HD20 flickering color light issue (Color wheel sync)http://www.avsforum.com/avs-vb/showt...65581&page=103
color wheel, thanks, Rew452http://www.avsforum.com/avs-vb/showt...165581&page=97
cleaning instructions / opening, thanks lostsole1976
Thanks very much to the two guys who posted these informative threads. After cleaning the projector using Lostsole's guide (Breaking a couple of clips of course) I still had what I believe to be the problem now, a color wheel sync issue. After running my hd20 on High Altitude for months the issue set in and HA no longer helped.
After thinking about Rew's color wheel replacement I opened her up again to have another look at the situation. He suggests cleaning the sensor that times the wheel, its attached as an assembly so I popped the wheel out for a closer look. Looked fine...
This is an assumption and I would very much like anyone having the same problem to try this and confirm or deny the solution.
The sensor detects a little black tab on the wheel axis, mine was melted/ partially missing. I replaced it very carefully (Wheel being fragile) using dark blue electrical tape and a sharp craft knife.
Thankfully the original was still half there; I scored the leading edge of the remnant with my knife and peeled off the remainder. after cutting an appropriate width of tape I replaced the orginal following from the scored mark. I wasn't sure of the length of tape so I estimated it off of Rew's pic of his new color wheel... Put it all back together... color still wrong but no flicker
Pulled her all apart again... I thought for a while and had a beer...
The new tab of tape the sensor uses needs to be a certain length (obviously) The original piece lines up with the edge of one of the segments on the color wheel, my piece was too long I thought. I trimmed (Carefully) using the other edge of the same segment on the color wheel as a guide. press the tape down firmly. bang it all back together
For me; Problem solved, cost literary nothing, didn't take more than half an hour. Most expensive part... 1 beer
PS projecotor bulbs are fragile and shouldnt be moved while hot