Nokia 445PRO User Manual

445N
30
7.4. Grey Scale
The grey scale is adjusted for 9300K colour temperature.
Activate Service Mode in 107.10 kHz/85Hz (NCE791).
7.4.1. The Most Dominant Colour
The most dominant colour has been marked in a label on the deflection yoke.
It may not be correct if tube or SMH card has been changed. In that case judge
the most dominant colour from the tone of the picture after you have made the
following adjustments.
1) Select 107.10/85.0 (NCE791) black test pattern.
2) Set
to maximum and to minimum.
3) Set Blacklevel adjustment RED/GREEN/BLUE Black Level to (step 25)
4) Set RED/GREEN/BLUE Amp menu and G2 menu adjustments to center
(step130).
5) Placetheprobeofthecolouranalyzerinthemiddleofthescreenand
adjust with G2 trimmer until the picture illuminance is 3±1.0 cd/m
2
7.4.2. Low Light
1) Select 107.10/85.0 (NCE791) black test pattern.
2) Adjust picture illuminance to 1.0 cd/m
2
with potentiometer.
3) Adjust the
with potentiometer t o the minimum.
4) Adjust the colour coordinates to (9300K)
x = 0.283±0.010
y = 0.297±0.010
with RED/GREEN/BLUE Black Level adjustments.
Do not adjust the most dominant colour.
During the adjustment check if brightness is chancing over tolerance, when
needed adjust it back . If Y--- and X---values are getting too far from ideal val-
ues, you have chosen wrong MOST DOMINANT COLOUR. Check the domi-
nant colour again according to the instructions.
5) Set
to the maximum and check that the illuminance is still 3±1.0 cdm
--
2
.
If not, repeat 7.4.1. steps 5).
6) Adjust picture illuminance to 1.0 cd/m
2
with potentiometer and check the
colour coordinates.
7.4.3. High Light
1) Select 107.10/85.0 (NCE791) black test pattern.
2) Adjust with
the picture illuminance to 1±0.1 cd/m
2
.
3) Select 107.10/85.0 (NCE791) window test pattern.
4) Adjust with
the picture illuminance in the window to 100±5 cd/m
2
5) Adjust with RED/BLUE Amp the colour coordinates in the window to
x = 0.283±0.003
y = 0.297±0.003
Check after adjustment that the illuminance reading is in limits.
7.5. Maximum/Minimum Contrast
1) Set to the maximum.
2) Adjust with
the picture illuminance outside window to 1.0 cd/m
2
.
3) Adjust illuminance in the window to 140±5 cd/m2 w ith
MAX CONTRAST.
4) Set
to the minimum.
5) Adjust the minimum illuminance in the window to 5 ± 1 cd/m
2
with
MIN CONTRAST.
6) Exit from service mode.
7.6. Focus
1) Select 107.10/85.0 (NCE791) crossh atch test pattern
2) Set
to the maximum and adjust to 70 % (background faintly visible).
3) Adjust the sharpness with FOCUS H and FOCUS V to optimum
4) Adjust
until the background is invisible
5) Select focus test pattern. Check that all letters a r e clearly visible.
FOCUS H
Left side view
of the chassis
FOCUS V
G2
pixelpi xe lpi
pixelpi xe lpi
pixelpi xe lpi
pixelpi xe lpi

Nokia 445PRO Specifications

General

Brand	Nokia
Model	445PRO
Category	Monitor
Language	English