Acer AL1722 User manual

Acer AL1722
Service Guide
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Service Guide Version and Revision
No. Version Release Date Revision
1 1.0 Jan.12, 2005 Original release
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Copyright
Copyright 2005 LiteOn Technology Corp.
All rights reserved.
This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or
converted to any electronic machine readable form without prior written permission of LiteOn
Technology Corp.
ACER AL1722 Service Manual.
Printed in Taiwan.
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.
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.
Trademarks
LiteOn is a registered trademark of LiteOn Technology Corp.
All other trademarks are property of their respective owners.
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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.
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)
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 shock 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 manufacturer or sold with the monitor. If you mount the monitor on a
wall or shelf, use 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 - 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 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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Chapter 1 Monitor Features ……………………………………… 8
Induction ……………………………………… 9
Electrical Requirements ……………………………………… 10
LCD Monitor General Specification ……………………………………… 11
LCD Panel Specification ……………………………………… 12
Support Timing ……………………………………… 13
Block Diagram ……………………………………… 15
Main Board Diagram ……………………………………… 16
Software Flow chart ……………………………………… 17
Main Board Layout ……………………………………… 18
Front Bezel ……………………………………… 22
Rear Bezel ……………………………………… 23
Chapter2 OperatingInstructions
……………………………………… 24
External Controls ……………………………………… 24
Front Panel Controls ……………………………………… 25
Adjusting the picture ……………………………………… 26
Hot-Key Menu ……………………………………… 30
OSD Message ……………………………………… 30
LOGO ……………………………………… 31
Chapter 3 Machine Disassembly
……………………………………… 32
Chapter 4 Troubleshooting
……………………………………… 39
Chapter5 ConnectorInformation
……………………………………… 45
Chapter 6 FRU (Field Replacement Unit) List
……………………………………… 46
Exploded Diagram ……………………………………… 47
Chapter7 SchematicDiagram
……………………………………… 52
Analog and Digital Input ……………………………………… 52
TSU56AK ……………………………………… 53
LVDS ……………………………………… 54
DC Power ……………………………………… 55
MCU/Key Board Connector ……………………………………… 56
Audio ……………………………………… 57
Inverter Board ……………………………………… 58
Table Of Content
s
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Monitor Features
Introduction
Scope
This specification defines the requirements for the 17” MICRO-PROCESSOR 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.
Chart of AL1722
Panel 17" Samsung
LTM170EU-21
D-SUB
Signal Interface DVI
Sync Type Separate / Compatible
Color Temp User Adjust Support
DDC DDC2B
Speaker 1.5W + 1.5W (Rated power)
Headphone Jack No
Microphone Jack No
USB Hub Not support
Tilt / Swivel Yes / No
Chapter 1
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Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light :225 lux
Viewing distance :40 cm in front of LCD panel
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 :Maximum (unless otherwise specified)
User contrast control : Typical (unless otherwise specified)
User red/white balance,
Green/white balance and
Blue/white balance control : In the center (unless otherwise specified)
Power input :90Vac or 240Vac
Ambient temperature :20+5℃
Analog input mode :1280 x1024 @60 Hz
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 : 17 “ active matrix color TFT LCD
SAMSUNG LTM170EU-21
Display size :337.92mm (H) ×270.336mm(V)
Display mode :VGA 640 ×480 (60/75 Hz)
SVGA 800 ×600 (60/75 Hz)
XGA 1024 ×768 (60/70/75 Hz)
SXGA 1280 ×1024 (60//75 Hz)
Pixel pitch :0.264mm(H) ×0.264mm(V)
Display dot :1280 x (RGB) ×1024
Pixel clock :135.0MHz
Contrast ratio :700:1
Brightness :300 cd/m2
Response time (Tr/Tf) :8ms (Tr=1.7ms, Tf=6.3ms)
Display color :16.2M(RGB 8 bit Data)
Viewing angle :H:150 / V:135 (typ)
Pc interface :RGB Analog Interface
Digital interface
Signal connector :D-Sub 15pin
DVI-D 24pin
Interface frequency :Horizontal Frequency 30KHz ----83KHz
Vertical Frequency 55Hz ------75Hz
Plug & play :VESA DDC2B
Power Input voltage :50/60HZ, 100 VAC to 240VAC
Total output power :45 Watt max.
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LCD Panel Specification
LCD Panel Model (SAMSUNG LTM170EU-21)
 Display Type active matrix color TFT LCD
 Resolution 1280x1024 pixels
 Display Dot 1280x (RGB) x 1024
 Display Area 337.92mm(H) x 27.336mm(V)
 Pixel Pitch 0.294mm(H) x 0.294mm(V)
 Display Color 16.2M (true)
 Lamp Frequency 80kHz (Max)
 LampCurrent 7.0mArms(Max)
 Weight 1900g (Max)
 Optical Specifications
IL= 6.5mArms Ta= 25 ±2°C VDD =5V FV= 60Hz FDCLK = 54MHz
ITEM Symbol Condition MIN. TYP. MAX. UNIT
Contrast Ratio
(Center of screen) C/R -700 -
Rising Tr-1.7 -
Response
Time Falling TF-6.3 -msec
Luminance of white
(Center of screen) YL-300 -cd/m2
RX0.650
Red RY0.330
GX0.300
Green GY0.600
BX0.150
Blue BY0.080
WX0.313
Color
Chromaticity
(CIE 1931)
White WY
θ=0,
φ=0
Normal
Viewing
Angle
-
0.329
-
θL-75 -
Hori. θR-75 -
φH-75 -
Viewing
Angle Ver. φL
CR≥10
-80 -
Degrees
Brightness Uniformity
(9 Points) BUNI --25 %
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Supported Timing
Modes Resolution
Horizontal
Frequency Vertical Frequency
640x480 31.469 59.940
VGA 640x480 37.500 75.000
800x600 37.879 60.317
SVGA 800x600 46.875 75.000
1024x768 48.363 60.004
1024x768 56.476 70.069
XGA
1024x768 60.023 75.029
1280x1024 64.000 60.000
VESA
SXGA 1280x1024 80.000 75.000
IBM DOS 720x400 31.469 70.087
1024x768 48.780 60.001
MAC XGA 1024x768 60.241 74.927
ٛ.
Support Modes
There will be 12 total support modes to accommodate the above mode and other video
modes within the frequency range of the monitor.
80Hz refresh rate Support
Monitor should display 80Hz refresh rate mode as emergency mode.
Monitor should display “ Out of Range” warning menu at this mode.
Video Input Connector
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1. Red 9. +5V
2. Green 10. Logic Ground
3. Blue 11. Monitor Ground
4. Monitor Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA Connector layout
15
610
11 15
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PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1. TMDS Data 2- 13. TMDS Data 3-
2. TMDS Data 2+ 14. +5V Power
3. TMDS Data 2/4 Shied 15. Ground (for +5V)
4. TMDS Data 4- 16. Hot Plug Detect
5. TMDS Data 4+ 17. TMDS Data 0+
6. DDC Clock 18. TMDS Data 0-
7. DDC Data 19. TMDS Data 0/5 Shield
8. Analog Vertical Sync 20. TMDS Data 5-
9. TMDS Data 1- 21. TMDS Data 5-
10. TMDS Data 1+ 22. TMDS Clock Shield
11. TMDS Data 1/3 Shield 23. TMDS Clock+
12. TMDS Data 3- 24. TMDS Clock-
DVI Connector layout
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Monitor Block Diagram
The LCD MONITOR will contain a main board, an inverter board, adapter, keypad board and
audio board which house the flat panel control logic, brightness control logic and DDC.
The Inverter board will drive the backlight of panel.
The adapter will provide the 12V DC-power to inverter/power board and main board.
Video signal, DDC
Inverter board
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector For
white balance adjustment
in factory mode
HOST Computer
CCFL Drive.
AC-IN
100V-240V
Audio board
Adapter
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Main Board Diagram
LCD Interface
Scaler TSU56AK
(Include: ADC, OSD etc)
MCU
OSD Control
Interface (Keypad)
DVI
Connector
D-SUB
Connector
EEPROM
24C02
EEPROM
24C02
Crystal
14.318MHZ
EEPROM
24C16
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Software Flow Chart
1) MCU initialize.
2) Is the eeprom blank?
3) Program the eeprom by default values.
4) Get the PWM value of brightness from
eeprom. Check the pin PANEL1 and PANEL2
to tell which panel to get with it.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Saving the power key status into eeprom.
Turn on the LED and set it to green color.
Scalarinitializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog and digital port, are there
any signals coming?
13) Does the scalar send out a interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog or
digitalport?
16) Display " No Input Signal " message. And go
into standby mode after the message disappear.
17) Program the scalar to be able to show the coming
mode.
18) ProcesstheOSDdisplay.
19) Read the keyboard. Is the power key pressed?
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
N
16
17
19
Y
N
18
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Main Board Layout
Label Part Number Description
U301 56L1133 34 M24C02-WMN6T SMT
U302 56L1133 34 M24C02-WMN6T SMT
U601 56L1125137SZ6 W78E65P-40
X401 93L 22 53 CRYSTAL 14.318MHz
U401 56L 562 82 SCALER IC TSU16AK
Y601 93L 22 55 J 20MHZ
U201 56G 563 38 RT9164A18PG S0T-223
U202 56L 563 7 AIC1084-33CM
U603 56L 643 5A MAX810STR SOT-23
U602 56L1133 56 M24C16-WMN6T/W SO-8
CN301 88L 35315F HS D-USB 15PIN
CN302 88L 35424F HS DVI 24PIN
CN503 33G802724B H WAFER
CN201 33L800912L H HEADER 2*6P
CN602 33L8027 14 H WAFER 14P 2.0MM
U701 56L 616 1 TDA7496L BY ST
CN701 88L 30210K E PHONE JACK
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The step between front bezel and back cover shall be within specification.
Top and Bottom Left and Right
Back cover & Bezel concavity Back cover & Bezel concavity
0.8mm ≤A ≤1.3mm 0.8mm ≤A ≤1.3 mm
Back Cover & Hinge Cover concavity
0mm ≤B ≤0.5mm
B
Base & Neck concavity
0mm ≤C ≤0.6mm
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Top and Bottom Left and Right
Backcover&Bezelstep Backcover&Bezelstep
0mm ≤D ≤0.8mm 0mm≤D ≤0.8 mm
LCD Horizontally
The angle between front bezel and LCD unit in bottom side should not large than 1.0mm.
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