3M 9550 Operating Guide - Page 6

Cleaning Color Tuning 1. The mirror in the open projection head is a front-surface mirror and must not be wiped clean. 2. Remove any surface dirt with a soft brush to avoid scratching the mirror. 1. To eliminate red or blue corners on the screen, rotate the Color Tuning Dial. a. Blue corners -- Rotate the dial to the left. b. Red corners -- Rotate the dial to the right. 3. Clean the outside surfaces of the projection lenses and the stage with 3MtOverhead Cleaner 676 (70-0705-6877-2). Note Cleaning the underside of the stage glass or fresnel lens is not recommended. Improper cleaning or disassembly may damage the fresnel lens. If cleaning is required, contact your local 3M Visual Systems dealer for assistance. Troubleshooting Problem Probable Causes Solution Lamp does not come on -- fan runs S Lamp is burned out S Replace or change lamp S Lamp is not seated in the socket S Seat lamp all the way in socket S Lamp changer door is open S Close door New lamp lasts for more than one S Defective lamp minute but less than 2--5 hours S Replace lamp New lamp burns out immediately S Defective lamp after turning on S Electrical problem S Try one more lamp. If 2nd lamp blows, have machine checked Fan doesn't run, but lamp is on S Fan or motor is obstructed S Have machine serviced Neither lamp nor fan comes on S Not plugged into power source S Plug into power source S No power at the wall outlet S Check power supply S Top cover not down all the way S Close top cover all the way Projected image is wider at the top S Screen is not perpendicular to S Reposition the screen surface to or on one side of the screen the projected image be 90_ to the projected image Corners of projected image appear S Misaligned optical components S Have optical components red or blue or the bottom or sides of adjusted by qualified technician projected image are not in focus S Lamp not of the proper type S Replace with proper type lamp Page 4 3M 9000 Series Operator's Guide