Download BenQ G922HDL Service manual
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Applicable Country & Regions: Global Service Manual for BenQ: LCD G925HDA (D-SUB + Glossy Chassis Colors) P/N: 9H.L2WLA.T8x Product Service Manual – Level 1~2 Version: 1st Date:03-17-2010 Notice: For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liability statements. Please check BenQ’s eSupport web site, http://esupport.benq.com, to ensure that you have the most recent version of this manual. First Edition (Mar. 2010) © Copyright BenQ Corporation 2010. All Right Reserved. 1 18.5″ LCD Color Monitor BenQ G925HDA Content Index 1. About this Manual ................................................................................................................................................... 5 1.1 Important ............................................................................................................................................................ 5 1.2 Trademark .......................................................................................................................................................... 5 2. Introduction ............................................................................................................................................................. 6 2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS. .................................................... 6 2.2 Safety Warning and Notice ................................................................................................................................. 6 2.3 Compliance Statement ....................................................................................................................................... 7 3. General Description ................................................................................................................................................ 8 4. Related service information................................................................................................................................... 8 5. Product Overview ................................................................................................................................................... 9 5.1 Monitor Specifications ........................................................................................................................................ 9 5.2 Packing ............................................................................................................................................................. 11 Level 1 Cosmetic / Appearance / Alignment Service ............................................................................................ 13 Visual Inspection & Cleaning .................................................................................................................................. 13 Software/Firmware Upgrade Process .................................................................................................................... 13 Level 2 Circuit Board and Standard Parts Replacement ...................................................................................... 27 Product Exploded View .......................................................................................................................................... 27 Six Angles’ View ..................................................................................................................................................... 29 Product Disassembly .............................................................................................................................................. 30 Block Diagram ........................................................................................................................................................ 34 Schematic Diagram ................................................................................................................................................ 36 Troubleshooting ...................................................................................................................................................... 44 PCB LAYOUT ......................................................................................................................................................... 50 Appendix 1 – Screw List / Torque ........................................................................................................................... 57 2 18.5″ LCD Color Monitor BenQ G925HDA Abbreviations & Acronyms A ADC Analog to Digital Converter AFC Automatic Frequency Control: control signal used to tune to the correct frequency B BenQ BenQ Corporation BTSC Broadcast Television System Committee C CPU CVBS Central Process Unit Composite Video Blanking and Synchronization D DLP Digital Light Processing / Texas Instruments® DMD Digital Micro mirror Device DRAM DVI Dynamic RAM Digital Visual Interface DVI-D Digital Visual Interface-digital DVI-I Digital Visual Interface-Integrated E EEPROM Electrically Erasable and Programmable Read Only Memory F FLASH FLASH memory G G-TXT Green Teletext H HDMI HP High Definition Multimedia Interface, digital audio and video interface Head Phone I 2 IC Integrated IC bus L LED LVDS Light Emitting Diode Low Voltage Differential Signal, data transmission system for high M 3 18.5″ LCD Color Monitor MOSFET BenQ G925HDA Metal Oxide Semiconductor Field Effect Transistor N NC NVM Not Connected Non Volatile Memory: IC containing TV related data (for example, options) O OSD On Screen Display P PC PCB Personal Computer Printed Circuit Board (or PWB) R RC RGB ROM Remote Control transmitter Red, Green and Blue. The primary color signals for TV. By mixing levels of R, G and B, all colors (Y/C) are Read Only Memory S SDA SDRAM SW 2 Data signal on I C bus Synchronous DRAM Sub Woofer / Software T THD Total Harmonic Distortion V VGA Video Graphics Array Y YPbPr Y/C Component video (Y= Luminance, Pb / Pr= Color difference signals B-Y and R-Y, other amplitudes w.r.t. to YUV) Video related signals: Y consists of luminance signal, blanking level and sync; C consists of color signal. 4 18.5″ LCD Color Monitor BenQ G925HDA 1. About this Manual The purpose of Service Manual is to provide a guide line to engineers to repair different models. The appearance and capability is introduced in this Service Manual. It is better for repair engineer to have a rough idea of this model through reading the Service Manual. Please do pay attention to the item part of the disassembly when repair the machine and also do the protection of panel any time. When repairing the circuit board, please follow the requirement of RoHS and refer to the circuit diagram and repairing process that attached in the Service Manual. The method of firmware updated, the way of using the menu and some information that may be used when repairing are also attached in the Service Manual that provide repair engineer various choice. 1.1 Important Only trained service personnel who are familiar with this BenQ Product shall perform service or maintenance to it. Before performing any maintenance or service, the engineer MUST read the “Important Safety Information”. 1.2 Trademark 5 18.5″ LCD Color Monitor BenQ G925HDA 2. Introduction This section contains general service information, please read through carefully. It should be stored for easy access place. 2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS. The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a legal requirement by EU (European Union) for the global electronics industry which sold in EU and some counties also require this requirement. Any electrical and electronics products launched in the market after June 2006 should meet this RoHS requirements. Products launched in the market before June 2006 are not required to compliant with RoHS parts. If the original parts are not RoHS complaints, the replacement parts can be non ROHS complaints, but if the original parts are RoHS compliant, the replacement parts MUST be RoHS complaints. If the product service or maintenance require replacing any parts, please confirming the RoHS requirement before replace them. 2.2 Safety Warning and Notice Installation 1. Do not use your monitor under any of the following environmental conditions: • Extremely high or low temperature, or in direct sunlight • Dusty places • Highly humid, exposed to rain, or close to water • Exposed to vibrations or impacts in places such as cars, buses, trains, and other rail vehicles • Near heating appliances such as radiators, heaters, fuel stoves, and other heat-generating items (including audio amplifiers) • An enclosed place (such as a closet or bookcase) without appropriate ventilation • An uneven or sloping surface • Exposed to chemical substances or smoke 2. Do not block vents and openings by clothes or curtains. 3. Carry the monitor carefully. 4. Do not place the monitor face down on the floor or a desk surface directly. Otherwise, scratches on the panel surface may occur. 5. Do not place heavy loads on the monitor to avoid possible personal injury or damage to the monitor. 6. Ensure that children do not hang or climb onto the monitor. 7. Keep all packing bags out of reach of children. 6 18.5″ LCD Color Monitor BenQ G925HDA Operation 1. To protect your eyesight, please refer to the user manual to set the optimal screen resolution and the viewing distance. 2. To reduce eye fatigue, take a break on a regular basis while using the monitor. Avoid taking either one of the following actions for a long time. Otherwise, burn marks may occur. • Use the monitor in the aspect ratio of 4:3, 5:4, or 16:10. • Place a still image (such as an OSD menu, fixed text or image) on the screen. 3. To avoid possible damage to the monitor, do not touch the monitor panel by hand, pen, or any other sharp objects. 4. Excessively frequent plug and unplug of video connectors (D-sub) may cause damage to the monitor. 5. This monitor is designed mainly for personal use. If you want to use the monitor in a public place or a harsh environment, contact your nearest BenQ service center for assistance. 6. To avoid possible electric shock, do not dissemble or repair the monitor. 7. If a bad smell or an abnormal sound appears to come from the monitor, contact your nearest BenQ service center for assistance immediately. Cleaning 1. Ensure that the power is unplugged before cleaning your monitor 2. Use a monitor cleaner and a soft cloth to clean your monitor. 3. Do not use solvents such as alcohol to clean your monitor. Power 1. To avoid possible damage to the monitor, do not use it in a region where power supply is unstable. 2. Ensure that the power cord is connected to a grounded power outlet before turning on the monitor. 3. Use only the power cord provided by BenQ. 4. Never use a power cord that appears to be damaged or frayed. 5. To avoid possible danger, observe the total electric load when using the monitor with a (multi-outlet) extension cord. 6. Always turn off the monitor before unplugging the power cord. 2.3 Compliance Statement Caution: This Optical Storage Product contains a Laser device. Refer to the product specifications and your local Laser Safety Compliance Requirements. 7 18.5″ LCD Color Monitor BenQ G925HDA 3. General Description This new LCD (Liquid Crystal Display) monitor BenQ G925HDA offers numerous features and functions, for example: • TFT display (Thin Film Transistor; active matrix) • Minimal space requirements thanks to slim casing • Optimum ergonomic characteristics (totally distortion-free, excellent picture definition and color purity right into the corners) • Contrast ratio 20000:1, brightness 250nits • MAX. resolution (1366x768) • Presentation of up to 16.7 M colors (in conjunction with an appropriate graphics card) • Automatic scanning of horizontal frequencies from 30 to 63 KHz and refresh rates (vertical frequencies) from 50 to 76 Hz (absolutely flicker-free) • Digital screen controller with microprocessor for storing 15 different display modes • Freely adjustable color alignment for matching the screen colors to the colors of various input and output devices • Convenient operation via integrated OSD (On-Screen-display) menu • VESA-DDC compatibility • Plug & play capability • Power management for reducing power consumption when the computer is not in use This operating manual contains important information you require to start up and run your LCD monitor. This specification defines the requirements for the 18.5″ MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15-pin VGA connector, also supports VESA DPMS power management and plug & play function. Additional information Due to the nature of liquid crystal display (LCD) technology, the picture resolution is always fixed. For the best display performance, please set the display resolution to 1366x768 pixels with an aspect ratio of 16:9. This is called “Native Resolution” or maximal resolution - that is, the clearest picture. Lower resolutions are displayed on a full screen through an interpolation circuit. Image blurring across pixel boundaries can occur with the interpolated resolution depending upon the image type and its initial resolution. 4. Related service information This Service Manual contains general information. There are 2 levels of service: Level 1: Cosmetic / Appearance / Alignment Service Level 2: Circuit Board or Standard Parts Replacement Service Web Site eSupport URL: http://esupport.benq.com 8 18.5″ LCD Color Monitor BenQ G925HDA 5. Product Overview 5.1 Monitor Specifications G925HDA Configuration (D-sub) Panel Type (TN / VA / IPS) Panel Size Display Area Max. Resolution Pixel Pitch Brightness (Typ.) Panel / Display Contrast Ratio (Typ.) / DCR (Min.) Viewing Angle (H/V), CR≧10 Power Supply 1366x768 0.10*RGB(H)mm x 0.30(V)mm 200 nits 600:1 (Panel) /40000:1 GtG response Time N/A NTSC ratio 0.72 Panel maker LGD BenQ SenseyeTM Technology Yes 5 Modes (by hotkey) : Standard / Movie / Dynamic / Photo / s-RGB Normal (6500°K) / Reddish (5800°K) / Bluish (9300°K) / User Mode Hor. Frequency (KHz) 30~63KHz Ver. Frequency (Hz) 50Hz~76Hz Speakers (built-in) Video Input 110Mhz N/A D-sub Audio line in No Earphone Jack No Voltage Rating AC: 100~240V (Built-in) Power-On Mode 23W Standby Mode <1W 9 TYP) 90/50 5ms (Tr+Tf) Color Temperature Selection (DCR Min :20000:1 Response Time PC Input/Output 403.4 x 254.6 16.7M (6bit+Hi-FRC) Video Bandwidth (MHz) Audio 18.5"W(2 lamps) Display Colors BenQ SenseyeTM Preset Modes Video TN 18.5″ LCD Color Monitor BenQ G925HDA Power Off Mode Chassis Colors Carton <0.5W Silver Black/Black Original carton with BE flute Power LED Tilt (Up / Down) Green (ON)/ Amber (Standby) 20° ~ -5° VESA Wall Mount 100 x 100mm Kensington Lock Yes Physical Dimension (WxHxD) TBD Box Dimension (WxHxD) TBD Net Weight (Esti.) TBD Gross Weight (Esti.) TBD Container Loading (40') 2070 Container Loading (20') 990 Mechanical Design 17 Languages (English / Francais Deutsch / Italiano / Espanol / Multi-language Support / Polish / Czech / Hungarian / Serbo-croatian / OSD Romanian / Netherlands / Russian / Swedish / Protuguese / Japanese / Chinese / S-Chinese) Other feature Vista Vista Basic VGA cable, power cord, warranty card, Accessories quick start guide, CD manual Regulation Approvals Refer to the worksheet "RFQ-Regulatory" 10 18.5″ LCD Color Monitor BenQ G925HDA 5.2 Packing When packing the monitor into the carton, please follow the pictures as below. 1. Using the EPE bag to pack the monitor without base 2. Using the EPS to pack the monitor 11 18.5″ LCD Color Monitor BenQ G925HDA 3. Putting the user manual and power cord in the position as the picture shows below. Power cord User manual 12 18.5″ LCD Color Monitor BenQ G925HDA Level 1 Cosmetic / Appearance / Alignment Service Visual Inspection & Cleaning • Cleaning. Always unplug your monitor from the wall outlet before cleaning. Clean the LCD monitor surface with a lint-free, non-abrasive cloth. Avoid using any liquid, aerosol or glass cleaners. • Slots and openings on the back or top of the cabinet are for ventilation. They must not be blocked or covered. Your monitor should never be placed near or over a radiator or heat source, or in a built-in installation unless proper ventilation is provided. • Never push objects or spill liquid of any kind into this product. Software/Firmware Upgrade Process Hardware Requirement: 1) ISP board (715GT034-D for BenQ) 2) Printer cable(x1), VGA cable (x1), 12V DC power source 3) PC or notebook with parallel (printer) port x 1 Software Requirement: 1) PORT95NT.exe 2) Realtek_ISP_Tool 3Bank For BenQ ver4.3.exe 3) TPVDDC.exe Step 1: Install the “PORT95NT.exe” 1. Double click the icon to install the “PORT95NT”, and then restart the computer. Step 2: Writing the ISP data 1. Press the button 1 and connect the ISP board as follow: 1 Connect to PC LPT 12V DC input Connect to the VGA port of the monitor 13 18.5″ LCD Color Monitor BenQ G925HDA 2. Open the software “Realtek_ISP_Tool 3Bank For BenQ ver4.3.exe”, and then click “RTD 2122 ISP” Note: The process of the ISP writing takes G2020HD for example. 3. Click “Main1: 64k”, and choose the file “BenQ G2020HD 2545LH _SEC.H00” 14 18.5″ LCD Color Monitor BenQ G925HDA 4. Click “Open”, it will show the below picture 5. Click “Main2: 64~128K”, and choose the file “BenQ G2020HD 2545LH _SEC.H01” 6. Click “128~160”, and choose the file “BenQ G2020HD 2545LH _SEC_EXTEND.hex” 15 18.5″ LCD Color Monitor 7. Click BenQ G925HDA , if it is successful it will show the below pictures: 16 18.5″ LCD Color Monitor BenQ G925HDA Adjustment / Alignment Procedure The Control Panel 1. “AUTO”: Adjust vertical position, phase, horizontal position and pixel clock automatically. 2. “MENU” key: Activate OSD main menu and return to the previous menu or exit OSD. 3. ◄ /Mode key: For Left/Decrease adjustment. The key is the hot key for Mode. 4. ► /Contrast/Brightness key: For Right/Increase adjustment. The key is the hot key for Brightness and Contrast. 5. “ENTER” key: Enter sub menus and select items. For models with DVI inputs, this key is also the hot key for Input. 6. “Power”: Turn the power on or off. OSD = On Screen Display. The hot keys will display a graduated scale for adjusting the value of that setting, and will only operate while the OSD menu is not currently displaying. Hot key displays will disappear after a few seconds of no key activity. Hot Key Mode The monitor keys perform as hot keys to provide direct access to particular functions whenever the menu isn't currently displaying on-screen. Brightness and Contrast hot keys Press the ► key to display the Brightness and Contrast indicators. Further press the the ◄or ► keys, then the ENTER key to select Brightness or Contrast. The ► key will increase the level, while the ◄ key will decrease the level. To exit, press the MENU key. 17 18.5″ LCD Color Monitor BenQ G925HDA Mode Hot Key Press the ◄ key continually to switch between the 6 modes for the main window, including Standard, Movie, Dynamics, Photo, and sRGB. The setting will take effect immediately. Input Hot Key Press the ENTER key to toggle between different PC video signal inputs that may be connected to your monitor. The setting will take effect immediately. Main Menu Mode You can use the OSD (On Screen Display) menu to adjust all the settings on your monitor. Press the MENU key to display the following main OSD menu. There are five main OSD menus: 1. Display 2. Picture 3. Picture Advanced 4. System Use ◄ (left) or ► (right) keys to highlight a menu item, and press the ENTER key to enter the Menu item settings. The OSD menu languages may differ from the product supplied to your region. 18 18.5″ LCD Color Monitor BenQ G925HDA Display Menu 1. Press the MENU key to display the main menu. 2. Press ◄ or ► keys to select DISPLAY and then press the ENTER key to enter the menu. 3. Press ◄ or ► keys to move the highlight to a menu item and then press the ENTER key to select that item. 4. Press ◄ or ► keys to make adjustments or selections. 5. To return to the previous menu, press the MENU key. Item Auto Adjustment Function Operation Optimizes and adjusts the screen settings automatically for you. Press the ENTER The AUTO key is a ‘hot key’ for this function. key to select this When you connect a digital video output using a digital (DVI) option and make cable to your monitor, the AUTO key and the Auto adjustment. Range Adjustment function will be disabled. H. Position Adjusts the horizontal position of the screen image. V. Position Adjusts the vertical position of the screen image. Pixel Clock Adjusts the pixel clock frequency timing to synchronize with the analog input video signal. Not applicable to a digital input signal. Phase Adjusts the pixel clock phase timing to synchronize with the analog input video signal. Not applicable to a digital input signal. Picture Menu 19 0 to 100 Press ◄ or ► keys to adjust the value. 0 to 100 0 to 100 0 to 63 18.5″ LCD Color Monitor BenQ G925HDA 1. Press the MENU key to display the main menu. 2. Press ◄ or ► keys to select PICTURE and then press the ENTER key to enter the menu. 3. Press ◄ or ► keys to move the highlight to a menu item and then press the ENTER key to select that item. 4. Press ◄ or ► keys to make adjustments or selections. 5. To return to the previous menu, press the MENU button. Item Brightness Contrast Sharpness Function Adjusts the balance between light and dark shades. Operation Press the ► key to increase the brightness and press the ◄ key to decrease the Press the ►key to increase the contrast and between darkness and lightness. press the ◄ key to decrease the contrast. edges of the subjects in the image. 0 to 100 brightness. Adjusts the degree of difference Adjusts the clarity and visibility of the Range 0 to 100 Press the ► key to improve the crispness of the display and press the ◄ key to have 1 to 5 softness effect on the display. Color - Press ENTER to enter the Color menu. Allows video and still photographs to Normal be viewed with natural coloring. This is the factory default color. Applies a cool tint to the image and is Bluish factory pre-set to the PC industry Press ◄ or ► keys to select this option. standard white color. Applies a warm tint to the image and is Reddish factory pre-set to the news print standard white color. Tailors the image color tint. The blend of the Red, Green and Blue primary colors can be altered to change the • Red color tint of the image. Decreasing one or more of the colors Press ◄ or ► keys and the ENTER key to will reduce their respective influence select Red, Green, or Blue. Then use Press on the color tint of the image. (e.g. if ◄ or ► keys to make the color adjustments. you reduce the Blue level the image User Mode (0 to 100) • Green (0 to 100) • Blue (0 to 100) will gradually take on a yellowish tint. If you reduce Green, the image will become a magenta tint.) Hue: Adjustment the degree of how we perceive colors Saturation: Adjust the purity degree of colors. Press ◄ or ► keys to adjust the settings. 0 to 100 Press ◄ or ► keys to adjust the settings. 0 to 100 The above options for Hue and Saturation are available only if the signal source is Component Video or HDMI. 20 18.5″ LCD Color Monitor BenQ G925HDA Reset Resets the User Mode custom color Color settings to the factory defaults. YES Press ◄ or ► keys to adjust the settings. NO Press MENU to leave the Color menu. Dynamic Contrast (available when the Picture Mode is set to Photo, Dynamics, The function is to automatically detect the distribution of an input visual signal, and then to create the optimal Press the ENTER key to select this option. contrast. The higher the level, the Press ◄ or ► keys to change the settings. 0 to 5 more detailed picture possible will be displayed. or Movie) Picture Advanced Menu 1. Press the MENU key to display the main menu. 2. Press ◄ or ► keys to select PICTURE ADVANCED and then press the ENTER key to enter the menu. 3. Press ◄ or ► keys to move the highlight to a menu item and then press the ENTER key to select that item. 4. Press ◄ or ► keys to make adjustments or selections. 5. To return to the previous menu, press the MENU button. Item Function Operation Range Selects a picture mode that best suits the type of images shown on the screen. Standard • Standard - for basic PC application. • Movie - for viewing videos. Picture Mode • Dynamics - for viewing landscape-specific videos and playing games. Press ◄ or ► keys to change the settings. Movie Dynamics Photo sRGB • Photo - for viewing still images. • sRGB - for better color matching representation with the peripheral devices, such as printers, DSCs, etc. 21 18.5″ LCD Color Monitor BenQ G925HDA Senseye Demo Displays the preview of screen images under (available when the selected mode from Picture Mode. The the Picture Mode screen will be divided into two windows; the left is set to Photo, window demonstrates images of Standard Dynamics, or mode, while the right window presents the Movie) images under the specified mode. Press ◄ or ► keys to ON change the settings. OFF • Full - Scales the input image to fill the screen. Press ◄ or ► keys to • Full Ideal for 16:9 aspect images. change the settings. • Aspect This feature is provided to allow aspect ratio’s other than 16:9 to be displayed without geometric distortion. Display Mode • Aspect - The input image is displayed without geometric distortion filling as much of the display as possible. System menu 1. Press the MENU key to display the main menu. 2. Press ◄ or ► keys to select SYSTEM and then press the ENTER key to enter the menu. 3. Press ◄ or ► keys to move the highlight to a menu item and then press the ENTER key to select that item. 4. Press ◄ or ► keys to make adjustments or selections. 5. To return to the previous menu, press the MENU button. Item Function Use this to change the input to that Input appropriate to your video cable connection type. Operation Press ◄ or ► keys to change the setting. OSD Settings - Press ENTER to enter the OSD Settings menu. 22 Range D-sub (VGA) 18.5″ LCD Color Monitor BenQ G925HDA • English • French • German • Italian • Spanish Press ◄ or ► keys to change the settings. Language Sets the OSD menu Language. The language options displayed on your OSD may differ from those shown on the right, depending on the product supplied in your region. • Polish • Czech • Hungarian • Serbo-Croatian • Romanian • Dutch • Russian • Swedish • Portuguese • Japanese • Traditional Chinese • Simplified Chinese H. Position V. Position Display Time Adjusts the horizontal position of 0 to 100 the OSD menu. Adjusts the vertical position of the Press ◄ or ► keys to change the OSD menu. settings. 0 to 100 5 / 10 / 15 / 20 / Adjusts the display the OSD menu. 25 / 30 sec Press ◄ or ► keys to change the settings. To unlock the OSD controls when the OSD is preset to be OSD Lock Prevents all the monitor settings locked, press and hold the from being accidentally changed. "MENU" key for 15 seconds to YES When this function is activated, the enter the "OSD Lock" option and NO OSD controls and hotkey make changes. operations will be disabled. Alternatively, you may use ◄ or ► keys to select "NO" in the "OSD Lock" submenu from the "OSD Settings" menu, and all OSD controls will be accessible. Press MENU to leave the OSD Settings menu. DDC/CI* Allows the monitor settings to be Press the ENTER key to select ON set through the software on the PC. this option. Press ◄ or ► keys to OFF 23 18.5″ LCD Color Monitor BenQ G925HDA change the settings. Information Displays the current monitor Press the ENTER key to select property settings. this option. Resets all mode, color and Reset All geometry settings to the factory default values. Press ◄ or ► keys to change the YES settings. NO *DDC/CI, short for Display Data Channel/Command Interface, which was developed by Video Electronics Standards Association (VESA). DDC/CI capability allows monitor controls to be sent via the software for remote diagnostics. 24 18.5″ LCD Color Monitor BenQ G925HDA Display Timing Table Hor. Ver. Frequency Frequency (kHz) (Hz) 640 x 350 31.47 70.09 25.18 VGA 640 x 480 31.47 59.94 25.175 VGA 640 x 480 37.50 75.00 31.500 VGA 720 x 400 31.47 70.08 28.321 VGA 800 x 600 37.88 60.32 40.000 VESA 800 x 600 46.88 75.00 49.500 VESA 832 x 624 49.72 74.55 57.283 MAC 1024 x 768 48.36 60.00 65.000 VESA 1024 x 768 60.02 75.03 78.750 VESA 1024 x 768 68.68 85.00 94.500 VESA 1152 x 720 44.86 60.00 66.750 CVT 0.83MA, DVT 16:10 1152 x 870 68.68 75.06 100.000 MAC 1152 x 900 61.80 65.96 92.978 SUN 1280 x 768 47.396 60.0 68.25 CVT 0.98M9-R 1280x800 49.702 59.81 83.5 CVT-8 1280x800 62.8 75 106.5 1280x720 45.00 59.94 74.25 1280x720 44.77 59.86 74.5 1280x720 56.46 74.78 95.75 1280 x 960 60.00 60.00 108.000 VESA 1280 x 1024 63.98 60.02 108.000 VESA 1280 x 1024 79.98 75.02 135.000 VESA 1280 x 1024 91.15 85.02 157.500 VESA 1360x768 47.7 60.01 85.5 VESA 1366x768 47.76 59.85 85.5 1440 x 900 55.94 59.89 106.500 1440x900-R 55.94 59.89 88.75 1440 x 900 70.6 75 136.75 Pixel Format Pixel Clock (MHz) Source CVT 1.30MA • Image disruption may occur as a result of signal frequency differences from graphic cards which do not correspond with the usual standard. This is not, however, an error. You may improve this situation by altering an automatic setting or by manually changing the phase setting and the pixel frequency from the “DISPLAY” menu. • To extend the service life of the product, we recommend that you use your computer's power management function. 25 18.5″ LCD Color Monitor BenQ G925HDA Factory OSD Menu Turn off the monitor, keep pressing the “MENU” buttons, and turn on the monitor, then when we press the MENU button, the factory OSD will be at the left top of the panel as below (takes E2220HD for example): BenQ Service Page 1. Trigger method: press “Menu” key and Power on. 2. Press the menu key will display the service page 3. Press the menu key will close the service page. 4. Power off will quit the service mode 5. At the service mode, the key function is same as normal OSD define. 6. The timer can only reset at the service mode by “Timer Reset” (Timer Reset moves to SI factory Area). And need to have a warning message to double confirm the reset function. The timer should record up to 99999 hours and will be reset once launch. 7. Add two selected items for DVI HDCP at Service menu HDMI HPD: To enable the hot plug pin detection. (HDMI port default: On) DVI HDCP: To disable the hot plug pin detection. (DVI port default: on) 8. Add BenQ logo on/off item, the default is “on” 9. Add the auto power on item, the default is “off ” 10. Add the timer reset warning message, when select the timer reset item, then the warning message will display and need to confirm it again and the default is “No”. 11. Panel type define need to have the panel version. 12. F/W version need to define the dual or analog model. 26 18.5″ LCD Color Monitor BenQ G925HDA Level 2 Circuit Board and Standard Parts Replacement Product Exploded View Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. Item Part NO. Description QTY Unit 1 Q34G0543ADP 3B0100 BEZEL(L185W-9benq) 1 PCS 2 Q33G0288 LENS 1 PCS 3 Q33G0287ADP 1L0100 KEY PAD 1 PCS 4 Q15G0405801 MAINFRAME 1 PCS 5 Q34G0544ADP EB0130 REAR COVER18.5" 1 PCS 6 Q33G0289ADPA1L0100 LOGO COVER 1 PCS 7 Q34G0545ADP 1B0100 Stand-Front 1 PCS 8 Q37G0125011 hinge 1 PCS 9 Q34G0546ADP 1B0130 Stand-Back 1 PCS 10 A33G0251ADP 2L0100 CABLE CLIP 1 PCS 11 Q34G0547ADP 1B0101 BASE 1 PCS 12 Q12G6082 FOOT PAD 1 PCS 13 Q23G3178881 1A LOGO for black 1 PCS 14 P15G8299 BKT-VESA 1 PCS 15 750GLU185X1854N000 PANEL M185XW01 V80D SH AUO 1 PCS 16 715G3327M02001004S MAIN BOARD 1 PCS 2 1C0100 1 3 27 18.5″ LCD Color Monitor 18 715G2852 3 19 715G3367 2 4 BenQ G925HDA POWER BOARD 1 PCS KEY BOARD 1 PCS Description QTY Unit SCREW Item Part NO. S1 0M1G 130 6120 PANEL& MAINFRAME 3 PCS S2 0M1G1030 6120 PCB & MAINFRAME 4 PCS S3 AQ1G1740 12120 HINGE & STAND 2 PCS S4 0M1G1740 HINGE & STAND 1 PCS S5 AM1G1740 12 47 CR3 HINGE & STAND&MAINFRAME 2 PCS Part NO. Description QTY. Unit Q44G8015101 EPS 1 PCS Q44G8015201 EPS 1 PCS Q44G8015624 1A CARTON 1 PCS 8 47 CR3 ART. 28 18.5″ LCD Color Monitor BenQ G925HDA Six Angles’ View 29 18.5″ LCD Color Monitor BenQ G925HDA Product Disassembly 1) Remove the base Place the monitor face down on a smooth surface. Be careful to avoid scratch and injury during the process of uninstall. And then remove the base. 2) Remove the stand Be careful to avoid scratch and injury during the process of uninstall. And then remove the screws in red to remove the base. 30 18.5″ LCD Color Monitor 3) BenQ G925HDA Remove the rear cover Remove the rear cover as follow: 31 18.5″ LCD Color Monitor 4) BenQ G925HDA Remove the key board from the bezel. 5) Remove the main frame from the panel. 32 18.5″ LCD Color Monitor BenQ G925HDA 6) Remove the boards from the main frame. 7) The panel 33 18.5″ LCD Color Monitor BenQ G925HDA Block Diagram Main Board Crystal 24MHZ Panel Interface (CN601) (X401) MCU RTD2122L-LF Scalar IC RTD2035L (U401) (U501) DDC1_SCL DDC1_SDA H sync V sync RGB Key Control Interface D-Sub Connector (CN202) (CN301) 34 18.5″ LCD Color Monitor BenQ G925HDA Power Board AC input EMI filter Bridge Rectifier and Filter Rectifier diodes Transformer Start Circuit: R904, R932, R933 CN902 Feedback Circuit PWM Control IC 5V 12V ON/OFF Output Circuit Lamp MOSFET Transformer Feedback Circuit PWM ON/OFF Control Control IC (IC801) Over Voltage 35 DIM 18.5″ LCD Color Monitor BenQ G925HDA Schematic Diagram Main Board CN201 1 2 3 4 5 6 7 8 9 CMVCC CMVCC CMVCC BKLT-VBRI BKLT-EN C_PANEL_INDEX Volume# Mute FB202 MVCC DIM# {4} PANEL_ID# Volume# Mute {4} {4} {4} NC CMVCC FB201 3 VIN VOUT 2 VSS 120 CONN VCC3 U201 C202 + C204 AP1117E33LA C205 C203 100UF25V + 1 100UF25V 0.1uF/16V 0.1uF/16V Panel ID(3.3V PWM) Back light Dimming(3.3V PWM) VCC3 * BKLT-EN High ON(3.3V) BKLT-EN R202 4K7 1/16W R201 200 1 / 1 6 W C206 0.1uF/16V Q202 PMBS3904 INV_ON# {4} VCC3 R207 120R 1/16W R208 120R 1/16W Q204 PMBS3906 R210 CN202 1 2 3 4 5 6 KEY 0 KEY 1 POWER_KEY # LED_G LED_R 10K 1/16W C201 ZD201 NC {4} 10K 1/16W LED_G# {4} Q205 PMBS3906 LED_G C210 0.1uF/16V 0.1uF/16V 1 ZD203 NC C209 0.1uF/16V 1 NC 2 2 2 ZD202 LED_R# LED_R R213 1 CONN KEY 0 {4} KEY 1 {4} POWER_KEY # {4} Near to Connect OEM MODEL BenQ G922HDAL Size B 絬 隔 瓜 絪 腹 G2498-2A-AO-X-16-091216 TPV MODEL T89ARPMCFWBQNN Rev 1.0 Key Component 3.POWER PCB NAME 715G2498-2A-AO 称爹 <称爹> T P V ( Top Date 36 Victory Electronics Co . , Ltd. ) Wednesday , December 16, 2009 Sheet 3 of 7 18.5″ LCD Color Monitor DSUB_V BenQ G925HDA {4} R301 100R 1/16W R303 100R 1/16W RTD_H RTD_V {5} {5} 2 2 ZD303 ZD302 R304 2.2K 1 / 1 6 W R305 2.2K 1 / 1 6 W RLZ5.6B RLZ5.6B C302 C303 FB302 22pF VGA_B+ 1 RTD_B+ 2 BEAD 1 1 R306 100R 1/16W C304 22pF RTD_B+ {5} RTD_B- {5} RTD_G+ {5} RTD_G- {5} RTD_R+ {5} RTD_R- {5} CN301 16 DSUB_H R320 100R 1/10W 5% 13 12 2 11 C413 0.1uF/16V 2 VGA_B- RTD_B- C414 0.1uF/16V 0.047uF RLZ5.6B FB301 R309 100R 1/16W C307 RLZ5.6B VGA_G+ 1 2 RTD_G+ BEAD DB15 R310 C308 5pF/50V RLZ5.6B 75R 1/16W 1 RLZ5.6B 0.047uF R312 100R 1/16W C309 VGA_G- RTD_G0.047uF FB303 VGA_R+ 1 R313 100R 1/16W C301 RTD_R+ 2 R314 VGA_B+ VGA_R+ VGA_G+ BEAD C310 5pF/50V 75R 1/16W 0.047uF R315 100R 1/16W C311 VGA_R- RTD_R- C317 3 3 D301 BAV99 D302 BAV99 0.1uF/16V 0.1uF/16V 0.047uF D303 BAV99 C315 2 2 1 C316 1 3 R316 R317 R318 200R 1/10W 5% 200R 1/10W 5% 200R 1/10W 5% 2 1 VGA_BVGA_B+ VGA_GVGA_G+ VGA_RVGA_R+ R308 100R 1/16W C306 ZD305 ZD307 17 ZD301 R426 22R 1/10W 5% ZD304 0.047uF CMVCC 1 2 DDC1_SDA DSUB_5V 1 R319 100R 1/10W 5% 14 C305 5pF/50V 75R 1/16W VGA_CON DSUB_5V 2 DSUB_V {4} 10 5 9 4 8 3 7 2 6 1 15 DDC1_SCL 1 R428 22R 1/10W 5% {4} R307 R311 100R 1/16W DSUB_CONNECT {4} 0.1uF/16V OEM MODEL BenQ G922HDAL Size B 絬 隔 瓜 絪 腹 G2498-2A-AO-X-16-091216 TPV MODEL T89ARPMCFWBQNN Rev 1.0 Key Component 4.INPUT PCB NAME 715G2498-2A-AO 称爹 <称爹> T P V ( Top Date 37 Victory Electronics Co . , Wednesday , December 16, 2009 Ltd. ) Sheet 4 of 7 18.5″ LCD Color Monitor BenQ G925HDA DSUB_5V CMVCC CMVCC D401 C402 D402 BAV70 2 MCU_VCC BAT54C(NC) 1 NC C404 MCU_VCC R405 R406 R407 3 Q401 PMBS3904 U403 C412 R402 1K 1/16W NC NC NC NC MCU_VCC_S 1 2 3 4 1uF 10V R403 3.9K 1 / 1 6 W U402 AZ431AN-AE1 3 NC VCC NC WC NC SCL VSS SDA 8 7 6 5 R408 R409 R410 WP IICSCL IICSDA NC NC NC NC R404 10K 1/16W 2 1 MCU_VCC BAT54C MCU_VCC VCC 40 39 38 37 36 35 34 33 P1.0/T2 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 41 4 32 31 30 29 28 27 26 25 24 23 22 21 20 R425 10K 1/16W DSUB_V1 R427 NC/0R05 1/16W DSUB_V R429 0R05 1/16W CRY STAR_OUT DSUB_CONNECT R433 100R 1/16W R434 100R 1/16W R435 100R 1/16W POWER_KEY # KEY 1 KEY 0 NC NC NC NC P6.7 P6.6/CLKO1 P6.5 P6.4 P6.3/ADC3 P6.2/ADC2 P6.1/ADC1 P6.0/ADC0 42 43 R415 MCU_VCC VSY NC NC NC LED_G# LED_R# ASCL1/P3.0/RXD ASDA1/P3.1/TXD P3.2/INT0 P3.3/INT1 P3.4/T0 P3.5/T1 P7.6/CLKO2 P7.7 RTD_SD3/SDI {5} RTD_SCLK {5} C409 NC(22pF/16V) NC NC NC NC 18 19 9 10 11 12 13 14 RST 4K7 1/16W 5 8 IICSDA IICSCL WP RTD_SD3/SDI RTD_SCLK 6 7 PANEL_VCC DDC1_SCL DDC1_SDA P5.0/PWM0 P5.1/PWM1 P5.2/PWM2 P5.3/PWM3 P5.4/PWM4 P5.5/PWM5 DSCL2/P5.6 DSDA2/P5.7 VSS LED_G# LED_R# 44 45 46 47 48 1 2 3 100R 1/16W 100R 1/16W 1K 1/16W 1K 1/16W 100R 1/16W 100R 1/16W 17 {2} {2} DDC1_SCL DDC1_SDA U401 XO XI {3} {3} R420 R422 R423 R424 R430 R432 C405 C406 10UF50V 0.1uF/16V 15 16 Volume# Mute PANEL_ID# DIM# PPWR_ON# INV_ON# R414 4K7 1/16W Volume# Mute PANEL_ID# DIM# PPWR_ON# INV_ON# 1K 1/16W 1K 1/16W {2} {2} {2} {2} {6} {2} R451 R413 4K7 1/16W + R454 R453 R412 4K7 1/16W R411 4K7 1/16W MCU_VCC_S VCC3 DSUB_V {3} CRY STAR_OUT {5} MVCC DSUB_CONNECT {3} R431 POWER_KEY # {2} KEY 1 {2} KEY 0 {2} 6K8 1/16W RTD2122L-LF 6K8 1/16W R416 10K 1/16W C403 0.1uF/16V 24mhz X401 1 Closed to X'tal C401 10pF R437 R401 R438 3.9K OHM +-1% 1/16W 3.9K OHM +-1% 1/16W 3.9K OHM +-1% 1/16W MCU_VCC 2 C410 0.1uF/16V R436 10K 1/16W R439 6K8 1/16W C411 10pF Closed to MCU OEM MODEL BenQ G922HDAL Size B 絬 隔 瓜 絪 腹 G2498-2A-AO-X-16-091216 TPV MODEL T89ARPMCFWBQNN Rev 1.0 Key Component 5.MCU/RTD2122 PCB NAME 715G2498-2A-AO 称爹 <称爹> T P V ( Top Date 38 Victory Electronics Co . , Thursday , December 17, 2009 Ltd. ) Sheet 5 of 7 BenQ G925HDA {3} {3} {3} {3} DGND 37 TXO0+ 39 R1.8DVCC 40 38 TXO0- PGND SDA VCCK {4} RTD_SCLK RTD_SD3/SDI 41 42 SCL DDCSCL/PWM0 DDCSDA/PWM1/IRQ 43 RTD_SCLK CRYSTAR_OUT 44 46 45 XIN 47 VCLK/RX2P TMDS_VDD TXE1- 15 16 17 18 RTD_R+ R1.8DVCC BJT_B RTD_GRTD_G+ RTD_RRTD_R+ TXE1+ 36 35 34 33 32 RXOC- 31 RXOC+ RXOCRXOC+ 30 29 28 RXE0- 27 RXE0+ 26 RXE1- 25 RXE1+ TXE224 B+ RXE2- 12 TXE0+ B- TXE2+ RTD_B+ ADC_GND TXE3- 11 TXE0- 23 {3} RTD_B+ RTD_B- TXO3+ AHS 22 {3} RTD_B- 10 RTD2035L AVS RXE2+ DGND TXO3- RXE3- 9 TXOC+ V7/RXCN TXE3+ RTD_H V6/RXCP PGND 8 TXOC- 21 {3} RTD_H RTD_V V5/RX0N RXE3+ {3} RTD_V TXO2+ VCCK 7 TXO2- V4/RX0P 20 6 V3/RX1N DGND 5 TXO1- 19 DGND U501 TXO1+ R1.8DVCC 4 V2/RX1P BJT_B 3 V1/REXT ADC_VDD 2 0.1uF/16V 0.1uF/16V 0.1uF/16V R+ C501 C506 RTD_R- 22UF50V C507 + R- 1 FB503 120 C505 G- MMBT2907AK G+ Q502 14 3.3 2 W 13 R507 RTD_G- VCC3 R1.8DVCC Q501 MMBT2907AK RTD_G+ 1.8AVCC V0/RX2N 48 BJT_B TMDS_VDD C503 0.1uF/16V RTD_SD3/SDI CRYSTAR_OUT VCC3 FB502 120 {4} {4} 18.5″ LCD Color Monitor LVDS_E0 LVDS_E1 LVDS_E2 LVDS_E3 RXE0RXE0+ RXE1RXE1+ LVDS_E4 LVDS_E5 LVDS_E6 LVDS_E7 LVDS_E8 LVDS_E9 RXE2RXE2+ RXECRXEC+ RXE3RXE3+ LVDS_E[0..9] R1.8DVCC OEM MODEL BenQ G920HDAL Size B 絬 隔 瓜 絪 腹 G2498-2A-AO-X-16-091216 TPV MODEL T89ARPMCFWBQNN Rev 1.0 Key Component 6.RTD2035L PCB NAME 715G2498-2A-AO 称爹 <称爹> T P V ( Top Date 39 Victory Electronics Co . , Wednesday , December 16, 2009 Ltd. ) Sheet 6 of 7 {6} 18.5″ LCD Color Monitor BenQ G925HDA LVDS Panel ( Normal Type ) CN601 RXE0RXE1RXE2RXECRXE3{6} 1 3 5 7 9 11 13 LVDS_E[0..9] LVDS_E0 LVDS_E1 LVDS_E2 LVDS_E3 RXE0RXE0+ RXE1RXE1+ LVDS_E4 LVDS_E5 LVDS_E6 LVDS_E7 LVDS_E8 LVDS_E9 RXE2RXE2+ RXECRXEC+ RXE3RXE3+ 2 4 6 8 10 12 14 RXE0+ RXE1+ RXE2+ RXEC+ RXE3+ PANEL_VCC CONN R602 330R 1/8W R606 NC(R0805) C602 0.01uF/25V 3D CMVCC 1 G R603 NC R605 4K7 1/16W AO3401L R601 C603 10K 1/16W 2 S PANEL_VCC 0.1uF/16V R604 PANEL_VCC Q601 AO3401 2006-11-7 Add pull up 4K7 to MVCC 47K1/16W {4} PPWR_ON# PPWR_ON# FB601 Q602 PMBS3906 120 + T P V ( Top 絬 隔 瓜 絪 腹 Key Component Date Victory Electronics Co . , G2498-2A-AO-X-16-091216 7.OUTPUT Thursday , December 17, 2009 40 Ltd. ) C604 47UF25V OEM MODEL BenQ G920HDAL Size A TPV MODEL T89ARPMCFWBQNN Rev 1.0 PCB NAME 715G2498-2A-AO 称爹 <称爹> Sheet 7 of 7 18.5″ LCD Color Monitor BenQ G925HDA Power Board R918 100 OHM 1/4W L904 R920 + + 100 OHM 1/4W 3 4 9 10 5 7 8 4 R904 10K OHM 1/4W C907 100uF450V R932 10K OHM 1/4W C901 1000pF C906 1500pF2KV D907 100KOHM +-5% 2WS NC D900 FR107 R906 NC 11 12 6 2 R921NC C921 + R939 1K 1/8W 0.001uF F902 + NC C939 NC R948 NC POWER X'FMR NC Q904 31DQ06FC3 R952 NC NC F903 D903 LL4148 ! R961 100 OHM 1/4W IC901 ! RT HV COMPNC CS VCC GND OUT 8 7 6 5 R910 10R 1/4W 2 4 1 2 3 4 ZD905 RLZ18B LD7575A PS +5V 1.0uH NC R962 100 OHM 1/4W C929 0.001uF Q901 2SK2645-54MR R938 + C940 1000UF25V R924 ZD921 RLZ13B ZD922 RLZ5.1B 10K 1/8W R940 33K 1/10W R927 3.6K OHM 1% 1/10W C909 470pF/25V ! IC902 PC123X2Y FZOF 3 ! R914 0.47 OHM +-5% 2WS D916 LL4148 R925 1K 1/8W D915 LL4148 2 R902 4 220 OHM 1/4W 1 R912 0.22UF 680K OHM 1/4W F905 0 OHM 1/4W 1 R915 100K OHM 1% 1/8W + C915 470uF/16V 150R 1/8W R935 100 OHM 1/4W 1 C908 L903 ! 2 3 R907 NC 30mH +5V1 NC F904 R947 NC R923NC R909 5.1 OHM 1/4W D901 FR103 C903 22uF/50V C910 NC D905 2 C932 ZD923 NC R922NC + 1 L905 NC 1 ! Q903 PMBS3904 D906 FCH10U10 R908 R905 NC C911 0.1uF L901 0.1uF R943 470R 1/8W 3 1 C902 1000pF C930 1 NC ! R946 150 OHM 2W C922 470PF50V ZD902 RLZ13B C918 680uF/25V C938 0.22UF ! + 2 + ! C904 + C917 680uF/25V 1 - BD901 KBP208G !T901 2 2 +12V 2 1.0uH 2 ! 100 OHM 1/4WC912 0.001uF 1 1 R919 R901 R900 ! 680K OHM 1/4W 680K OHM 1/4W C924 0.1uF C928 0.01uF C900 3300pF 250V GND1 GND ! VAR901 Varistor 1 2 IC903 AZ431AZ-AE1 R942 1K 1/10W 1% R926 1K 1/10W 1% R930 2.43K OHM 1% 1/10W C925 NC CN902 N.C HS2 HEAT SINK(D906_Q90G6263-6) NR901 NTCR ! ! t ! C931 0.1uF HS5 SHIELD(H85G0002-1) HS3 HEAT SINK(Q901_Q90G6263-6) 3 MUTE +5V DIM ON/OFF 1 2 F901 FUSE 2 VOL 1 2 3 4 5 6 7 8 9 10 1 2 CONN 1 2 1 CN901 SOCKET 87G 501 32 S OEM MODEL Size 絬 隔 瓜 絪 腹 G2852-A-4-X-5-081126 TPV MODEL Rev Key Component PCB NAME T P V ( Top ! Date 41 Victory Electronics Co . , 1.POWER Wednesday , Nov ember 26, 2008 Ltd. ) Sheet 715G2852 3 4 1 of 2 称爹 Custom A 18.5″ LCD Color Monitor BenQ G925HDA 1 2 C839 1500PF/50V 6 T801 POWER X'FMR 7 F801 R804 100R 1/8W C802 470PF50V Q801 PMBS3904 C824 0.1uF Q802 AM9945N-T1-PF 1 8 S D + D810 NC Q808 PDTA144WK 2 3 R839 22R 1/8W Q804 PMBS3906 1 2 3 4 G D S D G D 7 R856 15R 1/4W 1 8 R801 1K5 1/10W 1% C803 30pF/3KV C838 1500PF/50V 1 2 5 R822 1K 1/8W R828 10K 1/10W 1% CONN CN802 2 D807 LL4148 Q811 PMBS3904 DIM D801 BAV99 6 3 C825 0.1uF/25V 2 ON/OFF C807 0.1uF/25V C819 0.0022uF CONN CN801 1 0 OHM 1/4W Q805 PDTC144WK C801 30pF/3KV 3 4 +12V R821 1K 1/8W R817 10K 1/10W 1% D805 LL4148 R855 15R 1/4W 3 C823 0.0022uF 1 R814 1K5 1/10W 1% D811 NC 2 R850 22R 1/8W 3 Q812 PMBS3906 1 D802 BAV99 R827 1K 1/10W 1% Q806 PMBS3904 R853 68K 1/10W C835 NC D817 LL4148 R841 68K OHM 1% 1/10W R851 6K8 1/10W C842 0.01uF R802 8.2K 1/10W 1% R829 22R 1/8W R825 22R 1/8W R837 47K 1/8W R830 NC C822 1uF/25V R832 10K 1/10W 1% IC801 1 2 3 4 5 6 7 8 D812 LL4148 R823 0R05 1/10W 5% R807 10K 1/10W 1% TL494IDR 1IN+ 2IN+ 1IN2INFEEDBACK REF DTC OUTPUT CTRL CT VCC RT C2 GND E2 C1 E1 16 15 14 13 12 11 10 9 D806 LL4148 R818 1K 1/10W 1% Q809 RK7002 C821 0.1uF/25V R810 51K OHM 1% 1/8W R865 R861 NC C846 NC R864 NC R854 NC NC R820 10K 1/10W 1% Q807 N.C R863 10K 1/10W 1% R831 1K 1/8W R826 1K 1/8W C820 220pF50V R824 C834 0.1uF/25V R803 680K 1/10W R808 10K 1/10W 1% R835 1M 1/10W 5% 1K 1/10W 1% C817 NC C845 2.2uF/16V R862 1M 1/10W 5% D814 LL4148 T P V ( Top Electronics Co . , Ltd. ) OEM MODEL G2852-A-4-X-5-081126 TPV MODEL 2.INVERTER PCB NAME Date 42 Victory 絬 隔 瓜 絪 腹 Key Component Wednesday , Nov ember 26, 2008 Sheet Size Rev 715G2852-3-4 2 of 2 称爹 Custom A ODM MODEL 18.5″ LCD Color Monitor BenQ G925HDA Key Board LED_RED# 3 1 LED_GRN# LED001 LED 2 CN001 LBADC1 LBADC2 DC_POWERON LED_GRN# LED_RED# C001 C002 C003 C004 C005 NC/0.001uF NC/0.001uF NC/0.001uF NC/0.001uF NC/0.001uF Wire Harness R003 R002 1K 1/10W 1% 3K 1 / 1 0 W R006 R007 1K 1/10W 1% 3K 1 / 1 0 W R004 R005 1K 1/10W 1% 3K 1 / 1 0 W 3 4 GND GND 3 4 GND GND GND AUTO ZD001 C006 ZD004 C008 ZD003 5 SW002 1 2 5 SW001 3 4 NC GND 5 SW003 SW001 2 0.1uF GND C010 C009 MENU LEFT RIGHT 4 1 2 NC GND ZD005 ZD002 GND 3 1 0.1uF GND 4 5 SW004 NC GND 3 SW002 SW003 2 NC 4 5 SW005 0.1uF 3 1 2 NC 5 SW006 C007 1 0.1uF C011 0.1uF ZD006 SW004 SW005 2 0.1uF SW006 1 ENTER POWER GND NC 1 2 3 4 5 6 GND T P V ( Top 絬 隔 瓜 絪 腹 Victory Electronics Co . , G3367-C-X-X-1-081013 Key Component Date 43 02.KEY BOARD Wednesday , December 03, 2008 Ltd. ) OEM MODEL Size TPV MODEL Rev PCB NAME Sheet 715G3367-C 2 of 2 称爹 B C <称爹> 18.5″ LCD Color Monitor BenQ G925HDA Troubleshooting Frequently asked questions (FAQ) The image is blurred: Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions. How do you use a VGA extension cable? Remove the extension cable for the test. Is the image now in focus? If not, optimize the image by working through the instructions in the "Adjusting the refresh rate" section on the link "Adjusting the Screen Resolution". It is normal for blurring to occur due to conduction losses in extension cables. You can minimize these losses by using an extension cable with better conduction quality or with a built-in booster. Does the blurring only occur at resolutions lower than the native (maximum) resolution? Read the instructions on the link "Adjusting the Screen Resolution" on the CD. Select the native resolution. Pixel errors can be seen: One of several pixels is permanently black, one or more pixels are permanently white, one or more pixels are permanently red, green, blue or another color. • Clean the LCD screen. • Cycle power on-off. • These pixels are permanently on or off and that is a natural defect occurs in LCD technology. The image has a faulty coloration: It has a yellow, blue or pink appearance. Select MENU > PICTURE > Color > Reset Color, and then choose “YES” in the “Caution” message box to reset the color settings to the factory defaults. If the image is still not correct and the OSD also has faulty coloration, this means one of the three primary colors is missing in the signal input. Now check the signal cable connectors. If any pin is bent or broken off, please contact your dealer to get necessary support. No image can be seen: Is the prompt on the display illuminated in green? If the LED is illuminated in green and there is a message “Out of Range” on the screen, this means you are using a display mode that this monitor does not support, please change the setting to one of the supported mode. Please read the “Preset display modes” section from the link "Adjusting the Screen Resolution". Faint shadow from the static image displayed is visible on the screen: • Activate the power management function to let your computer and monitor go into a low power "sleep" mode when not actively in use. • Use a screensaver to prevent the occurrence of image retention. 44 18.5″ LCD Color Monitor BenQ G925HDA Is the prompt on the display illuminated in orange? If the LED is illuminated in orange, the power management mode is active. Press any button on the computer keyboard or move the mouse. If that does not help, check the signal cable connectors. If any pin is bent or broken off, please contact your dealer to get necessary support. Is the prompt on the display not illuminated at all? Check the power supply mains socket, the external power supply and the mains switch. The image is distorted, flashes or flickers: Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions. You are running the monitor at its native resolution, but the image is still distorted. Images from different input sources may appear distorted or stretched on the monitor running at its native resolution. To have the optimal display performance of each type of input sources, you can use the "Display Mode" function to set a proper aspect ratio for the input sources. The image is displaced in one direction: Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions. The OSD controls are inaccessible: • To unlock the OSD controls when the OSD is preset to be locked, press and hold the “MENU” key for 15 seconds to enter the “OSD Lock” option and make changes. • Alternatively, you may use or keys to select “NO” in the “OSD Lock” submenu from the “OSD Settings” menu (under SYSTEM), and all OSD controls will be accessible. If your problems remain after checking this manual, please contact your place of purchase or e-mail us at: [email protected] 45 18.5″ LCD Color Monitor BenQ G925HDA No Power No power NG Check power cable is tightened? Re-plug the power cable OK NG Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? OK NG Check the LED Check the AC power indicates is OK? OK Replace the converter board NG Replace main board and check connections NG Replace key board and check connections 46 18.5″ LCD Color Monitor BenQ G925HDA No Video (Power LED Green) No Video (Power LED Green) NG Press the power Replace the main board button is OK? OK OK Replace the converter The end board NG OK Replace the main The end board and connection NG OK Check the LVDS/FFC Replace the LVDS/FFC cable or panel cable or panel NG Replace the key board 47 18.5″ LCD Color Monitor BenQ G925HDA DIM DIM (image overlap, focus or flicker) OK Reset in factory mode The end NG OK Set to the optimal frequency, select the recommended frequency The end NG OK Readjust the phase and pixel The end clock in the user mode NG OK Pull out signal cable and check “Self Test Feature Check” is ok? Check the signal cable and the PC NG NG OK Replace the main board The end NG Replace the panel OK 48 18.5″ LCD Color Monitor BenQ G925HDA Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable NG OK In the user mode, set the” color NG The end settings” until customer satisfy Pull out the signal cable and check the screen color display is normal? NG OK NG Replace the signal cable or PC Replace the main board 49 18.5″ LCD Color Monitor BenQ G925HDA PCB LAYOUT Main Board 50 18.5″ LCD Color Monitor BenQ G925HDA 51 18.5″ LCD Color Monitor BenQ G925HDA 52 18.5″ LCD Color Monitor BenQ G925HDA Power Board 53 18.5″ LCD Color Monitor BenQ G925HDA 54 18.5″ LCD Color Monitor BenQ G925HDA 55 18.5″ LCD Color Monitor BenQ G925HDA Key Board 56 18.5″ LCD Color Monitor Appendix 1 – Screw List / Torque BenQ G925HDA (T8AARPD8FWBUNN) Part No. Type Description Quantity Torque 0M1G 130 6120 M3*6 PANEL& MAINFRAME 3 3 ± 0.5kgf.cm 0M1G1030 6120 M3*6 PCB & MAINFRAME 4 6 ± 1kgf.cm AQ1G1740 12120 Q4*12 HINGE & STAND 2 12 ± 2kgf.cm 0M1G1740 8 47 CR3 M4*8 HINGE & STAND 1 6 ± 1kgf.cm AM1G1740 12 47 CR3 M4*12 HINGE & STAND&MAINFRAME 2 6± 1kgf.cm 57