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Acer AL1914 Service Manual

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Acer AL1914
Service Guide
Service guide files and updates are available on the
CSD web: for more information,
Please refer to
http://csd.acer.com.tw/
- 1 -

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  Summary of Contents for Acer AL1914

  • Page 1 Acer AL1914 Service Guide Service guide files and updates are available on the CSD web: for more information, Please refer to http://csd.acer.com.tw/ - 1 -...
  • Page 2 Copyright Copyright © 2003 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Incorporated.
  • Page 3 DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and Service of customer machines.
  • Page 4 WARNING: (FOR FCC CERTIFIED MODELS) NOTE: this equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 5 PRECAUTIONS Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, Swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.
  • Page 6: Special Notes On Lcd Monitors

    SPECIAL NOTES ON LCD MONITORS The following symptoms are normal with LCD monitor and do not indicate a problem. NOTES Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch and then turn it on again to make sure the flicker disappears.
  • Page 7: Table Of Contents

    Table of contents Chapter 1 Monitor Feature …………………………………………………………………...………..8 INTRODUCTION...8 ELECTRICAL REQUIREMEENTS...9 MONITOR BLOCK DIAGRAM ... 23 BLOCK DIAGRAM ... 24 MONITOR BOARD LAYOUT ... 27 SOFTWARE FLOW CHART ... 29 GENERAL INSTRUCTIONS ... 30 SYSTEM INSTALLATION ... 31 POWER/INVERTOR BOARD ... 36 ELECTRICAL SPECIFICATION...
  • Page 8: Chapter 1 Monitor Feature

    This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 20k hours or more. Comparison Chart of AL1914 Panel Signal Interface...
  • Page 9: Electrical Requirements

    Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel Height Adjust ELECTRICAL REQUIREMENTS Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light : Viewing distance : Warrn up time All specifications : Fully functional : Measuring Equipment : Control settings...
  • Page 10: Lcd Monitor General Specification

    v' = 9y/(-2x + 12y + 3) x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] nits = cd/(m 2 ) = Ft-L x 3.426 lux = foot-candle x 10.76 LCD monitor General specification Panel Type: Display size: Display mode: Pixel pitch:...
  • Page 11 Luminance Uniformity: Samsung L / R ≧ 70 / ≧ 70 U / D ≧ 75 / ≧ 60 < 1.3 (max) Samsung < 25 % (max) >70% (min) - 11 -...
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  • Page 13 Pc interface: Signal connector: Audio power: Front control: Interface frequency Horizontal Frequency Vertical Frequency 1).Video: RGB analog 0.7V peak to peak Sync: TTL positive or negative 2) Digital: T.M.D.S. 15 pin Mini D type, (standard VGA video) 24 pin DVI-D. 3.5 mm stereo audio jack (Audio) 0.5Wrms + 0.5Wrms (300Hz –...
  • Page 14: Lcd Panel Specification

    Plug & play: Power Input voltage: Total output power: LCD Panel Specification LCD Panel Model (LG) • Display Type • Resolution • Display Dot • Display Area • Pixel Pitch • Display Color • Lamp Voltage • Lamp Current • Weight •...
  • Page 15 LCD Panel Model (Samsung) • Display Type • Resolution • Display Dot • Display Area • Pixel Pitch • Display Color • Lamp Voltage • Lamp Current • Weight Optical Specifications LCD Panel Model (AU) • Display Type • Resolution •...
  • Page 16 • Pixel Pitch • Display Color • Lamp Voltage • Lamp Current Weight Optical Specifications 0.294mm(H) x 0.294mm(V) 16.2M(RGB 6bit data + FRC data) 700 Vrms (typ) 7.0 mArms (typ) 2700g (Max) - 16 -...
  • Page 17 Panel Relative Humidity Samsung - 17 -...
  • Page 18: Input Signals

    Input Signals Video input • Type • Input Impedance • Polarity • Amplitude • Display Color Sync input • Signal • Polarity Interface frequency The following frequency range is generalized by supported timing. If the entered mode does not match the supported timing the display optimization will not be assured.
  • Page 19: Supported Timing

    Supported Timing TIMING FH(KHZ) SYNC FV(HZ) POLARITY 640x350 31.469 VGA-350 70.087 – 640x400 24.83 – NEC PC9801 56.42 – 640x400 31.469 – VGA-GRAPH 70.087 640x400 31.5 – NEC PC9821 70.15 – 640X480 31.469 VESA-PAL 50.030 640x480 31.469 – VGA-480 59.94 –...
  • Page 20 1280x960 60.00 (60Hz) 60.00 1280x960 70.00 (70Hz) 70.00 1280x960 75.00 (75Hz) 75.00 1280x1024 VESA-1024-60Hz 1280x1024 VESA-1024-75Hz Note: Mode 640x350, 640x400 and 720x400 will locate on middle position but cannot be expanded to full screen on vertical direction. 1800 1280 1000 1800 1280 1000...
  • Page 21 Support Modes There will be 28 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor. 85Hz refresh rate Support Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should display “Out of Range” warning menu at this mode. Video input Connector Analog Video input Connector: 15pins mini D-Sub Table 2.4.5.
  • Page 22 D-sub connector Digital Video Input Connector : DVI – D (T.B.D) Table 2.4.6 Pin assignment for DVI – D Connector: Pin – Assignment of DVI –D connector : TX2- TX2+ Shield (TX2 / TX4) DDC-Serial Clock DDC-Serial Data No Connect *) In case, the power of the PC unit is switched off and the power of the monitor is switched on, no voltage may occur at pin 14.
  • Page 23: Monitor Block Diagram

    MONITOR BLOCK DIAGRAM The LCD monitor will contain an main board, an inverter/ power board, key board and internal adapter which house the flat panel control logic, brightness control logic and DDC. The inverter board will drive the backlight of panel and the DC-DC conversion. The Adapter will provide thr 12V DC-power to inverter/ power board.
  • Page 24: Block Diagram

    BLOCK DIAGRAM System Block Diagram - 24 -...
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  • Page 27: Monitor Board Layout

    Monitor board layout LABEL Component 24LC21A 24LC21A TSU56AJ or TSU16AJ MX10E8050IAQC MAX810 24LC16B APM4461 APL1085-33CE APL1117-1.8V LM4838 LABEL Component D-SVB 15 PIN DVI-D 24 PIN E&T 96113-0803 P-TWO AFN300-N2G1Z 30P E&T 4500-10 E&T 4500-03 E&T 96113-1103 - 27 -...
  • Page 28 LABEL Component SN74LVC14 NT68F633 24LC16B NT68521 APL1085-33CE APL1117-2.5 SI9435 U501 LM4838 LABEL Component D-SVB 15 PIN E&T 96113-0803 E&T 4500-10 CN301 E&T 96113-1103 CN302 E&T 4500-03 P-TWO AFN300-N2G1Z - 28 -...
  • Page 29: Software Flow Chart

    Software flow chart - 29 -...
  • Page 30: General Instructions

    General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. The power cord should be connected. Connect the video cable from the monitor to the video card.
  • Page 31: System Installation

    Connect the power cord to the LCD Monitor. Connect the power cord to an AC power source. Connecting the Audio Cable (For AL1914) Connect the audio cable to the " LINE OUT " jack on your PC's audio card or to the front panel's “AUDIO OUT” jack of your CD ROM drive.
  • Page 32 The step between front bezel and back cover shall be within specification. Top and Bottom Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm Back Cover & Hinge Cover concavity 0mm ≤ B ≤ 0.5mm Left and Right Back cover &...
  • Page 33 Base & Neck concavity 0mm ≤ C ≤ 0.6mm Top and Bottom Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm Left and Right Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm - 33 -...
  • Page 34 LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1.0mm. The distance of the LCD display unit from left side to right should not large than 4.0mm. - 34 -...
  • Page 35: Plastic Material

    Tilt Base Rotation Tilt up 15 ± 2°/ down 5 ±2° Plastic Material For TCO99 Front Bezel PC+ABS Back Cover PC+ABS The Others ABS 94HB For MPRII Front Bezel ABS 94V-0 Back Cover ABS 94V-0 The Others ABS 94HB GAP Spec. Gap between panel with bezel is 0 mm <...
  • Page 36: Power/Invertor Board

    POWER/Inverter Board Description This specification defined the performance and characteristic of power/inverter board. It supplies the following outputs : 1). 5Vdc: Logic power. 2). 5Vaudio: Audio power. 3). 15Vinv: Inverter power. Features Input Voltage: 100 ~ 240 ±10%Vac Input current: 1.2Amax. at 90Vac Input Frequency: 47 ~ 63Hz Input power saving consumption: Less than 1.2W @ minimum load Total output power: 60Wmax...
  • Page 37: Electrical Specification

    2.Inverter-side connecter : ACES 87210-0236 2P P3.5 PIN NO. Function Electrical Specification: AC-DC Electrical specification Input Specification Item Input Voltage Input Frequency Input Current Inrush Current Hold Up Time Turn on time Efficiency Consumption Comment VBLH(High voltage) VBLL(Low voltage) Condition ----- ----- -----...
  • Page 38 AC-DC Output Specification Output Voltage +5Vdc +15Vinv +5Vaudio Ripple Noise 2.Band width is limited 50~100% or 100~50% load change of any DC Dynamic Load Regulation Over / Under Shoot *+5Vdc load regulation test: the +15Vinv loading at 2.0A *+15Vinv load regulation test: the +5Vdc loading at 1.5A Protection function 1) SCP: Short circuit protection must be acted on both outputs 2) OPP: Should be protected when output power consumption is within 60W ~ 75W...
  • Page 39: Inverter Electrical Specification

    Inverter Electrical Specification: For LG Input Voltage Input Current Backlight ON/OFF Control Brightness Adjust Output Voltage Brightness Output Current(Each connector) Frequency Lamp start voltage Striking Time Lamp Current Balance Efficiency Operating Life Time For Samsung Input Voltage Input Current Backlight ON/OFF Control Brightness Adjust Output Voltage Brightness...
  • Page 40 Frequency Lamp start voltage Striking Time Lamp Current Balance Efficiency Operating Life Time For AU Input Voltage Input Current Backlight ON/OFF Control Brightness Adjust Output Voltage Brightness Output Current(Each connector) Frequency Lamp start voltage Striking Time Lamp Current Balance Efficiency Operating Life Time *.The open lamp voltage is testes at output connector terminal @0℃...
  • Page 41: Safety

    SAFETY Leakage Current: 0.25mA @ 100Vac Insulation Resistance: more than 3M ohms while withstanding a voltage of 500Vac Hi-Pot: 3Kvac with using 3mA cut off current - 41 -...
  • Page 42: Power Consumption

    Power Consumption The monitor is equipped with a power-management according to the below. There is a delay of 5s … 7s before the transition from On-state to any power saving state to avoid unintentionally entering of a power saving stage during display resolution and timing mode changes. Transition from any power saving state to another can be instantaneous.
  • Page 43: Chapter 2 Operating Instruction

    Chapter 2 Operating Instructions CONTROLS Control panel (monitor front panel) 1. Power ON/OFF switch, push to ON and push to OFF. (Toggle switch) 2. Power LED will be blue when monitor is on; be amber when in power saving mode. 3.
  • Page 44: Main Osd Menu

    Main OSD Menu: Outline: The description for control function : Main Menu Sub Menu Sub Menu Icon Item Icon Contrast Brightness Focus Clock H. Position V. Position Warm Cool User / Red User / Green User / Blue (option) Description Contrast from Digital-register.
  • Page 45 English Set OSD display language to English. Set OSD display language to 繁體中文 Tranditional Chinese. Deutsch Set OSD display language to German. Français Set OSD display language to French. Español Set OSD display language to Spain. N/A Italiano Set OSD display language to Italian. N/A Set OSD display language to 简体中文...
  • Page 46: Osd Message

    Hot-Key Menu: Outline: The description for Hot-Key function : Item Operation Volume When the OSD is closed, press Left or Right button will be Volume Hot-Key Function OSD Message: Outline: The description for OSD Message : Item Description Auto Config When User Press Hot-Key “Auto”, will show this message, and the monitor do the auto config Please Wait function.
  • Page 47 LOGO: When the monitor is power on, the LOGO will be showed in the center. Item of Factory menu Vendor may customize design and add adjustment items Factory menu as far as all required items are included. 1) Bright Adjust Brightness and Contrast value to Max. 2) Auto Balance Adjust each R, G, B contrast (gain) and offset.
  • Page 48: Plug And Play

    Plug and play Plug & play DDC2B feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
  • Page 49: White Color Temperature

    White Color Temperature White color temperature is 4 preset as 9300, 7500,6500 and User, Default value of user color should be user which is maximum setting for panel. Target of color setting Color Color Coordinate Temp. 9300K 0.283 6500K 0.313 User *) TCO’0X A.2.6.1 requirement User should follow “Microsoft Windows Color Quality Specification for Liquid Crystal Display OEM’s”.
  • Page 50: Speakers

    Electrical characteristics (Tamb=25°) Audio amplifier(USE Panasonic VP-7723A Audio Analyzor. ) Item Audio Input Input Voltage(V) Input Current(m A) Audio Voltage Gain 500m Vrms 1KHz Frequency Response 500m Vrms 300Hz-20KH Signal to Noise ratio 500m Vrms 1KHz Total harmonic distortion 500m Vrms 1KHz Cross talk 500m Vrms 1KHz Output Watt.
  • Page 51: Chapter 3 Machine Disassembly And Replacement

    Chapter 3 Machine Disassembly and Replacement Disassembly Procedure Disassemble the base 1. Remove the neck cover. 2. Remove the four screws to release the hinge. 3. Remove the base Disassemble the chassis 1. Remove the four screws to release the back cover. 2.
  • Page 52 Disassemble the main board 1. Disassemble audio line from power board. 2. Disassemble two VL-VK lines from VL board. 3. Disassemble power line from VL board. 4. Disassemble FPC line from VL board. 5. Remove the one screw to release line from Chassis. 6.
  • Page 53 Disassemble the speakers 1. Remove the two screws to release line and VK board from bezel. 2. Remove the two screws to release line and chassis from bezel. 3. Remove the four screws from bezel.
  • Page 54: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting Main Procedure...
  • Page 55 Power Circuit and Backlights Troubleshooting...
  • Page 56 Performance Troubleshooting...
  • Page 57 Function Troubleshooting...
  • Page 58: Chapter 5 Connector Information

    Connector Information Phonejack stereo PIN1. right : CEE22 typed connector PIN2. Left PIN3. Gnd Video input Connector Analog Video input Connector: 15pins mini D-Sub Table 2.4.5. Pin assignment for D-sub connector : Line-in receptacle PHONEJACK STEREO PIN NO. Chapter 5 Separate Sync RED VIDEO GREEN VIDEO...
  • Page 59: Chapter 6 Fru List

    Service Guide. For ACER-AUTHORIZED CERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts repair and service of customer machines.
  • Page 62: Part List

    Part list Photo Part Name Part No. Hinge Cover FAAR7721000 Base Assy FAAR9913A00 Rear Cover FAAR9912000 Base FAAR9913000 Neck FAAR7713000 Main Shield ECAR9914A00 DA2R877V01A DA2R577V012...
  • Page 63 Power Board to 453AAP300B1 MB cable Samsung: 453AAP300A1 453AAP300B1 Inverter Board Samsung: 453AAP300A1 Front Bezel Keyboard to MB Cable Speaker-R Speaker-L Frame LCD (R) LG/AU: LG/AU: FAAR9911A00 DCO20162300 CG10021V900 CG19921V910 ECAR9915A00 AC6VG190000 AC6VA1901P0 AC6VT1901R5...
  • Page 64 Panel to MB cable Function Board NBX30001040 NBX30001330 454AAPE0001...
  • Page 65: Chapter 7 Schematic Diagram

    Chapter 7 Schematic Diagram...