Sanyo PLC-WM4500L Service Manual

Also see for PLC-WM4500: Owner's manual User manual Owner's manual Owner's manual Manual

Contents

-16-CleaningAfter long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarizedglass, lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit.Remove dust and other particles using air spray. If dirt cannot be removed by air spray, disassemble and cleanthe optical unit.MaintenanceUnplug the AC power cord before cleaning.Gently wipe the projection lens with a cleaning cloth that contains a smallamount of non-abrasive camera lens cleaner, or use a lens cleaning paperor commercially available air blower to clean the lens.Avoid using an excessive amount of cleaner. Abrasive cleaners, solvents,or other harsh chemicals might scratch the surface of the lens.Unplug the AC power cord before cleaning.Gently wipe the projector body with a soft dry cleaning cloth. When thecabinet is heavily soiled, use a small amount of mild detergent and finishwith a soft dry cleaning cloth. Avoid using an excessive amount of cleaner.Abrasive cleaners, solvents, or other harsh chemicals might scratch thesurface of the cabinet.When the projector is not in use, put the projector in an appropriate carry-ing case to protect from dust and scratches.cleaning with air sprayRemove the cabinet top following to “Mechanical Disassembly”. Clean up the LCD panel and polarizing plate byusing the air spray from the cabinet top opening.caution:Use a commercial (inert gas) air spray designed for cleaning camera and computer equipment. Use a resin-basednozzle only. Be very careful not to damage optical parts with the nozzle tip. Never use any kind of cleanser on theunit. Also, never use abrasive materials on the unit as this may cause irreparable damage.disassembly cleaningDisassembly cleaning method should only be performed when the unit is considerable dirty and cannot be suffi-ciently cleaned by air spraying alone.Be sure to readjust the optical system after performing disassembly cleaning.1. Remove the cabinet top and main units following to “Mechanical Disassembly”.2. Remove the optical base top following to “Optical Unit Disassembly”. If the LCD panel needs cleaning, removethe LCD panel unit following to “LCD panel replacement”.3. Clean the optical parts with a soft cloth. Clean extremely dirty areas using a cloth moistened with alcohol.caution:The surface of the optical components consists of multiple dielectric layers with varying degrees of refraction.Never use organic solvents (thinner, etc.) or any kind of cleanser on these components.Since the LCD panel is equipped with an electronic circuit, never use any liquids (water, etc.) to clean the unit. Useof liquid may cause the unit to malfunction.Cleaning the Projector CabinetCleaning the Projection Lens