Adepia TGL 2020A-20 Service Manual
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
Important Safety Notice.………….…..................……......2
Revision List.…........................………................……......3
1.Product Feature..............................………........4
2.LCD Monitor Description…………………………….......5
3.Operation Instruction…………...............……...........6
3.1 General Instructions.......................................…...........6
3.2 Control Buttons………..…….…..............……...............6
3.3 Adjusting the Picture...........................…............8
4.Input/Output Specification............……………............11
4.1 Input Signal Connector......….…..……........…….........11
4.2 Factory Preset Display Modes.................…...............13
4.3 Power Supply Requirement…………………………....13
4.4 Panel Specification..............………………..................14
5.Block Diagram…….…...................…………................17
5.1 Software Flow Chart…………………….……....….......17
5.2 Electrical Block Diagram…………..……..…..….......19
6.Schematic…………….....................................….....21
6.1 Main Board..............................................................21
6.2 Power Board....…………..........……........................26
7.PCB Layout..…………...........……...........................29
7.1 Main Board………..................……....................29
7.2 Power Board…....................……………..................32
7.3 Key Board……….....…….............……….................33
8.Maintainability………............................……….........34
8.1 Equipments and Tools Requirement......……….......34
8.2 Trouble Shooting………………................................34
9.White-Balance, Luminance adjustment.............40
10. Monitor Exploded View……...………………............41
11.BOM List…................……......................….............42
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.
Power Board
AC-IN
100V-240V
CCFL Drive.
Monitor Block Diagram
Flat Panel and
CCFL Backlight
Main Board
Key board
HOST Computer
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
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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.
• 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.
3.2 Front Panel Control
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20” LCD Color Monitor Adepia TGL 2020A
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20” LCD Color Monitor Adepia TGL 2020A
3.3 Adjusting the Picture
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20” LCD Color Monitor Adepia TGL 2020A
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20” LCD Color Monitor Adepia TGL 2020A
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20” LCD Color Monitor Adepia TGL 2020A
4. Input/Output Specification
4.1 Input Signal Connector
D-SUB
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20” LCD Color Monitor Adepia TGL 2020A
DVI
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20” LCD Color Monitor Adepia TGL 2020A
4.2 Factory Preset Display Modes
4.3 Power Supply Requirement
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range
Peak surge current < 55A peak at 240 VAC and cold starting
Leakage current < 3.5mA
Power line surge
DC output Voltage
50 ± 3Hz, 60 ± 3Hz
No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second
12VDC± 5％
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20” LCD Color Monitor Adepia TGL 2020A
4.4 Panel Specification
CLAA201WA04 is 20.1”(51.11cm) color TFT-LCD (Thin Film Transistor Liquid Crystal Display)module composed of
LCD panel, LVDS driver ICs, control circuit and backlight(CCFL, 4 tubes). By applying 8 bit digital data (6bits+Hi-FRC),
1680×1050, drived by 5 voltages,16.7M-color images are displayed on the 20.1” diagonal screen. The module
structure is fixed by iron frame,without the inverter for the backlight. Interface of data and control signals is typ.
4.4.1 General Features
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20” LCD Color Monitor Adepia TGL 2020A
4.4.2 Optical Characteristics
Ta=25℃，VCC=5.0V
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20” LCD Color Monitor Adepia TGL 2020A
4.4.3 Electrical Characteristics
(1).TFT-LCD
(2).Backlight
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20” LCD Color Monitor Adepia TGL 2020A
5. Block Diagram
5.1 Software Flowing Chart
1
Y
2
N
4
3
N
10
12
5
Y
6
7
9
Y
N
N
Y
N
11
13
8
N
Y
14
18
N
19
Y
17
15
17
Y
N
16
Y
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