TROUBLESHOOTING GUIDE (CONTINUED)

SYMPTOMS

POSSIBLE CAUSE(S)

SOLUTION

 

 

 

 

 

 

 

Scanning a particular

UPC/EAN, Code 39, interleaved

 

2 of 5, Code 93, Code 128 and

 

symbology that is not

Codabar are enabled by default.

 

enabled.

Verify that the type of bar code

The unit powers

 

being read has been selected.

 

 

 

 

up, but does

The scanner has been

Verify that the bar code that is

not scan and/or

programmed for a

being scanned falls into the

beep.

character length lock,

criteria.

or a minimum length

 

(Typical of Non-UPC/EAN

 

and bar code being

 

codes. The scanner defaults to

 

scanned does not

 

a minimum of 4 character bar

 

satisfy the

 

code.)

 

programmed criteria.

 

 

 

 

 

 

 

 

The unit scans

The scanner is

If the scanner is setup to support

a bar code, but

ACK/NAK, RTS/CTS,

configured to support

locks up after

XON/XOFF or D/E, verify that

some form of host

the first scan

the host cable and host are

handshaking but is not

(red LED stays

supporting the handshaking

receiving the signal.

on).

properly.

 

 

 

 

 

 

 

The unit scans,

The scanner’s data

Verify that the scanner’s data

but the data

format matches that required by

format does not match

transmitted to

the host. Make sure that the

the host system

the host is

scanner is connected to the

requirements.

incorrect.

proper host port.

 

 

 

 

 

 

 

Scanner beeps at some bar codes and NOT for others of the same bar code symbology.

The print quality of the bar code is suspect.

Also check character length lock.

The aspect ratio of the bar code is out of tolerance.

Check print mode. The type of printer could be the problem. Change print settings. For example change to econo mode or high speed.

31

Page 34
Image 34
Metrologic Instruments MS7620 manual Codes. The scanner defaults to