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The following describes the pinout of the parallel (Centronics-type) inter-
face connector (signals which are low when active are overlined):
I Pin 1 Name
1 Function
I
17
CHASSIS
18 +5v
Chassis ground (isolated from signal ground)
+5V DC output from printer
19-30 1 GND
31 1 RESET
Twisted pair ground return
1 When this input signal is low, printer is reset
32
ERROR
33
EXT GND
34.35
N/C
Outputs low when pr;lter cannot continue, due to an error
External ground
1
36
SELECT IN
Always high
1
-
118