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.
18.5″ LCD Color Monitor BenQ G925HDA Content Index 1. About this Manual ................................................................................................................................................... 5 1.1 Important ............................................................................................................................................................ 5 1.2 Trademark .....................................................................................................
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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.
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.
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.
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.
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.
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.
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.
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.
18.5″ LCD Color Monitor BenQ G925HDA 3. Putting the user manual and power cord in the position as the picture shows below.
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.
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.
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.
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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.
.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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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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.
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18.5″ LCD Color Monitor 4) BenQ G925HDA Remove the key board from the bezel. 5) Remove the main frame from the panel.
18.5″ LCD Color Monitor BenQ G925HDA 6) Remove the boards from the main frame.
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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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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.
