Toshiba 21J1T Manuale di servizio - Pagina 10

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ITEM

FOCUS VR ADJ

SUB-BRIGHTNESS

(BRTC)

Note: Constrict the picture height

until the vertical retrace line

appears adjusting the item

HIT (HEIGHT).

HORIZONTAL POSITION

ADJUSTMENT (HPOS)

VERTICAL POSITION

ADJUSTMENT (VPOS)

VERTICAL AMPLITUDE

ADJUSTMENT (HIT)

ELECTRICAL ADJUSTMENTS

ADJUSTMENT PROCEDURE

1. Enter the service mode, then select any register item.

2. Press the TV/VIDEO button on the Remote until the black cross-bar pattern ap-

pears on the screen.

3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture

screen.

1. Set CONTRAST to minimum, and

BRIGHTNESS to center by adjusting

user controls.

2. Set the TV in service mode to get white

cross-bar of inside pattern.

3. Select BRTC (brightness correction),

and adjust the ; – /+ button to reduce

the value so that white portion of inside

pattern slightly light.

4. Adjust ; – /+ button to increase the

data value of BRTC, and set it just

before the difference between the belt of

vertical retrace and the border of black

portion of inside pattern is visible.

After that, return vertical height and

contrast.

1. Set the TV in service mode, and get

black or white cross-bar signal with

VIDEO button on remote hand unit.

2. Select either HPOS (Horizontal

picture phase) or VPOS (Vertical

picture phase) with CHANNEL s, t

buttons, and adjust horizontal or

vertical picture position in the center

of screen with VOLUME ; – /+

buttons.

1. Set the TV in service mode, and get

black or white cross-hatch signal

with VIDEO button on remote hand

unit.

2. Select HIT (Vertical amplitude) with

CHANNEL s, t buttons, and adjust

vertical amplitude with VOLUME

; – /+ buttons so that vertical am-

plitude lacks a little.

3. Adjust vertical amplitude with VOL-

UME ; – /+ buttons so that the first

bar on cross-hatch signal touches

edge of screen.

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Belt of vertical retrace

The first