Kyocera FS-1050 Service Manual - Page 171

Serial interface Optional

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Serial interface (Optional) The printer is equipped with an optional slot for adding a serial port. To add a serial port, the serial interface board is equipped. The device responsible for controlling the serial interface is integrated in the gate array in the controller system. The serial interface supports both protocols of RS-232C and RS-422A. Toggling the protocol between RS-232C and RS-422A is made by a shorting jumper socket that is accessible on the main board. (The jumper wire arrangement, that used to be provided for the succeeding models to switch the DTR polarity is not used with these models.) To change the serial interface protocol, refer to Changing the serial interface configuration section which follows. A 25-pin D-sub connector is used for the serial interface. The extra signals used for RS-422A are assigned to these pins that are not used for RS-232C according to the IBM pin assignment scheme. Changing the serial interface configuration To change the serial interface protocol form RS-232C to RS-422A, or vice versa, the IB-10E board must be taken out from the printer. Protect the electronics by taking these precautions: CAUTION Before touching the main 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. Touch the main board only by the edge. FS-1050 C-7

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C-7
FS-1050
Serial interface (Optional)
The printer is equipped with an optional slot for adding a serial port. To add a serial port, the serial
interface board is equipped.
The device responsible for controlling the serial interface is integrated in the gate array in the
controller system. The serial interface supports both protocols of RS-232C and RS-422A.
Toggling the protocol between RS-232C and RS-422A is made by a shorting jumper socket that is
accessible on the main board. (The jumper wire arrangement, that used to be provided for the
succeeding models to switch the DTR polarity is not used with these models.) To change the serial
interface protocol, refer to
Changing the serial interface configuration
section which follows.
A 25-pin D-sub connector is used for the serial interface. The extra signals used for RS-422A are
assigned to these pins that are not used for RS-232C according to the IBM pin assignment scheme.
Changing the serial interface configuration
To change the serial interface protocol form RS-232C to RS-422A, or vice versa, the IB-10E board
must be taken out from the printer. Protect the electronics by taking these precautions:
CAUTION
Before touching the main 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.
Touch the main board only by the edge.