Acer B223PWL Acer B223PWL and V223PWL Monitor Service Guide - Page 7

5 1.2 General Requirements: 1.2.1 Test Condition: All tests must be performed under "standard testing conditions" unless otherwise specified. Warm up time AC supply voltage Ambient temperature Humidity Display mode e-color mode Contrast control Color temperature Brightness control Analog Input signal Picture position and size Viewing angle Viewing distance Ambient illumination > 30 min. 230V± 5%, 50± 3 Hz 20C  15C 65%  20% 1680x1050, 60 Hz, Pixel Clock：148.5MHZ,all white Set to "User" mode Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished. 6500°K The value under user mode 700 mVss Factory preset value, 90 ° H and V 40 cm for LCD performance, 20 cm for LCD failures Dark room (< 1 cd/m2) 1.2.2 Test Equipment: CHROMA 6630. 1.3 Electrical: This section describes the electrical requirement of the monitor. Below is the block diagram. LED Drive. Flat Panel and LED backlight Power board AC-IN 100V-240V Main Board Key Board RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC The LCD monitor will contain a main board, a power board and a key board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage. The function key board is used for OSD control, monitor power ON/OFF and the LED indicator for power status.