76232103 datasheet(9/70 Pages) TOSHIBA

9 / 70 page

– 9 –

ELECTRICAL ADJUSTMENTS

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)

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

2. Press the a button on the Remote until the black cross-bar pattern appears on the

screen.

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

screen.

1. Set

CONTRAST

minimum,

and

BRIGHTNESS to center by adjusting user

controls.

2. Set the TV in service mode to get Black

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 cross-bar signal with a button

on remote hand unit.

2. Select either HPOS (Horizontal picture

phase) or VPOS (Ver tical picture

phase) with CH s, t buttons, and

adjust horizontal or vertical picture

position in the center of screen with

; –/+ buttons.

1. Set the TV in service mode, and get

black cross-hatch signal with a button

on remote hand unit.

2. Select HIT (Vertical amplitude) with

CH s, t buttons, and adjust vertical

amplitude with ; –/+ buttons so that

vertical amplitude lacks a little.

3. Adjust vertical amplitude with ; –/+

buttons so that the first bar on cross-

hatch signal touches edge of screen.

Belt of vertical retrace

The first

ITEM

ADJUSTMENT PROCEDURE

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