BenQ VJ3212 Service Manual
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BenQ VJ3212 Service Manual

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Applicable Country & Regions:
Taiwan
Product Service Manual – Level 2
Service Manual for BenQ:
LCD-TV/VJ3212
<9H.0DQ75.000>
Version: 00a
Date:2008/12/24
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 (Dec, 2008)
© Copyright BenQ Corporation 2007. All Right Reserved.
1

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Summary of Contents for BenQ VJ3212

  • 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 (Dec, 2008)

  • Page 2: Table Of Contents

    Content Index ABBREVIATIONS & ACRONYMS ......................3 ABOUT THIS MANUAL ......................... 4 INTRODUCTION ........................... 4 GENERAL DESCRIPTIONS........................5 RELATED SERVICE INFORMATION ....................5 PRODUCT OVERVIEW .......................... 6 SPECIFICATION ........................6 PACKAGING ........................23 CUSTOMER ACCEPTANCE ....................25 LEVEL 1 COSMETIC / APPEARANCE / ALIGNMENT SERVICE ............. 28 VISUAL INSPECTION &...

  • Page 3: Abbreviations & Acronyms

    Abbreviations & Acronyms 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...

  • Page 4: About This Manual

    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.

  • 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...

  • Page 6: Product Overview

    Product Overview This specification describes a 32" diagonal LCD TV with aspect ratio of 16:9 which supports up to 1366 x 768 format and can display true 16.7M colors . This LCD TV is very thin and completely free from electromagnetic distortion. So you can install it just about any place. You can simply place it on a table, hang it on the wall.
  • Page 7 (7) User interface: - User controls: on/off switch, key pad with input select, menu, channel up, channel down, left( - ), 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 x 1...
  • Page 8 Assembly Specification ITEMS Specification Gap LCD Panel/bezel 2.1mm Gap front/rear cover 1.0mm (3) Input / Output Signal Specification (D) (E)(F)(G) (H)(I) (J) (A) Power AC input. (B) HDMI signal input. (C) VGA signal input. (D) Component Video (HD) Y Pb/Cb Pr/Cr. (E) S-Video Input (mini Din 4 pin).
  • 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 Horizontal Vertical Pixel Mode Resolution Frequency Frequency Frequency (kHz) (Hz) (MHz) 640x480@60 Hz 31.469 59.940 25.175 640x480@72 Hz 37.861 72.809 31.500 640x480@75Hz 37.500 75.000 31.500 800x600@56Hz 35.156 56.250 36.000 800x600@60Hz 37.879 60.317 40.000 SVGA 800x600@72Hz 48.077 72.188 50.000 800x600@75Hz 46.875 75.000...
  • Page 11 1. Component Video Signal: Connector Pin definition: (1) Component video pin define: (A) Cr/Pr Input (B) Cb/Pb Input (C) Y Input for YCrCb or YPrPb. (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:...
  • Page 12 2. Audio input level Audio monitor output Signal: Input level Source Input Audio Out ( mVrms) HDMI (DVI)HDMI YPbPr YPbPr Earphone output: 3. Output Source: The audio from the displayed program (TV or any AVs) is permanently Left & Right outputs, for connecting an external amplifier.
  • Page 13 Signal Level: Digital (DVI-D) applicable HDMI / DVI Video Signal support timing: Video Signal Timings PC Signal Timings HD 480i 640 x 480 @ 60Hz HD 480p 640 x 480 @ 75Hz HD 576i 800 x 600 @ 60Hz HD 576p 800 x 600 @ 75Hz HD 720p 1024 x 768 @ 60Hz...
  • Page 14 7. Display Quality Display Performance: (4) LCD Module Inspection: 1. Description These inspection standards shall be applied to LCD Module supplied by CHI MEI OpToelectronics Corporation. 2. The environmental condition of inspection The environmental condition and visual inspection shall be conducted as below. (1) Ambient temperature: 15~25℃...
  • Page 15 3. Classification of defects The defects are classified as major and minor defects. The definitions of defects are described as below. (1) Major defect The defect may cause the functional failure, or reduce the usability of the product for its purpose. For example: electrical failure, deformation etc.
  • Page 16 (2) Display Defect Item Standard Random ≦ 2 dots adjacent Bright dot ≦ 3 dots adjacent or more ≦ Random ≦ 2 dots adjacent ≦ Dark dot 3 dots adjacent or more ≦ Minimum Distance Between Dark dots L 5mm ≧...
  • Page 17 5. Classification Table of defects Inspection Item Description Defect type Vertical line Abnormal line appears in vertical direction Major Horizontal line Abnormal line appears in horizontal direction Major Cross line Abnormal cross line appears in display Major No display No signal outputs in display Major Irregular display Abnormal signal outputs in display...
  • Page 18 (5) Audio Spec Parameter Specification Base band Input Power Output Max Rating 10W at 10% T.H.D Distortion Speaker Impedance main spk :6 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 19 (7) OSD Control flow TV/ YPBPR/ AV / S-Video/ HDMI Picture Picture Mode To select the preset Picture Mode or Personal Mode setting. Contrast To adjust the contrast level. (Must choose " Personal " mode) Brightness To adjust the brightness level (Must choose " Personal " mode) Colour To adjust the Colour level.
  • Page 20 D-Sub Auto adjust Auto adjust the picture Contrast Adjust the Black levels from 0 to 100 Brightness Adjust the White levels from 0 to 100 H. Position Adjust the Horizontal Position of viewable area : levels from 0 to 100 (only VGA) V.
  • Page 21 (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 22 Remote control button function is as following: POWER button Power ON/OFF INPUT button INPUT source select ECO Mode Unsupported this Function Screen Information Source and channel display SLEEP Timer Sleep time setting Bilingual MTS select Video Effect Picture mode select Sound Effect EQ Mode select Teletext MIX...

  • Page 23: Packaging

    3. Equipment & Tools Required 3.1 Standard Test Equipment: Test Equipment Manufacturer/ Model # /Version Video Signal Generator CHROMA 2135 Pattern Generator, Fluke 54200 Panasonic Audio Analyzer VP-7723A, Fluke 54200 Audio Signal Generator RF Signal Generator Fluke 54200 Head Phone Sony Mini-Plug Headset DVD Player SAMPO DVD Player DV-F46...
  • Page 24 Marking Labels...

  • Page 25: 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 26 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 27 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 28: 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.
  • Page 29 1.1 Appearance Inspection Criteria Spot 規格 (Spec) A 級面 (A surface ) B 級面 (A surface ) C 級面 (A surface ) 允許數 (Number of defect) 允許數 (Number of defect) 允許數 (Number of defect) 面積 cm ( Area cm 27”~32” 27”~32”...
  • Page 30 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 ≦10*10 cm ≦50*50 cm ≦70*70 cm ≦100*100 cm >100*100 cm 許最小距離 區域 寬 / 長 Minimum Zone Width / Length >10000 cm ≦100cm ≦2500 cm ≦4900 cm ≦10000 cm distance Of two points...
  • Page 31 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 Wrong packing material Major Carton damaged (3cm to 6cm dia) Minor Carton damaged (Over 6cm dia ) Major Carton printing wrong Major Carton Dirty and dusty.
  • Page 32 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, check dots and picture noise...
  • Page 33 1.1. Test content Test Condition TEST ITEM Input Equipment EDID ‘s software Check EDID PC& Adjust volume from min to max, adjust Chroma23291 PC sound check Balance D-SUB PC Mode PC Audio Chroma2329 1.check if video is normal Follow Engineering spec ‘s timing 2.check noise MIK K-8257 Full W , R, G, B...
  • Page 34 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/m...
  • Page 35 1.3. OPERATIONAL INSPECTION CRITERIA: Description Class Display H/V size over specification Major Display H/V –Resolution over specification Major Video noise Major Operating frequency out of spec, out of range Major OSD wrong words, OSD function fail Major Color temperature out of spec(Refer to Engineering Spec) Major No power, no video, LED does not illuminate Major...
  • Page 36 INSPECTION CRITERIA 1.0 Panel electrical inspection specification: Inspection Item Specification 1 Line defect Can’t be seen. 2 Random dot defect Bright dot ≦ 2 dots Random </= 7 dots 2 dots adjacent </=2 3 Dark dot 3 dots adjacent </=0 Minimum Distance Between Dark dots L >/=5mm 4 Total bright and dark dot N</=7...

  • Page 37: Software/Firmware Upgrade Process

    Software/Firmware Upgrade Process How to enter Factory Mode 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 38 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 39 Fig.3 Fig.4...
  • Page 40 1: Installation Driver Fig.1 Press the “next” button to continue. Fig.2...
  • Page 41 Fig.3 Now press the “確定“button. Fig.4 Press the “close”,the driver installation ok.
  • Page 42 2. Start the Isp 1. Open the “ISP_Tool_410_T.exe” 2. 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 43 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 44: 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 45 4. HD MODE Color Temperature adjusting: A. Timing: PAL OR NTSC. B. Pattern: COLOR BAR. C. Set CA110 color analyzer at the center of screen and along a perpendicular to the screen at 20cm from the display. D. Press menu key select the OSD page on INPUT SOURCE and select: YPBPR. E.
  • Page 46 7 .OSD FUNCTION TEST A. Time: 1360x768@60Hz B. Pattern: 16*12 pane C. Make sure that Each FUNCTION has one right action. 8. YPbPr, S-VIDEO, AV, TV, DTV’S 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.

  • Page 47: Level 2 Circuit Board And Standard Rarts Replacement

    Level 2 Circuit Board and Standard Parts Replacement Exploded View...
  • Page 48 62*8*3.4 T=0.5MM WITH PVC TUBE 1F50 METAL FITTG SECC T=0.8MM VESA SUPPORT 1F52 SCREW M3*4 P=0.5 1F55 DUST COVER 32R6KEYABS HB BLACK (FOR BENQ) 1F56 FUNCTION KEY 32R 6KEY HB AL-PLATE 1F57 SCREW BND T+ M3X8(BND T+) 1F58 SCREW M3X6 P=0.5...
  • Page 49 2C17 SCREW SPE M6*10MM TYPE"I" BLACK ZN 5B04 STAND 32V HIPS+MICA BLACK 5B08 SCREW BND+ M5X40,M,P,ZN-CC 5B09 FOOT PAD Ø 20*2.5T SQUARE GRAIN BLK...

  • Page 50: Disassembly / Assembly

    Disassembly / Assembly Disassembly of Rear Cover from LCD TV. Unscrew 4 screws to remove Stand. Stand Unscrew 23 screws to remove Rear Cover. Rear Cover...
  • Page 51 2. Disassembly of Power Board, Main Board, Keypad Board, Front Cover and Panel Unit. Unscrew 2 screws to remove Dust Cover. Dust Cover Unscrew 14 screws to remove Shield Plate. Shield Plate...
  • Page 52 Unscrew 14 screws to remove METAL FITTG-I/O-Side and METAL FITTG-I/O-Down. METAL FITTG-I/O-Down METAL FITTG-I/O-Side Unscrew 4 screws and disconnect the wires to remove Power Board. Power Board...
  • Page 53 Unscrew 4 screws and disconnect the wires to remove Main Board. Main Board Unscrew 3 screws and disconnect the wires to remove Keypad Board. Key Board...
  • Page 54 Unscrew 5 screws to remove Front Cover. Front Cover Unscrew 4 screws to remove Panel Bracket. Panel Bracket...
  • Page 55 2.9. Unscrew 4 screws to remove Bracket Fix and Panel Unit. Bracket Fix Panel Unit...

  • Page 56: System Block Diagram

    System Block Diagram The LCD TV uses 1366x768 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(L/R) (8) TV Tuner (9) DTV-NA As shown in the system block diagram, there are 4 boards in the system.

  • Page 57: Troubleshooting

    Troubleshooting System Trouble Shooting Flow Chart START Check Remove p101 Replace Power P101 pin 5,6 Check 12v & 5v Board Is 12v? Check I117 Replace is working? X100,I101,I102,I103,I104 Check p113 Check wireharness pin 2 is 5v? p713 Replace IR board...
  • Page 58 Board trouble shooting flowchart Main board...
  • Page 59 Speaker trouble shooting flowchart...

  • Page 60: Appendix 1- Screw Ist/Torque

    Appendix 1 – Screw List /Torque ITEM DESCRIPTION SPECIFICATION Q‘TY TORQUE(KG-CM) WHERE USE Q‘TY Power board to panel bracket ISZZTER001AM3*6L SCREW SPE 7±1 (6~8) Kgf/cm MSWR17/FZMYI Main board to panel bracket SCREW SPE M3*8 T24 F NI 9±1(8~10)Kgf/cm Pin to I/O down SCREW SPE M6*10MM TYPE"I"...

  • Page 61: Appendix 2- Code Lis

    Appendix 2 – Code List: IR IR Code...

  • Page 62: Appendix 3- Wall Mount

    Appendix 3 – Wall Mount Dimension 比例: 1:1 單位: mm...

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9h.0dq75.000

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