CRT TV Screen Shrinking and Expanding – How to Fix
CRT TV Screen Shrinking and Expanding – How to Fix IntrIntroduction Is your CRT TV screen shrinking and expanding ? This issue is common in older televisions and usually points to voltage instability, faulty components, or circuit failures . In this guide, we’ll cover the possible causes of CRT TV screen size fluctuations and provide step-by-step solutions to fix them. CRT TV Screen Shrinking and Expanding Common Causes of CRT TV Screen Shrinking and Expanding Before attempting a repair, it's important to understand what might be causing the issue: 1. Power Supply Voltage Fluctuations The power supply unit (PSU) of a CRT TV needs stable voltage. If the voltage varies, the CRT TV screen size may change unpredictably. Solution: Check the power supply circuit for faulty capacitors, voltage regulators, or dry solder joints . 2. Defective Horizontal Output Transistor (HOT) The HOT is responsible for maintaining the horizontal deflection ...
