Hanns.G HQ171A User manual
17" LCD Color Monitor Hanns.G HQ171A
1
Service
Service
Service
Horizontal Frequency
30-80 kHz
TABLEOFCONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Table Of Contents.......…….................……...........…........1
Revision List.…........................………................……......2
Important Safety Notice.………….…..................……......3
1.Monitor Specification.................................………........4
2.LCD Monitor Description…………………………….......6
3. Operation Instruction…………...............……...........7
3.1.General Instructions...........................…...........7
3.2. Control Button…………….…..............……...............7
3.3 Adjusting the Picture...........................…............8
4. Input/Output Specification............……………............14
4.1.Input Signal Connector............………….................14
4.2.Factory Preset Display Modes.........................15
4.3.Panel Specification.....………………..................16
5. Block Diagram…….…..................…………................18
5.1.Software Flow Chart…………………....….......17
5.2.Electrical Block Diagram…………..…..…………......20
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.Schematic……………...............................….....22
6.1 Main Board…………..............................................22
6.2 Power Board....……………....................................27
6.3 Audio Board....……...............................................29
7.PCB Layout..………….....................................30
7.1.Main Board……….................................................30
7.2.Power Board…......................................................33
7.3 Audio Board....…….......................................35
7.4.Key Board………………......................................35
8. Maintainability………...............................................36
8.1. Equipments and Tools Requirement.....................36
8.2. Trouble Shooting…………....................................36
9. White-Balance, Luminance adjustment...................42
10.Monitor Exploded View……..……………................44
11. BOM List....…….....................................................45
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17" LCD Color Monitor Hanns.G HQ171A
3
Important Safety Notice
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.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)
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17" LCD Color Monitor Hanns.G HQ171A
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2. LCD Monitor Description
Assembly Description
The LCD MONITOR will contain a main board, power board, 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.
AC-IN
100V-240V
Power board
(
Include: ada
p
ter, inverter
)
Flat Panel and
CCFL backlight
main board RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
Video signal, DDC
Monitor Block Diagram
Audio board Key board
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17" LCD Color Monitor Hanns.G HQ171A
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3. Operating Instructions
3.1 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.
3.2 Control Buttons
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17" LCD Color Monitor Hanns.G HQ171A
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FRONT PANEL CONTROL
• Power Button:
Press this button to switch ON/OFF of monitor’s power.
• Power Indicator:
Blue — Power On mode.
Orange — Off mode.
• MENU / ENTER:
1. Activate the OSD menu or adjust the function settings and confirmation or
2. Exit OSD menu when in volume OSD status.
• Volume < >:
1. Activates the volume control when the OSD is OFF.
2. Navigate through adjustment icons when OSD is ON or adjust a function when function is activated.
• Auto Adjust button:
When OSD menu is in off status, press this button to activate the Auto Adjustment function.
(The Auto Adjustment function is used to optimized the H-Position, V-Position, Clock and Focus.)
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.
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17" LCD Color Monitor Hanns.G HQ171A
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3.3 Adjusting the Picture
Adjustment steps:
1. Press the MENU-button to activate the OSD window.
2. Press < or > to select the desired function.
3. Press the MENU-button to select the function that you want to adjust.
4. Press < or > to change the settings of the current function.
5. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust any
other function, repeat steps 2-4.
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17" LCD Color Monitor Hanns.G HQ171A
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4.3 Panel Specification
CLAA170EA07P is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD
panel, driver ICs, control circuit and backlight. By applying 8 bit digital data, 1280×1024, 16.2M-color images are
displayed on the 17.0” diagonal screen. Input power voltage is 5.0V for LCD driving. Inverter for backlight is not
included in this module.
4.3.1 Display Characteristics
4.3.2 Optical Characteristics
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17" LCD Color Monitor Hanns.G HQ171A
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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?
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