The heatbed signal cable is a 6pin cable connecting the heatbed and the MC board.
1. The temperature of the heat bed is abnormal, and it has been checked to confirm that the connectors are normal;
2. The temperature of the heat bed is lost during the heat bed movement or printing;
3. Visible damage on the cable or the connector;
4. After the confirmation of the after-sales team, the signal cable needs to be replaced.
Prior to commencing with the process in this guide, please make sure the machine is switched off.
In the startup state, control the movement of the heatbed through the display screen, and place the heatbed at a height of about 2/3 of the way up. Then turn off the printer, disconnect the power cord, and remove the glass top cover. You can also place the printer on its side while it is turned off, and then pull the Z-axis belt to raise the heatbed to a height of about 2/3 of the way up.
NOTE: There are a lot of screws involved in this procedure. Please label them and group them in separate sections 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.
To remove the rear cover, it is important to first pull the right side so that the right belt tension port doesn't get in the way, followed by the right side. Push the PTFE tube outlet inward to free it from the cover.
As shown in the figure below, remove 1 silver screw with an H2.0 hex key, remove 2 black screws with an H1.5 hex key, and then remove the excess chute.
Remove the 2 screws with an H2.0 hex key, and then remove the cable railing
It is recommended to remove some silicone glue from the connector (use tweezers or a hair dryer to heat it, but do not use a heat gun), and then disconnect the signal cable of the heatbed. If the connecting cables of MC-AC are glued together by silicone, you can disconnect them together.
Carefully tear off the tape at both ends of the mesh, and then pull out the signal cable.
Unscrew 2 screws and remove the holding plate.
Use the H2.0 hex key to carefully loosen the six screws that hold the heatbed in place and lift it away from the Z-sliders. And then turn it over and place it on the bottom base.
Remove the 3 leveling nuts and rubbers, and remove the ground cable fixing screw.
Flip from left to right to open the heat bed bracket, note that there is a 2PIN cable connecting on the board, do not damage it.
Clean the silicone glue on the heatbed signal cable connector, disconnect it, and then remove the heatbed signal cable.
Pass the heatbed signal cable through the cable hole on the heat bed bracket, connect to the connector on the board, and reinforce it with silicone glue.
Set the heatbed bracket and adjust the position.
Press the heatbed bracket to to expose the studs, screw in the 3 leveling nuts one by one, trying to screw them in the same height, and then lock the ground cable.
Install the heatbed on the 3 Z-sliders, move the heatbed as far forward as possible, and lock in the 6 screws.
Put the printer on its right side, pass the heatbed signal cable through the cable hole on the rear slider, arrange the cables and press them into the cable groove of the rear slider. Then, install the cable holding plate and lock in the 2 screws.
Put the printer upright, pass the heatbed signal cable through the cable mesh, then wrap tapes on both ends of the mesh to fix it, and place the cables to the cable buckle that attached on the column.
Connect the heatbed signal cable to the corresponding connector on the MC board, enhance the connector with silicone glue, and then connect the MC-AC connection cable.
Install the cable railing to the cable cover and lock in the 2 screws with an H2.0 hex key.
Install the excess chute on the printer, paying attention to the limit buckles on both sides of the chute and install them in place, but do not press the cable.
Lock in 2 black screws on the top of the slide, and lock in 1 silver screw on the left side.
Pass the PTFE tube through the tube bracket. Next, install first the right side belt tension port and then the left side to install the rear cover.
Install the 10 + 4 screws (see picture).
Connect the power cord and turn on the power.
Run a Device self-test operation as shown below, and if no errors occur, the replacement was successful.
Should you come across any issues, first retrace your steps and check all connections to try again. If problems persist, contact the service team for further assistance.