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Tandy CM-4 User Manual

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MONITOR
CM-4
Catalog
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25-1021
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Tandy CM-4 Specifications

General IconGeneral
BrandTandy
ModelCM-4
CategoryMonitor
LanguageEnglish

Summary

SPECIFICATIONS

IMPORTANT SERVICE SAFETY PRECAUTIONS

Servicing High Voltage System and Picture Tube

Procedures for safely servicing the high voltage system and picture tube.

X-Radiation and High Voltage Limits

Information on X-ray radiation sources and high voltage limits.

Pre-Return Safety Checks

Safety checks before returning the monitor to the user.

THEORY OF OPERATION

High Voltage Shut-down System

How the shut-down circuit prevents excessive high voltage.

Power Supply System

Description of the monitor's power supply circuits and protection.

DISASSEMBLY INSTRUCTIONS

ALIGNMENT INSTRUCTIONS

High Voltage Check

Procedure for checking the high voltage output.

X-ray Protector Circuit Test

Test procedure for the X-ray protector circuit.

Color Purity Adjustment

Procedure for adjusting color purity using magnets and yoke.

Black and White Tracking Adjustment

Procedure for adjusting white balance and tracking.

Static (Center) Convergence Adjustment

Procedure for adjusting static convergence using magnets.

Dynamic Convergence Adjustment

Procedure for adjusting dynamic convergence using yoke wedges.

TROUBLESHOOTING GUIDE

No Power Troubleshooting

Steps to diagnose and resolve no power issues.

Power Circuit Activation Issues

Troubleshooting power circuit activation and related components.

Horizontal Sync Circuit Issues

Troubleshooting horizontal sync circuit problems.

No Raster Appears Troubleshooting

Diagnosing issues when no raster is displayed on the screen.

No Picture Appears Troubleshooting

Diagnosing issues when the screen is blank or shows no picture.

No Synchronization Troubleshooting

Diagnosing problems with horizontal or vertical synchronization.

Vertical Sweep Failure Troubleshooting

Diagnosing issues when the vertical sweep does not occur.

No Specific Color Troubleshooting

Diagnosing issues when no specific color is displayed.

WIRING DIAGRAM AND PARTS LOCATION

SCHEMATIC DIAGRAM

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