23” LCD Color Monitor BenQ G2320HDB Abbreviations & Acronyms Analog to Digital Converter Automatic Frequency Control: control signal used to tune to the correct frequency BenQ BenQ Corporation BTSC Broadcast Television System Committee Central Process Unit CVBS Composite Video Blanking and Synchronization Digital Light Processing / Texas Instruments®...
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23” LCD Color Monitor BenQ G2320HDB Not Connected Non Volatile Memory: IC containing TV related data (for example, options) On Screen Display Personal Computer Printed Circuit Board (or PWB) Remote Control transmitter Red, Green and Blue. The primary color signals for TV. By mixing levels of R, G...
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”.
23” LCD Color Monitor BenQ G2320HDB 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.
23” LCD Color Monitor BenQ G2320HDB 3. General Description This new LCD (Liquid Crystal Display) monitor BenQ G2320HDB offers numerous features and functions, for example: ● TFT display (Thin Film Transistor; active matrix) ● minimal space requirements thanks to slim casing ●...
23” LCD Color Monitor BenQ G2320HDB 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...
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23” LCD Color Monitor BenQ G2320HDB Audio line in Earphone Jack Voltage Rating AC: 100~240V (Built-in) Power-On Mode Power Supply Standby Mode <1W Power Off Mode <0.5W Chassis Colors Black Carton Brown Carton with at least C flute Power LED...
23” LCD Color Monitor BenQ G2320HDB 5.2 Packing When packing the monitor into the carton, please follow the pictures as below. Using the EPE bag to pack the monitor without base Using the EPS to pack the monitor...
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23” LCD Color Monitor BenQ G2320HDB D-SUB cable Base Putting the base, user manual and D-SUB cable in the position as the picture shows above User manual Power cord Putting the monitor and accessories into the carton...
23” LCD Color Monitor BenQ G2320HDB 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.
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23” LCD Color Monitor BenQ G2320HDB 4. The process of ISP write is as follows. a. Double-click ,running the program as follows: b. Choose , click , running the program as follows:...
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23” LCD Color Monitor BenQ G2320HDB c. Click icon, search the program” BenQ_G2320HDB_2555LH_SEC.H00”, and click open: d. Click icon, search the program” BenQ_G2320HDB_2555LH_SEC.H01”, and click open: e. Click icon, search the program” BenQ_G2320HDB_2555LH_SEC_EXTEND”, and click open: f. Click icon, until appear the follow Fig, writer completed...
23” LCD Color Monitor BenQ G2320HDB DDC Instruction General DDC Data Re-programming In case the main EEPROM with Software DDC which store all factory settings were replaced for a defect, repaired monitor’ the serial numbers have to be re-programmed. It is advised to re- soldered the main EEPROM with Software DDC from the old board onto the new board if circuit board have been replaced, in this case the DDC data does not need to be re-programmed.
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23” LCD Color Monitor BenQ G2320HDB 3 The process of ISP write is as follow: a. Double-click ,appear as follow: b. Choose “Analog” and then click “Loadfile\lcdddc\B\BENQ\23BNQ\G2320HDB”, it will show the picture as follow: (Note: When you write digital EDID, choose the “DVI”)
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23” LCD Color Monitor BenQ G2320HDB c. Click “OK”, it will show the picture as follow. d. Input the date in “Year-Month-Day” box, Key in the same 13 numbers in the Input SN and Verify SN, then click “Program”, when the analog DDC Write complete, it will show the picture as follow: Note: The way of digital DDC Write is the same as analog.
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23” LCD Color Monitor BenQ G2320HDB Separate Sync Support: Composite Sync Support: Yes Sync. on green video supported:Yes Serration of the Vsync.Pulse is not required. Max. H. Image Size : 51cm. Max. V. Image Size : 29cm. Display Gamma: DPMS Features, Stand-by: No.
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Detailed Timing: FD (Monitor limits) Min. V. rate: 50Hz Max. V. rate: 76Hz Min. H. rate: 24KHz Max. H. rate: 83KHz Max. Pixel Clock: 210MHz Detailed Timing: FC (Monitor Name) 'BENQ G2320HDB Detailed Timing: FF (Monitor SN) '15467890321' <-x-Detailed Timing Descriptions-x-> Extension Flag: Checksum:...
23” LCD Color Monitor BenQ G2320HDB Adjustment / Alignment Procedure Adjusting the Picture 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.
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23” LCD Color Monitor BenQ G2320HDB 1. Press the MENU key to display the main menu. 2. Press the keys to select DISPLAY and then press the ENTER key to enter the menu. 3. Press the keys to move the highlight to a menu item and then press the ENTER key to select that item.
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23” LCD Color Monitor BenQ G2320HDB Item Function Operation Range Adjusts the balance between light Press the key to increase and dark shades. the brightness and press the Brightness decrease 0 to 100 The function is not available for brightness.
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23” LCD Color Monitor BenQ G2320HDB Resets the User Mode custom Reset Color Press the keys to color settings to the factory change the settings. defaults. Press MENU to leave the Color menu. Dynamic The function will increase the level...
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23” LCD Color Monitor BenQ G2320HDB • sRGB - for better color matching representation with the peripheral devices, such as printers, DSCs, etc. Displays the preview of screen images under Senseye Demo the selected mode from Press the (available when the Picture Mode.
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23” LCD Color Monitor BenQ G2320HDB Item Function Operation Range Selects the D-sub (analog) input. Use this to change the input to that appropriate to your video Press the keys to change Input • D-sub cable connection type. the settings.
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23” LCD Color Monitor BenQ G2320HDB Press the keys to change the settings. To unlock the OSD controls when the OSD is preset to be locked, press and hold Prevents all the monitor settings the "MENU" key for 15 from being accidentally changed.
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23” LCD Color Monitor BenQ G2320HDB Display timing table Pixel Format Horz-f(kHz) Horz -p Vert-f (Hz) Vert -P Pixel Clk (MHz) Source 640 x 480 31.47 59.94 25.175 640 x 480 37.50 75.00 31.500 720 x 400 31.47 70.08 28.321 800 x 600 37.88...
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Mode 1: To enable the hot plug pin detection. (HDMI port default) Mode 2: To disable the hot plug pin detection. (DVI port default) 8. Add BenQ logo on/off item, the default is “on” 9. add the auto power on item, the default is “off ”...
23” LCD Color Monitor BenQ G2320HDB Product Disassembly 1). Remove the stand-base ASS’Y 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 two screws as below to remove the stand-base ASS’Y.
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23” LCD Color Monitor BenQ G2320HDB 3). Remove the rear cover 4).Remove the Panel Disconnect the Lamp Connections and LVDS Cable connection.
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23” LCD Color Monitor BenQ G2320HDB 5).Remove the Main Board and Power Board Remove the screws and disconnect the all connections, at last you can get the Main Board and Power Board as follow.
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23” LCD Color Monitor BenQ G2320HDB MAIN BOARD POWER BOARD...
23” LCD Color Monitor BenQ G2320HDB Troubleshooting Guide Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with and Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. 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.
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23” LCD Color Monitor BenQ G2320HDB 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.
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23” LCD Color Monitor BenQ G2320HDB Main Board (1) No Power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section...
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23” LCD Color Monitor BenQ G2320HDB (2) No picture No picture Check if the Pin 3, 4 of CN201 is 5V input Check power board Measure U201 Pin2=3.3V Replace U201 X401 oscillate waveforms are normal Replace X401 Check U401 Replace U401...
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23” LCD Color Monitor BenQ G2320HDB (3) White screen White Screen Measure Q601 base X401 oscillate is low level? waveform is normal Replace X401 Check Q602, Q601 is broken Check U401 or CN601 solder? Replace U401 Check Correspondent Check reset circuit of component.
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23” LCD Color Monitor BenQ G2320HDB Power Board No power Check CN902 PIN3, 4 = 5V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901...
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23” LCD Color Monitor BenQ G2320HDB W / LED, No Backlight Check Inverter input =16V Check adapter and ZD802, ZD803 Check ON/OFF signal Check Interface board or main board Check IC801 PIN 11=5V Change ON/OFF circuit Check IC801 PIN8/PIN9 PWM wave...
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23” LCD Color Monitor BenQ G2320HDB Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Is Key Pad Board normally? Replace Key Pad Board...
23” LCD Color Monitor BenQ G2320HDB Appendix 1 – Screw List / Torque TD9SRNMYFWBGHN Part No. Type Description Quantity Torque 0G1G1030 8120 M3*8 FOR PB & MAIN FRAME 6±1KGF.CM 0M1G1030 6120 M3*6 FOR MB & MAIN FRAME 6±1KGF.CM AQ1G1740 12120 M4*12 FOR HINGE &...
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