Service manual

General Description
EPL4600/ActionLaser 1600 Service Manual
1.3.3 Optional LocalTalk Interface
This printer can use the optional LocalTalk interface module.
Type:
LocalTalk
Signal level:
Same as 179422 signal level
Protocol:
X-ON/X-OFF (cann ot be combined with DTR control)
DTR control (cannot be combined with X~N/X43FF)
Transfer speed:
230.4 K bps
Signal description:
See Table 1-11.
Table 1-11. LocalTalk Interface Pin Assignments
Pin No.
Signal Name I/o
Description
1
DTR
~uT
Signal output by the printer. When the DTR signals HIGH, the
RXD signal can be received by the printer.
2
CTS
IN
The printer transmits the data through TXD while CTS is
HIGH.
Serial ASCII data output from the printer.
HIGH level; when SD+ voltage is higher than SD- voltage.
3
TXD-
OUT
LOW level; when SD+ voltage is less than SD- voltage.
Logic O is “SPACE” and logic 1 is “MARK” state must be
maintained between transmitted character codes.
4 GND
Ground.
Serial ASCII data input from computer.
HIGH level; when RD+ voltage is higher than RD- voltage.
5
RXD-
IN LOW level; when RD+ voltage is less than RD- voltage.
Logic O is “SPACE” and logic 1 is “MARK” state must be
maintained between transmitted character codes.
6 TXD+
OUT
Refer to TXD-.
7
NC
No connect.
8 RXD+
IN
Refer to RXD-.
1-18
Rev. A