Video Simm (Vsimm); Removing The Vsimm - Sun Microsystems SPARCclassic Service Manual

Video SIMM (VSIMM)

This section describes the procedures for removing and replacing a faulty Video
SIMM. The VSIMM is an option on SPARCstation LX systems only. Complete
installation procedures can be found in Installing SPARCclassic/SPARCclassic X/
SPARCstation LX DSIMMs and VSIMMs.

Removing the VSIMM

Caution -
Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the
nonconducting 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.
To remove the VSIMM from the system unit:
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.
Caution -
The AC power cord should remain attached between the system unit and
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.
Main Logic Board and Component Replacement
113