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Power Supply Model HP-150SS / PS-5231. The plug is an ATX 20 pin plug, but it's incompatible with ATX standards (different pinout, no 3.3V)

 

Pin
Number
Pin
Name
Description
1 +5V  
2 GND  
3 +5V  
4 GND  
5 PG +5V when power good
6 +5V STB Stand-by power
7 +12V  
8 -12V  
9 GND  
10 GND  
11 PWR_ON Connect to ground to power on
12 GND  
13 GND  
14 GND  
15 -5V  
16 +5V  
17 +5V  
18 +5V  
19 TFSC Thermal Fan Speed Control.
20 +5V  

Cable colors may differ between power supplies, even within the same revision!

TFSC - Mainboard puts 0.7 - 1.4V there to control voltage supplied to power supply's fan (fan voltage increases when TFSC increases).

Almost the same with DELL ATX power supply pinout

20 pin MiniFit Jr 5557-20 female (MOLEX 39-01-2200) схематический вид разъема
Разъем 20 pin MiniFit Jr 5557-20 female (MOLEX 39-01-2200)
at the power supply
20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202) схематический вид разъема
Разъем 20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202)
at the Mainboard
На эту распиновку есть 2 отзыв(а): 1 положительных и 1 отрицательных.

Эта распиновка
Источник(и) этой и дополнительной информации: My measurements
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