Eiki LC-XT4E, Service Manual

Page: 75 / 160

Optical adjustment
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For convergence adjustment, use Green as the reference standard. Align Red and Blue with Green by
adjusting the position and angle of the Red and Blue LCD panel. Screws X, Y and Z (Fig.61) are for convergence
adjustment. When adjusting the Green reference LCD panel, both on Red and Blue LCD panel should be adjusted
with Green LCD panel.
GREEN
Red or
Blue
Screw Z
Screw X
Screw Y
1. Display Red (or Blue) and Green color crosshatch pattern by
setting with service mode.
2. Turn the Red lines to be paralleled with Green lines by adjust-
ing screw-Z.
3. Adjust screw-X to converge Red and Green vertical lines.
4. Repeat steps 2 and 3 until Red and Green vertical lines con-
verged properly.
5. Adjust screw-Y and converge Red and Green horizontal lines
properly.
6. Repeat step 2,3 and 5 until Red and Green lines converged
properly.
7. Tighten screws-A.
8. Remove Adjustment Tool from Prism/LCD panel unit.
[Before adjustment]
Make sure each Red,Green and Blue LCD panel unit
has been correctly installed,and that all focus adjustments
have been completed before preforming convergence
adjustments.
1. Adjustment screw "Z" to turns the line.
2. Adjustment screw "X" to moves the line right and left.
3. Adjustment screw "Y" to moves the line up and down.
(Fig.61, 61a, 61b, 61c)
Line Movement and Screw Turning
Red (or Blue) Panel convergence adjustment
■
Convergence adjustment
Do not insert the object into the optical block for blocking
the light, otherwise, optical parts may be damaged.
Caution
Note; When removing an Adjustment Tool after adjust-
ment, loosen screws-B of Adjustment Tool first, oth-
erwise adjustment may be changed.
Note; If Red and Blue lines do not converge with green
lines, loosen screws-A of Green reference panel
and adjust Green panel slightly.
A
X
Z
Y
LCD panel
unit
(Prism/LCD Panel
assembly)
Fig.61
Fig.61a
Fig.61b
Fig.61c
Prism/LCD panel unit