Apple External Hard Drive Sc Service Manual
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Service Source
External Hard Drive SC
K
Service Source
Exploded V ie w
External Hard Drive SC
Exploded View 1
Exploded View
Cover
HDA-to-Case Cable
LED Cable Assembly
Hard Drive Mechanism
Fan Frame
Fan
SCSI Select Switch
SCSI Select Switch Cable
Power Supply
K
Service Source
T ak e Apart
External Hard Drive SC
Take Apart Cover - 1
Cover
No preliminary steps are
required before you begin
this procedure.
Cover
Note:
This Take Apart
chapter applies only to the
Apple external hard drive
series (20SC, 40SC, 80SC,
or 160SC). For Take Apart
procedures internal drives,
see the manual for the
computer that contains the
drive.
Take Apart Cover - 2
1 Locate the two holding
tabs on the rear of the
hard drive, inside the
ventilation slots.
2 Using a jeweler’s
screwdriver, press in
gently on the two
holding tabs as you push
the cover up slightly.
Take Apart Cover - 3
3 Locate the four tab holes,
two on each side of the
hard drive.
4 Starting with the rear
holes, insert the
jeweler’s screwdriver
straight into each of the
holes. Nudge the cover
upward as you release
each tab.
Note:
Prying is not
necessary and may damage
the case.
Take Apart Power Supply - 4
Power Supply
Before you begin, remove
the cover.
Power Supply
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Power Supply - 5
1 Press down on the back
of the power supply,
push back the power
supply tab, and lift the
power supply.
Take Apart Power Supply - 6
2 Disconnect the power
supply connector from
the hard drive
mechanism.
Power Supply
Note:
On some hard
Fan
Cable
drive mechanisms, the
power supply connector
is on the opposite side of
the hard drive.
3 Disconnect the fan cable.
4 Lift the power supply
free.
Power Supply
Connector
Take Apart Hard Drive Mechanism - 7
Hard Drive Mechanism
Before you begin, remove
the cover.
Hard Drive
Mechanism
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Hard Drive Mechanism - 8
1 Push back the large tab,
slide the hard drive
mechanism up, and rest
it on the edge of the case.
Tab
Hard Drive
Mechanism
Take Apart Hard Drive Mechanism - 9
2 Disconnect the power
supply.
Note:
SCSI Select
Switch Connector
On some hard
drive mechanisms, the
power supply connector
is located on the
opposite side of the hard
drive.
3 Open the end tabs (if
present) on the hard
drive data cable
connector and disconnect
Power
Supply
Connector
HDA-to-Case
Cable
Hard Drive Mechanism
the cable from the hard
drive mechanism.
Take Apart Hard Drive Mechanism - 10
4 Disconnect the SCSI
select switch connector
and lift the hard drive
mechanism out of the
case.
Note:
Skip the following
steps if you are replacing a
20 MB or a 160 MB
external hard drive. Return
these drives to Apple in
their original carriers.
Take Apart Hard Drive Mechanism - 11
Note:
Four screws hold the
5.25-inch hard drive along
the bottom edge of the
LED Cable
SCSI Select
Switch
carrier.
5 Turn the drive over and
remove the four screws
near the center of the
metal carrier. Use this
carrier to install the
service replacement
module.
6 Disconnect the LED
cable and SCSI select
switch from the hard
drive mechanism.
Edge of 3.5 Drive
Take Apart Hard Drive Mechanism - 12
Note:
Review “Carrier
Removal,” “Modifying 5.25
Drives,” or “Modifying 3.5
Drives” in Additional
Procedures before you
install the new service
replacement drive.
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