Removing The Power Supply - Sun Microsystems SPARCclassic Service Manual

Removing the Power Supply

To remove the power supply:
1. Prepare to work on the system as described in Chapter 7.
Halt the system and verify that the power LED is not lit and that 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.
2. Make sure that the system unit's power is in the Standby position.
Make sure that the green LED at the front of the chassis is not lit and that the fan
in the power supply is not running.
3. Remove the disk drive mounting bracket.
The disk drive mounting bracket must be removed before the power supply can
be lifted out of the system unit. Follow the directions in "Removing the Disk
Drive Mounting Bracket" on page 91 for removing the disk drive mounting
bracket (ignore step 1 and the Caution that follows it).
4. Make sure that you disconnected the power supply wiring harness from the
diskette drive, hard disk drive, and main logic board.
5. Disconnect the system unit AC power cord and detach the wrist strap from the
power supply.
For this procedure, the power cord must not bee connected between the system
unit and the AC wall outlet.
Caution -
and that the power switch is in the Standby position before you remove, replace, or
install the power supply. Failure to take this precaution may result in severe
electrical shock.
6. Remove the power supply (see Figure 8–1).
Grasp the power supply firmly and slide it about 0.25 inch toward the front of
the unit to disengage it from the four hooks in the bottom of the system unit. Lift
the power supply straight up and out. If the power supply does not lift easily, be
sure that it has cleared the hooks.
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
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Make sure that the system unit is unplugged from the AC power outlet