Acer X223 X223W LCD Service Guide - Page 3

2 ACER X223W Go to cover page 1. Product Specification 1.1 SCOPE This document defines the design and performance requirements for an 20/22W inch diagonal , flat panel monitor .The display element shall be a WSXGA (1680x1050) resolution TFT-LCD (Thin Film Transistor Liquid Crystal Display).16.7M color(RGB 6bits+FRC) images are displayed on the panel.Video input signals are analog RGB (0.7Vp-p). When the systemis powered-on , previously stored screen parameters for a pre-defined mode will be recalled if the operating mode is one of stored in memory( 19 factory , 9 users timing ).This monitor operates normal by non-interlaced mode. DDC (Display Data Channel) function is DDC2Bi compliance Power saving function complies with the DPMS (Display Power Management Signaling) standard. 1.2 GENERAL REQUIREMENTS 1.2.1 Test Condition Brightness level & contrast level max. Full white pattern test mode following spec. Warm up more than 1 hr, ambient light < 10 Lux , Luminance meter CA110 or BM7 or same equipment . 1.2.2 Test Equipment The reference signal source is a calibrated Chroma 2135 video generator or higher.The use of other signal generators during qualification and production is acceptable provided the product complies with this specification. 1.3 ELECTRICAL This section describes the electricalrequirement of the monitor.The block diagram in Figure1 illustrates the various electrical sub-system. Figure 1 Monitor Block Diagram CCFT Drive LCD Flat Panel Panel data & control, DC power Power Board AC to DC Adapter, DC to DC Converter, DC to AC Inverter. DC 5V DC 5.3V (Audio) Inverter control Speaker line input 1W*2 Sp eaker (Op t ion) Interface Board Flat Panel Controller, DDC Audio AM P. (Op t ion) Function key input Video Signal input & DDC Audio line input AC - IN Audio Source Host Computer Function Key Board The LCD monitor consists of an interface board , a power board , a function key board and two speaker (1W)(with audio) The interface board will house the flat panel control logic , brightness control logic, audio function control (option), key function control, DDC and DC to DC conversion to supply the appropriate power to the whole board and LCD flat panel , and transmitting LVDS signals into LCD flat panel module to drive the LCD display circuit . The power board will support main power DC5V to interface board, and the power DC5.3V to audio function power of interface board,and drive the two CCFLs (Cold Cathode Fluorescent Tube).The interface board provides the power ON / OFF control over the whole monitor and control for DPMS LED indicator to function key board. Signal Input (Analog) MONITOR SPECIFICATIONS ITEM Frequency Analog : H : 30kHz~81kHz V : 56Hz~76Hz SPEC Pixel clock 165MHz (Max) Video Input Analog 0.7Vp-p Signal Input (Digital) Display Pixels Sync Signal Frequency 640 x 480 (VGA) ~ 1680 x 1050 (WSXGA) Separate SYNC for TTL (N or P) Digital : H : 30kHz~81kHz V : 56Hz~76Hz Pixel clock 165MHz (Max) Video Input Analog 0.7Vp-p Input Impedance 75Ω Display Pixels 640 x 480 (VGA) ~ 1680 x 1050 (WSXGA) Connector AC Input AC100V ~ AC240V ± 10% 50/60Hz , 3 pin AC power cord Input connector D-SUB 15 pin & DVI-D Audio Jack (OPTIONAL) Audio input 3.6F Power Consumption AC in 100V~240V Active 48W (with Audio), active 38W, power saving < 2W User's Control Pre-Defined Timing Front OSD Factory Empowering,Auto Adjust,Adjust(-),Adjust (+),Menu,Power Contrast , Brightness , Position ,Clock ,Phase ,Analog/Digital,RESET, Color , Language select , Audio (option), etc. 19 User 9 Plug and Play VESA DDC2Bi Power Saving VESA DPMS Input Signal Counter Tolerance ≦ H ± 1kHz, ≦ V ± 1 Hz 1.3.1 Interface Connectors 1.3.1.1 Power Connector and Cables The AC input shall have an IEC/CEE-22 type male power receptacle for connection to mains power. The power cord shall be with length of 1.8+/-0.005 meters. 1.3.1.2 Video Signal Connectors and Cable The signal cable shall be 1.8 +/-0.005 meters long. At the end of the cable shall be a molded-over, shielded,triple row, 15 position, D-subminiature connector. The CPU connection shall have captive screw locks, which will be adequate for hand tightening. The monitor connection may use small screws.