Hitachi C43-FD2000, Service Manual

Page: 62 / 131

2.3 RASTER INCLINATION
ADJUSTMENT (DEFLECTION YOKE)
Adjustment preparation
(1) Face the set East or West.
(2) Receive the NTSC cross-hatch signal.
(3) Contrast should be set MAX. and the other
controls should be set CENTER.
(4) The lens focus should be coarsely adjusted.
(5) The electrical focus should be coarsely
adjusted
(6) The digital convergence should not be
corrected.
(7) Turn the Main power SW. off.
(8) Press and hold the “SERVICE ONLY” SW.
on CONV./FOCUS P.W.B. and switch on the
Main power.
REMARKS DIGITAL CONV. SERVICE
ONLY button: on the CONVER/FOCUS
P.W.B.
Adjustment procedure
(1) Apply covers to the R and B lenses and
project only green light. Or short the TS (2P
SUB MINI Connector) on R and B CPT
P.W.B. and project only green light.
(2) Turn the G deflection yoke and adjust the
Vertical raster inclination.
Vertical center axis of cross-hatch signal
(3) Then, remove the cover of R or B lens and
project red or blue light and green light
together on the screen.
(4) Turn the deflection yoke of R or B and set
so that the inclination of R or B light with
respect to the green light is as shown below
on the end sides.
Apply to Red and Blue.
(5) After the adjustment, fix the screw of each DY
with a torque of 1.18 Nm(12kgfcm).
2.4 BEAM ALIGNMENT
Preparation for adjustment
(1) Pre-heat 30 minutes or more before the
adjustment.
(2) The static convergence data should be
cleared.
(3) Raster inclination should be adjusted.
Optical focus should be coarsely adjusted.
(4) Contrast should be set MAX and the other
control should be set: Center.
(5) Receive the NTSC cross-hatch pattern signal
or Dot pattern signal.
(6) Discharge static charge from metallic parts
on PRT NECK by using Short-clip-JIG.
Adjustment procedure
(1) Green (G) tube alignment: Short-circuit 2P
sub-mini connectors on the red ( R ) and blue
(B) CPT P.W.B.s and project the only green
beam.
(2) Set the G tube beam alignment magnet to
the cancel state as shown below. Refer to
Adjustment point locations, item no.5.
(3) Turn the static focus VR*
1
for Green fully
counterclockwise and check the cross-hatch
center position on the screen.
Note : Halo state
(4) Turn the static focus VR*
1
for Green fully
clockwise.
(5) Turn 2 sheets of the alignment magnet in
either direction and move the cross-hatch
center to the position where is checked in
step (3).
(6) Turn the static focus VR*
1
for Green and
check if the picture position moves or not.
(7) Repeat steps (2) to (6) until the picture
position does not move during step (6)
(8) In the same manner, adjust the Red ( R )*
2
and the Blue (B)*
3
tube alignments.
(9)
Fix the beam alignment magnet with white
paint after the alignment is completed.
*
1
*
2
Static Focus VR is on
*
3
focus pack UFPK
2.5 LENS FOCUS ADJUSTMENT
Adjustment preparation
(1) The orientation of PTV set is arbitrary, west,
east, north and south.
(2) Centering DY inclination should be adjusted.
(3) Electrical focus adjustment should have been
completed.
(4) Receive the NTSC cross-hatch signal.
L
2
L
1
,L
2
<+ 2mm
R or B
G
L
1
L
Apply to
green DY
L<+2mm