Sun Microsystems SPARC classic Service Manual page 121

Visually identify each CRU by looking at the appropriate system board layout
illustration from
FIGURE 10-1
bottom illustration in
certain components of the MLB.
Acronyms for Components of the Main Logic Board
TABLE 10-2
Acronym/Abbreviation
NVRAM
PROM
PTC
DRAM
DSIMM
VSIMM
AUI
LED
ISDN
The SPARCclassic/SPARCclassic X/SPARCstation LX system board CRUs are listed
below.
Unit bottom
DSIMMs
VSIMM
SBus cards
Speaker/power LED assembly
Main logic board
NVRAM
System I/O board
Internal cables
Diskette drive data cable (Not applicable to SPARCclassic X terminal)
Hard disk drive data cable (Not applicable to SPARCclassic X terminal)
Note – As noted in the part labels shown in
applicable to the SPARCclassic X terminal.
, , or
FIGURE 10-2
.
FIGURE 10-4 TABLE 10-2
Full Expression
Nonvolatile Random Access Memory
Programmable Read-Only Memory
Positive Temperature Coefficient
Dynamic Random Access Memory
Dynamic Single In-line Memory Module
Video Single In-line Memory Module
Attachment Unit Interface (Ethernet adapter cable)
Light-Emitting Diode
Integrated Services Digital Network
, and by looking at the unit
FIGURE 10-3
lists acronyms and abbreviations for
, some items are not
FIGURE 10-4
Chapter 10 System Board Overview 10-7