Acer AL2021 User manual

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Acer AL2021
Service Guide
Service guide files and updates are available on the
CSD web: for more information,
Please refer to http://csd.acer.com.tw/
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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.
Disclaimer
The information in this guide is subject to change without notice. Acer Incorporated makes no representations or
warranties, either expresses 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, of its dealer) assumes the entire cost of all necessary servicing, repair,
and any incidental or consequential damages resulting from any defect in the software.
Acer is a registered trademark of Acer Corporation.
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.
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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 Reminds 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 BASICCONFIGURATION
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 not 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)
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 an ENERGY STAR® Partner our company has determined that this product meets the ENERGY STAR®
guidelines for energy efficiency.
WARNING:
To prevent fire or chock hazard, do not expose the monitor to rain or moisture. Dangerously 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 manufacture or
sold with the monitor. If you mount the monitor on a wall or shelf, use a mounting kit approved by the
manufacture and follow the kit instructions.
 Slots and openings in the back and bottom of the cabinet area 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 100-240V AC, Min. 3.5A.
 The wall socket shall be installed near the equipment and shall be easily accessible.
 For use only with the attached power adapter (output 12V DC) which have UL,CSA listed license
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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 in 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 FEATURE ………………………………………………………….9
Chapter 2 OPERATING INSTRUTION …………………………………………………….15
Chapter 3 Machine assembly ……………………………………………………………22
Chapter 4 TROBLE SHOOTING ………………………………………………………….32
Chapter 5 CONNECTOR INFORMATION ……………………………………………….34
Chapter 6 FRU LIST ………………………………………………………………………..36
Chapter 7 SCHEMATIC DIAGRAM …………………………………………………………40
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Chapter 1
Monitor Feature
Driving system TFT Color LCD
Size 20.1"
Pixel pitch 0.255 mm
Viewable angle 85(H) x 85 (V) degree
Brightness 250 cd/m2(typ)
Contrast Ratio 600:1 (typ)
LCD Panel Response time 20ms (Tr+Tf)
Video R,G,B Analog
Input Separate Sync H/V TTL
H-Frequency 31-81KHZ
V-Frequency 56-75HZ
Display Color 16.7 million Colors
Maximum Dot Clock ® 135MHz
Max Resolution 1600x1200@60HZ
Plug & Play VESA DDC2B
ON Mode <58W
EPA ENERGY STAY OFF Mode <3W
Audio output Rated Power 2.0W rms(Per channel)
D-Sub 15 pin
Input Connector DVI-D 24 pin
Analog : 0.7Vp-p,75OHM
Input Video Signal Digital TMDS , 100OHM
Horizontal : 408mm
Maximum Screen Size Vertical : 308mm
Power Source 90~240 Vac, 50~60HZ
Environmental
Considerations
Operating Temp : 0 to 40 degree ; Altitude:3000mm
Storage Temp : -20 to 60 degree ; Altitude :12000mm
Operating Humidity : 5% to 90%
Weight (N.W.) 9.2kg
Dimension 460(W) x 474(H) x 135(D) mm
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Switch
* Power Switch
* MENU/ENTER
* >/ Volume
* </ Volume
* Auto Adjust KEY
External Controls :
Function * Contrast/brightness
* Focus / Clock
* H. / V.Position
* COLOR
* Language
* OSD SETTING : H / V. Position & Timeout
* Input Signal Selection
* Information
* Reset
* Exit
Regulatory Compliance UL, CSA, FCC, TUV/GS, CE, TCO03, ISO13406-2
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PRESET TIMING
Fv Fh
#mode Resolution Hz (KHz)
1 IBM VGA 720 x 400 70 31.46
2 VESA 640 x 480 60 31.46
3 MAC 13” 640 x 480 67 35
4 VESA 640 x 480 72 37.86
5 VESA 640 x 480 75 37.5
6 VESA 800 x 600 56 35.16
7 VESA 800 x 600 60 37.87
8 VESA 800 x 600 72 48.07
9 VESA 800 x 600 75 46.87
10 MAC 16” 832 x 624 75 49.72
11 VESA 1024 x 768 60 48.36
12 VESA 1024 x 768 70 56.48
13 VESA 1024 x 768 75 60.02
14 VESA 1152 x 864 75 67.5
15 VESA 1280 x 1024 60 63.98
16 VESA 1280 x 1024 75 79.97
17 VESA 1600 x 1200 60 75
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Monitor Block Diagram
DVI INPUT
( CN8 )
DIGITAL DDC
24AA02 (U12)
SDA/SCL
RX2 , RX1, RX0 , RXC
VGA INPUT
( CN7 ) RED , GREEN , BLUE , SDA/SCL
ANALOG DDC
24AA02 (U10)
SDA/SCL
+1.8V_CORE
+3.3V_ I/O_MALIBU
+3.3V_LBADC
+2.5V_DDR
+3.3V_LVDSB
+3.3V_LVDSA
+3.3V_LVDS
+1.8V_DVI
+3.3V_DVI
+1.8V_ADC
+3.3V_ADC
+3.3V_PLL
FRAME STORE
MT46V2M32LG-4 ( U1 )
FSDATA,FSADDR, FSBKSEL0/1
FSCLK-/+,FSDQM
MEMORY I/ F
39VF020 ( XU1 ) OCMADDR[0..19],OCMDATA[0..7]
AUDIO
TPA3002D2 ( U9 )
MUTE
RESET /RESET
MAX809_1 (U8)
MSTR SCL/SDA I2C
24LC32SN (U7)
AUDIO IN ( L/R ) SPEAK
( CN6 )
SPKR0+/-
SPKL0+/-
PWM1
VOLUME
POWER SWITCH
AIC 1563 (U2)
(U3) +2.5V
(U4) +3.3V
(U6) +1.8V +12V FROM
POWER BOARD
GM1601 (U5)
TXA0+/- , TXA1+/- , TXA2+/- ,TXA3+/- , TXAC+/-
TXB0+/- ,TXB1+/- , TXB2+/- , TXB3+/- , TXBC+/-
TO PANEL
(CN2)
KEY CONTROL
(CN4)
LBADC_RETURN / IN1 / IN2 / IN3
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PCB CONDUCTOR VIEW
Main Board
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Button Board
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Chapter 2
OPERATING INSTRUCTIONS
Front Panel Definition
This Section defines the front panel User Interface for Led Indictor and Key function.
Key Definition:
There are five keys defined in this system and described bellows.
* Adjusting display settings
External Controls
1.
POWER
Power on/off
Blue and Green : power on
Blue : Power off
Orange: in sleep mode
2 AUTO
If OSD is active, press to exit a selection in OSD. If OSD is
inactive, press and the monitor will automatically optimize
the position, focus and clock of your display.
3
OSD Function
Press to view OSD.
Press again to enter a selection in OSD.
4 < MINUS
If OSD is active, press to select or adjust OSD options. If
OSD is inactive, press once, then press the buttons marked
< or > to adjust the volume.
5 > PLUS
If OSD is active, press to select or adjust OSD options. If
OSD is inactive, press once, then press the buttons marked
< or > to adjust the volume.
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OSD Menu
Contrast:
This adjusts dark and light shades of color relative to each other to
achieve a comfortable contrast.
Brightness:
This adjusts the brightness of the picture on the screen.
Focus:
This removes any horizontal distortion and makes the picture clear
and sharp.
Clock:
If there are any vertical stripes seen on the background of the screen
this renders them less noticeable by minimizing their size. It also
changes the size of the horizontal screen.
H-Position:
This adjusts the horizontal.
V-Position:
This adjusts the vertical.
COLOR:
There are three ways of adjusting color:
Warm (Reddish white)
Cool (Bluish white)
User defined:
You can adjust the colors red, green and blue to the intensity you
desire.
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LANGUAGE:
Select the OSD menu language from
English-English, Deutsch -German,
Espanol-Spanish, 简体中文-Simplified Chinese, 繁體中文
-Traditional Chinese, Francais -French, Italiano -Italian,
and 日本語-Japanese.
OSD SETTING:
H-Position
V-Position
OSD Timer
This changes the position of the OSD window on the screen and
staying time.
INPUT SIGNAL SELECTION :
Detect input signal “Analog” or “Digital .
When simultaneous input signal then it will be select
Analog or else you can to select Digital signal.
INFORMATION:
This shows brief information on the screen.
Reset:
Recall to default settings.
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Exit:
Exit from OSD.
LED Definition
The system equips one dual color (green/amber) led to indict system status and defined as
bellows :
Factory Mode Setting
Hot Key: Auto button + Power Button
Indicator : The LED of Power is Amber
These pages are only visible in factory mode for service people using
System in power-off modeDark
System in power-saving mode
Amber
System in normal operation modeGreen + Blue
System StatusLED Color
R, G, B OFFSET:
Adjust current RGB cut off
level
R, G, B GAIN:
Adjust current RGB Driver
value.
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AUTO BURN:
Use the chip set internal pattern for
hot running monitor panel and
inverter.
AUTO COLOR:
Perform Auto Balance
measurement by chip set internal
signal. And reference these values
to initial all other color temperature
detail parameters.
COLOR UPDATE:
Force presently R, G, B offset and
gain parameters update to currently
temperature memory address.
FACTORY RESET:
Recall to factory setting and power
off immediately.
VERSION:
Display F/W version
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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. The communication channel is defined in two levels, DDC2B.
The DDC2Bis a bidirectional data channel based on the I2C protocol. The host can request EDID information over
the DDC2B channel.
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.
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
(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 signal this monitor, following a time-out period, will
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. The display is restored by pressing a key
on the keyboard, or clicking the mouse.
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