BenQ GL950A Service Manual
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BenQ GL950A Service Manual

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Applicable Country & Regions: Globe
Service Manual for BenQ:
GL950A: D-SUB
P/N: 9H.L6RLA.T8X
GL950AM: D-SUB + AUDIO
P/N: 9H.L6SLA.T8X
G950A: D-SUB
P/N: 9H.L6TLA.T8X
G950AM: D-SUB + AUDIO
P/N: 9H.L7DLA.T8X
Glossy Black Chassis Colors
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 (Jul. 2011)
©
Copyright BenQ Corporation 2011. All Right Reserved.
Version: 1st
Date:07-04-2011
1

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  • 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 (Jul. 2011) ©...

  • Page 2: Table Of Contents

    Content Index Abbreviations & Acronyms ............................3   1. About this Manual ..............................5   1.1 Important ................................5   1.2 Trademark ................................5   2. Introduction ................................6   2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS............. 6   2.2 Safety Warning and Notice ..........................

  • Page 3: Abbreviations & Acronyms

    Abbreviations & Acronyms Analog to Digital Converter Automatic Frequency Control: control signal used to tune to the correct frequency BenQ BenQ Corporation BTSC Broadcast Television System Committee Central Process Unit CVBS Composite Video Blanking and Synchronization Digital Light Processing / Texas Instruments®...
  • Page 4 Not Connected Non Volatile Memory: IC containing TV related data (for example, options) On Screen Display Personal Computer Printed Circuit Board (or PWB) Remote Control transmitter Red, Green and Blue. The primary color signals for TV. By mixing levels of R, G and B, all colors (Y/C) are Read Only Memory Data signal on I...

  • 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: Introduction

    2. Introduction This section contains general service information, please read through carefully. It should be stored for easy access place. 2.1 RoHS (2002/95/EC) Requirements – Applied to all countries require RoHS. The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a legal requirement by EU (European Union) for the global electronics industry which sold in EU and some counties also require this requirement.

  • Page 7: Compliance Statement

    BenQ service center for assistance. 6. To avoid possible electric shock, do not dissemble or repair the monitor. 7. If a bad smell or an abnormal sound appears to come from the monitor, contact your nearest BenQ service center for assistance immediately.

  • Page 8: General Description

    3. General Description This new LCD (Liquid Crystal Display) monitor BenQ GL950A/GL950AM/G950A/G950AM offers numerous features and functions, for example:  Panel Type: TN + LED (GL950A/GL950AM)  Panel Type: TN + CCFL (G950A/G950AM)  Minimal space requirements thanks to slim casing ...

  • Page 9: Product Overview

    5. Product Overview 5.1 Monitor Specifications GL950A GL950AM G950A G950AM Conf. 2 Conf. 4 Conf. 1 Conf. 3 D-sub (include D-sub (include D-sub (include D-sub (include component source) component source) component source) component source) + speaker + speaker Panel Type (TN / VA...
  • Page 10 Ver. Frequency (Hz) 50-76 50-76 50-76 50-76 Video Bandwidth (MHz) Audio Speakers (built-in) 1W x 2 1W x 2 PC Video Input D-sub D-sub D-sub D-sub Input/Output Audio line in Earphone Jack AC: 100~240V AC: 100~240V AC: 100~240V AC: 100~240V Voltage Rating (Built-in) (Built-in)
  • Page 11 S-Chinese) / S-Chinese) S-Chinese) / S-Chinese) Vista Basic Basic Basic Basic Win 7 Other feature Dynamic Power Saving (DPS) Accessories Refer to SKU list Refer to SKU list Refer to SKU list Refer to SKU list Refer to the Refer to the Refer to the Refer to the Regulation...
  • Page 12 5.1.1 Certification Certification / Requirement Shipment Certification Regulatory Country Request for (Black is Type Applied BenQ Region Country Remark Applied (Pls Certification mandatory (safety/safety Sample by vendor select) (Pls select) and blue is & BenQ Reguest voluntary) EMC/EMC/GP) Must include...
  • Page 13 assigned third-party test. VCCI Vender provide J-Moss relevant information and report If VOC Japan test is Vender Meet the Class Level: requeste provide PC3R d, please PC3R relevant requirement provide 1 ★ ★★ information of 2009 sample and report version. ★★★...
  • Page 14 Including BSMI certificate, BSMI report and BSMI authorizatio n letter for BENQ if the Taiwan BSMI Safety & EMC applicant of BSMI certificate is vendor and vendor will perform the clearance for BenQ. Saudi SASO Safety Arabia Vender provide relevant...
  • Page 15 cCSAus…etc Class Level: Vender provide gold silver EPEAT relevant information cuprum and report Mexico Safety Safety & EMC Vender provide relevant information and report Vender Member provide countries WEEE relevant of EU European information Union and report Vender provide REACH relevant information and report...
  • Page 16 Including Test Report by EPA recognition Accreditation Laboratory Certificate by International Energy Star recognition Certification Body (CB). Effective date: 2011-1-1. BenQ phase in date: 2010-12-6. Below just for GL950A/GL950AM TCO'03 Safety & GP Internation International Safety & GP Displays 5.0...

  • Page 17: Panel Inspection Specification

    5.2 Panel Inspection Specification 1 Scope: 1.1 The incoming inspection standards shall be applied to TFT-LCD Modules (hereinafter called "Modules") that supplied by AU Optronics Corporation (hereinafter called "seller"). 1.2 Specifications contains _ Electrical inspection specification _ Appearance specification _ Outside dimension specification 2 Incoming inspections: The buyer (customer) shall inspect the modules within twenty calendar days of the delivery date (the "inspection period”) at its own cost.
  • Page 18 Major defects: A major defect is a defect that is likely to result in failure, or to reduce materially the usability of the product for its intended purpose. Minor defects: A minor defect either is a defect that is not likely to reduce materially the usability of the product for its intended purpose, or is a departure from an established having little bearing on the effective use or operation of the product.
  • Page 19 Note 1: For bright dot defect, bright area should be larger than 1/2 area of a sub-pixel to be count as 1 dot defect. A dot defect that is smaller than the defined dot defect will be treated as small bright dot. The drawing of 1/2 area sub-pixel definition: The 1/2 area sub-pixel can be defined as below one or more of specific shapes (Fig.1).
  • Page 20 6.2 Appearance inspection specification Note 1: When L>=2W, defect count as liner defect. Note 2: D=1/2(W+L) Note 3: To verify the responsibility of following defects was caused by supplier, the IQC checks as requested on above items before mass production such as the Polarizer Scratch, Gap Mura, TFT Glass broken…etc.
  • Page 21 6.3 Outside dimension specification: Inspection Item Specification Testing Note Order Name Unit Tolerance Outside dimension (vertical) ± 0.5 mm (Please refer to the product Outside dimension (horizontal) ± 0.5 mm spec for detailed dimension definition) Outside dimension (thickness) ± 0.5 mm Note 1 Weight ±...
  • Page 22 8.3 Avoid dust or oil mist during assembly. 8.4 Follow the correct power sequence while operating. Do not apply the invalid signal, otherwise, it will cause improper shut down and damage the module. 8.5 Less EMI: it will be more safety and less noise. 8.6 Please operate module in suitable temperature.

  • Page 23: Level 1 Cosmetic / Appearance / Alignment Service

    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 24 2.Connection 3.Install USB driver. 3.1. When insert the USB cable to PC USB port, will pop up a Hardware Wizard to help you install the USB driver if you use this ISP board first time. You can install it successfully as the below instruction step by step. Remark: The USB driver files path: D:\FTC100103(Mstar)\FTCUSB.INF...
  • Page 25 Click “Finish” to complete the USB serial port driver installation.
  • Page 26 4. Install the ISP tool. 4.1.Copy the three files in one folder. 4.2. Double-click to run the ISP tool. 4.3. Set the parameters in “Device” window. Tick “WP Pin pull to high during ISP”.
  • Page 27 4.4. Connect to the monitor. Click “Connect”. If the tool communicate with monitor successfully, the tool will detect the flash type of monitor. 4.5. Load the F/W you want to upgrade.
  • Page 28 4.6. Set the restore address. 4.7. Set parameter in “Auto” window.
  • Page 29 4.8.Processing of upgrade. After clicking “Run”, the tool start to program. It is forbided to power off monitor or switch off connection during programming. 4.9.Successful upgrade. When upgrade successful, there will be green Pass letter appearing.
  • Page 30 5. Check the FW version after upgrade. (1)Connect signal source and power cable to monitor and DC off it. (2) Press “menu” key and “power on” key synchronously as below figure. When the screen lights, release the two buttons and then press “menu” again to open below factory menu. Power on key Menu key Check this F/W...
  • Page 31 6. Troubleshooting. Can’t Entry ISP Mode!! (1) Check the cables and ISP JIG are connected fluently. (2) Click the “Dis Con” and click “Connect” again. (3) AC off the monitor for a while and retry it. (4)Change ISP JIG or cable. (5)Change PC.

  • Page 32: Adjustment / Alignment Procedure

    2. MENU key: Activates OSD main menu and return to the previous menu or exit OSD. 3. ▲/Display Mode key (for G950A/GL950A): For Up/Increase adjustment. The key is the hot key for Display Mode. ▼/Volume key (for G950AM/GL950AM): For Up/Increase adjustment. The key is the hot key for Volume.
  • Page 33 Volume hot key (for G950AM/GL950AM) Press the ▲ key to display the Volume indicators. Further press the ▲ key will increase the volume, while the ▼ key will decrease the volume. To Mute, press the Volume hot key for 3 seconds. To release Mute, press the Volume hot key for 3 more seconds. Mode hot key Press the ▼...
  • Page 34 Main Menu Mode You can use the OSD (On Screen Display) menu to adjust all the settings on your monitor. Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out.
  • Page 35 Item Function Operation Range Press the ENTER Auto Optimizes and adjusts the screen settings automatically for you. key to select this Adjustment The AUTO key is a ‘hot key’ for this function. option and make adjustment. 0 to 100 H. Position Adjusts the horizontal position of the screen image.
  • Page 36 (tone becomes lighter). Color - Press ENTER to enter the Color menu. Normal: Allows video and still photographs to be viewed with natural coloring. This is the factory default color. Bluish: Applies a cool tint to the Press the ▲ or ▼ keys to select this image and is factory pre-set to the option.
  • Page 37 Picture Advanced Menu Available menu options may vary depending on the input sources, functions and settings. Menu options that are not available will become grayed out. 1. Press the MENU key to display the main menu. 2. Press the ▲ or ▼ keys to select PICTURE ADVANCED and then press the ENTER key to enter the menu. 3.
  • Page 38 This feature is provided to allow aspect ratios other than 16:9 to be displayed without geometric distortion. • Overscan – Slightly enlarges the input image. Use this feature to hide annoying edge noise if present around your image. Press the ▲ or ▼ keys •...
  • Page 39 3. Press the ▲ or ▼ keys to move the highlight to a menu item and then press the ENTER key to select that item. 4. Press the ▲ or ▼ keys to make adjustments or selections. 5. To return to the previous menu, press the MENU button. Item Function Operation...
  • Page 40 The language options • Italian displayed on your OSD may differ • Spanish from those shown on the right, • Polish depending on the product supplied • Japanese in your region. • Czech • Traditional Chinese • Hungarian • Simplified Chinese •...
  • Page 41 saving mode. to change the settings. • 20min. • 30min. • Input • Current Resolution Displays the current monitor • Optimum Information property settings. Resolution (best with the monitor) • Model Name Resets all mode, color and Press ▲ or ▼ keys to change the Reset All geometry settings to the factory settings.
  • Page 42 Note: P: Preset Mode NP: None Preset Mode FS: Fail Save Mode (show “out of range”, but still can see picture) O: Out of Range (only show “out of range”, without picture) BenQ Pixel V-sync Preferred H-sync 1366x768 1440x900 1600x900 1680x1050 1920x1080...
  • Page 43 1024x768 78.43 57.67 72.00 1024x768 80.00 60.24 74.93 DMT-8 1024x768 78.75 60.02 75.03 DMT-9 1024x768 94.50 68.68 85.00 1152x720 66.75 44.86 1152x864 94.50 63.85 70.01 DMT-10 1152x864 108.00 67.50 75.00 GTF-7 1152x864 119.651 77.09 85.00 1152x870 100.00 68.68 75.06 1152x900 92.94 61.80 65.95...
  • Page 44 DMT-25 1440x900 106.5 55.935 59.887 1440x900 136.75 70.6 1600X900-R 97.75 55.54 59.98 1600x1000-R 108.5 61.648 59.910 CVT-10 1600x1000 132.25 62.14 59.87 1600x1000 169.25 78.356 74.83 CVT-2 1600x1200-R 130.25 74.01 59.92 DMT-14 1600x1200 162.00 75.00 60.00 1600x1200 175.50 81.25 65.00 1600x1200 189.00 87.50 70.00...
  • Page 45 99999 hours and will be reset once launch. 7. Add BenQ logo on/off item, the default is “on” 8. Add the auto power on item, the default is “on”...

  • Page 46: Level 2 Circuit Board And Standard Parts Replacement

    Level 2 Circuit Board and Standard Parts Replacement Product Exploded View Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. Item Description Unit BEZEL LENS KEY BUTTON KEY BOARD...
  • Page 47 SPEAKER (for GL950AM/G950AM) PLATE REAR COVER HINGE STAND BASE FOOT PAD SCREW Item Part No. Description Unit 0D1G1030 6120 POWER BOARD & MAINFRAME 0M1G1740 8120 POWER BOARD & MAINFRAME 0D1G1030 6120 MAIN/POWER BOARD & MAINFRAME AM1G1740 10 47 CR3 STAND & HINGE 0M1G 130 12 47 CR3 MAIN FRAME &...

  • Page 48: Six Angles' View

    Six Angles’ View...

  • Page 49: Product Disassembly/Assembly

    Product Disassembly/Assembly Note: Take GL950AM for example. Note: The speaker just for G950AM/GL950AM. Disassembly 1) Remove the base Place the monitor face down on a smooth surface. Be careful to avoid scratch and injury during the process of uninstall. And then remove the base. Remove the stand.
  • Page 50 3) Remove the rear cover Remove screws in red: Pull apart bezel & rear cover. Note: Be careful, the BEZEL CLIP is easy to break.
  • Page 51 Note: The positions of the clips on the rear cover are as follow. There are some small gaps between CLIPS. It’s suggested to separate bezel and rear cover from the gaps. Example: You can separate the bezel and rear cover from here. 4) Remove the main frame from the panel.
  • Page 52 Pull out the wire to remove the mainframe. The mainframe 5) Remove the AC cover from the mainframe.
  • Page 53 6) Remove the boards from the main frame. Remove screws in red; remove the black rubberized fabric, and then pull out the wire which connects speaker and power board. The main board The power board Pull out the wire to remove the main board and power board.
  • Page 54 7) Remove the speaker. Pull at the foot of the speaker strongly as follow picture. The foot of the speaker The foot of the speaker The foot of the speaker The foot of the speaker The mainframe 8) The panel...
  • Page 55 Assembly 1) Assemble the speaker on the main frame. Pull at the foot of the speaker strongly. The wire of the speaker will be traversed from the middle hole as follow picture. The wire will connect power board and speaker. The foot of the speaker The foot of the speaker The foot of the speaker...
  • Page 56 3) Assemble the main board and power board on the main frame. Connect the main board and power board. Connect the speaker and power board; lock the main board and power board on the mainframe; stick the black rubberized fabric. Connect speaker and power board.
  • Page 57 4) Assemble the panel on the bezel. 5) Assemble the main frame and the key board. Connect key board and main board, panel and power board, panel and main board. Connect key board and main board. Connect panel and main board. Connect panel and power board.
  • Page 58 Stick the black rubberized fabric and aluminum foil to tidy the wire. 6) Assemble the AC-COVER.
  • Page 59 7) Assemble the rear cover. Lock the main frame and rear cover as follow picture. 8) Assemble the stand. Push the stand as follow picture. 9) Assemble the base.

  • Page 60: Block Diagram

    Block Diagram Main Board Crystal Panel Interface 14.31818MHz (CN405) (X401) Flash ROM Scalar IC Key Control Interface MX25L2026DM1I TSUMU18TR-LF (CN408) (U402) (U401) EEPROM H/V sync M24C02-WMN6TP DSUB_SCL (U102) DSUB_SDA D-Sub Connector (CN101)
  • Page 61 Power Board G950A/G950AM 715G5000P01001003H AC input Bridge Rectifier Transformer EMI filter Rectifier diodes and Filter Start Resistor (R908) Feedback PWM Control Circuit Power Switch (IC901) (Q901) Photo coupler (IC902) MOSFET +16V (Q806) Inverter Connector (CN801,CN803) PWM Control Feedback Circuit ta9687GN-A-0-TR ON/OFF (IC801)
  • Page 62 GL950A/GL950AM 715G5000P01000003H AC input Bridge Rectifier Transformer EMI filter Rectifier diodes and Filter Start Resistor (R908) Feedback PWM Control Circuit Power Switch (IC901) (Q901) Photo coupler (IC902) D801 L802 +16V MOSFET Connector (Q806) (CN802) PWM Control Feedback Circuit ON/OFF MP3389EY...

  • Page 63: Schematic Diagram

    Schematic Diagram Main Board 715G4967M0D000004L TSUMU18TR SCHEMATIC XGA/SXGA LVDS OUTPUT DSUB_R+ DSUB_R+ VCC1.8 DSUB_R- DSUB_R- DSUB_G+ DSUB_G+ VCC3.3 DSUB_G- DSUB_G- VCC1.8 DSUB_SOG DSUB_SOG DSUB_B+ DSUB_B+ DSUB_B- DSUB_B- VCC3.3 CMVCC DSUB_H DSUB_H DSUB_V DSUB_V DDC1_SDA DDC1_SDA DDC1_SCL DDC1_SCL DET_CABLE DET_CABLE CMVCC CMVCC EDID_CTRL EDID_CTRL...
  • Page 64 C101 H_Sy nc R101 0R05 1/10W R102 100R VGA_B+ R150 R104 DSUB_H DSUB_B+ (5) V_Sy nc R103 100R 0R05 1/10W DSUB_V 47N16V R107 C104 ZD107 ZD108 R105 R106 C102 C103 75 OHM 2.2K 2.2K 5PF 50V RLZ5.6B RLZ5.6B 22P 50V 22P 50V C105 VGA_B-...
  • Page 65 AVDD VCC3.3 C406 C407 0.1UF 16V 0.1UF 16V VCC3.3 AVDD FB401 VCC3.3 U401 120OHM C434 C403 NC/10uF 16V C404 LVA3P 0.1UF 16V 0.1UF 16V DSUB_R+ RIN0P LVA3M DSUB_R- RIN0M PA[0..1] DSUB_G+ GIN0P PA[0..1] DSUB_G- GIN0M LVA2P DSUB_SOG SOGIN0 LVA2M DSUB_B+ BIN0P LVA1P DSUB_B-...
  • Page 66 PANEL_VCC PA[0..1] PA[0..1] CN403 LVA3P PANEL_VCC CN405 LVA3M PA[4..9] PA[4..9] R477 R434 C420 C421 LVA2P LT-SDA LT-SDA LVA2M LT-SCL LT-SCL LVA1P LVA1M LVA0P LVA0M PB[0..9] LVB3P RXE3+ PB[0..9] LVB3M RXE3- LVB3P LVB3M LVBCKP RXEC+ LVBCKP LVBCKM RXEC- LVBCKM LVB2P LVB2P RXE2+ LVB2M LVB2M...
  • Page 67 CMVCC CMVCC (4,5,6) CMVCC VCC3.3 R437 CN404 BKLT-EN CMVCC R439 CMVCC CMVCC (4,5,6) CMVCC C425 BKLT-VBRI R449 Q406 R440 on_BACKLIGHT (5) BKLT-EN R450 C_PANEL_INDEX LMBT3904LT1G PANEL_ID# (5) Volume Mute Mute CONN VCC3.3 CMVCC CMVCC FB403 R441 4.7K VCC3.3 BKLT-VBRI R442 U404 adj_BACKLIGHT (5) 100R...
  • Page 68 Power Board G950A/G950AM 715G5000P01001003H R929 100 OHM 1/4W L905 BD901 C916 1.1uH GBL408 R930 100 OHM 1/4W 1000PF500V +16V R903 100 OHM 1/4W R904 470OHM 3W ZD90 1 C929 M T ZJ20 B 470UF 25V C918 D901 1000UF 25V R905 FMX-12SL 470OHM1/10W T901...
  • Page 69 R817 +16V 2.2 OHM 1/4W Q805 ZD802 C823 4.7uF 25V ON/OFF RLZ5.6B ZD803 G1 D1 RLZ5.6B C824 4.7uF 25V R816 2.2 OHM 1/4W R802 +5Vi C819 JUMPER R803 R804 PT801 CN801 APM4548AK CONN 5K1 1/8W 5% 5K1 1/8W 5% POWER X'FMR 22R 1/8W 5% C803 C815...
  • Page 70 Just for G950AM LINE INPUT +5V_AUDIO 1/29 -->88G 30214K --> 88G 30214KD1C CN601 22K 1/10W R603 R602 +5V1 10K 1/10W 1% +5V_AUDIO R605 22K 1/10W FB602 R604 10K 1/10W 1% R632 0R05 1/4W Q602 JACK 120 OHM R608 C602 39K 1/10W 1% R606 1uF 16V R609...
  • Page 71 GL950A/GL950AM 715G5000P01000003H R929 100 OHM 1/4W L905 BD901 C916 1.1uH GBL408 R930 100 OHM 1/4W 1000PF500V +16V R903 100 OHM 1/4W R904 R911 470OHM 3W ZD90 1 C929 470OHM 3W M T ZJ20B 470uF 25V C918 C928 D901 680uF 25V...
  • Page 72 D801 +16V L802 47UH C812 C801 U801 B3100B R801 220N 50V MP3389EY 3.3 OHM 1/4W R826 300K 1/8W 5% C803 0.47UF 50V Q806 改为手插电容68nF C802 VFAULT C805 0.47UF 50V 68NF 10% 50V GATE G2 D2 1K 1/10W C838 R864 C804 ON/OFF COMP PGND...
  • Page 73 Just for GL950AM LINE INPUT +5V_AUDIO CN601 R603 22K 1/10W R602 +5V1 10K 1/10W 1% +5V_AUDIO R605 22K 1/10W FB602 R604 10K 1/10W 1% R632 0R05 1/4W Q602 JACK 120 OHM R608 C602 39K 1/10W 1% R606 1uF 16V R609 100 OHM 1/10W C604 C605...
  • Page 74 Key Board 715G5048K0C000004I LED_RED# LED_GRN# LED001 CN001 CONN R008 9K1 1/8W 1% LBADC1 R003 1K 1/8W 1% LBADC2 R002 3K 1/8W +/-1% DC_POWERON LED_GRN# LED_RED# R007 0R05OHM1/8W ZD007 ZD008 R004 1K 1/8W 1% R005 3K 1/8W +/-1% NC/UDZSNP5.6B NC/UDZSNP5.6B ZD006 NC/UDZSNP5.6B SW006 SW005...

  • Page 75: Troubleshooting

    Troubleshooting Frequently asked questions (FAQ) The image is blurred: Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions. How do you use a VGA extension cable? Remove the extension cable for the test.
  • Page 76 “NO” in the “OSD Lock” submenu from the “OSD Settings” menu (under SYSTEM), and all OSD controls will be accessible. If your problems remain after checking this manual, please contact your place of purchase or e-mail us at: Support@BenQ.com...
  • Page 77 No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC po indicates is OK? Replace the power board Replace main board and check connections Replace key board and check connections...
  • Page 78 No Video (Power LED Green) No Video (Power LED Green) Press the power Replace the main board button is OK? Replace the power The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 79 DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
  • Page 80 Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...

  • Page 81: Pcb Layout

    PCB LAYOUT Main Board 715G4967M0D000004L...
  • Page 85 Power Board G950A/G950AM 715G5000P01001003H...
  • Page 88 GL950A/GL950AM 715G5000P01000003H...
  • Page 89 Key Board 715G5048K0C000004I...

  • Page 90: Appendix 1 - Screw List / Torque

    Appendix 1 – Screw List / Torque Part No. Type Description Quantity Torque 0D1G1030 6120 D3*6 POWER BOARD & MAINFRAME 6 ± 1kgf.cm 0M1G1740 8120 M4*8 POWER BOARD & MAINFRAME 6 ± 1kgf.cm 0D1G1030 6120 D3*6 MAIN/POWER BOARD & MAINFRAME 6 ±...

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