(10) Repeat Step (8)
to
return the
disk
drive
to
the
Ready
condition.
(11) Place
the
power ON /
OFF
switch
to
the
OFF
position;
verify that:
• The positioner immediately retracts the heads from over the dlsk(s)
at
a high
rate
of
speed (emergency unload).
• The cartridge access
door
is locked (front load models); the cartridge lock arm
is locked (top load models).
(12) Before
the
disk
has
the
opportunity
to
coast
to
a stoP. place the power
ON/OFF
switch
to
the
ON position; verify
that
the SAFE
indicator
does
not
become
illuminated
until
after
the
disk(s) has coasted
to
a
stop.
(13) Remove the cartridge as descri bed
in
Paragraph 3.4.2
or
3.4.4.
(14) Place
the
power
ON/OFF
switch
to
the
OFF pOSition.
(15) Position the Servo PCBA in the closed position and secure
it
to
the
Logic
PCBA
with
the
two
captive retaining screws (shown in Figure 2-3).
(16)
Slide the spring-loaded sleeve
of
the
Logic
PCBA pivot lock downward
to
release
the pivot lock (see Figure 2-3).
CAUTION
OPERA
TOR
MUST EXERCISE CAUTION WHEN EXTEND-
ING OR LOWERING THE LOGIC PCBA
AND
SERVO
PCBA
TO
AVOID CRIMPING CABLE
AND/OR
DISEN-
GAGING MOLEX CONNECTORS.
(17) Lower the
Logic
PCBA and secure
it
to
the PCBA support brackets using the
two
retaining screws (shown
in
Figure 2-2).
2.5
INTERFACE CONNECTIONS
The 03000 interface is configured
to
provide
flexibility
in
the design
of
new controllers and
remain
compatible
with
existl ng controllers designed
for
the 01000 and 05000 Disk Drives.
The
03000
will
also operate
in
conjunction
with
the F3000 Disk Formatter.
The 3M
flat
cable used in the fabrication
of
the
03000
Input/Output
(I/O)
cables has the
following
specifications.
(1) Number
of
conductors:
36
(2)
Conductor
size:
24
(3) Impedance: 100 ohm
The maximum length
of
conductor
between the 03000 and the
Controller/Formatter
in a
multiple
cisk
drive
installation
is
6.1
m (20 feet). The maximum length
of
conductor
between adjacent
disk
drives In a daisy-chain
configuration
is
3.0 m (10 feet).
03000 Disk Drives are
normally
supplied
with
a mating
input/output
cable board and a
termination board. These boards
must
be installed as shown
in
Figure 2-7. Interface
signals are routed
to
and from the
disk
unit
via
the
Input/output
cable board. Table 2-2
shows the
input/output
lines required. Details
of
the interface are contained in Section III.
2-8
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