Specifications

Appendix B

Table B-8 lists the functions of the main components and circuits of the printer.

The

CPU converts the print data sent from the host computer to image data (the print

image). The image data is then loaded into RAM. Each line of data is processed

sequentially. The CPU transfers the print data to the printhead drive circuit. The

CPU sends the printhead drive pulse to the printhead drive circuit. The length of

this pulse corresponds to the printhead drive voltage. The head drive circuit then

outputs the head drive signal.

G/A

E05A86

RAM

CPU(IC21)

Image Data

Image

Transier

Buffer

Trigger

Data output

Data Latch and

Delay control

Printhead

Epson LQ-570+/1 070+

B-7

Figure B-3. Data Flow