Brother DS-820W Manuale Utente

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Troubleshooting 
63
11
Troubleshooting
Scanning difficulties
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.
The battery is low.
Connect the Micro USB Cable to your scanner and 
computer to charge the battery.
If you charge the scanner’s battery only a little from 
empty battery, you cannot use the scanner. Turn off 
the scanner until the battery is charged fully.
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 scanner is 
not calibrated correctly 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 
2. Calibrate your scanner again.
My scanned image is 
missing.
The Document Guides are not adjusted 
to fit the width of the document.
Adjust the Document Guide to fit the width of the 
document.
The settings are not suitable for your 
document. For example, a A4 docu-
ment was fed when Letter was selected 
as document size.
Make sure the document size settings are suitable 
for your document.
For Windows
®
For Macintosh: see Paper settings on page 36.
The scan speed is too 
slow.
The resolution is not suitable for your 
document.
Decrease the scanner resolution.
For Windows
®
For Macintosh: see Image settings on page 34.