Symbol LS4278 Product Reference Guide
2-4
LED Definitions
In addition to beeper sequences, the scanner communicates with the user using a two-color LED display.
defines LED colors
that display during scanning.
Three long high beeps
Code 39 buffer is full.
Low/high/low beeps
The Code 39 buffer was erased or there was an attempt to clear or transmit an empty buffer.
Low/high beeps
A successful transmission of buffered data.
Host Specific
USB only
Four high beeps
Scanner has not completed initialization. Wait several seconds and scan again.
Scanner gives a power-up beep after scanning a USB Device
Type.
Communication with the bus must be established before the scanner can operate at the highest
power level.
This power-up beep occurs more than once.
The USB bus may put the scanner in a state where power to the scanner is cycled on and off more
than once. This is normal and usually happens when the host PC
cold boots.
RS-232 only
High beep
A <BEL> character is received and Beep on <BEL> is enabled (Point-to-Point mode only).
Table 2-2. Standard LED Definitions
Scanning LED
Indication
Green Flash
A bar code was successfully decoded.
Charging LED
Indication
Green - Slow Continuous Flash
1
Non-critical battery temperature fault. Battery is above or below normal operating temperature.
If this occurs, do not use the scanner and move the scanner to a location within normal operating
temperature. The scanner can remain in the cradle while the battery warms or cools to normal operating
temperature.
Note: For appropriate charging temperatures, see
.
Green - Fast Continuous Flash
2
Scanner is charging.
Green - Solid
Scanner is fully charged.
Amber - Continuous Flash
Critical battery temperature fault. Battery is above or below normal operating temperature.
If this occurs, do not use the scanner and move the scanner to a location within normal operating
temperature. The scanner can remain in the cradle while the battery warms or cools to normal operating
temperature.
Note: For appropriate charging temperatures, see
.
1
A slow continuous flash is estimated at 1 flash per second.
2
A fast continuous flash is estimated at 2 flashes per second.
Table 2-1. Standard Beeper Definitions (Continued)
Beeper Sequence
Indication
Summary of Contents for STB4278
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