Sanyo PLC-SU70 Service Manual
Also see for PLC-SU70: Owner's manual
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Contents
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-6-Circuit ProtectionsWarning temperature and power failure protectionThe projector will be automatically turned off when the internal temperature of the projector is abnormally high, or thecooling fans stop spinning, or the power supplies in the projector are failed.- If the WARNING indicator is flashing, it may detect the abnormal temperature inside the projector. Check the follow-ing possible causes and wait until the WARNING indicator stops flashing, and then try to turn on the projector.- If the WARNING indicator lights red, it may defect the cooling fans or power supply circuits. Check fans operationand power supply lines referring to the chapter “Power supply & protection circuit” in the Chassis Block Diagramsection.Possible causes- Air filters are clogged with dust particles. Remove dust from the air filters by following instructions in the “Air filtercare and cleaning” below.- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots arenot obstructed.- Check if projector is used at higher temperature place (Normal operating temperature is 5 to 35 ˚C or 41 to 95˚F)Air filter care and cleaningAir filters prevent dust from accumulating on the optical elements inside the projector. Should the air filters becomeclogged with dust particles, it will reduce cooling fans’ effectiveness and may result in internal heat build up and ad-versely affect the life of the projector. Clean the air filters following the steps below.1. Turn off the projector, and disconnect the AC power cordfrom the AC outlet.2. Turn over the projector and remove the air filters by pullingthe latches upward.3. Clean the air filters with a brush or rinse them softly.4. When cleaning the air filters by rinsing, dry them well. Re-place the air filters properly. Make sure that the air filtersare fully inserted.CAUTION:Do not operate the projector with the air filters removed.Dust may accumulate on the LCD panel and the projectionmirror degrading picture quality.Do not put small parts into the air intake vents. It may resultin malfunction of the projector.RECOMMENDATION:We recommend avoiding dusty/smoky environmentswhen operating the projector. Usage in theseenvironments may cause poor image quality.When using the projector under dusty or smoky conditions, dust may accumulate on a lens, LCD panels, or opticalelements inside the projector. This condition may degrade the quality of a projected image.When the symptoms above are noticed, contact your authorized dealer or service station for proper cleaning.Air filters |
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