Main Power Supply Connector (20-pin)
Pagina 1 di 2
IBM-AUSTRIA - PC-HW-Support
30 Aug 1999
Main Power Supply Connector (20-pin)
Main (ATX) Power-Supply Connector (20-pin)
This 20-pin main power supply connector is located on the system board.
On most ATX-type Power-Supplies
there is a Power-Override switch available,
(Located next to the line power cable connector - do not confuse with the VOLTAGE-SELECTOR
switch - if installed).
If the system does not power-on after pressing the power button, check first the power cable and
the Power-Override switch (must be switched to ON, if available) .
Systemboard / Powersupply - (top-side / front-end view) 20-pin ATX power-connector
(You can power on the power supply without using the on/off switch.
Use a connection (jumper) to short the BLACK and GREEN (pin-13 ground <-> pin-14 P.S.-on)
wires of the 20-pin ATX connector on power supply.)
These voltages must be checked with the power supply cabels connected to the system
board.
Pin Signal
Function
Cable
Pin Signal
Color
Function
Cable
Color
11
3.3 V
+3.3 Vdc
Orange 1
3.3 V
+3.3 Vdc
Orange
12
-12 V
-12 Vdc
Blue
2
3.3 V
+3.3 Vdc
Orange
13
COM
Ground
Black
3
COM
Ground
Black
14
PS-ON
DC Remote
Enable
Green
4
5 V
+5 Vdc
Red
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Main Power Supply Connector (20-pin)
Pagina 2 di 2
15
COM
Ground
Black
5
COM
Ground
Black
16
COM
Ground
Black
6
5 V
+5 Vdc
Red
17
COM
Ground
Black
7
COM
Ground
Black
18
-5 V
-5 Vdc (Note
1)
White
8
POK
Power Good
Gray
19
5 V
+5 Vdc
Red
9
5VSB
Standby
Voltage
Purple
20
5 V
+5 Vdc
Red
10
+12 V
+12 Vdc
Yellow
NOTE 1: -5Vdc is not needed/available on some machines.
Hard Disk Drive / Diskette - Power Connector
Sample only - BAT <-> ATX - power supply
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http://inf33-www.informatik.unibw-muenchen.de/infothek/computer/tutorial/eprmhtml/e... 4/9/2003