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Appendix II Troubleshootin
OUT OF SCANNING RANGE
Try adjusting the scanning distance from the scanner to the barcode.
CANNOT TRANSMIT/RECEIVE DATA
USING RS-232 CABLE
Check if the RS-232 connection is correct and secured.
Make sure the serial port parameters on the host are configured to match the serial
parameters on the mobile computer. Try to establish connection again.
If the problem persists, run the Echo Test to check if the RS-232 interface between
the mobile computer and the host is working. (See
3.3.6 Echo Test.)
USING USB CABLE
Check if the USB connection is correct and secured.
Check if the USB driver has been installed. Driver version 5.3 or later is required.
If the problem persists, run the Echo Test to check if the USB interface between the
mobile computer and the host is working. (See
3.3.6 Echo Test.)
Note: (1) If you are using USB Virtual COM for the first time, you must install its driver
from the CD-ROM. Driver version 5.3 or later is required. Please remove older
versions! The virtual COM port will not be assigned until the USB port is in use.
(2) For Standard USB cable, it will release COM port in the following conditions: (i)
detach the cable from the mobile computer directly, (ii) detach the cable from the
cradle directly, (iii) when the cable is attached to the cradle, take away the mobile
computer, (iv) the mobile computer is turned off, (v) no application is running on
the mobile computer, or COM port is shut down. For applications that require COM
port to be occupied all the time, it is suggested to use 308 USB Virtual COM
Interface cable instead.
VIA BLUETOOTH
Make sure the distance between the mobile computer and a target device is within
proper range. Try to establish connection again.
Check if the relevant settings are correct. (See 3.7 Bluetooth Menu.)
If the problem persists, run the Echo Test to check if the connection is working
properly. (See
3.7.4 Echo Tests.)
VIA WI-FI
Make sure the mobile computer is connected to an access point properly, under the
same SSID. Try to establish connection again.
Check if the relevant settings are correct. (See 3.11 Wi-Fi Menu.)
If the problem persists, run the Echo Test to check if the connection is working
properly. (See
3.11.5 Echo Tests.)
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