Epson LX-810 User Manual page 296

platen
The black roller that provides the backing for the paper during
printing.
print quality
Your printer has two types of print quality; draft and near letter
quality (NLQ). Draft is for high-speed, draft-quality jobs; Near
letter quality is used to produce more polished documents.
pull tractor unit
An optional device that feeds continuous paper and multi-part
forms through the printer.
push tractor
A built-in device that feeds continuous paper through the printer.
RAM
Random Access Memory. The portion of the printer's memory
used as a buffer and as a place for storing user-defined characters.
All data stored in RAM is lost when the printer is turned off.
reset ^
To completely reset the printer settings to their initial default
status using the ESC @ command. Unlike initializing the printer,
however, a reset does not clear the user-defined character set from
the input data buffer.
self test
A method of checking the operation of the printer. When the self
test is run, the printer prints out its current DIP switch settings ^
and the characters that are stored in its ROM (Read Only
Memory).
serial interface
A serial interface transmits data one bit at a time. See also parallel ^
interface. ^
GL-8 Glossary