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xii SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
16. Clock Control Unit Replacement 16–1
16.1 Overview of the CLKU 16–1
16.2 Cold Replacement 16–4
17. Crossbar Unit Replacement 17–1
17.1 Overview of XBUs 17–1
17.2 Cold Replacement 17–4
18. AC Section Replacement 18–1
18.1 Overview of ACSs 18–1
18.2 Cold Replacement 18–5
19. DDC Replacement 19–1
19.1 Overview of the DDC 19–1
19.2 Active Replacement and Hot Replacement 19–3
19.3 Cold Replacement 19–7
20. Backplane Replacement 20–1
20.1 Overview of the BP 20–1
20.2 Cold Replacement 20–1
20.2.1 M8000/M9000 BPs 20–2
20.2.2 PSU BP 20–15
20.2.3 FAN BP 20–23
21. Sensor Unit Replacement 21–1
21.1 Overview of the SNSU 21–1
21.2 Cold Replacement 21–4
22. Media Backplane Replacement 22–1
22.1 Overview of the MEDBP 22–1
22.2 Cold Replacement 22–5