DEC DECpc 433 - Page 9

Contents
3 System Box FRU Replacement
Introduction ........................................................................................... 3-1
System Box FR Us ................................................................................. 3-1
Before You Begin .................................................................................. 3-3
Outside
Cover ....................................................................................... 3-4
Chasnis Inner Cover ............................................................................. 3-9
2.5-lnc:h Hard Disk Drive .................................................................... 3-13
3.5-lnch Mass Storage Device ............................................................ 3-16
System Battery .................................................................................... 3-23
Intelligent Graphics Controller ............................................................. 3-25
External Cache.................................... .. .. . . . . .. .. .. . . .. .. .. .. . .. . . .. . .. .. ....... 3-29
Power Supply . .......... ...... ..... ... ..... . .. ....... .. ....... .... ... .. .. .. . .... 3-31
SIMMS ................................................................................... 3-34
System Board ................................................................................. 3-37
4 SCSI Expansion Box FRU Replacement
Introduction ........................................................................................... 4-1
SCSI Expansion Box F RUs ................................................................... 4-1
Before You Begin .................................................................................. 4-2
Cover .................................................................................................... 4-3
Removing
SCSI Devices (5.25-lnch Mounting Trays) .......................... 4-7
Removing SCSI Devices (3.5-lnch Mounting Tray) ......................... 4-12
Power Supply ..................................................................................... 4- 16
A
,,.. .,..,,. ..
rower Lonsumpuon
Introduction ....................................................................................... A- i
Power Requirements .......................................................................... A-1
System Board Current Requirements ................................................. A-2
ii
DEC pc 433 Workstation Service Manual