5. Check for debris or foreign material between the
heads and remove same.
6. Check plastics for broken or cracked pieces,
e.g., write protect lever, guide rails, etc.
NOTE: To ensure proper operation of the Drive, the chassis
should
be
connected to earth ground. The 3/16-inch
(4.76
mm)
male
QC
lug,
located at the rear
of
the chassis,
is
provided for this connection.
MOUNTING THE DISK DRIVE
The Drive can
be
mounted
in
any plane,
i.e.
upright, hori-
zontal
or
vertical. However, when it
is
mounted horizon-
tally, the Logic
PC
board side
of
the chassis must
be
the
uppermost side. Tapped holes
are
provided
in
various loca-
tions for the attachment
of
user-supplied hardware.
RESISTOR TERMINATION
(See
Figure 2)
1. The Resistor Termination
in
the
IC
socket
is
used
in
the last drive
in
the
system only.
It
must be
removed for
Drive
two when two external drives
are used.
Note: The internal drives
in
the
Model
III
are not
terminated.
RESISTOR
TERMINATION
(IN SOCKET). REMOVE
EX·
CEPT FOR
LAST
DRIVE
IN
SYSTEM
~D:
2F
80
7
14 1
1F
FIGURE 2. RESISTOR TERMINATION
J1
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
FLAT RIBBON CABLE ASSEMBLY
(See
Figure
3)
2. Connector for second internal drive (Drive one)
and second external drive (Drive three), pins 10,
14 and 32.
Pins must
be
removed from
Drive
connectors on the Cable
Assembly
as
follows and
as
illustrated:
1. Connector for first internal drive (Drive zero) and
first external drive (Drive two), pins 12, 14 and 32.
DRIVE DRIVE
DRIVE
DRIVE
NUMBER ZERO NUMBER ONE
NUMBER
TWO
NUMBER THREE
12
10
12
10
14 14
14
14
32
32
32
32
FIGURE 3. CABLE ASSEMBLY - CONNECTOR
PIN
REMOVAL CHART
96
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