Denso QB30-SR, Руководство пользователя

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Chapter 19 Troubleshooting
Problem 1: Low reading efficiency.
Probable cause What to do:

A target code is not within the scan range of the
reading window.

Bring a code within the scan range.

The code may be smeared.

Wipe off the dirt from the code.

The code may be blurred.

Use a code clearly printed.
Problem 2: Cannot read 2D codes or bar codes.
Probable cause What to do:

The type of the code to be scanned has not been set as
a readable code.

Enable the type of the code to be scanned as a readable
code.

The scanned bar code contains no check digit, while
the "Enable, with a check digit" parameter is selected.

Select the "Enable, without a check digit" parameter.

The check digit contained in the scanned bar code is
wrong.

Use a correct bar code.
Problem 3: Code data cannot be displayed normally on the computer screen. (USB-COM interface)
Probable cause What to do:

The communications conditions of the scanner are
different from those of the connected host.

Change the communications conditions of the scanner to
match those of the connected host.

Any device driver other than our Active USB-COM
port driver may be used.

Use our Active USB-COM port driver that is designed
for the USB-COM interface.
Problem 4: Code data cannot be displayed normally on the computer screen. (USB keyboard interface)
Probable cause What to do:

The keyboard type selected may not match one that is
set up in the host computer.

Select the same keyboard type as one that is set up in the
host computer.
(You can check the computer's keyboard type by
clicking
My Computer
|
Control Panel
|
Keyboard
|
Hardware
.)

The Caps Lock state selected may not match that of the
connected keyboard.

Select the same Caps Lock state as that of the connected
keyboard.

Any device driver other than the system-supplied
driver (USB device class driver for HID) may be used.

Use the system-supplied driver.

The computer's keyboard may be held down.

Do not press the computer's keyboard when scanning
codes.
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