3.Press the FEED key. The printer will print: “Entering DUMP mode.”

NOTE: If the FEED key is not pressed within 3 seconds, the printer will print “DUMP mode not entered” and will resume normal operation.

4.At this point, the printer is in DUMP mode and will print the ASCII hex codes of any data sent to it, and their text representation (or “.” if not a printable character).

Additionally, a file with a “.dmp” extension containing the ASCII information will be created and stored in the printer’s memory. It can be viewed, “cloned” or deleted using the Label Vista application. (Refer the Label Vista documentation for more information.)

To terminate the Communications Diagnostics Mode and return the printer to normal operations:

1.Turn the printer OFF.2.Wait 5 seconds.3.Turn the printer ON.Calling Technical Support

If the printer fails to print the configuration label, or you encounter problems not covered in the Troubleshooting Guide, contact Zebra Technical Support. Technical Support addresses and phone numbers for your area can be found in Appendix D of this manual. You will need to supply the following information:

•Model number/type (e.g. RW 420)

•Unit serial number (14 digit number, including dashes) The serial number is found on the large label on the back of the printer. It is also reported in the configuration label printout. (Refer to Figures 23 through 23b.)

•Product Configuration Code (PCC) (15 digit number, in- cluding dashes). The PCC number for an RW 420 Printer will begin with “RW4” and is printed above the unit serial number on the back of the unit.

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RW 420 User Guide