HP Z228 Maintenance And Service Manual page 98

Designator Silk screen
P126 PAR
P152 MEDIA2
SW50 SW50 CMOS
XBT1 XBT1 BAT
XMM1 - XMM4 XMM1 - XMM4
DIMM1 - DIMM4
XU1 XU1
88 Appendix C System board designators
Component
Parallel port header
USB 3.0 Media card reader
Clear CMOS switch/push button
Battery holder
Memory slots
Primary CPU socket