830D
(6)
With a large shank screwdriver (used as a crowbar) pry the tension arm forward
by compressing the tension arm spring toward the front
of
the base. This action
will establish enough slack in the belt
to
allow the belt loop mentioned in Step
(5)
to
be
slipped down and around the drive
motor
pulley. Release pressure
on
the
tension arm.
(7)
Inspect the belt
for
location on all driven surfaces and also determine that the belt
does not contact any surface that will cause belt abrasion.
(8)
By hand, pull the belt through several revolutions of the drive system in order
to
allow the belt to seek its normal operating path. This action will also establish the
correct tension
of
the belt between pulley spans.
NOTE
If
the
belt
comes in contact with any structural member,
either raise
or
lower the drive
motor
pulley on the
motor
shaft
until
the
belt
clears the obstruction.
(9)
Inspect the static discharge contact located
on
the end
of
the spindle shaft (see
Paragraph
6.20).
(10)
Reinstall the belt guard.
(11) Return the
disk
drive into the enclosure.
6.20 STATIC DISCHARGE CONTACT
The static discharge Rulon contact is located on the
belt guard. This contact provides a
ground path from the spindle shaft to ground. Continuity is maintained by the tension
of
the metal spring on which the Rulon contact is mounted. Grounding
of
the spindle shaft
thus prevents a buildup
of
static electricity on the
disk
surface.
Inspection is made as
follows.
(1)
Remove three No.1 0 machine screws securing the belt guard in place.
(2)
Slide the belt guard forward until
it
is free
of
the base.
(3)
Inspect the static discharge Rulon contact
for
wear.
NOTE
If
the Rulon contact shows signs
of
excessive wear from
the pain ted end
of
the spindle shaft, replace the belt guard
[PERTEC Part No.
102748].
(4)
Reinstall the belt guard.
(5)
Return the
disk
drive into the enclosure.
6-80
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