AOC 2036Va Schematic
20"LCD Monitor AOC 2036Va
Service
Service
Service
Horizontal Frequency
30-80kHz
TABLE OF CONTENTS
Description Page Description Page
Table of Contents…………………………………….…...1
Revision List……………………………………..……..……2
Important Safety Notice………………………………….…3
1.Monitor Specification.................................……….........4
2.LCD Monitor Description…….…………………….….....5
3.Operation Instruction….................................................6
3.1.General Instructions....................................…...........6
3.2.Control Buttons and Connectors................................6
3.3.OSD Menu….............................................................7
4.Input/Output Specification............……………….........12
4.1.Input Signal Connector............………......................12
4.2.Factory Preset Display Modes…...….......................13
4.3.Panel Specification…………….…………….…….....14
5.Block Diagram….........................................................16
5.1.Software Flow Chart..…...........................................16
5.2.Electrical Block Diagram..…………….…….............18
6.Schematic……………................................................20
6.1.Main Board………...................................................20
6.2.Power Board.......….…............................................24
6.3.Key Board…...………..............................................27
6.4.USB Board…….……..............................................28
7.PCB Layout...…………..............................................30
7.1.Main Board…………...............................................30
7.2.Power Board……....................................................33
7.3.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
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 Monitor AOC 2036Va
Revision List
Version Release Date Revision History Customer Model TPV Model Name
A00 May-31-2009 Initial Release 2036Va TA9GMANQ6WA16N
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20"LCD Monitor AOC 2036Va
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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20"LCD Monitor AOC 2036Va
1. Monitor Specifications
Model number 2036Va
Driving system TFT Color LCD
Viewable Image Size 508.05mm diagonal
LCD Panel
Resolution
Pixel pitch 0.2768mm(H) x 0.2768mm(V)
Video R, G, B Analog lnterface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 165MHz
Horizontal scan range 30 kHz - 80 kHz
Horizontal scanSize(Maximum) 442.8mm
Vertical scan range 55 Hz - 75 Hz
Vertical scan Size(Maximum) 249.075mm
Optimal preset resolution 1600 x 900 (60 Hz)
Highest preset resolution 1600 x 900 (60 Hz) )
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin,DVI-D
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM,TMDS
Power Source 100-240VAC, 50/60Hz
Physical
Characteristics
Environmental
Power Consumption
Speakers 2 x 1W
USB Downstream port (A type)
Connector Type 15-pin Mini D-Sub,DVI-D
Signal Cable Type Detachable
Dimensions & Weight:
Temperature:
Humidity:
Typical < 32W
Standby < 1 W
To USB device,loading<100mA
Height (with base) 378.66mm
Width 496.54mm
Depth 186mm
Weight (monitor only) 4.2kg
Weight (with packaging) 6.1kg
Operating 0° to 40°
Non-Operating -20°to 60°
Operating 10% to 85%(non-condensing)
Non-Operating 5% to 80% (non-condensing)
Altitude:
Operating 0~ 3000m (0~ 10000 ft )
Non-Operating 0~ 5000m (0~ 15000 ft )
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20"LCD Monitor AOC 2036Va
2. LCD Monitor Description
The LCD monitor will contain a main board, a power board, a key board and two USB 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.
(Include adapter, inverter, audio)
Power board
Monitor Block Diagram
CCFL Drive.
Main Board
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in factory
mode
AC-IN
100V-240V
KeyBoard
USB Board
HOST Computer
Video signal, DDC
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20"LCD Monitor AOC 2036Va
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located on the side of the monitor.
By changing these settings, the picture can be adjusted to your personal perference.
• 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 Control Buttons and Connections
3.2.1 Control Buttons
Power: Press to turn on or turn off the monitor.
Auto or 16:9 / Up /Source
Press
resolution is wide format, the aspect ratio hotkey is disabled. When the main menu or sub-menu is active, the
functions as to select up or increase value.
Auto/Down/Volume: Auto configure hot key: When the OSD is closed, press Auto button to do auto configure.
key to change the screen aspect ratio between standard Auto format or 16:9 format.When the input
3.2.2 Connections
Cable Connections on Back of Monitor and Computer
key
1. Power
2. Analog (D-SUB-15 VGA cable)
3. Audio
4. DVI
5. USB
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20"LCD Monitor AOC 2036Va
To protect equipment, always turn off the PC and LCD monitor before connecting.
1.Connect the power cable to the AC port on the back of the monitor.
2.Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the
computer's D-Sub port.
3.Connect one end of the DVI cable to the back of the monitor and connect the other end to the computer's DVI port.
4.Turn on your monitor and computer.
3.3 OSD Menu
Eco mode ---DCR, Standard, Text, Internet, Game, Movie, Sports
Notes: When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as
“On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
Color Boost --- Full Enhance, Nature Skin, Sky-Blue, Green Field, Auto Detect, Demo, Off, Exit
Notes:
Full Enhance: Total color saturation is enhanced, suitable for vivid pictures.
Natural Skin: Suitable for human portrait.
Green Field: Suitable for large area of green.
Sky Blue: Suitable for sky or ocean scene.
Auto Detect: Suitable for outdoor or garden.
Demo: Screen divided into two for comparison purpose.
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20"LCD Monitor AOC 2036Va
Luminance ---Brightness, Contrast, Gamma
Notes: When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as
“On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
Image Setup ---Clock, Phase, H.Position, V.Position, Exit
Color Temperature ---User-R, User-G, User-B, Normal, Warm, Cool, sRGB, Exit
Picture Boost --- V.Position, H.Position, Contrast, Brightness, Frame Size, Bright Frame, Exit
Extra---Language, Reset, DDC-CI, OSD Timeout, Transparency, V. Position, H. Position, Off Timer*,Exit
*There is Off Timer function for this model, you can set it to turn off automatically.
Exit
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20"LCD Monitor AOC 2036Va
OSD Control Function
Main Menu
Icon
1nd Menu Icon 1nd Sub Menu
Item
DCR
Eco Mode Picture Adjustment
Full Enhance RGB and brightness enhance N/A
Nature Skin Red enhance N/A
Sky- blue Blue enhance N/A
Green Field Green enhance N/A
Auto Detect RGB enhance N/A
Demo Enhance area in half picture ON/OFF
OFF Disable color boost N/A
Brightness
Contrast
Gamma Gamma adjustment
Description
Dynamic contrast ratio
Backlight adjustment
each step will
increase/decrease value by 1
Contrast from digital-register.
each step will
increase/decrease value by 1
Adjust
Range
N/A
Standard
Te xt
Internet
Game
Movie
Sports
00-100
00-100
Gamma1
Gamma2
Gamma3
Reset Value
Recall OFF
Value
Recall
Standard Value
Recall OFF
Value
Recall OFF
Value
Recall OFF
Value
Recall OFF
Value
Recall OFF
Value
Recall OFF
Value
Recall OFF
Value
Recall Warm
Brightness
Value 90
Recall Warm
Contrast Value
50
Recall
Gamm1
Adjust picture phase to reduce
Clock
Phase
H. Position
V. Position
User / R
User / G
User / B
Normal
(7300K)
Vertical-Line noise
each step will increase/decrease
value by 1
Adjust picture clock to reduce
Horizontal-Line noise.
each step will increase/decrease
value by 1 or 2
Adjust the horizontal position of
the picture.
each step will increase/decrease
value by 1 or 2
Adjust the vertical position of the
picture.
each step will increase/decrease
value by 1 or 2
Red gain from digital-register.
each step will increase/decrease
value by 1
Green gain from digital-register.
each step will increase/decrease
value by 1
Blue gain from digital-register.
each step will increase/decrease
value by 1
Recall Normal color temperature
from EEPROM.
00-100 Do Auto Config
00-100 Do Auto Config
00-100 Do Auto Config
00-100 Do Auto Config
00-100
00-100
00-100
N/A
The Color
Temperature
will be set to
Warm.
The User
R/G/B value
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20"LCD Monitor AOC 2036Va
Warm
(6500K)
Cool
(9300K)
sRGB
V. Position
H. Position
Contrast
Brightness
Frame Size Adjust the Size of the Frame 14-100
Bright
Frame
Language
Reset
DDC CI
Timeout
Transparen
ce
V. Position
H. Position
OFF time
Recall Warm color temperature
from EEPROM.
Recall Cool color temperature
from EEPROM.
Recall sRGB color temperature
from EEPROM.
Adjust the vertical position of the
Frame
Adjust the horizontal position of
the Frame
Contrast Adjustment for Enhance
Area
Brightness Adjustment for
Enhance Area
Enable/Disable Bright Frame ON/OFF
Set OSD display language to
English.（English is default setting）
Clear each old status of
Auto-configuration and set the
color temperature to Warm
Do not execute reset, return to
main menu.
Support DDC/CI Function YES
Unsupported DDC/CI Function NO
Adjust the OSD timeout.
each step will increase/decrease
value by 5
Adjust the OSD transparent each
step will increase/decrease value
by 25
Adjust the vertical position of the
OSD.
each step will increase/decrease
value by 5
Adjust the horizontal position of
the OSD.
each step will increase/decrease
value by 5
Adjust the DC off time
each step will increase/decrease
value by 1 ( unit: Hour )
N/A
N/A
N/A
00-100 Recall 0 Value
00-100 Recall 0 Value
00-100
00-100
English
Français
Español
Português
Deutsch
Italiano
Nederland
s
Svenska
Suomi
Polski
Čeština
Pycckий
Korean
繁體中文
简体中文
YES
NO
05-120
00-100
00-100 Recall 0 Value
00-100
00-24 Recall 0 Value
(default is 50)
will not be
Modified by
Reset function
in user mode.
Recall 50
Value
Recall 50
Value
Recall 14
Value
Recall OFF
Value
No need to
recall language
while press
“RESET”.
If customer
have different
request,
please refer to
customer
request
NA
Yes
Recall 10
Value
Recall 0
Value
Recall 100
Value
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20"LCD Monitor AOC 2036Va
A
Exit Exit the main OSD N/A N/A
Main Menu
Item
Menu
▲
▼
Power
menu+ DC
power on
▲+▼
DC power
on
Main Menu Icon
Status LED Color
st
Sub
1
Menu
Item
Menu
Turn on main menu / enter
Image
ratio
Input
Select
Volume、
Auto
Config
power
Key lock /
unlock
Factory
mode
Select image ratio from auto, 16:9
( can’t change when input is wide
timing )
Select input signal from auto,
analog and digital
Adjust the volume/
Clock, Focus and H/V Position of
picture
Turn on/off power
Enable / disable key function
Into factory mode for auto color
adjustment
Description
uto Adjust the
Adjust
Range
AUTO
16:9
AUTO
D-SUB
DVI-D
N/A
Reset Value
N/A
Select auto or
wide format for
display
N/A
N/A
N/A
Full Power Mode Blue
Active-off Mode Orange
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20"LCD Monitor AOC 2036Va
4. Input/Output Specification
4.1 Input Signal Connector
Analog connectors
Pin No. Description Pin No. Description
1 Video-Red 9 +5V
2 Video-Green 10 Ground
3 Video-Blue 11 N.C.
4 N.C. 12 DDC-Serial Data
5 Detect Cable 13 H-Sync
6 GND-R 14 V-Sync
7 GND-G 15 DDC-Serial Clock
8 GND-B
Digital connectors
Pin No. Description Pin No. Description
1
2
3 TMDS data 2/4 Shield 15 GND (return for +5V, hsync, vsync)
4
5
6 DDC Clock 18
7 DDC Data 19 TMDS data 0/5 Shield
8 Analog Vertical Sync 20
9
10
TMDS data 2－
TMDS data 2＋
TMDS data 4－
TMDS data 4＋
TMDS data 1－
TMDS data 1＋
13
14
16 Hot Plug Detect
17
21
22 TMDS Clock Shield
TMDS data 3＋
＋5V Power
TMDS data 0－
TMDS data 0＋
TMDS data 5－
TMDS data 5＋
11 TMDS data 1/3 Shield 23 TMDS Clock +
12
TMDS data 3－
24
TMDS Clock －
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20"LCD Monitor AOC 2036Va
4.2 Factory Preset Display Modes
Stand Resolution Horizontal Frequency(kHZ) Vertical Frequency(Hz)
VGA 640×480 @60Hz DMT 31.469 59.940
VGA 640×480 @67Hz MAC 35.000 66.667
VGA 640×480 @72Hz DMT 37.861 72.809
VGA 640×480 @75Hz DMT 37.500 75.000
Dos-mode 720×400 @70Hz DOS 31.469 70.087
SVGA 800×600 @56Hz DMT 35.156 56.250
SVGA 800×600 @60Hz DMT 37.879 60.317
SVGA 800×600 @72Hz DMT 48.077 72.188
SVGA 800×600 @75Hz DMT 46.875 75.000
SVGA 832×624 @75Hz 49.725 74.550
XGA 1024×768 @60Hz DMT 48.363 60.004
XGA 1024×768 @70Hz DMT 56.476 70.069
XGA 1024×768 @75Hz DMT 60.023 75.029
WSXGA 1600×900 @60Hz DMT 60.000 60.000
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20"LCD Monitor AOC 2036Va
4.3 Panel Specification
4.3.1 General Features
LM200WD1-TLC1 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent Lamp
(CCFL) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive
type display operating in the normally white mode. It has a 20.0 inch diagonally measured active display area with
HD+ resolution (900 vertical by 1600 horizontal pixel array) Each pixel is divided into Red, Green and Blue
sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is
determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7M colors with
Advanced-FRC (Frame Rate Control). It has been designed to apply the interface method that enables low power,
high speed, low EMI. FPD Link or compatible must be used as a LVDS (Low Voltage Differential Signaling) chip. It is
intended to support applications where thin thickness, wide viewing angle, low power are critical factors and graphic
displays are important. In combination with the vertical arrangement of the sub-pixels, the LM200WD1-TLC1
characteristics provide an excellent flat panel display for office automation products such as monitors.
4.3.2 Display Characteristics
Active screen size 20.0 inches (508.05mm) diagonal
Outline Dimension 462.8(H) x 272.0(V) x 14.5(D) mm(Typ.)
Pixel Pitch 0.0922*RGB(H)mm x 0.2766(V)mm
Pixel Format 1600 horizontal By 900 vertical Pixels. RGB stripe arrangement
Interface LVDS 2Port
Color depth 16.7M colors
Luminance, white 250 cd/m2 ( Center 1Point, typ)
Viewing Angle (CR>10) R/L 170(Typ.), U/D 160(Typ.)
Power Consumption Total 15.7W(Typ.), (3.9W@VLCD , 11.8W@IBL =8.0mA)
Weight 1,620g (Typ.)
Display operating mode Transmissive mode, normally White
Surface treatments Hard coating (3H), Anti-glare treatment of the front polarizer
4.3.3 Optical Characteristic
Ta= 25°C, VLCD=5.0V, fV=60Hz fCLK=48.9MHz, IBL=8.0mA
Values Units
Parameter Symbol
Min Typ Max
Contrast Ratio CR 700 1000 -
Surface Luminance, white LWH 200 250 - cd/m2
Luminance Variation d WHITE 9P 75 - - %
Response Time
Color Coordinates
[CIE1931]
Rise Time
Decay Time
RED
GREEN
BLUE
WHITE
TrR
TrD
Rx 0.646
Ry 0.334
Gx 0.303
Gy 0.616
Bx 0.147
By 0.067
Wx
14
- 1.1 2.6 ms
- 3.9 7.4 ms
Typ -0.03
0.313
Typ +0.03
20"LCD Monitor AOC 2036Va
Wy 0.329
Color Gamut
Viewing Angle (CR>5)
Viewing Angle (CR>10)
Crosstalk
Luminance uniformity -Angular
dependence (TCO’03)
Color grayscale linearity ∆u’v’ - 0.018 -
x axis, right(f=0°) qr 75 88 - Degree
x axis, left (f=180°) ql 75 88 -
y axis, up (f=90°) qu 70 85 -
y axis, down (f=270°) qd 70 85 -
x axis, right(f=0°) qr 70 85 - Degree
x axis, left (f=180°) ql 70 85 -
y axis, up (f=90°) qu 60 75 -
y axis, down (f=270°) qd 70 85 -
LR - - 1.7
- 72 - %
- - 1.5 %
4.3.4 Electrical Characteristics
(1) TFT-LCD
Parameter Symbol
MODULE :
Power Supply Input Voltage VLCD 4.5 5.0 5.5 Vdc
Permissive Power Input Ripple VLCD - - 0.2 V
Power Supply Input Current
Power Consumption PLCD - 3.9 4.7 Watt
Inrush current IRUSH - - 3.0 A
(2) Backlight
Values Unit
Min Typ Max
ILCD-MOSAIC - 780 935 mA
ILCD-BLACK - 950 1140 mA
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20"LCD Monitor AOC 2036Va
5. Block Diagram
5.1 Software Flow Chat
1
2
N
4
5
Y
6
7
Y
Y
3
N
N
18
9
10
Y
N
N
12
Y
14
19
N
15
11
13
17
N
Y
N
16
Y
Y
16
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