Operator`s manual

Conﬁguration of the printer is accomplished with the use of the control

panel and printed menus. The printer is capable of operating in either

7 or 8 bit modes and with the Digital serial I/O protocol.

1.3.2 Printer Mechanism

The LG31 printer mechanism consists of mechanical and electromechani-

cal hardware. The printer mechanism performs ribbon/paper motion and

translates the binary print data to printed characters on paper by means

of the print shuttle.

1.3.3 Control Electronics

The control electronics of the LG31 printer coordinates the functions and

operations of the serial interface, control panel, and printer mechanism.

1.3.4 Serial Interface

The EIA RS-232-C serial interface provides the bidirectional communi-

cations link between the host and the printer. Bidirectional communi-

cations allow print data to be sent to the printer and various types of

data (XON/XOFF protocol, status reports, printer identiﬁcation, and so

on) to be sent to the host from the printer. The ASCII/ISO 7-bit code and

alphanumeric characters are used for information interchange between

the printer and the host (data source).

1.3.5 Power Supply

The LG31 printer’s power supply provides regulated dc power to the

control electronics and printer mechanisms. The ac power is rectiﬁed

and regulated to assure reliable printer operation. The power supply

automatically adjusts to ac input voltages in the range of 100 to 240V ac

at 50 to 60 Hz and constantly monitors the dc output voltages.

1.4 Printed Circuit Boards

The LG31 printer printed circuit boards are listed in Table 1–1.

1–4 GENERAL INFORMATION