Acer | B203H | Technical information | Acer B203H Technical information

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Acer B203H
Service Guide
1
Service Guide Version and Revision
Version
Release Date
Revision History
A00
Sep.-22-2008
Initial Release
TPV model
TARSNDD8WDAYDN
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TARSNDD8WDAYHN
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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
Pentium and Pentium II/III are trademarks of Intel Corporation.
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Intel is a registered trademark of Intel Corporation.
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incidental or consequential damages resulting from any defect in the software.
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Other brand and product names are trademarks and/or registered trademarks of their respective holders.
Trademarks
Acer is a registered trademark of Acer Incorporated.
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All other trademarks are property of their respective owners.
Conventions
The following conventions are used in this manual:
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.
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Important
Gives precautionary measures to avoid possible hardware or software problems.
Remind you to do specific actions relevant to the accomplishment of procedures.
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Caution
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Screen messages
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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
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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
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
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
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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.
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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.
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Notice:
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4. Consult the dealer or an experienced radio/TV technician for help.
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
z Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in
a wet basement.
z 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.
z 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.
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z 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.
z 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
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safety purpose of the grounded plug.
z 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.
z Do not overload power strips and extension cords. Overloading can result in fire or electric shock.
z Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric
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shock. Never spill liquids on the monitor.
z 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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z To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
configured receptacles marked between 100 - 240V AC, Min. 5A.
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z The wall socket shall be installed near the equipment and shall be easily accessible.
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Special Notes On LCD Monitors
The following symptoms are normal with LCD monitor and do not indicate a problem.
Notes
z 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.
z You may find slightly uneven brightness on the screen depending on the desktop pattern you use.
z 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.
z 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
…………………………………………
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
Screen Position Adjustment
………………………………………
20
Operating Instructions
………………………………………
22
External Controls
………………………………………
22
Front Panel Controls
………………………………………
22
………………………………………
23
………………………………………
24
How To Optimize The DOS-Mode
………………………………………
27
Chapter 3
Machine Disassembly
………………………………………
28
Chapter 4
Troubleshooting
………………………………………
31
Chapter 5
Connector Information
………………………………………
37
Chapter 6
FRU (Field Replacement Unit) List
………………………………………
38
Exploded Diagram
………………………………………
38
Schematic Diagram
………………………………………
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eColor Management (OSD)
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How to Adjust a Setting
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Chapter 2
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Chapter 1
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Monitor Features
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Table Of Contents
Chapter 7
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Chapter 1
Monitor Features
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
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Chart of B203H
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target is 50k hours or more.
LTM200KT01 SEC KR
Signal Interface
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Panel
D-Sub 15pin;DVI 24pin
Sync Type
Separate / Compatible
Color Temp User Adjust
DDC2B
Speaker
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DDC
Support
Headphone Jack
B203H+AUDIO:
B203H
:
B203H+AUDIO:
B203H
:
No
USB Hub
Not support
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Microphone Jack
Yes/Yes
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Tilt / Swivel
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Yes
No
Yes
No
Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Picture position and size
Viewing angle
AC Supply voltage
Ambient temperature
Dark room (< 1 cd/m2)
40 cm for LCD performance, 20 cm for LCD failures
>30 minutes
700 mVss
6500° K
The value under user mode
Set to factory preset value, which allows that the brightest two of
32 linear distributed gray-scales (0~ 700mv) can be
distinguished.
Factory preset value
90° H and V
220V± 5%, 50±3Hz
20+5℃
Humidity
Display mode
e-color mode
50% ± 10%
1600 x 900, 60 Hz, all white
Set to “User” mode
Ambient light
Viewing distance
Warm up time
Analog Input signal
Control temperature
User brightness control
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User contrast control
Measurement systems
The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
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1 tesla = 10,000 gauss
cm = in x 2.54
Lb = kg x 2.2
Degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
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v' = 9y/(-2x + 12y + 3)
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Degrees F = [°C x 1.8] + 32
x = (27u'/4)/[(9u'/2) - 12v' + 9]
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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
442.8 (W) × 249.075(H)
Pixel pitch
0.2768(H) x 0.2768(W)
Contrast Ratio
1000 : 1
Response time
5ms
Luminance of White
300(Typ.) cd/㎡
Separate Sync.
H/V TTL
H-Frequency
30kHz – 83kHz
V-Frequency
56-75Hz
(H)90 (V) 90(Type)
Display Colors
16.7M
Display mode
1600 x 900 @60Hz
ON Mode
EPA ENERGY STAR®
OFF Mode
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Viewing angle
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Active Display Area
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Input
TFT Color LCD
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LCD Panel
Driving system
< 48W
< 1W
Set to factory preset value, which allows that the brightest two of 32 linear distributed
gray-scales (0~ 700mv) can be distinguished.
Power Source
100 V ~ 240 V,50 ± 3Hz, 60 ± 3Hz
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Operating Temp: 0° to 40°C
Storage Temp: -30° to 65°C
Operating Humidity: 0% to 90%
Storage Humidity: 0% to 90%
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Environmental
Considerations
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Contrast control
Peak surge current
< 55A peak at 240 VAC and cold starting
Power line surge
No advance effects (no loss of information or defect) with a maximum of 1 half-wave
missing per second
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LCD Panel Specification
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General Specifications
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.
B203H+AUDIO:
Flat Panel and
CCFL backlight
Main Board
AC-IN
100V-240V
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Inverter Board
(include adapter)
DVI Signal
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CCFL Drive.
Key board
D-SUB Signal
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Audio board
The LCD MONITOR will contain a main board, a power board and a key board which house the flat panel control
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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.
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B203H:
Flat Panel and
CCFL backlight
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CCFL Drive.
Main Board
Inverter Board
(include adapter)
AC-IN
100V-240V
Key board
DVI Signal
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D-SUB Signal
Main Board Diagram
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Panel Interface
(CN301)
Scalar IC NT68667FG
(Include MCU, ADC, OSD)
(U401)
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D-Sub
Connector
(CN101)
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Crystal
12MHz
(X401)
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Flash Memory
PM25LV010A-100SCE
(U402)
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H sync
V sync
RGB
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Keypad Interface
(CN402)
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EEPROM
M24C16
(U403)
D-Data
D-Clock
DVI
Connector
(CN102)
Software Flow Chart
1
Y
2
3
N
N
4
N
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5
Y
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N
7
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Y
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Y 9
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N
N
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Y
12
Y
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N
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Y
N
14
15
Y
17
18
N
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?
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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.
9) Save the power key status into EEPROM.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
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Turn on the LED and set it to green color.
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12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
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14) Wake up the scalar.
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
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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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Description
Symbol
Description
IC NT68667FG QFP-128L
CN603
WAFER EH-4
U703
IC AP1117D33L-13 TO252-3L DIODES
CN701
WAFER 9P RIGHT ANELE PITCH
U103
IC AZC099-04S SOT23-6L
CN301
CONNECTOR
U104
IC AZC099-04S SOT23-6L
X401
U402
IC PM25LV010A-100SCE SOIC-8
CN101
D-SUB 15PIN
U403
M24C16-WMN6TP
CN102
DVI 24PIN CONN F
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U401
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Symbol
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Main Board Layout
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CRYSTAL 12MHz HC-49US ARG6-120
Installation
To install the monitor on your host system, please follow the steps below:
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Steps
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Screen Position Adjustment
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Chapter 2
Operating Instructions
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.
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External Controls
Front panel controls
1. Power Switch:
To turn ON or OFF the power.
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2. Power LED:
Lights up to indicate the power is turned ON.
3. Empowering / Exit:
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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 to select scenario mode.
4. Auto Adjust button / Exit:
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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
5. < / >
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Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
1) Press < or > to select the desired function. Press < or > to change the settings of the current function.
2) Press < or > to adjust the volume up or down (Only for Audio).
6. MENU / ENTER:
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON.
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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
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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
(NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no
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video-input signal present. When there is no video input signals this monitor, following a time-out period, will
automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video
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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
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
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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.
27
Chapter 3
Machine Disassembly
This chapter contains step-by-step procedures on how to disassemble the monitor for
maintenance.
Disassembly Procedure
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Remove the back cover and bezel.
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2.
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1. Remove the hinge assembly.
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3. Remove the lamp connectors and remove the screws to remove the panel. Put attention to the LVDS cable.
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4. Remove the screws to remove the main board and power board.
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FOR THE V203H+AUDIO MODLE
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5. The panel
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Chapter 4
Troubleshooting
This chapter provides troubleshooting information for the B203H:
1. No Power
No power
Press power key and look if the
picture is normal
NG
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Reinsert or check the
power section
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OK
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Please reinsert and make sure the
AC of 100-240 is normal
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NG
Measure U703 Pin2=3.3V,
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NG
OK
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Check if X401 oscillate waveforms are
normal
NG
OK
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Replace X401
Replace U401
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Check U703, C706 and C707
2. No Picture (LED is orange)
No picture
NG
The button if under
control
X401 oscillate
waveform is normal
NG
Replace X401
OK
OK
Check reset circuit of
U401 is normal
NG
Check Correspondent
component
Measure U703 Pin2=3.3V,
Replace U401
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OK
NG
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X401 oscillate
waveform is normal
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OK
Check U703, C706 and C707
NG
Replace X401
Check HS/VS from
CN101 is normal
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OK
OK
Check Correspondent
component
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NG
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Replace U401
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3. Panel Power Circuit
White screen
NG
Measure Q302 base
is low level?
X401 oscillate
waveform is normal
OK
NG
Replace X401
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OK
Check CN301is solder
and Q302,Q301 is OK?
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NG
NG
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Check Correspondent
component.
Check reset circuit of
U401 is normal
OK
OK
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Replace PANEL
Replace U401
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Check Correspondent
component.
4. Key Board
OSD is unstable or not working
NG
Connect Key Board
Is Key Pad Board connecting normally?
Y
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Y
NG
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Check Main Board
Replace Key Board
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Is Key Pad Board normally?
Y
Replace Button Switch
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NG
Is Button Switch normally?
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5. Power Board
1) No power
Check CN902 pin4, 5 = 14V
NG
Check AC line volt 110V or 220V
NG
Check AC input
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OK
Check the voltage of C905(+)
NG
Check bridge rectified circuit and F901 circut
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OK
NG
Check R904, R932, R933, and Change IC901
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OK
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Check start voltage for the pin8 of IC901
NG
1) Check IC901
2) Check R909/D901 circuit
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OK
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Check the auxiliary voltage is bigger than
10V and smaller than 20V
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Check IC901 pin6 PWM wave
NG
Check IC901
OK
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
OK
Check Interface board
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Check IC801 PIN12=12V
NG
OK
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Change Q808
NG
OK
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Check the PWM wave from the pin9,10 of IC801
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Change IC801
Check Q802, Q803 PIN5, 6, 7, 8 have the
output of square wave at short time.
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NG
Change Q802, Q803
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OK
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Check the output of T801, T802
OK
NG
Change T801, T802
Check connecter & lamp
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Chapter 5
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Connector Information
37
Chapter 6
FRU (Field Replaceable Unit) List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of B203H. 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.
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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: B203H)
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B203H+AUDIO:
38
1
BEZEL L201WA-8ACER1-P1
11
HINGE ASSEMBLY
2
3
POWER LENS
KEY BUTTON
S1
S2
SCREW,42-D020523
SCREW
4
5
MAINFRAME
SHIELD
S3
S4
SCREW
SCREW,42-D020523
S5
SCREW
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6
REAR COVER B203H DVI
10
COVER HINGE
B203H:
1
BEZEL L201WA-8ACER1-P1
10
COVER HINGE
2
POWER LENS
11
HINGE ASSEMBLY
3
KEY BUTTON
S1
SCREW,42-D020523
4
MAINFRAME
S2
SCREW
5
SHIELD
S3
SCREW
6
REAR COVER B203H DVI
S5
SCREW
39
Part List
Above picture show the description of the following component.
Item
Picture
Description
Main Frame
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1
Bezel
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2
3
Panel
40
4
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Power Board
5
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Main Board
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6
41
Audio Board(B203H+AUDIO)
Chapter 7
Schematic Diagram
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Main Board
42
43
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44
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45
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Power board
46
47
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Audio board (for B203H+AUDIO)
48
Key board
UDZSNP5.6B
1
add ZD001 and ZD002 for ESD solution
LED001 LED
2
3
1
R001
C004
NC
ECOLOR AUTO
MENU
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CN001
VOL-
VOL+
POWER
R003
1K 1/16W 5%
C007
MENU
AUTO
1
3
5
7
9
11
2
4
6
8
10
12
SW001
JB41-03521
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ECOLOR(GND) 0 V
NC
VOL+
AUTO
CONNECTOR
2K OHM 1/16W
C006
C008
NC
0 V
ECOLOR
LBADC2
VOL- (GND)
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MENU
LBADC1
R002
C005
NC
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CONN
C002 C003
NC
NC
POWER_Key
C001
NC
2K OHM 1/16W
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LED_BLUE#
LED_RED#
VOL+
LBADC1
LBADC2
POWER_Key
LED_BLUE#
LED_RED#
1
UDZSNP5.6B
NC
ZD002
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2
CN001
1
2
3
4
5
6
4
VOL-
ZD001
2
LED
49
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