Shuts lamp dwons as if over heated. Lamp 4200 hours.
The projector shuts down as if over heated. Lamp on low, filters clean, fan on high. Cold start and it runs for approx 1 h, then shuts down and automatically starts again. Runs for 20 minutes shuts down and so on until finally the projector has to cool down for an hour and the pattern starts all over,
Have a new spare lamp at hand. Could this very old lamp cause overheating? Or is there a malfunctioning heat sensor etc that shuts down the lamp?
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Could be a heat related problem or the lamp is going bad. On a cold projector ( off for 30 minutes), pull out the lamp and look at the little filters on the lamp housing. If they are clogged, used can air to clean them. Also clean the input filter on the side of the projector.
if it goes through shut down mode (lamp first and fans run a while), reset the settings to factory default. while you're in the menu, check the lamp hours (under settings). if they're close to 2000 hours, replace the lamp. if the projector shuts down immediately, fans and all, you have a power supply problem. you'll need to replace it.
reason for fan spinning at high speed after shutdown is to cool down the projector after it has been on
you will feel hot air from exhaust as this is taking the heat away from the lamp, where all the heat is generated
if it shuts down after 20 mins either the projector is blocked, maybe, a fan is not running, filter blocked, or the motherboard is now u/s
Just a quick couple of notes about your projector. It is a DLP projector (not LCD) and as such the machine as no air filters to clean. It does have air intake and air exhaust grilles, but no air filters to clean. This next part comes directly from the owner' manual for your projector:
When the lamp operation time exceeds 2000 hours*1 *2, the projector automatically shuts off and can’t be used until the lamp is replaced and the lamp operation time is reset.
Your machine is designed to give visual warning messages at 1500 hours used, and 1900 hours used. Did you see any visual warning about lamp life over the past few months?
If you were experiencing an overheating problem, a "TEMPERATURE!!" message would flash up on the screen just before the unit shuts down. If there is no warning, you don't have a heat problem.
If you have a replacement lamp available, install it and reset the lmap hours according to your user manual. If you don't have the manual, google it on the web (it available).
ALSO CHECK YOUR FAN. IF THE FAN OR A HEAT SINK IS NOT WORKING PROPERLY (I.E. THE FAN MAY JUST NEED TO BE CLEANED OR REPLACED, THERE SHOULD BE A SMALL HEAT SINK. IF CLOUDED W/DUST, IT WILL KEEP THE OPERATION SHORT). ALSO CHECK IF YOU HAVE SET ANY TEMPERATURE SHUTDOWN PARAMETERS. IF YOUR LAMP HEATS UP FOR SO LONG AND REACHES A TEMPERATURE THAT WILL AFFECT THE CIRCUITS, THIS OF COURSE WILL SHUT DOWN YOUR UNIT UNEXPECTEDLY. HOPE THIS HELPS...JGUAM