Epson LQ-950 User Manual - Page 270

Problem Using an optional interface, the printer does not operate properly (continued). The printer does not print or the printout is not what you expected (continued). Solution You may be trying to use an interface with the wrong specification. Check the specifications to make sure that you can use the interface with this printer. See Chapter 5. The DIP switch settings may not be set correctly. Make sure that DIP switches 2-3 and 2-4 are set for parallel, regardless of whether the optional interface board is parallel or serial. See Chapter 3. You can also check the current DIP switch settings by running the self test. You may be trying to use a cable with the wrong specification. Make sure that the cable matches the specifications of the interface. The DIP switches or jumpers on the interface board may be set wrong. See the interface manual for the correct settings. The interface settings on the computer may be wrong. See your computer manual for the correct settings. The computer and interface settings may not match. Match the settings for each condition. 7-36 Troubleshooting