Quote:
Originally Posted by
Mr.G 
Good to hear your eyesight is fine.

One question. How did you manage to get 4458 hours out of a bulb rated for 2000 hours? The projector is supposed to blink a yellow light indicating a replacement is necessary.
That yellow light, that's on top of the PJ, right? It sits on a shelf, I may not have noticed it blinking.

Honestly, it seems bright enough to me, even with the iris minimized, which it has been since the beginning. However, the front of the lens is 9'8" from the quite white screen and the room is in virtual complete darkness (windows have venetian blinds and I have black velvet curtains that I draw shut). Even in daytime, it's almost pitch black in there.
It might help that the PJ is on a shelf with lots of space around it, so it gets good ventilation, plus I clean the filter and dust bunnies periodically. I do occasionally use it with the room approaching 85 F, but usually a lot cooler. When running at those higher temperatures the fans go into hyper speeds, but usually they are at the lower speeds.
I just made an adjustment, being tightening the screws holding the fan that was rattling and striking some surface. I managed to tighten all the screws and I dabbed contact cement on them, so they shouldn't loosen again. It'll be my backup PJ when I get the replacement.
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Here's some information I saved on the Z2's bulb life way back when I got it:
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Z2 bulb life - the nitty gritty -- 11/21/2003
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shrugger
Member
Registered: Jul 2003
Location: Northern Virginia, USA
Posts: 49
quote:
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Originally posted by Muse
What's the scoop on the bulb life for the Z2? I know that Sanyo doesn't provide life expectancy figures in the specifications. 1000 hours is a figure someone got somewhere. Is this the least bit realistic? Why so short? Many PJs have bulbs speced at 3000 hours. Is it really not possible that the Z2's bulb will last this long? Especially if used in low lamp mode? As I understand it, the PJ keeps track of hours and after X amount of hours you are informed somehow that you should replace the bulb. What happens if you do not? Is there any danger if the bulb fails? Presumably the bulb gets dimmer with time, but that effect starts happening almost immediately. I haven't seen a curve. Is there anywhere you can see a curve? If you're not unhappy with the brightness of your PJ, why not keep the bulb until either you are unhappy with the brightness or it blows out?
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Sanyo generally does not provide bulb life figures, and I can't really blame them. Everyone's lamp life numbers are pretty bogus, because there are so many variables involved outside of their control- ability to dissipate heat where it's installed, pollutants, average length of time used per sitting, "hot restarts," etc.
Bulb life is largely a marketing gimmick at this point in the technology- witness the X1 bulb life numbers being changed from 3,000 to 4,000 right when they went into a big production run (using the exact same bulb).
Each Sanyo operating region prints their own product literature, some of them have put specs to bulb life (3,000 in low lamp mode)- but I wouldn't put any more stock in these numbers than anyone else's.
Every projector using a UHP lamp is using a bulb made by Phillips. They all use the same basic technology in slightly different form factors.
UHP lamps (like the Z2) are generally rated at up to 4,000 hours, while UHM lamps (like those used in the AE500) are generally rated for 1,000-2,000 hours. Don't take my word for it- check projectorcentral's bulb FAQ.
Note that Panasonic rates the AE500 at 2,000 hours. At most, Sanyo rates the Z2 for 3,000 hours (when they could easily claim 4,000).
Panasonic, like most manufacturers, rates at the very top end of the scale. Sanyo, is far more "honest" than most companies. Think of them like Onkyo in the amp world. Unfortunately, their very honesty is held against them, because it becomes some sort of conspiracy to hide data when a few people post about bulbs dying at 500 hours. Every bulb can die in 500 hours if it's in a bad batch or not treated properly by the user, but since Sanyo doesn't publish specs, everyone treats these few examples as the gospel for Sanyo bulb life and refuses to listen to those with very different experiences. AAARRGHHHH!!!!!
On the question of replacing bulbs- it is possible (though rare) for bulbs to explode when pushed too far. If they explode- your projector is history. And- it is rare for people to be happy with the brightness level of the bulb after a couple thousand hours. So, my advice is- why put up with a poor picture and the risk of destroying a $2,000 piece of equipment to save $300 on a new bulb that should last you 1-3 years?
Sick of the bogus Sanyo bulb life garbage-
Shrugger