Brother MFC 425CN User Manual

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 14
Setting Dial Tone detection
When you send a fax automatically, by default your machine will wait 
for a fixed amount of time before it starts to dial the number. By 
changing the Dial Tone setting to Detection you can make your 
machine dial as soon as it detects a dial tone. This setting can save 
a small amount of time when sending a fax to many different 
numbers. If you change the setting and start having problems with 
dialling you should change back to the default No Detection 
setting.
1Press Menu/Set, 0, 5.
2Press ▲ or ▼ to select Detection (or No Detection).
Press 
Menu/Set.
3Press Stop/Exit.
Compatibility
If you are having difficulty sending or receiving a fax due to possible 
interference on the phone line, we recommend that you adjust the 
Equalization for compatibility. The machine adjusts the modem 
speed for fax operations.
1Press Menu/Set, 2, 0, 2.
2Press ▲ or ▼ to select Basic (or 
Normal).
Press 
Menu/Set.
3Press Stop/Exit.
■Basic reduces the modem speed to 9600 bps. Unless 
interference is a recurring problem on your phone line, you 
may prefer to use it only when needed.
■Normal sets the modem speed at 14400 bps. (Default)
Miscellaneous
2.Compatibility
 
						

							12 - 15   TROUBLESHOOTING AND ROUTINE MAINTENANCE
How to improve print quality
Cleaning the print head
To ensure good print quality, the machine will regularly clean the 
print head. You can start the cleaning process manually if needed.
Clean the print head and ink cartridges if you get a horizontal line in 
the text or graphics on your printed pages. You can clean Black only 
or three colours at a time (Cyan/Yellow/Magenta), or all four colours 
at once.
Cleaning the print head consumes ink. Cleaning too often uses ink 
unnecessarily.
Caution
Do NOT touch the print head. Touching the print head may cause 
permanent damage and may void the print head’s warranty.
1Press Ink Management.
2Press ▲ or ▼ to select Cleaning.
Press 
Menu/Set.
3Press ▲ or ▼ to select Black, Color or All.
Press 
Menu/Set.
The machine will clean the print head. When cleaning is 
finished, the machine will go back to standby mode 
automatically.
If you clean the print head at least five times and the print has 
not improved, call your Brother dealer for service.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 16
Checking the print quality
If faded or streaked colours and text appears on your output, some 
of the nozzles may be clogged. You can check this by printing the 
Print Quality Check Sheet and looking at the nozzle check pattern.
1Press Ink Management.
2Press ▲ or ▼ to select Test Print.
Press 
Menu/Set.
3Press ▲ or ▼ to select Print Quality.
Press 
Menu/Set.
4Press Colour Start.
The machine begins printing the Print Quality Check Sheet.
5Follow the instructions given on the sheet to see if the quality is 
OK.
Colour block quality check
The LCD shows:
6Check the quality of the four colour blocks on the sheet.
7If all lines are clear and visible, press 1 (Yes), and go to Step 10.
—OR—
If you can see missing short lines as shown below, press 
2 (No).
The LCD will ask you if the print 
quality is OK for black and three 
colours.OK Poor
Is Quality OK?
1.Yes 2.No
Black OK?
1.Yes 2.No
 
						

							12 - 17   TROUBLESHOOTING AND ROUTINE MAINTENANCE
8Press 2 (No) for Black or three 
colours with a problem.
The LCD shows:
Press 
1 (Yes).
The machine will start cleaning the print head.
9After cleaning is finished, press Colour Start. The machine will 
start printing the Print Quality Check Sheet again and then 
return to step 5.
10Press Stop/Exit.
If you still see missing ink in this Print Quality Check Sheet, repeat 
the cleaning and test print procedures at least five times. If ink is still 
missing after the fifth cleaning and test print, replace the ink cartridge 
for the clogged colour. (Perhaps the ink cartridge was in your 
machine over six months or the expiration date written on the 
cartridge package has passed. Or, the ink may not have been stored 
properly before use.)
After replacing the ink cartridge, check it by printing another Print 
Quality Check Sheet. If the problem still exists, repeat the cleaning 
and test print procedures at least five times for the new ink cartridge. 
If ink is still missing, call your Brother dealer for service.
Caution
Do NOT touch the print head. Touching the print head may cause 
permanent damage and may void the print head’s warranty.
When an print head nozzle 
is clogged the printed 
sample looks like this.After the print head nozzle is 
cleaned, the horizontal lines 
are gone.
Start Cleaning?
1.Yes 2.No
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 18
Checking the printing alignment
You should rarely need to adjust the printing alignment however, if 
after transporting the machine your printed text becomes blurred or 
images become faded then adjustment may need to be made.
1Press Ink Management.
2Press ▲ or ▼ to select Test Print.
Press 
Menu/Set.
3Press ▲ or ▼ to select Alignment.
Press 
Menu/Set.
4Press Mono Start or Colour Start.
The machine begins printing the Alignment Check Sheet.
The LCD shows:
5Check the 600 dpi and 1200 dpi test prints to see if number 5 
most closely matches number 0. If the number 5 sample of both 
the 600 dpi and 1200 dpi are the best matches, press 
1 (Yes) to 
finish Alignment Check, and go to Step 8.
—OR—
If another test print number is a better match for either 600 dpi 
or 1200 dpi, press 
2 (No) to select it.
6For 600 dpi, press the number of the 
test print that most closely matches 
the number 0 sample (1-8).
7For 1200 dpi, press the number of 
the test print that most closely 
matches the number 0 sample (1-8).
8Press Stop/Exit.
Is Alignment OK?
1.Yes 2.No
600dpi Adjust
Select Best # 5
1200dpi Adjust
Select Best # 5
 
						

							12 - 19   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Checking the ink volume
You can check the ink that is left in the cartridge.
1Press Ink Management.
2Press ▲ or ▼ to select Ink Volume.
Press 
Menu/Set.
3Press ▲ or ▼ to select the colour you 
want to check.
The LCD shows the ink volume.
4Press Stop/Exit.
You can check the ink volume from your computer. (For 
Windows® users, see Status Monitor on page 1-3 in Software 
User’s Guide on the CD-ROM or Macintosh® users, see Status 
Monitor on page 8-2 in Software User’s Guide on the CD-ROM.)
Ink Volume
Bk:- +
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 20
Packing and shipping the machine
Whenever you transport the machine, use the packing materials that 
came with your machine. If you do not pack the machine properly, 
you could void your warranty.
Caution
It is important to allow the machine to ‘park’ the print head after a 
print job. Listen carefully to the machine before disconnecting it from 
the power source to ensure that all mechanical noise has stopped. 
Not allowing the machine to complete this parking process may lead 
to print problems and possible damage to the print head.
1Lift the scanner cover from the right-hand side of the machine 
until it locks securely into the open position.
2Remove all the ink cartridges and attach the protective parts. 
(See Replacing the ink cartridges on page 12-26.)
Caution
If you are not able to find the protective parts, do NOT remove the ink 
cartridges before shipping. It is essential that the machine be 
shipped with the protective parts or the ink cartridges in position. 
Shipping without them will cause damage to your machine and may 
void your warranty.
When attaching the protective parts,  
make sure it clips into place as shown in the diagram.
 
						

							12 - 21   TROUBLESHOOTING AND ROUTINE MAINTENANCE
3Lift the scanner cover to release the lock. Gently push the 
scanner cover support and close the scanner cover.
4Unplug the machine from the telephone wall socket and remove 
the telephone line cord from machine.
5Unplug the machine from the electrical socket.
6Unplug the interface cable from the machine, if it is connected.
7Wrap the machine in the bag and place it in the original carton 
with the original packing material.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 22
8Pack the printed materials in the original carton as shown below. 
Do not pack the used ink cartridges in the carton.
9Close the carton. 
 
						

							12 - 23   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Routine maintenance
Cleaning the scanner
Lift the document cover. Clean the scanner glass with isopropyl 
alcohol on a soft lint-free cloth.
Clean the glass strip under the film with isopropyl alcohol on a 
lint-free cloth.
Document 
Cover
Glass Strip