Tech Tips

Soldering pot maintenance and inspection method

Soldering Pot Maintenance Method TOP
Case 1 Indicated temperatures are lower. Solder is not melted.
Case 2 Even if the power switch is set to ON, the unit does not operate.

Case 1-a: Indicated temperatures are lower. Solder is not melted.

Check the following points at first.

Is the parameter set correctly?

In the HAKKO FX-301, the following 4 parameter settings can be performed.
  1. Selection of temperature display °C or °F.
  2. Solder type setting
    Ex.: Sn-Pb (Tin and Lead), Sn-Ag-Cu (Tin, Silver and Copper), etc.
  3. Setting according to size of solder pot
    50-square and 75-square solder pots are available.
    Set according to size of solder pot
  4. Method to multiply timer
    1. Set the timer to "999" (9990 hours) while referring to the instruction manual.
    2. If the solder pot is perforated and it is now time to replace, press "*" to check the accumulated time.
    3. Replace the current solder pot with a new one.
    4. Set the next replacement time as predicted from the accumulated time with a timer.
    5. If the unit has been used up for the designated time, the product will inform you that the solder pot replacement time has been reached by (1) sounding an alarm, (2) decreasing the temperature and (3) turning off the power.
The details of setting method are described in the instruction manual.If the instruction manual has been lost, click on Contact Us

Is the offset value input correctly?

Adjust the offset values based on the procedure in Method for setting correct temperature.
Correct temperature setting method (offset value)
If after checking the above items, the indicated temperature is still lower or solder is not melted, the following two causes are assumed:

Cause1 : The solder pot is not firmly fixed in position.

Unless the solder pot is firmly fixed, the heating element is not fully heated. Check that the screws on the both sides of the pot are fully tightened.

Cause2 : It is possible that the heating element is broken or deteriorated.

The heating element gradually deteriorates and becomes broken with use.

If the heating element is broken or deteriorated

Replace the heating element with a new one.

Replacement method: Refer to the instruction manual included with the heating element. (Replacement can be performed without soldering.)
Necessary tools: Crosspoint screwdriver
* Purchase replacement parts from the shop where you purchased main unit.

If the heating element is not broken
Send the unit to the place of purchase for repair.
Case 1-b: Indicated temperatures are lower. Solder is not melted.
The following two causes are assumed:

Cause1 : The solder pot is not firmly fixed in position.
Unless the solder pot is firmly fixed, the heating element is not fully heated. Check that the screws on the both sides of the pot are fully tightened.

Cause2 : It is possible that the heating element is broken or deteriorated.
The heating element gradually deteriorates and becomes broken with use.

If the heating element is broken or deteriorated:
Check whether the left or right heating element is broken and replace the broken one with a new one.

1. Heating element breakage check method:
  A. Measure resistance of left and right heating elements.
  B. Replace the heating element whose resistance is infinite with a new one.
Heating element / Right: with red tubes Heating element/Right: with red tubes

Heating element / Left: with white tubes Heating element/Left: with white tubes

2. Heating element replacement method:
  Replacement method : Refer to the instruction manual included with the heating element. (Replacement can be performed without soldering.)
  Necessary tools : Crosspoint screwdriver
* Purchase replacement parts from the shop where you purchased main unit.
If the heating element is not broken:
Send the unit to the place of purchase for repair.