IBM 3590 - Manual (Page 23)

Chapter 2. A14, C10, and C14 Control Unit Operator Panel
The operator panel, shown in Figure 1, provides a means for the customer to
either power on or power off the 3590 A00, A50, or A60 Subsystem. In addition,
it provides power status feedback, whether or not errors are present on the
A00, A50, or A60 control unit. The following information describes the
operator panel switches and indicators:
Figure 1. A14, C10, and C14 Operator Panel
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