Toshiba 21J1T Servicehandleiding - Pagina 11

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ITEM

WHITE BALANCE

ADJUSTMENT

•

CUTOFF ADJUSTMENT

(RCUT)

(GCUT)

(BCUT)

•

DRIVE ADJUSTMENT

(GDRV)

(BDRV)

NOTE: It is released built-in test pattern by changing the adjustment item for some model.

In this case, select the adjustment item with channel s t buttons first and then select the built-in test pattern with

-/- - button.

ADJUSTMENT PROCEDURE

1. Set Contrast to 40, and brightness to +20 by picture control.

2. Set the TV in service mode, and get the inside W/B adjusting signal with VIDEO

button.

3. Select RCUT, GCUT and BCUT with CHANNEL s, t buttons, to set individual

values to Initial reference data, and to set GDRV and BDRV to Initial reference

data with VOLUME ; – /+ buttons.

4. Press -/- - button on the remote control and rotate Screen VR to get one slight

horizontal line on screen.

Note: Every pressing of -/- - button provides Horizontal line picture and Normal

picture alternately.

5. Press -/- - button to release horizontal line picture, and select the two other colors

which did not light in the above step with CHANNEL s, t buttons. Then tap VOL-

UME ; – /+ buttons so that three colors slightly light in the same level.

To correct white balance in light area,

select GDRV and BDRV with CHANNEL

s, t buttons to adjust.

To correct white balance in dark area,

perform fine adjustment of RCUT, GCUT

and BCUT.

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Light area check

(to show white)

Dark area check

(to show black)