HP 220 - Manual (Page 143)

7Ć5 Calibrations C3187Ć90000
The lines on the paper serve two purposes: Some lines have already been optically read
by the plotter and used to perform cartridge alignment; others are now to be inspected
by you.
An example of the cartridgeĆalignment plot sheet is shown below. The two pairs of
lines that you should inspect are indicated on this example.
Left cartridge
Right cartridge
}
}
Gap
6 If any of the leftĆcartridge or rightĆcartridge lines includes gaps, then the corresponding
print cartridge should be either cleaned or replaced as appropriate.