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K Service Source




External Hard Drive SC
K Service Source




Exploded View
External Hard Drive SC
Exploded View 1


Exploded View
Cover




HDA-to-Case Cable


Fan Frame
LED Cable Assembly
Fan
SCSI Select Switch


SCSI Select Switch Cable




Power Supply
Hard Drive Mechanism
K Service Source




Take 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.

Caution: Review the ESD
Power Supply precautions in Bulletins/
Safety.
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 drive mechanisms, the
Cable 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.

Caution: Review the ESD
precautions in Bulletins/
Safety.


Hard Drive
Mechanism
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: On some hard
SCSI Select
drive mechanisms, the
Switch Connector
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 the cable from the hard
Supply drive mechanism.
Connector
HDA-to-Case
Cable

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
SCSI Select carrier.
Switch
LED Cable
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.
Take Apart SCSI Select Switch Cable - 13


SCSI Select
Switch Cable
Before you begin, remove
the following:
SCSI Select