Dell 1909Wf Service Manual

Contents

Dell 1909Wf Service Manual Manual pdf 34 page image

Service Manual33Item Content EquipmentTest OSDfunction1.Signal is set as 1440×900@60Hz under General-12. LCM button are from left to right, checking whether eachsingle function key and compound function key can be worked.ChromaSignal GeneratorContrast Check 1. Set input mode to 1440×900@60Hz2. Set to 32gray scale pattern3. Set contrast to the maximum. At most 6 bars cannot bedistinguished.ChromaSignal GeneratorColorTemperature1. Do “Auto color Balance” at 1440×900@60Hz, 32grayscale pattern2. Measure color temperature, check if it complies with thefollowing temperature :Warm x=0.328 +/- 0.03, y=0.344+/-0.03Desktop x= 0.313 +/- 0.03, y=0.329+/-0.03Cool x= 0.283 +/- 0.03, y=0.298+/-0.03Chroma SignalGenerator and coloranalyzerModes switchingcheck1. Use Chroma Pattern Generator to make sequence.VESA (640x480 800x600 1024x768 1152x864 1280x10241440×900@60Hz), the detail supported modes (see table 1)and power saving signal.2. Confirm the above timing modes must be full screen andthe picture must be normal.3. LED is amber at power saving mode.ChromaSignal GeneratorVGA cabledetectorWhen select VGA model and VGA cable is not plugged out,self-test OSD will be floated.Visual checkY measurementat default setting1. Set brightness and contrast to default value 75 at 6500K2. With full white pattern, Y shall be 220 ± 20 cd/m2Chroma SignalGenerator and ColorAnalyzerOSD Lock Test Soft Lock: When OSD is locked, this icon should appear for only2 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 buttonsexpect for the “Power”. Press “Menu” button for another 15seconds enables the “unlock” icon to be shown.Visual InspectionPanel Flickercheck1. Mode:1440×900@60Hz2. Set Brightness& Contrast to default value (75%)3. Do “Auto Adjustment”4. check whether there’s flicker on the center of the picture.Equipment::Chroma SignalGenerator & PCPower saving 1. Mode:1440×900@60Hz2. Pattern: full White3. Brightness: Max.4. Contrast: Default5. Check power consumption at each modesState Power Consumption LED colorNormal＜55W(with fullload) Blue＜25WStand By ＜1W Amber＜ＷChroma signalgenerator andPower meterAC input:230V/50Hz