TL;DR
A power supply unit is the component that converts incoming AC line voltage to the regulated DC voltages a computer, television, or appliance control system runs on. In desktop PCs it is a standardized ATX box rated in watts with an 80 PLUS efficiency tier; in appliances and TVs it is usually a switching board that feeds 5-, 12-, and 24-volt rails.
What it means
A power supply unit is the component that converts incoming AC line voltage to the regulated DC voltages a computer, television, or appliance control system runs on. In desktop PCs it is a standardized ATX box rated in watts with an 80 PLUS efficiency tier; in appliances and TVs it is usually a switching board that feeds 5-, 12-, and 24-volt rails. Bulged capacitors, no-power symptoms, and random restarts make it one of the most replaced parts in electronics repair.
Where it sits in the glossary
Power supply unit is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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