16-1
C H A PT E R
16
Clock Control Unit Replacement
This chapter explains the replacement procedure for the clock control unit (CLKU).
It covers the following:
■
Section 16.1, “Overview of the CLKU” on page 16-1
■
Section 16.2, “Cold Replacement” on page 16-4
Cold replacement is the only swapping method that can be used for the CLKU. For the
definition of the swapping method, see
Section 4.1, “Types of Replacement Procedures” on
16.1
Overview of the CLKU
This section provides an overview of the CLKU and describes its mounting locations.
The CLKU is mounted only in the M9000 server, and it supplies clock signals to
CPU/memory board unit (CMU) and crossbar units (XBUs). CLKUs are duplicated, but
active maintenance cannot be performed on them. For the M9000 server with the expansion
cabinet, there are cables available for connecting the clocks in the base cabinet to those in the
extension cabinet.
and
show the CKLU mounting locations in the cabinets of the
M9000 server (base cabinet) and M9000 server (with the expansion cabinet), respectively.
Summary of Contents for SPARC Enterprise M8000
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Page 15: ...Contents xv Index Index 1 ...
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Page 27: ...Chapter 1 Safety and Tools 1 5 M9000 Server Front View ...
Page 29: ...Chapter 1 Safety and Tools 1 7 Power Supply Unit PSU ...
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Page 205: ...Chapter 7 I O Unit IOU Replacement 7 13 FIGURE 7 8 Removing the IOU Front of M9000 1 1 2 3 ...
Page 227: ...Chapter 8 FAN Unit Replacement 8 11 FIGURE 8 9 Removing the FAN Unit Rear of M8000 1 2 ...
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Page 409: ...Chapter 20 Backplane Replacement 20 29 FIGURE 20 16 Removing the FANBP Rear of the M8000 ...
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Page 439: ...Chapter 23 Switch Backplane Replacement 23 7 FIGURE 23 4 Removing the SWBP Rear of the M8000 ...
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