Control Data Corporation CDC CC63X Hardware Maintenance Manual page 26

TABLE 2-1. CONTROLS AND INDICATORS (CONTD)
CONTROL/INDICATOR
CONTRAST Control
LINE VOLTAGE Switch
DATA SET READY INDICATOR
(Green)
LOCK (Keyboard Locked)
Indicator (Red)
FUNCTION
Allows the operator to adjust the
intensity variation between the nor-
mal characters and background. This
control is located at the front of
the terminal.
Allows for selection of the appro-
priate line voltage range (115/220 V
ac) for terminal operation. This
switch is located at the rear of the
terminal. CAUTION: This switch
must be set to agree with the line
voltage.
Illuminates if the Data Set Ready
signal at the modern (host) interface
is present. The DSR indicator is
located at the front of the terminal.
Illuminates during a page print
operation. The keyboard is also
locked and the LOCK indicator is lit
if the terminal is unable to transmit
data due to loss of modern control
signals such as CTS or DSR while the
terminal is online and ready to send,
or if the terminal is disabled by
host command. Also, the keyboard is
locked out during block mode communi-
cation with the host or when a disk
operation is active. The LOCK indi-
cator is located at the front of the
terminal.
MESSAGE (Message Waiting) This indicator is under program
Indicator (Red) control. The MESSAGE indicator is
located on the front of the terminal.
ALERT Indicator (Red)
M-REL (Manual Release)
2-2
Used as an alternate visible alert
Iwhen the audible alarm is disabled or
Icannot be heard. It is controlled
Iby a programmable bit. The Alert
I indicator is located at the front of
Ithe terminal.
I
IThis key will perform a firmware
Imanual release. Any print or host
loperation is aborted.
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