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Half self-test check
If an engine test reveals a problem with the image-formation process, the half self-test check allows
you to narrow down the area in which the problem exists.
To perform a half self-test check, complete the following steps:
1 Perform an engine test. See
Engine test.
2 During the engine test, open the cartridge door after the paper advances halfway through the
device (about five seconds after the motor begins rotation). The leading edge of the paper should
have advanced past the imaging drum.
3 Remove the imaging drum.
4 Open the imaging drum shield to view the drum surface. If a dark and distinct toner image is
present on the drum surface, assume that the first three functions of the image-formation
process (see the list at the beginning of
Engine test) are functioning (through the development
stage). Troubleshoot the failure as a transfer or fusing problem.
If, during the half self-test check, no image is present on the imaging drum, perform these checks:
1 Make sure that you removed the entire length of the sealing tape from the print cartridge before
you installed the cartridge.
2 Perform a cartridge high-voltage contact test. (See
Cartridge high-voltage contact test.)
Heating element test
Paper passes between the heating element and a soft pressure roller to fuse toner to the paper.
1 Unplug the device for at least ten minutes, and then remove the fuser. See
Replacing the fuser
assembly.
296 Chapter 6 Troubleshooting ENWW
308


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