-8-Circuit ProtectionsThis projector provides 2 mechanical sensor switches, the one is for air filter unit switch (SW1891) and the other oneis for lamp cover switch(SW901).The projector is shut down and the < ON(G)/STANDBY(R)> indicator lights in red and otherindicators are blinking.The air filter unit switch (SW1891) detects whether the air filter unit is installed correctly. If the air filter unit switch isnot installed correctly, the projector cannot turn on. In this case, the indicator lights in red andother indicators are blinking.- Check that the lamp cover is installed securely.The projector is shut down and the < ON(G)/STANDBY(R)> and indicators areblinking.The lamp cover switch (SW901) detects whether the lamp cover is closed securely. If lamp cover is opened or notclosed completely, the drive signal to the lamp circuit is cut off. After opening the lamp cover for replacing the newlamp assy, place the lamp cover correctly otherwise the projector cannot turn on.- Check that the air filter unit is installed securely.Air filter unit switch(SW1891)Lamp cover switch(SW901)Air filter unitMechanical sensor switchesON(G)/STANDBY(R)indicatorLED indicatorsLAMP indicator
