IBM pSeries 7311 D10 Service Manual page 38

Model D20 I/O Backplane Locations
The following illustration of the I/O backplane identifies the primary connectors used in your subsystem.
Note: Before replacing the I/O backplane, note the position of pin 1 on the VPD module.
1 PCI-X Adapter Connector 1
2 PCI-X Adapter Connector 2
3 PCI-X Adapter Connector 3
4 PCI-X Adapter Connector 4
5 PCI-X Adapter Connector 5
6 PCI-X Adapter Connector 6
7 PCI-X Adapter Connector 7
8 Operator Panel Connector
9 RIO Bus Adapter Connector
10 Disk Drive System Power Control Network
(SPCN) Connector
22 Eserver pSeries 7311 Model D10 and Model D20 Service Guide
11 Disk Drive Power Connector
12 Cooling Blower Connector
13 VPD Module
14 Redundant Power Supply Connector
15 Primary Power Supply Connector
16 Connector J11 (Not Used)
17 Connector J14 (Not Used)
18 Connector J15 (SPCN 3)
19 Connector J16 (SPCN 4)
20 4-pin Connector, Rack Beacon Connector