Kyocera FS-3700 - Manual (Page 106)

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 de-
vice) equipped with an RS-232C serial interface. (The serial interface is set to RS-232C be-
fore leaving the factory.)
In RS-422A mode, the printer can be connected to a personal computer (or similar de-
vice) 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. Kyo-
cera shall not be liable for damage due to improper changing of this main cir-
cuit 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:
F
Before touching the main circuit board, touch a water pipe or other large metal object
to discharge yourself of static electricity. While doing the work, it is recommended
that you wear an antistatic wrist strap.
F
Touch the main circuit board only by the edge.
C.2. RS-232C/RS-422A Interface
C-6