Epson 24-PIN DOT MATRIX PRINTER LQ-570+ - Manual (Page 153)

The black roller that provides a backing the paper during
The area of a page on the printer can print. It is slightly
than the physical size of the page due to margins.
varies. from
to example, a capital W much
Random memory. The of the memory
To return a printer to its status by sending a To return a printer to its status by sending a
OIL OIL
A method for checking the operation of the printer. When you
run the self test, the printer prints various spedfkation
and the characters stored in its ROM.