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Asus VS239H User Manual

Asus VS239H
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Service Manual ASUS VS239H
1
LCD Monitor Service Manual
Model: ASUS VS239H
D
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATION USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND
SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMENS NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCT AND SOFTWARE DESCRIBED IN IT.
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Asus VS239H Specifications

General IconGeneral
3DNo
Pixel pitch0.2655 x 0.2655 mm
Aspect ratio16:9
Response time14 ms
Display diagonal23 \
Vertical scan range50 - 75 Hz
Viewable size diagonal584 mm
Contrast ratio (dynamic)50000000:1
Display number of colors16.78 million colors
Display brightness (typical)250 cd/m²
Supported graphics resolutions1920 x 1080 (HD 1080)
HDCPYes
DVI-I ports quantity0
CertificationUL/cUL, CB, CE, ErP, FCC, CCC, BSMI, Gost-R, C-Tick, VCCI, RoHS, WEEE, Windows 7 WHQL
Product colorBlack
Market positioning-
Tilt angle range-5 - 20 °
Cable lock slot typeKensington
Panel mounting interface100 x 100 mm
Power consumption (standby)1 W
Power consumption (typical)40 W
Package weight5900 g
Cables includedAC, DVI, VGA
Sustainability certificatesENERGY STAR
Weight and Dimensions IconWeight and Dimensions
Depth (without stand)200 mm
Width (without stand)552 mm
Height (without stand)400.3 mm
Weight (without stand)3500 g

Summary

Revision History

Important Safety Notices

Safety Information

General safety guidelines and precautions for monitor setup and use.

Care and Cleaning Guidelines

Instructions for safely cleaning the monitor surface and screen.

Normal Monitor Symptoms

Describes common display behaviors considered normal operation.

Guide Conventions and Symbols

Monitor Technical Specifications

Monitor Physical Dimensions

Monitor Operation Instructions

General Operation and Controls

Basic instructions for turning the monitor on/off and locating control buttons.

Button Functions (MENU, Input, Power)

Details the function of MENU, Input Select, and Power buttons.

OSD Menu Navigation and Functions

Guide to accessing, navigating, and using the On-Screen Display (OSD) menu.

Color and Image Settings

Adjusting display settings like brightness, contrast, sharpness, and color.

System Setup and Input Selection

Configuring language, OSD, and selecting input sources (VGA, DVI, HDMI).

Input/Output Specifications

Input Signal Connectors

Pin assignments for VGA, DVI, and HDMI input connectors.

Power Supply Requirements

Details on voltage, frequency, current, and power consumption.

Factory Preset Display Modes

Supported resolutions and refresh rates for various input signals.

Block Diagrams

Main Board Block Diagram

Overview of the main board's functional blocks and interconnections.

Power Board Block Diagram

Functional overview of the power board's components and circuits.

Schematics

Main Board Schematic

Detailed circuit diagram for the monitor's main board.

Power Board Schematic

Detailed circuit diagram for the monitor's power board.

Key Board Schematic

Circuit diagram for the monitor's key control board.

PCB Layouts

Main Board PCB Layout

Visual representation of component placement on the main board.

Power Board PCB Layout

Visual representation of component placement on the power board.

Key Board PCB Layout

Visual representation of component placement on the key board.

Disassembly and Assembly Procedures

Precautionary Measures

Safety guidelines and precautions before performing disassembly or assembly.

Suggested Tools for Service

List of recommended tools for monitor service and repair tasks.

Disassembly Steps

Step-by-step guide for disassembling the monitor's stand and subsystems.

Assembly Procedure Overview

General guidance that assembly steps are the reverse of disassembly.

ISP (In-System Programming) Instructions

ISP Setup and Materials

Required hardware and software for In-System Programming (ISP).

Firmware Upgrade Process

Steps for configuring the tool and performing the firmware flashing.

Firmware Version Check

How to verify the upgraded firmware version using the factory menu.

ISP Troubleshooting

Solutions for common issues encountered during ISP mode entry.

DDC Instruction

DDC Setup and Materials

Required hardware and software for DDC writing and EDID programming.

EDID/DDC Writing Process

Steps for using the tool to load EDID files and configure parameters.

DDC Writing Troubleshooting

Steps to resolve issues when EDID data cannot be written.

Color and White Balance Adjustment

Troubleshooting Guide

No Power Issues

Flowchart to diagnose and resolve problems related to the monitor not powering on.

No Video (Power LED Blue)

Flowchart for troubleshooting situations with no video output despite power.

DIM (Image Overlap/Focus/Flicker)

Diagnosing and fixing issues related to image distortion or flickering.

Color Display Issues

Troubleshooting steps for incorrect or shifted color reproduction.

Exploded View of Monitor Components

Bill of Materials (BOM) List

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