Metrologic Instruments MS2421 - Manual (Page 34)

30
S CANNER O PERATION
I NDICATOR D ESCRIPTIONS
Visual
Steady Blue
When all lasers are active, the blue LED is illuminated. The blue LED will remain illuminated until all lasers are deactivated.
Steady Blue and Single blue Flash
When the scanner successfully reads a bar code, the blue LED will flash and the scanner will beep once. If the blue LED
does not flash or the scanner does not beep once, then the bar code has not been successfully read.
Blue LED Off
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
blue LED will remain off until the data can be transmitted.
or
This indicates the scanner may be waiting for communication from the host.
Flashing Blue
This indicates the scanner is in program mode. A razzberry tone indicates that an invalid bar code has been scanned
in this mode.
or
If the unit is in sleep mode, the blue LED will flash once every 15 seconds.
or
This indicates there is an error active on the diagnostic indicator display (see Error Codes on page 31).
The scanner may continue to operate depending on the type of error.
Failure Modes
Flashing Blue and One Razzberry Tone
This indicates that the scanner has experienced a laser subsystem failure. The scanner will try up to 3 times to correct the
failure condition. If the laser subsystem continues to fail, that subsystem (horizontal or vertical) will be shut down and an
error indication will be shown on the Diagnostic Indicator Display. This error stays on the display until corrected. If the
remaining subsystem is still operational, scanning will continue using the operational components.
Flashing Blue and Two Razzberry Tones
This indicates that the scanner has experienced a motor subsystem failure. The scanner will try up to 3 times to correct the
failure condition. If the motor subsystem continues to fail, that subsystem (horizontal or vertical) will be shut down and an
error indication will be shown on the Diagnostic Indicator Display. This error stays on the display until corrected. If the
remaining subsystem is still operational, scanning will continue using the still operational components.
Continuous Razzberry Tone with Blue LED Off
If, upon power up, the scanner emits a continuous razzberry tone, then the scanner has an electronic failure. Return the unit
for repair at an authorized service center.
Three Beeps - On Power Up
If the scanner beeps 3 times on power up then, the nonvolatile memory that holds the scanner configuration has failed.
Return the unit for repair at an authorized service center.