There is a red LED and a green LED on IS6520/MS6520. When the scanner is
on, the flashing or stationary, activity of the LEDs indicates the status of the
current scan and the scanner.
No Red or Green LED
The LEDs will not be illuminated if the scanner is not receiving
power from the host or transformer.
When the laser is active, the green LED is illuminated. The
green LED will remain illuminated until the laser is deactivated.
During the power save mode, the laser will turn on and turn off.
During this period, the green LED remains illuminated.
Steady Green and Single Red Flash
When the scanner successfully reads a bar code, the red LED
will flash and the scanner will beep once. If the red LED does not
flash or the scanner does not beep once, then the bar code has
not been successfully read.
Steady Green and Steady Red
After a successful scan, the scanner transmits the data to the
host device. Some communication modes require that the host
inform the scanner when data is ready to be received. If the host
is not ready to accept the information, the scanner's red LED will
remain on until the data can be transmitted.
Steady Green and Flashing Red
This indicates the scanner is in program mode. A razzberry tone
indicates that an invalid bar code has been scanned in this mode.
Steady Red, Green Off
This indicates the scanner may be waiting for communication
from the host.