Sun Microsystems SPARCclassic Service Manual page 122

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 -
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.
2. Place the antistatic mat, shiny side up, next to the system unit.
The mat is supplied with the replacement SBus card.
3. Detach any external cables connected to the faulty SBus card (if applicable).
4. Detach any internal cables leading from the SBus card to the main logic board
(if applicable).
Detach the cables from their connectors on the main logic board.
5. Remove the faulty SBus card.
Place your index fingers or thumbs beneath the corners of the SBus card where it
plugs into its slot. Lift up the card to release it from the slot (see Figure 11–1).
Caution -
retainer can cause it to break.
6. Place the SBus card on an antistatic mat.
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
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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
The plastic SBus card retainer is not a handle. Pulling on the SBus card