6OSXl OBNl 1 KA
50UX22BA/23KA
46UX20BN21 KA
50SX7PA
Adjustment procedure
(1) Green PRT beam shape adjustment. Short-circuit 2P submini
connectors on Red and Blue CPT P.W.B.s to project only the
Green beam.
(2) Turn the green static focus fully clockwise. (Blooming.)
(3) Make the dot at the screen center a true circle using the 4-pole
magnet as shown below.
(4) Also adjust the Red and Blue PRT beam shapes according
to the steps (1) to (3).
(5) After the adjustment is completed, return R, G and B static
VRs to the Just focus point.
PRT SURFACE SIDE
Note: (1) If internal cross-hatch does not appear after clearing
RAM data, press front panel service switch
(see page 11) again. 4POLE BEAM SHAPE
(2) To restore old RAM data, turn TV off and on. CORRECTION MAGNET
ZERO FIELD SPACER
(NO ADJUSTMENT)
3.3.4 Focus adjustment f--- 2-POLE BEAM
3.3.4.1. Beam alignment ALIGNMENT MAGNET
Adjustment preparation
Adjust at least 30 minutes after turning on power switch.
I:; The static convergence data should be cleared
(see section 2.1 Memory initialization).
(3) Raster inclination, centering, horizontal and vertical amplitudes
and optical focus adjustment should be completed. TRUE CIRCLE SPECIFICATION
(4) Contrast: Max.
Other items: Typ.
(5) Receive cross-hatch signals. (Use of internal cross-hatch
signals allowed.)
(6) Short-circuit all metal parts (metal fittings, centering magnet) TRUE CIRCLE DEGREE: a/b
installed on the projection tubes to GNDs of the projection
SPECIFICATION: 0.9-1.1
tubes.
Since metal Darts are charaed with electricitv, shocks may be
caused if thev are not short-circuited.
Adjustment procedure
(1) Green (G) tube beam alignment adjustment. Short-circuit 2P 3.3.4.3. Static focus adjustment
subminiature connector plug pins of Red (R) and Blue (B) Adjustment preparation
on the CPT boards and project only Green (G) tube. (1) The raster inclination, centering, horizontal/vertical amplitude
(2) Put Green (G) tube beam alignment magnet to the cancel and optical/electrical focus beam alignment should have
state as shown below. been adjusted.
(2) The static convergence data should be cleared.
(3) Contrast: More than MAX-5 STEP
Brightness: Center (Reset point)
(4) Receive the cross-hatch pattern signal.
(5) Apply covers to the lenses of colors other than the color to be
adjusted and project a single color.
Adjustment procedure
(3) Turn the Green (G) static focus (Focus Pack) counterclockwise (1) Red (R), Green (G) and Blue (B) static focus adjustment.
all the way and make sure of position of cross-hatch center on Vary the static focus VR (focus pack EFPK) and make
screen. (Halo state.) the center of the cross-hatch pattern clearest.
(4) Turn Green (G) static focus (Focus Pack) clockwise all the way. (2) Observe the corners of the picture and check that the focus
(Blooming state.) does not get conspicuously worse.
(5) Turn two magnets forming alignment magnet in any desired
direction and move cross-hatch center to position found in (3).
OBSERVING POINTS OF THE CORNER
(6) If image position does not shift when Green (G) static focus OF THE PICTURE
(Focus Pack) is turned, Green (G) beam alignment has been
completed.
(7) If image position shifts when Green (G) statis focus (Focus
Pack) is turned, repeat (2)-(6).
(6) Conduct beam alignment for Red (R) focus: Focus Pack EFPK
Blue (B) focus: Focus Pack EFPK
(9) Upon completion of adjustment, fix beam alignment magnets
with white paint.
OBSERVING POINTS
3.3.4.2. Beam shape adjustment
Adjustment preparation
(1) The beam alignment should have been completed. 3.3.5. Blue defocus adjustment
(2) The raster inclination, centering, horizontal/ve.rtical amplitude Adjustment preparation
and optical focus adjustments should have been completed. (1) Optical and electrical focus adjustment should have been
.3) Contrast: Max completed.
Other time: Typ. (2) The convergence adjustment should have been completed.
(4) Input the dot signal. Coarse-adjustment is acceptable for convergence.
(3) Brightness: Max.
Other items: Typ.
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ACEC
