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B
Troubleshooting B
If you think there is a problem with your machine, check the chart below and follow the troubleshooting tips.Most problems can be easily resolved by yourself. If you ne ed additional help, the Brother Solutions Center offers the latest FAQs and troubleshooting tips. Visit us at http://solutions.brother.com.
If you are having difficulty with your machine B

Troubleshooting and Routine

Maintenance B
Printing
Difficulty Suggestions
No printout Check the interface cable or wireless connection on both the machine and your
computer. (See the Quick Setup Guide.)
Make sure the machine is plugged in and not turned off.
One or more ink cartri dges are empty.
(See Replacing the ink car tridges on page70.)
Check to see if the LCD is showing an error m essage.
(See Error messages onpage 66.)
Check that the correct printer driver has been installed and chosen.
Make sure that the machine is online. Click Start and then Printers and Faxes.
Right-click and choose Brother DCP-770CW, an d make sure that Use Printer
Offline is unchecked.
Poor print quality Check the print quality. (See Checking the print quality onpage 76.)
Make sure that the Media Type setting in the printer driver or the Paper Type
setting in the machine ’s menu matches th e type of paper you are using.
(See Printing for Windows® or Printing and Faxing for Macintosh® in the Software
User's Guide on the CD-ROM.)
Make sure that your ink cartridges are fresh. The following may cause ink to clog:
The expiration date written on the cartridge package has passed.
(Cartridges stay usable for up to two years if kept in their original packaging.)
The ink cartridge was in your machine over six months.
The ink cartridge may not have been stored properly before use.
Try using the recommended type s of paper. (See Acceptable paper and other
media on page10.)
The recommended environment for your machine is between 20°C to 33°C.
White horizontal lines appear in text
or graphics.
Clean the print head. (See Cleaning the print head onpage 7 5.)
Try using the recommended type s of paper. (See Acceptable paper and other
media on page10.)
If you want to print on Photo L or 10 × 15 cm paper, make sure you use the photo
paper tray. (See Loadin g photo paper on page 17.)
The machine prints bla nk pages. Cle an the print head. ( See Cleaning the print head onpage 75.)