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The following list describes the parts of the Model
140, shown in Figure 4-2 on page 4-3.
Covers can be removed to allow access to the rear
of the Model 140. If the Model 140 is to be operated
in a wiring closet, it is desirable to operate it
without the rear cover for purposes of cooling.
Note: Only trained service technicians should work
inside the Model 140.
Serial number is located in the left front corner of
the top cover.
Key mode switch is a key-controlled switch with
three positions, labeled:
Normal
Secure
Service.
Note: The key mode switch also locks the cover of
the Model 140.
Power switch has the international symbols I for On
and 0 for Off. When the power switch is set to On,
the power-on light-emitting diode (LED) comes on.
Reset button is located next to the 3-digit display
and is labeled Reset.
Diskette drive is a 1.44-MB, 3.5-inch diskette drive
that has an in-use LED and a diskette-eject button.
Power supply fan is located in the rear left corner of
the Model 140.
Rear fan is located in the right rear corner of the
Model 140.
4-4
6611 Operations Pocket Guide
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