Brother Mfc 790cw User Manual

Troubleshooting and Routine Maintenance145
B
Poor print quality Check the print quality. (See  Checking the print quality on page 166.) 
Make sure that the Media Type setting in the printer driver or the Paper Type 
setting in the machine’s menu matches the 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 and  Paper Type  on page 25.) 
Make sure that your ink cartridges are fresh. The following may cause...

146
The printouts are wrinkled. In the printer driver Advanced tab, click Color Settings , and uncheck 
Bi-Directional Printing  for Windows®
 or  Bi-Directional Printing  for 
Macintosh ®
.
Make sure you are using Genuine Brother Innobella™ Ink.
Cannot perform ‘Page Layout’ 
printing. Check that the paper size setting in the application and in the printer driver are the 
same.
Print speed is too slow.  Try changing the printer driver setting. The highest resolution needs longer data  processing,...

Troubleshooting and Routine Maintenance147
B
Telephone Line or Connections
DifficultySuggestions
Dialing does not work. (No dial 
tone) Check that the machine is plugged in and that the 
On/Off key is on.
Check all line cord connections. Make sure the telephone line cord is plugged into 
the telephone wall jack and the LINE jack of the machine.
(Canada only) Change Tone/Pulse setting. (See the  Quick Setup Guide.)
Verify that the telephone line and jack are working by connecting a known working...

148
Poor fax send quality. Try changing your resolution to Fine or S.Fine . Make a copy to check your 
machines scanner operation. If the copy quality is not good, clean the scanner. 
(See  Cleaning the scanner  on page 164.)
Vertical  black  lines  when  sending. Black vertical lines on faxes you send are typically caused by dirt or correction fluid  on the glass strip. Clean the glass strip. (See  Cleaning the scanner on page 164.)
Handling Incoming Calls
DifficultySuggestions
The machine ‘Hears’ a...

Troubleshooting and Routine Maintenance149
B
OCR does not work. Try increasing the scanner resolution.
Software Difficulties
DifficultySuggestions
Cannot install software or print. Run the  Repair MFL-Pro Suite program on the CD-ROM. This program will repair 
and reinstall the software.
‘Device Busy’  Make sure the machine is not showing an error message on the LCD.
Cannot print images from 
FaceFilter Studio.  To use FaceFilter Studio, you must install the FaceFilter Studio application from 
the CD-ROM...

150
Network Difficulties
DifficultySuggestions
Cannot print over the Network. Make sure that your machine is powered on and is online and in Ready mode.  Print a Network Configuration list (see  Reports on page 89.) and check the current 
Network settings printed in this list. Reconnect the LAN cable to the hub to verify 
that the cabling and network connections are good. If possible, try connecting the 
machine to a different port on your hub using a different cable. If the connections 
are good, the...

Troubleshooting and Routine Maintenance151
B
Dial Tone B
Setting the dial tone to Detection will shorten 
the dial detect pause.
aPress MENU.
bPress  aor b to display 
Initial Setup .
cPress Initial Setup .
dPress aor b to display  Dial Tone .
ePress Dial Tone .
fPress Detection  or No Detection .
gPress Stop/Exit .
Telephone line interferenceB
If you are having problems sending or 
receiving a fax due to possible interference 
on the telephone line, we recommend that 
you adjust the Equalization for...

152
Error and Maintenance messagesB
As with any sophisticated office product, errors may occur and consumable items may need to be 
replaced. If this happens, your machine identifies the error and shows an error message. The 
most common error and maintenance messages are shown below.
You can correct most errors and routine maintenance messages by yourself. If you need more 
help, the Brother Solutions Center offers the latest FAQs and troubleshooting tips.
Visit us at http://solutions.brother.com
....

Troubleshooting and Routine Maintenance153
B
Cannot DetectYou installed a new ink cartridge 
too quickly and the machine did 
not detect it. Take out the new ink cartridge and 
re-install it slowly until it clicks.
If you are not using genuine 
Brother Innobella™ ink the 
machine may not detect the ink 
cartridge. Use a new Genuine Brother Innobella™ 
Ink Cartridge. If the error is not cleared, call 
Brother Customer Service.
An ink cartridge is not installed 
properly. Take out the new ink cartridge...

154
Hub is Unusable.A Hub or USB Flash memory 
drive with Hub has been 
connected to the USB direct 
interface. A Hub or USB Flash memory drive with 
Hub are not supported. Unplug the device 
from the USB direct interface.
Image Too Long. The proportions of your photo are 
irregular so effects could not be 
added. Choose a regularly proportioned image.
Image Too Small. The size of your photo is too small 
to trim. Choose a larger image.
Ink low One or more of the ink cartridges 
are running out of ink....