James Sweet wrote:

Patrick Young wrote:

Did, as the green in Q had three or four pixels out. I'm now left with a
ferpect picture, however the convergence is now out two ways. The part
# is therefore not part of the alignment.

It's not? If changing to a different color panel changed the alignment
then I suspect the panels *are* different.

Sorry, I might not have been very clear there. I swapped a green _as
well_ as the blue to make a comparison. The green was swapped with the
same part # (ALT2) from the other projector, blue got red from the
other one (ALT2 going into the ALT1 slot).

There is more to it than just the part number. I suspect this has a lot
to do with how the panel is cast into it's plastic housing.

The plastic housing is then screwed in a non adjustable way on a
plate that is soldered to the prism assembly at four points. Comparing
panels, the soldering positioning varies (ie: there are larger tags on
the prism than that of the plate the panel screws to), some of these
solder points are on centre and some slightly off centre.

I'm yet to work out the difference between the LCX031ALT1 and LCX031ALT2
though. Of the 4 projectors I have, one ALT1 (blue) was totally burnt
out in that had incinerated the colour filter, another the ALT1 was
totally dead, however had not damaged anything. The remaining two still
work, however are developing a blue smear in the picture. IIRC they are
all much the same age.

After finding the ALT2 panel works in blue possie, I'm left to the
conclusion the ALT1 is the same, however perhaps a superceeded part #
that had "issues". Interestingly, it is the one closer to the lamp,
however would be surprised if it is different because it is warmer there
and there are cooling issues, however that does not make sense to me.

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