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?

Choose your way:

Please do as follow:

  1. Do not connect the laser module, only connect the 12V power supply to the adapter board
  2. Now connect the 4P wire to the laser module
  3. 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:

Please do as follow:

  1. Do not connect the laser module, connect the 12V power supply to the laser test board
  2. Access laser module
  3. Press the ℃ button
  4. Press the switch key to switch to test mode, and 001 should be displayed at this time
  5. 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:

Please do as follow:

  1. Only connect 12V and GND for your laser, others are empty
  2. 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:

If the laser module does not work properly, please contact us and take a video about the above test steps. In addition, disassemble your module and take a photo of your module as shown below(if you are free, please take more photos, which is helpful to us. Thank you.)

24 thoughts on “Troubleshooting of NEJE laser module”

  1. Lee Hawthorne

    I received my laser in march 2021 and the second time I applied power it came on at full power. I contacted Bangood and had made a video. I was moving. and before i could comply with there additional request on April 2nd my house had a fire. Bangood closed the ticket.
    the new laser was at the new place the engraver was not and I am finally replacing the engraver machine. Today I took the Laser out and videoed the unit and took some pictures. I plan on ordering the NEJE PWM/Temperature laser switch board for this unit, if i can get it working right. I hopefully can use this laser as it seams to have enough power. Thank You for your time Lee Hawthorne

    video https://youtu.be/jO4TbCKiAwI

      1. John McGovern

        Did you get any pictures I sent are the questions ive been asking? Ive been trying to get this thing sent out today but I dont even know to send it.

  2. Hello,
    On October 16th 2021 I bought
    “NEJE A40630 laser engraver / cutter module kits
    – FAC – 7.5w output – China / all of above + 12V power adapter + goggles”
    with the order 5109, but after less than a month it stopped working.
    The Driver card turns on regularly, but the laser shows no sign of life.
    What should I do???
    Thank you

  3. Hello,
    On October 16th 2021 I bought
    “NEJE A40630 laser engraver / cutter module kits
    – FAC – 7.5w output – China / all of above + 12V power adapter + goggles”
    with the order 5109, but after less than a month it stopped working.
    The Driver card turns on regularly, but the laser shows no sign of life.
    What should I do???
    Thank you

  4. Nicole Hellstern

    Hi,
    I’m using the NEJE Master 2S.
    Current problem: Laser does not start. Green light for a second.
    Well, it starts for a second, than it shuts down and all light flip for a
    second.
    Communication error, we need reconnect to device…
    We already updated the firmware and think everthing is fine
    except starting the laser.

    Thanx for your help.
    br Nicole

  5. Jairo Elias

    Dear friends

    Unfortunately I connected the module to 24v, burning a component on the laser driver board, probably a capacitor.
    I need to know the capacitor is, as well as the polarity so I can replace it.
    It’s burned is impossible read the identification.
    The photo shows the component that was damaged. If you guys can help me I would be grateful. It’s the fifth module I buy, but this one, unfortunately, I made this mistake.

    Thank you so much

  6. I tried all what you had in the test. I found a loose connection at the module. On full power if I would touch the connection on the module the laser light would get brighter. Could there be a bad connection on the module?

Leave a Comment

Your email address will not be published.

The maximum upload file size: 50 MB. You can upload: image, audio, video, document, spreadsheet, interactive, text, archive, code, other. Links to YouTube, Facebook, Twitter and other services inserted in the comment text will be automatically embedded. Drop files here