¶ Overview
¶ Location
The PCB is located inside the toolhead and can only be replaced after removing the housing.
¶ Terminology
Different from our official term, some people may use the following terms to describe this component:
- Tool head PCB
- Toolhead board
- Print head PCB
¶ Difficulty and Time Estimate
- Difficulty：★☆☆☆☆ (Easy)
- Estimated Time：15 minutes
¶ When to Replace
When the toolhead PCB is damaged or malfunctioning.
¶ Where to Buy
Available at the Snapmaker Official Store
¶ Tools and Parts Required
- H1.5 hex key
- H2.0 hex key
- New U1 toolhead PCB
¶ Part 1. Remove the Toolhead
¶ Step 1. Unload filament
- Tap the specified area on the touchscreen (Highlighted in red in the image below).
- Tap "Unload Mode".
- Select the target toolhead (e.g., No.2) and tap "Unload".
- Wait for the system to automatically complete the filament unloading.
¶ Step 2. Detach the toolhead from the docking bracket
Before proceeding, please turn off the machine and unplug the power cable!
-
For head No.1: Slide to the right until the locating pin is fully visible.
-
For heads No.2/3/4: Slide the toolhead to the left until the locating pin is fully visible.
¶ Step 3. Remove filament and guide tube
- Press the quick-release fitting and remove the filament and guide tube.
¶ Step 4. Disconnect USB and remove the toolhead
- Use the H2.0 hex key to remove the two mounting screws.
- Unplug the USB cable and then carefully remove the toolhead.
¶ Part 2. Remove the Old PCB
¶ Step 5. Remove top cover and back cover
- Use the H2.0 hex key to remove the three screws securing the top cover of the toolhead.
- Remove the back cover of the toolhead.
¶ Step 6. Disconnect the cables and remove the PCB
- Disconnect the cables from the PCB.
When installing the new toolhead PCB, please refer to the wiring diagram below.
| No. | Cable | Detail |
|---|---|---|
| 1 | Motor cable | 4 wires: green, black, blue, red |
| 2 | Filament detection cable | 3 wires: red, yellow, black |
| 3 | Calibration sensor cable | 2 wires: black |
| 4 | Fan cable | 4 wires: red, black, blue, yellow |
| 5 | Ceramic heater cable | 2 wires: white |
| 6 | Thermistor cable | 2 wires: white |
- Use the H1.5 hex key to remove the M2×6 screw, and the H2.0 hex key to remove the ST2.6×6 screw, then take out the old PCB.
¶ Part 3. Replace the PCB
¶ Step 7. Install the new PCB
- Place the new PCB in the position shown in the image. Use the H1.5 hex key to tighten the M2×6 screw, and the H2.0 hex key to tighten the ST2.6×6 screws.
- Reconnect all PCB cables as labeled in the image.
| No. | Cable | Detail |
|---|---|---|
| 1 | Motor cable | 4 wires: green, black, blue, red |
| 2 | Filament detection cable | 3 wires: red, yellow, black |
| 3 | Calibration sensor cable | 2 wires: black |
| 4 | Fan cable | 4 wires: red, black, blue, yellow |
| 5 | Ceramic heater cable | 2 wires: white |
| 6 | Thermistor cable | 2 wires: white |
- Organize cables.
¶ Step 8. Install the toolhead housing
- Install the top cover of the toolhead.
- Install the back cover of the toolhead.
¶ Part 4. Install the toolhead
¶ Step 9. Place the toolhead onto the docking bracket
Before installing the toolhead, please make sure the sliders are in the correct positions. The slider for Toolhead No. 1 should be set to the far left, while the sliders for Toolheads No. 2, 3, and 4 should all be set to the far right.
You can use a hex key to adjust the slider and make sure the red mark on the slider is visible.
- Align the hole on the toolhead with the long locating pin on the docking bracket, and push inward until it stops.
The illustrated side of the toolhead should face inward.
- Align the two locating pins on the toolhead with the holes shown on the mount.
For No.1 head: hole is to the left of the pins
For No.2/3/4 heads: hole is to the right of the pins
¶ Step 10. Connect and secure the USB cable
- Plug in the USB cable and fasten the two screws with the H2.0 hex key.
¶ Step 11. Load filament
- While pressing part 1, as highlighted in the image below, insert the filament into part 2 until it reaches the end.
- Finally, connect the guide tube. The toolhead installation is now complete.
¶ Verification
- Check whether the indicator light on the toolhead PCB turns on after powering on
- Check whether the toolhead is recognized properly
- Check whether the toolhead's heating and printing functions are working correctly
¶ Reach out to Snapmaker Support
After following the troubleshooting steps, if you find it difficult to resolve your issue, kindly submit a support ticket through https://snapmaker.formcrafts.com/support-ticket and share your troubleshooting results with some pictures/videos.
Our dedicated support team will be more than willing to assist you in resolving the issue.