Replacement lockout key cards are no longer available for the 939, 929 and 927.
NOTE: The following information is provided as-is and is not supported by Hakko. Modification of any Hakko product will void the warranty.
To disable the temperature lockout feature on the 939, 929 and 927 station:
- Remove L6 from the sensor board inside the unit and place a solder bridge between the pads. This will cause the temperature controller to permanently read as through a key card has been inserted and allow the temperature to be changed.