repeat until the oxide is completely removed and then coat with the new
solder.
4.
If the tip is deformed or heavily eroded, replace it with a new one.
9.1.3 Renew a de-tinned tip
1. Why does a de-tinned tip fail to work?
A de-tinned tip is one not wetted with solder. This exposes the plating to oxidation and degrades the heat
transfer efficiency of the tip.
2. Detinning is caused by:
(1)
Failure to keep the tip coating with fresh solder while not in using.
(2)
High temperatures.
(3)
Insufficient melting in soldering operations.
(4)
Wiping the tip on dirty or dry sponges or rags. (It should use a clean, wet, industrial grade, sulfur-free
sponge.)
(5)
There are impurities in the solder, iron plating, or on the surfaces to be soldered.
3. Renew a de-tinned tip
(1)
Remove the tip from the handle after the tip cooling down.
(2)
Remove the dirty and oxides from the tip with 80-grit abrasive polyurethane foam stock or a 100-grit
emery.
(3)
Wrap the stannum including rosin (
φ
0.8mm or larger) around the newly exposed iron surface, insert the
tip into the handle, and turn on the power switch.
CAUTION:
z
Never file the tip to remove oxide.
z
Proper daily care can prevent the tip from de-tinned.
9.1.4 Check and Replace the Soldering Iron
When there is something wrong with soldering iron, you can check and test it. If it is broken, replace the broken
element.
9.1.4.1 Check the Soldering Iron
Pull out the plug and measure the resistance value between the pins of the connecting plug when the heating
element cooling down to the room temperature.
(1)
If the values of ‘a’ and ‘b’ are different from the values in the following table, replace the heating element or
sensor or cord assembly. Refer to the following steps.
(2)
If the value of ‘c’ is over the below value, remove lightly the oxidation in the joint part of the tip and the heat
element with sandpaper or steel wool.
a. Between pins 4&5 (Heating Element)
Under 4
Ω
(Normal)
b. Between pins 1&2 (Sensor)
Under 10
Ω
c.
Between pins 3& Tip
Under 2
Ω
1
6
3
5
4
2
Summary of Contents for QUICK 713
Page 26: ...25 10 3 NK SMD Rework Nozzle ...
