Zebra Technologies Corporation MD-BTC2TY 用户手册
QL 420 User’s Guide
17
• Printers with a wireless QuickLink module installed: a rap-
idly blinking LED indicates normal data transmission.
• A steadily lit yellow LED indicates an error condition. This
can be caused by one of the following:
1. The media cover is not completely closed and latched.
2. The printer is out of media.
1. The media cover is not completely closed and latched.
2. The printer is out of media.
continued
F
IGURE
9: S
TANDARD
C
ONTROL
PANEL
Green LED
Steady Light indicates power on
and/or established RF link.
and/or established RF link.
Fast Blink indicates no RF link (on
RF equipped units only)
RF equipped units only)
Slow Blink means low battery
Yellow LED
Steady Light indicates error
condition: out of media or
media cover not closed.
condition: out of media or
media cover not closed.
Fast Blink indicates RF activi-
ty (on RF equipped units
only)
ty (on RF equipped units
only)
Fast blink with beeper indi-
cates no application loaded
cates no application loaded
Power Button
Press to turn unit
on. Press again to
turn unit off
on. Press again to
turn unit off
Feed Button
Press to advance the me-
dia one blank label or a
software determined length
of journal media.
dia one blank label or a
software determined length
of journal media.
Function Button
Specific functions are under
printer application control.
printer application control.