IBM 6578, 6579, 6269, 6059, 6058, 6569, 6568 Pin main power supply connection, Pin Signal Function

20-pin main power supply connection

See “A40 and A40P system board layout” on page 67 for connector locations.

Attention

These voltages must be checked with the power supply cables connected to the system board.

Pin	Signal	Function
1	3.3 V	+3.3 V dc
2	3.3 V	+3.3 V dc
3	COM	Ground
4	5 V	+5 V dc
5	COM	Ground
6	5 V	+5 V dc
7	COM	Ground
8	POK	Power Good
9	5VSB	Standby Voltage
10	12 V	+12 V dc
11	3.3 V	+3.3 V dc
12	-12 V	-12 V dc
13	COM	Ground
14	PS-ON	DC Remote Enable
15	COM	Ground
16	COM	Ground
17	COM	Ground
18	No voltage	Not used
19	5 V	+5 V dc
20	5 V	+5 V dc

If the voltages are not correct, and the power cord is good, replace the power supply.

Chapter 2. Types 6568/6569/6648/6649 31