Rs-422A Interface - Kyocera FS-6900 User Manual

DTR - Data Terminal Ready - (Pin 20)
This output is used as a buffer nearly-full handshake line. It is held high (above 3 volts)
when the buffer can accept more data.
RS-232C Interface Voltage Levels
The voltage levels of the interface signals conform to EIA RS-232C specifications. SPACE
is from 3 volts to 15 volts. MARK is from -3 volts to -15 volts. Voltages between -3 volts and
3 volts are undefined.

RS-422A interface

The serial interface of this printer was set to RS-232C mode before leaving the factory. How-
ever, by changing the jumper connector on the main circuit board, the interface can be
changed to RS-422A mode.
In RS-232C mode, the printer can be connected to a personal computer (or similar
device) equipped with an RS-232C serial interface. (The serial interface is set to RS-
232C before leaving the factory.)
In RS-422A mode, the printer can be connected to a personal computer (or similar
device) equipped with an RS-422A serial interface.
The changing of the main circuit board jumper connector should be carried out only by
a Kyocera authorized dealer or Kyocera certified technician. Kyocera shall not be liable
for damage due to improper changing of this main circuit board jumper connector.
Removing the Main Circuit Board
The following instructions are intended for the technician only.
Notes on Handling the Main Circuit Board
Protect the electronics by taking these precautions:
Before touching the main circuit board, touch a water pipe or other large metal object to dis-
charge yourself of static electricity. While doing the work, it is recommended that you wear
an antistatic wrist strap.
Touch the main circuit board only by the edge.
C.2. RS-232C/RS-422A Interface
C-5