Nokia 446PRO, Руководство по обслуживанию, Страница: 28 / 59

446F 26
7.3. Geometry
Magnetic fields for following adjustments: vertical 0.45G and horizontal 0.0G.
Activate Service Mode in 91.376 kHz/85 Hz (GTF642).
Degaussing must be carried out before the picture adjustments. Degaussing shall be repeated if the
monitor is moved.
1) Select
91.376 kHz/85 Hz
(GTF642) crosshatch test pattern.
Set to maximum and adjust until the background is faintly visible.
Reduce width until both vertical edges of the background are visible.
2) Straighten the picture if tilted.
This adjustment is common for all display modes.
3) Centre the background.
This adjustment is common for all display modes.
4) Adjust size, position and shape of the picture equal to the mask aper-
ture. Adjust first the properties with largest deviation from the correct
value.
5) Adjust final width and height.
6) The distance between bezel and active screen edge shall not vary
more than 2.0 mm in vertical and horizontal direction.
7) Repeat steps 4) and 5) for every display mode to be stored. Note that
the display mode can be changed without leaving the service mode.
GEOMETRY
GREY SCALE
SHARPNESS
PRODUCT INFORMATION
MEMORY SETTINGS
Raster
Width
Horizontal centering
Height
Vertical centering
Pincushion
Pincushion balance
Trapezoid
Orthogonality
S Correction
C Correction
E/W Corner
Tilt
= =
00: 1280x1024 85HZ
= =
354 --/+ 4 mm
265
--/
+
3
m
m
<1.5mm
<1.5mm
<1.5m
m
<1.5
m
m