Burnt PBS array
Hi I have a panasonic PT-AT6000, its got in excess of 10,000 hours on it just starting its forth lamp, I though the third lamp was failing as the brightness had dropped substantially and the hour meter said it was at 4900 hours. Also a red tint appeared at the bottom of the screen and a green tint at the top. (projector is mounted upside down on the ceiling) also the whites appear as cream. I fed it the new lamp and it was only slightly brighter. I proceeded to dismantle the projector thinking it needed a good clean. I took out the prism block, the LCD's looked perfect, next i took out the light guide, the polarizers looked dusty, took the lid off the light guide and found the problem, the PBS array was black in stripes, burnt looking. Also there is what appears to be sticky smoke / vapour coating all the lenses and dichroic mirrors. Question is can i simply remove the pbs array and clean up the optics and re assemble the projector. Can i clean off the burnt material, seems pretty burnt on, tried scratching it off with a screwdriver had little effect. Or bite the bullet and buy a new pbs array. its expensive about 200 euro. Any Ideas the part number is TKGP5494 what does the polarising beam splitter actually do?