BenQ G2020HDA Service Manual Download Page 8

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20” LCD Color Monitor BenQ G2020HDA

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

5. Product Overview

5.1 Monitor Specifications

G2020HDA

Display

Panel model

SEC/LG/AUO/ CMO/CPT

Panel Type (TN / VA / IPS)

Panel Size

20"W (2 lamp)

Display Area

442.8x249.2mm

Native. Resolution

1600 x 900

Pixel Pitch

0.2768x0.2768

Brightness (Typ.)

250 nits

Contrast Ratio (Typ.) / DCR (Min.) 1000:1 (Panel) /40000:1 (DCR); Min :20000:1

Viewing Angle (H/V), CR

≧

160/160

Display Colors

16.7M (6bit+Hi-FRC)

Response Time

5ms (Tr+Tf)

GtG response Time

N/A

NTSC ratio

72%

Video

BenQ Senseye

Technology Yes

BenQ Senseye

Preset Modes

5 Modes (by hotkey)

Standard / Movie / Dynamic / Photo / s-RGB

Color Temperature Selection

Normal (6500°K) / Reddish (5800°K) / Bluish (9300°K) /

User Mode

Hor. Frequency (KHz)

24kz~83Kz

Ver. Frequency (Hz)

50Hz~76Hz

Video Bandwidth (MHz)

165Mhz

Summary of Contents for G2020HDA

Page 1: ...Date 09 03 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 e...

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: ...ervice or maintenance to it Before performing any maintenance or service the engineer MUST read the Important Safety Information 1 2 Trademark 2 Introduction This section contains general service info...

Page 6: ...s power is disconnected from the mains power supply Check that it is disconnected before opening the product s cabinet 7 Modules containing electrical components are sensitive to electrostatic dischar...

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: ...A IPS TN Panel Size 20 W 2 lamp Display Area 442 8x249 2mm Native Resolution 1600 x 900 Pixel Pitch 0 2768x0 2768 Brightness Typ 250 nits Contrast Ratio Typ DCR Min 1000 1 Panel 40000 1 DCR Min 20000...

Page 9: ...flute Power LED Green ON Amber Standby Tilt Up Down 20 5 VESA Wall Mount 100 x 100mm Kensington Lock Yes Container Loading 40 1600 Container Loading 20 800 Multi language Support OSD 17 Languages Engl...

Page 10: ...Color Monitor BenQ G2020HDA 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: ...20 LCD Color Monitor BenQ G2020HDA 11 Putting the base and D SUB cable in the position as the picture shows above Putting the monitor and accessories into the carton User manual Power cord...

Page 12: ...ator 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 do the...

Page 13: ...20 LCD Color Monitor BenQ G2020HDA 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: ...enQ_G2020HDA_2045LH_SEC_V004 H00 and click open d Click icon search the program BenQ_G2020HDA_2045LH_SEC_V004 H01 and click open e Click icon search the program BenQ_G2020HDA_2045LH_SEC_V004_EXTEND an...

Page 15: ...may be also obtained from VESA 1 When does the part need the tools as follow a An i486 or above personal computer or compatible b Microsoft operation system Windows 95 98 2000 XP c PORT95NT exe TPVDD...

Page 16: ...20 LCD Color Monitor BenQ G2020HDA 16 4 The process of ISP write is as follow a Double click appear as follow b Choose Analog and then click Loadfile it will show the picture as follow...

Page 17: ...17 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...

Page 18: ...0 32 60 4C 18 53 11 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 42 65 6E 51 20 47 32 30 32 30 48 44 41 00 05 Decoded EDID data Header Header 00 FF FF FF FF FF FF 00 x Header x Vendor Product Identificat...

Page 19: ...etailed Timing GTF supported No Basic Display Parameters Features Color Characteristics Red x 0 6484375000 Red y 0 3388671875 Green x 0 2929687500 Green y 0 6025390625 Blue x 0 1425781250 Blue y 0 070...

Page 20: ...iming 1600x900 60Hz x Detailed Timing Descriptions x Detailed Timing Descriptions Detailed Timing FF Monitor SN 21231321233 Detailed Timing FD Monitor limits Min V rate 50Hz Max V rate 76Hz Min H rate...

Page 21: ...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 22: ...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 23: ...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 image and is factory pre set to the PC industry standard white co...

Page 24: ...ER key to enter the menu 3 Press the or keys to move the highlight to a menu item and then press the ENTER key to select that item 4 Press the or keys to make adjustments or selections 5 To return to...

Page 25: ...yed without geometric distortion Full Scales the input image to fill the screen Ideal for 16 9 aspect images Aspect The input image is displayed without geometric distortion filling as much of the dis...

Page 26: ...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 27: ...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 28: ...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 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 4...

Page 29: ...rvice 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 And need to have a warning message to double confirm the re...

Page 30: ...1 Q23G3178881 1A 1 PCS LOGO 2 A34G1308ADPB1B0130 1 PCS BEZEL 20 3 Q33G0288 2 1C0100 1 PCS LENS 4 Q33G0287ADP 1L0100 1 PCS KEYPAD 5 KEPC8QJ4 1 PCS KEY BOARD 6 750GLS200KT312N000 1 PCS PANEL 7 PWPC9A21...

Page 31: ...Q34G0545ADP 1B0100 1 PCS STAND FRONT 16 AQ1G1740 12120 2 PCS SCREW STAND HINGE 17 Q37G0125021 1 PCS HINGE 18 0M1G1740 8 47 CR3 1 PCS SCREW FOR GROUND 42 D000649 STAND HINGE 19 Q34G0546ADP 1B0130 1 PC...

Page 32: ...ve 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 sta...

Page 33: ...20 LCD Color Monitor BenQ G2020HDA 33 3 Remove the rear cover 4 Remove the Panel Disconnect the Lamp Connections and LVDS Cable connection...

Page 34: ...tor BenQ G2020HDA 34 5 Remove the Main Board and Power Board Remove the AC shielding and remove the screws in red and disconnect the all connections in blue at last you can get the Main Board and Powe...

Page 35: ...20 LCD Color Monitor BenQ G2020HDA 35 MAIN BOARD POWER BOARD...

Page 36: ...olor Monitor BenQ G2020HDA 36 Block Diagram Main Board D Sub Connector CN301 H sync V sync RGB Panel Interface CN601 Key Control Interface CN202 Crystal 24MHZ X401 Scalar RTD2045L GR U501 MCU RTD2122L...

Page 37: ...er Start Resistor R904 R932 PWM Control IC901 Transformer AC input Feedback Circuit Transformer T801 MOSFET Q802 Lamp 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes Output Circuit PW...

Page 38: ...ht Dimming 3 3V PWM Volume R208 120R 1 16W 07 01 10 change to Elite LED_G 4 C210 0 1uF 16V R207 120R 1 16W DIM 4 U201 AP1117E33LA 1 2 3 VSS VOUT VIN VCC3 C205 0 1uF 16V 06 12 29 3 Change R207 R208 Val...

Page 39: ...TA9SRKN8FWBQNN 1 0 BenQ G2020HDA B 4 7 Monday February 09 2009 715G2498 2A AO 4 INPUT G2498 2A AO X 15 090209 OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd...

Page 40: ...e Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component MVCC PANEL_VCC R414 4K7 1 16W DIM 2 DSUB_CONNECT 3 POWER_KEY IICSDA PPWR_ON 6 C409 NC 22pF 16V DDC1_SDA 3 KEY0...

Page 41: ...XIN DDCSCL PWM0 DDCSDA PWM1 IRQ SCL SDA VCCK PGND TXO0 TXO0 VCC3 LVDS_O 0 9 6 RXE1 DGND RTD_R 3 LVDS_E0 LVDS_E9 LVDS_O9 RTD_B 3 RXO1 RXE2 RXE2 R507 3 3 2W RXE0 RXO2 CRYSTAR_OUT 4 RTD_H RXE1 LVDS_E1 RX...

Page 42: ...XO1 PPWR_ON LVDS_E9 LVDS_O8 C603 0 1uF 16V RXOC 2006 11 7 Add pull up 4K7 to MVCC LVDS_O5 RXEC CMVCC LVDS_E1 R603 NC RXE2 RXE2 1 RXE1 PANEL_VCC PANEL_VCC RXEC RXE0 LVDS_E8 RXO1 PPWR_ON 4 RXO1 RXE1 C60...

Page 43: ...923 NC 1 2 R927 3 6K OHM 1 1 10W C928 0 01uF N C C910 NC R921 NC CN901 87G 501 32 DL SOCKET 1 2 3 5V GND1 GND 1 2 C917 680uF 25V R919 100 OHM 1 4W F904 NC Q904 NC R910 10R 1 4W T901 POWER X FMR 7 8 9...

Page 44: ...DIM C824 0 1uF R810 51K OHM 1 1 8W C823 0 0022uF Q805 PDTC144WK R856 15R 1 4W R818 1K 1 10W 1 C817 NC ON OFF C845 2 2uF 16V R862 1M 1 10W 5 R807 10K 1 10W 1 12V D811 NC R863 10K 1 10W 1 R827 1K 1 10W...

Page 45: ...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 46: ...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 47: ...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 48: ...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 49: ...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 50: ...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 51: ...C907 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 Ch...

Page 52: ...801 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 Check...

Page 53: ...HDA 53 Key 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 P...

Page 54: ...20 LCD Color Monitor BenQ G2020HDA 54 PCB LAYOUT Main Board...

Page 55: ...20 LCD Color Monitor BenQ G2020HDA 55 Power Board...

Page 56: ...6120 M3 6 FOR POWER BOARDS MAIN FRAME 3 6 1KGF CM 0M1G1030 6120 M3 6 FOR MAIN BOARDS MAIN FRAME 2 6 1KGF CM 0M1G1740 8 47 CR3 Q4 8 FOR HINGE STAND 1 6 2KGF CM AQ1G1740 12120 M4 12 FOR HINGE STAND 2 6...

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