Control Data Corporation CYBER 170 Series Operator's Manual page 292

CD
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UNIT
NUtIBER
Figure D-5. 677/679 Tape Unit Operator Control Panel
Prior to operating the tape unit, review thoroughly the
description of control switches and indicators. The
following operating instructions apply to all 667/669 and
677/679 tape units unless specifically noted.
REEL INSTALLATION
Standard (Noncartridge) Reel
1. Power up unit by pressing POWER switch.
POWER light illuminates and the window lowers.
2. Install write-enable ring within inner surface
cutout of reel if write operation is to be
performed. The write-enable ring is to be
installed only if a write operation is to be
performed. Valuable data stored on the tape must
be protected by removing the write ring when
read only operation is to be performed.
3. Place reel into right hub. Ensure that reel
is
fully
seated against hub face.
4. Manually' rotate reel hub clockwise until several
inches of tape leader extend along inner surface
of tape chute.
Cartridge-Loaded Reel
D-8
1. Perform steps 1 and 2 as for standard reel.
2. Orient cartridge reel on hub so that locating
notches in cartridge retainer and chute assembly
align with keys on outer rim of cartridge. Ensure
too t actuator rod fi ts into recess of cartridge
latch.
3. Press cartridge into place on hub; seat firmly
against hub face.
LOAD/THREAD
Operator action,. such as pressing LOAD/REWIND switch,
initiates a load/thread operation. The cartridge actuator
rotates clockwise until the cartridge is brought to the full
open position. Observe the following points for either
cartridge or standard reels.
1. Tape proceeds along tape feed path and enters the
left vacuum' reel enclosure.
2. Left reel rotates clockwise until load point
marker is detected. Reel motion then ceases~
3. Tape is drawn immediately into loop columns and
drops below AR and AL sensors.
4. Motion stops when ioad point marker is correctly
posi tioned.
READY STATUS
At completion of load/thread sequence, the tape unit is
placed in ready status if the READY (667/669) or START
READY (677/679) switch on the front panel of the tape unit
has been pressed. The indicator illuminates, followed by
the SELECT light, indicating receipt of an on-line callup by
the system.
REWIND
The LOAD/REWIND switch rewinds a tape to load point
when the tape unit is off-line. It is not necessary to use
this switch during normal operation, since the operating
system controls tape movements.
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