[Phat Phreddy]

Perhaps it is simply me becoming more and more critical of my Hitachi's image but....


I am now noticing a color shift issue.... It manifests itself on pure black images... The bottom left and top right are a little greenish and the band running top left to bottom right is the (known about) blueish purple....


Its one thing to work on a filter to effect overall color but this is now another thing bugging me.... and attaning a full balance is not (so far) possible....


I have heard of calibrators adjusting the polarizor plates... Is this a (technically OK skilled) user thing ??? I know zonal shading is a JVC 150 feature but not on the budget Hitachi....


Any suggestions ??

 

[tycoondog2]

Hitachi has zone shading

 

[Mark Hunter]

Phat,


It's called "C. Unif." in the service menu. You can adjust many different "zones" at different intensity levels, so should be able to get the coloration correct at just the low light levels without messing up the rest of it.


Mark

 

[Phat Phreddy]

OK Thanks thats nice to know..... Before this gets dangerous... Anyone got a service manual link or can email it if its not too huge (seem to remember this before but dont have it)...


Also will settings like the zone shading survive after a dilard calibration ???

 

[pepar]

Quote:

Originally posted by tycoondog2 The perfect Margarita one is just right two is too many three is never enough

From my experience, it is: One is too many and two's not enough. But we could discuss it - over margaritas.


(Sorry, a bit of topic. But I couldn't resist.)

 

[tahustvedt]

Check out my color uniformity thread. There's a link in my signature. It covers the C-unif on New Hitachi projectors.



Tor Arne

 

[rbrande]

Phat,


I have the same problem on my unit. It is the "black" (IRE=0) that is purple on part of the screen and green on other parts. The zone shading can only adjust the color for higher intensities (e.g. IRE>~10).


See also this thread:
http://www.avsforum.com/avs-vb/showt...hreadid=164099

 

[Alan Gouger]

I tried this and found it has no effect on the 10IRE or lower and thats where the problem lies.


Its also very easy to mess up the mid range if you do not know what your doing and very difficult to get it back. For some reason the control interacts with other zones and at different light levels.


Be careful.