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B-38 SPARC Enterprise M8000/M9000 Servers Service Manual • October 2012
B.21 Backplane
The backplane (BP) is a printed circuit board (PCB) that has connectors and PC board used
to interconnect the cabinet-mounted units. There are two types of BP for the server available:
namely, the BP_A for the M8000 and the BP_B for the M9000. The BP_A makes
connections among CMU, IOU, XSCFU and DDC_A (See next section). The BP_B makes
connections among CMU, IOU, XSCFU, CLKU and XBU.
The BP is shown in
FIGURE B-32 and FIGURE B-33.
FIGURE B-32 Backplane (BP_A)