Pin main power supply connection – IBM 6648 User Manual
Page 45
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