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Appendix A

TECHNICAL SPECIFICATIONS

w Printing Mechanism
Printing method
Printing speed
Printing direction
Text:
Dot graphics:
Print head
Serial impact dot matrix
142 characters per second (draft pica)
47 characters per second (LQ pica)
Bidirectional or unidirectional (select-
able), logic seeking
Unidirectional, logic seeking
24 Pins
Life: 200 million dots
Ribbon Black fabric ribbon cartridge
Life: 2 million draft characters
Paper feed Friction and push-tractor feed
Semiautomatic sheet loading
Paper feed speed 3.4 inches/second (during page feed)
n interface and Emulation
Interface Centronics-compatible, 7 or 8 bit,
TTL-level
Data buffer 7K bytes when not used for download
characters
l-Line buffer when using download
Emulation modes Epson LQ-800 and IBM Proprinter X24
n Switches and indicators
Power switch Rocker switch
Control panel 4 Membrane switches, 10 LED indicators
DIP switches 16 pins
51