Removing A Dsimm - Sun Microsystems SPARCclassic Service Manual

Removing a DSIMM

The procedure for removing a DSIMM is the same regardless of the type of DSIMM.
Caution -
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the edges. Do
not touch the components themselves or any metal parts. Always wear a grounding
(wrist) strap when handling the boards. Attach the wrist strap to the metal casing of
the power supply at the rear of the unit top.
Caution -
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution -
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
To remove a DSIMM:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
"Attaching the Wrist Strap" on page 53. Be sure to leave the system unit plugged
in to an AC wall outlet to provide a proper ground path.
2. Locate the DSIMM slots on the main logic board.
See Figure 11–9.
3. Place an antistatic mat, shiny side up, next to the system unit.
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
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Printed circuit boards are made of delicate electronic components that are
The AC power cord should remain attached between the system unit and
Verify that the system power switch is in the Standby position. The green