BenQ W1070 : DLP Full HD, 3D Ready with lens-shift for 1000$ - Page 400 - AVS Forum | Home Theater Discussions And Reviews
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Old 03-16-2017, 04:54 AM
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Originally Posted by qal1h View Post
My experience with the 1070 in a few lines:

Great projector, nice colours, bright and very good video quality, no tearing or other issues.

Few things to note, I do sometimes get the rainbow effect, only slightly noticeable, not a big issue at all.

The projector is a tad bright, i've not adjusted the settings at all but the original colour config is fine and I dont know where to start with adjusting it. We generally use it on a white wall, and the blacks aren't very deep at all.

However we got a 150" grey projector screen and the colours look brilliant, so much better than on a white wall, the blacks are now deep and overall picture quality is so much better.
Can you do me a favour? Try running the projector at 71.928 hz (using my settings above), from your PC, and tell me if that makes the rainbows disappear.

In theory, going from 60hz to 72hz could help reduce RBE since the colour wheel speed is synced to the refresh rate. And a 20% reduction is nothing to sneeze at. It's like going from a 5X to a 6X colour wheel speed. Actually, exactly like that, since the w1070 drops to 5X at 60hz so running it at 72hz likely brings it back up to the equivalent of 6X.

I've been meaning to try painting my wall gray, although reducing the brightness doesn't actually increase the contrast AFAIK, since you're cutting both white level and black level by the same amount, so the ratio between them stays the same no matter what.
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Old 03-19-2017, 01:39 AM
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Originally Posted by RLBURNSIDE View Post
The smart move here is to replace your bulb before that happens, to avoid collateral damage (which can affect other components including the colour wheel) and big messy glass cleanup after the fact.

Commercial cinemas have figured this out years ago. You do not want explosions. These bulbs are dirt cheap for the lifetime they offer. 80 bucks shipped from Amazon for 4000-5000 hours of usable lifespan is a bargain.

I would recommend to all w1070 users to replace their bulbs at no longer than 4500 hours. It will be quite dim by then anyway and time for a freshening up anyway.
Ya, that's very good advice and I am going to take it. I have one question though... I see that bulbs with housing are sold and then also just the bulbs itself are sold. Since it seems you have taken your W1070 apart (a few times ;-) have you seen heat damage or distortion on the housing that would require (or make sense for) an owner to replace the housing & bulb together? Or after prolonged usage can we just get away with replacing only the bulb at 4500 hours? Am curious to know your recommendation for someone like me who has never had to replace the bulb yet if we can just go for the bulb or also should change the housing as well for best optical performance. Cheers
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Old 03-19-2017, 12:30 PM
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Funny you should mention that, when my bulb exploded it cracked the glass in front in the housing and I couldn't order it separately, so I had no choice but to order a new housing. But the 80 dollar bulbs now on amazon often include the housing too, and it's convenient to have a spare. If you don't need it though, and nothing's broken, then definitely try to save 30 bucks and get just the bulb w/o the housing.
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Old 03-27-2017, 07:42 PM
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Originally Posted by monakh View Post
Assuming the bulb isn't bad, then yes, that's what the service manual says. I have no way to test this and neither can I test the blower to see if it is functional or not.

I took my PJ apart. It was a b*tch to keep track of all the screws. Stupid fan was almost at the tail end of the disassembly! The fan is a blower type ADDA AB5012DX-A03. It has a standard PC server type 3 pin connection. I wish I had a mainboard to test it. I ordered one on eBay for $25 from China though you can find it 30% cheaper at some wholesale Chinese stores. I just didn't have the patience to sign up and go through checkout.

I'll re-assemble the PJ in a few weeks when the new fan arrives. If this sucker works, I'll just sell it.
Thank you! I needed the blower fan part # and was not looking forward to disassembly just to get it!
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Old Today, 11:47 AM
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Just ordered a new 25ft VGA cable to get 444 + 10-bit native at 1080p 71.928 hz in prep for Creator's edition windows update:

https://www.amazon.ca/gp/product/B00...?ie=UTF8&psc=1

72hz is a winner on this projector, and finally I'll be able to get true 10-bit (downscaled) UHD content without using fullscreen exclusive mode or dropping to 422 chroma.

Banding is one of the most annoying video artifacts for me and this should cut it down by a factor of four. Hopefully without much in the way of analog signal artifacts due to using a longish-run VGA cable instead of HDMI. I'm hoping the shielding and many good reviews of this cable will bear this out for FHD projector use.

According to the service manual of the w1070 the entire signal chain internally is capable of 10-bit, including via analog inputs (VGA and component). Reason I'm not using component is because there aren't any adapters out there with native 72hz guaranteed capability, from what I could find. It might work but why take the chance? I also have a DP 1.2a to VGA adapter with 10-bit DACs in case I ever upgrade to a videocard with no DVI-I connectors on it. I believe DVI is being deprecrated on many newer cards. I haven't tested if the DP adapter I bought actually does 72hz VGA output via custom resolution but it should definitely handle 10-bit 444 at 60hz at least. Although for me I really want 10-bit + 444 + 72hz or even 75hz for gaming. Every bit counts.

These two things combined represents an effective 56 % overclock over a typical 1080p60 @ 8-bit HDMI signal. Using a VGA cable step gives us 10-bit "for free" without increasing bandwidth requirements.
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