Sun Microsystems SPARCstation 20, Service Manual

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162 SPARCstation 20 Service Manual • July 1996
Caution – Do not disconnect the power cord from the system unit back panel
connector. Be sure the power cord is connected to a grounded wall receptacle and
that the system unit power switch is set to standby. Verify that the green LED at the
chassis front is off.
FIGURE 11-25
SIMM Slot Locations
1. Remove power from the system.
See “Removing Power from the System” on page 45.
2. Remove the cover and attach the wrist strap.
See Chapter 7.
Caution –
Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an ESD-protected mat. Store ESD-sensitive
components in antistatic bags before placing it on any surface.
3. Place an antistatic surface next to the system.
Caution –
Hot surface. Avoid contact. Surfaces are hot and may cause personal
injury if touched.
SIMMs location
J0201 bank 0
J0202 bank 2
J0203 bank 5
J0301 bank 3
VSIMM 0, J0407
VSIMM 1, J0406
*J0304 can be used for VSIMMs or DSIMMs.,
**J0305 can be used for DSIMMs,. VSIMM,
J0302 bank 6
J0303 bank 1
J0304* bank 7
J0305** bank 4
or a NVSIMM.