Brother HL-1260 service manual Signal Name IN/OUT Explanation Frame Ground

USER’S GUIDE

Signal Description

Signal Name	IN/OUT Explanation
FG	–	Frame Ground
SD	OUT	Send Data.
RD	IN	Receive Data. Receives data transmitted from the
		computer.
RS	OUT	Request To Send. “SPACE” level when the printer
		is ready to send data to the computer.
DR	IN	Data Set Ready. When DSR is at “SPACE” level,
		data can be accepted.
SG	–	Signal Ground
ER	OUT	Data Terminal Ready. “MARK” level when the
		printer is Busy.

Appendix–12