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Pin
No.
25
26
Signal Name
TWISTED PAIR
RETURN (PIN
7)
TWISTED PAIR
RETURN (PIN
8)
I/O Classi-
fication
Functional Description
DATA 6
DATA
27
TWISTED PAIR
DATA 8
Return lines of various signals.
RETURN (PIN
9)
______________
~
____
~
______________________ Connect a twisted pair cable to
28
TWISTED PAIR
ACK
each of these pins and its
_________ RE_T_U_RN __
~(P_I_N
__ l_O_) ______________________ relevant signal pin.
29
30
TWISTED PAIR
RETURN (PIN
11)
TWISTED PAIR
RETURN (PIN
12)
31
INPUT PRIME
32
ERROR
33
EAl GND
34
(NC)
35
(NC)
36
(NC)
IN
OUT
BUSY
PAPER END
A signal for resetting the control circuit.
When this signal level goes low, the printer
is initialized, and the memory buffer is
cleared.
This signal level goes low, when the printer
is put in abnormal states in which printing
is disabled.
External ground
(unused)
(unused)
(TTL High Level)
-65-
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