Noisy colours/dark shading and colour banding on Optoma H30!
When watching a dvd certain colours or foggy scenes have a lot of flickering specks and scenes where a colour is supposed to bend into another colour (picure a sunset that is dark at the top and gradualy gets light near the horizon) there is colour banding or stepping. Like bands of differen shades not smooth shading. I've tweaked and used Digital Video Essentials and tweaked again and I very frustrated by this. PLEASE SOMEONE HELP!
I did send it in for cleaning to optoma and since the the pic quality has gone down hill!
I have an Optomoa H27 which has the same color banding issue. When I got a new bulb, the banding appeared after an hour or so. Now after 1000 hours on the bulb, the banding appears after 15 minutes. I have carefully removed all dust and lint every two months. It doesn't seem to make any difference. I have also reset the settings on the projector. Again, nothing. Any ideas or suggestions would be very appreciated!
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Hi, I had a similar problem - the screen flicked through blue, green and red sometimes with a slight ticking noise. The problem seems to be that the colour-wheel is getting stuck - the first time this happened I sent it back to optoma who gave it a clean - it has happened again since thouegh and I just took the case off (you'll be able to see the colour wheel under a black plastic flap - remove the flap) I then used a cotton bud (q-tip) and turned the colour wheel whilst lightly pressing the cotton bud against the wheel - I also gave everything a blast with a can of air. My HD72i is ceiling mounted - optoma suggested putting the hoover pipe across the vents every now and then to keep the dust down. Essentially it's dust that is stopping the movement of the colour wheel.
Most DLP projectors have a colour wheel. It's usually hard to get at,
and you may have to actually remove everything including the optical
block from the projector to access it. This wheel turns on a motor just
like a fan, and if it gets dirty it can act up just like a fan.
They are expensive to replace, so you might want to try taking it apart
and cleaning it out. Add a small amount of 3 in 1 oil to the motor if
I had a similar issue with my EP739, the problem would start after about 3 or 4 minutes and then get gradually worse and worse.. The most strange thing I noticed was that white looked fine. And if you opened the configuration menu in the projector it appeared that blue was labeled green and green blue.. Some sites suggested cleaning the machine of dust, which I tried using a can of compressed air... This did not fix the problem at first.. but when I had it apart I studied the colour wheel for a little while and wondered if some how the machine was synching to it incorrectly somehow.. So I blew out the colour wheel location sensor (It's kind of obvious being the only component mechanically connected to the color wheel. Much to my delight, this fixed the problem...
So my solution to the flickering / colour fading / colour swapping issue with DLP projectors was to clean out the dust from the colour wheel location sensor..
In fact, if I did it again, I would ONLY clean the sensor, and leave the rest of the dust alone. Blowing dust around has the potential to cause other issues, especially if it winds up inside the optics system.
hey i have the same prob with mine (same model) but it only happens when i send the picture through the rca video in. if i use my pc and use the 15 pin plug, it works fine. i cant explain why it happens, but i jus know it happens.