HP 72SI User Manual download pdf (Page 56)

3-8 Checking Jet Health

Print Prime Bars 1. From the control panel Front Page screen, press the Prime

Bars key.

The control panel displays a prompt asking you to enter the

total width of the prime bar pattern you wish to print.

2. Enter a width for the prime bar pattern by pressing the )

and , keys.

3. Press the ! (Proceed) key to continue.

The printer prints the prime bar pattern. The prime bars will

show correctly working jets with a solid line, and missing

jets with no line.

Purge-n-Wipe Printheads When prime bars indicate missing or deflected jets, automatic

jet maintenance should be supplemented by a Purge-n-Wipe

operation: air pressure forces ink through the inkjets, then the

service station dips the wipers in cleaning solvent and wipes the

inkjet orifice plate.

You can purge all sixteen printheads at once or purge a single

color (four printheads).

To purge-n-wipe all sixteen printheads:

1. From the control panel Front Page screen, press the Purge

key.

The control panel prompts you to press the ! (Proceed) key

to continue.

2. Press the ! (Proceed) key to continue.

The printer purges the printheads with air pressure, then

wipes them with the service station wipers. Approximately 1

milliliter of ink per color is expelled by this purge.

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HP 72SI User Manual Page 56