Acer AL2002 AL2002 Service Guide - Page 10

9 Go to cover page B. OSD Controls Item Description Brightness Backlight Luminance of the LCD panel is adjusted. Contrast A gain of R,G and B signal is adjusted. Color Temperature 9300K, 8200K, 7500, 6500K, 5000K And User settings. Auto Adjust Clock system auto adjustment, about under 5 sec. Left/Right The indication screen is horizontally moved right and left (1 pixel pitch) Up/Down The indication screen is vertically moved up and down (1 pixel pitch) Pixel Clock The ratio of dividing frequency of the dot clock is adjusted. Phase The phase of dot clock is adjusted. OSD Language Select the language used for the OSD menu from between English, French, Italian, Deutsch, Spanish, Japan, Simple Chinese and Traditional Chinese. Recall Defaults All data copy from factory shipment data. OSD Position The OSD indication position can be selected. 3.7. Monitor Modes and Timing Capability: 3.7.1. Format and Timing The monitor shall synchronize with any vertical frequency from 56 to 76 Hz, and with any horizontal frequency from 30 to 81 KHz. If the input frequency is beyond the 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. 3.7.2. Factory Assigned Display Modes There are 11 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 powered-on, previously stored screen parameters for a pre-defined 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. 3.7.3. Mode Recognition Pull-in The monitor shall recognize preset modes within a range of +,- 1KHz whichever is less for horizontal ; and within +,- 1Hz for vertical. 3.7.4. User Display Modes In addition to the factory pre-set video modes, provisions shall be made to store up to 15 user modes. If the current mode is a user mode, the monitor shall select its previously stored settings. If the user alters a setting, the new setting will be stored in the same user mode. The user modes are not affected by the pre-set command. If the input signal requires a new user mode, storage of the new format is automatically performed during user adjustment of the display (if required).