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Basic Operation
If the lens is heavy or the projector is installed so that it is tilted, the lens may be tilted, resulting in the focus
becoming unbalanced.
In such a case, refer to the figure 4 and table below, and follow the procedure below to perform adjustment.
Adjustment procedure
z
1
Display the internal test pattern grid, and defocus the image.
2
Adjust the lens focus till one or more sides of the grid comes into focus. Note the appropriate screws
for the out-of-focus sides of the grid as described below.
3
Remove the lens cover and lens.
4
Loosen the locking screws for each of the adjustment screws a, b and c as needed, following the
indications in the example. The screws to be adjusted correspond to the out-of-focus sides of the
image.
Attention
Be careful because turning a screw more than twice to loosen it will result in the spring becoming detached •
and the projector needing to be repaired.
Make adjustments in up to two places, and fully turn the screw clockwise in at least one place.•
5
Reinstall the lens. The adjustment screws can be accessed through the lens flange.
6
Turn the adjustment screws (corresponding to the locking screws loosened in step 4) counterclockwise
slightly till the out-of-focus image sides are in focus. (Turning the screws counterclockwise moves the
lens bracket and tilts the lens toward the screen.)
7
Readjust the lens shift position with the remote if needed.
8
Refocus the image as in steps 1 and 2 above. Fine adjust the focus evenness as needed, as described in
step 6.
9
When adjustment is complete, remove the lens and then tighten the locking screws.
j
Install the lens and lens cover.
Tool to be used: Allen hex socket driver or Allen wrench (2.5 mm diagonal hexagon)
An Allen wrench is supplied with the ET-D75LE6 and ET-D75LE8 optional lens.
Figure 4 : Relation between the adjustment place and adjustment screw
V up
H left
H
right
V bottom
cb
ac ab
b c
a
c a b a
Projector
Screen
Adjustment place: The place where the just-in-focus point is at the back.
When optimal focus
point is at front of screen
for V up
When optimal focus is
at front of screen for V
bottom
When optimal focus is at
front of screen for H left
When optimal focus is
at front of screen for H
right
a
Turn counterclockwise
b
Turn counterclockwise Turn counterclockwise
c
Turn counterclockwise Turn counterclockwise