(3) Choose SIDE PIN item by using Remote A,,v TRUE CIRCLE SPECIFICATION
cursor buttons.
(4) Adjust SIDE PIN as following by using Remote
d,, cursor buttons.
b
fTiizq
(1) Input HD (10801 fH=33.75kHz) component
signal to VIDEO 2 component input (use Signal CL-
TRUE CIRCLE DEGREE: a/b
Generator or Set-Top-Box).
SPECIFICATION: 0.9-l .l
(2) Press and hold the SERVICE ONLY SW on
DEFLECTION PWB and press the MUTE key 2.t 1 Lens focus adjustment
on Remote.
Adjustment preparation
Green DCU cross-hatch and 1% Adjustment
(1) The set can face in any direction: west, east,
MENU should appear and digital convergence
north or south.
RAM should be cleared (uncorrected state).
(2) Receive the cross-hatch pattern signal.
(3) Choose SIDE PIN item by using Remote A,v
CONTRAST : HALF
cursor buttons.
BRIGHTNESS : MINIMUM
(4 Adjust SIDE PIN as following by using Remote
(3) The electrical focus adjustment should have
4,) cursor buttons.
been coarse adjusted.
(51 After adjustment, press SERVICE ONLY SW to
(4) The raster position and raster tilt should have
exit from 1% adjustment mode.
been adjusted.
Adjustment procedure
(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 12-17 Kghm.
Edge of vertical DCU crosshatch line should be straight. Apply covers to 2 of R, G and B lenses, and
(2)
project a single color on the screen and adjust in
sequence.
2.10 Beam form adjustment
(The adjustment order of R, G and B is only an
Adjustment preparation example.)
The beam alignment should have been
(3) For each of the R, G and B lenses, observe the
completed.
color abberation generated on the outer
The raster tilt, centering, horizontal/
circumference of the cross-hatch bright line at
vertical size, trapezoid and side pin adjustment
the center section k3 pitches vertically and
should have been completed.
horizontally from the center as well as in each
Set video conditions to factory reset.
corner of the screen.
Input the dot signal.
(4 If the lens adjustment knob is turned clockwise,
Adjustment procedure viewed from the front, the color aberration
(1) Green PRT beam shape adjustment. Short- changes as follows.
circuit 2P sub-mini connectors on Red and Blue
CPT l?W.B.s to project only the Green beam.
Change of color aberration
(2) Turn the green static focus VR, on the Focus
Pack, fully clockwise. (Blooming.) Short focus Long focus
(3) Make the dot at the screen center a true circle
R lens Orange Scarlet
using the 4-pole magnet as shown below.
(4) Also adjust the Red and Blue PRT beam shapes G lens Blue Red
according to the steps (1) to (3).
B lens Purple Green
(5) After the adjustment has been completed,
return R, G and B static VRs to the just focus
(5) In case of G lens, set to the point where the
point.
chromatic aberration switches from blue to red. If
PRT SURFACE SIDE the chromatic aberration appearing all over the
screen is not the same, observe the vertical
c
bright line at the center of the screen and set to
a. I the position where red chromatic aberration
*. 1 4-POLE 3EAM
1
SHAPE CORRECTION slightly appears inside and blue outside.
MAGNET
(6) In case of R lens, set to the position where the
chromatic aberration changes from orange to
\ Z-POLE BEAM
-ALIGNMENT scarlet. If the chromatic aberration appearing aH
MAGNET over the screen is not the same, observe the
vertical bright line at the center and set to the
15 |
ACEC
HITACHI
