Canon I Sensys Mf8550cdn User Guide

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Transfer Belt
Dirt  may  adhere  to  the  transfer belt inside the  machine and  cause  the  print quality  to  deteriorate. To clean  the  transfer belt,  perform  the
following  procedure. Note that  you cannot  clean  the  transfer belt when the  machine has documents waiting  to  be printed.
Press  .
Use  /  to select ,  and  press  .
Select ,  and  press  .
Press  .
Cleaning  starts. When  the   message is  displayed approximately  1  to  2  minutes  later, press to  return to  the  main...

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Replacing Toner Cartridges
The machine will  display a message when a toner cartridge  is  nearly empty.  Note that  the  print quality  becomes poor if  you continue
printing without taking any action.  You  can check  the  remaining toner level  on  the  display.
When a Message Appear
If Printouts are Poor in Quality
Checking Toner  Level
When a Message Appear
The message that  is  displayed depends on  the  amount of remaining toner.  Depending on  which message is  displayed,  you will  need...

reason may  be that  a toner cartridge  that  has reached the  end  of its lifetime is  still inserted in the  machine. It is  recommended  that
you replace  this cartridge  with a new one.Pressing   will  return to  the  main  screen.
IMPORTANT
You  can continue printing when this message is  displayed,  but the  print quality  may  deteriorate.
If Printouts are Poor in Quality
If  your printouts begin to  show any of the  following  features,  one of your toner cartridges  is  nearly empty.  Replace...

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How to Replace Toner Cartridges
Read the  precautions in Maintenance and  Inspections and  Consumablesbefore replacing the  toner cartridges.
Open the front cover.
Pull out the cartridge tray.
MF8580Cdw / MF8550Cdn / MF8540Cdn MF8280Cw / MF8230Cn
Pull the toner  cartridge straight up and  out of the machine.
Remove  the replacement  toner  cartridge from the protective bag.
Shake the toner  cartridge 5 or 6 times as shown below  to evenly distribute the toner  inside the cartridge,
and  then...

IMPORTANT:
When pulling  out  the sealing  tape
If  the  sealing tape remains  inside the  toner cartridge,  the  quality  of printouts,  including faxes,  may  deteriorate. Also  note that  it
will  not  be possible to  reprint a fax  because  the  fax  function automatically deletes data once it is  printed.Do not  pull out  the  sealing tape at an  angle or sideways. If  the  tape breaks, you may  not  be able  to  pull it out  completely.
If  the  sealing tape becomes stuck when pulling  it out, keep...

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About Replacement Toner Cartridges
The average yields of the  toner cartridges  are  shown in the  table below. Purchase the  toner cartridges  at your local authorized Canon
dealer.  For optimum  print quality, using Canon  genuine toner cartridges  is  recommended. To find a dealer near  you, contact the  Canon
help line. Follow  the  precautions when handling and  storing  toner cartridges  (
Consumables ).
 The  average  yield is based on "ISO/IEC  19798"  (the global  standard...

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Relocating the Machine
The machine is  heavy. Make  sure  to  follow  the  procedures below when moving  the  machine to  avoid  injury, and  also  make sure  to  read
the  safety precautions before you begin. Important  Safety Instructions
Turn OFF  the machine and  computer.
When  you turn  OFF  the  machine, data that  is  waiting  to  be printed is  deleted. Fax documents that  were received by using the
Memory Reception  function,  faxes that  are  waiting  to  be sent, and  reports that...

MF8280Cw / MF8230Cn
Carefully place the machine at the new installation site.
For information  about  how to  install the  machine after relocating it, see  Setting Up the Machine.
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Maintaining and Improving Print Quality
If  the  printing results are  not  satisfactory such as low  image quality, poor reproducibility, or print color mismatch,  try the  adjustments
below.
Auto  Adjust  Gradation
If  the  density  or brightness  of colors in printouts and  originals  are  different, perform   to  improve  color
reproducibility. There  are  three types of adjustments: , , and  .  Correcting  the
Gradation
Correct Print Color Mismatch
If  the  colors in printouts become...

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Correcting the Gradation
Gradation  refers to  the  dark  to  light continuum of shades of a color. The more shades in the  gradations of colors that  are  printed,  the
more natural  printouts seem. If  color reproducibility  becomes poor and  the  density  and  brightness  of printouts differs markedly from the
originals, perform  the  appropriate auto  adjustment. Before adjusting the  gradation, check  the  remaining toner level.  Gradation
adjustments  require significant  toner (
Checking...