Troubleshooting of NEJE Laser Module

This article will help you determine whether your laser has failed and where it has failed.

This page is only applicable to the digital version laser module. How to distinguish?

For Laser Module with Adapter

Please do as follow:

Do not connect the laser module, only connect the 12V power supply to the adapter board
Now connect the 4P wire to the laser module
Press the test button on the laser adapter board

Normally:

In step 1, the red LED on the adapter board will light up. After connecting the laser module in step 2, the blue LED will flash, the fan of the laser will rotate, and the LED on the laser will flash. Fan may off after 1 second. In step 3, when you press the test button, the laser will work at full power.

Abnormal conditions:

In Step 1: The red LED is not on(Error Code: L1)

Check your power supply

In step 2, when I connect 4P, the red LED goes out or flashes instead of always on (Error Code: L2)

In step 2, when I connect 4P, the laser has been turned on at full power (Error Code: L3)

In step 2, the blue LED does not flash (Error Code: L4)

In step 3, when I pressed the test button, the laser is not no (Error Code: L5)

In step 3, when I press the test button, the laser flashes, then turns off, and the red LED on the adapter board will also flash (Error Code: L6)

The current of your power adapter is too low. Please replace the power adapter with a higher power. 12V 5A adapter is recommended

In step 3, when I press the test button, the laser power is very weak (Error Code: L7)

For Laser Module With PWM Tester

Please do as follow:

Do not connect the laser module, connect the 12V power supply to the laser test board
Access laser module
Press the ℃ button
Press the switch key to switch to test mode, and 001 should be displayed at this time
Press the PWM + key continuously until 100%

Normally:

In step 1, connect the power supply to the laser test board, and the test board should display the “off” sign. In step 2, after connecting the laser module, the last point of the digital display should flash. In step 3, press the ℃ button to display the module temperature. In step 4, the nixie tube should display 001. At this time, “test mode” should be on instead of “TTL in” led. At this time, The laser should be a very low power output. In step 5, the laser intensity will gradually increase until 100%

Abnormal conditions:

Laser tester is not displayed in step 1(Error Code: L1)

Check your power supply

In step 2, when I connect the laser module, the laser test board starts flashing or goes out (Error Code: L2)

In step 2, when I connect the laser module, the laser has been output at full power (Error Code: L3)

Pressing the ℃ button in step 3 does not display the temperature correctly (Error Code: L4)

In step 4, the laser does not light up (Error Code: L5)

In step 5, when I gradually increase the output, the laser suddenly turns off, and then the test board displays off (Error Code: L6)

The current of your power adapter is too low. Please replace the power adapter with a higher power. 12V 5A adapter is recommended

In step 5, when 100% is reached, the laser output power is very weak (Error Code: L7)

For Single Laser Module

Please do as follow:

Only connect 12V and GND for your laser, others are empty
Connect TTL line to 12V

Normally:

In step 1, the fan should on for 1 second, the red led should blink about 7 times. In step 2, your laser should be at full power output.

Abnormal conditions:

In step 1, your laser fan did not start (Error Code: L1)

Check your power supply

In step 1, your laser is at full power output (Error Code: L3)

In step 1, your laser starts flashing (Error Code: L2)

In step 2, your laser has no output (Error Code: L5)

In step 2, your laser starts flashing (Error Code: L6)

The current of your power adapter is too low. Please replace the power adapter with a higher power. 12V 5A adapter is recommended

In step 2, your laser output power is very low (Error Code: L7)

How to contact us ?

If the laser module does not work properly, please contact us and take a video and a image, the image content is the driver board of your laser module like below

The video content should contain :

The steps you do(above)
Allways record the status of the module fan in the video