Epson Stylus 1500 Reference Manual page 100

Signal Return
Pin Pin
12 28
13 28
14 30
15 —
16 —
17 —
18 —
19-30 —
31 30
32 29
33 —
34 —
35 —
36 30
B-12
Technical Specifications
Signal Direction
PE OUT
SLCT OUT
AUTO IN
FEED
XT
NC —
GND —
CHASSIS —
GND
Logic H OUT
GND —
INIT IN
ERROR OUT
GND —
NC —
+5 V OUT
SLIN IN
Description
A HIGH signal indicates the
printer is in a paper-out state
or in an error state.
Pulled up to +5 V through
1 k resistance
Not used
Not used
Logic ground level
Printer's chassis ground,
which is connected to the
logic ground
Pulled up to +5 V through
3.9 K resistance
Twisted-pair return signal
ground level
When this signal goes LOW,
the printer controller is reset
to its state when the power is
first turned on and the print
buffer is cleared. This level is
normally HIGH; its pulse width
must be more than 50 s at
the receiving terminal.
This signal level goes LOW
when the printer:
1) Is out of paper
2) Is in an error state
3) Has no ink cartridges
installed
Same as for Pins 19-30
Not used
Pulled up to +5 V through
1.0 K resistance
Not used