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19.4.2 Removing a fan unit 332
19.5 Installing a Fan Unit 333
19.5.1 Installing a fan unit 333
19.5.2 Restoring the chassis 333
19.6 Restoring the System 333
19.6.1 Active/Hot maintenance 334
19.6.2 Inactive/Hot maintenance 334
19.6.3 System-stopped maintenance 334
Chapter 20 Maintaining the XSCF Interface Unit of the Crossbar Box 337
20.1 Location of the XSCF Interface Unit 337
20.2 Before Maintaining the XSCF Interface Unit 338
20.2.1 Types of maintenance 338
20.2.2 Maintenance flow 339
20.3 Enabling the Removal of the XSCF Interface Unit 339
20.4 Removing the XSCF Interface Unit 340
20.5 Installing the XSCF Interface Unit 342
20.6 Restoring the System 342
Chapter 21 Maintaining the Crossbar Backplane Unit of the Crossbar Box
343
21.1 Location of the Crossbar Backplane Unit 343
21.2 Before Maintaining the Crossbar Backplane Unit 344
21.2.1 Types of maintenance 344
21.2.2 Maintenance flow 345
21.3 Enabling the Removal of the Crossbar Backplane Unit 345
21.4 Removing the Crossbar Backplane Unit 346
21.5 Installing the Crossbar Backplane Unit 353
21.6 Restoring the System 354
Chapter 22 Maintaining the Fan Backplane of the Crossbar Box 357
22.1 Configuration of the Fan Backplane 357
22.2 Before Maintaining the Fan Backplane 358
22.2.1 Types of maintenance 359
Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual • December 2013xiv