Lenovo L222 Wide User Manual

22" LCD Color Monitor Lenovo L222 Wide
1
Service
Service
Service
Horizontal Frequency
30-83 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............……………............10
4.1. Input Signal Connector............………….................10
4.2. Factory Preset Display Modes..........................11
43. Panel Specification.....………………..................11
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. Key Board.................................................25
7. PCB Layout..…………......................................26
7.1. Main Board………........................................26
7.2. Power Board....……....................................27
7.2. Key Board……………....................................28
8. Maintainability……….......................................29
8.1. Equipments and Tools Requirement..............29
8.2. Trouble Shooting………….............................30
9. White-Balance, Luminance adjustment............36
10. Monitor Explode View…………………..........38
11. BOM List………………………………............39
12. Different Part List………………………............53
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
http://www.wjel.net

Lenovo L222 Wide Specifications

General

Screen Size	22 inches
Resolution	1680 x 1050
Aspect Ratio	16:10
Panel Type	TN
Brightness	250 cd/m²
Contrast Ratio	1000:1
Response Time	5 ms
Connectivity	VGA, DVI

Summary

Monitor Specifications

LCD Monitor Description

Operating Instructions

General Operating Instructions

Basic steps for connecting and powering on the monitor.

Control Button Functions

Details the function of each control button on the monitor.

OSD Menu Navigation

Explains how to navigate and use the On-Screen Display menu.

Input/Output Specifications

Input Signal Connectors

Pin assignments for Analog and DVI input connectors.

Factory Preset Display Modes

Lists supported display resolutions and their corresponding refresh rates.

Panel Specifications

General features and electrical characteristics of the LCD panel.

Block Diagrams

Software Flow Chart

Diagram illustrating the monitor's software operational flow.

Electrical Block Diagram

Diagram detailing the electrical connections between main board components.

Schematics

Main Board Schematic

Schematic diagram for the main control board.

Power Board Schematic

Schematic diagram for the power supply and inverter board.

Key Board Schematic

Schematic diagram for the button control board.

PCB Layouts

Main Board PCB Layout

Visual layout of components on the main printed circuit board.

Power Board PCB Layout

Visual layout of components on the power supply printed circuit board.

Key Board PCB Layout

Visual layout of components on the key control printed circuit board.

Maintainability and Tools

Required Service Tools and Equipment

Lists essential tools and equipment for servicing the monitor.

Troubleshooting Guide

Main Board Troubleshooting

Troubleshooting steps for common issues related to the main board.

Power/Inverter Board Troubleshooting

Troubleshooting steps for common issues related to the power/inverter board.

Keypad Board Troubleshooting

Troubleshooting steps for issues with the keypad and OSD.

White Balance and Luminance Adjustment

Exploded View of Monitor

Bill of Materials (BOM)

Differential Part List