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Chapter 4 — Troubleshooting and Maintaining the CN2G
CN2G Handheld Computer User’s Manual 71
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.
There are three possible problems:
• 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 PSM files may not be correctly installed. For
help, see “Upgrading the Persistent Storage
Manager Files” on page 62.
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 15.
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 CN2G to use continuous/edge
triggering. If you configure the CN2G 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 will not read the bar code
label.
Make sure you aim the scanner beam so it crosses
the entire bar code label in one pass.
The angle you are scanning the bar code label may
not be working well, or you may be scanning the
label “straight on.” Try scanning the bar code label
again, but vary the scanning angle.
The bar code label print quality may be poor or
unreadable. To check the quality of the bar code
label, try scanning a bar code label that you know
will scan. Compare the two bar code labels to see if
the bar code quality is too low. You may need to
replace the label that you cannot scan.