
•Self-serviceCRUs:TheseCRUsunplugoraresecuredbynomorethantwoscrews.Examplesof
thesetypesofCRUsincludethekeyboard,themouse,anyUSBdevice,andthepowercord.Other
self-serviceCRUsdependingonproductdesignmightincludememorymodules,adaptercards,hard
diskdrives,andopticaldrives.
•Optional-serviceCRUs:TheseCRUsareisolatedpartswithinthecomputerandareconcealedbyan
accesspanelthatistypicallysecuredbymorethantwoscrews.Oncetheaccesspanelisremoved,the
specificCRUisvisible.
NumberFRUdescription
Self-serviceCRUOptional-serviceCRU
1
PowersupplyassemblyNoYes
2
MemorymodulesYesNo
3
Opticaldrive(availableinsomemodels)
YesNo
4
FrontaudioandUSBassembly
YesNo
5
Cardreader(availableinsomemodels)
NoYes
6
FrontbezelYesNo
7
FrontWi-FiantennaNoYes
8
Systemfan
NoYes
9
HarddiskdriveNoYes
10
BatteryYesNo
11
Wi-FicardmoduleNoYes
12
Wi-FiadaptercardNoYes
13
RearWi-FiantennaYesNo
14
Systemboard
NoNo
15
MicroprocessorNoYes
16
PeripheralComponentInterconnect(PCI)card
YesNo
17
Heatsinkandfanassembly
YesNo
18
KeyboardYesNo
19
MouseYesNo
LookingupFRUinformation
FordetailedFRUinformation,suchastheFRUpartnumbersandsupportedcomputermodels,goto:
http:/www.lenovo.com/serviceparts-lookup
Locatingpartsonthesystemboard
“Locatingpartsonthesystemboard”onpage78showsthelocationsofthepartsandconnectorson
thesystemboard.
78ThinkCentreE93HardwareMaintenanceManual
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