Lenovo LXH-GJ17L3 User Manual

17” LCD Color Monitor Lenovo LXH-GJ17L3
1
Service
Service
Service
Horizontal Frequency
30 kHz -80kHz
TABLE OF CONTENTS
Description Page Description Page
N
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.Adjusting the Picture...........................…............8
4.Input/Output Specification............……………............10
4.1.Input Signal Connector............………….................10
4.2.Factory Preset Display Modes.........................10
4.3.Panel Specification.....……...……………..................11
5.Block Diagram………...................………….................14
5.1.Software Flow Chart……………………..……...........14
5.2.Electrical Block Dia
g
ram…………………..….......16
6.Schematic…………………...................................…18
6.1.Main Board.................................................18
6.2.Power Board....……….…....................................23
7.PCB Layout..……………….......................................26
7.1.Main Board……………........................................26
7.2.Power Board…......................................................28
7.3 Adapter Board……………………………...………..30
7.3.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………….…………….........41
11.BOM List…...........................................................42
12.Different Parts List….………………..………………53
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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Lenovo LXH-GJ17L3 Specifications

General

Brand	Lenovo
Model	LXH-GJ17L3
Category	Monitor
Language	English

Summary

Safety Precautions and Notices

General Service Safety

Essential safety guidelines for servicing electronic equipment, including high voltage precautions.

Revision History

List of revisions made to the service manual, including dates and changes.

Laser Radiation Warning

Dangers and precautions related to laser radiation exposure and optical instruments.

Monitor Technical Specifications

General Display Characteristics

Details on LCD panel, input, power, and environmental specifications.

Optical and Electrical Properties

Specifications for panel, optical performance, and CCFL inverter parameters.

Back Light Unit Specifications

Electrical parameters for the back light unit, including voltage and current.

System Architecture and Schematics

Block Diagrams

Overview of monitor's functional blocks and software flow.

Electrical Block Diagrams

Detailed electrical block diagrams for main and power boards.

Schematic Diagrams

Detailed circuit schematics for main, power, input, and MPU boards.

PCB Layouts and Component Identification

Main Board PCB Layout

Component placement and copper trace layout for the main board.

Power Board PCB Layout

Component placement and copper trace layout for the power board.

Adapter and Key Board Layouts

Component placement diagrams for adapter and key boards.

Maintenance and Troubleshooting Guide

Required Tools and Equipment

List of essential tools and equipment for servicing the monitor.

Troubleshooting Flowcharts

Diagnostic flowcharts for common issues on main, power, and keypad boards.

White-Balance and Luminance Calibration

Calibration Setup and Procedure

Steps for setting up the Chroma-7120 and performing white-balance and luminance adjustments.

Parts Information

Monitor Exploded View

Visual representation of monitor components for identification.

Bill of Materials (BOM)

Detailed list of parts and their part numbers for various models.

Different Parts Lists

Comparison of parts lists across different monitor model variations.