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20" LCD Color Monitor Adepia TGL 2020A
Service
Service
Service
Horizontal Frequency
31KHz-82KHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents..........................................................1 5.2 Electrical Block Diagram.....................................19
Important Safety Notice...............................................2 6.Schematic............................................................21
Revision List.................................................................3 6.1 Main Board..............................................................21
1.Product Feature...............................................4 6.2 Power Board........................................................26
2.LCD Monitor Description........................................5 7.PCB Layout..........................................................29
3.Operation Instruction............................................6 7.1 Main Board.....................................................29
3.1 General Instructions.....................................................6 7.2 Power Board........................................................32
3.2 Control Buttons........................................................6 7.3 Key Board...........................................................33
3.3 Adjusting the Picture..........................................8 8.Maintainability.......................................................34
4.Input/Output Specification.......................................11 8.1 Equipments and Tools Requirement......................34
4.1 Input Signal Connector............................................11 8.2 Trouble Shooting..................................................34
4.2 Factory Preset Display Modes...................................13 9.White-Balance, Luminance adjustment.............40
4.3 Power Supply Requirement..................................13 10. Monitor Exploded View.......................................41
4.4 Panel Specification..................................................14 11.BOM List...............................................................42
5.Block Diagram.........................................................17
5.1 Software Flow Chart.............................................17
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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20" LCD Color Monitor Adepia TGL 2020A
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 might 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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20" LCD Color Monitor Adepia TGL 2020A
Revision List
Version Date Revision History TPV Model Name
A00 Sep.-13-07 Initial Release TA7CMANF3WUGDN
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20" LCD Color Monitor Adepia TGL 2020A
1. Monitor Specifications
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20" LCD Color Monitor Adepia TGL 2020A
2. LCD Monitor 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 Inverter board will drive the backlight of panel and DC-DC conversion.
Monitor Block Diagram
CCFL Drive.
Flat Panel and
CCFL Backlight
RS232 Connector
Power Board Main Board For white balance
adjustment in factory
mode
Key board
HOST Computer Video signal, DDC
AC-IN
100V-240V
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20" LCD Color Monitor Adepia TGL 2020A
3. Operating Instructions
3.1 General 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.