Dell E178FPC Service Manual

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Dell E178FPC Service Manual Manual pdf 55 page image

17" LCD Color Monitor Dell E178FPC5510. White balance, Luminance adjustmentApproximately 2 Hours should be allowed for warm up before proceeding White-Balanceadjustment.Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 3 to 6500 0K colors, MEM.Channel 4 to 93000K colors, MEM. Channel 9 to 57000K (our 9300 parameter is x=283±30, y=297±30, Ymin=160 cd/m2 ；6500 parameter is x =313±30, y=329±30, Ymin = 160 cd/m2, and 5700 parameter is x = 326 ±30, y =349 ±30, Ymin = 160 cd/m2)How to setting MEM.channel you can reference to Chroma-7120 user guide or simple use “ SC” key and “ NEXT”key to modify x, y, Y value and use “ID” key to modify the TEXT description Following is the procedure to dowhite-balance adjustEnter into the factory mode:Press MENU and “+” button during press Power button will activate the factory mode,Gain adjustment:Move cursor to “-Factory Setting-” and press MENU key to enter this sub-menu.Move cursor to “Factory” and press MENU key.Move cursor to “ Auto Level” and press MENU key to adjust Gain and Offset automatically;a. Adjust sRGB (65000K) color-temperature1. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)2. Switch the MEM. channel to Channel 3 (with up or down arrow on Chroma-7120)3.The LCD-indicator on Chroma-7120 will show x = 313 ±30, y = 329 ±30, Ymin = 160 cd/m 2b. Adjust Color1 (93000K) color-temperature4. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)5. Switch the MEM.channel to Channel 4 (with up or down arrow on Chroma-7120)6. The LCD-indicator on Chroma-7120 will show x = 283 ±30, y = 297 ±30，Ymin= 160cd/m2c. Adjust Color2 (5700 0K) color-temperature7. Switch the Chroma-7120 to RGB-mode (with press “MODE” button)8. Switch the MEM.channel to Channel 9 (with up or down arrow on Chroma-7120)9. The LCD-indicator on Chroma-7120 will show x = 326 ±30, y = 349 ±30，Ymin =160 cd/m210. Move cursor to “Exit/Save” sub-menu and press MENU key to save adjust value and exit.Turn the POWER-button off to on to quit from factory mode.Max Brightness measurement: >230 cd/㎡Test conditions:a. Switch to the full white pattern, in user mode main menu:1. Set Red, Green, and Blue to the max.2. Set Brightness, Contrast to the max.b. The Minimum brightness is: < 40% of Max luminance (max luminance = max contrast + max brightness)Test conditions:Set Brightness, Contrast to the min.