3
Focus Adjustment
3
-1
-2
Focus Adjustment of Lens Assy
Start
Cross hatch
3
Focus VR Adjustment
Focus VR (VR1)
B
G
R
FOCUS VR
Turn the Focus VR for best focusing.
Cross hatch
Lens assy
(For Red)
Lens assy
(For Blue)
Lens assy
(For Green)
Perform lens focus adjustment after the unit has been warmed up
(some time after turning the unit on with the Power switch).
Set the output to 480P
Adjust the focus of each lens so that :
For Green :
• the vertical and horizontal lines at the center become their thinnest.
• the scanning lines at the center are their strongest.
• the red halo faintly appears at the center.
For Red :
• the vertical and horizontal lines at the center become their thinnest.
• the scanning lines at the center are their strongest.
For Blue :
• the vertical and horizontal lines at the center become their thinnest.
• the green halo disappears, and the blue halo begins to appear.
Note on tightening the thumbscrew after adjustment :
Observe the crosshatch signals on the screen while tightening the thumbscrew,
to check that the lens does not rotate with the thumbscrew.
"Best focusing"
