ATX power supply does not turn on - Using an oscilloscope for repair
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NOTE: If you liked the video, give it a LIKE, and if you didn't like it, give it a DISLIKE, but be polite in the comments. In this video, I show you how to repair a computer power supply (ATX). At first, the defect was in the primary (we replaced the fuse and rectifier diodes). We managed to stabilize the Standby and PSon voltage, but we were unable to obtain the remaining voltages: 12V, 5V and 3.3V. In other words, the source continued to be defective. We analyzed the CI 4943D and, initially, found it to be in good condition. Finally, when analyzing through the oscilloscope, we detected an operational failure in the C945 transistors. Just in case, we replaced the two transistors. Link to Tripod: https://bit.ly/3wfWkk6 https://www.ajudatecnica.com/ (our Blog) ATTENTION! This video is not intended for laypeople. Switching power supplies contain dangerous mains voltage. Capacitors can remain charged to dangerous voltage even after they are disconnected from power. There is a risk of electric shock and death, a risk of fire and a risk of explosion. DO NOT open, repair, modify or build electrical appliances unless you are qualified to do so. If you have no knowledge of electronics and have never studied VOLTAGE and CURRENT, then DO NOT try to replicate what is shown in this video. You assume all responsibility and risk for your actions! ATX power supply does not turn on - Using an oscilloscope to repair
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