14.2.2 Maintenanceflow 267
14.3 Enablingthe Removalof thePSU BackplaneUnit 267
14.3.1 Active/Coldmaintenance 268
14.3.2 Inactive/Coldmaintenance 269
14.3.3 System-stopped maintenance 269
14.4 Removingthe PSUBackplane Unit 270
14.4.1 Accessing thePSU backplaneunit 271
14.4.2 Removingthe PSUbackplane unit 273
14.5 Installingthe PSUBackplane Unit 274
14.5.1 Installingthe PSUbackplane unit 274
14.5.2 Restoringthe chassis 275
14.6 Restoringthe System 276
14.6.1 Active/Coldmaintenance 276
14.6.2 Inactive/Coldmaintenance 277
14.6.3 System-stopped maintenance 278
Chapter 15 Maintaining the Operation Panel 281
15.1 Locationof theOperation Panel 281
15.2 BeforeMaintaining theOperation Panel 282
15.2.1 Types ofmaintenance 282
15.2.2 Maintenanceflow 283
15.2.3 Precautions forreplacement 283
15.3 Enablingthe Removalof theOperation Panel 283
15.3.1 Active/Coldmaintenance 284
15.3.2 Inactive/Coldmaintenance 285
15.3.3 System-stopped maintenance 285
15.4 Removing theOperation Panel 286
15.4.1 Accessing theoperation panel 287
15.4.2 Removing theoperation panel 289
15.5 Installingthe OperationPanel 290
15.5.1 Installingthe operationpanel 290
15.5.2 Restoringthe chassis 291
Contents xi