Intermec EasyCoder 7421, User Manual, Page: 66 / 100

4-8
Your printer uses XON/XOFF protocol for software
handshaking. When the input buffer is full, the printer transmits
an XOFF character. This action alerts the host to the fact that the
printer buffer is full and cannot receive any more data. When the
printer is ready to receive more data, it sends the XON character.
To check for communications problems
1. Check the cabling from the printer to the host system.
2. Check the interfacing of the devices that are communicating
with the printer.
3. Check the printer for proper electrical operation of the I/O
port.
4. Test to see that the host system is not overrunning the
printer’s input buffer.
5. Check to see that the data string being sent to the printer
contains the correct information.
Resetting the Printer to Factory Defaults
Use memory reset if you want to return the printer to its default
configuration.
To reset the printer to factory defaults
1. Turn off the printer.
2. Lift the printhead and remove all label stock from the paper
path.
3. Turn the printer on while holding down the Feed/Pause
button.
4. When the print mechanism starts to move, release the
Feed/Pause button and press it again. The Power light
should now be flashing red.
5. Press and hold the Feed/Pause button down for 8 seconds or
until the Power light stops flashing. The printer resets all
parameters to their factory default settings.