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

1

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

2

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.)

3

20"LCD Monitor				AOC 2036Va
1. Monitor Specifications
		Model number	2036Va
		Driving system	TFT Color LCD
		Viewable Image Size	508.05mm diagonal
		Pixel pitch	0.2768mm(H) x 0.2768mm(V)
	LCD Panel
		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
	Resolution
		Input Connector	D-Sub 15pin,DVI-D
		Input Video Signal	Analog: 0.7Vp-p(standard), 75 OHM,TMDS
		Power Source	100-240VAC, 50/60Hz
		Power Consumption	Typical < 32W
			Standby < 1 W
		Speakers	2 x 1W
		USB Downstream port (A type)	To USB device,loading<100mA
		Connector Type	15-pin Mini D-Sub,DVI-D
		Signal Cable Type	Detachable
			Height (with base)	378.66mm
	Physical
			Width	496.54mm
	Characteristics
		Dimensions & Weight:	Depth	186mm
			Weight (monitor only)	4.2kg
			Weight (with packaging)	6.1kg
		Temperature:	Operating	0° to 40°
			Non-Operating	-20°to 60°
		Humidity:	Operating	10% to 85%(non-condensing)
	Environmental
			Non-Operating	5% to 80% (non-condensing)
		Altitude:	Operating	0~ 3000m (0~ 10000 ft )
			Non-Operating	0~ 5000m (0~ 15000 ft )
			4

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.

Monitor Block Diagram

CCFL Drive.

Flat Panel and

CCFL backlight

Power board

Main Board

RS232 Connector

For white balance

(Include adapter, inverter, audio)

adjustment in factory

mode

Key Board

USB Board

AC-IN

Video signal, DDC

HOST Computer

100V-240V

5

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 key to change the screen aspect ratio between standard Auto format or 16:9 format.When the input resolution is wide format, the aspect ratio hotkey is disabled. When the main menu or sub-menu is active, thekey 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.

3.2.2 Connections

Cable Connections on Back of Monitor and Computer

5

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.

7

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	1nd Menu Icon	1nd Sub Menu		Description			Adjust	Reset Value
	Icon		Item					Range
			DCR		Dynamic contrast ratio			N/A	Recall OFF
									Value
								Standard
								Text	Recall
			Eco Mode		Picture Adjustment			Internet
								Game	Standard Value
								Movie
								Sports
			Full Enhance		RGB and brightness enhance			N/A	Recall OFF
									Value
			Nature Skin		Red enhance			N/A	Recall OFF
									Value
			Skyblue		Blue enhance			N/A	Recall OFF
									Value
			Green Field		Green enhance			N/A	Recall OFF
									Value
			Auto Detect		RGB enhance			N/A	Recall OFF
									Value
			Demo		Enhance area in half picture			ON/OFF	Recall OFF
									Value
			OFF		Disable color boost			N/A	Recall OFF
									Value
			Brightness		Backlight adjustment			00-100	Recall Warm
					each	step	will		Brightness
					increase/decrease value by 1				Value 90
					Contrast from digital-register.				Recall Warm
			Contrast		each	step	will	00-100	Contrast Value
					increase/decrease value by 1				50
			Gamma		Gamma adjustment			Gamma1	Recall
								Gamma2
									Gamm1
								Gamma3
				Adjust picture phase to reduce
			Clock	Vertical-Line noise				00-100	Do Auto Config
				each step will increase/decrease
				value by 1
				Adjust picture clock to reduce
			Phase	Horizontal-Line noise.				00-100	Do Auto Config
				each step will increase/decrease
				value by 1 or 2
				Adjust the horizontal position of
			H. Position	the picture.				00-100	Do Auto Config
				each step will increase/decrease
				value by 1 or 2
				Adjust the vertical position of the
			V. Position	picture.				00-100	Do Auto Config
				each step will increase/decrease
				value by 1 or 2
			User / R	Red gain from digital-register.				00-100	The Color
				each step will increase/decrease
				value by 1					Temperature
				Green gain from digital-register.					will be set to
			User / G	each step will increase/decrease				00-100	Warm.
				value by 1
				Blue gain from digital-register.
			User / B	each step will increase/decrease				00-100
				value by 1					The User
			Normal	Recall Normal color temperature				N/A
			(7300K)	from EEPROM.					R/G/B value
				9

20"LCD Monitor							AOC 2036Va
			Warm	Recall Warm color temperature		N/A	(default is 50)
			(6500K)	from EEPROM.			will not be
			Cool	Recall Cool color temperature		N/A	Modified by
			(9300K)	from EEPROM.			Reset function
							in user mode.
			sRGB	Recall sRGB color temperature		N/A
				from EEPROM.
			V. Position	Adjust the vertical position of the		00-100	Recall 0 Value
				Frame
			H. Position	Adjust the horizontal position of		00-100	Recall 0 Value
				the Frame
			Contrast	Contrast Adjustment for Enhance		00-100	Recall 50
				Area			Value
			Brightness	Brightness Adjustment for		00-100	Recall 50
				Enhance Area			Value
			Frame Size	Adjust the Size of the Frame		14-100	Recall 14
							Value
			Bright	Enable/Disable Bright Frame		ON/OFF	Recall OFF
			Frame				Value
						English
						Français
						Español	No need to
						Português
							recall language
						Deutsch
							while press
						Italiano
							“RESET”.
						Nederland
			Language	Set OSD display language to		s	If customer
					Svenska
				English. English is default setting			have different
						Suomi
							request,
						Polski
							please refer to
						Čeština
							customer
						Pycckий
							request
						Korean
				Clear each old status of
				Auto-configuration and set the		YES	NA
			Reset	color temperature to Warm
				Do not execute reset, return to		NO
				main menu.
			DDC CI	Support DDC/CI Function		YES	Yes
				Unsupported DDC/CI Function		NO
			Timeout	Adjust the OSD timeout.		05-120	Recall 10
				each step will	increase/decrease
							Value
				value by 5
			Transparen	Adjust the OSD transparent each			Recall 0
				step will increase/decrease value		00-100
			ce	by 25			Value
				Adjust the vertical position of the
			V. Position	OSD.		00-100	Recall 0 Value
				each step will increase/decrease
				value by 5
				Adjust the horizontal position of
			H. Position	the OSD.		00-100	Recall 100
				each step will increase/decrease			Value
				value by 5
				Adjust the DC off time
			OFF time	each step will increase/decrease		00-24	Recall 0 Value
				value by 1 ( unit: Hour )

10

20"LCD Monitor

AOC 2036Va

		Exit	Exit the main OSD	N/A	N/A

	Main Menu		1st Sub		Adjust
		Main Menu Icon	Menu	Description		Reset Value
	Item				Range
			Item
	Menu		Menu
				Turn on main menu / enter		N/A

			Image	Select image ratio from auto, 16:9 AUTO			Select auto or
				( can’t change when input is wide			wide format for
			ratio			16:9
▲				timing )			display
			Input	Select input signal from auto,		AUTO
						D-SUB
			Select	analog and digital
						DVI-D
			Volume Adjust the volume/Auto Adjust the
▼			Auto	Clock, Focus and H/V Position of				N/A
			Config	picture
			power	Turn on/off power
Power								N/A
menu+ DC			Key lock /	Enable / disable key function				N/A
power on			unlock
▲+▼			Factory	Into factory mode for auto color				N/A
DC power
			mode	adjustment
on
		Status	LED Color

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	TMDS data 2	13	TMDS data 3
2	TMDS data 2	14	5V Power
3	TMDS data 2/4 Shield	15	GND (return for +5V, hsync, vsync)
4	TMDS data 4	16	Hot Plug Detect
5	TMDS data 4	17	TMDS data 0
6	DDC Clock	18	TMDS data 0
7	DDC Data	19	TMDS data 0/5 Shield
8	Analog Vertical Sync	20	TMDS data 5
9	TMDS data 1	21	TMDS data 5
10	TMDS data 1	22	TMDS Clock Shield
11	TMDS data 1/3 Shield	23	TMDS Clock +
12	TMDS data 3	24	TMDS Clock

12

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

Parameter

Symbol

Values

Units

Min

Typ

Max

Contrast Ratio

CR

700

1000

-

Surface Luminance, white

LWH

200

250

-

cd/m2

Luminance Variation

d WHITE

9P

75

-

-

%

Response Time

Rise Time

TrR

-

1.1

2.6

ms

Decay Time

TrD

-

3.9

7.4

ms

Color Coordinates

RED

Rx

Typ -0.03

0.646

Typ +0.03

[CIE1931]

Ry

0.334

GREEN

Gx

0.303

Gy

0.616

BLUE

Bx

0.147

By

0.067

WHITE

Wx

0.313

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20"LCD Monitor																						AOC 2036Va
									Wy					0.329
	Color Gamut											-		72					-				%
	Viewing Angle (CR>5)
				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					-
	Viewing Angle (CR>10)
				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					-
	Crosstalk											-		-					1.5				%
	Luminance uniformity -Angular								LR			-		-					1.7
	dependence (TCO’03)
	Color grayscale linearity								∆u’v’			-		0.018					-
4.3.4 Electrical Characteristics
(1) TFT-LCD
				Parameter					Symbol							Values						Unit
													Min			Typ			Max
			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						ILCD-MOSAIC			-			780				935			mA
									ILCD-BLACK			-			950				1140			mA
			Power Consumption						PLCD			-			3.9				4.7			Watt
			Inrush current						IRUSH			-			-				3.0			A

(2) Backlight

15

20"LCD Monitor

5. Block Diagram

5.1 Software Flow Chat

1

2

N

4

5

Y

6

7

Y

9

AOC 2036Va

Y

3

N

N

8

	10	N
		11
	Y
N	12	13	N
	Y	Y
	14	15	N
			16
		Y
		17

N

18 19

Y

16