My story starts out last October when a friend gave me a Fortron FSP200-60ATV which was "burned up". Yes it was. See attached photos.
The two transistor 5vsb circuit was dead. I made an attempt to fix it, but only succeeded in blowing out both transistors again, and the fuse. The culprit on this power supply seems to have been a zener diode which was supposed to have protected the 5vsb from going overvoltage. Instead, the zener went overcurrent, burned, shorted, then caused the rectifier in that circuit to burn. burning both the diode and the pc board. Other parts were also damaged. Due to the burn damage, I decided to use this board for spare parts.
The two transistor 5vsb circuit was dead. I made an attempt to fix it, but only succeeded in blowing out both transistors again, and the fuse. The culprit on this power supply seems to have been a zener diode which was supposed to have protected the 5vsb from going overvoltage. Instead, the zener went overcurrent, burned, shorted, then caused the rectifier in that circuit to burn. burning both the diode and the pc board. Other parts were also damaged. Due to the burn damage, I decided to use this board for spare parts.
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