120065-002 | LEE LASER Q-SWITCH

The front panel of Lee Laser Q-switch drivers lists four (4)FAULT INDICATORS that, whenilluminated, indicate a status problem with the laser ‘s Q-switch system.This technical bulletinwill help you to determine the cause of the FAULT INDICATOR, and what action to take tocorrect the problem.An “OVER TEMP” interlock on the front panel of the Q-switch driver is caused by the Q-switchnot being sufficiently cooled. When the Q-switch overheats, the RF power output from the Q-switch driver automatically will switch OFF.Sometimes the water hose connections at the Q-switch will become too tight. When thishappens, the hose will become compressed inside the fitting,and water flow through the Q-switch will be reduced or stopped altogether. This causes the Q-switch to overheat and anOVER TEMP interlock will occur.