has anyone had mitsubishi dlp bulb...

[bandphan]

Burn out early? My set is less than a year old and on a upc. The housing for the buld has heat marks on the mesh screens, and was wondering if anyone else has had this expierence.

 

[Johnd]

No. I don't have that set. How many hours are on it, has it been put through many cycles, and are you certain it hasn't been subjected to a surge, spike or shortage?

 

[Exit]

Here is someone with a similar bulb life situation on a rear projection I believe: Mitsubishi WD-57732 bulb replacement

http://forums.audioholics.com/forums/showthread.php?t=42007&highlight=dlp+bulb

 

[bandphan]

No. I don't have that set. How many hours are on it, has it been put through many cycles, and are you certain it hasn't been subjected to a surge, spike or shortage?

its on the ups in case of power outage, and panamax line protection, it definetly failed cause it went slowly.

 

[GlocksRock]

I've had mine since Late Dec. and so far no issues.

 

[Hi Ho]

The mercury lamps used in rear projection sets are quite unpredictable. It's hard to say a bulb failed "early" because there really isn't a specific lifespan. Some will last for years, some will last less than a year. Usage patterns and number of hours on the bulb make a big difference. Frequent power cycles and excessive hours will dramatically shorten a bulbs life.

 

[yettitheman]

Here is someone with a similar bulb life situation on a rear projection I believe: Mitsubishi WD-57732 bulb replacement

http://forums.audioholics.com/forums/showthread.php?t=42007&highlight=dlp+bulb

That's me

2 main factors that determine bulb life:
1: DUST. The bulb is actively cooled with a fan that pumps air into the housing. There is a metal screen that filters out dust, and it gets clogged rather easily depending on how dusty your house is/gets.
2: Time on, and frequency of on/off cycles. Time on, because the bulb is running and generating heat, and on/off cycles because power tends to inrush the bulb when turning on, and when cooling off and then turning on the TV almost right away again, the bulb goes from cool to hot.

Replacing the bulb isn't difficult, and at minimum, the manufacturer estimates the bulb life at a year. Some people have gone 3 years, others, shorter.

 

[bandphan]

the tv does get heavy use, and with 3 pets the dust can build up, although the electronics are cleaned bi-weekly, and throughly 1 a month. I expected 3 years based on sets i had placed in customers homes since about 03. What threw me off was the mesh screen having noticeable heat marks. Any way thanks yetti and the others the bulb will be here tomorrow.

 

[Exit]

I would be greatly disappointed a the prospect of buying a rear projector bulb for probably $200 every year even if I used the TV 24/7. Hopefully in the statistical distribution of bulb life you have got a shorter life bulb and maybe the next one will be longer.

 

[yettitheman]

the tv does get heavy use, and with 3 pets the dust can build up, although the electronics are cleaned bi-weekly, and throughly 1 a month. I expected 3 years based on sets i had placed in customers homes since about 03. What threw me off was the mesh screen having noticeable heat marks. Any way thanks yetti and the others the bulb will be here tomorrow.

Yeah, the heat marks are normal, as my IR thermometer shows about 210 Degrees F (although I don't know how well my beam was placed seeing that I couldn't get to the back of the tv easily).

Just don't touch the bare bulb with your skin or touch your skin with gloves on! It's the oil, not so much the bulb caring if you touch yourself or not

 

[yettitheman]

I would be greatly disappointed a the prospect of buying a rear projector bulb for probably $200 every year even if I used the TV 24/7. Hopefully in the statistical distribution of bulb life you have got a shorter life bulb and maybe the next one will be longer.

I forsee in the future a retrofit to these older TV's to use high intensity LED or Laser diode light source units. These TV's might be old by then, and newer, better ones will be out, and someone will figure out a way to put a LED/Laser in there that can last indefinitely.

Eh, the worst thing to replace is the Color Wheel (aka, what I call the Wobbulator of Doom). You almost might as well get a new TV if that goes out...

 

[MUDSHARK]

I had to have the wheel replaced last summer, just a month before the two year warranty expired. I also replaced the bulb at that time and kept the old one as a temprary replacement. I may have been at fault for the wheel by moving the set to access the bulb, though. The bulb as about $150 so three years if I can get it seems reasonable.

 

[bandphan]

paid 145 plus 30 for overnight, not bad considering mitsu wanted 226 + shipping, i get no discount on parts from my distributer .

 

[Hi Ho]

I have never seen/heard of a color wheel in a Mitsubishi DLP going bad. The only brand I've ever seen with bad color wheels is Samsung.

 

[yettitheman]

I have never seen/heard of a color wheel in a Mitsubishi DLP going bad. The only brand I've ever seen with bad color wheels is Samsung.

True. One reason I moved to not get one; the Samsung's seemed to have too many problems, even though the PQ was ok. The Mitsu seemed better PQ wise as well as reliability.

Honestly, as much as I've dealt with Samsung, they aren't the greatest. Do a search on A,C, and S LCD panels. Angry people right there