Acer AL1716 AL1716W Service Guide - Page 6

1. Product Specification (continued) ACER AL1716W 5 Go to cover page 1.5.7 OSD Function (Abnormal Mode) No VGA Signal Menu The function gives a warning when selected input signal is not active. When the Monitor determines that the VGA is not input H/V sync signal as the OFF¡ Bsuspend or standby model, or the V-sync frequency is under 36.5Hz , the Monitor shall display a message, No VGA Signal" for 3 seconds and the LED shall be green, to alert the user that input signal is not active. After the message is displayed about 3 seconds, the monitor shall go into sleep mode and the LED shall be Amber. If the monitor is in Sleep mode, pressing any OSD button shall cause the OSD message to be displayed for another 3 seconds. Out of range Menu Check VGA cable Menu This function gives warning about input resolution or refresh rate that the monitor cannot display. An input signal which is outside the normal range of operation defined in Section 3.2 and the input sync signal frequency for the below condition shall cause the monitor to display for 3 seconds the Out of Range" message, and the LED shall be green: 1. V-sync frequency : 36.5Hz=83KHz This function gives warning about the VGA cable not connection. When the Monitor determines that the VGA is not connected, the Monitor shall display a message, Check VGA Cable" for 3 seconds and the LED shall be green, to alert the user that the video cable is not be plugged into the CPU or a Monitor signal connector. The monitor shall use a method of a pull-up resistor on a ground pin to determine if the video cable is connected to the PC. If the monitor is in Sleep mode, pressing any OSD button shall cause the OSD message to be displayed for another 3 seconds. 1.5.8 OSD Control Factory Default Values: The OSD controls shall have the following factory default values: A. Brightness=100(range 0 - 100) B. Contrast=50(range 0 - 100) C. Volume=90(range 0 - 100) D. Color Temperature=Normal(sRGB) E. Language= English F. Horizontal OSD position=50(range 0 - 100) G. Vertical OSD position=50(range 0 - 100) H. OSD Timeout=30(range 5- 60) I. Horizontal size: no default value J. Fine: no default value K. Left/Right: no default value L. Down/up: no default value 1.6 Monitor Modes and Timing Capability: 1.6.1 Format and Timing The monitor shall synchronize with any vertical frequency from 56 to 76 Hz, and with any horizontal frequency from 31 to 83 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. 1.6.2 Factory Assigned Display Modes: There are 18 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. Preset Timing Chart No Chroma Timing Timing Modes, FV(Hz) 1 102 VGA 720 x 400 70Hz 2 103 VGA 640 x 480 60Hz 3 182 MAC 640 x 480 67Hz 4 173 VGA 640 x 480 72Hz 5 109 VESA 640 x 480 75Hz 6 104 VESA 800 x 600 56Hz 7 116 VESA 800 x 600 60Hz 8 117 VESA 800 x 600 72Hz 9 110 VESA 800 x 600 75Hz 10 108 MAC 832 x 624 75Hz 11 118 VESA 1024 x 768 60Hz 12 157 VESA 1024 x 768 70Hz 13 141 VESA 1024 x 768 75Hz 14 203 MAC 1152 x 870 75Hz 15 339 1280 x 720 60Hz 16 394 1280 x 800 75Hz 17 290 WXGA 1440 x 900 75Hz 18 289 WXGA 1440 x 900 60Hz FH Pixel Rate Sync Polarity (KHz) (MHz) H V 31.47 31.47 35 37.86 37.5 35.16 37.88 48.08 46.88 49.73 48.36 56.48 60.02 68.68 44.772 62.63 70.635 55.935 28.322 25.175 30.24 31.5 31.5 36 40 50 49.5 57.28 65 75 78.75 100 74.5 106.22 136.75 106.5 - + - - - - - - - - - - + + - - + + - - - - - - + + - - - + - - - + - + NOTE: (1) 76Hz=85KHz, or Fv>=80Hz: Power Save (OSD warning invalid mode). 1.6.3 Mode Recognition Pull-in: The monitor shall recognize preset modes within a range of +/- 1 KHz whichever is less for horizontal; and within +/- 1Hz for vertical.