{847} How To Repair Computer ATX Power Supply - No Power On
Channel: Haseeb Electronics
Date: 2023-03-18

{847} How To Repair Computer ATX Power Supply, this computer atx psu power supply was dead. this power supply have  +5V SB standby voltage on purple wire, 5volt PSON command on green wire. when green wire is made jumper to ground, it was main secondary power section was not turning on. while testing, i found 1N4148 diode short circuit in pulse transformer, this 350 watt atx power supply is using TL494 and LM339 ics. 
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