a) This failure means “current testing – laser emission current is tested too large/small”. Use it again after restarting the instrument. If this failure still occurs, find out the problem. At this time, continue the use by ignoring this problem.
b) First, watch handle treatment window visually after power-off. Observe whether there is the burning damage trace on the semiconductor laser (check whether there is the obvious black point or strip). If any, it should be the damage of semiconductor laser unit. Replace the semiconductor laser unit.
c) Test with photographic paper. Regulate the energy density to 5-10 J/cm², to check whether there is laser emission.
d) Where there is the laser emission, test the 200 ms pulse width (1 Hz; laser emission for one time; 10 J/cm² and 30 J/cm²) and confirm whether the laser emission strength changes obviously. If any, try replacing current Hall sensor and relevant wiring harness; if not, try replacing the main control board of main console. Should the laser emission do not change obviously, try to replace the laser power supply and main control board of main console. (Do not look directly at the output laser.)
e) Where no laser is emitted, observe whether the laser power working indicator lamp flickers during the theoretical laser emission. If the lamp does not flicker, try to replace the DB9 wiring harness, laser power supply and main control board of main console.