System Board and Riser Board Reference Designators
Designator
SW51
SW52
U7
U15
U100
XBT1
XMM1
XMM2 - XMM5
XU1
XU2
XU15
XU100
Y1
Y2
Y3
Y4
Y5
E–4
Component (Continued)
Power button switch
System reset switch
64-bit bridge chip for Workstation group
ROM chip
Security chip
Battery socket
Memory slot. DIMM1 or RIMM1 populated and tested
Following memory slots
Primary processor socket Secondary processor socket
ROM socket
ROM socket
Security chip socket
Primary (TH) system clock crystal
Secondary (SMT) system clock crystal
Primary (YTH) NIC clock crystal
Secondary (SMT) NIC clock crystal
RTC clock crystal/tie-down
Service and Technical Reference Guide, xw3100