C.2. RS-232C/RS-422A Interface

3. Pull the main circuit board all the way out of the printer.

☛ Before pulling the main board out, clean an area on the table, etc., at the back of the printer's rear panel. Foreign objects, accidentally sticking to the back of the main board, can cause serious damage to the printer.

Jumper Connector

Changing the Jumper Connector

1.Carefullyremovethe jumper connectorfrom the main circuit board, and reconnect to the pin

position shown in the diagram.

Jumper Connector

2.After completion of the above, return the main circuit board to the printer by reversing the procedure followed when removing it.

Verifying the Setting

The procedure described below should be followed to verify that the RS-422A mode had been correctly set. Print the service status page to verify that the RS-422A mode has been correctly set.

1.Make sure the power switch is off. Plug the power cord into the printer and turn power on.

2.If the printer is on-line, selectý!!3ULQW 6WDWXV SDJH in the Mode Select menu (refer to Mode Select Menu at the end of this document), and print the service status page.

3.Verify whether the setting is correct by checking the status printed at the bottom of the page. The fol- lowing sample indicates that "RS-422A" is set "RS4". If "RS-232C" is set, "RS2" appears.

[Printer Status Page]

Indicates the current serial interface mode.

C-6