Compaq 4700 HP manual Diagnostics

Information

Table 2-6	Diagnostics Page (continued)
Callout	Area on the screen	Information or capability that the area provides
2	Calibration	Lists the last color-plane registration (CPR) page count, the last CPR page-count
	Information	date, the last page count (in engine cycles) for DMAX/DHALF, and the last DMAX/
		DHALF page-count date.
		Color plane registration occurs when new print cartridges are installed to
		compensate for any slight variations that might occur in cartridge circumference.
		DMAX is a density calibration of each print cartridge color at 100% coverage;
		DHALF is also a density calibration of each print cartridge color, but as a halftone
		instead of a full color. During halftone printing, the dots of toner are spread out, and
		coverage of the toner is less than 100%.
3	Color Density	Lists the cyan, magenta, yellow, and black (CMYK) values for highlights, midtones,
		and shadows.
4	Parameters	For color devices, specific engine settings related to the printing or
		electrophotographic process are critical in identifying device status and function.
		The electrophotographic parameters, which are used to detect, diagnose, and track
		print-quality defects, appear in a 272-cell binary array that contains the settings

registered by the device engine. These registers also appear at the bottom of the Diagnostics Page screen.

18 Chapter 2 Viewing product status from the HP EWS Information screens ENWW