BenQ G2320HD Service Manual Download Page 5

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23” LCD Color Monitor

BenQ G2320HD

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

Summary of Contents for G2320HD

Page 1: ...n 1st Date 04 28 2009 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...

Page 2: ...atement 6 3 General Description 7 4 Related service information 8 5 Product Overview 8 5 1 Monitor Specifications 8 5 2 Packing 10 Level 1 Cosmetic Appearance Alignment Service 12 Visual Inspection Cl...

Page 3: ...Light Processing Texas Instruments DMD Digital Micromirror Device DRAM Dynamic RAM DVI Digital Video Interface DVI I Digital Video Interface Integrated E EEPROM Electrically Erasable and Programmable...

Page 4: ...lue The primary color signals for TV By mixing levels of R G and B all colors Y C are ROM Read Only Memory S SDA Data signal on I2 C bus SDRAM Synchronous DRAM SW Sub Woofer Software T THD Total Harmo...

Page 5: ...otection 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...

Page 6: ...onfirming the RoHS requirement before replace them 2 2 Safety Notice 1 Make sure your working environment is dry and clean and meets all government safety requirements 2 Ensure that other persons are...

Page 7: ...ibility plug play capability power management for reducing power consumption when the computer is not in use compliance with the recommendations in accordance with TCO 03 This operating manual contain...

Page 8: ...y Area 509 76x286 742 Native Resolution 1920x1080 Pixel Pitch 0 265 Brightness Typ 300 nits Contrast Ratio Typ DCR Min 1000 1 Panel 40000 1 DCR Viewing Angle H V CR 10 160 160 Display Colors 16 7M 6bi...

Page 9: ...ndby Tilt Up Down 20 5 VESA Wall Mount 100 x 100mm Kensington Lock Yes Container Loading 40 TBD Container Loading 20 TBD Multi language Support OSD 17 Languages English Francais Deutsch Italiano Espan...

Page 10: ...D Color Monitor BenQ G2320HD 10 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 mo...

Page 11: ...olor Monitor BenQ G2320HD 11 Putting the base user manual and D SUB cable in the position as the picture shows above Putting the monitor and accessories into the carton User manual Power cord Base D S...

Page 12: ...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 1 When...

Page 13: ...23 LCD Color Monitor BenQ G2320HD 13...

Page 14: ...23 LCD Color Monitor BenQ G2320HD 14...

Page 15: ...nQ G2320HD 15 4 Connect the ISP board as follow 5 The process of ISP write is as follows a Double click running the program as follows b Click and the program runs as follows Connect to the PC LPT Con...

Page 16: ...23 LCD Color Monitor BenQ G2320HD 16 c Click OK and the program runs as follows d Click icon and the program runs as follows...

Page 17: ...23 LCD Color Monitor BenQ G2320HD 17 e Click icon search the correct program and click open f Click icon If it burns successfully it will show as the follow picture...

Page 18: ...nel may be obtained from Video Electronics Standards Association VESA Extended Display Identification Data EDID information may be also obtained from VESA 1 An i486 or above personal computer or compa...

Page 19: ...0HD 19 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 wri...

Page 20: ...he 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 f...

Page 21: ...0 00 00 00 FC 00 42 60 45 4E 51 20 47 32 33 32 30 48 44 0A 00 00 00 FF 70 00 32 34 35 36 38 37 39 30 32 33 31 0A 20 00 E0 Decoded EDID data Header Header 00 FF FF FF FF FF FF 00 x Header x Vendor Prod...

Page 22: ...e In First Detailed Timing GTF supported No Basic Display Parameters Features Color Characteristics Red x 0 6396484375 Red y 0 3300781250 Green x 0 3017578125 Green y 0 5996093750 Blue x 0 1503906250...

Page 23: ...dentification x Detailed Timing Descriptions Detailed Timing 1920x1080 60Hz x Detailed Timing Descriptions x Detailed Timing Descriptions Detailed Timing FD Monitor limits Min V rate 50Hz Max V rate 7...

Page 24: ...20 00 00 00 FC 00 42 60 45 4E 51 20 47 32 33 32 30 48 44 0A 00 00 00 FF 70 00 31 35 36 34 38 37 39 30 31 32 33 0A 20 00 99 Decoded EDID data Header Header 00 FF FF FF FF FF FF 00 x Header x Vendor Pr...

Page 25: ...7578125 Green y 0 5996093750 Blue x 0 1503906250 Blue y 0 0595703125 White x 0 3125000000 White y 0 3291015625 x Color Characteristics x Established Timings Established Timings 1 A5 720x400 70Hz VGA I...

Page 26: ...Timing 1920x1080 60Hz x Detailed Timing Descriptions x Detailed Timing Descriptions Detailed Timing FD Monitor limits Min V rate 50Hz Max V rate 76Hz Min H rate 24KHz Max H rate 83KHz Max Pixel Clock...

Page 27: ...1F 23 09 07 07 83 01 00 00 67 03 0C 00 10 00 38 20 2D 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 E0 0E 11 30 00 00 18 01 1D 00 72 51 D0 1E 20 6E 28 55 00 E0 40 0E 11 00 00 1E 01 1D 00 BC 52 D0 1E 20 B8 28 5...

Page 28: ...75Hz VESA 1280 x1024 75Hz VESA Established Timings 3 80 1152 x 870 75Hz Apple Mac II Standard Timing Identification 1024 x 576 60Hz 1280 x 720 60Hz 1280 x 960 60Hz 1280 x 1024 60Hz 1440 x 900 60Hz 16...

Page 29: ...480 P 59 94 60Hz 16 9 720 x 576 P 50Hz 16 9 720 1440 x 480 I 59 94 60Hz 16 9 720 1440 x 576 I 50Hz 16 9 640 x 480 P 59 94 60Hz 4 3 1920 x 1080 I 50Hz 16 9 720 1440 x 576 I 50Hz 4 3 1920 x 1080 P 50Hz...

Page 30: ...criptions 1280x720 50Hz H Image Size 480 mm V Image Size 270 mm Pixel Clock 74 Hz Refreshed Mode Non Interlaced Detailed Timing Descriptions 720x576 50Hz H Image Size 480 mm V Image Size 270 mm Pixel...

Page 31: ...he settings on your monitor Press the MENU key to display the following main OSD menu There are four main OSD menus 1 Display 2 Picture 3 Picture Advanced 4 System Use the or keys to highlight a menu...

Page 32: ...e ENTER key to select this option and make adjustment H Position Adjusts the horizontal position of the screen image Press the or keys to adjust the value 0 to 100 V Position Adjusts the vertical posi...

Page 33: ...enu Normal Allows video and still photographs to be viewed with natural coloring This is the factory default color Press the or keys to select this option 0 to 100 Bluish Applies a cool tint to the im...

Page 34: ...s 0 to 5 Picture Advanced menu 1 Press the MENU key to display the main menu 2 Press the or keys to select PICTURE ADVANCED and then press the ENTER key to enter the menu 3 Press the or keys to move t...

Page 35: ...allow aspect ratio s other than 16 9 to be displayed without geometric distortion Full Scales the input image to fill the screen Ideal for 16 9 aspect images Aspect The input image is displayed witho...

Page 36: ...or keys to change the settings The language options displayed on your OSD may differ from those shown on the right depending on the product supplied in your region English French German Italian Spanis...

Page 37: ...ll OSD controls will be accessible YES NO Press MENU to leave the OSD Settings menu DDC CI Allows the monitor settings to be set through the software on the PC Press the ENTER key to select this optio...

Page 38: ...5 00 832x624 49 72 74 55 1024x768 48 36 60 00 1024x768 60 02 75 03 1152x864 67 50 75 00 1152x870 68 68 75 06 1152x900 61 80 65 96 1280x768 47 396 60 00 1280x800 49 702 59 81 1280x720 44 77 59 86 1280x...

Page 39: ...e timer can only reset at the service mode by Timer Reset And need to have a warning message to double confirm the reset function The timer should record up to 99999 hours 7 Add one select item for DV...

Page 40: ...0ADPB1B0130 1 PCS BEZEL 23 2 Q33G0288 2 1C0100 1 PCS LENS 3 KEPC8QJ3 1 PCS KEY BOARD 4 Q33G0287ADP 1L0100 1 PCS KEY PAD 5 750GLS230HT132N000 1 PCS PANEL 6 0G1G1030 8120 4 PCS SCREW PB MF MB MF 7 PWPC9...

Page 41: ...REAR COVER 23 15 A33G0468ADPB1L0100 1 PCS PLATE_LOGO_B 16 AQ1G1740 12120 2 PCS SCREW STAND HINGE 17 A37G0117011 1 PCS HINGE_BENQ_G2320 18 A34G1312ADP 1B0100 1 PCS STAND FRONT 19 AM1G1740 12 47 CR3 4 P...

Page 42: ...oth 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 Fig1 2 Remove the Bezel Remove the bezel as fo...

Page 43: ...23 LCD Color Monitor BenQ G2320HD 43 C Put the disassembly tool into the nick...

Page 44: ...23 LCD Color Monitor BenQ G2320HD 44 D Gash slightly the latch with the disassembly tool...

Page 45: ...23 LCD Color Monitor BenQ G2320HD 45 E When the all latches open remove the bezel 3 Disconnect the key board connections...

Page 46: ...23 LCD Color Monitor BenQ G2320HD 46 4 Remove the rear cover 5 Remove the Panel Disconnect the Lamp Connections and LVDS Cable connection...

Page 47: ...23 LCD Color Monitor BenQ G2320HD 47 6 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...

Page 48: ...23 LCD Color Monitor BenQ G2320HD 48 MAIN BOARD POWER BOARD...

Page 49: ...20HD 49 Block Diagram Main Board D Sub Connector CN301 H sync V sync RGB Panel Interface CN601 Key Control Interface CN202 Crystal 24MHZ X401 Scalar RTD2545LH GR U501 MCU RTD2122L LF U401 DVI Connecto...

Page 50: ...r Start Resistor R904 R905 PWM Control IC901 Transformer AC input 16V Feedback Circuit Transformer PT801 MOSFET Q805 Q806 Lamp 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes Output C...

Page 51: ...3shield DAT3 DAT3 5V SYNC GND HPD DAT0 DAT0 0 5shield DAT5 DAT5 clk shield clk clk GND GND R150 10R 1 16W 5 HDMI1_D0 4 D102_D R456 10K 1 16W 5 5V_VCC SCL_VGA HDMI_HOTPLUG D_SUBG C117 0 1uF 16V GREEN...

Page 52: ...3 PA6 Q403_E R429 10K 1 16W 5 R428 10K 1 16W 5 RSTB R446 NC 10K 1 16W 5 C417 10UF16V R452 0R05 1 16W 5V R450 NC 2K2 1 16W 5 AUDIO_VDD PB0 PA2 HDMI1_CEC 3 RX C425 100uF16V HDMI_HPD 3 RX PA 0 9 5 RIN 3...

Page 53: ...RXO2 RXE2 PA4 PA2 R435 220 OHM 1 4W RXO3 CN403 CONN 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 RXO2 PB8 PB4 PB0 PA1 RXE2 RXO2 PA6 RXO0 RXE1 RXO0 RXE3 RXOC PA5 PA2...

Page 54: ...7 Friday March 20 2009 715G3502 C 5 0 AUDIO G3502 C X X 3 090317 HD9SNQN8FWBQDN OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component U602 NC LM358D 1...

Page 55: ...AZ1117S 5 0TRE1 1 2 3 VSS VOUT VIN Q705_C R706 2 2 OHM 2W 5V VCC3 3 Q705_B U703 NC AZ1117D 1 2TRE1 1 2 3 ADJ GND OUTPUT INPUT on_BACKLIGHT 4 C702 100UF16V R708 4K7 1 16W 5 VCC3 3 5V 5V_VCC Q701 NC AO...

Page 56: ...UF M 35V ON OFF R930 2 43K OHM 1 1 10W ZD902 TZX18B NC BD901A KBP208G 2 1 3 4 VOL DIM MUTE C939 1000uF 25V CN901 SOCKET 1 2 3 Q901 STP10NK70ZFP R905 8 2K OHM 1 4W IC904 KIA431A AT P L906 JUMPER 1 2 R9...

Page 57: ...2 XXXX C802 0 047uF LV1 C805 0 022uF R840 1M 1 10W 5 C817 2PF6KV R812 100K 1 10W 1 R818 4R7 1 8W 5 LV4 R804 5K1 1 8W 5 CN802 CONN 1 2 LV3 R837 6K8 1 10W 5 R843 5K1 1 10W 5 R838 1M 1 10W 5 R808 360R 1...

Page 58: ...e G3503 A x x 1 20081225 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component HP_R HP_SENSE C653 0 01uF HP_R C651 0 01uF C652 0 01uF R654 0R05 1 10W 5...

Page 59: ...03 NC GND LBADC3 LED_RED AUTO R004 1K 1 10W 1 0 673V GND GND MENU C006 0 1uF C005 NC 0 001uF R007 3K 1 10W R003 1K 1 10W 1 R005 3K 1 10W LEFT 1 0K ZD005 NC GND C004 NC 0 001uF 3 0K ZD001 NC C010 0 1uF...

Page 60: ...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...

Page 61: ...tion 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...

Page 62: ...l Please reinsert and make sure the AC of 100 240 is normal Reinsert or check the power section Check if X401 oscillate waveforms are normal Measure U702 Pin2 3 3 and U704 Pin2 1 2V OK OK NG NG NG Rep...

Page 63: ...01 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer or change the cable NG OK NG Check U401 Replace U401 Measure U702 Pin2 3 3 a...

Page 64: ...1 base is low level X401 oscillate waveform is normal Check Correspondent component Replace Panel Check Correspondent component OK OK Replace X401 NG NG NG NG Check reset circuit of U401 is normal OK...

Page 65: ...of C905 Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901 Check R904 R905 Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V 1...

Page 66: ...ZD803 Check ON OFF signal Check Interface board or main board NG OK Check IC801 PIN 11 5V NG OK Change ON OFF circuit Check IC801 PIN8 PIN9 PWM wave NG OK Check IC801 Check Q805 Q806 Drain wave NG Ch...

Page 67: ...D 67 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch Y N N Is Key Pad Board normally Replace Key...

Page 68: ...23 LCD Color Monitor BenQ G2320HD 68 PCB LAYOUT Main Board...

Page 69: ...23 LCD Color Monitor BenQ G2320HD 69...

Page 70: ...23 LCD Color Monitor BenQ G2320HD 70 Power Board...

Page 71: ...23 LCD Color Monitor BenQ G2320HD 71...

Page 72: ...23 LCD Color Monitor BenQ G2320HD 72...

Page 73: ...4 6 1KGF CM 0M1G1030 6120 M3 6 FOR MB MAINFRAME FOR HMDI MAINFRAME 2 6 1KGF CM 0Q1G1030 6120 M3 6 FOR REAR COVER HEADPHONE JACK BOARD 1 12 2KGF CM AM1G1740 12 47 CR3 M4 12 FOR STAND HINGE FOR HINGE R...

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