Acer AL2051W User manual

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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
2
1.0
2.0
Dec-15-2005
Jan-04-2006
Initial release
(Draft Version)
Final Version
TA90KAUHKGAEAP
TA90KAUDBGAFACP
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Copyright
Copyright © 2006by 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.
Intel is a registered trademark of Intel Corporation.
Pentium and Pentium II/III are trademarks of Intel Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.
Trademarks
Acer is a registered trademark of Acer Incorporated.
All other trademarks are property of their respective owners.
Conventions
The following conventions are used in this manual:
Screen messages Denotes actual messages that appear on screen.
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.
CAUTION Gives precautionary measures to avoid possible hardware or software
problems.
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,you shouldcheck 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.
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. This equipment generates, uses and can radiate radio frequency energy, and if not
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
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.
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.
Notice:
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.
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 STAR®Partner our company has determined that this product meets the ENERGY STAR®
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.
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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.
The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit
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.
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.
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
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
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
configured receptacles marked between 100 - 240VAC, 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.
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.
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.
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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
Chapter 2 Operating Instructions ……………………………………… 19
External Controls ……………………………………… 19
Front Panel Controls ……………………………………… 20
Adjusting the picture ……………………………………… 21
Hot-Key Menu ……………………………………… 24
OSD Message ……………………………………… 24
Logo ……………………………………… 25
Chapter 3 Machine Disassembly ……………………………………… 26
Chapter 4 Troubleshooting ……………………………………… 34
Chapter 5 Connector Information ……………………………………… 40
Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 41
Exploded Diagram ……………………………………… 42
Chapter 7 Schematic Diagram ……………………………………… 46
Main Board ……………………………………… 46
Power/Inverter Board ……………………………………… 53
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Monitor Features
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 VGAconnector 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.
Chart of AL2051W
Panel 20” AUO M201EW01 V.2
D-SUB
Signal Interface DVI
Sync Type Separate / Compatible
Color Temp User Adjust Support
DDC DDC2B
Speaker Yes
Headphone Jack Yes
Microphone Jack No
USB Hub Not support
Tilt / Swivel Yes / No
Cha
p
ter 1
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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)
User contrast control : T Set to factory preset value, which allows that the brightest two
of 32 linear distributed gray-scales (0 ～700mv) can be
distinguished.
User red/white balance,
Green/white balance and
Blue/white balance control :
In the center (unless otherwise specified)
Power input :230V±5％,50±3 Hz
Ambient temperature :20+5℃
Measurement systems
The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
1 tesla = 10,000 gauss
cm = in x 2.54
Lb = kg x 2.2
Degrees F = [°C x 1.8] + 32
Degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
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)
WSXGA: 1680 x 1050 (75Hz) D-SUB only
Pixel pitch 0.258 (per one triad) x 0.258
Pixels (H x V) 1680(x3) x 1050
Pixel clock 202 MHz (Max)
Contrast ratio 800: 1 (Typ)
Brightness 300 cd/m2 @6mA (Typ)
Response time (Tr/Tf) 16 ms
Display color 16.7M colors (RGB 8-bit data)
Viewing angle 176°(H)/176°(V)
Pc interface RGB Analog Interface
Digital interface
Signal connector D-Sub 15pin
DVI-D 24pin
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
 DisplayDot 1680(x3) x 1050
 Display Area 433.44mm(H) x 270.90mm(V)
 PixelPitch 0.258mm(H)x0.258mm(V)
 DisplayColor 16.7M(true)
 Lamp Frequency 50kHz(Max.)
 LampCurrent 6.0mArms(typ)
 Weight 2950g (typ)
Optical Specifications
The optical characteristics are measured under stable conditions at 25℃:
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Supported Timing
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.
Video signal, DDC
Power Board
(Include: Inverter and
adapter board)
Flat Panel and
CCFL backlight
Main Board
(Include: Audio and Keypad board)
RS232 Connector For
white balance adjustment
in factory mode
Host Computer
CCFL Drive.
AC-IN
100V-240
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Main Board Diagram
MCU
W79E632
(U402)
MST9251A-LF-205
(Include: ADC, OSD etc)
(U401)
EEPROM
AT24C16AN-10SU-2.7
(
U403
)
D-Sub Connector
(CN101)
EEPROM
M24C02-WMN6TP
(
U101
)
RGB
DB15_SDA
DB15_SCL
EPR_SDA
EPR_SCL
Panel connector
(CN407)
OSD Control
KEY PAD
Frame
Memory
(U303)
DVI Connector
(CN102)
EEPROM
M24C02-WMN6TP
(
U102
)
DVI_SDA
DVI_SCL
H sync
V sync
RXD
TXD DVI Video Signal
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Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N16
17
19
Y
N
18
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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.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EEPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the
message disappears.
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
1
Label Part No. Description
CN603 88G 30211K PHONE JACK 5PIN
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
External Controls
Item Description Item Description
1. >/ Volume 4. MENU/ENTER
2. </ Volume 5. Auto Adjust Key/Exit
3. Power Key/Power Indicator
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Rear Bezel
Item Description Item Description
1. D-SUB Cable 4. External Adapter
2. DC-Jack Power Cable 5. DVI Cable
3. AC Power Cord 6. Audio Cable
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OperatingInstructions
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.
•Press the power button to turn on the monitor position. The power indicator will light up.
ExternalControls
Item Description Item Description
1. >/ Volume 4. MENU/ENTER
2. </ Volume 5. Auto Adjust Key/Exit
3. LED/Power Key
Cha
p
ter 2
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Front Panel Control
•Power Button:
Press this button to turn the monitor ON or OFF, and display the monitor’s state.
•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.
•<Volume:
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.
•>/Volume:
Activates the volume control when the OSD is OFF or navigates through adjustment icons when OSD is ON or
adjusts a function when function is activated.
•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.
The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
•Power Indicator:
Blue — Power On mode.
Orange —Power Off mode
NOTES
Notes
•Do not install the monitor in a location near heat sources such as radiators or air ducts, or in a place subject to
direct sunlight, or excessive dust or mechanical vibration or shock.
•Save the original shipping carton and packing materials, as they will come in handy if you ever have to ship your
monitor.
•For maximum protection, repackage your monitor as it was originally packed at the factory.
•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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