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THESE INDICATORS
VIS I 8LE ONLY WHEN
SECTION VI.
TYPE 122 PRINTER
POWER
TYPE ROLL
ON
OFF
ON
OFF
DODD
ILLUMINATED
--+-
CYCLE
BRK I DC
FAN
FORMS
LAMP
POWER ON
POWER OFF
TYPE ROLL ON
TYPE ROLL OFF
START
RIBBON
SINGLE
FORM
SPACE
SPACE
START
STOP
DODD
I
I
This momentary-contact switch controls the application
of power to the printer.
The POWER ON indicator of
the switch is illuminated when a-c and d-c power are
applied to the printer.
When depressed, this switch is
interlocked so that the printer will not be ready for
operation until a certain required start procedure has
been performed (see page 6-10).
Pressing this momentary-contact switch removes power
to the printer.
the POWER OFF switch is not inter-
locked; if it is used as an emergency stop control when
the printer is operating, the results are unspecified.
The POWER OFF indicator of the switch is illuminated
when a-c and d-c power (except for the 24-volt d-c
indicator power) are turned off.
The TYPE ROLL ON switch is used to control the ap-
plication of power to the type roll (print drum).
The
TYPE ROLL ON indicator associated with this switch
is illuminated when the type roll is rotating at full
speed.
After pressing this switch, there is an auto-
matic delay of approximately three seconds before the
printer can be started.
This delay is necessary for
the type roll to reach full velocity.
The TYPE ROLL OFF switch is used to turn off the
type roll motor.
When pressed, it contains no inter-
locks against possible error conditions.
The TYPE
ROLL OFF indicator associated with this switch is
illuminated when the type roll is off.
If only the type
roll and paper motion need to be stopped, this switch
can be used as an emergency stop control.
The
TYPE ROLL OFF switch should
be
pressed (to stop
the type roll) before disengaging the type roll assembly
for paper, r,ibbon, or type roll changing.
The type
roll contains an automatic interlock, however, which
turns it off whenever the assembly is disengaged.
The START function is controlled by two switches
which are physically located in two different places in
the printer.
The switches are wired in parallel and
6-5
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