Hitachi 50SX7P Operating Manual page 39

VIDEO
CONVERGENCE CORRECTION ]
Your Projection TV has three color projection tubes: one
for red, one for green, one for blue. When mixed together
in the proper proportion, the output of these three color
tubes can produce any color. To produce these colors,
however, the beams must be precisely aligned over each
other so that the colors can be mixed. The process of
aligning these picture beams is called "convergence'.
Over a period of time, the picture tubes can drift out of
alignment due to normal bumps and vibrations or moving
the TV. If you move your TV, or if, after a time, you notice
color rings or halos around objects in the picture, you may
want to converge (align) the colors.
To simplify convergence, Hitachi incorporates a function
called MAGIC FOCUS, which allows the TV to self adjust
so it can obtain the highest quality picture possible. Press
the MAGIC FOCUS button located on the front panel to
allow the "IV to self adjust. This process will take approxi-
mately 2 minutes. If this button is pressed during this 2
minute period, no change in picture quality will occur. After
this 2 minute self adjust period, picture quality will be
optimum. (Do not move "IV during self adjust.)
To enter this self adjust mode, you may also select
Convergence Correction from the VIDEO Menu. How-
ever, this will display a message prompting you to press
front panel MAGIC FOCUS button.
Properly converged, the lines appear white, which is
actually a combination of the outputs of the three color
tubes. The output of the green tube is stationary. The
outputs of the red and blue tubes can be adjusted. When
properly aligned, the outputs of all three tubes should be
directly over each other to produce the white lines.
AUTO DIGITAL
CONVERGENCE
NOTE:
Only a momentary press of the MAGIC FOCUS button is necessary to start AUTO DIGITAL CONVER-
GENCE. At anytime during thisconvergence correction process, you may press the MAGIC FOCUS button
to exit the convergence correction mode.
Do not press the MAGIC FOCUS button for more than 3 seconds. This is only for extreme cases of
misconvergence and requires assistance from service. If one of the pictures shown below appears on the
television screen, press the MAGIC FOCUS button a second time to exit this manual set up mode.
CENTER MODE STATIC MODE
39