BenQ MK2432 Product Service Manual
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BenQ MK2432 Product Service Manual

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Applicable Country & Regions:
Taiwan
Product Service Manual – Level 2
Service Manual for BenQ:
Monitor-TV /MK2432
<9H.V0H75.JCT>
Version: 00a
Date: 2009/08/31
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 2009)
© Copyright BenQ Corporation 2007. All Right Reserved.
1

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Summary of Contents for BenQ MK2432

  • 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 2009)

  • Page 2: Table Of Contents

    Content Index ABBREVIATIONS & ACRONYMS ......................2 ABOUT THIS MANUAL ......................... 4 INTRODUCTION ........................... 4 GENERAL DESCRIPTIONS........................5 RELATED SERVICE INFORMATION ....................5 PRODUCT OVERVIEW .......................... 5 SPECIFICATION ........................ 6 PACKING .......................... 26 CUSTOMER ACCEPTANCE .................... 28 LEVEL 1 COSMETIC / APPEARANCE / ALIGNMENT SERVICE ............. 31 VISUAL INSPECTION &...
  • Page 3 A/D Converter Analog to Digital Converter BenQ BenQ Corporation Digital Television Electromagnetic Interference HDMI High Definition Multimedia Interface NTSC National Television System Committee On Screen Display Phase Alternating Line RS232 Interface Between Data Terminal Equipment and Data Communications Equipment Employing Serial Binary...

  • Page 4: About This Manual

    This manual contains information about maintenance and service of BenQ products. Use this manual to perform diagnostics tests, troubleshoot problems, and align the BenQ product. 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 5: General Descriptions

    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 Related Service Information Service Web Site BenQ Global Service Website: http://www.benq.com/support/ eSupport Website: http://esupport.benq.com/v2 Product Overview...

  • Page 6: Specification

    TV/Monitor. The part number of the panel is CMO M236H1-L01. The native resolution of the panel is 1920 X 1080. At this resolution the monitor device can be described as WUXGA and the television can be best described as “HDTV” or Extended Definition Television. This television/monitor can be used to display high definition television images as images that are scaled to the native resolution of 1920 X 1080.
  • Page 7 right ( + ) - IR remote controller - Fancy OSD (on screen display) for user control interface - Color indicator for power on/standby (8). It is composed of the following material and accessories (Accessory might be adjusted by different territory request): -LCD TV *1 -User Manual + warranty card -A power cord...
  • Page 8 (3) Input / Output Signal Specification AC inlet (AC Power input) HDMI input (DVI 1.0 specification compatible) VGA (D-Sub-15 pin) Input Component Video (YPbPr) input Composite Video (CVBS) input S-Video input AV/ S-Video Shared audio input (RCA L / R) Component Video (YPbPr) audio input (RCA L / R) Fixed Audio Out (RCA L / R) PC Audio input for VGA / DVI...
  • Page 9 1. PC Analog Signal Signal cable : D-Sub: 15pin D-sub connector is on the captive signal cable for IBM VGA or compatible graphic adapters. The shall be 1.8 meters long.The pin assignment of this connector is described as below: D-Sub Connector Green Blue Red GND...
  • Page 10 Signal Timing: Resolution Horizontal Vertical Pixel Mode Plus Frequency Frequency Frequency Frequency (kHz) (Hz) (MHz) IBM, VGA 720x400@70Hz 31.469 70.080 28.320 640x480@60 Hz 31.469 59.940 25.175 640x480@72 Hz 37.861 72.809 31.500 640x480@75 Hz 37.500 75.000 31.500 800x600@56Hz 35.156 56.250 36.000 800x600@60Hz 37.879 60.317...
  • Page 11 (2) Component audio pin define: (A) Audio Input, right channel, for YCrCb or YprPb (B) Audio Input, left channel, for YCrCb or YPrPb Signal Level: (1) YPbPr input: Component signal: 0.7~1Vp-p/75 Ohm, negative (2) Audio: Level: 500 mVrms Impedance: 600 ohms Signal support timing: Input from YcbCr: Lines per frame...
  • Page 12 Earphone output: Headphone impedance = 32 ohm Output level 150mV 4. Output Source: The audio from the displayed program (TV or any AVs) is permanently Left & Right outputs, for connecting an external amplifier. The output level is either fixed or variable according to the volume same signal as screen output.
  • Page 13 Signal Level: Digital (DVI-D) applicable HDMI / DVI Video Signal support timing: Video signal PC signal 480i 720x400@70Hz (IBM, VGA) 480p 640x480 @ 60Hz (VESA) 720p 640x480 @ 67Hz (MAC) 1080i 640x480 @ 72Hz (VESA) 1080p 640x480 @ 75Hz (VESA) 800x600 @ 56Hz (VESA) 800x600 @ 60Hz (VESA) 800x600 @ 72Hz (VESA)
  • Page 14 7. Output Functional specification ll the tests to verify specifications in this section must be performed under the following standard conditions unless otherwise noted. The standard conditions are: -Temperature: 15- 25degree Celsius -AC line input voltage: 110~240VAC -Checking display mode: All the presenting modes. -Warm-up time: 30 minutes minimum 8.
  • Page 15 (4) LCD Module Inspection:...
  • Page 19 3. Classification Table of defects: 4. Backlight Characteristics: Item UNIT Note Lamp Input voltage 1034 VRMS Lamp current mARMS Operating frequency Lamp Starting Voltage 1900 VRMS 0°C 1500 VRMS 25°C Operating life 50,000 5. Inverter Interface Characteristics: Item UNIT Note Power consumption 26.32 Input Voltage...
  • Page 20 (5) Audio Spec Parameter Specification Base band Input Power Output Max Rating 5W at 10% T.H.D Distortion Speaker Impedance main spk :8 Ω 500 mV rms (Typ) 1.6 V rms (Max) Line In Impedance: 600 ohms 500 mVrms +/- 10% Line Out @1K Hz tone (with +/-25k Hz deviation at input, volume with non-attenuation and loading with 47k Ohm)
  • Page 21 (7) OSD Control flow Picture effect selections on Dynamic (default), Standard, Picture Mode Cinema, Personal Brightness Adjust the Black levels (0~100) Contrast Adjust the White levels (0~100) Color Adjust the Color levels (0~100) Adjust the Tint levels (-50~ 0~ + 50) Sharpness Adjust the Sharpness levels (0~100) Picture...
  • Page 22 TV/CATV Selections TV sources to TV or CATV (default) Channel Skip To Add or Skip TV channels Favorite Add or delete favorite channel Channel Auto Scan Auto Search TV programs Black and white levels for video components shall be either “Full Range” or “Limited Range.
  • Page 23 (8) Remote Controller The remote control is a standard accessory packed with the LCDTV set. The communication between remote control and receiver on LCDTV set is commonly by the emitting and receiving of infrared signals.
  • Page 24 Remote control button function is as following: Power On/Off 電源 Press to select the desired audio if multi-sound (Stereo, Sap and/ or 雙語 Mono) was broadcasted Display informations for current source 資訊 Set TV Sleep timer 定時關機 Sound effect selections on Classical (default), Pop, Jazz, Rock, 音場效果...
  • Page 25 (9) Maintainability Specifications 1. General & Requirements (1) Main Board ASSY (2) Keypad Board ASSY (3) IR Board ASSY (4) Power Board ASSY 2. Mean Time to Repair 2.1 Module Level: Less than 20 minutes 2.2 Component Level: Less than 20 minutes 3.

  • Page 26: Packing

    Packing Marking & Labels...

  • Page 28: Customer Acceptance

    Note: If BenQ defect undefined failure, and it judged that is reduce the merchandise ability, BenQ CM Inform this defect. After that parties make communication and decide how to solve.
  • Page 29 6.0 CLASSIFICATION OF DEFECTIVES A defective is a product, which contains one or more defects. The defective will be classified into following classes: Critical defective A critical defective contains one or more critical and may also contain major and/or minor defects.
  • Page 30 10.0 TEST CONDITIONS Unless otherwise prescribed, the test conditions are as follows: 11.0 TEST EQUIPMENTS 11.1 BenQ PCs with BenQ display adapter or other specific display adapter, which is agreed upon by both parties 11.2 Test program by BENQ 11.3 Power saving test tool 11.4 Minolta color analyzer...

  • Page 31: Level 1 Cosmetic / Appearance / Alignment Service

    Level 1 Cosmetic / Appearance / Alignment Service Visual Inspection & Cleaning 1.0 Inspection distance for different zone: and timing to inspect Zone A: Front view of the bezel. Zone B: a) Top view and right view of the bezel. b) Front view of base stand. Zone C: Other areas can be defined as zone C.
  • Page 32 1.1 Appearance Inspection Criteria Spot A 級面 (A surface ) B 級面 (A surface ) C 級面 (A surface ) 規格 (Spec) 面積 cm2 允許數 (Number of defect) 允許數 (Number of defect) 允許數 (Number of defect) ( Area cm2 ) 22”...
  • Page 33 Scratch 刮伤 每個檢查面允許缺點數 刮傷(Scratch): Defects of specified area 兩 不 良 點 間 允 許最小距離 ≦10*10 cm ≦50*50 cm ≦70*70 cm ≦100*100 cm >100*100 cm 區域 寬 / 長 Zone Width / Length Minimum >10000 cm ≦2500 cm ≦4900 cm ≦10000 cm ≦100cm distance...
  • Page 34  Color variance (under the D65 light source) 噴漆(Painting): ΔE<1.0 銀粉漆 (Paint, aluminum). ΔE<1.0 非銀粉漆(Paint, non-aluminum)素材(Raw material) : ΔE<1.0 Description Class Packing 1.1 Wrong packing material Major 1.2 Carton damaged (3cm to 6cm dia) Minor 1.3 Carton damaged (Over 6cm dia ) Major 1.4 Carton printing wrong Major...
  • Page 35 OPERATIONAL INSPECTION CRITERIA 1. 0 TEST PATTERN PATTERN TEST ITEM FULL WHITE 1. chroma23291 input5 dot picture, adjust the Brightness &contrast to MAX, Test 5dots Brightness 2. chroma23291 input Full white picture, measure the brightness at the center of the picture FULL R, G, B, Window pattern Chroma23291input R/G/B/Window video,...
  • Page 36 1. 1. Test content Test Condition TEST ITEM Input Equipment EDID ‘s software Check EDID Adjust volume from min to max, PC sound check PC& adjust Balance D-SUB Chroma23291 PC Mode 1.check video or Chroma2329 Audio Follow Engineering spec ‘s timing normal or MIK K-8257 2.check noise...
  • Page 37 1.2. Specification: Item Pattern Condition Specification Contrast: Default H -Resolution Mono scope ≧280 Brightness: Default Contrast: Default V -Resolution Mono scope ≧350 Brightness: Default Contrast: Default H -Size Mono scope 90%≦H-size<100% Brightness: Default Contrast: Default V -Size Mono scope 90%≦H-size<100% Brightness: Default Contrast: Max 500cd/m2 (Typical)
  • Page 38 INSPECTION CRITERIA 1.0 Panel electrical inspection specification: Inspection Item Specification 1 Line defect Can’t be seen. Bright dot ≦3 dots 2 Random dot defect 2 dots adjacent </=1 Random </=5 dots 2 dots adjacent </=2 3. Dark dot 3 dots adjacent </=0 Minimum Distance Between Dark dots L >/=5mm Total bright and dark dot N</=5...

  • Page 39: Software/Firmware Upgrade Process

    Software/Firmware Upgrade Process How to enter Factory OSD 1. Please press keypad to enter Factory Mode. 2. Press “Enter” key + “Up” key together and then press “Power” key to enter Factory Mode 3. Confirm software version...
  • Page 40 Software download procedure The ISP SOP FOR MST 1. Connection PC to the Tv set by the tool as the follow picture (Fig.1~4) Action: The D_SUB cable must be 15 pin, and the TV set must be AC ON Fig.1 Fig.2...
  • Page 41 Fig.3 Fig.4...
  • Page 42 1: Installation Driver Fig.1 Press the “next” button to continue. Fig.2...
  • Page 43 Fig.3 Now press the “确定“button. Fig.4 Press the “close”,the driver installation ok.
  • Page 44 2. Start the Isp 1. Open the “ISP_Tool_410_T.exe” Press the “config”, if the the ISP board have been found, you will see the picture as bellow. Fig.5 3. Press the “Connect”, if all the things are ok and ready, it will show the device type as the bellow picture.
  • Page 45 4. Press “read” and choose the right F/W . Fig.7 5. Press “Auto”, than press “Run”. It will start ISP . When the ISP is ok ,you will see the information as the bellow picture. Fig.8 6. Pull away the AC power Cord and the D-SUB Cable. And start another TV set. 7.

  • Page 46: Adjustment / Alignment Procedure

    Adjustment / Alignment Procedure 1. Preparation: 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 3. ESD protection is needed before adjustment. 2.
  • Page 47 4. YPbPr MODE Color Temperature adjusting : A. Timing: 1920X1080@60Hz. B. Pattern: COLOR BAR. C. Set CA210 color analizer at the center of screen and along a perpendicular to the screen near the display. In the factory mode select the “SOURCE” item, then select :YPbPr E.
  • Page 48 8. YPbPr, S-VIDEO, AV, TV, FUNCTION TEST A. Input YPbPr, S-VIDEO, AV , TV, signal and check. B. Input PAL D/K air channel (TABLE 1) for TV channel. C. Under YPbPr MODE, Make sure the 480i, 480P, 720P, 1080i ,1080p is right. 9.

  • Page 49: Level 2 Circuit Board And Standard Rarts Replacement

    Level 2 Circuit Board and Standard Parts Replacement Exploded View...
  • Page 50 EXPLODED VIEW PARTS LIST Ref. No. Source DESCRIPTION SPECIFICATION Q‘TY REMARK JC240B ABS 94HB G.L BLACK C FOR BENQ(HDMI 1F01 FRONT BEZEL HDTV)(MK2432) 1F02 LED INDIC.-PWR JC236B UT-0520T COLOR T57015 1F03 IR COVER JC236B PC GE-121R-21051 1F04 FUNCTION KEY JC229A ABS 94HB BLACK C...

  • Page 51: Disassembly / Assembly

    Disassembly / Assembly Disassembly of Stand from LCD TV. 1.1 Unscrew 4 screws to move Stand Unit and Dust Cover. Stand Dust Cover 2. Disassembly of Rear Cover. 2.1 Unscrew 10 screws in the Rear Cover.
  • Page 52 2.2 Prize the rectangle hole on Rear Cover (Fig.1) with a screwdriver (Fig.2) to make the Rear Cover detach from the LCD TV. Fig.1 Fig.2 Rear Cover...
  • Page 53 Disassembly of Main Board, Power Board, Front Cover and Panel Unit. 3.1. Unscrew 2 screws to remove Bracket fix. Bracket fix 3.2. Unscrew 8 screws to move Speaker and KeyPad Board .
  • Page 54 KeyPad Board Speaker 3.3. Unscrew screws 6 to move Shield Plate . Shield Plate 3.4. Unscrew 4 screws to remove Front Cover. Front Cover...
  • Page 55 3.5. Unscrew 4 screws and disconnect the wires to remove Main Board. Main Board 3.6. Unscrew 6screws and disconnect the wires to remove Power Board. Power Board...
  • Page 56 3.7. Unscrew 4 crews to move Panel Bracket . Panel Bracket...

  • Page 57: System Block Diagram

    System Block Diagram The LCD TV uses 1920x1080 LCD Panel to display image. This LCD TV can accept the following input sources: (1) HDMI connector (2) D-SUB connector (3) PC audio (4) Component (5) S-Video (6) Composite (7) Audio In*2 (L/R) (8) Audio Out (L/R) (9) Earphone (10) TV Tuner...

  • Page 58: Troubleshooting

    Troubleshooting...
  • Page 59 NO display...

  • Page 60: Appendix 1- Screw List/Torque

    Appendix 1 – Screw List /Torque TORQUE ITEM DESCRIPTION SPECIFICATION Q‘TY WHERE USE Q‘TY (KG-CM) ISZZTER001A M3*6L 5~6Kgf/cm Power board to metal fittg MSWR17/FZMYI ISZZTER001A M3*6L 5~6Kgf/cm Ground plate to metal fittg MSWR17/FZMYI SCREW SPE ISZZTER001A M3*6L 5~7Kgf/cm mainboard to metal fittg MSWR17/FZMYI ISZZTER001A M3*6L 5~6Kgf/cm...

  • Page 61: Appendix 2 -Ir Code

    Appendix 2 –IR Code Code format: RC5 Customer Code: 3010 System Code: 00...

  • Page 62: Appendix 3- Wall Mount

    Appendix 3 – Wall Mount Dimension Scale: 1:1 Unit: mm...

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