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Acer B203H Service Guide
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Service Guide Version and Revision
Version A00
Release Date Sep.-22-2008
Revision History Initial Release
TPV model TARSNDD8WDAYDN 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 incidental or consequential damages resulting from any defect in the software.
Intel is a registered trademark of Intel Corporation. Pentium and Pentium II/III are trademarks of Intel Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective holders. Trademarks
Acer is a registered trademark of Acer Incorporated.
All other trademarks are property of their respective owners.
Conventions
The following conventions are used in this manual: Screen messages Note Warning Caution Important
Gives bits and pieces of additional information related to the current topic.
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Alerts you to any damage that might result from doing or not doing specific actions. 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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Denotes actual messages that appear on screen.
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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 provided by your regional Acer office to order FRU parts for repair and service of customer machines. DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list
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 is encouraged to try to correct the interference by one or more of the following measures: 1. Reorient or relocate the receiving antenna. 2. Increase the separation between the equipment and receiver. 3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4. Consult the dealer or an experienced radio/TV technician for help. Notice: interference to radio or television reception, which can be determined by turning the equipment off and on, the user
1. The changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits. 3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to this equipment. It is the responsibility of the user to correct such interference. As ENERGY STAR® Partner our company has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. Warning: To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerous high voltages are present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.
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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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Warning: (For FCC Certified Models)
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Precautions
Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance. Use only a trolley or stand recommended by the manufacturer or sold with the monitor. If you mount the monitor on a wall or shelf, 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 type of power supplied to your home, consult your dealer or local power company. The monitor should be operated only from the type of power source indicated on the label. If you are not sure of The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug.
Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the monitor from damage due to power surges.
Do not overload power strips and extension cords. Overloading can result in fire or electric shock. Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric 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 configured receptacles marked between 100 - 240V AC, Min. 5A. The wall socket shall be installed near the equipment and shall be easily accessible. Special Notes On LCD Monitors To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
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
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shock. Never spill liquids on the monitor.
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only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug,
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Table Of Contents
Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Monitor Block Diagram Main Board Diagram Software Flow chart Main Board Layout Installation Screen Position Adjustment Chapter 2 Operating Instructions External Controls Front Panel Controls eColor Management (OSD) How to Adjust a Setting ................................................ ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. 7 7 8 9 10 13 14 15 16 18 19 20 22 22 22 23 24 27 28
How To Optimize The DOS-Mode Chapter 3 Machine Disassembly
Chapter 4 Chapter 5
Troubleshooting
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Chapter 7
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Exploded Diagram
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Chapter 6
FRU (Field Replacement Unit) List
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Connector Information
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Schematic Diagram
Monitor Features
Introduction
Scope
Chapter 1
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.
Chart of B203H
Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker
LTM200KT01 SEC KR
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D-Sub 15pin;DVI 24pin Separate / Compatible Support DDC2B B203H+AUDIO: B203H : B203H+AUDIO: B203H : Yes No Yes No Not support Yes/Yes
Headphone Jack
USB Hub
Tilt / Swivel
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Microphone Jack
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Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time Analog Input signal Control temperature User brightness control User contrast control Picture position and size Viewing angle AC Supply voltage Ambient temperature Humidity Display mode e-color mode 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 50% ± 10% 1600 x 900, 60 Hz, all white Set to "User" mode
Measurement systems 1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 Lb = kg x 2.2 Degrees F = [°C x 1.8] + 32 Degrees C = [°F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3)
The units of measure stated in this document are listed below:
x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] lux = foot-candle x 10.76 nits = cd/(m2) = Ft-L x 3.426
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LCD Monitor General Specification
Driving system Active Display Area Pixel pitch Contrast Ratio Response time Luminance of White Separate Sync. Input H-Frequency V-Frequency Viewing angle Display Colors Display mode EPA ENERGY STAR® OFF Mode Contrast control (H)90 (V) 90(Type) 16.7M 1600 x 900 @60Hz ON Mode
TFT Color LCD 442.8 (W) × 249.075(H) 0.2768(H) x 0.2768(W) 1000 : 1 5ms 300(Typ.) cd/ H/V TTL
LCD Panel
56-75Hz
Power Source
100 V ~ 240 V50 ± 3Hz, 60 ± 3Hz
Peak surge current Power line surge
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Environmental Considerations
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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%
< 55A peak at 240 VAC and cold starting
No advance effects (no loss of information or defect) with a maximum of 1 half-wave missing per second
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Set to factory preset value, which allows that the brightest two of 32 linear distributed gray-scales (0 700mv) can be distinguished.
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< 48W < 1W
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30kHz 83kHz
LCD Panel Specification
General Specifications
Block Diagram
TFT LCD Module
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Back light Unit
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:
CCFL Drive.
Flat Panel and CCFL backlight
DVI Signal
AC-IN 100V-240V
Key board
Audio board
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. each voltage. B203H: The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
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CCFL Drive. Inverter Board (include adapter) AC-IN 100V-240V Key board 14
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Main Board DVI Signal
Flat Panel and CCFL backlight
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D-SUB Signal D-SUB Signal
Inverter Board (include adapter)
Main Board
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Main Board Diagram
Panel Interface (CN301)
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Keypad Interface (CN402)
Scalar IC NT68667FG (Include MCU, ADC, OSD) (U401)
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EEPROM M24C16 (U403) D-Data D-Clock DVI Connector (CN102)
H sync V sync RGB D-Sub Connector (CN101)
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Flash Memory PM25LV010A-100SCE (U402)
Crystal 12MHz (X401)
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Software Flow Chart
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Y 2 3 N
N
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Y 6
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N
Y 9
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12 Y 14
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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.
8) Enter factory mode. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming? 13) Does the scalar send out an interrupt request? 14) Wake up the scalar.
15) Are there any signals coming from analog port?
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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16) Display "No connection Check Signal Cable" message. And go into standby mode after the
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7) Are the AUTO and SELECT keys pressed?
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Main Board Layout
Symbol U401 U703 U103 U104 U402 U403
Description
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Symbol CN603 CN701 CN301 X401 CN101 CN102 Description WAFER EH-4 WAFER 9P RIGHT ANELE PITCH CONNECTOR CRYSTAL 12MHz HC-49US ARG6-120 D-SUB 15PIN DVI 24PIN CONN F IC AP1117D33L-13 TO252-3L DIODES IC AZC099-04S SOT23-6L IC AZC099-04S SOT23-6L IC PM25LV010A-100SCE SOIC-8 M24C16-WMN6TP
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IC NT68667FG QFP-128L
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Installation
To install the monitor on your host system, please follow the steps below: Steps
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Screen Position Adjustment
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Operating Instructions
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.
Chapter 2
Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the
External Controls
Front panel controls
1. Power Switch: To turn ON or OFF the power. 2. Power LED: 3. Empowering / Exit: Lights up to indicate the power is turned ON.
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: 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. < / > 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 operate properly, there must be a video input signal. 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 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. Using the Right Power Cord video-input signal present. When there is no video input signals this monitor, following a time-out period, will
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 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 Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.
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connector body, rated 10A, 250V, having standard CEE-22 female configuration.
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Machine Disassembly
maintenance.
Disassembly Procedure
1. Remove the hinge assembly.
Chapter 3
This chapter contains step-by-step procedures on how to disassemble the monitor for
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2.
Remove the back cover and bezel.
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3 Remove the lamp connectors and remove the screws to remove the panel. Put attention to the LVDS cable.
4. Remove the screws to remove the main board and power board.
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5. The panel
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FOR THE V203H+AUDIO MODLE
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Troubleshooting
This chapter provides troubleshooting information for the B203H:
1. No Power
Chapter 4
No power
Press power key and look if the picture is normal
NG Please reinsert and make sure the AC of 100-240 is normal
OK
NG
Measure U703 Pin2=3.3V,
NG OK
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Replace X401
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NG OK Replace U401
Check if X401 oscillate waveforms are normal
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Check U703, C706 and C707
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Reinsert or check the power section
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2. No Picture (LED is orange)
No picture
The button if under control
NG
X401 oscillate waveform is normal
NG Replace X401
OK OK Check reset circuit of U401 is normal Measure U703 Pin2=3.3V, NG Check Correspondent component
Replace U401 OK NG
X401 oscillate waveform is normal
NG OK Check HS/VS from CN101 is normal
OK
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Replace U401
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NG 32
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Replace X401 Check Correspondent component
Check U703, C706 and C707
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OK
3. Panel Power Circuit
White screen
Measure Q302 base is low level?
NG
X401 oscillate waveform is normal OK NG
OK Check CN301is solder and Q302,Q301 is OK?
Replace X401
Check reset circuit of U401 is normal
OK
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Replace PANEL
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Check Correspondent component.
NG
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NG Replace U401
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Check Correspondent component.
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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 Is Button Switch normally?
Y NG Is Key Pad Board normally?
Y
Check Main Board
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Replace Key Board
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Replace Button Switch
5. Power Board
1) No power Check CN902 pin4, 5 = 14V NG
Check AC line volt 110V or 220V
OK
NG
Check AC input
Check the voltage of C905(+) NG OK
OK
NG
Check the auxiliary voltage is bigger than 10V and smaller than 20V
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NG NG
OK
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Check IC901 pin6 PWM wave
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1) Check IC901 2) Check R909/D901 circuit Check IC901 35
OK
Check Q901, IC903, D905, D906, D907, ZD921, ZD922
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Check start voltage for the pin8 of IC901
Check R904, R932, R933, and Change IC901
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Check bridge rectified circuit and F901 circut
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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
OK
NG
Change Q808
Check the PWM wave from the pin9,10 of IC801
OK
NG
Check Q802, Q803 PIN5, 6, 7, 8 have the output of square wave at short time.
OK
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NG Change Q802, Q803 Change T801, T802
Check the output of T801, T802
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Check connecter & lamp
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OK
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Change IC801
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Connector Information
Chapter 5
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FRU (Field Replaceable Unit) List
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of B203H. Refer to this
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
Exploded Diagram (Model: B203H)
B203H+AUDIO
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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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BEZEL L201WA-8ACER1-P1 POWER LENS KEY BUTTON MAINFRAME SHIELD
11 S1 S2 S3 S4 S5
HINGE ASSEMBLY SCREW,42-D020523 SCREW SCREW SCREW,42-D020523 SCREW
6 REAR COVER B203H DVI 10 COVER HINGE B203H
1 2 3 4 5 6
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BEZEL L201WA-8ACER1-P1 POWER LENS KEY BUTTON MAINFRAME SHIELD REAR COVER B203H DVI
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10 11 S1 S2 S3 S5
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COVER HINGE HINGE ASSEMBLY SCREW,42-D020523 SCREW SCREW SCREW
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Part List Above picture show the description of the following component.
Item
Picture
Description
1
Main Frame
3
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2
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Bezel Panel
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Power Board
5
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6
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Audio BoardB203H+AUDIO
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Main Board
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Schematic Diagram
Main Board
Chapter 7
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Power board
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Audio board (for B203H+AUDIO)
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Key board
ZD001 2 UDZSNP5.6B 1 LED001 LED 4 3 2 ZD002 LBADC1 LBADC2 POWER_Key LED_BLUE# LED_RED# C001 NC LED_BLUE# LED_RED# 2 1 1 UDZSNP5.6B add ZD001 and ZD002 for ESD solution
CONN
C002 C003 NC NC
C004 NC
C005 NC
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R002 R003
1 2 3 4 5 6
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R001 2K OHM 1/16W 2K OHM 1/16W 1K 1/16W 5%
CN001
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C008
ECOLOR
MENU
AUTO
NC
LBADC2
VOL+ AUTO ECOLOR(GND) 0 V
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1
NC
3
5
7
NC
VOL- (GND)
0 V
VOL+
VOL-
LBADC1
C006
C007
MENU
9
POWER_Key 11 10 12
SW001
JB41-03521
CN001
CONNECTOR
ECOLOR AUTO
MENU
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VOL-
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2
4
6
8
VOL+
POWER
LED
49