BenQ M2400HD - 24" LCD Monitor Service Manual
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BenQ M2400HD - 24" LCD Monitor Service Manual

24” lcd color monitor
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See also: Service Manual , User Manual
Applicable Country & Regions: Europe/China
Service Manual for BenQ:
LCD E2400HD
(D-SUB+DVI-D+HDMI1.3
+ Black Bezel)
Product Service Manual – Level 1~2
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 (August, 2008)
©
Copyright BenQ Corporation 2008. All Right Reserved.
Version: 1st
Date:07-08-2008
1

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Summary of Contents for BenQ M2400HD - 24" LCD Monitor

  • 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 (August, 2008) ©...

  • Page 2: Table Of Contents

    24” LCD Color Monitor BenQ E2400HD Content Index Abbreviations & Acronyms............................3 1. About This Manual..............................5 1.1 Important ................................5 1.2 Trademark................................5 2. Introduction ................................5 2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS.............5 2.2 Safety Notice ..............................6 2.3 Compliance Statement ............................6 3.

  • Page 3: Abbreviations & Acronyms

    24” LCD Color Monitor BenQ E2400HD Abbreviations & Acronyms Analogue to Digital Converter Automatic Frequency Control: control signal used to tune to the correct frequency BenQ Corporation BenQ Broadcast Television System Committee BTSC Central Process Unit Composite Video Blanking and Synchronisation CVBS Digital Light Processing / Texas Instruments®...
  • Page 4 24” LCD Color Monitor BenQ E2400HD Personal Computer Printed Circuit Board (or PWB) Remote Control transmitter Red, Green, and Blue. The primary colour signals for TV. By mixing levels of R, G, and B, all colours (Y/C) are Read Only Memory...

  • 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: Safety Notice

    Caution: This Optical Storage Product contains a Laser device. Refer to the product specifications and your local Laser Safety Compliance Requirements. 3. General Description This new LCD (Liquid Crystal Display) monitor BenQ E2400HD offers numerous features and functions, for example: ● TFT display (Thin Film Transistor; active matrix) ●...

  • Page 7: Related Service Information

    24” LCD Color Monitor BenQ E2400HD ● high resolution (1920x1080) ● presentation of up to 16.7 million colours (in conjunction with an appropriate graphics card) ● automatic scanning of horizontal frequencies from 30 to 83 kHz and refresh rates (vertical frequencies) from 50 to 76 Hz (absolutely flicker-free) ●...

  • Page 8: Product Overview

    24” LCD Color Monitor BenQ E2400HD Service Web Site eSupport URL:http://esupport.benq.com 5. Product Overview 5.1 Monitor Specifications Panel Type Size 24" Pixel pitch 0.277mm(H) × 0.277mm(V) 531.36 (H) x 298.89 (V) Display Area 170, 160 (CR>10) Viewable angle LCD Panel...

  • Page 9: Packing

    24” LCD Color Monitor BenQ E2400HD 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. Putting the base into the PE bag...

  • Page 10: Level 1 Cosmetic / Appearance / Alignment Service

    24” LCD Color Monitor BenQ E2400HD Using the EPS to pack the monitor Putting the base and user manual in the position as the picture shows above.

  • Page 11: Level 1 Cosmetic / Appearance / Alignment Service

    24” LCD Color Monitor BenQ E2400HD Power cord, Signal cable, Audio cable Putting the monitor and accessories into the carton.

  • Page 12: Level 1 Cosmetic / Appearance / Alignment Service

    24” LCD Color Monitor BenQ E2400HD 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 13 24” LCD Color Monitor BenQ E2400HD...
  • Page 14 24” LCD Color Monitor BenQ E2400HD...
  • Page 15 24” LCD Color Monitor BenQ E2400HD...
  • Page 16 24” LCD Color Monitor BenQ E2400HD Click to complete the installation. Note: After installation, you must restart the PC to take the setup to effect.
  • Page 17 24” LCD Color Monitor BenQ E2400HD 3. Connect the ISP board as follow: Connect to Connect to the the PC LPT BenQ model 4. The process of ISP write is as follows. a. Double-click ，running the program as follows:...
  • Page 18 24” LCD Color Monitor BenQ E2400HD b. Click icon, running the program as follows: c. Click icon, load the program”E2400W-TSUMU88EDI-M240HW01-V0x-20080801_V027_B15B.BIN”...
  • Page 19 24” LCD Color Monitor BenQ E2400HD d. Click icon, it will auto run. If burn in success, it will show as the follow picture:...

  • Page 20: Adjustment / Alignment Procedure

    24” LCD Color Monitor BenQ E2400HD 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.
  • Page 21 24” LCD Color Monitor BenQ E2400HD Display menu 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.
  • Page 22 24” LCD Color Monitor BenQ E2400HD Picture menu 1. Press the MENU key to display the main menu. 2. Press the keys to select PICTURE 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.
  • Page 23 24” LCD Color Monitor BenQ E2400HD to be viewed with natural coloring. This is the factory default color. Applies a cool tint to the image and Bluish 0 to 63 is factory pre-set to the PC industry standard white color.
  • Page 24 24” LCD Color Monitor BenQ E2400HD Picture Advanced menu 1. Press the MENU key to display the main menu. 2. Press the keys to select PICTURE ADVANCED 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.
  • Page 25 24” LCD Color Monitor BenQ E2400HD Item Function Operation Range Selects a picture mode that best suits the type of images shown on the screen. • Standard - for basic PC application. • Standard • Movie - for viewing videos.
  • Page 26 24” LCD Color Monitor BenQ E2400HD Audio menu 1. Press the MENU key to display the main menu. 2. Press the keys to select PICTURE 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.
  • Page 27 24” LCD Color Monitor BenQ E2400HD System menu 1. Press the MENU key to display the main menu. 2. Press the keys to select SYSTEM 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.
  • Page 28 24” LCD Color Monitor BenQ E2400HD • Romanian • Dutch • Russian • Swedish • Portuguese Adjusts the horizontal H. Position 0 to 100 position of the OSD menu. Adjusts the vertical V. Position 0 to 100 position of the OSD menu.
  • Page 29 24” LCD Color Monitor BenQ E2400HD the software on the PC. option. Press the keys to change the settings. Displays the current Press the ENTER Information monitor property settings. key to select this option. Press the ENTER When this function is activated,...
  • Page 30 Mode1: 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 ”...

  • Page 31: Level 2 Circuit Board And Standard Parts Replacement

    24” LCD Color Monitor BenQ E2400HD Level 2 Circuit Board and Standard Parts Replacement Product Exploded View Six angles’ view...

  • Page 32: Product Disassembly

    24” LCD Color Monitor BenQ E2400HD 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 uninstall. And then remove the four screws as below to remove the stand-base ASS’Y.
  • Page 33 24” LCD Color Monitor BenQ E2400HD 3).Remove the Bezel Release the four screws marked in red as below to remove the bezel. Remove the USB shield. Fig.3 4).Remove the Panel Remove the 4 screws on the side of main frame first, and then disconnect the Lamp Connections and LVDS...
  • Page 34 24” LCD Color Monitor BenQ E2400HD 5).Remove the Main Board and Power Board Remove the screws in red and disconnect the all connections, at last you can get the Main Board and Power Board as follow. MAIN BOARD POWER BOARD...

  • Page 35: Block Diagram

    24” LCD Color Monitor BenQ E2400HD Block Diagram Main Board Crystal 14.318MHz Audio in LCD Interface (X401) (CN604) (CN403) Scalar TSUMU88EDI-LF-1 PQFP-128 Key Board Control (Include ADC, OSD, MCU) (CN401) (U401) H sync Digital V sync Video Data APA2069JITUL D-Sub...
  • Page 36 24” LCD Color Monitor BenQ E2400HD Power Board AC input Rectifier Bridge Rectifier Transformer EMI filter Diodes and Filter Start Circuit CN902 R904, R905 Over Voltage Control IC Protect ON/OFF MOSFET Q805, Q806, Output DC Convert Circuit Circuit Lamp ON/OFF...

  • Page 37: Schematic Diagram

    24” LCD Color Monitor BenQ E2400HD Schematic Diagram Main Board VCC3.3 CN701 +5V1 R701 CN702 FB701 10K 1/16W 5% 120 OHM/NC R702 1K 1/16W 5% Adj_BACKLIGHT 4 ON/OFF VCC3.3 CONN/NC VCC3.3 FOR USB BD R703 CONN 10K 1/16W 5% C701...
  • Page 38 24” LCD Color Monitor BenQ E2400HD close to CONN close to scalar RED+ FB101 0R05 1/10W 5% FB105 60 OHM R101 33R 1/16W 5% C101 0.047uF RED- GREEN+ FB102 0R05 1/10W 5% FB106 60 OHM R102 33R 1/16W 5% C102 0.047uF...
  • Page 39 24” LCD Color Monitor BenQ E2400HD VCC3.3 VDDP VDDC VDDP VDVI ADC1.8 FB401 47mA 120 OHM C402 C403 C404 C405 C406 C407 C401 U401 22uF/50V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V TSUMU88EDI-LF-1 PA[0..9] VCC3.3 VDVI PA[0..9]...
  • Page 40 24” LCD Color Monitor BenQ E2400HD CONN PA[0..9] PA[0..9] CN403 LVA3P LVA3M LVB0P RXO0+ LVB0M RXO0- LVACKP LVB1P RXO1+ LVB1M RXO1- LVACKM LVB2P RXO2+ LVB2M RXO2- LVA2P LVBCKM RXOC- LVA2M LVB3M RXO3- LVBCKP RXOC+ LVA1P LVA0M RXE0- LVB3P RXO3+ LVA1M...
  • Page 41 24” LCD Color Monitor BenQ E2400HD HDMIESD U501 HDMI1_CK- HDMI1_CK- HCK- CN501 HDMI R501 0R05 1/16W Line-4 HCK- HDMI1_CK+ HDMI1_CK+ HCK+ R502 0R05 1/16W SHELL1 Line-3 HCK+ HDMI1_D2+ HDMI1_D0- HDMI1_D0- R503 0R05 1/16W HD0- HD0- D2 Shield Line-2 HDMI1_D2- HDMI1_D0+...
  • Page 42 24” LCD Color Monitor BenQ E2400HD +5V1 FB601 120 OHM U601 C601 C602 PCM1754DBQR 0.1uF 16V 22uF/50V AUSCK I2S_SCK HINL R601 22R 1/16W 5% C603 22uF/50V R602 22K 1/16W 5% C604 1uF 10V AUSCK VOUTL AUSDO I2S_SD0 R603 22R 1/16W 5%...
  • Page 43 24” LCD Color Monitor BenQ E2400HD Power Board L904 100 OHM 1/4W R918 Coil +12V 100 OHM 1/4W R919 C912 ZD902 0.001uF R946 100 OHM 1/4W R920 C917 150OHM2W MTZJ T-72 16B C918 Bom Change jump wire D906 680uF/25V 680uF25V...
  • Page 44 24” LCD Color Monitor BenQ E2400HD R812 C813 180pF C819 NC /47pF/3KV 12K 1/8W 5% CN801 CONN Q805 AM4502C-T1-PF +12V ON/OFF ZD802 GDZJ5.6B ZD803 C814 R816 180pF GDZJ5.6B PT801 C820 1M 1/4W 5% C823 POWER X'FMR NC/47pF/3KV R813 R803 R804 0.1uF...
  • Page 45 24” LCD Color Monitor BenQ E2400HD Key Board CN002 LED_GRN# LED_RED# POWER CONN CN001 R003 1.8K1/10W R002 3K 1/10W 1% LBADC1 LBADC2 R005 3K 1/10W 1% DC_POWERON R004 1.8K1/10W LED_GRN# LED_RED# POWER R006 1.8K1/10W R007 3K 1/10W 1% C003 C004...

  • Page 46: Troubleshooting Guide

    24” LCD Color Monitor BenQ E2400HD 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.
  • Page 47 24” LCD Color Monitor BenQ E2400HD 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 100-240V is normal Reinsert or check the power section...
  • Page 48 24” LCD Color Monitor BenQ E2400HD (2) No picture No picture Check if the Pin 3, 4 of CN701 are 5V input Check power board Measure U701 Pin2=3.3V, U702 Pin2=1.8V Replace U701, U702 X401 oscillate waveforms are normal Replace X401...
  • Page 49 24” LCD Color Monitor BenQ E2400HD (3) White screen White Screen Measure Q703 base X401 oscillate is low level? waveform is normal Replace X401 Check Q702, Q703 is broken Check U401 or CN701 solder? Replace U401 Check Correspondent Check reset circuit of component.
  • Page 50 24” LCD Color Monitor BenQ E2400HD Power Board No power Check CN902 PIN5.6 = 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...
  • Page 51 24” LCD Color Monitor BenQ E2400HD W / LED, No Backlight Check Inverter input =12V Check adapter and F801 Check ON/OFF signal Check Interface board or main board Check U801 PIN 11=5V Change ON/OFF circuit Check U801 PIN8/PIN9 PWM wave...
  • Page 52 24” LCD Color Monitor BenQ E2400HD 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...

  • Page 53: Pcb Layout

    24” LCD Color Monitor BenQ E2400HD PCB LAYOUT Main Board...
  • Page 54 24” LCD Color Monitor BenQ E2400HD Power Board...
  • Page 55 24” LCD Color Monitor BenQ E2400HD...

  • Page 56: Appendix - Screw List / Torque

    24” LCD Color Monitor BenQ E2400HD Appendix – Screw List / Torque (TKRAA2NBW2BQDN/ TKRAA2NDW2BQDN) Part No. Type Description Quantity Torque 0M1G 130 6120 M3*6 FOR MAIN FRAME & PANEL 3±0.5KGF. CM 0M1G 930 6120 M3*6 For HDMI CONNECTOR & MAIN FRAME 6±1 KGF.

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