The power module is an AC to DC power converter, with variable input of 100-240V and output of 24V. It supplies power to the entire printer except the heatbed.
When you are certain the power supply is not operating, or components on the power module board are burnt.
Turn the power OFF and disconnect the power cord from the power socket.
Disconnect the power cord from the power socket.
NOTE: There are a lot of screws involved in this procedure. Please label them and group them in separate sections as to avoid issues.
Remove the 10 screws and 4 screws from the rear cover shown in the picture. There are 2 types of screws, so keep them separate and remember which ones go where.
Remove the rear cover, unlock the left side belt tension ports first and then the right side one, to avoid getting stuck.
Remove 2 screws, and remove the excess chute.
Remove 6 screws, move power module protect cover to the side and disconnect the power cable of the heatbed.
Open the interface cover，loose the 3 screws to remove the 3 cables, and the disconnect the power cable to MC board.
Remove 2 screws, and then remove the power module.
Loosen the 2 screws shown, and then remove the MC board power cable.
Connect the MC board power cable to the power board module, lock 2 screws (1 screw keep loose).
Install the power board module to the inner shield, lock in 2 screws (1 screw with ground cable).
Connect the 3 cables, close the interface cover , and connect the power cable to the connector on MC board. Connect the power cable of the heatbed.
Install the power module protect cover, and lock in 6 screws.
Install the excess chute, pay attention to the buckles on the both side, lock in 2 screws.
Pass through the tube bracket and the right side belt tension port first to install rear cover.
Screw the back panel back on. Take note of the different types of screws used (10 and 4 as shown below).
Connect the power cord and turn power ON. Operate the LCD screen and start a self-test. If no errors occur, the replacement is complete and successful.
Otherwise, check all the connections and try it again. If problems still persist, contact the Bambu Lab service team for further assistance.