17
SCANNER OPERATION
The MS1690 series scanner has three LED indicators
(yellow, white and blue) located on the top of the scanner.
When the scanner is on, the flashing or stationary activity of
the LEDs indicates the status of the current scan and the
scanner.
No LEDs are Illuminated
The LEDs will not be illuminated if the scanner is not
receiving power from the host or transformer.
The scanner is in stand-by mode. Present a bar code to
the scanner and the blue LED will turn on when the IR
detects the object.
Steady Yellow
The yellow LED is illuminated when the scanner is in the stand.
Steady Blue
The blue LED is illuminated when the scanner is active and linear illumination
is on or when the scanner is attempting to decode a bar code.
Steady Blue and Single White Flash
When the scanner successfully reads a bar code it will beep once and the
white LED will turn on indicating data is being transmitted.
If the scanner does not beep once and the white light does not turn on, then
the bar code has not been successfully read.
Steady White
When the scanner successfully reads a bar code it will beep once and the
white LED will turn on indicating data is being transmitted.
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 white LED will remain on until the
data can be transmitted.
Alternating Flashing of Blue and White
This indicates the scanner is in configuration mode. A short razzberry tone
indicates that an invalid bar code has been scanned while in this mode.
Flashing Blue
The blue LED will flash if the trigger is pressed while the scanner is in the
in-stand presentation mode. The blue LED will stop flashing after a brief
period of time.
Figure 15.