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Acer X173W
Service Guide
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1
Service Guide Version and Revision


Version Release Date Revision History TPV model

A00 Jul.-23-2007 Initial Release T77HRDDK2WAYNN




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2
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.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.




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Trademarks
Acer is a registered trademark of Acer Incorporated.
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All other trademarks are property of their respective owners.
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Conventions
The following conventions are used in this manual:
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Screen messages Denotes actual messages that appear on screen.
Note Gives bits and pieces of additional information related to the current topic.
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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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3
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 installed
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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
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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:


1. The changes or modifications not expressly approved by the party responsible for compliance could void the
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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
shock. Never spill liquids on the monitor.
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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.
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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.


Notes
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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 ................................................ 7

Introduction ............................................. 7
Electrical Requirements ............................................. 8
LCD Monitor General Specification ............................................. 9
LCD Panel Specification ............................................. 10
Support Timing ............................................. 12
Monitor Block Diagram ............................................. 13
Main Board Diagram ............................................. 14
Software Flow chart ............................................. 15
Main Board Layout ............................................. 17
Installation ............................................. 18




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Attaching/Removing the base ............................................. 19




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Chapter 2 Operating Instructions ............................................. 20

External Controls ............................................. 20




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Front Panel Controls ............................................. 21
eColor Management (OSD) ............................................. 22
How to Adjust a Setting
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LOGO ............................................. 28
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Chapter 3 Machine Disassembly ............................................. 29
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Chapter 4 Troubleshooting ............................................. 34


Chapter 5 Connector Information ............................................. 38
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Chapter 6 FRU (Field Replacement Unit) List ............................................. 39
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Exploded Diagram ............................................. 40

Chapter 7 Schematic Diagram ............................................. 43
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6
Monitor Features Chapter 1
Introduction
Scope
This specification defines the requirements for the 17" MICROPROCESSOR based Multi-mode supported high
resolution color LCD monitor. This monitor can be directly connected to general 15-pin D-sub VGA connector, 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 X173W




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Panel HSD170MGW1-B00

Signal Interface D-Sub 15-pin
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Sync Type Separate / Compatible

Color Temp User Adjust Support
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DDC DDC2B

Speaker No
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Headphone Jack No

Microphone Jack No
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USB Hub Not support

Tilt / Swivel Yes / No
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7
Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.


Ambient light : Dark room
Viewing distance : 30-50 cm for LCD performance
Warm up time
All specifications : 30 minutes
Measuring equipment : Photo detector PR650 w/2°
Measurement field
Control temperature 6500° K (e-color set to User mode)
User brightness control : Set to Factory preset value (cut off raster)
: Set to factory preset value, which allows that the brightest two of
User contrast control 32 linear distributed gray-scales (0 700mv) can be




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User red/white balance,

Green/white balance and




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Blue/white balance control : In the center (unless otherwise specified)
AC Supply voltage : 230Vą 5, 50ą3Hz
Ambient temperature : 20+5
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Display mode : 1440x900 60Hz, all white
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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
cm = in x 2.54
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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)
v' = 9y/(-2x + 12y + 3)
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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




8
LCD Monitor General Specification

Driving system TFT Color LCD

Active Display Area 367.92(H) × 229.5mm(V)

LCD Panel Pixel pitch 0.255mm(H) × 0.255mm(V)

(H) 160° and (V) 150° (CR>10)
Viewable angle
(H) 170° and (V) 170° (CR>5)

Response time 8ms

Separate Sync. H/V TTL

Input H-Frequency 30kHz ­ 80kHz

V-Frequency 55-75Hz




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Display Colors 16.2M (6-bit+FRC)

Max. Dot Clock 140MHz




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Display mode 1440 × 900 @60Hz

ON Mode < 36W
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EPA ENERGY STARŽ
OFF Mode < 1W
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Input Connector D-Sub 15pin

Input Video Signal Analog:0.7 Vpp (standard),
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Power Source 90~240VAC,47~63Hz

Operating Temp: 0° to 40°C
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Environmental Storage Temp: -30° to 65°C
Considerations Operating Humidity: 0% to 90%
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Storage Humidity: 0% to 90%

Dimension 411 (W)×334(H)×164(D) mm
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Leakage current < 3.5mA

Peak surge current < 55A peak at 240 VAC and cold starting




9
LCD Panel Specification

General Specifications




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Mechanical Information
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Optical Specifications




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11
Support Timing




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Monitor Block Diagram
The LCD MONITOR will contain a main board, a power board, and keypad board which house the flat panel control
logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.




CCFL Drive. Flat Panel and
CCFL backlight




Power Board Main Board
(include inverter board)




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Keyboard Input :




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D-SUB Signal
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AC-IN
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90V-240V
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Main Board Diagram




Crystal LCD Interface
(X401) (CN601)




MCU Scalar IC RTD2025L
RTD 2120L (Include ADC, OSD)
(U401) (U501)




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H sync
Key Board V sync




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Control RGB
CN202
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D-Sub
Connector
(CN301)
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14
Software Flow Chart


1



Y
2 3
N
N

4



N
5




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Y


6



N
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Y 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




15
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?




16
Main Board Layout




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Symbol Description Symbol Description
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U201 056G 585 4A X401 093G 22 45 H
U401 056G1125701 X CN201 033G3802 9
U402 056G 158501 CN202 033G3802 6
U501 056G 562701 CN601 033G801930F CH JS




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Installation




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Attaching/Removing the Base




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19
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. Power Switch 4. Auto Adjust botton/Exit
2. Power LED 5.
3. Empowering / Exit 6. MENU/ENTER




20
Front Panel Control




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eColor Management (OSD)




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How to Adjust a Setting




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Adjusting the picture




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OSD Message
a. Outline




b. The Description For OSD Message


Item Description

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.


Input Not When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor




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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.
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Connected This message will be flying.

Analog-Only Model: When the video cable is connected, but there is no active signal
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No Signal
input, will show this message, then enter power saving.
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27
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
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The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL listed
and CSA labeled. The voltage rating for the power cord shall be 125 volts AC.
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Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting 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.




28
Machine Disassembly Chapter 3
This chapter contains step-by-step procedures on how to disassemble the monitor for
maintenance.
Disassembly Procedure
1. Remove the cover hinge marked in red. (Fig 1)




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Fig 1
2. Remove the screws to release base stand . (Fig 2)
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Fig 2




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3. Remove the back cover and regard the hook. (Fig 3-4)




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Fig 3




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Fig 4
4. Remove the bezel. (Fig 6)
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Fig 5

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5. Remove the keyboard. (Fig 6)




Fig 6




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6. Remove the screws to remove the panel. (Fig 7-10)




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Fig 7




Fig 8




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Fig 9




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Fig 10


7. Remove the screw as following indicate to remove the main board and power board. (Fig 11-13)
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Fig 11




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Fig 13
Fig 12
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Troubleshooting Chapter 4
This chapter provides troubleshooting information for the X173W:
1. 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




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AC of 100-240 is normal


NG Reinsert or check the




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OK
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Measure U201 Pin 2=3.3V
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NG

OK Measure CN201 Pin3=5V?
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OK
Check if X401 oscillate
waveforms are normal Replace U201
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NG
Replace X401 OK
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Replace U401




if the picture is normal

NG


Replace U501




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2. No Picture




No picture




Measure U201 PIN2=3.3V



OK NG
Replace U201




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Check if X401oscillate waveforms are
normal




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NG
OK wj Replace X401



Check if the sync signal from
computer is output and video cable
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is connected normally
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NG Input the sync signal of computer, or
OK change the cable
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Replace U401, U501
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3. Panel Power Circuit




Check the PPWR panel power relative circuit Q601, Q602
Check CN601 PIN 1,2,3 should have
In normal operation, when LED =green, R601 low level,
response from 0V to 5V When we NG
If PPWR no-response when the power switch
switch the power switch from on to off
Turn on and turn off, replace the U401- RTD2120L




OK


Replace panel




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4. Keypad Board



OSD is unstable or not working
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NG
Is Keypad board connecting normally? Connect Keypad Board
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OK

NG
Is Button Switch normally? Replace Button Switch
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OK
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NG
Is Keypad board normally? Replace Keypad Board
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OK

Check main board




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5. No Backlight




Check C802 (+) =12V


NG
OK Change FB801



Check ON/OFF signal

NG
OK Check Interface board




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Check IC801 pin12=12V?




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NG
Change Q805.Q808 or Q810
OK




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Check the pin9&10 of IC801 have PWM wave
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NG
Change Q801/Q804/Q811/Q812
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OK
OK
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Replace IC801
Check the resonant wave of
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pin6 & pin1 for T801

NG
OK
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Check Q802
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Check the output of T801


NM Change T801
OK



Check connecter & lamp




37
Connector Information Chapter 5
The following figure shows the connector locations on the monitor:




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38
FRU (Field Replaceable Unit) List Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of X173W.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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39
Exploded Diagram (Model: X173W)




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40
Part List
Above picture show the description of the following component.


Item Picture Description




1 Base




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2 shield
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3 Key board
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Panel



4




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5 Power Board




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6

el. Main Board
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42
Schematic Diagram Chapter 7
Main Board
CN201


1 CMVCC
2
3 CMVCC MVCC FB202
4 CMVCC
5 BKLT-VBRI
DIM# {4}
6 BKLT-EN NC
7 C_PANEL_INDEX CMVCC
PANEL_ID# {4}
8 Volume# FB201 VCC3




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Volume# {4} U201
9 Mute
Mute {4}
3 2
VIN VOUT




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120




VSS
CONN
C202 + C204 AP1117E33LA C205 + C203




1
0.1uF/16V 0.1uF/16V
Panel ID(3.3V PWM) '07-01-10 change to Elite '07-01-10 change to Elite




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Back light
Dimming(3.3V PWM)
VCC3




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R202
* BKLT-EN High ON(3.3V) 4K7 1/16W




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BKLT-EN R201
200 1/16W


C206
Q202
INV_ON# {4}
0.1uF/16V PMBS3904




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VCC3




R207 R208 '06-12-29-3 Change R207,R208 Value
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120R 1/16W 120R 1/16W
from 470ohm to 120ohm
'06-11-3 Remove R209(470 ohm)
CN202 Q204
PMBS3906
1 KEY 0 R210 10K 1/16W
KEY 0 {4} LED_R# {4}
2 KEY 1
KEY 1 {4}
3 POWER_KEY #
POWER_KEY # {4}
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4 LED_G
5 LED_R LED_R
6 R213 10K 1/16W
LED_G# {4}
'06-12-29-3 Remove R211,R212(470ohm)
Q205
2




2




2




LED_G PMBS3906
CONN ZD202 C209 ZD203 C201 ZD201 C210
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0.1uF/16V
NC 0.1uF/16V NC 0.1uF/16V NC
1




1




1




Near to Connect
T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL X173 Size B

TPV MODEL T77SRDDNHABN Rev 1
G2498-1-K-AC-1-070707
Key Component 02.POWER PCB NAME 715G2498-1-K-AC

Date Monday , July 09, 2007 Sheet 2 of 6




43
DSUB_V {4}
R302 0R05 1/16W R301 100R 1/16W
RTD_H {5}
R303 100R 1/16W
RTD_V {5}




2


2
R304 R305 C302 C303
ZD302 ZD303 2K2 1/16W FB302
UDZS5.6B UDZS5.6B 2K2 1/16W 22pF 22pF R306 100R 1/16W C304
VGA_B+ 1 2 RTD_B+
12/29 change RTD_B+ {5}
BEAD
1


1
ZD302 ZD303 CN301
R311 100R 1/16W R307 C305 0.047uF




16
from NC to
DSUB_CONNECT {4} 5pF/50V
insert
10 75R 1/16W
DDC1_SCL 15 5 VGA_CON DSUB_5V R308 100R 1/16W C306
{4} DDC1_SCL




2
9 DSUB_5V VGA_B- RTD_B-
RTD_B- {5}
DSUB_V 14 4 ZD305




2
8 VGA_B-




t
DSUB_H 13 3 VGA_B+ ZD304 UDZS5.6B 0.047uF
7 VGA_G-
DDC1_SDA 12 2 VGA_G+ UDZS5.6B FB301