Canon PIXMA MP250 - Manual (Page 58)

If the problem is still not resolved after replacing the FINE Cartridge, contact the service center.
When the Print Results Are Not Even such as the Ruled Lines
Are Misaligned:
See Aligning the Print Head .
Note
You can also perform the maintenance operations from your computer.
For details, refer to the on-screen manual: Advanced Guide .
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Page 58 of 678 pages When Printing Becomes Faint or Colors Are Incorrect