Specifications

1.3.3 Printer Mechanism
The printer mechanism consists of the mechanical and electro-mechanical
hardware in the printer. The printer mechanism performs ribbon and
paper motion, and translates the binary print data to printed characters
on paper through the print shuttle.
1.4 Features
1.4.1 U.S. ASCII 7-Bit and 8-Bit Codes
When the host computer interface is set to 8-bit mode, the LG31 printer
processes all eight bits of the received characters. When the host
computer interface is set to 7-bit mode, the LG31 printer processes seven
bits of the received characters.
1.4.2 Electronic Vertical Forms Unit (EVFU)
An electronic vertical forms unit is provided for automatic print place-
ment on forms up to 559 mm (22 in) long.
1.4.3 Diagnostics
The LG31 printer automatically self-tests and displays the diagnostic
result on the control panel’s three-character LED display. The 10-second
self-test is performed at power-up, following a print test, and when
commanded by an external device. If a fault is detected, a corresponding
fault code is displayed, and the audio alarm sounds.
1.4.4 Print Actuator Modules
Line matrix impact printing is performed by three print actuator mod-
ules, which print one dot line on each horizontal swing cycle. Each print
module contains 11 print actuators. Individual print actuators are acti-
vated at each position where a dot is required. After the first horizontal
dot row is printed, the shuttle reverses direction and the paper is ad-
vanced to the next horizontal dot row.
1–4 INTRODUCTION