Canon LV-7105 Service Manual - Page 37
Warning Temperature and Power Failure Protection, 4 Air Filter Care and Cleaning
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Part 2: Repair Information 2.3 Warning Temperature and Power Failure Protection The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal temperature of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power supply lines are failed. Check the following possible causes and wait until stopping the TEMP WARNING indicator flashing. Possible causes • Air filter is clogged with dust particles. Remove dust from the air filter by following instructions in the "Air filter care and cleaning" below. • Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots are not obstructed. • Check if projector is used at higher temperature place (Normal operating temperature is 5 to 35 ˚C or 41 to 95 ˚F) If the TEMP WARNING indicator still continues to flash, there may be defects on cooling fans or power supply circuits. Please check fan operation and power supply lines referring to the "Power Supply Lines Chart". 2.4 Air Filter Care and Cleaning The removable air filters prevents dust from accumulation on the surface of the projection lens and projection mirror. Should the air filter become clogged with dust particles, it will reduce the cooling fan's effectiveness and may result in internal heat build up and reduce the life of the projector. Air filters (Small) Air filters (Large) To clean up the air filters, follow the cleaning procedure below: 1. Turn the power off, and disconnect the AC power cord from the AC outlet. 2. Turn the projector up side down and remove 2 air filters (Large and Small) by pulling the latches of them upward. 3. Clean the air filters with brush or wash out the dust and particles. 4. Replace each air filter properly. Make sure that the air filters are fully inserted. Fig. 2-3 2-3
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