No light extraction

The board card is problematic and needs replacement. Under normal circumstances, the optical density signal will be within the range of 0-5V when marking and 0V when not marking.

YMRF-50 machine can cause open circuit on signal wire or control switch,...

No light extraction

1.2M laser diode and usual laser power supply are used for this machine mode. A water protector is derailed on the signal wire between the board card and laser power supply to keep the laser diode working without water and to protect the laser diode.

The...

No laser extraction

Wrong choice of the three tap positions ON, OFF, RUN on old Q drivers: OFF is to stop the laser forcibly and ON is to start the laser forcibly; the right method is to choose RUN.

The board card is problematic and needs replacement. Under normal...