Honeywell MS3780 Fusion Setup/Service Instructions page 14

Fusion Scanner
Troubleshooting Guide
The following guide is for reference purposes only. Contact a Honeywell representative at 
1-800-ID-METRO or 1-800-436-3876 to preserve the limited warranty terms.
Symptoms
All Interfaces
The unit has no LEDs, beeper or
motor spin.
The unit has no LEDs and/or
beeper.
There are multiple scans upon
presentation of code.
The unit powers up but does not
beep.
The unit powers up but does not
scan and/or beep.
The unit scans a barcode, but
locks up after the first scan (the
white LED stays on).
The unit scans but the data
transmitted to the host is
incorrect.
Scanner beeps at some
barcodes and NOT for others of
the same barcode symbology.
During power up, the unit beeps
three times.
During power up, the unit razzes
continuously.
During power up, the unit razzes
once and the blue LED flashes.
During power up, the unit razzes
twice and both LEDs flash.
RS-232 Only
The unit powers up and scans
correctly, but does not
communicate properly to the
host.
The host is receiving data but it
does not appear to be correct.
Characters are being dropped.
Page 14
Possible Cause(s)
No power is being supplied to the
scanner.
No power is being supplied to the
scanner from the host.
The same symbol timeout is set too
short.
The beeper is disabled.
No tone is selected.
The unit is trying to scan a particular
symbology that is not enabled.
The scanner has been configured for a
character length lock, or a minimum
length, and barcode being scanned
does not satisfy the configured criteria.
The scanner is configured to support
some form of host handshaking but is
not receiving the signal.
The scanner's data format does not
match the host system requirements.
The print quality of the barcode is
suspect.
The aspect ratio of the barcode is out
of tolerance.
The barcode may have been printed
incorrectly.
The scanner is not configured
correctly for the type of barcode.
The minimum symbol length setting
does not work with the barcode.
There is a non-volatile Random
Access Memory (RAM) failure.
There is a RAM or Read Only Memory
(ROM) failure.
There is a Visible Laser Diode (VLD)
failure.
There is a scanner motor failure.
The COM at the host is not working or
is not configured properly.
The cable is not connected to the
proper COM port.
The COM port is not operating
properly.
The scanner and host may not be
configured for the same interface.
The inter-character delay needs to be
added to the transmitted output.
MDE-4636C Honeywell® MS3780 Fusion Scanner Setup/Service Instructions · July 2021
Solution
Check the transformer, outlet, and power strip. Ensure that the
cable is plugged into the scanner.
Some host systems cannot supply enough current to power the
Fusion Scanner. Use the power supply included with the scanner.
Adjust the same symbol timeout for a longer time increment.
Enable the beeper.
Select a tone.
UPC/EAN, Code 39, Interleaved 2 to 5, Code 93, Code 128, and
Codabar are enabled by default. Verify if the type of barcode
being read has been selected.
Verify if the barcode that is being scanned falls into the criteria.
Note: Typical of non-UPC/EAN codes. The scanner defaults to a
minimum of 4-character barcode.
If the scanner is setup to support ACK/NAK, RTS/CTS, XON/
XOFF or D/E, verify if the host cable and host are supporting the
handshaking properly.
Verify if the scanner's data format matches the format required by
the host. Ensure that the scanner is connected to the proper host
port.
The type of printer and/or the printer settings could be the
problem.
Check the print mode or change the printer settings. For
example, change to econo mode or high speed.
Check if it is a check digit, character, or border problem.
Check if check digits are set properly.
Check if the correct minimum symbol length is set.
Replace the scanner.
Replace the scanner.
Replace the scanner.
Replace the scanner.
Check to ensure that the baud rate and parity of the scanner and
the communication port match and that the program is looking for
RS-232 data.
Check if the scanner and the host are configured for the same
interface.
Add some inter-character delay to the transmitted output by using
the "MetroSelect Configuration Guide (MLPN 00-02407)".