Sony Trinitron GDM-C520

Questions and Answers

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Brittany BeardAug 16, 2025
What to do if the picture on my Sony Trinitron GDM-C520 Monitor flickers?
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  greendebraAug 16, 2025
  If the picture on your Sony Monitor flickers, bounces, oscillates, or is scrambled, try these steps: Eliminate potential sources of electric or magnetic fields. Move the monitor away from power lines or use a magnetic shield. Try a different AC outlet on a different circuit. Rotate the monitor 90 degrees. Check your graphics board manual for the correct monitor setting. Confirm your graphics mode and input signal frequency are supported. Adjust the computer’s refresh rate for the best picture.
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Edward CollinsAug 18, 2025
Why is there no picture on my Sony Trinitron GDM-C520 Monitor?
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  Jason FergusonAug 19, 2025
  If there's no picture on your Sony Monitor, ensure the power cord is properly connected and the power switch is in the “on” position. Also, check that the video signal cable is correctly connected and firmly seated. Verify the INPUT switch setting is correct, the HD15 connector pins aren’t bent, and the computer’s power is on. Your computer might be in power saving mode, so press a key or move the mouse. Ensure the graphic board is properly seated. You can also try the Self-diagnosis function.
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James BeardAug 21, 2025
Why is the color not uniform on my Sony Trinitron GDM-C520 Monitor?
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  Whitney WarrenAug 21, 2025
  If the color on your Sony Monitor isn't uniform, it could be due to equipment generating a magnetic field (like a speaker) placed near the monitor, or if the monitor's direction has changed. Try degaussing the monitor. You can also try adjusting the landing.
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Jason RossAug 25, 2025
How to fix a fuzzy picture on my Sony Trinitron GDM-C520?
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  ojonesAug 26, 2025
  To fix a fuzzy picture on your Sony Monitor, try adjusting the contrast, brightness, and PICTURE EFFECT. You can also try degaussing the monitor. Additionally, adjust the degree of moire cancellation until the moire is minimal, or set CANCEL MOIRE to OFF.
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James SmithAug 28, 2025
What causes ghosting on a Sony Trinitron GDM-C520 Monitor and how to fix it?
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  Mckenzie FreemanAug 28, 2025
  If you are experiencing ghosting on your Sony Monitor, eliminate the use of video cable extensions and/or video switch boxes. Also, check that all plugs are firmly seated in their sockets.
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Victoria HansenAug 30, 2025
How do I center the picture on my Sony Trinitron GDM-C520 Monitor?
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  Linda HendricksAug 30, 2025
  To center the picture on your Sony Monitor, perform the Auto Size Center function. You can also manually adjust the size or centering. Note that with some input signals or graphics boards, the periphery of the screen might not be fully utilized. Also, just after turning the power switch on, the size/center may take a while to adjust properly.
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Allen CamachoSep 3, 2025
How to fix wavy patterns on Sony Trinitron GDM-C520 Monitor?
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  Elizabeth WallaceSep 3, 2025
  If a wavy or elliptical pattern (moire) is visible on your Sony Monitor, adjust the degree of moire cancellation until it's minimal. Alternatively, try changing your desktop pattern.
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Gary WoodSep 6, 2025
What to do if edges of the image are curved on Sony Trinitron GDM-C520?
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  Dr. Lindsey BrownSep 6, 2025
  If the edges of the image are curved on your Sony Monitor, adjust the geometry.
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Kylie LinSep 8, 2025
Why do my Sony Trinitron GDM-C520 buttons not work?
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  Ronald AndersonSep 8, 2025
  If the buttons on your Sony Monitor do not operate, check if the control lock is set to ON; if so, set it to OFF.
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keith47Sep 12, 2025
Why does my Sony Monitor hum when turned on?
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  millercarrieSep 12, 2025
  The hum you hear right after turning on your Sony Monitor is the sound of the auto-degauss cycle. When the power is turned on, the monitor automatically degausses for a few seconds. If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. A humming noise may be heard, but this is not a malfunction.

Summary

Owners Record

Regulatory Information

Precautions

Warning on power connections

Provides warnings regarding the use of power cords and static discharge.

Notes on cleaning the screens surface

Details on how to clean the monitor screen without damaging the anti-reflective coating.

Installation

Guidance on where to install the monitor and where not to install it.

Use of the tilt-swivel

Instructions on how to adjust the monitor's tilt and swivel angles.

Setup

Connecting your monitor to your computer

Instructions for connecting the monitor to IBM PC/AT and Macintosh computers.

Turning on the monitor and computer

Steps for powering on the monitor and the computer.

Adjustments; Technical Features

Navigating the menu

Guide to navigating the on-screen menu for adjustments.

Adjusting the picture quality

Details on selecting picture modes for different viewing scenarios.

Adjusting the color of the picture

Instructions for adjusting color temperature and bias/gain settings.

Power saving function

Information on the monitor's power saving modes and indicators.

Troubleshooting

No picture

Steps to resolve issues when the monitor displays no picture.

Picture flickers, bounces, oscillates, or is scrambled

Guidance on troubleshooting display anomalies like flickering or scrambling.

On-screen messages

Explanation of various messages that may appear on the monitor screen.

If thin lines appear on the screen (damper wires)

Explanation of thin lines on the screen and their cause.

Self-diagnosis function

How to use the monitor's self-diagnosis feature to identify problems.

Appendix

Preset mode timing table

Table listing supported resolution and frequency modes.

Contacting Sony

Information on how to contact Sony for support.

TCO99 Eco-document

Why do we have environmentally labelled computers?

Explanation of the importance of environmental labelling for computers.

What does labelling involve?

Details on the requirements and scope of the TCO'99 labelling scheme.

Environmental requirements

Summary of environmental criteria met by TCO'99 approved products.

Artisan Color Reference System Quick Setup Guide

Connecting the display and computer

Instructions for connecting the Artisan™ display and computer.

Connecting the Artisan Sensor

Steps to connect the Artisan™ Color Reference Sensor to the computer.

Mounting the Display Hood

Guidance on attaching the display hood for ambient light reduction.

Notes on Mounting the Display Hood

Important notes regarding the adhesion and adjustment of the display hood.

Installing the Artisan Software

Precautions

Installation

Precautions related to connecting the Artisan™ Color Reference System.

Calibration

Precautions to take before and during the calibration process.

Maintenance

Cleaning the Artisan Sensor

Instructions for cleaning the Artisan™ Sensor and its window.

Transportation

Guidelines for transporting the Artisan™ Color Reference System components.

Operation

Overview

Introduction to the chapter covering system operations.

Calibrating your System

Steps for calibrating the display to standard or custom colorspaces.

Notes on Maintaining a Calibrated System

Important notes on keeping the display calibrated and managing calibration data.

Operation

Expert Mode-Creating a Custom Target Colorspace

Guide to creating custom target colorspaces using Expert Mode.

Tips for Calibration and Use of this System

Advice on lighting, environment, and general usage for calibration.

Other Information

Overview

Introduction to troubleshooting, glossary, and specifications.

Troubleshooting

Problem-solving guide for calibration and display issues.

Contacting Sony

Information on how to get further assistance from Sony.

Glossary

Definitions of technical terms used in the manual.

Specifications

Technical specifications for the Artisan™ Color Reference Sensor and Signal Cable.

Sony Trinitron GDM-C520 Specifications

General

Display Type	CRT
Screen Size	21 inches
Dot Pitch	0.24 mm
Maximum Resolution	1600 x 1200
Refresh Rate	85 Hz
Aspect Ratio	4:3
Horizontal Refresh Rate	30 - 96 kHz
Vertical Refresh Rate	50 - 160 Hz
Input Connectors	VGA (D-Sub)