¶ What are the tool head boards（New version）
The new version tool head boards of the X1 series include the extruder board, the interface board, and the connecting FPC. They can be replaced according to the actually damaged parts.
¶ When to use
- Connectors and components got damaged
- Issues were found through a printer LOG analysis
¶ Tools and materials needed
- H1.5 hex key
- Bambu Lab tool head board(s)
- Silicon glue
¶ Safety warning and Machine state before starting operation
Power OFF the printer before doing any maintenance work in case caused any damage to your printer.
¶ Operation Guide
Note: Use a hair dryer to heat the silicone glue that applies to the connectors before disconnecting it to prevent damage to the connectors, or use tweezers to remove some glue first. It is also recommended to apply silicone glue for reinforcement after reconnection.
¶ Step 1 - Remove the front housing assembly
Open the front housing assembly, disconnect the connecting cable, and then take off the front housing.
¶ Step 2 - Loosen the cutter lever
Use the H1.5 Allen wrench to Loosen the screw of the cutter lever with the H1.5 hex key to make it sag naturally, and press to disconnect the PTFE tube from the extruder.
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¶ Step 3 - Remove the tool head housing
Remove the 8 screws fixing the tool head housing with the H1.5 hex key on both sides, and remove the tool head rear cover and middle frame.
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¶ Step 4 - Disconnect the USB cable
Disconnect the USB cable from the extruder main board, and then remove it together with the bracket from the tool head.
¶ Step 5 - Remove the connecting FPC
Unscrew the screws at both ends of the connecting FPC with the H1.5 hex key and remove the brackets, disconnect the cable, and remove it from the tool head.
Note: The 4 screws used here are smaller in size. Avoid tightening the screws vigorously to prevent the screws from breaking and cannot be mixed with other screws.
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¶ Step 6 - Remove the interface board
Disconnect 4 cables connecting to the interface board, remove 2 screws with an H1.5 hex key, and remove the interface board.
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Warnings: The thermistor plug has a buckle/latch (different than the fan and heater) that they need to push to unlatch rather than pull on the wires/plug till the whole PCB connector comes off.
¶ Step 7 - Remove the extruder main board
Disconnect 3 cables connecting to the extruder main board, remove the 3 screws with an H1.5 hex key, turn the extruder main board to the left, disconnect the 2 laser cables, and then remove the extruder main board.
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¶ Step 8 - Install the extruder main board
Install the extruder main board onto the tool head and lock in 3 screws. Then connect the camera flexible cable, install the bracket, and lock in two screws.
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¶ Step 9 - Connect the cable (extruder main board)
Connect the 5 cables to the extruder main board respectively, pay attention to the direction of the connectors, and it is recommended to reinforce the connections with silicone as they did before disconnected. Arrange the 3 cables of the lidar as shown in the figure to avoid damaging and affecting the installation of the enclosure.
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¶ Step 10 - Install the interface board
Install the interface board onto the tool head and screw in 2 screws. Then connect the cable of the Hall board (extruder). It is recommended to apply the silicone glue for reinforcement, and then connect the 3 hotend cables.
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¶ Step 11 - Install the connecting FPC
After confirming the direction of connecting the flat cable, install it into the slot above the tool head. Then connect them to the connectors of the interface board and the extruder main board, and reinforce them with crimping brackets and screws.
Note: The 4 screws used here are smaller in size. Avoid tightening the screws vigorously to prevent the screws from breaking and cannot be mixed with other screws.
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¶ Step 12 - Connect the USB cable
Connect the USB cable to the extruder main board, press the USB cable into the cable base, and then mount the cable bracket in place.
¶ Step 13 - Install the tool head housing
Install the middle frame and rear cover of the tool head, and lock 4 screws on both sides respectively.
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¶ Step 14 - Install the cutter lever
Lift the cutter lever by hand, slide the cutter into the extruder along the cutter slot, lock the fixing screw, and then connect the PTFE tube.
¶ Step 15 - Install the front housing
Connect the front cable as shown in the figure below and then close the front housing.
¶ Operation video（Pending）
Note: Use a hair dryer to heat the silicone glue that applies to the connectors before disconnecting it to prevent damage to the connectors, or use tweezers to remove some glue first.
¶ How to verify completion/success
- Power ON the printer
- 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.
¶ Differences between the versions
The main differences between the new and old versions of the tool head boards.As shown in the pictures below, V8 is the old version, and V9 is the new one.
1. Combine the cable and ground wire into one FPC;
2. The reinforcement method at both ends of the connecting cable is changed from silicone fixation to bracket reinforcement;
3. The direction of the NTC connector on the interface board is changed;
4: The direction of the connector used to connect the extruder main board and the front housing is changed.