PRT SURFACE SIDE

1e 4-POLE BEAM SHAPE CORRECTION

MAGNET

2-POLE BEAM ALIGNMENT MAGNET

TRUE CIRCLE SPECIFICATION

TRUE CIRCLE DEGREE: a/b

SPECIFICATION: 0.9-l .l

2.12 Static focus adjustment

Adjustment preparation

(1)The raster inclination, centering, horizontal/ vertical amplitude and optical/electrical focus beam alignment should have been adjusted.

(2) The static convergence data should be cleared. Set video conditions to factory reset.

I:; 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

(1)Red (R), Green (G) and Blue (B) static focus adjustment. Vary the static focus VR (focus pack UFPK) and make the center of the cross-hatch pattern clearest.

(2)Observe the corners of the picture and check that the focus does not get conspicuously worse.

OBSERVING POINTS OF THE

CORNER OF THE PICTURE

OBSERVING POINTS

2.13 Blue defocus adjustment

Adjustment Preparation

(1)Optical and electrical focus adjustment should have been completed.

(2)The convergence adjustment should have been completed.

(3)Set Video conditions to factory reset.

Adjustment procedure

(1)Input an ail-white signal shown below to VIDEO input.

(2)Short-circuit 2P sub-mini connectors on the red and green CPT P.W.Bs. to display only the blue beam.

(3)Turn the B Focus VR (Focus Pack) fully clockwise.

(4)Measure the brightness at the center of the screen and turn the B FOCUS VR (Focus Pack) counterclockwise to adjust the brightness of blue.

(5)After the adjustment is completed, if blue exceeds the specification, turn and adjust focus so that the sticking out part of blue satisfies the specification.

1ALL-WHITE SIGNAL WAVEFORM

TERMINATION CONDITION: OPEN

STICKING OUT OF BLUE

UNEVENNESS SPECIFICATION: +1cd/m2

Defocus sticking out specification

60”

1 .Omm

Condition: User controls are set to the initial set positions (for shipment) Measuring point Screen center.

Cautions: Correct the brightness gauge and amplitude of the all-white signal periodically. The aperture angle of the brightness gauge is lo.

Use a cross-hatch pattern to check.

2.14

Digital convergence

adjustment

Note:

If replacing a PRT,

DY, etc. perform auto-digital

 

convergence first. (Press front panel MAGIC

 

FOCUS switch when in normal customer mode).

 

This can eliminate the need for a complete

 

digital convergence

alignment.

Adjustment preparation

Receive an RF or video signal. ;:; Set controls to factory preset.

(3)Install jig screen on the set.

(4)Note the center of the video pattern displayed. This is necessary to match dotted lines (adjustment point viewed) and actual point that is adjusted and displayed by the video signal.

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Hitachi 60SBX78B Observing Points, Convergence first. Press front panel Magic, This can eliminate the need for a complete

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