Intermec CN2A, Руководство пользователя

Страница: 120 / 174

Chapter 5 — Troubleshooting and Maintaining the CN2A
104 CN2A Mobile Computer User’s Manual
Problems While Scanning Bar Codes
Problem Solution
You cannot see a red beam of light from
the scanner when you press the
Scan
button or one of the Side Scan buttons
and aim the scanner at a bar code label.
Try these possible solution in order:
• You may be too far away from the bar code label.
Try moving closer to the bar code label and scan it
again.
• You may be scanning the bar code label “straight
on.” Change the scanning angle and try again.
• The DOC files may not be correctly installed. You
should upgrade the DOC files. For help, see
“Upgrading the CN2A” on page 113.
• You can test the effective range of the scanner.
Move within 61 cm (2 ft) of a wall and test the
scanner. You need to be within the scanning range
to scan bar code labels. For help scanning bar
codes, see “Scanning Bar Codes” on page 22.
When you release the Scan button or
Side Scan button, the Good Read light
does not turn off.
The Good Read light will remain on if you configure
the CN2A to use continuous/edge triggering. If you
configure the CN2A for level triggering and the
Good Read light remains on, there may be a problem.
Press the
Scan button or one of the Side Scan
buttons again without scanning a bar code label. If
the light is still on, contact your local Intermec service
representative.
The scanner does not read the bar code
labels quickly, or the scanning beam
seems to be faint or obscured. The scanner window may be dirty. Clean the window
with a solution of ammonia and water. Wipe dry. Do
not allow abrasive material to touch the window.
You scan a valid bar code label to enter
data for your application. The data
decoded by the CN2A does not match
the data encoded in the bar code label. The computer may have decoded the bar code label
in a symbology other than the label’s actual
symbology. Try scanning the bar code label again.
Make sure you scan the entire label.
To operate the computer quickly and efficiently, you
should only enable the bar code symbologies that you
are going to scan.