Dell 1907FPf Service Manual page 34

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Test OSD
1.Signal is set as 1280×1024@60Hz under General-1
2. LCM button are from left to right, checking whether each
function
single function key and compound function key can be worked.
Contrast Check
1. Set input mode to 1280×1024@60Hz
2. Set to 32gray scale pattern
3. Set contrast to the maximum. At most 6 bars cannot be
distinguished.
4. At default setting (B=75%, C=50%), No bar over saturation.
Color
1. Do "Auto color Balance" at 1280×1024@60Hz, White
Temperature
and black pattern
2. Measure color temperature, check if it complies with the
following temperature :
Normal Preset(sRGB)
Blue Preset
Red Preset
u
u
CCT
1.
(Correlated
Colour
2.
Temperature)
3.
Variation
4.
CCT in K
9300 (Blue)
6500 (Normal)
5700 (Red)
5.
6.
v If the TCO'03 set is not complied with 6500K,
Adjust it if not complied with either 9300K or 5700K.
1. Use Chroma Pattern Generator to make sequence.
Modes switching
VESA (640x480 800x600 1024x768 1152x864 1280x1024),
check
the detail supported modes (see table 1) and power saving
signal.
2. Confirm the above timing modes must be full screen and
the picture must be normal.
3. LED is amber at power saving mode.
VGA
cable
When VGA cable is not plugged out, self- test OSD will be
detector
floated.
Y measurement
1. Set brightness and contrast to default value 75 at 6500K
2. With full white pattern, Y shall be 230 ± 20 cd/m
at default setting
3. Brightness 100%, contrast 100%, Full white pattern, User Mode, R,G,B
to 100%, Y should be over 250nits.
OSD Lock Test
Soft Lock: When OSD is locked, this icon should appear for only 2 seconds
with all buttons pressed, except for the "Menu" and "Power" ones.
Hard Lock: Press "Menu" button for 15 seconds enables the "locked" icon
to be displayed, which will lock A ll buttons expect for the "Power". Press
"Menu" button for another 15 seconds enables the "unlock" icon to be
shown.
=
x
. 0
=
x
=
x
x, y 範圍設限於
±
0.02
R, G, B Min.設限分別為 240, 245, 220
Do "Auto color Balance" at 1280×1024@60Hz, White and black
pattern
Background Colour: RGB 204, 204, 204
The measurement position "Pc" shall be a 40mm x 40mm square
positioned in the centre of the screen (RGB settings: 255, 255, 255)
=
2
u
' '
v
' (
u
u
'
)
CCT
m
u'
CCT
0.1888
0.1978
0.2028
u'
v'
and
: measured values of the screen for the preset CCT
m
m
u'
v'
and
: CIE reference chromaticity co-ordinates
CCT
CCT
∆ v
' ' ≤
u
. 0
01
240); otherwise, return as TCO'99 set.
Content
±
=
313
. 0
03
,
y
. 0
329
±
=
. 0
283
. 0
03
,
y
. 0
297
±
=
. 0
328
. 0
03
,
y
. 0
344
+
2
' (
v
v
'
)
CCT
m
v'
CCT
0.4457
0.4684
0.4781
adjust B color (Min.為
33
Service Manual
Equipment
Chroma
Signal Generator
Chroma
Signal Generator
Chroma Signal
Generator and color
analyzer
±
. 0
03
±
. 0
03
±
. 0
03
Chroma
Signal Generator
Visual check
Chroma Signal
2
Generator and Color
Analyzer
Visual Inspection

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