B-19
Appendix B
Step 5. Installing Motherboards into Expansion Bays (continued)
Connecting the
733-525 Harness
If you need to connect a 733-525 Harness to a motherboard, refer to Figure B-17 and follow
these steps. Make sure to route the power and communication wiring on the left side of the bay.
1. Connect one end of the harness to a motherboard in an adjacent bay.
If the adjacent bay is a master controller bay, connect the harness to the P2 and P3
connectors of the master controller motherboard and continue to step 2.
If the adjacent bay is an expansion bay, connect the harness to the P2 and P3 connectors of
the motherboard installed in the leftmost slot. (If a 4100/4120-0155 SDACT or a
4100/4120-0153 CCDACT occupies the leftmost slot, connect the harness to the
motherboard in the second slot from the left.) Connect the harness as follows:
a. Insert the harness connector with the blue wire into the P2 connector. Note that
the P2 connector has eight pins. Insert the harness connector on either the top
four pins or the bottom four pins, not in the middle.
b. Insert the harness connector with the white wire into the P3 connector. Note that
the P3 connector has eight pins. Insert the harness connector on either the top
four pins or the bottom four pins, not in the middle.
Continued on next page
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