Can I disable the temperature control lockout card on my Hakko 939 Soldering Station? If not can I purchase a replacement card somewhere? Mine has been lost. Thanks!

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.
Posted 19 Years Ago, Updated 9 Years Ago
https://kb.hakkousa.com/Knowledgebase/10096/Can-I-disable-the-temperature-control-lockout-card-on-my-Hakko-939-Soldering-Station-If-not-can-I-purchase-a-replacement-card-somewhere-Mine-has-been-