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My Sanyo PLC-XP56 worked just fine for a show last week. This week when I tried to use it for a different event, it turned itself off, and flashed two LEDs on the top, and would not turn on again until it was disconnected from the power supply and re-connected. Later it did this twice during the event. The user manual has this to say about the flashing LEDs “The projector detects an abnormal condition and cannot be turned on. Unplug the AC Power Cord and plug it again to turn on the projector. If the projector is turned off again, disconnect the AC power cord and contact the dealer or the service center for service and checkup. Do not leave the projector on. It may cause electric shock or a fire hazard.” The LEDs that light up are as follows: Red Warning temp- flashing. Green Ready- flashing. Red Lamp- Steady bright. So I read the manual and warnings, but I wonder if anyone has run into this before. It seems strange to me that it just started. This projector was in to Sanyo last year for maintenance, and worked just fine on two events last week. Any ideas you have can help. Thanks very much.
Inside your projector are several temp sensors (thermistors). They are actually NTC thermistors (NTC= negative temperature coefficient, meaning as temp goes up resistance goes down). Once a thermistor has activated to save your machine form heat damage, it may activate again at a lower temperature. There is a thermistor to monitor lamp temperature, and a thermistor to monitor optical block temperature. the only way I could think off how to fix it, is by disassembling it and trying to see which thermistor is giving you trouble. Found the part of the service manual that would be of interest to you. Has the schematics and the layout. Hope this will get your projector to shine again. It is right on the bottom of this page Projector Repair under support documents. Hope this helps, good Luck.
