Intermec EasyCoder 4420 User Manual page 57

EasyCoder 4420 and 4440 Bar Code Label Printer User's Manual
To check for communications problems
1 Check the cabling from the printer to the host system.
2 Check the communications interfacing of the devices connected to the
printer.
3 Check the printer for proper electrical operation of the I/O port.
4 Ensure the host system is not overrunning the printer input buffers.
5 Ensure the data string being sent to the printer contains the correct
information.
Chapter 4 — Troubleshooting the Printer
45