BenQ G700 Service Manual
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BenQ G700 Service Manual

Benq monitor
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BenQ G700
Service Manual
Product Service Manual – Level 2
Service Manual for BenQ:
G700
P/N: 9J.0BV72.ISx/IBx
Applicable for All Regions
Version: 001
Date:07/06/12
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 (June, 2006)
© Copyright BenQ Corporation 2006. All Right Reserved.
1

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Summary of Contents for BenQ G700

  • Page 1 - 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 (June, 2006)

  • Page 2: Table Of Contents

    BenQ G700 Service Manual Content Index 1. Precautions & Safety Notices........................4 1.1 .Safety Precaution…………………………………………………………………………………………………4 1.2 Produce Safety Notice…………………………………………………………………………………………… 4 1.3 Service Notes………………………………………………………………………………………………………4 2. Product Overview………………………………………………………………………………………………… 4 2.1. Power supply………………………………………………………………………………………………………4 2.2 Signal interface……………………………………………………………………………………………………. 5 2.3 Video performance………………………………………………………………………………………………….5 2.4 Scan range…………………………………………………………………………………………………………..6 2.5 Plug & Play DDC2B DDC-CI Support…………………………………………………………………………… 6 2.6 Support Timings…………………………………………………………………………………………………….
  • Page 3 BenQ G700 Service Manual Content Index 4.1 Software / Firmware Upgrade Process…………………………………………………………………………..20 4.2. Alignment procedure (for function adjustment)……………………………………………………………….. 21 4.2.1 Preparation………………………………………………………………………………………………………. 21 4.2.2 Timing adjustment………………………………………………………………………………………………. 21 4.2.3 Function key Definitions………………………………………………………………………………………… 21 4.2.3.1 Control buttons on the Back bezel……………………………………………………………………………21 4.2.3.2 OSD Control…………………………………………………………………………………………………… 22 4.2.3.3 Factory Mode Introduction……………………………………………………………………………………...

  • Page 4: Precautions & Safety Notices

    BenQ G700 Service Manual 1. Precautions & Safety Notices 1.1 Safety Precaution This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user.

  • Page 5: Signal Interface

    BenQ G700 Service Manual 240Vac,cold 60A(max) star,25°C Earth Leakage Current Hi-pot Power Line Transient CCFL Operation range √ Power cord To be determined by the business country. 2.2 Signal interface Symbol Symbol Symbol Red+ Red_GND Green+ Green_GND DDC_DAT Blue+ Blue_GND...

  • Page 6: Scan Range

    BenQ G700 Service Manual 2.4 Scan range Item condition Spec Remark √ Horizontal Sync polarity: (+) or (-) 31.0~83KHz √ Vertical Sync polarity: (+) or (-) 56~76Hz 2.5 Plug & Play DDC2B DDC-CI Support Item condition Spec Remark √ DDC channel type DDC2B √...

  • Page 7: Service Manual

    BenQ G700 Service Manual Preset Pixel Format Horz Freq(kHz) Horz Polarity Vert Freq (Hz) Vert Polarity Pixel Clk (MHz) 31.47 70.09 25.18 640x350 31.47 25.18 640x400 70.09 35.00 66.67 30.24 640x480 31.47 59.94 25.17 640x480 37.86 72.81 31.50 640x480 37.50 75.00...

  • Page 8: Operational &Function Specification

    BenQ G700 Service Manual Preset Pixel Format Horz Freq(kHz) Horz Polarity Vert Freq (Hz) Vert Polarity Pixel Clk (MHz) 60.29 74.89 102.25 1280x768 61.648 59.81 83.50 1280x800 62.8 106.5 1280x800 60.00 60.00 108.00 1280x960 63.98 60.02 108.00 1280x1024 74.88 69.85 126.99...

  • Page 9: Brightness Adjustable Range

    BenQ G700 Service Manual 2.7.2 Brightness Adjustable Range Item condition Spec Remark ≧100 cd/m √ Brightness adjustable range At default contrast level (Setting (saturate brightness max. point)& value 100%; Min. Full-white color brightness value) pattern 2.7.3 Acoustical Noise Item condition...

  • Page 10: Electrostatic Discharge Requirements

    BenQ G700 Service Manual 2.7.6 Electrostatic discharge Requirements Item condition Spec Remark Contact √ Electrostatic discharge IEC61000-4-2(EN discharge : 4KV 55024) 2.7.7 Reliability Items Condition Spec Note Excluding the ≧ 50,000 Hours MTBF LCD, CCFL CCFL Life time Luminance becomes 50% ≧...

  • Page 11: User Controls

    BenQ G700 Service Manual 2.9 User Controls User’s hardware control definition: Item condition Spec Remark √ Monitor power button √ Enter button √ Right/Inc.button √ Left/Dec. button √ I-key button √ Mode selection button √ Input Select key √ Mute button √...

  • Page 12: Carton

    BenQ G700 Service Manual √ Texture MT11000&MT11010&MT11 1.BEZEL: MT11000 & 020& & polishing2000& MT11010& polishing3000& polishing2000 polishing6000 2.BACK COVER: Special Texture MT11000 & MT11020& polishing2000 3.STAND: MT11010& polishing2000 4.POWER KEY BUTTON: polishing2000 5.LED: polishing6000 Others:MT11020 √ Color BCS-7015A(BLACK)/BCS- T8110C(SILVER) Bezel painting 2.10.4 Carton...

  • Page 13: Carton Specification Product: /Package

    BenQ G700 Service Manual Without Pallet 40’ 2.11.2 Carton Specification Product: Net Weight (Kg) Gross Weight(Kg) Dimension w/o Base Dimension w/ Base LxWxH (mm) LxWxH (mm) 3.7±0.3 Kg ( Net) 4.7±0.3Kg 370x365.9x93.7mm 370x371.35x137.91mm Package: Carton Interior Dimension (mm) Carton External Dimension (mm)

  • Page 14: Disassembly & Assembly

    BenQ G700 Service Manual 3. Disassembly & Assembly 3.1 Exploded Diagram...

  • Page 15: Assembly Block

    BenQ G700 Service Manual 3.2 Assembly Block ASSY CHASSIS PCBA I/F BOARD *1 PCBA Power *1 SCREW,P,CROSS W/WAS,M3*6,Zn CHASSIS SCREW, P, CROSS ROHS *1 PANEL *1 HRN LVDS FFC *1 FOIL,AI,DOUBLE,COND,60x35xT0.07mm,LE2 016*1 BEZEL *1 PCBA KEY PAD*1 FUNCTION BUTTON ASSY BEZEL *1...
  • Page 16 BenQ G700 Service Manual Assemble the panel with front-bezel Assemble chassis & Plug in the LVDS Keypad assembly Plug in the lamp lines Back cover assembly...
  • Page 17 BenQ G700 Service Manual Assemble the stand Lock screw Base assembly...

  • Page 18: Disassembly Block

    BenQ G700 Service Manual 3.3 Disassembly Block LE 1785 LCD Monitor BASE, LE1785*1 ASSY BASE Rubber Foot , *5 STAND FRONT *1 ASSY STAND STAND BACK *1 HINGE *1 BACK COVER *! ASSY,BACK COVER *1 SCREW,B,CROSS,T.T-4*10,BLK ,ROHS LOGO BACK *1 SCREW,P,CROSS,M4*8,BLACK,N L(NYLOK）*2...
  • Page 19 BenQ G700 Service Manual Disassemble the base(press two points as photo showing) Disassemble the stand(take out screw) Move out the stand Disassemble back cover Move out LVDS...

  • Page 20: Level 1 Cosmetic / Appearance / Alignment Service

    BenQ G700 Service Manual Take out screw and disassemble keypad Disassemble the LVDS Take apart the chassis aside 4 Level 1 Cosmetic / Appearance / Alignment Service 4.1 Software / Firmware Upgrade Process Upload firmware to MCU via VGA Cable 1.

  • Page 21: Alignment Procedure (For Function Adjustment)

    BenQ G700 Service Manual corresponding firmware version, and load to MCU. 3. After finish, please plug out power cable and re-start monitor again. 4.2 Alignment procedure (for function adjustment) 4.2.1 Preparation: 1. Setup input timing VESA to 1280*1024@60Hz,32-Grays pattern. 2. Setup units and keep it warm up for at least 30 minutes.

  • Page 22: Osd Control

    BenQ G700 Service Manual Change the source input “POWER” • Turn on/off the monitor 4.2.3.2 OSD Control The On-Screen Display (OSD) shall be an easy to use icon based menu through keypad OSD buttons or remote control unit. The unit shall leave the factory with all OSD controls set to their default values...

  • Page 23: Factory Mode Introduction

    BenQ G700 Service Manual Input (D-sub/DVI) -EU version: 14 languages (English/Français/Deutsch/Italiano/Espanol/Poli sh/Czech/Hungarian/Serbo-croatian/Romanian/ SYSTEM Netherlands/Russian/Swedish/Protuguese) OSD Settings Language English -Asian version: 8 languages (English/Francais/Deutsch/Italiano/Espanol/日 本語/繁體 中文/简体中文) H. Position (0~100) V. Position (0~100) OSD Settings Display Time (5, 10, 15, 20, 25, 30)
  • Page 24 BenQ G700 Service Manual Contrast 1. Set input mode to 1280×1024@60Hz Chroma Check 2. Set Pattern to 32 gray shades Signal Generator 3. Set contrast to the max. The brightest 5~8 shades brightness cannot be distinguished. Color 1. Do “Auto color Balance” at 1280×1024@60Hz, 32gray...

  • Page 25: Level 2 Circuit Board And Standard Parts Replacement

    BenQ G700 Service Manual 5. Level 2 Circuit Board and Standard Parts Replacement 5.1. Block diagram Power Board C820 2200P Y1 C802 R802 1n 500V C805 ZD802 R804 T801 100u 450V P6KE200A 68R 1/2W 400V TRF-EI28 L802 5uH 5A +14V...
  • Page 26 BenQ G700 Service Manual IF Board...
  • Page 27 BenQ G700 Service Manual...

  • Page 28: Circuit Operation Theory

    BenQ G700 Service Manual 5.2 Circuit operation theory 5.2.1. Electronic Circuit Theory Switching Mode Power Supply theory 2.1.1 AC Current Input Circuit P801 is a connector for connecting AC Power. F801 is a fuse to protect all the circuit. AC input voltage is from 90V to 264V.
  • Page 29 BenQ G700 Service Manual the soft-start, the high voltage current source is turned off and the CONTROL pin will start discharging in response to the supply current drawn by the control circuitry. Resistor R803, R807, R824 and R825 are for line over voltage shut-down (OVP) and line under-voltage detection (UVP).Resistors R801, R805, R822, and R823 are for external current limit adjustment, and...

  • Page 30: Power Board Diagram

    BenQ G700 Service Manual dimming frequency is determined by the external resistor R507 and capacitor C516 connected to pin11 of IC501. C511 is used for soft start and compensation, C507, C518 are used for dump noise. The output drives, include DRV1, DRV2 (pins1,15 respectively) output square pulses to drive MOSFET U501, U502, and each of U501, U502 , is consist of a N channel MOSFET.

  • Page 31: Inverter Board Diagram

    BenQ G700 Service Manual 5.3 Inverter board diagram: Vcc+14v Lamp1 PWM CONTROL 50KHz Transformer Switch(MOSFET) PWM1 (OZ9938GN) Lamp2 50KHz PWM2 Brightnes ON/OFF Transformer2 50KHz Lamp3 Switch(MOSFET) 50KHz Lamp4 Open protection Lamp1 Lamp2 Lamp3 Lamp3 PUSH-PULL INVERTER 5.3.1 I/F Circuit 5.3.1.1 RGB CAPTURE...
  • Page 32 BenQ G700 Service Manual into U103#24. - U108 power is supplied by PC via CN103#9, or supplied by Monitor self via D103. - U108 is an EEPROM IC which is memory and EDID data saved in it. 5.3.1.2 Buttons Control - Button “Power”...

  • Page 33: Trouble Shooting Guide

    BenQ G700 Service Manual 5.3.2 Trouble Shooting Guide Inverter trouble shooting 1. Backlight can’t be turned on No raster? LED Blue? Backlight can’t be turned on. Is there 5Vdc Check power supply voltage on pin2 Is there high-level voltage Is Ok R501?
  • Page 34 BenQ G700 Service Manual 2. No power & Power LED Off Power trouble shooting_1 No power Check IC802, Check circuit Check primary C805, T801 if short rectifier voltage Check F801, P801, D801 Check pin3 of Check R801, R805, IC802 voltage...
  • Page 35 BenQ G700 Service Manual Power trouble shooting_2 Output voltage unstable Check ZD801, ZD802, Check circuit if Check Vbe of ZD803, D803, D805 short Q801 below 0 3V Check Q801, Q802 Check R809, R814, Check Pin R of Check reference IC801, R818...
  • Page 36 BenQ G700 Service Manual Power trouble shooting_3 Unstable power Check sampling Check R810, Circuit R811, R818 Change R810, R811, Check the R pin Check the C pin Change IC803 voltage of IC803 voltage of IC803 Check R809, R808, R814, Check D806, C815 if...
  • Page 37 BenQ G700 Service Manual Black Screen Black Screen Check VCC Power Fail Check VCC3.3V Check U102 and VCC1.8V Check Reset Check Waveform Check Crystal pin Check waveform Check CCFL Check Inverter fail Enable pin10 of Check R102,R101,R104, U103 fail and Q101...
  • Page 38 BenQ G700 Service Manual White Screen White Screen Workmanship LVDS cable reinsert Change LVDS cable NG LVDS Check Check Panel Fail VLCD VLCD Check panel Enable of Panel Check CN105 Check Q112,Q110...
  • Page 39 BenQ G700 Service Manual Bad Screen Bad Screen LVDS cables Workmanship reinsert Change LVDS cable Check crystal: Check X1, C117 pin 15 and and C118 pin16 Check U106...

  • Page 40: Spare Parts List

    BenQ G700 Service Manual 5.4 Spare Parts List * THIS PARTS LIST MAY BE SUBJECT TO CHANGE WITH PRIOR NOTICE BY SPM OF BENQ CC TEAM. Site Innolux Released Date 23-Jul-07 Ship To Area 99 Part Number Description EU, VN 9H.0BVLN.ISE...
  • Page 41 BenQ G700 Service Manual...

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