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CAUTION The printer has an internal clock which allows it to wash the printheads automatically, flushing some ink through the printhead, which keeps the printheads in good condition. This is done after the first 20 hours without printing and every 3 days. If the printer is switched off for a long period, this process does not happen. If the ink does not flow through the printheads from time to time, the ink will dry inside the nozzles, reaching a point where it is impossible to recover them and the printhead will fail. If the printer must be switched off for a long period of time, the customer must use either the optional HP Ink System Cleaning Kit or HP 790 Storage Kit to recover or protect the printheads.
Automatic maintenance and cleaning will not be performed even if you turn off the printer on the front panel. The printer power switch on the rear of the printer should only be used when the printer is turned off to move it, to connect it to a computer, or to install or maintain printer parts.
| Category | Inspection/Maintenance |
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1 | Daily inspection and maintenance | Wiper blade cleaning |
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| Wiper sponge cleaning — see Wiper |
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| blade cleaning |
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| Capping unit cleaning |
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| Normal printhead recovery |
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| IQ Print |
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2 | Monthly inspection and maintenance | Normal printhead recovery |
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3 | When leaving the printer for a long time | Ink system storage |
| in power off state (more than 2 weeks) |
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4 | When returning the printer from a long |
| time leaving (more than 2 weeks) |
Clean ink system
Charge the ink system after cleaning the ink system
5 | When returning the printer from a long |
| time leaving (within 2 weeks) in power |
| off state |
Clean ink system
Charge the ink system after cleaning the ink system
6 | When leaving the printer in power off |
| for more than one month |
A service call error message will be displayed on the front panel. Contact HP Support.
Daily printhead maintenance
WARNING! Failure to perform daily maintenance procedures may result in damage to your printer printheads and will invalidate your warranty.
66 | Chapter 6 How do I maintain the printer? | ENWW |