Maintenance and Technical Specifications
3-3
Introduction
This chapter provides suggested scanner maintenance, troubleshooting, technical specifications, and signal descriptions (pinouts).
Maintenance
Cleaning the scan window is the only maintenance required. A dirty window can affect scanning accuracy.
•
Do not allow abrasive material to touch the window.
•
Remove any dirt particles with a damp cloth.
•
Wipe the window using a tissue moistened with ammonia/water.
•
Do not spray water or other cleaning liquids directly into the window.
Troubleshooting
Table 3-1. Troubleshooting
Problem
Possible Causes
Possible Solutions
The aiming pattern does not appear when pressing
the trigger.
No power to the digital scanner.
If the configuration requires a power supply,
re-connect the power supply.
Incorrect host interface cable is used.
Connect the correct host interface cable.
Interface/power cables are loose.
Re-connect cables.
Digital scanner is disabled.
For Synapse or IBM 468x mode, enable the digital
scanner via the host interface. Otherwise, see the
technical person in charge of scanning.
If using RS-232 Nixdorf B mode, CTS is not asserted. Assert CTS line.
Aiming pattern is disabled.
Enable the aiming pattern. See
Scanner emits short low/short medium/short high
beep sequence (power-up beep sequence) more than
once.
The USB bus may put the digital scanner in a state
where power to the digital scanner is cycled on and
off more than once.
Normal during host reset.
Digital scanner emits aiming pattern, but does not
decode the bar code.
Digital scanner is not programmed for the correct bar
code type.
Program the digital scanner to read that type of bar
code. See
.
Bar code symbol is unreadable.
Scan test symbols of the same bar code type to
determine if the bar code is defaced.
The symbol is not completely inside aiming pattern. Move the symbol completely within the aiming
pattern.
Digital scanner emits 4 short high beeps during
decode attempt.
Digital scanner has not completed USB initialization. Wait several seconds and scan again.
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