Acer AL707 Service Manual

Also see for AL707: User manual

Contents

74. ADJUSTMENT4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONSAdjustments should be undertaken only on following function : Contras , Brightness, Black level,Phase, Clock , H/V-position , Languages, Color-(C2,C1,User), Auto level, OSD-position, Languages, Reset4-2 ADJUSTMENT METHODPress MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button toselect the function or done the adjustment.1. White-Balance, Luminance adjustmentApproximately 30 minutes should be allowed for warm up before proceeding white balanceadjustment.Before started adjust white balance ,please setting the Chroma-7120 MEM. Channel 1 to C2 color andMEM. channel 2 to C1 color, ( our C2 parameter is x = 302 ±20, y = 319 ±20, Y = 200 ±20cd/m2and C1 parameter is x = 313 ±20, y = 329 ±20, Y = 200 ±20 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,yY value and use “ID” key to modify the TEXT descriptionFollowing is the procedure to do white-balance adjustPress MENU button during 1 seconds along with plug in the DC-power cord will activate the factory mode,and the OSD screen will located at left top of panel.I. Bias (Low luminance) adjustment :1. Press “ AUTO” button , and wait for message “ Pass”2. Set the contrast on OSD window to the value=45 , color (user )R,G,B set to “50”3. adjust the brightness on OSD until chroma 7120 measurement reach the value Y=240 cd/m2 ±10cd/m2