AOC i2430Ve Schematic

23" LCD Color Monitor AOC i2430Ve

Service

Horizontal Frequency

30-83 kHz

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 Connections...............................6

3.3.OSD Setting…...........................................................8

4.Input/Output Specification...............……………….......20

4.1.Input Signal Connector...............………..................20

4.2.Preset Display Modes……..........................21

4.3.Panel Specification…………..……………………..22

5.Block Diagram….........................................................24

5.1.Main Board…..….............................................24

5.2.Power Board…………..…………………………......25

6.Schematic…………..….........................................26

6.1.Main Board..…….…...........................................26

6.2.Power Board..……….........................................30

6.3.Key Board..……….........................................32

6.4.Light Sensor Board...............................................33

7.PCB Layout..………..............................................34

7.1.Main Board………..…........................................34

7.2.Power Board….…..............................................35

7.3.Key Board………..…..........................................37

7.4. Light Sensor Board.….........................................37

8.Maintainability………............................................38

8.1.Equipments and Tools Requirement…...............38

8.2.Trouble Shooting…..………...............................39

9.FOS Testing………..…………………………………43

10.Firmware and DDC Instruction……………….….47

11.White-Balance,Luminance Adjustment…............65

12. Mechanical Instructions………………….....….......67

13.Monitor Exploded View……................................72

14.BOM List…………..……………………….............73

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

Revision List

Revision Date Revision History Remark

TDAGNT2EWWA4HNE

A00 Jan.-12-2011 Initial release

TDAGNT2DWWA4HNE

TDAGNT2FWWA4HNE

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.)

Monitor Specifications

LCD Monitor Description

The LCD MONITOR will contain a main board, a power board, 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.

PWPC board

(Include: adapter, inverter)

AC-IN

100V-240V

Monitor Block Diagram

LED Drive.

Main Board

Key board

Flat Panel and LED backlight

HOST Computer

RS232 Connector For white balance adjustment in factory mode

Video signal DDC

3. Operating Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor

(See Figure ). By changing these settings, the picture can be adjusted to your personal preferences.

* The power cord should be connected.

* Press the power button to turn on the monitor. The power indicator will light up.

3.2 Control Buttons and Connections

4:3 or wide image ratio hot key: When there is no OSD, press> continuously to change 4:3 or wide image ratio. (If

the product screen size is 4:3 or input signal resolution is wide format, the hot key is disable to adjust)

e-Sensor hot key. When there is no OSD,Press < continuously to select the e - Sensor mode(e-Sensor mode hot

key may not be available in all mode ls). e-Sensor:The infrared sensor can detect if user is in front of monitor and

adjust monitor brightness automatically to save power. When it is on, we can select the detect range

[Near,Average,Far] by using hot-key.

Auto configure hot key When there is no OSD, press Auto/Source button continuously about 2 second to do auto

configure (Only for the

Source hot key When the OSD is closed, press Source butt on will be Source hot key function. Press Source button

continuously to select the input source showed in the message bar , press Menu/Enter button to change to the

source selected.

1.Power

2.Analog (DB-15 VGA cable)

3.Power

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. (Optional – Requires a video card with DVI port) - 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. Connect the audio cable to audio in port on the back of the monitor.

5. Turn on your monitor and computer.

If your monitor displays an image, installation is complete. If it does not display an image, please refer

Troubleshooting

3.3 OSD Setting

1) Press the MENU-button to activate the OSD window.

2) Press ◄ or ► to navigate through the functions. Once the desired function is highlighted, press the

MENU-button to activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it.

3) Press ◄ or ► to change the settings of the selected function. Press ◄ or ► to select another function in

sub-menu . Press AUTO to exit . If you want to adjust any other function, repeat steps 2-3.

4) OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press

power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off

and then press power button to turn the monitor on. 5）e-Sensor hot key: When there is no OSD,Press ◄ continuously to select the e-Sensor mode(e-Sensor mode hot

key may not be available in all models).

Notes:

1) If the product has only one signal input, the item of "Input Select" is disable to adjust.

2) If the product screen size is 4:3 or input signal resolution is wide format, the item of "Image Ratio" is disable to

adjust.

3) One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.

Luminance

Press (Menu) to display menu.

Press Menu to display MENU

Press ◄ or ► to select (Luminance), and

press

Press ◄ or ►to select submenu, press to enter, and press ◄ or ► to adjust.

Press to exit.

to enter.

Brightness 0-100 Backlight Adjustment

Contrast 0-100 Contrast from Digital-register.

Standard

Eco mode

Text

Internet

Game

Movie

Sports

Gamma1 Adjust to Gamma1

Gamma

Gamma2 Adjust to Gamma 2

Gamma3 Adjust to Gamma 3

DCR On/OFF

Standard Mode

Text Mode

Internet Mode

Game Mode

Movie Mode

Sports Mode

Enable dynamic contrast ratio

Image Setup

Press (Menu) to display menu.

Press ◄ or ► to select (Image Setup),

and press

Press ◄ or ► to select submenu, press to enter, and press ◄ or ► to adjust.

Press to exit.

to enter.

Clock 0-100 Adjust picture Clock to reduce Vertical-Line noise.

Phase 0-100 Adjust Picture Phase to reduce Horizontal-Line noise

H.Position 0-100 Adjust the horizontal position of the picture.

V.Position 0-100 Adjust the vertical position of the picture.

Color Temperature

Press (Menu) to display menu.

Press ◄ or ► to select (Color

Temperature), and press

Press ◄ or ► to select submenu, press to enter, and press ◄ or ► to adjust.

Press to exit.

to enter.

Warm

Normal

Cool

sRGB

User

6500K

7300K

9300K

Red Red Gain from Digital-register

Green Green Gain Digital-register.

Blue Blue Gain from Digital-register

Recall Warm Color Temperature from EEPROM.

Recall Normal Color Temperature from EEPROM.

Recall Cool Color Temperature from EEPROM.

Recall SRGB Color Temperature from EEPROM.

Color Boost

Press (Menu) to display menu.

Press ◄ or ► to select (Color Boost),

and press

Press ◄ or ► to select submenu, press to enter, and press ◄ or ► to adjust.

to enter.

Press to exit.

Full Enhance on or off Disable or Enable Full Enhance Mode

Nature Skin on or off Disable or Enable Nature Skin Mode

Green Field on or off Disable or Enable Green Field Mode

Sky-blue on or off Disable or Enable Sky-blue Mode

AutoDetect on or off Disable or Enable AutoDetect Mode

Demo on or off Disable or Enable Demo

Picture Boost

Press (Menu) to display MENU.

Press ◄ or ► to select

press

Press ◄ or ► to select Bright Frame. Select “on” to

activate Picture Boost.

Press ◄ or ► to select submenu, press to enter, and press ◄ or ► to adjust.

to enter.

(Picture Boost); and

Press to exit.

Frame Size 14-100 Adjust Frame Size

Brightness 0-100 Adjust Frame Brightness

Contrast 0-100 Adjust Frame Contrast

H. position 0-100 Adjust Frame horizontal Position

V.position 0-100 Adjust Frame vertical Position

Bright Frame on or off Disable or Enable Bright Frame

OSD Setup

Press (Menu) to display menu.

Press ◄ or ► to select (OSD Setup),

and press

Press ◄ or ► to select submenu, press to enter, and press ◄ or ► to adjust.

Press to exit.

to enter.

OSD Setup

H.Position 0-100 Adjust the horizontal position of OSD

V.Position 0-100 Adjust the vertical position of OSD

Timeout 5-120 Adjust the OSD Timeout

Transparence 0-100 Adjust the transparence of OSD

Language

Select the OSD language

Extra

Press (Menu) to display menu.

Press ◄ or ► to select (OSD Setup),

and press

Press ◄ or ► to select submenu, press

to enter, and press ◄ or ► to adjust.

to enter.

Press to exit.

Auto

Input Select

Auto Config yes or no Auto adjust the picture to default

Image Ratio wide or 4:3 Select wide or 4:3 format for display

DDC-CI yes or no Turn ON/OFF DDC-CI Support

Off Timer 0~24hours

Analog

Digital

Select to Auto Detect input signal

Select Analog Sigal Source as Input

Select Digital Sigal Source as Input

Select timing to turn off the monitor.

Information

Show the information of the main image and

sub-image source

Reset

Press (Menu) to display menu.

Press ◄ or ► to select (Reset), and

press

Press◄ or ► to select YES or NO.

Press to exit.

to enter.

Reset yes or no Reset the menu to default

Exit

Press (Menu) to display menu.

Press ◄ or ► to select (Exit); and press

to enter.

Exit Exit the main OSD

LED Indicator

Status LED Color

Full Power Mode Blue

Active-off Mode Orange

4. Input/Output Specification

4.1 Input Signal Connector

Analog connectors

Pin Number 15-Pin Side of the Signal Cable

1 Video-Red

2 Video-Green

3 Video-Blue

4 N.C.

5 Detect Cable

6 GND-R

7 GND-G

8 GND-B

9 +5V

10 Ground

11 N.C.

12 DDC-Serial data

13 H-sync

14 V-sync

15 DDC-Serial clock

DVI connectors

Pin No. Signal Name Pin No. Signal Name Pin No. Signal Name

1 TMDS Data 2- 9 TMDS Data 1- 17 TMDS Data 02 TMDS Data 2+ 10 TMDS Data 1+ 18 TMDS Data 0+ 3 TMDS Data 2/4 Shield 11 TMDS Data 1/3 Shield 19 TMDS Data 0/5 Shield 4 TMDS Data 4- 12 TMDS Data 3- 20 TMDS Data 55 TMDS Data 4+ 13 TMDS Data 3+ 21 TMDS Data 5+ 6 DDC Clock 14 +5V Power 22 TMDS Clock Shield 7 DDC Data 15 Ground(for+5V) 23 TMDS Clock + 8 N.C. 16 Hot Plug Detect 24 TMDS Clock -

4.2 Preset Display Modes

4.3 Panel Specification

4.3.1 General Features

LM230WF3 is a Color Active Matrix Liquid Crystal Display with a Light Emitting Diode ( White LED) backlight The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally black mode. It has a 23 inch diagonally measured active display area with FHD resolution (1080 vertical by 1920 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 A-FRC (Advanced Frame Rate Control).

4.3.2 General Specifications

4.3.3 Electrical Characteristics

LED Bar Electrical Characteristics

(Ta= 25± 2℃, VLCD =5.0V, VLCD=5.0V, Fv=60Hz,)

4.3.4Optical Characteristics

(Ta=25 °C, VLCD=5V, fV=60Hz Dclk=144MHz, IBL=110mA)

5. Block Diagram

5.1 Main Board

FLASH MEMORY

Pm25LD020C-SCE

(U402)

Crystal 12MHZ

(X401)

D-Sub



Scalar NT68668AUFG

(Include :MCU,ADC,OSD etc)

H sync V sync

RGB



(U401)

DVI

LCD Interface

(CN301)

Key Control

Interface (CN401)

DVI

Input

signal

Connector

(CN101)

DDC1_SCL DDC1_SDA

EEPROM

M24C02

(U101)



Connector

(CN102)

DDC2_SCL DDC2_SDA

EEPROM

M24C02

(U102)



(

5.2 Power Board

AC input

EMI filter

Bridge Rectifier and Filter

Transformer

(T901)

Rectifier diodes

Start Resistor

(R904)

PWM Control

LD7750GS

IC901)

Power Switch

(Q901)

Photo coupler

(IC903)

14.5V

L801

D801

MOSFET

(Q806)

OFF

DIM

PWM Control

MP3389EF

(U801)

14.5V

Feedback

Circuit

Regulator

(IC904)

LED

(CN803)

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