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Old 02-06-2019, 02:58 PM   #1545
recapping PCB.
kevin!'s Avatar
Join Date: Jul 2013
City & State: Gerona
My Country: Espaņa
Line Voltage: 230VAC 49Hz, 2 Ph
I'm a: Hobbyist Tech
Posts: 135
Default Re: the gutless, bloated, and fried power supply hall of shame

This PSU comes from a satellite decoder, from one day to the next, the decoder stopped turning on, and the PSU was chirping, I opened it and found this:

IC switch: DK120 (max output 12v, 1A)
photocoupler: 817c
Main capacitor: 400v 10 microfarads YZJ (LED series) (the IC manufacturer recommends 22 microfarads)
VCC capacitor (supplies VCC the IC DK120): KSJ 16V 100 microfarads
1 capacitor Y
Transformer 12v 1A TA rev. A
Secondary Output:
1 schottky diode sr3100
1 capacitor KSJ 16v 470 microfarads (bad)
1 inductor 10UH
1 capacitor 16v 220 microfarads (requires a 470 microfarad capacitor)

In the end I replaced the PSU with a better one.
It lacks a zener diode (there is no voltage stabilizer), capacitors of smaller capacity than DK recommends for good operation.
Terrible PSU.
The only thing that is good is the PFC winding.
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Gaming pc (Soon it will be replaced by a Ryzen 9):
Gigabyte RTX 2070, Corsair RM750I.

Intel Xeon X3460, 8GB DDR3, MSI ms-7316, case hp pro mt3133, liteon 300w (recapped), nvidia gt 1030, samsung spinpoint 500GB.

Last edited by kevin!; 02-06-2019 at 03:08 PM..
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