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Acer V203H
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Service Guide
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Service Guide Version and Revision
Version Release Date Revision History TPV model
TARSNDD8WDAYAN
A00 Sep.-22-2008 Initial Release
TARSNDD8WDAYNN
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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 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.
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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:
Screen messages Denotes actual messages that appear on screen.
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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.
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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
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DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list
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provided by your regional Acer office to order FRU parts for repair and service of customer machines.
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
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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.
2. Increase the separation between the equipment and receiver.
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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:
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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.
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
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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,
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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
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
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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
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 ............................................. 13
Monitor Block Diagram ............................................. 14
Main Board Diagram ............................................. 15
Software Flow chart ............................................. 16
Main Board Layout ............................................. 18
Installation ............................................. 19
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Attaching/Removing the base ............................................. 20
Chapter 2 Operating Instructions ............................................. 21
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External Controls ............................................. 21
Front Panel Controls ............................................. 21
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eColor Management (OSD) ............................................. 22
How to Adjust a Setting ............................................. 23
How To Optimize The DOS-Mode ............................................. 26
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Chapter 3 Machine Disassembly ............................................. 27
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Chapter 4 Troubleshooting ............................................. 31
Chapter 5 Connector Information ............................................. 37
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Chapter 6 FRU (Field Replacement Unit) List ............................................. 38
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Exploded Diagram ............................................. 38
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Chapter 7 Schematic Diagram ............................................. 42
6
Monitor Features Chapter 1
Introduction
Scope
This specification defines the requirements for the 20.0" 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.
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 V203H
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Panel wj LTM200KT01 SEC KR
Signal Interface D-Sub 15pin
Sync Type Separate / Compatible
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Color Temp User Adjust Support
DDC DDC2B
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V203H+AUDIO: Yes
Speaker
V203H : No
V203H+AUDIO: Yes
Headphone Jack
V203H : No
Microphone Jack No
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USB Hub Not support
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Tilt / Swivel No / No
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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 (< 1 cd/m2)
Viewing distance 40 cm for LCD performance, 20 cm for LCD failures
Warm up time 30 minutes
Analog Input signal 700 mVss
Control temperature 6500° K
User brightness control The value under user mode
Set to factory preset value, which allows that the brightest two of
User contrast control 32 linear distributed gray-scales (0 700mv) can be
distinguished.
Picture position and size Factory preset value
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Viewing angle 90° H and V
AC Supply voltage 220V± 5, 50±3Hz
Ambient temperature 20+5
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Humidity 50% ± 10%
Display mode 1600 x 900, 60 Hz, all white
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e-color mode Set to "User" mode
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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
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cm = in x 2.54
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)
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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
Driving system TFT Color LCD
Active Display Area 442.8 (W) × 249.075(H)
Pixel pitch 0.2768(H) x 0.2768(W)
LCD Panel
Contrast Ratio 1000 : 1
Response time 5ms
Luminance of White 300(Typ.) cd/
Separate Sync. H/V TTL
Input H-Frequency 30kHz 83kHz
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V-Frequency 56-75Hz
Viewing angle (H)90 (V) 90(Type)
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Display Colors 16.7M
Display mode 1600 x 900 @60Hz
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ON Mode < 48W
EPA ENERGY STAR®
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OFF Mode < 1W
Set to factory preset value, which allows that the brightest two of 32 linear distributed
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Contrast control
gray-scales (0 700mv) can be distinguished.
Power Source 100 V ~ 240 V50 ± 3Hz, 60 ± 3Hz
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Operating Temp: 0° to 40°C
Environmental Storage Temp: -30° to 65°C
Considerations Operating Humidity: 0% to 90%
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Storage Humidity: 0% to 90%
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Peak surge current < 55A peak at 240 VAC and cold starting
No advance effects (no loss of information or defect) with a maximum of 1 half-wave
Power line surge
missing per second
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LCD Panel Specification
General Specifications
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Block Diagram
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TFT LCD Module
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Back light Unit
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Electrical Characteristics
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Optical Specifications
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Support Timing
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Monitor Block Diagram
The LCD MONITOR will contain a main board, a power board, an audio board and a key 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.
V203H+AUDIO
Flat Panel and
CCFL Drive. CCFL backlight
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Inverter Board Main Board
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(include adapter)
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AC-IN
Key board
100V-240V wj Audio board D-SUB Signal
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The LCD MONITOR will contain a main board, a power board and a key board which house the flat panel control
logic, brightness control logic and DDC.
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The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage
V203H
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Flat Panel and
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CCFL Drive. CCFL backlight
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Inverter Board Main Board
(include adapter)
AC-IN
Key board
100V-240V D-SUB Signal
14
Main Board Diagram
Panel Interface
(CN301)
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Scalar IC NT68667FG
Keypad Interface
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(Include MCU, ADC, OSD) EEPROM
(CN402)
(U401) M24C16
(U403)
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H sync
D-Data
V sync
D-Clock
RGB
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D-Sub DVI
Flash Memory Crystal Connector Connector
PM25LV010A-100SCE 12MHz (CN101) (CN102)
(U402) (X401)
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Software Flow Chart
1
Y
2 3
N
N
4
N
5
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Y
6
N
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Y
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Y 9
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N
10 11
Y
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N N
12 13
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Y Y
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N
14 15 16
Y
17
N
18 19
Y
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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.
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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?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the
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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?
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Main Board Layout
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Symbol Description Symbol Description
U401 IC NT68667FG QFP-128L CN603 WAFER EH-4
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IC AP1117D33L-13 TO252-3L
U703 CN701 WAFER 9P RIGHT ANELE PITCH
DIODES
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U103 IC AZC099-04S SOT23-6L CN301 CONNECTOR
U104 IC AZC099-04S SOT23-6L X401 CRYSTAL 12MHZ HC-49US ARG6-120
U402 IC PM25LV010A-100SCE SOIC-8 CN101 D-SUB 15PIN
U403 M24C16-WMN6TP
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Installation
To install the monitor on your host system, please follow the steps below:
Steps
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Attaching/Removing the Base
Attaching:
Align the release button on the bottom of the monitor with the corresponding slots on the bottom of the base.
Removing:
Press the release button as indicated, then pull in the direction of the arrow to remove the base.
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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.
· 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
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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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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 DDC2B is a bi-directional 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.
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This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA)
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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 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
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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.
Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of
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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.
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Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.
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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 as the following indicator.
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2. Remove the screws as following indicate to release base stand.
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3. Remove the back cover and bezel.
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4. Remove the lamp connectors and remove the screws to remove the panel. Put attention to the LVDS cable.
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5. Remove the screws to remove the main board and power board.
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FOR THE V203H+AUDIO MODLE
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6. The panel
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Chapter 4
Troubleshooting
This chapter provides troubleshooting information for the V203H:
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
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OK NG Reinsert or check the
power section
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Measure U703 Pin2=3.3V,
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NG
OK Check U703, C706 and C707
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Check if X401 oscillate
waveforms are normal
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NG
Replace X401 OK
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Replace U401
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2. No Picture (LED is orange)
No picture
The button if under NG NG
X401 oscillate
control waveform is normal Replace X401
OK
OK
Check reset circuit of NG Check Correspondent
U401 is normal component
Measure U703 Pin2=3.3V,
OK
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Replace U401
OK
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X401 oscillate NG
waveform is normal
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Check U703, C706 and C707
NG
Replace X401
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OK
Check HS/VS from
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CN101 is normal
NG
Check Correspondent
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OK component
Replace U401
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3. Panel Power Circuit
White screen
NG
Measure Q302 base X401 oscillate
is low level? waveform is normal
OK NG Replace X401
OK
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Check CN301is solder
and Q302,Q301 is OK? Check reset circuit of
U401 is normal
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NG Check Correspondent
NG
Check Correspondent component.
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component. OK
OK
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Replace U401
Replace PANEL
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4. Key Board
OSD is unstable or not working
NG
Is Key Pad Board connecting normally? Connect Key Board
Y
NG
Replace Button Switch
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Is Button Switch normally?
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Y
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NG
Is Key Pad Board normally?
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Y
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Check Main Board
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5. Power Board
1) No power
Check CN902 pin4, 5 = 14V
NG
Check AC line volt 110V or 220V
OK NG
Check AC input
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Check the voltage of C905(+)
NG
Check bridge rectified circuit and F901 circut
OK
Check start voltage for the pin8 of IC901
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NG
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OK Check R904, R932, R933, and Change IC901
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Check the auxiliary voltage is bigger than
10V and smaller than 20V
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NG
OK 1) Check IC901
2) Check R909/D901 circuit
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Check IC901 pin6 PWM wave
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NG
OK Check IC901
Check Q901, IC903, D905, D906, D907, ZD921, ZD922
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2.) No Backlight
Check CN902 pin4, 5 = 14V
NG
OK Check the adapter or MB
Check ON/OFF signal
NG Check Interface board
OK
Check IC801 PIN12=12V
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NG
OK Change Q808
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Check the PWM wave from the pin9,10 of IC801 wj
OK NG
Change IC801
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Check Q802, Q803 PIN5, 6, 7, 8 have the
output of square wave at short time.
NG
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OK
Change Q802, Q803
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Check the output of T801, T802
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OK NG
Change T801, T802
Check connecter & lamp
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Connector Information Chapter 5
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FRU (Field Replaceable Unit) List Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of V203H. 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
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how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.
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Exploded Diagram (Model: V203H)
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V203H+AUDIO
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1 BEZEL L201WA-8ACER1-S1 10 COVER HINGE
2 POWER LENS 11 HINGE
3 KEY BUTTON 12 FOOT
4 MAIN FRAME S1 SCREW,42-D020523
5 SHIELD S2 SCREW
6 REAR COVER V203H S3 SCREW
7 STAND S4 SCREW 42A9940008
8 BASE 8ACER S1 S5 SCREW
9 BUTTON BASE S6 SCREW,42-D020523
V203H
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1 BEZEL L201WA-8ACER1-S1 10 COVER HINGE
2 POWER LENS 11 HINGE
3 KEY BUTTON 12 FOOT
4 MAINFRAME S1 SCREW,42-D020523
5 SHIELD S2 SCREW
6 REAR COVER V203H S3 SCREW
7 STAND S4 SCREW 42A9940008
8 BASE 8ACER S1 S5 SCREW
9 BUTTON BASE
39
Part List
Above picture show the description of the following component.
Item Picture Description
1 Main Frame
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2 Bezel
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3 Panel
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4 Power Board
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5 wj Main Board
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6 Audio BoardV203H+AUDIO
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Schematic Diagram Chapter 7
Main Board
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44
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45
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Power board
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46
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Audio board (for B203H+AUDIO)
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48
Key board
LED001
LED
2007/5/18
A2
A1
c
2007/5/11
3
2
1
GND
CN001 2007/5/18
1 LBADC1 R002 2K OHM 1% 1/10W
t
2 LBADC2 LED_GRN#
3 DC_POWERON LED_RED#
ne
4 LED_GRN#
5 LED_RED#
6
R004 2K OHM 1% 1/10W
C001 C002 C003 C004 C005 R005 1K 1/10W 1%
NC NC NC NC NC
CONN
ECOLOR
AUTO
POWER
VOL+
MENU
VOL-
el.
2007/5/18 2007/5/18 2007/5/18 2007/5/18 2007/5/18 2007/5/18
ZD006
ZD003
ZD004
ZD001
ZD002
GND 1 2 1 2 1 2 1 2 1 2 1 2
C009
C007
ZD005
C011
C010
C008
C006
SW006 SW003 SW004 SW001 SW002 SW005
SW 5 SW 5 SW 5 SW 5 SW 5 SW 5
UDZS5.6B
NC
NC
UDZS5.6B
UDZS5.6B
UDZS5.6B
UDZS5.6B
UDZS5.6B
j
3 4 3 4 3 4 3 4 3 4 3 4
NC
NC
NC
NC
.w
MENU(2K) 1.1V
LBADC1 GND
VOL- (GND) 0 V
VOL+(2K) 1.1V
ww
LBADC2