BELINEA 10 55 70, Service Manual

Page: 39 / 80

The adjustment settings in this section are
based on REVISION B of the factory
ment procedures. Appendices detailing
changes in the factory alignment proce-
dures that have occurred since publication
of this service manual are available upon
request.
fnitial settings to be carried out
a//y prior to alignment:
4.3. High Voltage Verification
Input a cross hatch pattern in primary mode. Check that
the
voltage is 1. Adjust 1 (see 1
for location) to correct if necessary.
2 . Input a cross hatch pattern in primary mode and adjust
on the mainboard (see 1 for approximate
location) so the high voltage is in the range
3. Input a full white pattern in 3 (640x480) mode
and press the external button to make horizontal size to
minimum, then adjust
on the Main Board (see
Figure 4-l for approximate location) so the horizontal
size is in the range
Location of
FRONT
Figure Location of on Mainboard
Steps used in white balance adjust-
ment:
4.4. Background Brightness Setting
1. Input a raster pattern in primary mode and turn external
brightness to maximum. Adjust the SCREEN VR so
background brightness is approximately 1
2 . Before carrying out white balance adjustment,
the A.B.L no action and adjust internal con-
trast to center position.
3. Before carrying out white balance adjustment, make
sure that the display size and linearity are in
4 . Input timing in primary mode, and the white balance
automatic adjust some item as blow.
(a) Input no video pattern in primary mode, and set-up
brightness of raster white balance get the
value is
(b) Input a full white pattern in primary mode, and set-up
5000 degrees kelvin of picture white balance get the
value is
(c) Input a full white pattern in primary mode, and set-up
6500 degrees kelvin of picture white balance get the
value is
(d) Input a full white pattern in primary mode, and set-up
9300 degrees kelvin of
white balance get the
value is
4.5. Screen Brightness Adjustment
1. Input a primary mode timing with no video input. Ad-
justment and make ABL no action and adjust
external brightness to
2. Input a full white pattern, set external contrast to maxi-
mum and adjust VR302 and check that brightness at the
center of the screen is in the range
a full
white pattern, set external brightness to maximum and
adjust VR301 and check that brightness at the center of
the screen is in the range
1.
4.6. Magnetic Field Configuration
Configure the magnetic field as follows:
Northern :
??
hemisphere : V=-0.52
4.7. Tilt Verification
Input a cross hatch pattern in primary and use the tilt
rotation key to ensure that tilt is less than Imm.
4.8. Focus Verification
1. Input a full white pattern in primary mode. Use the
external brightness control to adjust background
4-2