Component tests
Half self-test
Perform a half self-test to determine which image-formation process might be malfunctioning.
NOTE: It might be easier to perform the print/stop test to stop the product during the printing process.
See
Print/stop test on page 157.
1. Print a configuration page from the control panel.
2. Open the cartridge door after the paper advances half-way through the product, which is about 3
to 5 seconds after the main motor begins to rotate. The leading edge of the paper should have
advanced past the print cartridge.
3. Remove the print cartridge.
4. Open the print cartridge drum shield to view the drum surface.
If a dark and distinct toner image is present on the drum surface, assume that the cleaning,
conditioning, writing, and developing functions of the electrophotographic process are functioning
correctly. Troubleshoot the failure as a transfer or fusing problem. If no image is present on the
drum, perform the drum rotation test check. See
Drum rotation test check on page 158.
Drum rotation test check
NOTE: This test is especially important if refilled print cartridges are in use.
The photosensitive drum, which is located in the print cartridge, must rotate in order for the print process
to work. The photosensitive drum receives its drive from the main gear assembly. Use this procedure
to determine whether the drum is rotating.
1. Open the cartridge door.
2. Remove the print cartridge.
3. Mark the cartridge drive gear with a felt-tipped marker. Note the position of the mark.
4. Install the print cartridge, and then close the cartridge door. The start-up sequence should rotate
the drum enough to move the mark on the gear.
5. Open the product and inspect the mark on the cartridge drive gear.
Verify that the mark moved. If there was no movement, inspect the main gear assembly to make
sure that it connects with the print-cartridge gears. If the drive gears function but the drum does
not move, replace the print cartridge.
Diagnostics menu components test
Use this diagnostic test to isolate and test individual product components.
1. Press the Menu button
.
2. Press the down arrow
button or the up arrow button to navigate to the DIAGNOSTICS menu,
and then press the OK button.
3. Press the down arrow
button or the up arrow button to navigate to the COMPONENT TEST
sub menu, and then press the OK button.
158 Chapter 3 Solve problems ENWW
