Sun Microsystems SPARC classic X, Service Manual

Page: 111 / 198

Chapter 9 Storage Devices 9-21
■
Reconnecting system components
6. Refer to Chapter 6 “Power Off and On to turn the power on.
9.3 Diskette Drive
The diskette drive is in the unit top at the front right side (see
FIGURE 9-12
). A 34-pin
data cable and a 4-pin power cable connect to the rear of the drive. Four Phillips-
head screws attach the diskette drive to the mounting bracket. The drive and the
mounting bracket (described previously) are secured to the chassis by a single
captive Phillips-head screw at the center rear of the bracket. See
FIGURE 9-14
and
FIGURE 9-16
.
Caution – The hard disk drive and diskette drive contain electronic components
that are extremely sensitive to static electricity. Ordinary amounts of static from your
clothes or work environment can destroy the components. Do not touch the
components themselves or any metal parts. Always wear a grounding strap when
handling these drives. Attach the strap to your wrist and to the metal casing of the
power supply.
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.
Caution –
Verify that the system power switch is in the Standby position. The green
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.