Zebra Technologies Corporation MD-QL3021 用户手册

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QL 420 User’s Guide

Before you connect the printer to your computer or portable

data terminal, make sure that the printer is in proper working or-
der.  You can do this by printing a configuration label using the
“two key reset” method.  If you can’t get this label to print, refer to
“Troubleshooting”.

1. Turn the printer off.  Load the media compartment with

journal media (media with no black bars printed on the
back)

2. Press and hold the Feed Button.
3. Press and release the Power button and keep the Feed

button pressed.  When printing starts, release the Feed
button.

 The unit will print a  line of interlocking “x” characters to en-

sure all elements of the print head are working, print out the ver-
sion of software loaded in the printer and then print two reports.

The first report indicates model, ROM version, serial number,

baud rate, etc.    The second report prints out more detailed in-
formation on the printer’s configuration and parameter settings.
If no second report appears, there is no application loaded. (See
the Troubleshooting Section for a sample print-out and a further
discission on how to use the configuration label as a diagnostic
tool.)

The printer must establish communications with a host terminal

which sends the data to be printed.  Communications occur in
four basic ways:

• By a cable between the printer and its host terminal
• Linking to a host terminal via Infrared (usually by means of

the industry standard IrDA protocol)

• By means of a Bluetooth™ short range radio frequency

link.

• By means of a wireless LAN (Local Area Network) per

802.11b specifications.