User manual 3M 900 PROJECTOR

[. . . ] When using your photographic equipment, basic safety precautions should always be followed, including the following: 1. Read and understand all instructions before using. [. . . ] To reduce the risk of electric shock, do not immerse this appliance in water or other liquids. To reduce the risk of electric shock, do not disassemble this appliance, but take it to a qualified technician when service or repair work is required. Incorrect reassembly can cause electric shock when the appliance is used subsequently. The use of an accessory attachment not recommended by the manufacturer may cause a risk of fire, electric shock, or injury to persons. Disconnect this unit from its source of supply before replacing the projection lamp. This unit is equipped with optical lenses and should not be exposed to direct sunlight. Keep ventilation openings free of any obstructions. This unit is assembled with a special power cable that, if damaged, must be replaced by the same type of cable. This power cable can be ordered from your local 3M Visual Systems Division Dealer and must be installed by a serviceman. The information contained in this manual will help you operate and maintain your overhead projector. [. . . ] Note Cleaning the underside of the stage glass or fresnel lens is not recommended. Problem Lamp does not come on - fan runs New lamp lasts for more than one minute but less than 2- hours -5 New lamp burns out immediately after turning on Fan doesn't run, but lamp is on Neither lamp nor fan comes on S S S S Probable Causes Lamp is burned out Lamp is not seated in the socket Lamp changer door is open Defective lamp Defective lamp Electrical problem Fan or motor is obstructed Not plugged into power source No power at the wall outlet Top cover not down all the way Screen is not perpendicular to the projected image Misaligned optical components Lamp not of the proper type S S S S Solution Replace or change lamp Seat lamp all the way in socket Close door Replace lamp S S S S S S Projected image is wider at the top S or on one side of the screen Corners of projected image appear S red or blue or the bottom or sides of projected image are not in focus S If 2nd lamp blows, have machine checked S Have machine serviced S Plug into power source S Check power supply S Close top cover all the way S Reposition the screen surface to be 90_ to the projected image S Have optical components adjusted by qualified technician S Replace with proper type lamp [. . . ]