Zebra Technologies Corporation MD-BTC2TY 用户手册
38
QL 420 User’s Guide
Troubleshooting
Standard Control Panel
If the printer is not functioning properly, refer to the chart below
to find the state of the two LEDs on the Control Panel. Then re-
fer to the Troubleshooting topic referenced in the chart to resolve
the problem.
fer to the Troubleshooting topic referenced in the chart to resolve
the problem.
Green LED
Yellow LED
Indication
Ref. to Topic
Steady
Off
Normal Operation,
n/a
and/or RF Link established
Off
Off
Power Off
1
Fast Blink
Off
No RF Link
6, 11
Slow Blink
Off
Low Battery
3, 6, 7
Steady
Steady
Out of media, or
9, 11
Media Cover not closed
Steady
Fast Blink
Normal RF activity
8
Steady
Fast Blink,
No application
8
Beeper Sounds
Optional LCD Control Panel
The top of the display shows several icons which indicate vari-
ous printer functions. Check the indicator status, then refer to the
Troubleshooting topic referenced in the chart to resolve the prob-
lem.
Troubleshooting topic referenced in the chart to resolve the prob-
lem.
Status Icon
Condition
Indication
Ref. to Topic
Steady
RF Link established
n/a
Off
No RF Link
6
Flashing
Low Battery
3, 6, 7
Flashing
Head latch not closed
9, 11
Flashing
Printer is receiving a file
8
Flashing
Out of media,
9, 11
Blank Screen
n/a
No application
1,13