Are you being charged for color pages when your printing black-and-white? Your color printing device prints the color black in one of two ways: composite black or true black. The below side-by-side comparison simulates the difference you might see in your printed output between the two. The cyan, magenta, yellow, and black toners are all combined to create composite black. Composite black is typically used when printing photographs. This is also used when printing gray scale.
HP Officejet 6812 HP Officejet 6815 HP Officejet 6820 HP Officejet Pro 6230 HP Officejet Pro 6830 HP Officejet Pro 6835 There is a problem with the printhead error message displays on the printer control panel or computer. The error might include an error code that begins with 0xc19. Figure : 'Problem with printhead' error message This error indicates a hardware failure, and the printer requires service or replacement. Your printer model might be replaced under the following
Replace the Intermediate Belt Transfer (IBT) Cleaner A message will be displayed on the Control Panel when the Transfer Belt Cleaner needs to be replaced. Make sure the machine has stopped copying / printing. Open the Front Cover of the printer. Turn the orange lever to the right to unlock the belt cleaner. Turn the orange knob to the left until it releases. Pull the belt cleaner straight out of the printer. WARNING: Be careful not to touch any Toner adhering to the Transfer
The supply life counters must be reset when some supplies are replaced. Login as the System Administrator. User Name is "admin" and the password is "1111" Press the [Log In / Out] button on the Control Panel, enter the System Administrator login information, and then press [Enter]. Press the [Machine Status] button on the Control Panel. The Machine Status screen will be displayed on the Touch Screen. Select the [Tools] tab. Select the [Troubleshooting] button. Select [Resets]