Epson CW3S16 Operation Manual page 216

Error Messages
Error - Time out!
l
Error - Break Detected
l
Error - Framing error
l
Error - Parity error
l
Error - Overrun error
l
If a time out error occurs during the send and receive portions,
this indicates a problem with the communication adapter
controller.
To perform the Serial Communication Port Test:
Highlight "Miscellaneous" in the main menu by using the left
and right arrow keys. Below this menu is another menu which
lists the two tests. "Printer Adapter Test" is highlighted with a
block cursor. To highlight "Comm. Adapter Test," use the
down arrow key. Press < ENTER > . The RS-232C Connector
Details Information box will appear. This box displays the
jumper settings. The message line at the bottom of the box will
prompt you for an answer to the following question:
Are the Pins Connected as Above? (Y/N)
The message box in the middle of the screen displays:
Checking Serial Port #l
Typing an "N" will return you to return to the main menu.
Typing a "Y" will initiate the test.
Advanced ROM Diagnostics E-53