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Do I need to replace my Bulb?

post #1 of 13
Thread Starter 
Hi guys,

I currently have a Mitsubishi WD-52725 DLP set that i've had for just over 2 years. I have not replaced the bulb yet in this time as I still see the picture fine. The only issue I'm having is I'm not noticing the screen necessarily dimmer, it's just things are starting to get pretty washed out. Like my blacks are no where near the black levels when I first got the tv, just washed out.

Do you think this is a system of the bulb dying or would I notice the screen very dim where you could hardly see anything first?
post #2 of 13
It's not the bulb. Check you settings and try to adjust them to see if you can correct the problem.
post #3 of 13
Fine dust inside the set can do that. Do you have an access door that allows an inspection?
post #4 of 13
Thread Starter 
We do have a lot of dust in our area. I noticed pictures of people replacing lamps that it contains a mirror there. Would it be worth opening that door and cleaning dust of the mirror? If so... what can I use to clean dust off the mirror? Will using an old t-shirt with lightly damp soapy water work?
post #5 of 13
I'd start with a feather duster applied very carefully. The thing you really want to avoid is putting pressure on the mirror or lens. It worked for me on my JVC.
post #6 of 13
Get yourself a calibration DVD to properly adjust your basic settings. No, I would not change the bulb until it blows. And no, I don't think it's a dirty mirror. I believe the light engine is pretty much sealed in DLPs.
post #7 of 13
I'm not sure if I'm having exact same problem as Zurion, but my WD-62528 is loosing most of its detail in dark scenes.

Previously I had Brightness and Contrast centered, 50/50. Lately to see an action scene that is dark I have to move them both up to 75%, otherwise you can't see what is happening. An example of a problem scene would be the action flight scene at the end of Fantastic Four. The problem with this is when I increase these two settings it washes out normal scenes.

I have cleaned my protective screen, as well as, my normal screen. I have even cleaned my bulb and filter.

Is this a sign of the bulb dying? Would there be a visual benefit to replacing the bulb before it failed?

Thanks for the help.
post #8 of 13
Hi All,

I kind of have to laugh. I've been a lurker here for about 3 months prior to purchasing a new Samsung LED/DLP. In that time I started noticing or "perceiving" all kinds of defects in my current Sony RPTV. "Is that a geometry issue?" "Is the TV getting dimmer?" "Is my bulb dying?" Mostly I found that any issues I was seeing were more typically related to output quality.

I am curious though....when you folks have had to replace bulbs, did they go dimmer and dimmer over a lenghty period of time, or did they get dimmer and fail rapidly? I assume that they don't fail like a typical light bulb, is that correct?

I just can't determine if my old RPTV is actually getting dimmer, or if it's my imagination.

Any input would be appreciated.

MikeB
post #9 of 13
Hi i need info if is any on MY RCA D52W20 rear Proyection TV
post #10 of 13
Quote:
Originally Posted by MikeyBWindsurfer View Post

...when you folks have had to replace bulbs, did they go dimmer and dimmer over a lenghty period of time, or did they get dimmer and fail rapidly? I assume that they don't fail like a typical light bulb, is that correct? ...

My first one got dimmer over a couple of months, then went pop at 2300 hours. There was broken glass in its base. Replaced under warrentee, since it was within the first year. I didn't push my second one that far. It was getting slowly dimmer over several months, and I put in a new one at 6100. Glad I did because it was like getting a brand new set.
post #11 of 13
Most of these type lamps can, indeed get dimmer and "cooler" over time. With my JVC, not only did replacing it give be a much brighter image, but a warmer one as well. I spoke with a JVC tech who reported that they had changed lamp suppliers on this model and the newer ones were known to be brighter and warmer anyway. So it's hard to say whether the difference I saw was one or the other or both. Apart from the cost, it doesn't hurt to get a new one and keep the old one for a spare.
post #12 of 13
I recieved my new bulb and installed it and my picture is much birghter.

I am, however, not satisified with the picture. My biggest complaint is that on a black screen with white letters I see a glow around the lettering. I have been able to reduce this by changing the sharpness, but I haven't been able to remove it.

I'm going to try a calibration dvd this weekend. But I wonder if there is dust that has collected on a mirrow that could be causing some light refraction. If my calibration dvd doesn't help, I think I will call the local service rep and see if there is a cleaning service of some type.

Has anyone else experienced this?
post #13 of 13
I hate to be the bearer of bad news but the 25 series by Mits was really bad for dust contamination in the engine that led to a dim or poor, washed out quality picture. I see them every day, many of them. Unfortunately there's no real way to pull the engine and tear it down to clean it.

BTW, it's not sealed. You'd obviously have to have openings to allow air flow through it to cool the thing. That, unfortunately is the problem with the engines in this model. Lots of air getting pulled through insufficient filtration.
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