ViewSonic PJ750-2 Service Manual - Page 21

• Before Replacing the LCD / Lens Prism You should not replace separately the parts of the liquid crystal LCD / Lens Prism because it works properly only when used together. Therefore, regarding these parts, you can either replace part, LCD / Lens Prism assembly, or send the whole unit LCD / Lens Prism assembly back to SUPPLIER, where we will replace the malfunctioning part, recondition the device and send it back to you. In that case please contact our distributor. DISTRIBUTOR • Do not disassemble the unit because replacement of separate parts is not possible. SUPPLIER I I G Panel Return ( Replacement of G Panel -> Reconditioning • Air Filter Cleaning the Air filter The air filter should be cleaned as described below at intervals of approximately 300 hours. 1. Switch the projector power supply OFF, and remove the power cord from the power outlet. 2. Clean the air filter with a vacuum cleaner. Replacing the Air filter Replace the air filter if contamination cannot be removed, or if it is damaged. 1. Remove the filter cover. 2. Remove the old filter. 3. Set the new filter and filter cover. CAUTION • Switch power OFF and remove the power cord from the power outlet before beginning mainte- nance work. Please read the separate "SAFETY INSTRUCTIONS" thoroughly to ensure that maintenance is performed correctly. • Replace the air filter if contamination cannot be removed, or if it is damaged. Contact your dealer in such case.(Option Air filter assembly : MU01421) • Do not use the equipment with the air filter removed. • When the air filter is clogged with dust etc. the power supply is switched OFF automatically to prevent the temperature rising inside the projector. ViewSonic Corporation CONFIDENTIAL -- DO NOT COPY PJ750-2 18