[Sonic Mighty 8K] Checking the LED

If you notice that your printer’s LCD is dimming or not illuminating, there might be something wrong with your LEDs. This article will guide you through a complete process in which you can easily verify whether the LEDs can still function properly or have become faulty.

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

1. Visual check the LED chip (COB)

Power down and prepare

• Turn off the printer and unplug it
• Loosen the 4 screws on the front case and the 8 screws on the rear case
• Remove the front case and the rear case

Be cautious when sliding off the 2 cases to avoid damaging any cables.

Identify burnt LEDs

• Locate the LED chip (COB) located behind the lens

• Take a picture of the LED to see if there is any burnt LED 

Another method to identify burnt LEDs

• Turn on the printer, then tap TOOLS ➝ LCD TEST to activate the LED
• Take a photo of the LED chip (COB) to confirm if there is any burnt LED

2. Check the red & black wires of the 3 LED terminal blocks

If the LED on the Sonic Mighty 8K is not lighting up, check the connections 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 the second block from the left on the mainboard, while Terminal 2 and Terminal 3 are situated on the LED driver board, which is located at the back of the printer.

Power down and prepare

• Turn off the printer
• Loosen the 4 screws on the front case and the 8 screws on the rear case
• Remove the front case and the rear case

Be cautious when sliding off the 2 cases to avoid damaging any cables.

Reconnecting the black and white cables

• Prepare a slotted screwdriver
• Gently tug on the red and black wires connected to Terminal 1, Terminal 2, and Terminal 3 to check for any looseness
• If the wires have become disconnected from the terminal block, use a screwdriver to reattach them (see below)

Reinstall the cases securely

• Tighten the 4 screws on the front case and the 8 screws on the rear case

Turn on the printer and run a test

• Plug in the power cable and turn on the printer
• Perform LCD test or VAT cleaning to activate the LED
• Check if the LCD has returned to normal brightness

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 you find any issues, feel free to reach out to Phrozen Support or your Authorized Reseller for further assistance. When contacting Phrozen Support, kindly share a few photos and videos illustrating the issues with the LED. This will greatly facilitate the troubleshooting process.