Projection bulb shuting down then coming back on . Thought problem was not enough air flow due to a fan not working but fan was ok.We have four of these in a sports bar,I have replaced lamps in them but have not seen this problem. I am a electronic tech for nasa. Any help would sure be great. Unit may run 3 or 4 minutes or may run 10, there is no set pattern.
I experienced a similar problem with my Sony KDFE60A20, the projection bulb would turn off for about 90 seconds and come back on for the same amount of time then cycle off and on for about half an hour. I cleaned the circulation fan in the rear turned the tv back on and it was ok for the rest of the day. It started all over again the next day so I then took a look at the bulb, I found that the bulb has a venting/cooling screen at the top and bottom of the lamp holder, the top screen was plugged with dust, cleaned it and put it back together and the problem has been resolved now for 1 week. Seems like the problem has been resolved. Tv is exactly 18 months old and is connected through an APC UPS Backup.
I had this problem and ordered a new replacement
XL2200 lamp from Sony and that fixed it. By the way, the lamp installs
from the front so there's no need to pull your TV out from the wall.
Look at you manual, it is accurate in this respect. My lamp only lasted
about 15 months. It costs $200 plus about $16 to ship. You can order
direct from Sony on line service.
Confirm if this is happening during explosions screenshots or high white tones images. I noticed that my set goes black immediately after an explosion or during commercials (Essurance commercials for example). I'll have a technician tomorrow to replace the power board (another problem), but I'll also show him my observations to get his feedback about the blank screen...will let u know!!!
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Could be the fan. It will cool tv but could also be to much for tv to handle.
You can also try reseating the lamp. It may say ok but be wrong.
I have a Mitsubishi 5500 projection tv . have had the type of issue you have had and I have replaced a lamp as well.had to reseat the lamp three times before it worked without shutting down.
Hope this helps.
hello Harley, Lamp # 1 is lamp fan, Lamp # 2 is DMD board fan. Lamp # 1 is located behind the lamp. Pull assy angine out you will fine fan # 2 , clean it or replace it if not rotate properly. Fans displayed on screen because fans are dirty or air flow not smoothly. Good luck.
The Lamp Fan should be open enough to clean. I wonder if the fan is turning at all causing the error to occur. It is always good to keep all the vents clean so air can circulate.
Hope this helps,
Make sure all Airways do not have alot of dust builted up blocking Airways this can cause Lamps to Blow, also keep in mind these sets are only desinged to play between 5000 to 8000 hrs you cannot leave them on day and night like regular TVs,and yes New Lamp does not mean that it was not Defective sometimes companys do have a run as to where they have alot of defective Lamps it Happens
there are several things that need to take place for the lamp to turn on. first the color wheel needs to turn on ( if you can hear a whinning noise then this is fine) next the tv will send a signal to the lamp ballast to turn on, and the ballast needs the 130v dc supply from the power board ( simoly remove the lamp and reinstall the lamp door, turn tv on, and if you hear an arcing noise from the ballast you know this is fine too. the board that controls all of this is the dmd board. so if the color wheel works, ballast starts then i would replace the dmd board....
Remove the lower front panel by removing the 2 large round screw heads at the lower back corners, one on each side. Remove the retaining screw on the right side of the metal horizontal retaining strip in front of the bulb holder, remove bulb retaining screw in the upper left corner of the bulb holder. Pull the bulb holder out towards you and check for dust build up on the top screen on the bulb casing, if there is an abundance of dust it will restrict the airflow across the face of the bulb which causes it to heat up and turn off. Once the dust has been cleaned your bulb should now work as it should without a problem.
Check if the condensar ( outside fan unit) is getting enough free ventilation. IF there is no free air flow you will mostlikely be triping the unit due to short cycling. Ie the unit is pulling its own discherge air causing the compressor to trip due to high back pressure