viii  Contents
Dual Bus 4-Slot HSC Expansion I/O Card (K570/K580 only)........................................  7-25
HP-HSC I/O Card.............................................................................................................  7-26
HP-PB I/O Card ...............................................................................................................  7-27
Power Supply (all models except HP3000/979KS, HP9000/K250/K260/K450/460 and 
HP VISUALIZE Workstation models) ............................................................................  7-28
Power Supply (HP3000/979KS, HP9000/Kx50/Kx60/Kx70/Kx80, 
and HP VISUALIZE Workstation Models).....................................................................  7-29
Power Supply Fan Assembly ...........................................................................................  7-31
Fan Tray ...........................................................................................................................  7-32
System Board ...................................................................................................................  7-33
HP 9000/K100............................................................................................................... 7-33
HP 3000/9x9KS and HP 9000/K2x0/K4x0/Kx70......................................................... 7-35
HP-PB I/O Card Cage and Card Cage Power Supply
(HP3000 969/979/989 and HP9000 K3xx/K4xx/K5xx)..................................................  7-39
I/O Card Removal.......................................................................................................... 7-39
HP-PB I/O Card Cage Removal .................................................................................... 7-40
Power Supply Removal ................................................................................................. 7-41
SPCM Card Removal .................................................................................................... 7-41
HP-PB Card Cage Backplane Removal......................................................................... 7-42
Rack-Mount Cabinet Procedures .....................................................................................  7-43
Cabinet Removal and Replacement Procedures...............................................................  7-46
Rear Door.......................................................................................................................7-46
Top Cap .........................................................................................................................7-46
Side Cover ..................................................................................................................... 7-46
Forehead Assembly ....................................................................................................... 7-47
Base Cover..................................................................................................................... 7-47
Rear Door Hinge............................................................................................................ 7-48
Rail Assembly................................................................................................................ 7-48
Fan Assembly ................................................................................................................ 7-48
Fan ................................................................................................................................. 7-49
PDU ............................................................................................................................... 7-50
Cabinet Leveler or Caster.............................................................................................. 7-51
Magnetic Door Catch..................................................................................................... 7-51
Door Bumper ................................................................................................................. 7-52
8 — SCSI Peripherals and I/O Information
Introduction........................................................................................................................  8-1
Configuration .....................................................................................................................  8-2
SCSI Cables.....................................................................................................................8-3
Cable Characteristics ....................................................................................................... 8-3
Voltages / Current....................................................................................................... 8-3
Termination/Term Power................................................................................................. 8-6
Termination Characteristics and Power........................................................................... 8-6
Normal Operation...............................................................................................................  8-6
Common Problems.............................................................................................................  8-7
Cable and Terminator Part Numbers..................................................................................  8-7