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2.3.3
Power Requirements
Because the disk dr i ve does not include a power supply, a
dc source must be supplied as follows.
~
SPECIFICATION
+24 V POWER SUPPLY
+5 V POWER SUPPLY
Voltage
+24 + 10%
+5 V + 5%
Normal Current
0.75 A
0.8 A
0.9 A
(Wi thout VFO)
(With VFO)
Starting Current
0.9 A
0.8 A
0.9 A
(Without VFO)
(With VFO)
Ripple voltage
Not greater than
Not greater than
400 mVpp
70 mVpp
Transient response
200 ms
time
2.4
INSTALLATION PROCEDURE
Perform the following procedures to install the disk drive.
2.4.1
Preinstallation Inspection
a.
Inspect for
damage,
loose parts,
or other obvious
indications of problems.
Check that all connectors
are tightly mated.
b.
Remove the dummy flexible disk from the unit.
c.
Insert a flexible disk through the door, press the
door handle to latch posi tion, and check that the
collet assembly engages
the flexible disk wi thout
binding.
Turn the spindle and check that the flex-
ible disk rotates freely.
d.
Press the door handle and check that the flexible
disk is ejected.
2.4.2
Drive Designation
If more than one disk dr i ve is connected to the same con-
troller
and
the signal
interface connectors are wired in
series from a common controller port (daisy chain), remove
the terminating resistors from all disk dr ive PCBs except
the last
uni t
in the ser i es.
Instr uctions for
this pro-
cedure are provided in section 2.4.2.1.
If more than one
disk drive
is connected to a
single controller,
identify
each disk drive by an addressable number (DXl, DX2, DX3, or
DX4).
Instructions for this procedure are provided in Sec-
tion 2.4.2.2.
2-4
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