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Acer AL1912 Service Manual

Acer lcd computer monitor service guide
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Acer AL1912
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 AL1912

  • Page 1 Acer AL1912 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

    MAIN OSD MENU... 31 OSD MESSAGE... 33 PLUG AND PLAY ... 35 WHITE COLOR TEMPERATURE... 36 AUDIO TECHNICAL SPECIFICATION (FOR AL1912 m ONLY) ... 36 SPEAKERS ... 37 Chapter 3 Machine Disassembly and Replacement …………………………………..…………38 DISASSEMBLY PROCEDURE ... 38 Chapter 4 Troubleshooting …………………………………………………………………………..41 TROUBLESHOOTING ...
  • 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 AL1912 m/AL1912 Panel Signal Interface...
  • Page 9: Electrical Requirements

    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 User brightness control : User contrast control: User red/white balance, Green/white balance and...
  • Page 10: Lcd Monitor General Specification

    Sync: TTL positive or negative 15 pin Mini D type, (standard VGA video) 3.5 mm stereo audio jack (Audio) (For AL1912 m only) 0.5Wrms + 0.5Wrms (300Hz – 10kHz (S.P.L. – 10 dB))(AL1912 m only) power on/off with LED select adjustment (+,-) 24KHz --80KHz...
  • Page 11 Total output power: LCD Panel Specification LCD Panel Model (Hydis LT17E12-200) • Display Type • Resolution • Display Dot • Display Area • Pixel Pitch • Display Color • Lamp Voltage • Lamp Current • Weight • Optical Specifications 60 Watt max. active matrix color TFT LCD 1280x1024 pixels 1280x (RGB) x 1024...
  • Page 12: 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 13: Supported Timing

    Supported Timing FH(KHZ) SYNC TIMING 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 14 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 15: 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 16: Block Diagram

    BLOCK DIAGRAM System Block Diagram LVDS Signals MVPRL including ADC, Scaling LVDS And OSD function - 16 -...
  • Page 17: Monitor Board Layout

    Monitor board layout LABEL Component 74LVC14 24LVC21 MVPRL M8064I 24LC16B MAX810 SI9435 LM4838 APL1085-3.3 CE APL1117-2.5 VC LABEL Component D-SVB 15 PIN E&T 4501-10 E&T 6113-08 CN301 E&T 4501-11 CN302 E&T 4501-03 E&T DF14-30 - 17 -...
  • Page 18: Software Flow Chart

    Software flow chart - 18 -...
  • Page 19: General Instructions

    Connect the video cable from the monitor to the video card. Press the power button to turn on the monitor position. The power indicator will light up. External Controls Auto Adjust Key/Exit </ Volume >/ Volume MENU/ENTER / Power Key - 19 - AL1912 m AL1912...
  • Page 20: System Installation

    Connect the power cord to an AC power source. Connecting the Audio Cable (For AL1912 m and AL1912 bm) 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 21 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 22 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 - 22 -...
  • Page 23 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. - 23 -...
  • Page 24: 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 25: 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 26: Electrical Specification

    2.Inverter-side connecter : SM02B-BHSS-1-TB(JST) for AL1912 m / SM02(8.0)B-BHS-1(JST) for AR599 or equivalent. 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...
  • Page 27 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 28: Inverter Electrical Specification

    Inverter Electrical Specification: For Fujitsu FLC488SC8V-10 (AL1912 m) 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 SAFETY Leakage Current: 0.25mA @ 100Vac...
  • Page 29: 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 30: 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 31: 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 Description Contrast from Digital-register. Backlight Adjustment Adjust Picture Phase to reduce Horizontal-Line noise Adjust picture Clock to reduce Vertical-Line noise.
  • Page 32 User / Red Red Gain from Digital-register. User / Green Green Gain Digital-register. User / Blue Blue Gain from Digital-register. 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.
  • Page 33: Osd Message

    Hot-Key Menu:(For AL1912 m only) 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...
  • Page 34 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 35: 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 36: White Color Temperature

    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”. (http://www.microsoft.com/hwdev/tech/color/ColorTest.asp) Audio Technical specification (For AL1912 m only) General Description: Output power Total harmonic distortion Input signal sensitivity Input impedance...
  • Page 37: 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 38: 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 39 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 40 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 41: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting Main Procedure...
  • Page 42 Power Circuit and Backlights Troubleshooting...
  • Page 43 Performance Troubleshooting...
  • Page 44 Function Troubleshooting...
  • Page 45: 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 46: Chapter 6 Fru List

    FRU (Field Replaceable Unit) list This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1912 m. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). NOTE : Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel(http://aicsl.acer.com.tw/spl/).
  • Page 47 Model: AL1912...
  • Page 48 Model:AL1912 m...
  • Page 49: Part List

    Part list Photo Part Name Hinge Cover Base Assy Rear Cover Base Neck Main Shield Part No. FAAR7721000 FAAR9913A00 FAAR9912000 FAAR9913000 FAAR7713000 ECAR9914A00 DA2P577V012...
  • Page 50 Power Board to MB cable Inverter Board Front Bezel Keyboard to MB Cable Speaker-R Speaker-L Frame LCD (R) 599: 453AAP30021 598: 453AAP30031 599: 453AAP30021 598: 453AAP30031 FAAR9911A00 599: DCO20162300 598: DCO20162500 CG10021V900 CG19921V910 ECAR9915A00 AC6VF190010...
  • Page 51 Panel to MB cable DC020162600 599: 454AAPE0001 Function Board 598: 454AAP30011...
  • Page 52: Chapter 7 Schematic Diagram

    Chapter 7 Schematic Diagram...

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