Toshiba 34AX9UE, Service Manual

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GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
ELECTRICAL ADJUSTMENTS
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.
FOCUS VR ADJ
SUB-BRIGHTNESS
(BRTC)
Note: Constrict the picture height
until the vertical retrace line
appears adjusting the item
HIT (HEIGHT).
1. Set CONTRAST to 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 pat-
tern slightly light.
4. Adjust
;
– /+ button to increase the data
value of BRTC, and set it just before the
difference between the belt of vertical re-
trace and the border of black portion of
inside pattern is visible.
After that, return vertical height and con-
trast.
ITEM ADJUSTMENT PROCEDURE
Belt of vertical retrace
HORIZONTAL POSITION
ADJUSTMENT (HPOS)
VERTICAL POSITION
ADJUSTMENT (VPOS)
1. Set the TV in service mode, and get
black cross-bar signal with VIDEO
button on remote hand unit.
2. Select either HPOS (Horizontal pic-
ture phase) or VPOS (Vertical picture
phase) with CHANNEL
s
,
t
buttons,
and adjust horizontal or vertical pic-
ture position in the center of screen
with VOLUME
;
– /+ buttons.
VERTICAL AMPLITUDE
ADJUSTMENT (HIT) 1. Set the TV in service mode, and get
black 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.
The first