Panasonic PT-56DLX25 Service Manual page 45

CAUTION:
Be sure to perform the Focus Adjustment after turning on
the power for between 1 and 30 minutes.
a. Focus Adjustment
1) Press the CH UP/DOWN key on the remote to select
"DDP" on menu and press the ASPECT key 5 times to
select "Cross hatch".
2) Confirm that each of the pixels in the center are clearly
visible.
<Cross hatch>
3) If not, loosen the Knob on the Projection Lens until the
Knob can be moved.
<Front View>
Fig. M1-5
4) Adjust the Knob by moving up or down so that each of
the pixels in the center are clearly visible to obtain the
best focus.
5) Tighten the Knob.
Note:
Focus Adjustment is not normally necessary. Perform this
adjustment only if necessary.
Tighten
Knob
Loosen
Up
Down
b. Mechanical Picture Position Adjustment (Tilt)
1) Press the CH UP/DOWN key on the remote to select
"OPT HPOSI" on menu and press the VOLUME UP/
DOWN key on the remote.
O P T H P O S I
O P T V P O S I
2) Loosen the 4 Screws on the Optical Block Unit.
Projection Lens
Screw
Twist
Screw
4) Adjust the Projection Lens by twisting so that the long
line "g" and the long line "h" are within 4 dots. (The long
line "g" and the long line "h" should be aligned
horizontally.)
Note:
O P T H P O S I
O P T V P O S I
"G" <Focus Screen>
long line "g"
"G"
If the Projection Lens is twisted left, the Focus Screen twists
left.
If the Projection Lens is twisted right, the Focus Screen
twists right.
5) Tighten the 4 Screws to fix the Projection Lens.
43
PT-56DLX75 / PT-61DLX75
8 0 0 0
8 0 0 0
<Focus Screen>
Screw
Twist
Screw
<Front View>
Fig. M1-6
8 0 0 0
8 0 0 0
"H"
long line "h"
within 4 dots
"H"