2 SPARCstation 20 Service Manual • July 1996
FIGURE 1-1 SPARCstation 20 System
Subassemblies, Boards, and Components
The SPARCstation 20 system contains the following subassemblies, boards, and
components (see
FIGURE 1-2):
â– System board
â– SIMMs
â– DSIMMs (eight maximum)
â– VSIMMs (two maximum)
â– Non-volatile SIMM (NVSIMM) (one)
â– SBus card (four maximum)
â– MBus module (two maximum)
â– Hard disk drive, 3.5-inch (88.0-mm), single connector (two maximum)
â– SunCD 2Plus drive or SunCD 4 drive (optional)
â– Diskette drive (3.5-inch) (optional)
â– Power supply (150 watt, two-fan)