Dell UltraSharp 2208WFP, Руководство по обслуживанию

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Service Manual
34
Item Content Equipment
Test OSD
function
1.Signal is set as 1680 × 1050@60Hz under General-1
2. LCM button are from left to right, checking whether each
single function key and compound function key can be worked.
Chroma
Signal Generator
Contrast Check 1. Set input mode to 1680 × 1050@60Hz
2. Set to 32gray scale pattern
3. Set contrast to the maximum. At most 6 bars cannot be
distinguished.
Chroma
Signal Generator
Color
Temperature 1. Do “Auto color Balance” at 1680 × 1050@60Hz, 32gray
scale pattern
2. Measure color temperature, check if it complies with the
following temperature :
Warm x=0.328 +/- 0.03, y=0.344+/-0.03
Desktop x= 0.313 +/- 0.03, y=0.329+/-0.03
Cool x= 0.283 +/- 0.03, y=0.298+/-0.03
Chroma Signal
Generator and color
analyzer
Modes switching
check 1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1152x864 1280x1024
1680
× 1050@60Hz ), 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.
Chroma
Signal Generator
VGA cable
detector
When select VGA model and VGA cable is not plugged out,
self-test OSD will be floated. Visual check
Y measurement
at default setting 1. Set brightness and contrast to default value 75 at 6500K
2. With full white pattern, Y shall be 220 20 cd/m
2
Chroma Signal
Generator and Color
Analyzer
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 All buttons
expect for the “
Power ”. Press “ Menu ” button for another 15
seconds enables the “unlock” icon to be shown.
Visual Inspection
Panel Flicker
check 1. Mode:1680 × 1050@60Hz
2. Set Brightness& Contrast to default value (75%)
3. Do “Auto Adjustment”
4. Shut down PC to check whether there’s flicker on the
center of the picture.
Equipment::
Chroma Signal
Generator & PC
Power saving 1. Mode:1680 × 1050@60Hz
2. Pattern: full Black
3. Brightness: Max.
4. Contrast: Default
5. Check power consumption at each modes
State Power Consumption LED color
Normal(with full
load)
＜
75
Ｗ
Green
Stand By
＜
2
Ｗ
amber
Power Key Off
＜
1
Ｗ
no
Chroma signal
generator and
Power meter
AC input:230V/50Hz