Envision P2271WL - User Manual

21.5" LCD Monitor Envision P2271WL
1
Service
Service
Service
Horizontal Frequency
31-80 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……………………………......5
3.Operation Instruction…………...............……..............6
3.1.General Instructions...........................…...................6
3.2.Control Button…………….…..............……...............6
3.3.OSD Menu…………….…...........................…...........7
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…….....................………….................16
5.1.Main Board…….…………...………………....….......16
5.2.Power Board……………..….…………...….......17
6.Schematic……………........................................18
6.1.Main Board………...........................................18
6.2.Adapter Board...……......................................22
6.3.Converter Board...……...................................23
6.4.Key Board...…….............................................25
7.PCB Layout..………….......................................26
7.1.Main Board………...........................................26
7.2.Adapter Board……......................................29
7.3.Converter Board….....................................32
7.4.Key Board…………….....................................33
8.Maintainability……….........................................34
8.1.Equipments and Tools Requirement...............34
8.2.Trouble Shooting…………..............................35
9.White-Balance, Luminance Adjustment.............39
10.Monitor Exploded View………..…….…...........41
11.BOM List…………………………………............43
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Envision P2271WL Specifications

General

Brand	Envision
Model	P2271WL
Category	Monitor
Language	English

Summary

Revision List

Important Safety Notice

Monitor Specifications

LCD Monitor Description

Operating Instructions

General Instructions

Basic monitor operation and power on/off procedures.

Control Buttons

Details the function of each control button on the monitor.

OSD Menu Navigation

Navigating and using the On-Screen Display menu.

Function Control Illustration

Explains controls like Luminance, Eco mode, Gamma, and DCR.

Image Setup Options

Adjustments for picture settings like clock, phase, color, and boost.

OSD Setup and Extra Options

OSD settings, input selection, auto config, and reset options.

LED Indicators

Explains the status and color of the monitor's LED indicators.

Input;Output Specification

Input Signal Connector

Details the pin assignments for analog and DVI connectors.

Factory Preset Display Modes

Lists supported display resolutions and their frequencies.

Panel Specification

General Features

Describes the physical and general features of the LCD panel.

Display Characteristics

Technical specifications related to panel display performance.

Electrical Characteristics

Electrical properties of the TFT LCD and backlight.

Optical Characteristics

Optical properties like color, contrast, response time, and viewing angle.

Block Diagram

Main Board Block Diagram

Illustrates the functional blocks of the main PCB.

Power Board Block Diagrams

Adapter Board Diagram

Shows the power adapter's circuitry.

Converter Board Diagram

Depicts the converter board's functional blocks.

Schematics

Main Board Schematic

Detailed electronic circuit diagram of the main board.

Adapter Board Schematic

Detailed electronic circuit diagram of the adapter board.

Converter Board Schematic

Detailed electronic circuit diagram of the converter board.

Key Board Schematic

Circuit diagram and components of the key control board.

PCB Layout

Main Board PCB Layout

Visual representation of the main board's component placement.

Adapter Board PCB Layout

Visual representation of the adapter board's component placement.

Converter Board PCB Layout

Visual representation of the converter board's component placement.

Key Board PCB Layout

Visual representation of the key board's component placement.

Maintainability

Equipments and Tools Requirement

Lists necessary tools for service and maintenance.

Trouble Shooting

No Power Issues

Troubleshooting steps for when the monitor does not power on.

No Video Issues

Troubleshooting steps for no video signal with power LED on.

DIM Display Anomalies

Troubleshooting steps for display dimness or image anomalies.

Color Quality Issues

Troubleshooting steps for incorrect color display or shifts.

White-Balance, Luminance Adjustment

Monitor Exploded View

BOM List