Zebra Technologies Corporation MD-QL3021 Benutzerhandbuch

QL 420 User’s Guide

15

The QL 420 will come with one of two possible control panels.

The standard control panel is detailed below and in Figure 9.
The optional control panel (Figure 10)  features an LCD which
allows easy display and selection of many printer functions  de-
tailed on following pages.

The standard keypad has three control buttons and two multi-

purpose indicators.

• The Power button turns the QL 420 on and off.
• The Feed button advances a length of media which is de-

termined by the type of media being used.  Label media
will be advanced to the next gap or bar sense marker.
Journal (plain) media will be advanced a length deter-
mined by the printer’s software.

• The Function button is controlled by a printer’s specific ap-

plication to support such functions as:

Print a battery level report.
Print the Local Area Network (LAN) status
Print a Short Range Radio Frequency (SRRF) status
Print a media supply report

The green LED on the left side of the control panel indicates

the status of several printer features:

• A slowly blinking sequence indicates the printer’s battery

needs charging.

• Printers with a wireless QuickLink module installed: a

quickly blinking sequence indicates the printer has not es-
tablished a link to either a Local Area Network  or a com-
patible wireless equipped terminal.

• Printers with a wireless QuickLink module installed: A

steadily lit indicator shows that the printer has established
a wireless link, either to the LAN or to a compatible termi-
nal.
A steadily lit green indicator on a non-wireless printer is a
power-on indicator.

The yellow LED on the right side of the control panel has two

indication conditions.

• A rapidly blinking yellow LED and a chime indicate that no

application has been loaded into the printer.