Epson STYLUS 4001968 Service Manual page 18

General Description
Table 1-6. Signal and Connector Pin Assignments (Continued)
Pin No. Signal Name
16
17
18 NC
19-30
INIT
31
32
ERROR
33
34 NC
35
36 -
Note: The direction of the signal is as viewed from the printer.
1-1o
I/o
Signal ground.
Chassis ground. (Both chassis ground and signal ground are
-
connected in the ptinter.)
Not
Twisted-pair return signal ground.
If this signal goes LOW, the printer is initialized. The pulse
I
width of this signal must be 50 pS or more.
This signal goes LOW if the printer:
o -
has a fatal error.
- runs out of paper.
.
Signal ground.
.
Not
.
Pulled up to +5 Vthrough 1.0 KW resistor in the printer.
.
Not used. (* Reserved.)
Description
Manual
Rev. A