Maintenance & Troubleshooting 8 - 7
Bluetooth Connection
The MC75A does not 
accept data capture 
input.
Scanning 
application is not 
loaded.
Load a scanning application on the MC75A. See the system 
administrator.
Unreadable bar 
code.
Ensure the symbol is not defaced.
Distance between 
exit window and bar 
code is incorrect.
Place the MC75A within proper scanning range.
MC75A is not 
programmed for the 
bar code.
Program the MC75A to accept the type of bar code being scanned. 
MC75A is not 
programmed to 
generate a beep.
If the MC75A does not beep on a good decode, set the application 
to generate a beep on good decode.
Battery is low. If the scanner stops emitting a laser beam upon a trigger press, 
check the battery level. When the battery is low, the scanner shuts 
off before the MC75A low battery condition notification. Note: If the 
scanner is still not reading symbols, contact the distributor or Zebra.
Table 8-1    
Troubleshooting the MC75A (Continued)
Problem Cause Solution
Table 8-2    
Troubleshooting Bluetooth Connection
Problem Cause Solution
MC75A cannot find 
any Bluetooth devices 
nearby.
Too far from other 
Bluetooth devices.
Move closer to the other Bluetooth device(s), within a range of 10 
meters.
The Bluetooth 
device(s) nearby are 
not turned on.
Turn on the Bluetooth device(s).
The Bluetooth 
device(s) are not in 
discoverable mode.
Set the Bluetooth device(s) to discoverable mode. If needed, refer to 
the device’s user documentation for help.