How to know my control board version

Disassemble your control board from your device. The version mark usually marked on the front of the board. The following are examples of neje 2S and neje 2S max. the version of neje 2S control board in the figure is v1.1, The version of neje 2S Max control board is v2.0

How to fix my A40640?

If your A40640 is damaged and similar to the figure below, we provide a repair method: Note: This fix applies only to N40640 v1.2 and v1.3 laser drives, You can find the driver version number on the other side of the driver board. Please note that when disassembling your laser, please remove the four screws …

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