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To open the window, turn the key to position 2 or 3, then slide the window
down. To close the window, slide the window up, then turn the key to lock
the window in position.
Figure 1-4 shows the three key positions and the controls accessible in each
position.
Figure 1-4: Key Positions
KEY POSITION 1
NO ACCESS TO CONTROLS
KEY POSITION 2
ACCESS TO TAPE DRIVE
AND FIXED DISK CONTROLS
KEY POSITION 3
ACCESS TO ON/OFF SWITCH
AND FRONT DOOR RELEASE LATCH
MLO-1205-87
When the window is up and the key is turned to position 1, the window
is locked in the closed position. You cannot use any controls when the
window is closed, but lights indicating power to the system and activity on
the disks and tape are visible through the window. Figure 1-5 shows the
closed window and key position.
System Overview 1-5
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