Specifications

6–2
Maintenance and Troubleshooting
❖ Replacing the Interface Cable
The standard interface cable is attached to the 3400 with
an 8–pin modular connector. When properly seated, the
connector is held in the scanner handle by a flexible
retention tab. The cable’s designed to be field replaceable.
Notes:
• Order replacement cables from Welch Allyn or from an
authorized distributor.
• When ordering a replacement cable, specify the cable
part number of the original interface cable.
➊ Turn the power to the host system OFF.
To Replace the Interface Cable:
➋ Disconnect the scanner cable from the terminal or
computer.
➌ Locate the small hole on the side of the scanner
handle near the base (
see Figure below ).
➍ Straighten one end of a paper clip.
➎ Insert the end of the paper clip into
the small hole and press in. This
depresses the retention tab,
releasing the connector. Pull
the connector out of the
scanner handle while
maintaining pressure
on the paper clip.
➏ Replace with the new cable.
Insert the connector into the opening at the base of
the scanner handle. Press firmly. The connector is
“keyed” to go in only one way, and will click into place.
Cable
Release
❖ Examining the Scanner Housing
Routinely examine the 3400 housing for signs of damage.
A damaged housing may cause the internal components
to move and may result in a malfunctioning scanner.