7-74 Troubleshooting
EN
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:
1 Print a Configuration Page from the Control Panel INFORMATION
MENU.
2 Open 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.
3 Remove the Toner Cartridge.
4 Open 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:
