Epson FX-80 Operation Manual page 173

Signal Return
Signal Direction Description
Pin No.
Pin No.
12
30 PE Out A "HIGH" signal indicates that the printer
is out of paper.
13 -
-
- Pulled up to +5V through 3.3 k11 resis-
tance
14 -
AUTO FEED XT In
With this signal at "LOW" level. the paper
is automatically fed one line after printing.
(The signal level can be fixed to "LOW"
with DIP SW pin 2-4 provided on the
control circuit board.)
15 -
NC
- Not used.
16 - OV - Logic GND level.
17
-
CHASSIS GND - Printer chassis GND.
In the printer, the chassis GND and the
logic GND are isolated from each other.
18
- NC - Not used.
19 to 30 - GND - TWISTED-PAIR RETURN
signal GND
level.
31
_
..
-
INIT
In
When the level of this signal becomes
"LOW", the printer controller is reset to
its initial state and the print buffer is
cleared. This signal is normally at "HIGH"
level, and its pulse width must be more
than 50 p..s at the receiving terminal.
32
-
ERROR Out The level of this signal becomes "LOW"
when the printer is in-
1. PAPER END state
2. OFF-LINE state
3. Error state
33 - GND - Same as with Pin Nos. 19 to 30.
34
-
NC
-
Not used.
35
- -
-
Pulled up to +5V through 3.3 k11 resis-
tance.
36
-
SLCT IN In
The DC1/DC3 code is only valid when this
signal is "HIGH" level. (Internal fixing can
be carried out with DIP SW pin 2-1. The
level of this signal is factory-set to
"LOW".)
B-2