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Installation And Configuration
3
3-1.
INTRODUCTION
This chapter contains a summary of drive installa-
tion information, compiled for use by service-
trained personnel. For detailed installation infor-
mation, including unpacking instructions, cabinet
installation procedures, input voltage and frequen-
cy configuration, and initial checkout tests, refer
to the H P 7936 and 7937 Disc Drives Operating
and Installation manual, part no. 07937-90902.
WARNING
The drive does not contain operator-
serviceable parts. To prevent electrical
shock, refer all maintenance activities to
service-trained personnel.
3-2.
SHIPPING LATCH
CAUTION
Do not operate the Shipping Latch
when the drive LINE- switch is in the 1
(in) position. The drive must be in a
powered-down state before the latch is
moved.
Do not attempt to operate the drive
with the Shipping Latch in the
a
(Ship) position. If the drive is powered
up with the latch in the
a
position, a
servo fault will occur (Red and Yellow
LEDs illuminated).
To recover from
this situation, power down the drive,
move the: latch to the
I
(Operate) posi-
tion, and then power up the drive.
The drive shipping latch prevents the drive head-
disc assembly from being damaged by vibration
and shock during shipment and installation of the
drive. The latch is located behind the rear panel
and can be activated by a medium-sized flat-blade
screwdri ver through a rectangular opening in the
rear panel. See figure 3-1.
The latch settings are indicated by symbols on the
latch, visible through the rectangular opening. The
a
symbol is the "Ship" setting and the
I
symbol
is the "Operate" setting. The latch must remain in
the
a
(Ship) position until the drive is installed
at its operating location and is ready to be
powered on. At this time, the latch should be set
to the
I
(Operate) position and then the drive
powered on.
NOTE
If the latch is inadvertently moved to
the
a
(Ship) setting after the drive is
powered on, the latch may overshoot
the
a
(Ship) setting. (The latch is in an
overshoot state if the
a
(Ship) symbol
moves to the right, past the range of
visibility of the rectangular opening.)
If an overshoot occurs, the drive will
continue to operate normally as long as
power is not turned off. However, to
ensure that data is not destroyed, the
following procedure should be perform-
ed immediately to reset the latch:
1. Power down the drive by setting the
LINE- switch to the 0 (out) position.
2. Disconnect the HP-IB connector.
3. Power up the drive.
4. Wait for the drive to finish its inter-
nal
self-test diagnostic routine
(ap-
proximately 10 seconds).
5. Insert the tip of a small flat-blade
screwdriver through the round over-
shoot opening in the rear panel (see
3-1
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