HP 5000n manual Image System Troubleshooting Half Self-Test Functional Check, 74Troubleshooting

Image System Troubleshooting

Half Self-Test Functional Check

The electrophotographic process can be subdivided into the following stages:

●Cleaning (removes excess toner from drum surface)

●Conditioning (places a uniform electrical charge on drum)

●Writing (laser strikes surface of drum to create latent image)

●Developing (forms the toner image on drum)

●Transferring (charges transfer the image to paper)

●Fusing (heat and pressure produces a permanent image)

The purpose of the Half Self Test Check is to determine which process is malfunctioning. Perform the test as follows:

1Print a Configuration Page from the Control Panel INFORMATION MENU.

2Open the top cover after the paper advances half-way through the printer (about five seconds after the Main Motor begins rotation). The leading edge of the paper should have advanced past the Toner Cartridge.

3Remove the Toner Cartridge.

4Open the Toner Cartridge’s drum shield to view the drum’s surface.

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 - see Chapter 5), and troubleshoot the failure as a transfer or fusing problem.

If no image is present on the photosensitive drum, perform all the following functional checks:

7-74Troubleshooting EN