BenQ GL2055 Product Service Manual
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BenQ GL2055 Product Service Manual

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Product Service Manual – Level II
Service Manual for BenQ:
GL2055
GL2055A
GL2055M
P/N: 9H.L8JLB.QP*
P/N: 9H.L8JLB.Q8*
P/N: 9H.L8KLB.QP*
Applicable for All Regions
Version: 001
Date:2012/03/16
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 (Sep., 2009)
© Copyright BenQ Corporation 2009. All Right Reserved.
- 1 -

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  • 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 (Sep., 2009) ©...

  • Page 2: Table Of Contents

    Content Index Abbreviations & Acronyms ................3 1 About This Manual ..................3 1.1. Trademark ......................3 2 Introduction ....................4 2.1. RoHS (2002/95/EC) Requirements ..............4 2.2. Safety Notice......................4 2.3. Compliance Statement ..................4 2.4. General Descriptions ................... 4 2.5.

  • Page 3: Abbreviations & Acronyms

    Abbreviations & Acronyms 1 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. 1.1. Trademark The following terms are trademarks of BenQ Corporation:...

  • Page 4: Introduction

    This Service Manual contains general information. There are 3 levels of service: Level 1: Cosmetic / Appearance / Alignment Service Level 2: Circuit Board or Standard Parts Replacement Component Repair to Circuit Boards Level 3: 2.5. Related Service Information BenQ Global Service Website: http://www.benq.com/support/ eSupport Website: http://esupport.benq.com/v2 - 4 -...

  • Page 5: Product Overview

    3.1. Specification Introduction is defined as an 20” WXGA++ 16:9 wide entry level LCD monitor. GL2055/GL2055A/GL2055M The monitor supports maximum resolution up to 1600x900. The monitor shall support the VGA and DVI (optional) with HDCP input. The features summary is shown as below, *All panel spec.
  • Page 6 Multi-language supported for OSD 17 languages 6 buttons including 1 Buttons control supported monitor power on/off control button. Flywheel control supported Scaling function supported “I-Key” function Auto adjustment function supported DDC function supported (EDID ver. 1.3) DDC2B DDC-CI support version 1.1 or later DDC-CI Audio speakers supported Only for GL2055M...
  • Page 7 3.1.7.2 Signal interface Item Condition Spec OK N.A Remark Color: Black  Length: 1800 +/- 30 15-pin D-Sub Signal Cable (GL2055 /GL2055M) Color: Black  24-pin DVI-D Length: 1800 +/- 50 15-pin D-sub See Note-1  For 15-pin D-sub connector...
  • Page 8 Note-2: The pin assignment of 24-pin DVI-D connector is as below, Signal Assignment Signal Assignment TMDS RX2- Floating TMDS RX2+ +5V Power TMDS Ground Ground Floating Hot Plug Detect Floating TMDS RX0- DDC Clock TMDS RX0+ DDC Data TMDS Ground Floating Floating TMDS RX1-...
  • Page 9 3.1.7.5 Plug & Play DDC2B DDC-CI Support Item Condition Spec OK N.A Remark  DDC channel type DDC2B Refer to FP92E S/W spec.  EDID Version 1.3 document to see the detailed EDID data definition. Refer to FP202 S/W  DDC-CI Version 1.1 or Later spec...
  • Page 10 Operational & Functional Specification 3.1.7.7 Video performance *All spec. of monitor need to warm up at least 1hr. Item Condition Spec OK N. Remark Any input resolution  Resolution modes which are under 1600x900 1600x900  Contrast ratio 700:1 (typ.) At R/G/B saturated 200 cd/m ...
  • Page 11 Color mode Color temperature Normal 6500k 0.313±0.020 0.329±0.020 Min 150cd/m Bluish 9300k 0.283±0.020 0.297±0.020 Min 120 cd/m Reddish 5800k 0.326±0.020 0.342±0.020 Min 150 cd/m User Mode Panel default color Min 150 cd/m temp. sRGB 6500k 0.313±0.015 0.329±0.015 160 ± 20 cd/m (Gamma=2.2±0.2) 3.1.7.8 Brightness Adjustable Range Item...
  • Page 12 (3) Procedure: Confirmed sample with appearance and function ready before testing then compare with after test record as brightness, uniformity and contrast ratio. Perform random vibration after sine-wave vibration test. Test Spectrum: 20 Hz 0.0185(g2/Hz) Unpackaged, 200Hz 0.0185(g2/Hz)  (2) Unpackaged Vibration Non- Duration : 5 Minutes Axis : 3 axis ( Horizontal and...
  • Page 13 3.1.7.14 Reliability Item Condition Spec OK N. Remark Excluding  MTBF Prediction Refer to MIL-217F > 60,000 Hours backlight  LED Life time At 25±2℃, under 6.0mA 30,000 Hours (min) See Note-4 Note-4: Audio performance Item Condition Spec OK N. Remark Preamp + Power amp ...
  • Page 14 3.1.7.16 Optical characteristics of LCD panel Item Unit Conditions Min. Typ. Max. Remark [degree] Horizontal [degree] (Right) CR = 10 (Left) Viewing Angle [degree] Vertical [degree] (Up) CR = 10 (Down) Contrast ratio Normal Direction 420 [msec] Rising Time Response Time [msec] Falling Time [msec]...
  • Page 15 3.1.7.18 OSD control function definition Item Condition Spec OK N. Remark  Auto Adjust Auto-Geometry  Brightness  Contrast  Horizontal Position  Vertical Position  Pixel Clock  Phase Bluish Reddish Normal sRGB  Color Senseye User: Separate R/G/B adjustment Reset Color OSD Horizontal position...
  • Page 16 3.1.7.20 Weight Item Condition Spec OK N.A Remark  Monitor (Net) 2.96Kg Monitor with packing  4.15 Kg (Gross) 3.1.7.21 Plastic Item Condition Spec OK N.A Remark  Flammability >ABS<,94-HB  65 ℃ Heat deflection To  UV stability Delta E < 8.0 MPRII: ABS ...
  • Page 17 Pallet B: 116 Pallet B: 9 1890(EU) Pallet A: 90 Pallet A: 21 Without pallet 3.1.7.24 Carton Specification Product: Dimension w/o Base Dimension w/ Base Net Weight (Kg) Gross Weight (Kg) W*H*D (mm) W*H*D (mm) 2.96Kg 4.15 Kg 490.69*299.89*57 mm 490.69*370.74*163.9mm Package: Carton Interior Dimension (mm)
  • Page 18 3.1.8 Certification GL2055 Regulatory Request Form RR No.: 20120104-RR-S003 Product Line: Regulatory Name: GL2050-B; GL2050-BA Model Name: GL2055 Marketing Name: GL2055; GL2255A; GL2255M 佳世達科技股份有限公司. Vendor: Factory Name: Qisda(Suzhou) Co., Ltd) Factory Address: No. 169 Zhujiang Road, New District, Suzhou, Jiangsu 215129, P.R. China(中國江蘇省蘇州市新區珠江路169號)

  • Page 19: Customer Acceptance

    This document establishes the general workmanship standards and functional Acceptance criteria for LCD color monitor model GL2055/GL2055A/GL2055M Produced by BenQ Peripherals, Inc. 3.2.2. PURPOSE The purpose of this publication is to define a procedure for inspection of the LCD monitor by means of a customer acceptance test, the method of evaluation of defects and rules for specifying acceptance levels.
  • Page 20 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. Major defective A major defective contains one or more defects and may also contain minor defects but contains no critical defect.
  • Page 21 TEST EQUIPMENTS 1. PC with display adapter or other specific display adapter which is agreed upon by both parties 2. Test program by BenQ 3. Ruler 4. Power saving test tool 5. Minolta color analyzer ( CA-110 or BM – 7 ) 3.2.12.
  • Page 22 1.5 Wrong marking of model number Major 1.6 Wrong serial # marking on carton Major 1.7 Product wrongly placed in box ( upside down ) Major 1.8 Broken polyfoam or PU foam Major 1.9 Broken packing bag Major 1.10 Wrong size or poor printing for artwork/character Major 1.11 Bar-code wrong, missing, or damaged Major...
  • Page 23 4.5 Cable crack Major 4.6 Cable scratch ( wire not exposed ), or dirty Major 4.7 AC-DC adapter no function Minor 4.8 Signal cable contact pin dirty Major Interior of the product 5.1 Use Non-QVL ( Qualify vendor list )component Major 5.2 Wrong parts, broken component, but safe Major...
  • Page 24 16 GREY Gray Check Black/White stripe pattern Electric characteristics 3.2.14. PANEL INSPECTION CRITERIA Panel 料号 Panel P/N AUO M200RTN01.0 机种 Model Name GL2055 G2055A/GL2055M 廠商 Panel maker Bright Dot ≦0 Dots Single(单点) 亮点 Dark Dot ≦5 Dots Single(单点) 暗点 B-Dot...

  • Page 25: Level 1 Cosmetic / Appearance / Alignment Service

    4. Level 1 Cosmetic / Appearance / Alignment Service Software / Firmware Upgrade Process (Only for GL2055A) 4.1.1 Hardware Requirement: 1. I2C board x 1 (a.Print Board b. I2C Board) 2. DSUB VGA cables x 2 3. Printer cable (with one male connector and another female connector) x 1. 4.
  • Page 26 Link “I2C BD, Power cable and Signal cable 4.1.2 Software prepare Step 1: Un-zip Port95nt and install into your computer. Step 2: Un-zip ISP application tool (RTDTool) Step 3: Choose “ IIC”, “Serial Flash” and “0x94”. Then, press “ISP” - 26 -...
  • Page 27 Step 4: Click the “Bank” and Find the F/W 1. xxx. H00 2. xxx.H01 3. xxx.H02 4. xxxEXT.Hex Step5: Choose “P-Flash” and “Auto” Step6: Press to run the program Step7: Check result, If the words showed in red, need to run the program again - 27 -...
  • Page 28 Note: you can change program speed bar to meet your equipment speed if program firmware fail. - 28 -...
  • Page 29 (Only for GL2055/GL2055M) 4.1.3 Hardware Requirement: Step 1: Prepare PC with 2K or XP system, printer port cable x1 and D-sub cable x1 Step 2: Prepare Qisda ISP board and setup jumper as below. Pin 1 &2 of J5,J6,J7,J8 are for Firmware Upgrading.
  • Page 30 Step 3: 1. Connect printer port cable between PC LPT1 and Qisda ISP board Then connect signal cable between Qisda ISP board (position 1) and monitor. 2. Power on the monitor. a. Connect the Printer Cable to the Printer Connector. b.
  • Page 31 Step 4: Program Setting Click the button „Auto‟, to set the ISP tool as bellow: - 31 -...
  • Page 32 Step 5: Click the button “Read” to open the firmware that will be ISP Step6: Click the button “Connect”, one cue “Device Type is xxxx” will show as bellow. If not , check connect again: - 32 -...
  • Page 33 Step7: Click the button “Run” to continue the programming. If the ISP process is successful, it will show “Pass” Step8: AC off/on, and turn on Factory Menu, and check F/W version - 33 -...
  • Page 34 4.1.5 EDID Upgrade Procedure Step 1: Run the program “Q-EDID-V016.exe”, when the UI popped up Note: If “VGA” choose 128bytes, and “HDMI” choose 256bytes - 34 -...
  • Page 35 Step 2: Click “Open File” and select “VGA” or “HDMI” EDID file Step 3: If load file is successful, it shows “Open EDID Table OK.” And then, Click “Write EDID” button to update EDID - 35 -...
  • Page 36 Step 4: If write EDID is successful, it shows ”Write EDID OK …” And then, click “Read EDID” button to check if successful or not. Step 5: If read EDID is successful, it shows” Read EDID OK …” - 36 -...

  • Page 37: Alignment Procedure (For Function Adjustment)

    4.2. Alignment procedure (for function adjustment) A. Preparation: Setup input timing ICL-605 (800x600@60Hz), Pattern: 5-Mosaic. Setup unit and keep it warm up at least 30 minutes. B. Timing adjustment: Enter factory setting area (press “ENTER”, “MENU” and then press “SOFTPOWER”). Check the settings to following values: Contrast = 50 Brightness = 100...
  • Page 38 D. Color adjustment: 1. Setup input timing ICL-605, white pattern. 2. Confirm auto color adjustment had already done. 3. Measure color temperature by Minolta CA-110 (or equivalent equipment). 4. Check the color temperature Bluish, Reddish & Normal. The color temperature specification as follows: Color mode Color temperature...
  • Page 39 Assembly note (Only for GL2055/ GL2055A) Step 1: Insert wire from PWR-BD and LVDS on I/F-BD: GL2055 I/F-BD GL2250A I/F-BD Step 2: Put PNL wire to PWR BD hole of SHD: Step 3: Fasten PWR BD and IF BD by screw...
  • Page 40 GL2055 GL2055A Step4: Fasten D-SUB with hexagon screws and fasten DP with screw GL2055 SCRW MACH STEEL HEX #4-40 8F.205B4.019 DVI*2 D-SUB*2 GL2055A SCRW MACH STEEL HEX #4-40 8F.205B4.019 D-SUB*2 GL2055 GL2055A Step5: Insert CTRL BD to BZL Step6: Put ASSY SHD on Panel and connect FFC wire、LVDS wire、panel wire...
  • Page 41 Step7: Put in Tape adhesive to panel wire Step8: Assemble BZL and ASSY SHD by Screw SCRW TAP FPH M3*8L(5/0.8) B- 8F..00607.8R0 FC/BKT_hinge*1 Step9: Covering the Rear Cover and Fasten by screw SCRW M FPH M3*6L(6.5/1.2) B- 8F.8A354.6R0 HINGE/RC*2 - 41 -...
  • Page 42 Step10: Combined Assy Base and Assy CLMN Step11: Slid Stand to monitor slider hole (Only for GL2055M) Step1: Insert wire from PWR-BD and LVDS on I/F-BD: GL2055M I/F-BD Step2: Follow the mark symbol and Insert Speaker to SHD - 42 -...
  • Page 43 Step3: Put Speaker Line to IF BD hole of SHD; Connect SPS BD and IF BD By wire Step4: Put PNL wire to PWR BD hole of SHD: Step5: Connect SPS BD and Speaker By wire - 43 -...
  • Page 44 Step6: Fasten PWR BD and IF BD by screw Step7: Fasten DVI、D-SUB with hexagon screws and fasten DP with srew 8F.205B4.019 SCRW MACH STEEL HEX #4-40 NI DVI*2 D-SUB*2 Step8: Insert CTRL BD to BZL - 44 -...
  • Page 45 Step9: Put ASSY SHD on Panel and connect FFC wire、LVDS wire、panel wire Step10: Put in Tape adhesive to panel wire Step11: Assemble BZL and ASSY SHD by Screw 8F..00607.8R0 SCRW TAP FPH M3*8L(5/0.8) B-ZN FC/BKT_hinge*1 - 45 -...
  • Page 46 Step12: Covering the Rear Cover and Fasten by screw 8F.8A354.6R0 SCRW M FPH M3*6L(6.5/1.2) B-ZN HINGE/RC*2 Step13: Combined Assy Base and Assy CLMN Step14: Slid Stand to monitor slider hole - 46 -...

  • Page 47: Level 2 Disassembly /Assembly Circuit Board And Standard Parts Replacement

    5. Level 2 Disassembly /Assembly Circuit Board and Standard Parts Replacement 5.1. Exploded View - 47 -...
  • Page 48 GL2055 * This Service BOM is subject to change. Please check it on eSupport and SPO system before service parts order release - 48 -...

  • Page 49: Disassembly /Assembly

    5.2. Disassembly /Assembly 5.2.1 Disassembly SOP Preparation before disassemble 1. Clean the room for disassemble 2. Identify the area for monitor 3. Check the position that the monitors be placed and the quantity of the monitor, prepare the area for material flow; according to the actual condition plan the disassemble layout 4.
  • Page 50 Disassembly the bezel from the monitor, notice the disassembly order : 1.Top (1) parts of bezel 2. Left (2) parts of bezel 3. Right (3) parts of bezel 4. Bottom (4) parts of bezel It‟s easy to break - 50 -...
  • Page 51 Turn over the monitor, dismantle the Rear cover from the monitor. Take out the control board FFC wire. Disassemble the control board Tear the tapes Remove the LAMP wire, Remove the FFC cable. Unlock the screw on the Screw-driver BZL. - 51 -...
  • Page 52 Unlock 2pcs screws, Take the main-SHD off Screw-driver the BZL Then take the panel off the BZL. Unlock screws Screw-driver - 52 -...
  • Page 53 Disassemble the PCBA from the Main-SHD. Take out the speaker wire Disassemble the I/F and the Power Board，then take out the FFC LVDS Nipper pliers Disassemble the speakers (Only for GL2055M) *The assembly is in the reverse order of disassembly. 5.2.2 Assembly SOP 1.
  • Page 54 Assemble speakers on shielding Nipper pliers (Only for GL2055M) Open lid of the connecter and insert one side of FFC wire into interface board and close the lid Lock screws Screw-driver - 54 -...
  • Page 55 Then put the panel on the BZL. Lock 2pcs screws, put the main-SHD on the Screw-driver Lock the screw on the Screw-driver BZL. Connect the FFC cable. Connect the LAMP. Stick the tapes. - 55 -...
  • Page 56 Assemble the control board Put on the control board FFC wire. Turn over the monitor; assemble the Rear cover from the monitor. - 56 -...
  • Page 57 Assembly the bezel from the monitor, notice the assembly order : 1.Top (1) parts of bezel 2. Left (2) parts of bezel 3. Right (3) parts of bezel 4. Bottom (4) parts of bezel It‟s easy to cover - 57 -...
  • Page 58 Fix it by 2pcs screws. - 58 -...

  • Page 59: Packing

    5.3. Packing - 59 -...

  • Page 60: Block Diagram

    5.4. Block diagram GL2055 is a 20W” WXGA+ (1600x900) resolution TFT LCD monitor. The monitor shall support VGA and DVI with HDCP inputs. It‟s compliant with VESA specification to offer a smart power management and power saving function. It also offers OSD menu...
  • Page 61 GL2055 Block Diagram 30Pin Interface Power Board LED backlight Unit AC in Auto Menu Left Right Enter Power GL2055A Block Diagram 30Pin Interface Power Board LED backlight Unit AC in Auto Menu Left Right Enter Power - 61 -...

  • Page 62: Trouble Shooting Guide

    5.5. Trouble Shooting Guide 5.5.1 No Display or display is unstable on analog or digital port: 5.5.1.1 Interface Board: - 62 -...
  • Page 63 5.5.2 BUTTON Function: - 63 -...
  • Page 64 5.5.2.1 OSD Function - 64 -...
  • Page 65 5.5.3 Power no work troubleshooting (Only for GL2055A) - 65 -...
  • Page 66 (Only forGL2055/GL2055M) - 66 -...
  • Page 67 5.5.4 Audio Function (Only for GL2055M) - 67 -...

  • Page 68: Circuit Operation Theory

    5.6. Circuit Operation Theory I. Introduction: GL2055/GL2055A/GL2055M is a 20W” WXGA+ (1600x900) resolution TFT LCD monitor. The monitor shall support VGA and DVI with HDCP inputs. It‟s compliant with VESA specification to offer a smart power management and power saving function. It also offers OSD menu for users to control the adjustable items...
  • Page 69 LCD monitor specification. PC can read them by “SDA” and “SCL” serial communication for I²C communication for DDC2Bi. 2.) Scalar IC: RTD2270L (GL2055A) and TSUMU58VHJ (GL2055/GL2055M) are total solution graphics processing IC for LCD monitors. It is configured - 69 -...
  • Page 70 LVDS panel interface format. And it also integrates power management control capability for green-mode requirements and spread-spectrum support for EMI management. 3.) EEPROM: We use 24C04 (GL2055A) and 24C16 (GL2055/GL2055M) to store all the adjustable data, user settings and use 24C02 to store D-SUB EDID data.

  • Page 71: Appendix 1 - Screw List / Torque

    Appendix 1 – Screw List / Torque STANDARD SCREW TORQUE SPEC for QCS MOUNTING TORQUE HOLE SIZE Screw ITEM P/N DESCRIPTION MATERIAL (KG-CM) (MM) Head Metal; SCRW MACH HEX #4-40*0.3" 8F.205B4.019 D-SUB;DVI 5.0±0.6 #4-40 Connector 5.0±0.6 Metal Metal to Side mount: SCRW MACH 8F.5A224.6R0 metal...
  • Page 72 Have tread: 6～8 Aluminum: 4~5 Metal SCRW TAP FLAT+EXT M4*6L 8F.VZ526.6R0 Metal to M4*0.7 ZN-W 10±1.0 metal Metal Metal to Φ2.68±0.03 #2 metal SCRW TAP FPHM3*6(6/1)TP- Plastic to 8F.HA334.8R0 S B-ZN metal Metal Metal to metal 9.0±1.0 M4*0.7 SCRW MACH FLAT M4*8L C- Plastic to 8F.5A456.8R0 ZN NYLO...
  • Page 73 plastic PCB to plastic Plastic Metal to SCRW TAP CAP M3*1.34P*8L Φ2.35±0.05 #2 8F.WA314.8R0 plastic 5.0±1.0 B-ZN Plastic to plastic Φ2.35±0.05 #2 8F.XA224.6R0 SCRW TAP FH M3*6L ZN PLASTIC 4.5±0.5 Plastic Metal to SCRW TAP FLAT M3*1.34P*8L Φ2.35±0.05 #2 8F.XA314.8R0 plastic 4.5±0.5 B-ZN...
  • Page 74 SCREW TORQUE: 1.0±0.2 SCREW TORQUE : (KG-CM) 1.0±0.2(KG-CM) Standard screw torque spec for SKD site (QZB and QMX) Screw Part NO. Description torque Size head SCRW M FH M4*8L(D7.5)B-ZN 8F.00524.8R0 10.5±1.0 8F.5A256.8R0 SCRW MACH FH M4*8L ZN NYL 10.5±1.0 SCRW MACH FH M4*10L B-ZN 8F.5A356.100 10.5±1.0 SCRW MACH FH M4X12L B-ZN...
  • Page 75 6.5±0.5 SCRW TAP FLAT+EXT M3*6L C- (SECC/SGCC 26 8F.VZ524.6R0 0.5T) 27 8F.1A524.5R0 SCRW MACH PAN M3*5L NI 4.5±1.0 *SCREW QUANTITY & TYPE D-SUB Connector DVI Connector AND POSITION SCREW TORQUE SPEC. SCREW TORQUE SPEC. REFERRED TO Q328. *NOTES: 1. (A)STANDARD SCREW TORQUE SPEC.

  • Page 76: Appendix 2-Physical Dimension Front View And Side View

    Appendix 2-Physical Dimension Front View and Side view Fig. 1 Physical Dimension Front View and Side view - 76 -...
  • Page 77 Fig. 2 Appearance Description - 77 -...

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