BenQ BL2423PT Product Service Manual – Level Ii
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BenQ BL2423PT Product Service Manual – Level Ii

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Product Service Manual – LevelⅡ
Service Manual for BenQ:
BL2423PT
9H.LFSLA.TBA
Applicable for All Regions
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 (Aug. 2016)
©
Copyright BenQ Corporation 2016. All Right Reserved.
nd
Version: 2
Date:12-13-2016
1

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Summary of Contents for BenQ BL2423PT

  • Page 1 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 (Aug. 2016) ©...

  • Page 2: Table Of Contents

    Content Index Abbreviations & Acronyms ............................3 1. About this Manual ..............................5 1.1 Important ................................5 1.2 Trademark ................................5 2. Introduction ................................6 2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS............. 6 2.2 Safety Warning and Notice Installation ......................6 2.3 Compliance Statement ............................

  • Page 3: Abbreviations & Acronyms

    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®...
  • Page 4 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 and B, all colors (Y/C) are Read Only Memory Data signal on I...

  • Page 5: About This Manual

    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”.

  • Page 6: Introduction

    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.

  • Page 7: Compliance Statement

    BenQ service center for assistance. 6. To avoid possible electric shock, do not dissemble or repair the monitor. 7. If a bad smell or an abnormal sound appears to come from the monitor, contact your nearest BenQ service center for assistance immediately.

  • Page 8: General Description

    3. General Description This new LCD (Liquid Crystal Display) monitor BenQ BL2423PT offers numerous features and functions, for example:  Panel Type: IPS+LED  Minimal space requirements thanks to slim casing  Optimum ergonomic characteristics (totally distortion-free, excellent picture definition and color purity right into the corners) ...

  • Page 9: Product Overview

    5. Product Overview 5.1 Monitor Specifications BL2423PT Configuration: VGA+DVI_D+DP1.2 Panel Type (TN / VA / IPS) IPS+LED Panel Model LM238WF1 SLK1 23.8” (16:9) Panel Size Display Area 23.8 inches(604.70mm) diagonal Max. Resolution 1920x1080 Pixel Pitch 0.2745 Brightness (Typ.) Contrast Ratio (Typ.) / DCR (Min.) 1000:1 (Panel) / 20M:1 (DCR) Viewing Angle (H/V), CR≧10...
  • Page 10 Speakers (built-in) 1W x 2 Volume Adjustment 0~100 Mute On/ Off PC Video Input HDMI Input AV Video Input Audio Line In Headphone Jack USB2.0 Yes (2*downstream(Rear), 1*upstream) D-Sub (VGA) Display Port Yes (DisplayPort1.2*1) Voltage Rating 90~264 AC Build in Power-On Mode Standby Mode <0.5W...
  • Page 11 Mac Compatible SRGB Pro Component color Space select HDMI Color Range Select Gamma Select 5 step (1.8~2.6) Auto Pivot Display Mode Full/ Aspect Ratio/ 1:1 Overscan Light Sensor (Eye Protect) Proximity Sensor (ECO sensor) DC 調光 Smart Scaling Smart Reminder AC Switch On-line Gamma calibration Dynamic Power Saving...

  • Page 12: Certification

    5.1.1 Certification Apply Apply by Sample Type Region Country Certification Level Document Type Vendor Request BenQ Canada EPEAT Gold Certificate Canada EPEAT Gold Reports USA & cTUVus Certificate Canada USA & FCC and IC Canada USA & FCC and IC...
  • Page 13 EPEAT Silver Certificate EPEAT Silver Reports Reports REACH Evidence WEEE Reports Germany Ergo Certificate Germany Certificate Russia, Certificate Belarus Safety & Ukraine Certificate EMC DoC Ukraine UkrSEPRO Certificate Korea e-Standby Certificate...
  • Page 14 Certificate International CB Scheme Reports International International Energy Star Certificate International International Energy Star Reports RoHS & International International BenQ GP Evidence Guideline International International Certificate BenQ Document provide Standard Information & Assign Lab Quotation Remark Target Date Actual Date...
  • Page 15 IEEE 1680.1 IEEE 1680.1 UL60950-1& CSA For both US and C22.2 No. 60950-1-07 Canada use. FCC part 15B; ICES-003 FCC part 15B; ICES-003 製造商: 明基電 GB4943, GB9254, 通有限公司 GB17625.1 製造商: 明基電 GB4943, GB9254, 通有限公司 GB17625.1 製造商: 明基電 GB4943, GB9254, 通有限公司 GB17625.1 CQC31-452629, GB 21520...
  • Page 16 2005/32/EC, 2009/125/EC, EC No 1275-2008 and its implementation measurements. EC No. 1907/2006 & SVHC lists, No. 552/2009 2002/96/EC and its amendments ISO9241-307; prEN 50279; EK1-ITB 2000 EN60950-1; EK1-ITB 2000; ZEK 01.2-08/12.8 CISPR22; CISPR24; IEC60950-1 IEC60950-1 Ministry of Knowledge Economy Notification No.
  • Page 17 KN22, KN24, K00022 (CISPR22), K00024 (CISPR24) KN22, KN24, K00022 (CISPR22), K00024 (CISPR24) Includes JP IEC 60950-1 deviation Includes JP IEC 60950-1 deviation ENERGY STAR Program Requirements for Displays ENERGY STAR Program Requirements for Displays 2011/65/EU & SUP-QM-07-02 TCO Certified Displays...

  • Page 18: Panel Inspection Specification

    5.2 Panel Inspection Specification...

  • Page 26: Level 1 Cosmetic / Appearance / Alignment Service

    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. ...
  • Page 27 2.Connection 3.Install USB driver. 3.1. When insert the USB cable to PC USB port, will pop up a Hardware Wizard to help you install the USB driver if you use this ISP board first time. You can install it successfully as the below instruction step by step. Remark: The USB driver files path: D:\FTC100103(Mstar)\FTCUSB.INF...
  • Page 29 After installation the USB serial port driver, please check the port. Look the properties of “my Computer” 4. Install RTD tool. 4.1. double- clicks the icon to run it. Note: Must to install driver firstly...
  • Page 30 4.2. Choose the FTDIUSB communication way. 4.3 Click “ISP” and “ISP Option” to set the parameter.
  • Page 31 4.4 Close the “ISP Option” window and click the “BigBin” to load the correct F/W. 4.5 Click to start programming.
  • Page 32 4.6 After about 20 minutes, there will pop up message as below figure which promotes the upgrade successful. 5. Check the FW version after upgrade. 5.1. The way to open factory menu. (1)Connect signal source and power cable to monitor and DC off it. (2) Press “menu”...
  • Page 33 Menu key Check this F/W version. (3) If the version is right, please do factory reset in user menu as below, or re-upgrade F/W as the above steps. The reset will turn off burn in mode.

  • Page 34: Factory Mode

    5.3. The way to open BenQ factory menu (1)Connect signal source and power cable to monitor and DC off it. (2) Press “source” key, “return” key and “power on” key synchronously as below figure. When the screen lights, release the three buttons and then press “return” key to open below factory menu.
  • Page 35 Upgrade by 715GT089-B Materials list VGA cable USB cable TPV P/N: 089G728 GAA DB TPV P/N: 089G1758 X MSTAR driver ISP JIG: 715GT089-B Monitor USB port driver ISP tool EDID...
  • Page 36 Restart PC after installation. 4. Prepare the EDID written. 4.1. Change the EDID files name as below rule. VGA EDID WA.dat DP EDID WP.dat DVI EDID WD.dat 4.2. Copy these files to one folder named as BENQ BL2423PT which must contains “config.ini” file.
  • Page 37 4.3. Copy BENQ BL2423PT to DDC folder and put DDC and ISP tool together. 5. Run the ISP tool 5.1. Double-click the icon to open the tool.
  • Page 38 5.2. Select the EDID folder. 5.3. Load EDID successful.
  • Page 39 5.4 Tick the “Only connect VGA” and “Debug Imformayion”. 5.5 type in the date and the 13 digit S/N.
  • Page 40 5.6. Start to writing. Click “write EDID” to start writing. When The green “PASS” appear, the process is finished. 6. Troubleshooting. 6.1. Can’t write! (1) AC on the monitor and turn on it.(Restart the monitor) (2)Take apart the monitor and connect the 7pin of EEPROM to GND to diable write protection then write EDID one by one.

  • Page 41: Adjustment / Alignment Procedure

    Adjustment / Alignment Procedure The Control Panel...
  • Page 42 Basic menu operation All OSD (On Screen Display) menus can be accessed by the control keys. You can use the OSD menu to adjust all the settings on your monitor.
  • Page 44 Display Menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 46 Picture menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 48 Picture advanced menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear.
  • Page 52 Audio menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 53 System menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 56 Ergonomics menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 58 Eco menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. And keys that are not available will be disabled and the corresponding OSD icons will disappear. For models without certain functions, their settings and related items will not appear on the menu.
  • Page 60 FS: Fail Save Mode (show “out of range”, but still can see picture) O: Out of Range (only show “out of range”, without picture) Resolution Pixel clock H-sync V-sync 1920x1080 BenQ Preferred VA Panel Mode Number (Piexl clock : 83M) Resolution (unit:MHz) (unit:KHz)
  • Page 61 1024x768 78.43 57.67 72.00 1024x768 80.00 60.24 74.93 DMT-8 1024x768 78.75 60.02 75.03 DMT-9 1024x768 94.50 68.68 85.00 1152x720 66.75 44.86 1152x864 94.50 63.85 70.01 DMT-10 1152x864 108.00 67.50 75.00 GTF-7 1152x864 119.651 77.09 85.00 1152x870 100.00 68.68 75.06 1152x900 92.94 61.80 65.95...
  • Page 62 DMT-25 1440x900 106.5 55.935 59.887 1440x900 136.75 70.6 1600X900-R 1600x1000-R 108.5 61.648 59.910 CVT-10 1600x1000 132.25 62.14 59.87 1600x1000 169.25 78.356 74.83 CVT-2 1600x1200-R 130.25 74.01 59.92 DMT-14 1600x1200 162.00 75.00 60.00 1600x1200 175.50 81.25 65.00 1600x1200 189.00 87.50 70.00 DMT-15 1600x1200 202.50...
  • Page 63 CVT2.76M4 1920X1440 112.50 74.9 CVT-R 2048x1152-R 156.75 70.992 59.9 2048x1152 71.584 59.9 2048x1280-R 174.25 78.918 59.922 CVT3.15M3-R 2048x1536-R 209.25 94.7 59.9 CVT3.15M3 2048x1536 267.25 95.4 59.9 2560x1440 241.5 88.787 59.951 CVT4.10MA-R 2560x1600-R 268.5 98.713 59.972 4.10MA 2560x1600 348.5 99.4 59.9 DMT-4E 2560x1600 443.25...
  • Page 64 DP HPD: To disable the hot plug pin detection.(DP port default: Off) DVI HPD: To disable the hot plug pin detection.(DVI port default: Off) 8. Add BenQ logo on/off item, the default is “on” 9. Add the auto power on item, the default is “on”...

  • Page 65: Level 2 Circuit Board And Standard Parts Replacement

    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 http://cs.tpv.com.cn/hello1.asp for the latest information. Item Description Unit BEZEL PANEL INSULATING SHEET ADAPTER BOARD NA stand-base ass'y...
  • Page 66 0D1G1030 6120 SCREW 0M1G1740 6120 SCREW 0D1G1030 6120 SCREW 0M1G3030 6120 SCREW 0Q1G2030 6120 SCREW Q01G6146 3 SCREW ART. Part NO. Description Unit Q44GD1781010KL CUSHION-REAR L24W-Xbenq1-p1 Non-region( Q44GD1782010KL CUSHION-FRONT L24W-Xbenq1-p1 Non-region Q44GD1783010KL CUSHION-M L24W-Xbenq1-p1 Non-region(Glo Q44GD17888104A00DL ARTWORK CARTON BL2423PT WW...

  • Page 67: Six Angles' View

    Six Angles’ View...

  • Page 68: Product Disassembly/Assembly

    Product Disassembly/Assembly Disassembly 1) Remove the stand-base assy Place the monitor on a smooth surface. Be careful to avoid scratch and injury during the process of uninstall. Remove the screws and then rotate the base as below picture to remove the base. Open Remove the stand.
  • Page 69 Remove the rear cover Unscrew the screws from the rear cover. Pull apart bezel & rear cover. Note: Be careful, the BEZEL CLIP is easy to break.
  • Page 70 Note: The positions of the clips on the rear cover are as follow. There are some small gaps between CLIPS. It’s suggested to separate bezel and rear cover from the gaps. Example: You can separate the bezel and rear cover from here. Remove the main frame from the panel.
  • Page 71 Turn over the mainframe to remove the tapes, LVDS cable and the connector. Remove the AC cover from the mainframe. Remove the boards from the main frame Remove the mylar from the mainframe.
  • Page 72 And then remove screws in red, pull out the wire to remove the main board and power board. The main board The power board Turn over the power board and main board; remove the cables.
  • Page 73 Remove the speaker Pull at the foot of the speaker strongly as follow picture. Remove the panel Note：Be course the panel is easy to broken, when we remove the panel, we should hold the iron on the panel edge use two hands at the same time, and should avoid touching the panel surface.
  • Page 74 Unscrew the screws and remove the cover to remove the key board and daughter board from bezel.
  • Page 75 Assembly 1) Assemble the speaker on the main frame Put at the foot of the speaker strongly. The wire of the speaker will be traversed from the middle hole as follow picture. The wire will connect main board and speaker. 2) Assemble the wires Assemble the wire (the power board to main board), the wire (speaker to main board) and LVDS cables (the Wire from main board will connect to panel).
  • Page 76 3) Assemble the main board and power board on the main frame. Connect main board and power board; Lock the main board and power board on the mainframe. The main board The power board 4) Assemble the AC-COVER.
  • Page 77 5) Assemble the panel on the bezel.
  • Page 78 6) Assemble the main frame. Connect the LVDS cable, key board cable and past the tapes. Turn over the mainframe; connect the cables; Stick the black rubberized fabric and aluminum foil and Stick the black rubberized fabric and aluminum foil..
  • Page 79 7) Assemble the stand. Lock the screws on the rear cover. 8) Assemble the stand. Push the stand to the rear cover.

  • Page 80: Troubleshooting

    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.
  • Page 81  If the external speakers are USB-powered, check whether the USB connection is OK.  Increase the volume (volume may be muted or too low) on the external speakers. Need more help? If your problems remain after checking this manual, please contact your place of purchase or e-mail us at: Support@BenQ.com...
  • Page 82 No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicates is OK? Replace the power board Replace main board and check connections Replace key board and check connections...
  • Page 83 No Video (Power LED White) No Video (Power LED White) Press the power Replace the main board button is OK? Replace the power The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 84 DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature Check”...
  • Page 85 Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...

  • Page 86: Appendix 1 - Screw List / Torque

    Appendix 1 – Screw List / Torque Part NO. Type Description Quantity Torque Q01G6019 1 Q2*2.5 SCREW(FOR COVER_FUNCTION& LIGHT 6 ± 1kgf.cm SENSOR BOARD) 0D1G1030 6120 D3*6 SCREW(FOR POWER BOARD & MAINFRAME) 6 ± 1kgf.cm 0M1G1740 6120 M4*6 SCREW(FOR POWER BOARD & MAINFRAME) 6 ±...

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