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Service Guide
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Acer AL2051W
Service Guide
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Service Guide Version and Revision
No. Version Release Date Revision History TPV Model
1 1.0 Dec-15-2005 Initial release TA90KAUHKGAEAP
(Draft Version)
2 2.0 Jan-04-2006 Final Version TA90KAUDBGAFACP
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Copyright
Copyright Š 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.
Disclaimer
The information in this guide is subject to change without notice. Acer Incorporated makes no representations or
warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties
of merchantability or fitness for any particular purpose. Any Acer Incorporated software described in this manual is
sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer
Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any
incidental or consequential damages resulting from any defect in the software.
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Intel is a registered trademark of Intel Corporation.
Pentium and Pentium II/III are trademarks of Intel Corporation.
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Other brand and product names are trademarks and/or registered trademarks of their respective holders.
Trademarks
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Acer is a registered trademark of Acer Incorporated.
All other trademarks are property of their respective owners.
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Conventions
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The following conventions are used in this manual:
Screen messages Denotes actual messages that appear on screen.
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NOTE Gives bits and pieces of additional information related to the current topic.
WARNING Alerts you to any damage that might result from doing or not doing specific
actions.
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CAUTION Gives precautionary measures to avoid possible hardware or software
problems.
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IMPORTANT Remind you to do specific actions relevant to the accomplishment of
procedures.
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Preface
Before using this information and the product it supports, please read the following general information.
1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided
for Acer's "global" product offering. To better fit local market requirements and enhance product competitiveness,
your regional office may have decided to extend the functionality of a machine (e.g. add-on card, modem, or extra
memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such
cases, please contact your regional offices or the responsible personnel/channel to provide you with further
technical details.
2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on
your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in the
printed Service Guide. For ACER-AUTHORIZED SERVICE 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 list
provided by your regional Acer office to order FRU parts for repair and service of customer machines.
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Warning: (For FCC Certified Models)
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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. This equipment generates, uses and can radiate radio frequency energy, and if not
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installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
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and on, the user is encouraged to try to correct the interference by one or more of the following measures:
1. Reorient or relocate the receiving antenna.
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2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experienced radio/TV technician for help.
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Notice:
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1. The changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits.
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3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to
this equipment. It is the responsibility of the user to correct such interference.
As ENERGY STARŽ Partner our company has determined that this product meets the ENERGY STARŽ
guidelines for energy efficiency.
Warning:
To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerous high voltages are
present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.
4
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. Use only a trolley or stand recommended by the manufacturer or sold
with the monitor. If you mount the monitor on a wall or shelf, uses a mounting kit approved by the manufacturer
and follow the kit instructions.
Slots and openings in the back and bottom of the cabinet are provided for ventilation. To ensure reliable
operation of the monitor and to protect it from overheating, be sure these openings are not blocked or covered.
Do not place the monitor on a bed, sofa, rug, or similar surface. Do not place the monitor near or over a radiator
or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided.
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of
the type of power supplied to your home, consult your dealer or local power company.
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The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit
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only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug,
have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the
safety purpose of the grounded plug.
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Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the
monitor from damage due to power surges.
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Do not overload power strips and extension cords. Overloading can result in fire or electric shock.
Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric
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shock. Never spill liquids on the monitor.
Do not attempt to service the monitor yourself; opening or removing covers can expose you to dangerous
voltages and other hazards. Please refer all servicing to qualified service personnel
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To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
configured receptacles marked between 100 - 240V AC, Min. 5A.
The wall socket shall be installed near the equipment and shall be easily accessible.
For use only with the attached power adapter (Output 12Vdc), which has UL, CSA listed license.
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Special Notes On LCD Monitors
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The following symptoms are normal with LCD monitor and do not indicate a problem.
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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.
You may find slightly uneven brightness on the screen depending on the desktop pattern you use.
The LCD screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such as a
missing pixel or a pixel lit all of the time.
Due to the nature of the LCD screen, an afterimage of the previous screen may remain after switching the image,
when the same image is displayed for hours. In this case, the screen is recovered slowly by changing the image
or turning off the Power Switch for hours.
5
Table Of Contents
Chapter 1 Monitor Features ............................................. 6
Introduction ............................................. 7
Electrical Requirements ............................................. 8
LCD Monitor General Specification ............................................. 9
LCD Panel Specification ............................................. 10
Support Timing ............................................. 11
Block Diagram ............................................. 12
Main Board Diagram ............................................. 13
Software Flow chart ............................................. 14
Main Board Layout ............................................. 16
Front Bezel ............................................. 17
Rear Bezel ............................................. 18
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Chapter 2 Operating Instructions ............................................. 19
External Controls ............................................. 19
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Front Panel Controls ............................................. 20
Adjusting the picture ............................................. 21
Hot-Key Menu ............................................. 24
OSD Message
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Logo ............................................. 25
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Chapter 3 Machine Disassembly ............................................. 26
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Chapter 4 Troubleshooting ............................................. 34
Chapter 5 Connector Information ............................................. 40
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Chapter 6 FRU (Field Replacement Unit) List ............................................. 41
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Exploded Diagram ............................................. 42
Chapter 7 Schematic Diagram ............................................. 46
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Main Board ............................................. 46
Power/Inverter Board ............................................. 53
6
Monitor Features Chapter 1
Introduction
Scope
This specification defines the requirements for the 20" MICROPROCESSOR based Multi-mode supported high
resolution color LCD monitor. This monitor can be directly connected to general 15 pin D-sub VGA connector and 24
pin DVI connector. It also supports VESA DPMS power management and plug & play function. There is a build-in
stereo audio amplifier with OSD control to drive a pair of speakers.
Description
The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no
radiation. 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 50k hours or more.
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Chart of AL2051W
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20" AUO M201EW01 V.2
Panel
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D-SUB
Signal Interface
DVI
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Sync Type Separate / Compatible
Color Temp User Adjust Support
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DDC DDC2B
Speaker Yes
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Headphone Jack Yes
Microphone Jack No
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USB Hub Not support
Tilt / Swivel Yes / No
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Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light : Dark room (<1cd/m2)
Viewing distance : 40 cm for LCD performance, 20 cm for LCD failures
Warm up time
All specifications : 30 minutes
Fully functional : 5 seconds
Measuring equipment : Chroma 7120 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
Control settings
User brightness control : Set to Factory preset value (cut off raster)
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User contrast control : T Set to factory preset value, which allows that the brightest two
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of 32 linear distributed gray-scales (0 700mv) can be
distinguished.
User red/white balance,
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Green/white balance and In the center (unless otherwise specified)
Blue/white balance control :
Power input :
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230V 5 , 50 3 Hz
Ambient temperature : 20+5
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Measurement systems
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The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
1 tesla = 10,000 gauss
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cm = in x 2.54
Lb = kg x 2.2
Degrees F = [°C x 1.8] + 32
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Degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
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v' = 9y/(-2x + 12y + 3)
x = (27u'/4)/[(9u'/2) - 12v' + 9]
y = (3v')/[(9u'/2) - 12v' + 9]
nits = cd/(m2) = Ft-L x 3.426
lux = foot-candle x 10.76
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LCD Monitor General Specification
Panel type 20.1 inch-wide Color TFT-LCD Module
M201EW01.
Display size 433.44 (H) x 270.90(V)
Display mode VGA : 640 480 (60/72/75/85 Hz)
SVGA : 800 600 (56/60/72/75/85 Hz)
XGA : 1024 768 (60/70/75/85 Hz)
SXGA : 1280 1024 (60/75/85Hz)
WSXGA: 1680 x 1050 (60Hz)
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WSXGA: 1680 x 1050 (75Hz) D-SUB only
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Pixel pitch 0.258 (per one triad) x 0.258
Pixels (H x V) 1680(x3) x 1050
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Pixel clock 202 MHz (Max)
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Contrast ratio 800: 1 (Typ)
Brightness 300 cd/m2 @6mA (Typ)
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Response time (Tr/Tf) 16 ms
Display color 16.7M colors (RGB 8-bit data)
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Viewing angle 176 /176
Pc interface RGB Analog Interface
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Digital interface
Signal connector D-Sub 15pin
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DVI-D 24pin
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Interface frequency Horizontal Frequency 30KHz ----91KHz
Vertical Frequency 55Hz ------85Hz
Plug & play VESA DDC2B, VESA DPMS
Power Input voltage 230V 5 , 50 3 Hz
Total output power 49Watt max.
Weight Unpacked: 5.4 Kg Packed: 7.3 Kg
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LCD Panel Specification
LCD Panel Model (AU M201EW01)
Display Type active matrix color TFT LCD
Resolution 1680 x 1050
Display Dot 1680(x3) x 1050
Display Area 433.44mm(H) x 270.90mm(V)
Pixel Pitch 0.258mm(H) x 0.258mm(V)
Display Color 16.7M (true)
Lamp Frequency 50kHz(Max.)
Lamp Current 6.0 mArms (typ)
Weight 2950g (typ)
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Optical Specifications
The optical characteristics are measured under stable conditions at 25 :
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Supported Timing
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Support Modes
There will be 20 total support modes to accommodate the above mode and other video modes within the frequency
range of the monitor.
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Monitor Block Diagram
The LCD monitor will contain a main board, a power board, which house the flat panel control logic, brightness
control logic and DDC.
The Inverter board will drive the backlight of panel.
CCFL Drive. Flat Panel and
CCFL backlight
Power Board RS232 Connector For
Main Board
(Include: Inverter and white balance adjustment
(Include: Audio and Keypad board)
adapter board) in factory mode
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AC-IN
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Host Computer Video signal, DDC
100V-240
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Main Board Diagram
Panel connector
(CN407)
OSD Control
KEY PAD
MST9251A-LF-205
MCU (Include: ADC, OSD etc) Frame
W79E632 (U401) Memory
(U402) (U303)
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EPR_SDA
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RXD H sync
EPR_SCL RGB DVI Video Signal
TXD V sync
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EEPROM
D-Sub Connector DVI Connector
AT24C16AN-10SU-2.7
(CN101) (CN102)
(U403)
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DB15_SDA DVI_SDA
DB15_SCL DVI_SCL
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EEPROM EEPROM
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M24C02-WMN6TP M24C02-WMN6TP
(U101) (U102)
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Software Flow Chart
1
Y
2 3
N
4
N
5
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Y
6
N
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8
Y
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N
10 11
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Y
N N
12 13
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Y Y
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N
14 15 16
Y
17
N
18 19
Y
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Remark:
1) MCU initializes.
2) Is the EEPROM blank?
3) Program the EEPROM by default values.
4) Get the PWM value of brightness from EEPROM.
5) Is the power key pressed?
6) Clear all global flags.
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7) Are the AUTO and SELECT keys pressed?
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8) Enter factory mode.
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9) Save the power key status into EEPROM.
Turn on the LED and set it to green color.
Scalar initializes.
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10) In standby mode?
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11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
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13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
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15) Are there any signals coming from analog port?
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16) Display "No connection Check Signal Cable" message. And go into standby mode after the
message disappears.
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17) Program the scalar to be able to show the coming mode.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?
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Main Board Layout
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Label Part No. Description
CN603 88G 30211K PHONE JACK 5PIN
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CN602 88G 30214K PHONE JACK 5PIN
CN701 88G 3041CE DC JACK 3PIN
CN101 88G 35315F H D-SUB 15PIN
CN102 88G 35424F H DVI CONNECTOR 24PIN
X401 93G 22 53 CRYSTAL 14.318MHzHC-49U
X402 93G 22 55 H 20MHZ/20PF/49US
U401 56G 562120 MST9251A-LF-205
U402 56G1125170AC1 W79E632 BY WINBOND
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Front Bezel
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External Controls
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Item Description Item Description
1. >/ Volume 4. MENU/ENTER
2. ://
3. Power Key/Power Indicator
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Rear Bezel
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Item Description Item Description
1. D-SUB Cable 4. External Adapter
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2. DC-Jack Power Cable 5. DVI Cable
3. AC Power Cord 6. Audio Cable
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Operating Instructions Chapter 2
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.
ˇ The power cord should be connected.
ˇ Connect the video cable from the monitor to the video card.
ˇ Press the power button to turn on the monitor position. The power indicator will light up.
External Controls
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Item Description Item Description
1. >/ Volume 4. MENU/ENTER
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2. 3. LED/Power Key
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Front Panel Control
ˇ Power Button:
Press this button to turn the monitor ON or OFF, and display the monitor's state.
ˇ Menu / Enter:
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD
menu when in Volume Adjust OSD status.
ˇ Activates the volume control when the OSD is OFF or navigates through adjustment icons when OSD is ON or
adjust a function when function is activated.
ˇ >/Volume:
Activates the volume control when the OSD is OFF or navigates through adjustment icons when OSD is ON or
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adjusts a function when function is activated.
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ˇ Auto Adjust button / Exit:
1. When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu).
2.When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function.
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The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
ˇ Power Indicator:
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Blue -- Power On mode.
Orange --Power Off mode
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NOTES
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Notes
ˇ Do not install the monitor in a location near heat sources such as radiators or air ducts, or in a place subject to
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direct sunlight, or excessive dust or mechanical vibration or shock.
ˇ Save the original shipping carton and packing materials, as they will come in handy if you ever have to ship your
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monitor.
ˇ For maximum protection, repackage your monitor as it was originally packed at the factory.
ˇ To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be removed with a
cloth lightly dampened with a mild detergent solution. Never use strong solvents such as thinner, benzene, or
abrasive cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor
before cleaning it.
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Adjusting the Picture
a. How to Adjust a Setting
1. Press the MENU-button to activate the OSD window.
2. Press to select the desired function.
3. Press the MENU-button to select the function that you want to adjust.
4. Press < or >to change the settings of the current function.
5. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-4.
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Analog Input only model
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Dual-Input Model, Analog Signal Input
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Dual-Input Model, Digital Signal Input
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b. The Description For Control Function
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Hot-Key Menu
a. Outline
b. The Description For Hot-Key Function
Item Operation Icon Description
When the OSD is closed, press Left or
Volume of Audio adjustment. The Audio will be
Volume Right button will be Volume Hot-Key
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Mute when volume=0
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Function
OSD Message
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a. Outline
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b. The Description For OSD Message
Item Description
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Auto Config When Analog signal input, if User Press Hot-Key "Auto", will show this message, and the
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Please Wait monitor do the auto config function.
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Input Not When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor
Supported support range, will show this message. This message will be flying.
Cable Not Analog-Only Model: When the video cable is not connected, will show this message.
Connected This message will be flying.
Analog-Only Model: When the video cable is connected, but there is no active signal
No Signal
input, will show this message, then enter power saving.
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Logo
When the monitor is power on, the LOGO will be showed in the center, and disappear slowly.
How To Optimize The DOS-Mode
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.
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The DDC2B is a bi-directional data channel based on the I˛C protocol. The host can request EDID information over
the DDC2B channel.
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This monitor will appear to be non-functional if there is no video input signal. In order for this monitor to
operate properly, there must be a video input signal.
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This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA)
and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees
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(NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no
video-input signal present. When there is no video input signals this monitor, following a time-out period, will
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automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the
video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is
similar to a "Screen Saver" feature except the display is completely off. Pressing a key on the keyboard, or clicking
the mouse restores the display.
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Using The Right Power Cord
The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL
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listed and CSA labeled. The voltage rating for the power cord shall be 125 volts AC.
Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting
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of a minimum No. 18 AWG, type SJT or SVT three conductors flexible cord. One end terminates with a grounding
type attachment plug, rated 10A, 250V, and CEE-22 male configuration. The other end terminates with a
molded-on type connector body, rated 10A, 250V, having standard CEE-22 female configuration.
Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European
counties.
25
Machine Disassembly Chapter 3
This chapter contains step-by-step procedures on how to assemble the monitor for
maintenance.
Disassembly Procedure
The back view
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1. Remove two screws. (Fig 1)
2. Remove the hinge cover. (Fig 2)
3. Remove the one screw. (Fig 3)
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Fig 1
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Fig 2
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Fig 3
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4. Firstly, find out the two hooks position. (Fig 4)
5. Then, pry the rear cover up as arrowhead direction. (Fig 5)
6. Remove the six screws. (Fig 6)
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Fig 4
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Fig 5
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Fig 6
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7. Disconnect the wire harnesses of main board and panel, main board and power board. (Fig 7)
8. Remove four screws. (Fig 8)
9. Pry the main frame on the left to remove bezel. (Fig 9.1)
Pry the main frame on the right to remove bezel. (Fig 9.2)
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Fig 7
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Fig 8
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Fig 9.1
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Fig 9.2
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10. Remove the screws for frame on the left. (Fig 10.1)
Remove the screws for frame on the right. (Fig 10.2)
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Fig 10.1
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Fig 10.2
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11. Disconnect the wire harness for power board and lamps. (Fig 11)
12. Remove the four screws to remove the main board. (Fig 12)
13. Remove the eight screws to remove BKT base. (Fig 13)
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Fig 11
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Fig 12
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Fig 13
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14. Remove the two screws to loose the copper manganese wire. (Fig 14)
15. Remove the four screws and disconnect the wire harness. (Fig 15)
16. Remove the four screws. (Fig 16)
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Fig 14
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Fig 15
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Fig 16
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17. Turn the six clips anticlockwise to remove the shielding. (Fig 17)
18. Disconnect the wire harness of main board and panel. (Fig 18) The end!!
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Fig 17
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Fig 18
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Troubleshooting Chapter 4
This chapter provides troubleshooting information for the AL2051W:
1. Main board
No power
No power
Press power key and look
if the picture is normal
NG
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Please reinsert and make sure
the AC of 100-240 is normal
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NG Reinsert or check the
OK
Adapter/Inverter
section
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Measure U703 PIN2=1.8V
U705 PIN2=3.3V
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NG Check CN201 or replace
OK U703, U705
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X401 and X402 oscillate
waveforms are normal
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NG
OK Replace X401, X402
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Replace U402
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NG
Replace U401
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No picture (LED orange)
No picture
The button if under NG NG
X401oscillate
Replace X401
control waveform is normal
OK
OK
Check reset circuit of NG Check Correspondent
U402 is normal component
Measure U703 PIN2=1.8V
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U705 PIN2=3.3V OK
Replace U402
OK
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X402 oscillate NG
waveform is normal
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Replace U703, U705
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NG
OK
Replace X402
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Check HS/VS from
CN407 is normal
NG
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OK Check Correspondent
component
Replace U401
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White screen
White screen
NG
Measure Q701 base X401 oscillate
is high level? waveform is normal
OK NG Replace X401
OK
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Check Q701, Q702 is Check reset circuit of
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broken or CN407 solder? U402 is normal
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NG Check Correspondent
Check Correspondent NG
component.
component.
OK
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OK
Replace U402
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Replace Panel
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Note: 1. If Replace "MAIN-BOARD", Please re-do "DDC-content" programmed & "WHITE-Balance".
2. If Replace " PWPC" only, Please re-do " WHITE-Balance"
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2. Power Board
No power
No power
Check AC line volt 110V or 220V
NG
OK Check AC line
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Check the voltage of C904(+)
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OK NG
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
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OK NG
Check R903, R904,IC901
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Check the auxiliary voltage is between 10V-16V
OK
NG Check Q902,Q903
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Check T901, D902
Check D904, D905,IC902
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3. Inverter Board
No backlight
Check L805 =12V
NG
OK
Check adapter board
Check ON/OFF signal
OK NG Check main board
Check IC801 PIN5=5V+ -0.25V
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NG
OK
Check Q802,Q804,ZD803 circuit
Check IC801 PIN18 triangular wave is normal
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OK NG
Check R821,C821
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Check IC801 PIN11, 12,19,20
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OK NG
Check feedback
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End no output debug
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Keypad Board
OSD is unstable or not working
N
Is Keypad Board connecting normally? Connect Keypad Board
Y
N
Is Button Switch normally? Replace Button Switch
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N
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Is Keypad Board Normally? Replace Keypad Board
Y
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Check Main Board wj
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Connector Information Chapter 5
The following figure shows the connector locations on the monitor:
1 5
6 10
11 15
15 Pin Color Display Signal Cable (D-sub)
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Logic Ground
3. Blue 11. Monitor Ground
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4. Monitor Ground 12. DDC-Serial Data
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5. DDC-Return 13. H-Sync
6. R-Ground 14. V-Sync
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7. G-Ground 15. DDC-Serial Clock
8. B-Ground wj
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24 Pin Color Display Signal Cable (DVI)
Pin No. Description Pin No. Description
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1. TMDS Data2- 13. TMDS Data3+
2. TMDS Data2+ 14. +5V Power
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3. TMDS Data 2/4 Shield 15. Ground
4. TMDS Data4- 16. Hot Plug Detect
5. TMDS Data4+ 17. TMDS Data0-
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6. DDC Clock 18. TMDS Data0+
7. DDC Data 19. TMDS Data 0/5 Shield
8. Analogue Vertical Sync 20. TMDS Data5-
9. TMDS Data1- 21. TMDS Data5+
10. TMDS Data1+ 22. DDC Clock Shield
11. TMDS Data 1/3 Shield 23. DDC Clock+
12. TMDS Data3- 24. DDC Clock-
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FRU (Field Replaceable Unit) List Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL2051W.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/). For whatever reasons a part number
change is made, it will not be noted in the printed Service Guide. For ACER AUTHORIZED SERVICE
PROVIDERS, your Acer office may have a DIFFERENT part number code from 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 for repair and service of customer machines.
NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on
how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.
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Exploded Diagram (Model: AL2051W)
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Part List
Above picture show the description of the following component.
Item Picture Description Part No.
HINGE COVER-F 33G4967 QW L
1
HINGE COVER-B 33G4968 QT L
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2 BEZEL 34G1782AQW B
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3 BACK COVER 34G1784 QU B
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4 MAIN FRAME 15G8290 1
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5 SHIELDING 85G 732 1
6 PANEL 750GLUA1W1211N
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7 MAIN BOARD AICA90KAUAEP
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8 POWER BOARD ADPC1260AXP
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9 INPC BOARD INPC2062AUA1P
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10 SPEAKERS 78G 322 3B
11 BASE 34G1785 QW B
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BASE BACK COVER 33G4965AQT 1L
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13 HINGE HOLDER 20G 041 1
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Schematic Diagram Chapter 7
Main Board
MST9251A SCHEMATIC
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B2
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B1