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SECTION 7
LINE PRINTERS
This section describes the functions, charac
teristics, operating and maintenance procedures
for the PRU9103/9l04/9l05/9l06 Line Printers
available for Level 6 system use (see Figure 7-1).
The printers are designed to produce high quality
printed output at medium to high printing speeds
of 240 to 600 lines per minute LPM. The
printers have 64- and 96ASCn character code sets
and offer l36-column printing with vertical
spacing of six or eight lines per inch. With Option
PRF9l 0 1 installed, the printers have the added
capability of increasing their format flexibility by
having their paper spacing controlled by a 12
channel paper tape. The printers interface with
the Level 6 processor by means of a single-board
multiple device controller (MDC9101), a Printer
Device-Pac (Interface Adapter) (PRM9l 01) and a
50-foot cable.
Figure 7-1. PRU Line Printer
LINE PRINTER ASSEMBLY
The line printer is a self-contained, free-stand
ing device consisting of the printer mechanism
and associated electronics housed in a single
cabinet.
LINE PRINTERS
Functional Description And Characteristics
The line printer prints single-spaced copy at a
rate and with a character set that is determined by
the type of printer used (see Table 7-1). The
TABLE 7-1. LINE PRINTER CAPABILITIES
Rate
Printer
Lines Per
Minute
ASCII
Character Set
Option 2
PRU9103
240LPM
96-ASCII Set
l
PRF9101
PRU9104
300LPM
64-ASCII Set
PRF910J
PRU9105
480LPM
96-ASCII Set
1
PRF9101
PRU9106
600LPM
64-ASCII Set
PRF9101
1 Upper/lower alphabet print capability
2pRF9l0l Vertical Format Unit
NOTE: All printers offer 136-column printing and 6-or
8-lines per inch vertical spacing.
standard unit record for the printer is a printed
line of 136 characters in length. Vertical spacing
may be set at either six or eight lines per inch.
The printer accepts continuous paper forms.
The forms can be single-ply or they can have an
original and up to five carbon copies. Holes in
both margins of the paper are engaged by tractors
on the device which feed the paper through the
printer.
Printing is accomplished by means of print
hammers that strike the paper against a con
tinuously rotating drum, the surface of which
contains all print characters. When a line is
printed, only the paper and ribbon directly over
the activated print hammers are forced against the
drum. As a print compare is made, the hammers
strike the paper at the same time that the
appropriate row of drum characters is centered
over the print hammer gap.
LINE PRINTER DESIGN
Reliability and maintainability are the key
factors engineered into the design of the line
printer, making it a truly dependable device with
minimum intervention on the part of the operator
in the areas of operation and maintenance.
Easy paper loading with front-access swing
open drum gate mechanism and a print hammer
mechanism with a c1utchless paper feed are but
some of the features incorporated into the design
of the device in order to simplify operation and
facilitate and reduce maintenance.
7-1
AT04
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