Mainboard Precautions

Power Indicator

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• When powered only via TYPE-C without connecting other mainboard power sources, at least two lights, 3.3V and 5V, should be on.
• After connecting the mainboard power supply, the mainboard power indicator lights should show 3.3V, 5V, and 12V.
• The power indicator lights at the bottom left of the mainboard will only light up normally after connecting the driver power supplies 0-2, driver power supplies 3-7, and the heated bed power supply.

Troubleshooting

Important Notes

• With no external devices connected (drivers, limit switches, 12864 display, etc.)
• When powered only via TYPE-C, at least the 3.3V and 5V LEDs should be constantly lit.

• If 3.3V and 5V are not lit, please check the mainboard's 5V jumper.
• If the issue persists after replacing the jumper and confirming the Type-C power supply is normal, contact customer service for after-sales support.
• If any of the 3.3V, 5V, or 12V lights are blinking, it indicates a chip short circuit. Contact customer service for after-sales support.
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Drivers

• Please note the driver power supply. The driver power is divided into two circuits: the first supplies power to drivers 3-7, and the second supplies power to drivers 0-2.
• The mainboard supports external drivers. Wiring and Configuration Tutorial

Limit Switch Ports

• Except for the last driver port (Drive7), which has a no-limit jumper, the no-limit function for other driver ports is directly connected to the limit switch ports.
• If a limit switch port is found to be unusable, you can replace the limit switch port or cut the no-limit pin on the driver.
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Firmware Flashing

• The mainboard uses a TF card for firmware flashing.
• Previously, due to tutorial issues, DFU was used for flashing. If you need to update the firmware, you need to reflash the BL.

Thermistors

• The mainboard thermistor ports support:
  • NTC thermistor
  • PT1000 thermistor