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2010 Mitsubishi 3D DLP Owners Thread (638 series) - Page 46

post #1351 of 1359
Quote:
Originally Posted by engineerglen View Post

Hi to all, Well, with all this talk about lamps I am starting today to test the 2 lamps with housings that we got from Amazon in Feb of this year, I think it was like 63 bucks total for two lamps. The WD-60638 that I am using for the test has been working just fine, but if the new spare blubs are no good it would be better to know now and not in another year. I am not sure how long to run them for a test, maybe a week, I will be back with an update. The brand of these is Electrified with the part number of 915B441001, the two screws on the housing are a little different, I had to use a flat screwdriver on them, but other than that they look the same.

Hi to all again,

Somewhere around 12 or 14 minutes, that is all the time on the first new spare lamp before it started acting up with color flashing, jumping around. The rate of flicker gave me a headache. I turned it off for a ten minute rest, then back on and about 10 minutes later the same breaking up of the colors, it was hard to look at, the flickering was really bad. I let it cool down for 5 or 7 min. put in my other spare lamp, this one ran for the rest of the night ok. The 638 has no adjustments for lamp control as far as I know, so it is all on the lamp to perform. I will leave this working lamp in and see how it goes for a few days.
post #1352 of 1359
Quote:
Originally Posted by Augerhandle View Post

I always recommend buying the lamp from Mitsibishi. I have seen countless posts from people whose TVs didn't work after they installed bargain lamps.

Countless +1.
post #1353 of 1359
Quote:
Originally Posted by Lucid69 View Post

Sounds like a defect bulb or that the bulb is going. There might be a fix if your particular series of HDTV offers that feature and that's to set the bulb setting to a "high" setting. That should resolve the issue but that depends if you're HDTV has such a feature/setting. Otherwise crack open the wallet and get yourself a new bulb. FYI - I have a 73C11 and got "flickering" issue in the top right corner. And as you've mentioned it's only noticeable on high contrast images. I resolved the problem by turning the bulb setting to high. Others have reported the same problem which is most likely the result of a defective bulb or bulb that's about to go. For me, it's probably a defect in bulb since my set only has approximately 500 hours. You could try to remove the bulb and clean the connections. Hope that helps.

I have the 60c10 with the exact same flickering problem, primarily in the top right of the screen. Im not sure if it is possible to change the lamp brightness settings with this model, i did buy a somewhat cheap lamp on amazon that lessened the flickering a little but it is still there.

If anyone knows if there is a way to change the lamp settings with this model, or of an official bulb will fix the problems let me know, (not wanting to spend the money on an official bulb without knowing if the problem will go away or not)

Thanks.
post #1354 of 1359
Quote:
Originally Posted by Xelnok View Post

I have the 60c10 with the exact same flickering problem, primarily in the top right of the screen. Im not sure if it is possible to change the lamp brightness settings with this model, i did buy a somewhat cheap lamp on amazon that lessened the flickering a little but it is still there.

If anyone knows if there is a way to change the lamp settings with this model, or of an official bulb will fix the problems let me know, (not wanting to spend the money on an official bulb without knowing if the problem will go away or not)

Thanks.

I've been recommending buying Osram or Phillips lamps from ShopJimmy or ReplacementLightBulbs.com. Both of the Osram lamps I bought lasted about 4800 hours before the flickering showed up. Both sell them for about $70 shipped or around $110 for the complete housing. I've heard the Philips last even longer but my OEM lamp was the Osram 150-180w, so I'm sticking with that.
post #1355 of 1359
Quote:
Originally Posted by jevans64 View Post

I've been recommending buying Osram or Phillips lamps from ShopJimmy or ReplacementLightBulbs.com. Both of the Osram lamps I bought lasted about 4800 hours before the flickering showed up. Both sell them for about $70 shipped or around $110 for the complete housing. I've heard the Philips last even longer but my OEM lamp was the Osram 150-180w, so I'm sticking with that.

Just wanting to verify that buying a better lamp would fix this flickering problem that i am having, i am still in the return window for the bulb i bought on amazon, so would returning it and getting one of the more expensive official ones fix the problem? (Not wanting to spend $100~ just to have the flickering start up right after installation).

Thanks alot.
post #1356 of 1359
I wonder if the bargain basement lamps are jacking up the ballasts.
post #1357 of 1359
ive had my 60638 for over 2.5 years now and have noticed some flickering also...so i think my bulb is on its last legs. when it does finally go i am going with the official bulb. I have my tv on for like 24hours a day some days...i notice the flickering in the early viewing hours and it usually goes away once the tv is on longer.
post #1358 of 1359
I just replaced the bulb in my 65738 with a Phillips from shopjimmy.com. The original was an Osram that lasted 12500 hours. I noticed the bulb going bad when the TV went very dim for about 3 days, then it stopped working. I installed the new bulb and it was like having a new TV again. I never realized how the picture dimmed gradually over time. That was yesterday. This morning the kids were watching TV and after 20 minutes or so the flickering problem started. We would turn off the TV off and on and it would stop for a few minutes, only to come back. We had the set off for a few hours then turned it back on, it lasted maybe 20-30 minutes this time, then came back.

I'm starting to think that this is somehow heat related. The new bulb is working properly but some other component in the back is aging and can't handle the heat generated by the new bulb. I lowered the energy setting to standard instead of bright, then set the brightness all the way down. The TV has been working for about 45 minutes now (dim, but watchable.)

Luckily I'm under ABC Warehouse warranty, so it's a wait and see as to what they will do to fix the problem.

I just thought I'd post my experience, for what it's worth. I love this TV! It looks so much better than any LCD's I've seen.
post #1359 of 1359
Got my bulb today direct from Mitsubishi and looks great. Much brighter and no dark corners. Worth getting from them: Here's the part number I got. 915B441001 LAMP (180W) (V43/V43C/V43+/V43++) 'G'
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