Epson Stylus 1520 User Manual page 257

Signal Return
Pin Pin Signal
11 29
12 28
13 28
14 30 AUTO
15 -
16 -
17 - CHASSIS
18 - Logic H
19-30 -
31 30
Direction
BUSY OUT
PE OUT
SLCT OUT
IN
FEED
XT
NC -
GND -
-
GND
OUT
GND -
INIT IN
Description
A HIGH signal indicates the
printer can not receive data.
The signal goes HIGH in the
following cases:
1) During data entry
(for each character)
2) During initialization
3) During self test,
demonstration, and
default-setting printing
4) During a printer-error state
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.
Specifications
C
C-15