AOC e2440Va User Manual

24" LCD Monitor AOC e2440Va
1
Service
Service
Service
Horizontal Frequency
30- 83kHz
Table of Contents
Description Page Description Page
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.
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 Menu…............................................................8
4.Input/Output Specification...............……………….......25
4.1.Input Signal Connector...............………..................25
4.2.Factory Preset Display Modes……..........................26
4.3.Panel Specification…………..………………………..27
5.Block Diagram….........................................................30
5.1.Main Board…..….............................................30
5.2.Power Board…………..…………………………......31
6.Schematic…………..….........................................32
6.1.Main Board..…….…...........................................32
6.2.Power Board..……….........................................37
6.3.Light Sensor Borad……………………………….39
6.4.Key Board…............……....................................40
7.PCB Layout..………..............................................41
7.1.Main Board………..…........................................41
7.2.Power Board….…..............................................42
7.3.Light Sensor Borad…………………………….44
7.4.Key Board………..…..........................................45
8.Maintainability………............................................46
8.1.Equipments and Tools Requirement…...............46
8.2.Trouble Shooting…..………...............................47
9. FOS Testing………………………………………51
10.Firmware and DDC Instruction……………….….55
11.White-Balance,Luminance Adjustment…............73
12.Monitor Exploded View……................................75
13.BOM List…………..……………………….............76
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

AOC e2440Va Specifications

General

Brand	AOC
Model	e2440Va
Category	Monitor
Language	English

Summary

Revision List

Important Safety Notice

Monitor Specifications

LCD Monitor Description

Monitor Block Diagram

Visual representation of the monitor's internal components and connections.

Operating Instructions

General Instructions

Basic guidelines for operating the monitor and adjusting settings.

Control Buttons and Connections

Details on front panel buttons and cable connections for input signals.

OSD Menu

Explanation of the On-Screen Display menu navigation and functions.

Input/Output Specification

Input Signal Connector

Pin assignments and descriptions for analog (VGA) and DVI connectors.

Factory Preset Display Modes

List of supported resolutions and corresponding horizontal/vertical frequencies.

Panel Specification

Technical specifications for the LCD panel, including features and characteristics.

Block Diagram

Main Board

Functional block diagram of the monitor's main processing board.

Power Board

Block diagram illustrating the power supply circuit for the monitor.

Schematic

Main Board

Detailed circuit diagram for the monitor's main logic board.

Power Board

Circuit diagram for the monitor's power supply adapter board.

Light Sensor Board

Schematic diagram of the light sensor circuit board.

Key Board

Circuit diagram for the monitor's control button interface board.

PCB Layout

Main Board

Physical layout of components on the main circuit board.

Power Board

Physical layout of components on the power supply board.

Light Sensor Board

Physical layout of components on the light sensor circuit board.

Key Board

Physical layout of components on the control button circuit board.

Maintainability

Equipments and Tools Requirement

List of necessary tools and equipment for servicing the monitor.

Trouble Shooting

No Power

Troubleshooting steps for issues where the monitor does not power on.

No Video (Power LED Blue)

Steps to diagnose and resolve issues with no video output when the power LED is blue.

DIM

Troubleshooting steps for image dimming, overlap, focus, or flicker issues.

Color is not optimal

Steps to resolve problems related to inaccurate or shifted color reproduction.

FOS Testing

Brightness Measurement

Procedure for measuring the maximum and minimum brightness levels of the display.

Patterns Testing

Testing procedures using various visual patterns to check for display anomalies.

Firmware and DDC Instruction

Firmware Instruction

Step-by-step guide for updating the monitor's firmware using specialized tools.

HDCP Write SOP

Procedure for writing High-bandwidth Digital Content Protection (HDCP) keys.

DDC Instruction

Instructions for programming the Display Data Channel (DDC) information.

White-Balance, Luminance Adjustment

Adjust Warm (6500K) color-temperature

Procedure to set white balance for 6500K warm color temperature using factory settings.

Adjust Normal (7300K) color-temperature

Procedure to set white balance for 7300K normal color temperature using factory settings.

Adjust Cool (9300K) color-temperature

Procedure to set white balance for 9300K cool color temperature using factory settings.

Adjust sRGB color-temperature

Procedure to set white balance for sRGB color temperature using factory settings.

Monitor Exploded View

BOM List