AOC 212Va - User Manual

22" LCD Color Monitor AOC 212Va
1
Service
Service
Service
Horizontal Frequency
31.5 kHz - 80 KHz
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………….………………….......6
3.Operation Instruction…………….................……...........7
3.1.General Instructions....................................…...........7
3.2.Control Button…………….…..............……...............7
3.3.OSD Menu…………….…...........................…............8
4.Input/Output Specification............……………............11
4.1.Input Signal Connector............……………...............11
4.2.Factory Preset Display Modes.................................12
4.3.Panel Specification.....………...…………..................13
5.Block Diagram…..…...................………..…................15
5.1.Software Flow Chart……………..…………....….......15
5.2.Electrical Block Diagram…………….………..….......17
6.Schematic……………......................................19
6.1 Main Board…….....................................................19
6.2 Power Board....……..............................................23
6.3 Audio Board.............……....................................25
7.PCB Layout..………….......................................26
7.1.Main Board………..……........................................26
7.2.Power Board....……….........................................29
7.3 Audio Board...............……....................................32
7.4.Key Board……………............................................32
8.Maintainability……….......................................33
8.1.Equipments and Tools Requirement......................33
8.2.Trouble Shooting………….....................................34
9.White-Balance, Luminance adjustment…….............40
10.Monitor Exploded View……….………….…............42
11.BOM List…………..…………………………............43
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

AOC 212Va Specifications

General

Panel Type	TN
Refresh Rate	60 Hz
Response Time	5 ms
Connectivity	VGA, DVI
Aspect Ratio	16:9
Resolution	1920 x 1080

Summary

Revision List

Important Safety Notice

Safety Warnings and Precautions

Warnings on parts, modifications, laser safety, and handling precautions.

Monitor Specifications

LCD Panel and Resolution Details

Specifications for LCD panel, resolution, pixel pitch, and color display.

Physical and Environmental Characteristics

Physical dimensions, weight, operating and non-operating environmental conditions.

LCD Monitor Description

Internal Components Overview

Description of main board, power board, key board, and audio board functions.

Monitor Block Diagram

Diagram illustrating functional connections between monitor components.

Operation Instructions

Basic Operation and Controls

Instructions for turning on/off and using control buttons.

OSD Menu Navigation and Settings

Guide to OSD settings, lock function, and DDC-CI.

Function Control Illustrations

Picture Adjustments (Luminance, Color)

Controls for brightness, contrast, eco modes, gamma, and dynamic contrast ratio.

Image Setup and Color Temperature

Settings for image positioning, clock, and color temperature presets.

Input;Output Specification

Connector Pinouts

Pinout diagrams for VGA and DVI connectors with signal names.

Panel Specification

Panel Technical Details

General panel features, display characteristics, and module size.

Optical and Electrical Characteristics

Optical Performance Metrics

Color chromaticity, contrast ratio, response time, and viewing angle specifications.

Electrical Parameters (TFT-LCD & Backlight)

Electrical specs for TFT-LCD and backlight, including voltage, current, and lamp life.

Block Diagrams

Software Flow Chart

Flowchart detailing monitor operation logic and steps.

Electrical Block Diagram (Main Board)

Diagram of main board connections to components like memory and connectors.

Schematics

Main Board Schematic

Detailed circuit diagram for the main board (715G2186-1).

Power Board Schematic

Detailed circuit diagram for the power board (715G2210-1).

Audio Board Schematic

Detailed circuit diagram for the audio board (715G1566-2).

PCB Layouts

Main Board Component Layout

Physical layout of components on the main board.

Power Board Component Layout

Physical layout of components on the power board.

Audio and Key Board Layouts

Physical layouts for the audio and key boards.

Troubleshooting Guides

Main Board Troubleshooting

Troubleshooting steps for main board issues like no power.

Display Issues Troubleshooting

Troubleshooting for no picture or white screen issues.

Power;Backlight Troubleshooting

Troubleshooting steps for power supply and backlight problems.

Keypad Board Troubleshooting

Troubleshooting for unstable or non-working keypad board.

White-Balance and Luminance Adjustment

Color Temperature and Adjustment Procedures

Steps to set color temperatures (Warm, Normal, Cool, sRGB) and adjust bias/gain.

Exploded View

Monitor Assembly Diagram

Visual breakdown of monitor components for assembly and disassembly.

Bill of Materials (BOM)

Component Parts List

Comprehensive list of all parts used in the monitor assembly.