Kyocera FS 3700 FS-1700/3700 Users Manual - Page 106
RS-422A interface, C-6
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C.2. RS-232C/RS-422A Interface 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. However, 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 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. 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: 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-6