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Plotter HP DesignJet 500?

Hey guys... Any body can help About warning message "Printhead warning. Poor print quality.", how can i fix that?

Public Comments

1. That means that that your print head is nearing the end of it's service life. The print heads to that machine are consumable parts and come at a cost of about $40 each. Your printer takes a number 11 print head, you should be able to buy these from staples or most cartridge stores (it may be a special order). Refer to your manual about how to remove and replace the print head.
2. You can get ink cartridges, printheads, bond paper, vellum and other products from here and the prices are ok. Depending on your location., they will also service your equipment. www.charrette.com or www.pitman.com or by calling 1-800-367-3729 Regards!
3. previous answers are correct, however this is a recommended service life message, and if your on the cheap i would ignore it until print quality is actually affected. HP want your money. There is no problem with the printhead until you can see one.