Panasonic PT-40LC12 Service Manual page 37

(Tilt Adjustment)
Note:
There are 4 hex nuts "c1" "d1" "c2" "d2" on the Projection
Unit.
Hex nut "d1"
Hex nut "c1"
Hex nut "d2"
Hex nut "c2"
Fig. 4-7-1
7) Remove the hex nuts "c1" and "d1" using a 10 mm hex
wrench.
10 mm Hex wrench
Hex Nut "d1"
Fig. 4-7-2
Projection Unit
Hex Nut "d2"
Hex Nut "d2"
8) Adjust the Projection Unit by turning the hex nuts "c2"
and "d2" using a 10 mm hex. wrench so that both width
in the top ("C") and in the bottom ("D") become same.
Then, the right and left marks are almost centered as
shown.
Note:
If the hex nut "c2" are turned clockwise, the Right Focus
Screen moves up.
If the hex nut "d2" are turned clockwise, the Left Focus
Screen moves up.
left mark
left edge
of screen
up
F O C U S
down
<screen>
"D"
bottom edge
of screen
Fig. 4-7-3
8) After adjusting, install the hex nuts "c1" and "d1." Then,
tighten the hex nuts "c1" and "d1 while fixing the hex
nuts "c2" and "d2" by using a wrench.
top edge
of screen
"C"
up
down
right edge
of screen
right mark