Giáo trình sửa chữa màn hình LCD - Chương4

Giáo trình sửa chữa màn hình LCD

LCD Monitor Service Guide for L2 (Module) Repair Model: MW221U/201U V1.0 RESTRICTIONS ON USE OF MATERIALS This manual is only for ASUS authorized service centers to repair ASUS LCD product. The documents are provided as is and no copy, reproduction or transfer shall be made without first acquiring prior written approval from ASUSTEK. All rights reserved 2Release Version List Version Issue Date Remarks V1.0 2006.09.05 First Release 3Index I. MW201 LCD Monitor Overview 1 II. Product Specification 2 III. MMI .3 Front side 3 Back side 5 IV. Menu & Operating Mode .6 V. Disassembly & Assembly 7 1. Precaution .7 2. Suggest Tools 8 3. Disassembly Procedure .9 3.1 Stand Subsystem 10 3.2 Board Subsystem .11 3.3 Panel Subsystem 16 3.4 Bezel Subsystem 18 4. Assemble Procedure .20 4.1 Bezel Subsystem 21 4.2 Panel Subsystem 23 4.3 Board Subsystem 25 4.4 Stand Subsystem 30 9. HW Block Diagram .31 I. MW221/201 LCD Monitor Overview Main product features include： z 16:10 wide display format z 1680*1050 WSXGA+ High Resolution z Trace-Free Technology provide 2ms(GTG) Response Time z 330nits Brightness with 800:1 Contrast Ratio(MW221U) z 170/160 Degree Wide Viewing Angle z SPLENDIDTM Video Intelligence Technology z HDCP function for digital signals with DVI input z 5 Video Preset Modes (hotkey) & 3 Skin-tones z Dual Signal Input (DVI-D and D-Sub) z DVI cable/D-Sub cable provided z Built-in Stereo Speakers with Earphone Output z Sophisticated Aluminum plate to dress monitor outlook z Shining high-tech feeling key button z Cable cover for great outlook no matter which position z VESA Wall Mounting compatible 2II. Product Specification Technical Specification MW221 MW201 Panel Size 22’’ Wide 20.1’’ Wide Response Time 2ms(Gray to Gray) Brightness (Max.) 300cd/m2 Contrast Ratio (Max.) 700:1 Viewing Angle (H/V) 170/160 170/150 Max. Resolution WSXGA+1680x1050 Pixel Pitch 0.282mm 0.258mm Panel Display Color 16.2M Splendid (Video Intelligence) Yes Analog 15-Pin D-Sub Digital 24-Pin DVI-D Inputs PC Audio Line-in 3.5mm mini jack Speaker 1W x 2 Stereo, RMS Output Earphone 3.5mm mini jack Tile +20~-5 Wall Mounting (VESA) Yes(100mm) ME Color Black Security Kensington lock Yes Power Supply AC: 100~240V Power on mode <65W Power Standy by mode <2W Net (WxHxD) 514x401x228 mm 476x378x228 mmDimension Packing (WxHxD) 610x510x220 mm 566x465x203 mmNet 6.1kg 5.7kg Weight Gross 8.1kg 7.1kg Accessory DVI,D-sub cable, Audio cable, Power cord, Quick Start Guide,User manualRegulation Approval Energy Star 2006, UL/cUL, CB, CE, FCC, CCC, BSMI, Gost-R, C-Tick, MIC,WHQL 3III. MMI Front side 1. Headphone port This port connects a headphone with a stereo mini-plug (3.5mm). z The headphone port is under the icon z The headphone is purchased separately, 2. SPLENDID Button: z Use this hotkey to switch from five video preset modes (Game Mode, Night View Mode, Scenery Mode, Standard Mode, and Theater Mode) with SPLENDID™ Video Enhancement Technology. z Exit the OSD menu or go back to the previous menu as the OSD menu is active. z Automatically adjust the image to its optimized position, clock, and phase by pressing this button for 2-4 seconds. 3. ◄−Button: z Press this button to decrease the value of the function selected or move left/up to the previous function. z This is also a hotkey for Volume adjustment. 44. MENU Button: z Press this button to enter/select the icon (function) highlighted while the OSD is activated. 5.+►Button: z Press this button to increase the value of the function selected or move right/down to the next function. z This is also a hotkey for Brightness adjustment. 6. Power button/power indicator z Press this button to turn the monitor on/off z The color definition of the power indicator is as the below table. LED Status Description Blue Power ON Amber Standby mode OFF Power OFF 5Back side Rear Connectors (From left to right) 1. PWR port. This port connects the power connector from the bundled power cord. 2. Audio-in port. This port connects PC audio source by the bundled audio cable. 3. DVI port. This 24-pin port is for PC (Personal Computer) DVI-D digital signal connection. 4. VGA port. This 15-pin port is for PC VGA connection. Rear Connectors 6IV. Menu & Operating Mode Menu Splendid Image Color (1) Scenery Mode (2) Standard Mode (3) Theater Mode (4) Game Mode (5) Night View Mode (1) Brightness (2) Contrast (3) Sharpness (4) Saturation (5) Position (For VGA only)(6) Focus (For VGA only) (1) Color Temp. (2)Skin Tone Input Select System Setup (1) <VGA> (2) <DVI> (1) Volume (2) OSD Setup (3) Language (4) Information (5) Reset Supported Operating Mode Standard Vertical FrequencyPixel FrequencyResolutionHorizontal Frequency DOS 70Hz 28.32MHz 720 x 400 31.47KHz 60Hz 25.18MHz 640 x 480 31.47KHz 72Hz 31.50MHz 640 x 480 37.90KHz VGA 75Hz 31.50MHz 640 x 480 37.50KHz 56Hz 36.00MHz 800 x 600 35.16KHz 60Hz 40.00MHz 800 x 600 37.90KHz 72Hz 50.00MHz 800 x 600 48.10KHz SVGA 75Hz 49.50MHz 800 x 600 46.90KHz 60Hz 65.00MHz 1024 x 768 48.40KHz 70Hz 75.00MHz 1024 x 768 56.50KHz XGA 75Hz 78.75MHz 1024 x 768 60.02KHz 60Hz 108.00MHz 1280x1024 64.00KHz SXGA 75Hz 135.00MHz 1280x1024 80.00KHz VESA 75Hz 108.00MHz 1152 x 864 67.50KHz VESA 60Hz 106.00MHz 1440 x 900 55.94KHz VESA (Primary) 60Hz 146.25MHz 1680x1050 65.29KHz 7V. Disassembly & Assembly 1. Precaution Please read the precautions as follows to prevent any damages to the LCD Monitor and also select the appropriate tools for disassembly and re-assembly.  Make sure all power connection is removed. Be sure that the LCD Monitor is in power off status.  Prepare soft cloth and sponge as working platform to place LCD monitor horizontally.  Hold LCD by the side carefully and DON’T touch or press panel directly.  Remove all rings, watches and any other metal objects from your hands which possible to cause scratch.  Always wear a ground strap or anti-static glove to protect the parts from static discharge. ESD (electro-static discharge) protection is required to guarantee the safety of product and personnel. [...]...2 Suggest Tools Here are some tools that can be used for the LCD monitor’s service and repair Philips-head Screwdriver Use a Philips-head screwdriver to fasten/remove the K- or B-typed screws P/N：N/A Gloves To protect LCD Panel and your hand P/N: (L) 1 6-0 03300131 (M) 1 6-0 03300130 C/D Disassembly Tool Use C/D Disassembly Tool to open cosmetic cover and avoid scratch... screws P/N: N/A 8 3 Disassembly Procedure Information in this section is to perform the disassembly procedure of the LCD monitor Depending on the failures, replace the defective parts accordingly Asus MW221/201 LCD Monitor consists of various subsystems This section describes the procedures for LCD monitor disassembly In addition, the detailed disassembly procedures of individual subsystem will be provided... Subsystem 1 Remove 2 screws on I/O BRACKET, and then pull down to dismount it 2 Remove 3 pieces of TAPE 3 Release 2 screws on PANEL FRAME 16 4 Separate LCD PANEL form BEZEL 5 Loose 4 screws on left and right side of LCD PANEL 6 Separate PANEL FRAME from LCD PANEL 17 3.4 Bezel Subsystem 1 Remove 1 TAPE on KEY BOARD 2 Release 2 screws on KEY BOARD 3 Turn over KEY BOARD, and then unplug SPEAKER CABLES and... 4 screws on SPEAKERS to dismount them form BEZEL 19 4 Assemble Procedure Information in this section is to perform the assembly procedure of the LCD monitor Asus MW221/201 LCD monitor consists of various subsystems This section describes the procedures for LCD monitor assembly In addition, the detailed assembly procedures of individual modules will be provided for your service needs The assembly procedure... and SPEAKER CABLES with KEY BOARD 21 3 Mount KEY BOARD on BEZEL, and then tighten 2 screws on it 4 Paste 1 TAPE 22 4.2 Panel Subsystem 1 Assemble PANEL FRAME with LCD PANEL 2 Tighten 4 screws on left and right side of PANEL FRAME 3 Mount LCD SUBSYSTEM with BEZEL 4 Secure 2 screws on PANEL FRAME 23 5 Paste 3 pieces of TAPE 6 Assemble I/O BRACKET, and then tighten 2 screws on it 24 4.3 Board Subsystem... HW Block Diagram Flat Panel and CCFL backlight Power Board (Include, adapter, inverter) Main Board Audio Board Key Board RS232 Connector For white balance adjustment in factory mode Video signal, DDC AC-IN 100V～240V HOST Computer MW221/20 31 . Analog 15-Pin D-Sub Digital 24-Pin DVI-D Inputs PC Audio Line-in 3.5mm mini jack Speaker 1W x 2 Stereo, RMS Output Earphone 3.5mm mini jack Tile +20 ~-5 Wall. Preset Modes (hotkey) & 3 Skin-tones z Dual Signal Input (DVI-D and D-Sub) z DVI cable/D-Sub cable provided z Built-in Stereo Speakers with Earphone