8-4 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
4. Connect the AC power cord between the system unit and an AC wall outlet to
provide the ground path for the wrist strap.
5. Reinstall the disk drive mounting bracket.
Reinstall the disk drive mounting bracket in front of the power supply. For detailed
instructions, see Section 9.2.2 “Replacing the Disk Drive Mounting Bracket” on
page 9-19.
6. Be sure to reconnect the power supply wiring harness to the diskette drive, hard
disk drive, and main logic board.
Connect the 12-pin and 3-pin connectors from the wiring harness to the power
connector and keyboard soft power-on connector on the main logic board. Connect
the 4-pin connectors from the harness to the hard disk drive and diskette drive (if
present). Each connector is keyed to fit only one way.
7. Refer to Chapter 7 “Internal Access to perform the following procedures:
■ Detaching the wrist strap
■ Closing the system unit
■ Reconnecting system components
8. Refer to Chapter 6 “Power Off and On to turn the power on.
After turning the power back on, check for proper operation of the system unit and
the newly installed power supply. If the newly installed power supply still does not
work properly, a problem may exist in the system unit, such as a blown component
or a short circuit.
8.2 Speaker/Power LED Assembly
This section describes the removal and replacement procedures for the speaker/
power LED assembly. This assembly is mounted on the right-hand side of the
system unit bottom (see
FIGURE 8-8).
8.2.1 Removing the Speaker/Power LED Assembly
To remove the speaker/power LED assembly:
1. Prepare to work on the system as described in Chapter 6 “Power Off and On, and
in Chapter 7 “Internal Access.
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
Section 7.3 “Attaching the Wrist Strap” on page 7-3.
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