2-3
(2) Printer control board
The printer control board consists of a main controller, memory, sensor receivers, drivers, a Centronics
parallel interface controller, and an RS-232C serial interface controller. This board governs the computer
interface, control panel, and printing mechanism using the main controller and memory that holds resident
character patterns and firmware including resident emulation programs.
(3) Control panel
The control panel is used by the user for operations such as changing or feeding paper, resetting the printer,
and selecting printer features in setup mode. The control panel indicates the printer status using a buzzer
and LED indicators.
(4) Power supply
The power supply provides power for operating the printer. Its specifications depend on the input AC
voltage.
(5) Cut-sheet feeder (user option)
The cut-sheet feeder is driven by a gear on the platen shaft. It has a cable to be connected to the printer for
controlling the feed rollers in the cut-sheet feeder. The feeder enables cut sheets to be fed and printed
continuously.
(6) Tractor unit (user option)
A second tractor unit can be installed if the user requires dual tractor feeding capability.