This chapter lists:
Caution -
Caution -
Protect yourself and the equipment by observing the following precautions.
Table 1-1 Safety Precautions
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Item Problem Precaution ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ac power cord ESD (Electrostatic The power cord provides a ground path for the cabinet. Do not unplug the
discharge) cord, even if the power is turned off.
Electric shock Turn the cabinet circuit breaker OFF before opening the cabinet for service.
ESD mat and ESD Use a cushioned, antistatic mat and a grounding strap for these procedures.
wrist or foot strap
System boards ESD Handle a system board by the edges only.
Breakage Parts on a board may break if the board is flexed. Keep the board vertical
when out of the card cage. Place the board on a cushioned mat for service.
Springfingers Injury Springfingers have sharp edges, so handle springfinger-equipped screens
and boards carefully.
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On the SPARCcenter 2000 board (which has two buses), always install eight SIMMs at a time, four in group x (where x = 0 or 1) on bus 0 and four in the same group number on bus 1. On SPARCserver 1000 boards, install SIMMs in groups of four.
Appendix A, "SIMM Reference" lists rules for choosing SIMM locations that optimize memory performance.
When the system is started, the Power-On Self-Test (POST) will display SIMM or NVSIMM failures on the terminal. The following chapters list SIMM locations for specific board types.
To run specific tests for memory devices, use the OpenBoot PROM (OBP) diagnostic menu. See the system service manual or the OpenBoot Command Reference for instructions on running the diagnostic menu.
Note - These devices were designed specifically for the SPARCserver 1000 and SPARCcenter 2000 systems, and are not interchangeable with other SIMMs.
Do not mix SIMMs of different capacities. The 8 Mbyte and 32 Mbyte SIMMs may be almost identical when made by the same manufacturer, so do not rely on physical appearances. To verify the suitability of a replacement module, refer to Table 1-2 and Figure 1-1.
Table 1-2 Identifying Memory Module Variations
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Capacity Type Markings Part Number Outline in Figure 1-1 -------------------------------------------------------------------------------------------------
8 Mbyte 20-pin DRAMs A SIMM may be variously marked 501-1817 A or B
MH1M72A, MH1M72BJ-8, ZA3080
(in etch), or Z124SUN72
32 Mbyte 24-pin DRAMs A SIMM may be variously marked 501-2196 A or B
MH4M72J-8, Za3085 (in etch), or
Z496SUN72
1Mbyte Battery-backed An NVSIMM may be marked 501-2197 C
NVSIMM MH12872SN-70H
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Figure 1-1 SIMM and NVSIMM Types
