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– 41
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
Switch to the focus adjustment mode with the remote control, and use the ▼ button to first offset the
whole focus.
2
Use the ▲ button to stop at the place that first becomes just in focus in any of the directions of the
screen. (In this state, the just-in-focus point is at the back of the screen in the direction in which the
focus is offset.)
3
Remove the lens cover and lens.
4
Loosen by two turns the fixing screw of the direction that is opposite the direction in which the focus
is most offset (direction in which the just-in-focus point in
2
is the most offset toward the back) (see
Figure 4).
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
Install the removed lens.
6
Turn the adjustment screw counterclockwise little by little and stop at the point that is in focus. Turning
the screw counterclockwise moves the lens bracket of the mounter forward (screen side), which
changes the tilt of the lens (see Figure 1) and moves the focus point in the projection image on the
screen in the opposite direction to that of the adjustment screw.
7
Changing the tilt of the lens also changes the screen position of the projection image with regards to
the screen surface, so use the remote control to switch to the lens shift adjustment mode and return the
position to the optimal position.
8
Perform refocus adjustment around the centre of the screen, and make even finer adjustments of the
rotation amount of the adjustment screws if the focus is still inadequate.
9
When adjustment is complete, remove the lens and then tighten the loosened fixing screws.
j
Install the lens and cover again to complete the focus adjustment.
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