|Did you check Device Manager? If in fact the manual doesn't address the port settings or cable type you might contact epson. |
Are you using a standard computer or a Point of sale machine?
Below is from the link that guapo provided.
"10. Why is my printer not printing in parallel mode?
Answer: When installing a TM printer with a parallel interface, if the printer prints garbage, stops printing in the middle of the print job or doesn't print at all, try changing the parallel port mode in the computers BIOS from ECP to Standard or Standard Bi-Directional.