
Half-Self Test Functional Check
The electrophotographic process can be subdivided into the following stages:
∙Cleaning (removing excess toner from drum surface)
∙Conditioning (placing a uniform electrical charge on drum)
∙Writing (laser strikes surface of drum to create latent image)
∙Development (formation of the toner image on drum)
∙Transfer (charge to transfer the image to paper)
∙Fusing (heat and pressure to produce a permanent image)
The purpose of the
1Initiate a self test.
2Open the Printer Door after the paper advances
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.) Troubleshoot the failure as a transfer or fusing problem.
If NO image is present on the photosensitive drum, perform the following functional checks:
1Make sure you have removed the entire length of the sealing tape from the toner cartridge before you installed the cartridge.
2Drum Rotation Functional Check.
3High Voltage Power Supply Check.