Troubleshooting - Motorola SYMBOL LS7708 Product Reference Manual

3-6 Symbol LS7708 Product Reference Guide

Troubleshooting

Problem
The omni-line scan pattern does not
display when following the directions for
installing the host cable on page 1-5.
Scan line(s) display, but bar code cannot
be read.
Bar code is decoded, but not transmitted
to the host.
Scanned data is incorrectly displayed on
the host.
Although the green and red Power LEDs
are on, the scanner does not produce the
omni-directional scan pattern.
USB or Synapse host not functioning
properly.
An error occurs when connecting to a USB
host.
Handheld scanner does not power on.
Auxiliary RS-232 device data is not
received properly.
If after performing these checks the symbol still does not scan, contact the distributor or call the Global
Customer Interaction Center. See
Note
Possible Causes
No power to the scanner.
Interface cable is not properly connected.
Scanner is not programmed to read the bar
code type.
Bar code is damaged.
Bar code is too far from scanner.
The host has disabled scanning or
overridden parameter settings.
Scanner is not programmed for the correct
host type.
Scanner is not programmed to work with
the host. Check scanner host type
parameters or editing options.
Scanner has gone into Low Power "Motor
Sleep" Mode.
Scanner does not recognize host.
Cables were installed in the incorrect order. See
External power supply is not attached.
External power supply is not attached.
Auxiliary device supplies TTL level RS-232
signals.
Auxiliary settings are incorrect.
page xvi for contact information.
Possible Solutions
Ensure the host has power and is on. If the scanner uses a separate
power supply, ensure it's connected to a working AC outlet.
Check for loose cable connections.
Ensure scanner is programmed to read the bar code type being scanned.
Try scanning other bar codes of the same bar code type.
Move the bar code closer to the scanner.
See the technical person in charge of scanning.
Scan the appropriate host type bar code.
• Ensure proper host is selected.
• For RS-232, ensure the scanner's communication parameters match
the host's settings.
• For keyboard wedge, ensure scanner is programmed with the correct
country code and that the CAPS LOCK key is off.
• Ensure editing options (e.g., UPCE-to-UPCA Conversion) are properly
programmed.
Press the Volume Control & Wakeup button to awaken the scanner.
Remove and reinsert external power supply to force cable to autodetect
correct host.
Connecting the Host and Peripheral Cables on page 1-6
correct order of insertion.
Connect an external power supply directly to the scanner, not to the host
cable.
Connect an external power supply directly to the scanner, not to the host
cable.
Use a device that supports standard RS-232 signal levels.
Use auxiliary RS-232 port settings, not the RS-232 host settings.
for the