Acer AL1716 AL1716W Service Guide - Page 7

6 ACER AL1716W Go to cover page 1. Product Specification (continued) 1.7 Controller Requirements: 1.7.1 General Requirements: The monitor shall include a controller capable of converting the analog RGB signal from a standard WXGA resolution video controller in the CPU to a signal which can be displayed on the panel. The controller will include a PLL, A/D converters, and other circuitry necessary to perform its function. The PLL shall be stable enough to ensure that a static image from the CPU is placed in the same physical location on the flat panel in each frame. 1.7.2 Video Stretching: The monitor shall contain provisions to "stretch" the video signal, so that an input signal from the computer in any resolution smaller than 1440 x 900 is automatically expanded to fill the entire screen. 1.7.3 Panel Timing and Interface: The controller supplied with the monitor shall control all panel timing. This controller shall adequately insulate the monitor from the computer, so that no possible combination of input signals from the computer shall cause damage to the flat panel or any other component of the monitor. The LCD panel interface shall support the TFT standard. 1.8 DC - AC Inverter Requirements: The frequencies used by the DC-AC inverter used to power the backlight shall be chosen so as to prevent any noticeable effects on the flat panel (such as a rolling effect). 1.9 Power Supply Requirements: The AC to DC converter power supply for the monitor shall be an integrated power supply. This power supply shall have an IEC receptacle for mains power input and provide sufficient power for the monitor, the backlight assembly and the "Dell Sound bar", and shall meet all requirements specified in Table 2. Table 2. AC TO DC Converter Requirements Input Voltage Range The operating range shall be from 90 to 240 VAC sinusoidal for all models specified. Input Frequency Range Input power frequency range shall be from 47.5 to 63Hz over the specified input voltage range. Power Consumption Power consumption for the monitor shall be less than 75W over the specified voltage and frequency ranges. In power off mode the power consumption will be less than 1W (at 90VAC~240VAC). Line Fuse Initial Cold Start The AC input shall be fused and become electrically open as a result on an unsafe current level. The fuse may not be user replaceable. The power supply shall start and function properly when under full load, with worst case conditions of input voltage, input frequency, operating temperature, and cold backlight lamps. Inrush Current The inrush current must be limited to 42A when operated at 120VAC, and 80A when operated at 220VAC. In - rush current is measured at an ambient temperature of 25° C, with the unit temperature stabilized in the power - off Hot Start Cycle The power supply shall not be damaged when switched ON for one second and OFF for one second for seven consecutive times after operating for one hour at full load, 25°C, and nominal input line voltage. Under Voltage The power supply shall contain protection circuitry such that the application of an input voltage below the minimum specified in this table shall not cause damage to the power supply unit nor cause failure of the input Line Transient The power supply shall operate within IEC 801-4 (±1KV) and IEC 801 -5 (±2KV) for the domestic U.S. Version. The UPS power supply shall operate and comply with CE mark. 1.10 Display Communications Channel: The monitor assembly shall provide a display communications channel that conforms to VESA DDC2B hardware requirements. This configuration shall contain the 256-byte EDID file as specified by VESA E-EDID Standard. The monitor contains a separate EEProm for each video input to store EDID information. Once the EDID is programmed there is a write protection that is enabled so that the EEPROM cannot be overwritten.