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HW191A
Service Manual
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HannStar HW191A Service Manual

H a n n S t a r D i s p l a y C o r p .
022-83718162
www.chinadse.org
022-83715667
Document Title HW191A_XY _HSM Page No.
Document No.
Service Manual
Revision
1 /72
07/08/13
Model Name:HW191A
Model No:HSG1033
19” Color TFT LCD Display
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
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022-83715667
Document Title HW191A_XY _HSM Page No.
Document No.
Copyright Copyright © 2006 by HannStar Corporation. 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 HannStar Corporation. Disclaimer HannStar makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further, HannStar reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of HannStar to notify any person of such revision or changes. Trademarks Opt quest is a registered trademark of HannStar Corporation. HannStar is a registered trademark of HannStar Corporation. All other trademarks used within this document are the property of their respective owners.
Revision
2 /72
07/08/13
Revision History
Revision SM Editing Date ECR Number Description of Changes TPV Model
A00 Oct.-17-08 First Version Release T98HRDDTWNHZACE
T98HRDDBWNZHACE
A01 Nov.-04-08 Add New Model In Item 16
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
T98HRDDYWNHZACE
T98HRDDKWNHZACE
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Document Title HW191A_XY _HSM Page No.
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TABLE OF CONTENTS
1. Dimensions 4
2. Precautions and Safety Notice 6
3.Monitor Specification 7
4.LCD Monitor Description 8
5.Operation Instruction 9
6. Input/output Specification 14
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07/08/13
7. Mechanical Instructions 18
8. Block Diagram 21
9.Schematic 27
10.PCB Layout 34
11. Maintainability 39
12 DDC Instruction 45
13. White-Balance, Luminance adjustment 58
14.Monitor Exploded View 60
15. BOM List 61
16. Different Parts List 72
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Document Title HW191A_XY _HSM Page No.
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1. Dimensions
1.1 Front View
Revision
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1.2 Back View
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1.3 Side View
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1.4 Bottom View
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2. Precautions and Safety Notices
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools
should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order
to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may
damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.
AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be
done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad
evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first
satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service
method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or
other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC. AOC
assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS
SERVICE MANUAL.
Take care during handling the LCD module with backlight unit.
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the
panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
‐Ifthesurfaceofpanelbecomesdirty,pleasewipeitoffwithasoftmaterial.(Cleaningwithadirtyorroughclothmaydamage
thepanel.)
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
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3. Monitor Specifications
Revision
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07/08/13
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Document Title HW191A_XY _HSM Page No.
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4. LCD Monitor Description
Assembly Description
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.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each
voltage.
Power board
(Include: adapter, inverter)
CCFL Drive.
Monitor Block Diagram
Flat Panel and
CCFL backlight
main board
Revision
RS232 Connector
For white balance
adjustment in factory
mode
8 /72
07/08/13
Key board
AC-IN
100V-240V
HOST Computer
Video signal, DDC
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5. Operating Instructions
5.1 General Instructions
Press the power button to turn the monitor on or off. The control buttons are located in the front 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, the power indicator will light up.
-
5.2 Control Buttons
Revision
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Document Title HW191A_XY _HSM Page No.
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FRONT PANEL CONTROL
• Power Button:
Press this button to switch ON/OFF monitor’s power.
• Power Indicator:
Green — Power On mode.
Orange — Power Saving mode.
• MENU / RETURN:
1. Turn the OSD menu on/off or return to the previous menu.
2. Exit OSD menu when in volume OSD status.
• Adjust ▲▼:
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1. Adjust Brightness and volume when the OSD is off.
2. Navigate through adjustment icons when OSD is ON or adjust a function when function is
activated.
• A Button:
HW191A:
1. The OSD menu is used as “confirmation” function during start-up.
2. The 「Auto adjustment」 function works only for VGA input. (The auto adjustment function is
used to optimize the 「horizontal position」, 「vertical position」,「clock」,and 「phase」.)
NOTES:
• Do not install the monitor in a location near heat sources such as radiators or air dusts, or in a
place subject to direct sunlight, or excessive dust or mechanical vibration or shock.
• Save the original shipping box and packing materials, as they will come in handy if you ever have
to ship your monitor.
• For maximum protection, repackage your monitor as it was originally packed at the factory.
• To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be
removed with a cloth lightly dampened with a mild detergent solution. Never use strong solvents
such as thinner, benzene, or abrasive cleaners, since these will damage the cabinet. As a safety
precaution, always unplug the monitor before cleaning it.
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
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5.3 Adjusting the Picture
Revision
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07/08/13
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H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
Document No.
Revision
12 /72
07/08/13
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
022-83718162
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022-83715667
Document Title HW191A_XY _HSM Page No.
Document No.
Revision
13 /72
07/08/13
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
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6. Input/output Specification
6.1 Input Signal Connector
Revision
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6.2 Factory Preset Display Modes
Revision
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Document Title HW191A_XY _HSM Page No.
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6.3 Panel Specification
HannStar Display model HSD190MGW1-A02 is a color active matrix thin film transistor (TFT) liquid crystal display (LCD)
that uses amorphous silicon TFT as switching device. This model is composed of a TFT LCD panel, the voltage reference,
common voltage, DC-DC converter, column, and row driver circuit. This TFT LCD has a 19-inch diagonally measured
active display area with WXGA+ resolution (900 vertical by 1440 horizontal pixel array).
6.3.1 Features
_ 19” WXGA+ TN(Twisted Nematic) mode TFT LCD panel
_ High speed response time
_ 4 CCFLs Backlight system
_ Supported WXGA+ (V:900 lines, H:1440 pixels) resolution
_ Supported to 75Hz refresh rate
_ LCD Timing Controller
_ RoHS compliance
Revision
16 /72
07/08/13
6.3.2 Display Characteristics
6.3.3 Electrical Characteristics
1. TFT LCD Module
2. Backlight Unit
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6.3.4 Optical Characteristics
Measuring Condition
_ Measuring surrounding: dark room
_ Lamp current IBL: (6.5)±0.1mA, lamp freq. FL= 50KHz, Inverter: TDK TBD332LR
_ VDD1=5.0V, fV=60Hz, fDCLK=53.25MHz
_ Surrounding temperature : 25±2oC
_ 30min. Warm-up time.
Revision
17 /72
07/08/13
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
022-83718162
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Document Title HW191A_XY _HSM Page No.
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7. Mechanical Instructions
Step Figure Description
Revision
18 /72
07/08/13
Preparatio
n
Remove
the base
Lay the LCD
on a flat, soft
and clean
surface.
Remove the
screws
remarked in
red
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Remove
rear cover
Revision
19 /72
07/08/13
Remove the
screws
remarked in
red
Remove
the key
board
remove the
shield
Remove the
screws
remarked in
red
disconnecte
d the
connecter
remarked in
red
Remove the
screws
remarked in
red and
disconnecte
d the
connecter
remarked in
red
and
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
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Revision
20 /72
07/08/13
Remove
the boards
The end
Remove the
screws
remarked in
red
The panel
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
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Document Title HW191A_XY _HSM Page No.
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8. Block Diagram
8.1 Software Flow Chat
1
Revision
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07/08/13
2
N
4
5
Y
6
7
Y
Y
N
N
3
9
10
Y
N
12
Y
14
18
N
19
N
11
13
15
17
N
Y
N
Y
16
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
Y
H a n n S t a r D i s p l a y C o r p .
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Document Title HW191A_XY _HSM Page No.
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1) MCU initialize.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappear.
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?
07/08/13
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