[Sonic Mini 8K S] Checking the LED

If you notice that your printer’s LCD is dimming or not illuminating, it may be due to issues with the LEDs. This article will guide you through the process of checking your device's LED to check whether the LEDs are properly connected or have burned out

DO NOT look directly at the UV light to prevent eye discomfort.

Visual check the LED chip (COB)

1. Turn off the printer
2. Remove the UV cover, resin vat, and building plate
3. Carefully lay down your printer
4. Loosen the 4 screws on the bottom case, and then open the case

5. Unplug the LED connector and Fan connector and remove the bottom case

6. Inside the hood, you will find the LED. Take a picture and check if there are any burnt LEDs

The picture below shows the burnt LEDs as an example.

7. If it is difficult to identify whether the LED is burnt out or not, turn on the printer, then tap TOOLS > LCD TEST to turn on the LED
8. Take a photo of the LED chip (COB) to confirm whether it is lit up. The picture below shows the burnt LEDs as an example when it is lit up

Check the red & black wires for the 3 LED terminal blocks

If the LED on the Sonic Mini 8K S is not lighting up, check the connection of the LED terminals as they may be the cause of the issue.

The LED connections consist of three pairs of wires. One pair is connected to the mainboard, and the other two pairs are connected to the LED driver board. That is, Terminal 1 is situated on the mainboard, while Terminal 2 and Terminal 3 are situated on the LED driver board, which is located at bottom case.

Here are the steps:

1. Turn off the printer
2. Remove the UV cover, building plate, and resin vat
3. Carefully lay down your printer
4. Loosen the 4 screws on the bottom case, and then open the case

5. Unplug and then replug the white LED connector to the mainboard
6. Use a slotted screwdriver, and reattach the red & black wires if the wires have become disconnected from the terminal block

7. Reinstall the bottom case
8. Plug in the power cable and turn on the printer 
9. On the touch panel, tap TOOLS > VAT CLEANING to activate the LED
10. Check if the LCD has returned to normal brightness

Check the Power Adapter

The purpose is to check whether the power adapter being used is the original one provided by Phrozen and matches the correct specification. Using a different power adapter can cause the LED to not light up properly.

1. Check the label on the power adapter to verify its specification
2. Make sure that you are using the power adapter that came with the printer, and that its output is rated at 24V / 2.0A

Contact Support

By following these steps, you can easily check the LEDs on your device and determine whether they need to be repaired or replaced. If the issue persists after attempting the above steps, please contact Phrozen support or your authorized reseller for assistance.