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HP LaserJet 4200, 4300 Series Printers - Test Pages
This document is intended to help isolate image defects through the use of a half self-test functional check and a drum rotation functional check.
Half self-test functional check
The electrophotographic process can be subdivided into the following stages:
The purpose of the half self-test check is to determine which process is malfunctioning. Perform the test as follows:
If a dark and distinct toner image is present on the drum’s surface, assume that the first four functions of the electrophotographic process are functioning (cleaning, conditioning, writing, and developing), and troubleshoot the failure as a transfer or fusing problem.
If no image is present on the photosensitive drum, perform the following check.
Drum rotation functional check
The photosensitive drum, located in the print cartridge, must rotate for the print process to work.
The photosensitive drum receives its drive from the main gear assembly. To determine whether the drum is rotating: