The manual for the Hewlett Packard 4500 printer is available at HP.com, as of 2015. The website offers user guides for many different printer models including the Hewlett Packard Deskjet 1010 and the Hewlett Packard Designjet T-120 printer.
HP Officejet 4500 owners visit HP.com. Typing “HP 4500 printer” in the Search box and pressing Enter on the keyboard brings up desired outcomes. Clicking on a result yields the printer’s Web page and then selecting the User Guides icon on the left, and finally clicking the User Guide link in the middle of the page opens the manual in a new browser window in PDF format.