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Pin Number
Wire Color
Function
1 White Left Front Positive 2 Green Left Rear Positive 3 Violet Right Rear Positive 4 Grey Right Front Positive 5 Blue/White Amplifier Remote 6 Blue Antenna Remote 7 Red Accessory 12 Volts 8 Black Ground 9 White/Black Left Front Negative 10 Green/Black Left Rear Negative 11 Violet/Black Right Rear Negative 12 Grey/Black Right Front Negative 13 Sky Blue Telephone Mute 14 Orange/White Illumination 15 Not Used Not Used 16 Yellow Constant 12 Volts
Sony's support site shows the color codes for wiring both a 9-pin and a 16-pin harness. Click the appropriate harness to bring up the color code table.
ATX Version 1.2 - 20 wire motherboard connector
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
3.3V
3.3V
Gnd
5V
Gnd
5V
Gnd
P_OK
5VSB
12V
Oran
Oran
Blk
Red
Blk
Red
Blk
Gray
Purp
Yell
Oran
Blue
Blk
Green
Blk
Blk
Blk
White
Red
Red
3.3V
-12V
Gnd
P_ON
Gnd
Gnd
Gnd
-5V
5V
5V
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Pin 17
Pin 18
Pin 19
Pin 20
The color scheme used for the voltages in the 20 pin connector holds for the other ATX standard power supply connectors. However, brand name manufacturers often build proprietary power supplies or make up their own color coding, so I wouldn't throw out a power supply that supplies 5V where you think it should supply 3.3V. It's more likely a proprietary design than a failure.
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