Troubleshooting – Brother DS-720D User Manual
Page 50
Troubleshooting
45
8
Troubleshooting
Scanning difficulties
Calibration failed. Please reboot the
machine.
The calibration failed for some rea-
son. For example, the Calibration
Sheet is not inserted in the correct di-
rection.
Remove the Micro USB Cable
from your computer. Reconnect
the Micro USB Cable to the com-
puter, and perform the calibration
again.
Insert the Calibration Sheet in the
correct direction.
• For Windows
®
: to perform the cal-
ibration using software, see Cali-
bration using software (for
Windows
• For Macintosh: to perform the cal-
ibration using software, see Cali-
bration using software (for
Macintosh) on page 40.
Difficulty
Cause
Suggestions
My scanner does not
turn on.
The supplied Micro USB Cable is not
connected securely.
Make sure the Micro USB Cable is securely con-
nected to your scanner and computer.
My computer does not
recognize the scanner
when it is connected
via the Micro USB
Cable.
Causes may vary.
Make sure the Micro USB Cable is securely con-
nected to your scanner and computer. Remove the
Micro USB Cable and reconnect the Micro USB
Cable to your scanner and computer.
My scanned images
have black lines run-
ning through them,
blank spaces, or are of
overall bad quality.
This problem occurs if the image quality
between your scanner and computer is
not balanced or if a foreign object, such
as a paper clip or ripped paper, is stuck
in the scanner.
1. Check the document feeder slot and make sure
that the slot is clear. If foreign objects are found,
remove them from your scanner.
2. Calibrate your scanner (see Scanner Calibration
If scan quality is not improved after you calibrate
your scanner:
1. Clean the scanner (see Scanner Maintenance on
page 42).
2. Calibrate your scanner again.
Error message
Cause
Action