Acer AL1917 User manual

Acer AL1917
Service Guide

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Service Guide Version and Revision
No. Version Release Date Revision TPV Model Name
1 1.0 Apr.-20-06 Initial release T986KA5HKGAEAP

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Copyright
Copyright2006Acer Incorporated.
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 Acer Incorporated.
ACER AL1917 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.
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, 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.
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
zDo not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in
a wet basement.
zDo 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.
zSlots 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.
zThe 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.
zThe 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.
zUnplug 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.
zDo not overload power strips and extension cords. Overloading can result in fire or electric shock.
zNever 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.
zDo 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
zTo ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
configured receptacles marked between 100 - 240V AC, Min. 5A.
zThe wall socket shall be installed near the equipment and shall be easily accessible.
Special Notes On LCD Monitors
The following symptoms are normal with LCD monitor and do not indicate a problem.
Notes
zDue 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.
zYou may find slightly uneven brightness on the screen depending on the desktop pattern you use.
zThe 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.
zDue 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
Induction ……………………………………… 6
Electrical Requirements ……………………………………… 7
LCD Monitor General Specification ……………………………………… 8
LCD Panel Specification ……………………………………… 9
Support Timing ……………………………………… 11
Block Diagram ……………………………………… 12
Main Board Diagram ……………………………………… 13
Software Flow chart ……………………………………… 14
Main Board Layout ……………………………………… 16
Front Bezel ……………………………………… 17
Installation Instructions ……………………………………… 18
Chapter 2 Operating Instructions ……………………………………… 19
External Controls ……………………………………… 19
Adjusting the picture ……………………………………… 20
Hot-Key Menu ……………………………………… 23
OSD Message ……………………………………… 23
LOGO ……………………………………… 24
Chapter 3 Machine Disassembly ……………………………………… 25
Chapter 4 Troubleshooting ……………………………………… 33
Chapter 5 Connector Information ……………………………………… 38
Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 39
Exploded Diagram ……………………………………… 40
Chapter 7 Schematic Diagram ……………………………………… 42
Main board ……………………………………… 42
Power board ……………………………………… 48
Key board ……………………………………… 50

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Monitor Features
Introduction
Scope
This specification defines the requirements for the 19” MICROPROCESSOR based Multi-mode supported high
resolution color LCD monitor. This monitor can be directly connected to general 15 pin D-sub VGA 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.
Before you operate the monitor
Features
48 cm (19”) TFT Color LCD Monitor
Crisp, Clear Display for Windows
Recommended Resolutions: 1280 X 1024 @60Hz
EPA ENERGY STAR®
Ergonomic Design (TCO” 03 Approved)
Space Saving, Compact Case Design
Checking the contents of the package
The product package should include the following items:
1. LCD Monitor
2. Owner's Manual
3. Power Cord
4. 15-pin D-Sub Cable
5. Audio Cable
6. Quick Start Guide
7. Audio Cable
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Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
- Warm up time ＞30 min.
- AC supply voltage 230V±5％, 50±3 Hz
- Ambient temperature 20°C ±5°C
- Humidity 65% ±20%
- Display mode 1280x1024, 60 Hz, all white
- Contrast control
Set to factory preset value, which allows that the brightest two
of 32 linear distributed gray-scales (0 ～700mv) can be
distinguished.
- Color temperature 7800°K
- Brightness control Set to Factory preset value (cut off raster)
- Analog Input signal 700 mVss
- Picture position and size Factory preset value
-Viewing angle 90 ° H and V
-Viewing distance 40 cm for LCD performance, 20 cm for LCD failures
-Ambient illumination Dark room (< 1 cd/m2)

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LCD Monitor General Specification
Items Description
Driving system TFT Color LCD
Panel M190EN04 V5
Size 48 cm(19")
Pixel pitch 0.294 mm( H ) ×0.294 mm( V )
Brightness 270 cd /m2 (Typical)
Contrast 550:1 (Typical)
Viewable angle 140°(H) 135°(V)
LCD Panel
Response time 8 ms
Video R, G, B Analog Interface
H-Frequency 30 kHz – 80 kHz
Input
V-Frequency 55-75 Hz
Display Colors 16.2M Colors
Dot Clock 135 MHz
Max. Resolution 1280 ×1024 @75 Hz
Plug & Play VESA DDC2BTM
ON Mode ≤37W
EPA ENERGY STAR®
OFF Mode ≤1W
Input Connector D-Sub 15pin
Input Video Signal Analog : 0.7 Vp-p (standard), 75 OHM, Positive
Horizontal : 376.32 mm
Maximum Screen Size
Vertical : 301.056 mm
Power Source 100~264VAC,47~63 Hz
Operating Temp: 5°to 50°C
Storage Temp.: -20°to 65°C
Environmental Considerations
Operating Humidity: 10% to 85%
Dimensions 416(W)×429.4(H)×182(D)mm
Weight (N. W.) 4.8 kg

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LCD Panel Specification
LCDPanelModel
Items Unit Specifications
Screen Diagonal [mm] 480 (19.0”)
Active Area [mm] 376.32 (H) x 301.06 (V)
Pixels H x V 1280(x3) x 1024
Pixel Pitch [mm] 0.294 (per one triad) x 0.294
Pixel Arrangement R.G.B. Vertical Stripe
White Luminance ( Center ) [cd/m2] 270 (center, Typ) @ 7mA
Contrast Ratio 550 : 1 (Typ)
Optical Response Time [ msec ] 8 ms(Typ, on/off)
Color Saturation 72% NTSC
Nominal Input Voltage VDD [Volt] +5.0 V
Weight [Grams] 2700 (Max)
Physical Size [mm] 396 (H) x 324 (V) x 18 (D) (Typ)
Support Color 16.2M colors (RGB 6-bit data+FRC data)
Temperature Range
Operating
Storage (Shipping)
[0C]
[0C]
0 to + 50
- 20 to + 60
TCO’03 compliance TCO’03 compliance
Surface Treatment Hard-coating (3H), Non-Glare treatment
RoHS RoHS Compliance

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OpticalSpecifications
Measuring Condition: Ta = 25°C.

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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.
85Hz refresh rate Support
Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should display “ Out of Range”
warning menu at this mode.

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Monitor Block Diagram
The LCD MONITOR will contain a main board, a power board, 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.
Video signal, DDC
Power Board
(Inverter, adapter 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

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Main Board Diagram
Panel Interface
(CN101)
TSUM16AK
(Include ADC, OSD)
(U401)
Flash Rom
(U402)
OSD Control
Interface
(Key pad)
D-Sub
Connector
(CN405)
EEPROM
(U403)
EEPROM
(U404)
R
G
B
Hsync
Vsync
RXD
TXD
DB15_SDA
DB15_SCL
EPR_SDA
EPR-SCL

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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
N
16
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
Label Part Number Description
U201 090G6093 1 HEAT SINK
U401 056G 562100 TSUM16AK
U702 056G 563 21 AP1084K33LA
U406 056G 643 5A MAX810 STRG
U404 056G1133 34 M24C02-WMN6TP
U403 056G1133 56 M24C16-WMN6TP
CN901 087G 501 32 S AC SOCKET
CN902 095G8014 12 42 HARNESS
CN102 033G8032 4C WAFER
CN101 033G803412D WAFER

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Front Bezel
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.
External Controls Front Panel Control
Item Description Item Description
1. Auto Adjust / Exit 4. MENU/ENTER
2. < 5. Power Button
3. > 6. Power Indicator

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InstallationInstructions
Swivel Base
Adjusting The Viewing Angle
· For optimal viewing it is recommended to look at the full face of the monitor, then adjust the monitor’s angle to your
own preference.
· Hold the stand so you do not topple the monitor when you change the monitor’s angle.
· You are able to adjust the monitor’s angle from -5° to 15°.

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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.
Front Panel Control
•/Power Button:
Press this button to turn the monitor ON or OFF. And display the monitor’s state.
•Power Indicator:
Green – Power on mode.
Orange – Off mode.
•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 navigate 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 navigate through adjustment icons when OSD is ON or
adjust 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.
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
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