2. FINAL ASSEMBLY ADJUSTMENT Set Size Pitch between L
I
2.1 Focus adjustment
50? 3.0 cross-hatch pitches
Adjustment preparation
60? 3.0 cross-hatch pitches
(1) The set can face in any direction: west, east,
north or south.
(2) Receive the cross-hatch pattern signal.
(6) In case of R lens, set to the position where the
CONTRAST : HALF
chromatic aberration changes from red to
BRIGHTNESS : MINIMUM
crimson. As shown below, observe the vertical
(3) The electrical focus adjustment should have
bright line at the center and set to the position
been completed.
where the crimson chromatic aberration slightly
(4) The centering DY inclination should have been
appears inside and red outside (reference value:
adjusted.
1-3mm) within the cross-hatch pitches specified
Adjustment procedure
in next table.
(1) Loosen the fixing screw on the lens cylinder so
that the lens cylinder can be turned. (Be careful
not to loosen too much. If it is loosened too
much, rattling when tightening becomes greater
and the focus may drift). After completing steps
(5), (6) and (7) below, tighten the fixing screws
for each lens with a torque of 12-l 7 Kgf cm.
(2) Apply covers to 2 of R, G and B lenses, and
project a single color on the screen and adjust in
sequence.
RED
(The adjustment order of R, G and B is only an
CHROMATIC
example.) ABERRATION
(3) For each of the R, G and B lenses, observe the
color abberation generated on the outer
SLIGHTLY CRIMSON
circumference of the cross-hatch bright line at CHROMATIC ABERRATION
the center section +3 pitches vertically and
horizontally from the center.
(4) If the lens adjustment knob is turned clockwise, I Set Size I Pitch between L I
viewed from the front, the color aberration
50? 3.0 cross-hatch pitches
changes as follows.
I 60? 3.0 cross-hatch pitches
(7) In case of B lens, set to the position where the
1 G lens 1 Blue 4 Red I
chromatic aberration changes from purple to
1 B lens 1 Purple 4 Green green. As shown below, observe the vertical
I
bright line at the center and set to the position
(5) In case of G lens, set to the point where the where green chromatic aberration slightly
chromatic aberration switches from blue to red. If appears inside and purple outside (reference
the chromatic aberration appearing all over the value: 1-3mm) within the cross-hatch pitches
screen is not the same, observe the vertical specified in next table.
bright line at the center of the screen and set to
the position where red chromatic aberration
slightly appears inside and blue outside
(reference value: l -3mm) within the cross-hatch
pitches specified in next table. When the red
chromatic aberration appearing at both sides of
the bright line is not equal, observe the side with
larger chromatic aberration when adjusting.
PURPLE CHROMATIC SLIGHTLY GREEN
ABERRATION CHROMATIC ABERRATION
Set Size Pitch between L
RED I
CHROMATIC
50? 3.0 cross-hatch pitches
ABERRATlON I I I
I 60? 1 3.0 cross-hatch pitches I
SUGHTLY BLUE CHhOMATlC ABERRATION
OR NO COLOR
19 |
ACEC
