Canon BJC-620 - Manual (Page 74)

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The most basic problems you may encounter are "the printer does not
print" and "your print quality is not satisfactory."
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{ Check all your cable connections
{ Check your Microsoft Windows Printing System setup
{ Check your computer configuration
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{ Clean the print head unit
{ Clean the print head unit five times
{ Replace the ink tanks
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The first time you turn on the printer, it performs an initialization
process and flushes the print head unit to make sure the nozzles are
clear. This takes approximately three minutes. It is done only once - the
first time you turn on the printer.
As the printer flushes the print head unit, various lights flash and then
stay on. These lights indicate where the printer is in the cleaning
process.
If a print head unit error occurs when you turn in the printer, the orange
ERROR light and one or more PRINT MODE lights flash. Follow
these steps:
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z Press the POWER button to turn off the printer.
z Unplug the printer.
{ Wait ten seconds and then reattach the power cord.
z Remove the ink tanks.
 7URXEOHVKRRWLQJ Chapter 5