Service manual

ENWW Chapter 5 Theory of operation 99
Formatter system
The formatter system is responsible for the following:
● receiving and processing data from the various printer interfaces
● monitoring control-panel input and relaying printer status information (through the control
panel and the I/O)
● developing and coordinating data placement and timing with the print engine
● storing font information and macros
● communicating with the host computer
The formatter receives data from the I/O and converts it into a dot image. The formatter then
sends a print signal to the engine controller assembly. The engine controller assembly
synchronizes the image-formation system with the paper-feed system, and signals the formatter
to send the print-image data. The formatter sends the print-image data (dots) in the form of a
video signal and the printing process begins.