Acer X223 X223W LCD Service Guide - Page 5

4 ACER X223W Go to cover page 1. Product Specification (continued) 1.3.2.6 Abnormal Signal Immunity The monitor shall not be damaged by improper sync timing , pulse duration , or absence of sync , or abnormal input signal amplitude ( video and/ or sync too large or too small) , or any other anomalous behavior of a graphics card video generator when changing modes , or when any combination of input signals is removed or replaced . Additionally , under these conditions , the monitor shall not cause damage to the driving source 1.3.3 User Controls and Indicatiors 1.3.3.1Power On / Off Switch The monitor shall have a power control switch visible and accessible on the front of the monitor . The switch shall be marked with icons per IEC 417 , # 5007 and # 5009.The switch shall interrupt the DC supply to the monitor 1.3.3.2 Power Indicator LED The monitor shall make use of an LED type indicator located on the front of the monitor . The LED color shall indicate the power states as given in Table 1. Table 1 Function LED Color Full Power Blue color Sleep Orange color 1.3.3.3 On-Screen Display The Lite-ON On Screen Display system shall be used , controlled by a Menu button. If the buttons remain untouched for OSD turn off time while displaying a menu , the firmware shall save the current adjustments and exit. Also, if the video controller changes video mode while the OSD is active, the current settings shall be saved immediately, the OSD turn off, and new video mode is displayed. Key MENU > < Auto Description When no OSD display OSD Displayed Menu Display 1. To display the OSD menu on the screen. 2. To select the OSD sub-Menu Speaker Volume/Minus 1. Forward selection of the OSD menu. (with Audio) 2. Increase the value after sub-menu selected. Speaker Volume/Plus 1. Back-forward selection of the OSD menu. (with Audio) 2. Decrease the value after sub-menu selected. Auto Adjust Function Menu or sub.menu EXIT/Auto Adjust function. E Empowering Menu or sub.menu EXIT/Scenario mode 1.3.3.4 OSD adjustment ITEM CONTENT AUDIO VOLUME To increase or decrease the sound level BRIGHTNESS Back light Luminance of the LCD panel is adjusted. CONTRAST A gain of R , G and B signal is adjusted. AUTO CONTRAST A gain of R , G and B signal auto adjust. CLOCK The ratio of dividing frequency of the dot clock is adjusted. PHASE The phase of the dot clock is adjusted. H-POSITION The indication screen is horizontally moved right and left (1 Pixels pitch). V-POSITION The indication screen is vertically moved up and down (1 Pixels pitch). AUTO ADJUST Clock system auto adjustment, about under 8 sec. COLOR BALANCE Select three kinds of modes. ( USER /6500 / 9300 ). OSD POSITION OSD LANGUAGE The OSD indication position can be adjusted. Select the language used for the OSD menu among English , French , Italian , Deutsch and Spanish. RECALL DEFAULTS All data copy from factory shipment data. OSD DURATION POWER-SAVE INFORMATION Adjust OSD menu off time range from10~120 second. Back light of the LCD panel is cut when the signal is not input (AC line power consumption 2W or less). The frequency of the horizontal / vertical synchronizing signal under the input is indicated. ※ NOTE : OSD MENU SEE APPENDIX A 1.3.4 Monitor Modes and Timing Capability 1.3.4.1 Format and Timing The monitor shall synchronize with any vertical frequency from 55 to 76 Hz , and with any horizontal frequency from 30 to 81KHz. If the input frequency is out of the above - specified range, the monitor shall display a warning screen indicating that the input frequency is out of range. Under no circumstances shall any combination of input signals cause any damage to the monitor . 1.3.4.2 Factory Assigned Display Modes There are 19 factory pre-set frequency video modes. These modes have a factory pre-set for all characteristics affecting front-of-screen performance. When the system is poweredon,previously stored screen parameters for a predefined mode will be recalled if the operating mode is one of those stored in memory. If the operating mode is not one of those stored in memory, the monitor CPU will select the PRESET timing for a mode that is the next lowest in horizontal scanning frequency to the mode being currently used. The screen parameters may be adjusted by the use of the front bezel controls and then may be saved as a user defined mode. The monitor shall include all the preset video timings shown in the following page.(Please see Note.(3) )