Power switch assembly is a module mounted in the lower left corner of the back of the printer. It contains a socket for the power cord, a switch to control the power for the printer and cables used to connect it to printer's power supply, AC board and ground.
It's crucial to power off the printer before performing any maintenance work on the printer and its electronics, including tool head wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electronic damage and safety hazards.
When you perform maintenane or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electronic components while the printer is still on. This can damage the electronics of the printer and cause further damage.
Therefore, it's essential to switch off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer's electronics. By doing so, you can avoid potential damage to the printer's electronic components and ensure that the maintenance work is performed safely and effectively.
If you have any concerns or questions about following this guide, open a new ticket in our Support Page and we will do our best to respond promptly and provide you with the assistance you need.
Disconnect the power cord from the power socket.
Remove the 4 coarse tooth screws on the rear cover, P1P user needs to remove the 7 fine tooth screws, and P1S user needs to remove the 10 fine tooth screws. These two types of screws are not to be mixed, so keep them separate so you don't get them mixed up.
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.
Note: Newer versions of the machine have 1 additional screw on the left side of the slide that can be unscrewed with a H2.0 wrench.
Refer to this Wiki to remove the right side panel of the machine
Remove the cable railing by removing the 2 screws with an H2.0 allen key.
Remove 6 screws using H1.5 allen key, move the cable cover to the side.
Use a Phillips screwdriver to loosen the 6 cables as shown in the image below and pull out to the left to disconnect them.
From the inside of the vertical beam near the power switch block, use pliers to hold the nut, and from the outside of the vertical beam, use an H2.0 wrench to loosen the ground wire fixing screws and remove the ground wire.
Note: There are two ground wires fixed at the vertical beam, one for the whole machine ground (connected to the power switch block) and the other for the hot bed ground. Just loosen the whole machine grounding ground wire.
Note: There is a washer on the inside of the vertical beam in addition to the nut, so be careful not to lose it.
Use a flat tool to loosen the four tabs through the four openings in the frame on both sides of the power switch frame.
Remove the cable bundle tape and remove the cable that was disconnected in step 7 by threading it through the wire clips from right to left. The power switch assembly can then be removed along with the cable to complete disassembly.
Feed all the cables of the new power switch assembly through the frame. Push the power switch assembly inward until all the tabs are in place and the assembly is firmly secured to its frame.
Secure the ground wire by holding the nut with pliers from the inside of the vertical beam, and tighten the ground wire set screw from the outside of the vertical beam using an H2.0 wrench.
Note: Grounding is an important measure to ensure electrical safety, so be sure to securely fix the ground wire.
Thread the cables through the wire clips from left to right and apply the bundling tape. Use a Phillips screwdriver to secure the cable connector to the power supply module and AC board with Phillips screws.
NOTE: When connecting the top AC board, the wire sequence from top to bottom should be Neutral-Live-Ground, i.e., the colors are Blue-Brown-Yellow/Green. There are devices shipped with reversed neutral-live connection before August 2023 (as shown in the picture). Due to circuit protection this phenomenon has no effect on the function of the printer, but a trip will occur when connecting the printer to a polarity socket.
Lock in 6 screws using H1.5 allen key to secure cable cover.
Install the cable railing by lock in 2 screws with an H2.0 allen key.
Refer to this Wiki to install the right side panel.
Install the excess chute, lock it in with 2 screws.
If the additional screw is removed from the side of the chute, remember to put it back.
Pass through the tube bracket and the right side belt tension port first to install the rear cover.
Screw the back panel back on. Note the different types of screws used.
Connect the power cord and turn power ON. Start a self-test. If no errors occur, the replacement is completed successfully.
We hope that the detailed guide we shared with you was helpful and informative.
We want to ensure that you can perform it safely and effectively. If you have any concerns or questions regarding the process described in this article, we encourage you to reach out to our friendly customer service team before starting the operation. Our team is always ready to help you and answer any questions you may have.
We will do our best to respond promptly and provide you with the assistance you need.