¶ Tools Required for Inspection:
● M2.5 Hex Wrench
● Multimeter
¶ 1.Poor Wiring or Cable Connection
Troubleshooting Steps:
¶ Step 1: Turn off the printer
Before troubleshooting, make sure to turn off the printer and disconnect the power for safety.
¶ Step 2: Disassemble the Hotend Housing
Use the M2.5 hex wrench to unscrew the two screws securing the hotend housing, and set them aside.
Push the latch in the direction indicated by the blue arrow using your hand.
Finally, remove the white connector of FAN0 by hand or with a suitable tool, and remove the hotend housing.
¶ Step 3: Disassemble the Printer Bottom Cover
① Place the printer flat with the bottom facing you. Use an M2.5 Allen wrench to loosen the four screws securing the base cover counterclockwise.
② Gently pry open the base cover at the cable outlet in the lower-left corner. Be careful to avoid damaging any components.
③ Disconnect the mainboard cooling fan (FAN2) cable fixed on the base cover. Handle it with care to prevent any damage.
¶ Step 4: Reconnect Cables
Reconnect the hotend heating rod cable and the hotend cable harness on both ends, one by one.
¶ 2.Hardware Inspection
Troubleshooting Steps:
¶ Step 1: Measure the Resistance of the Hotend Heating Rod
Before measuring, make sure to turn off the printer and disconnect the power for safety. Remove the hotend heating rod cable using your hand or a tool. Set the multimeter to the 200Ω range and measure if the resistance of the hotend heating rod is within the range of 9~12Ω. If it's not within the range, there may be an issue with the hotend. You can try replacing the hotend to troubleshoot.
¶ Step 2: Measure the Mainboard Voltage When Heating the Hotend
Tips：That this method requires working with electricity, so please ensure electrical safety and follow the measurement positions shown in the diagram.
Connect the printer to the power supply and turn it on. Manually adjust the hotend temperature to 200°C. Set the multimeter to the 200V DC range. Place the black probe (negative) on the second PIN from the left at the hotend heating port on the mainboard. Place the red probe (positive) on the first PIN from the left at the hotend heating port on the mainboard. Measure if there is a voltage of 24±2V at the mainboard hotend heating port when heating.
If the measured voltage is within the normal range (24±2V), it indicates that the mainboard is functioning correctly. Otherwise, if the measured voltage is not within the range, first measure if the power input voltage is 24±2V. If the power input voltage is within the range, it suggests a possible issue with the mainboard, and you can try replacing it. If the power input voltage is not within the range, and the measured value is the same as the hotend heating measurement, it indicates a possible issue with the power supply, and you can try replacing it.
The disassembly steps correspond to the assembly steps in reverse order. When assemble again, follow the reverse order of the disassembly steps.
If the previous troubleshooting methods were unsuccessful in resolving the issue. We recommend that you create an after-sales work order to provide the after-sales engineer with feedback on the previous inspection process and results. The after-sales engineers will assist you in finding a solution to the problem.(Reply time :1 working day)
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