BenQ G2320HDB Service Manual Download Page 54

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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

Check R904, R905, Change IC901

Check the auxiliary voltage is bigger than

10V and smaller than 20V

1) Check IC901

2) Check R909/D901/C908 circuit

Check D907/D908/IC903/IC904/ZD902

Check IC901 pin5 PWM wave

Check IC901

Summary of Contents for G2320HDB

Page 1: ...st Date 04 16 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 to...

Page 2: ...elated 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 Cleaning 12 Software Firmware Upgrade P...

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: ...atibility 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 conta...

Page 8: ...ay 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 6b...

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

Page 10: ...Color Monitor BenQ G2320HDB 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: ...lor Monitor BenQ G2320HDB 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: ...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 Upg...

Page 13: ...23 LCD Color Monitor BenQ G2320HDB 13 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...

Page 14: ...rogram 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...

Page 15: ...nnel 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 comp...

Page 16: ...HDB 16 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 17: ...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...

Page 18: ...20 00 00 00 FC 00 42 60 45 4E 51 20 47 32 33 32 30 48 44 42 00 00 00 FF 70 00 31 35 34 36 37 38 39 30 33 32 31 0A 20 00 74 Decoded EDID data Header Header 00 FF FF FF FF FF FF 00 x Header x Vendor Pro...

Page 19: ...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 20: ...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 21: ...20 00 00 00 FC 00 42 60 45 4E 51 20 47 32 33 32 30 48 44 42 00 00 00 FF 70 00 31 35 34 36 38 39 37 30 33 32 31 0A 20 00 61 Decoded EDID data Header Header 00 FF FF FF FF FF FF 00 x Header x Vendor Pr...

Page 22: ...17578125 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...

Page 23: ...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 24: ...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 25: ...e ENTER key to select this option and make adjustment H Position Adjusts the horizontal position of the screen image 0 to 100 V Position Adjusts the vertical position of the screen image 0 to 100 Pixe...

Page 26: ...enu Normal Allows video and still photographs to be viewed with natural coloring This is the factory default color 0 to 100 Bluish Applies a cool tint to the image and is factory pre set to the PC ind...

Page 27: ...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 28: ...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 29: ...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 Spani...

Page 30: ...all 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 opti...

Page 31: ...00 VESA 1024 x 768 60 02 75 03 78 750 VESA 1152 X 864 67 50 75 108 VESA 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 1280x800 49 702 59 81 83 5...

Page 32: ...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 DVI port Mode...

Page 33: ...TION REMARK 1 A34G1310ADPA1B0130 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 2 PCS SCRE...

Page 34: ...120 2 PCS SCREW STAND HINGE 15 A37G0117011 1 PCS HINGE_BENQ_G2320 16 A34G1312ADP 1B0100 1 PCS STAND FRONT 17 AM1G1740 12 47 CR3 4 PCS SCREW STAND HINGE REAR COVER 18 A34G1313ADP 1B0130 1 PCS STAND REA...

Page 35: ...SS 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 Fig1...

Page 36: ...23 LCD Color Monitor BenQ G2320HDB 36 3 Remove the rear cover 4 Remove the Panel Disconnect the Lamp Connections and LVDS Cable connection...

Page 37: ...23 LCD Color Monitor BenQ G2320HDB 37 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...

Page 38: ...23 LCD Color Monitor BenQ G2320HDB 38 MAIN BOARD POWER BOARD...

Page 39: ...20HDB 39 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 Connect...

Page 40: ...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 41: ...nect R210 10K 1 16W KEY1 4 C204 0 1uF 16V CMVCC LED_G 4 CN202 CONN 1 2 3 4 5 6 ZD201 NC UDZSNP5 6B 1 2 BKLT EN High ON 3 3V R207 120R 1 16W C205 0 1uF 16V C_PANEL_INDEX C209 0 1uF 16V ZD202 NC UDZSNP5...

Page 42: ...W 5 CBPCRRHBFQ1 1 2 BenQ G920HD B 3 6 Thursday January 08 2009 715G3327 1A 3 INPUT G3327 1A X X 5 090108 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Co...

Page 43: ...PWM5 DSCL2 P5 6 DSDA2 P5 7 RST ASCL1 P3 0 RXD NC NC ASDA1 P3 1 TXD VSS XO VCC P1 0 T2 P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 NC VSYNC NC P6 0 ADC0 P6 1 ADC1 P6 2 ADC2 P6 3 ADC3 P6 4 P6 5 P6 6 CLKO1 P6 7 X...

Page 44: ...RXE0 RXE3 BJT_B RTD_DDCSDA TMDS_VDD RXE0 RXCP LVDS_E9 RXEC RTD_R RTD_DDCSCL C506 0 1uF 16V RX2N LVDS_E2 RXE1 TMDS_VDD LVDS_O4 RXEC RXO3 DGND RXO2 LVDS_E3 RXOC C507 1uF 10V For HDCP RTD_R RX0N 3 RTD_G...

Page 45: ...LVDS_E 0 9 5 RXE2 RXEC 1 LVDS_E3 RXE0 RXE2 RXEC RXE0 R603 NC R606 NC 390R 1 8W 5 R604 47K 1 16W 5 Realtek Semiconductor Corp RXE0 RXO3 CN601 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23...

Page 46: ...FF R904 8 2K OHM 1 4W Q901 STP10NK70ZFP C901 1000pF R935 100 OHM 1 4W HS1 HEAT SINK Q901 1 2 R902 1M 1 4W 5 L906 JUMPER 1 2 C917 470UF M 35V 5V C918 470UF M 35V VOL C937 68pF1KV R951 100 OHM 1 4W DIM...

Page 47: ...6pF3KV C809 220pF R847 0R05 1 8W R818 4R7 1 8W 5 R804 5K1 1 8W 5 CN802 CONN 1 2 Q806 AO4620 1 2 3 4 5 6 7 8 S2 G2 S1 G1 D1 D1 D2 D2 R812 100K 1 10W 1 R844 5K1 1 10W 5 R843 5K1 1 10W 5 5V LV1 R839 1M 1...

Page 48: ...T LEFT ENTER Power AUTO 1 435V 0 673V LBADC2 RIGHT 1 435V LBADC1 0 673V 3 0K 1 8K ENTER AUTO 1 0K 3 0K MENU LBADC3 1 435V 0 673V LEFT 3 0K POWER 1 8K B C010 0 1uF C010 0 1uF C004 NC 0 001uF C004 NC 0...

Page 49: ...k 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 50: ...ution 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 51: ...icture is normal 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 U201 Pin2 3 3V OK OK NG NG NG Replac...

Page 52: ...rmal Replace X401 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...

Page 53: ...Q601 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...

Page 54: ...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 55: ...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 56: ...B 56 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 57: ...23 LCD Color Monitor BenQ G2320HDB 57 PCB LAYOUT Main Board...

Page 58: ...23 LCD Color Monitor BenQ G2320HDB 58...

Page 59: ...23 LCD Color Monitor BenQ G2320HDB 59 Power Board...

Page 60: ...23 LCD Color Monitor BenQ G2320HDB 60...

Page 61: ...23 LCD Color Monitor BenQ G2320HDB 61...

Page 62: ...PB MAIN FRAME 2 6 1KGF CM 0M1G1030 6120 M3 6 FOR MB MAIN FRAME 2 6 1KGF CM AQ1G1740 12120 M4 12 FOR HINGE STAND 2 12 2KGF CM AM1G1740 12 47 CR3 M4 12 HINGE STNAD 2 12 2KGF CM AM1G1740 12 47 CR3 M4 12...

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