Lexmark C77X, Руководство по обслуживанию

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3-4
Service Manual
5061
Partial Print Test
Diagnostic procedure for missing or faded planes
1.
Turn the printer off.
2.
Remove all cartridges and the ITU.
3.
Inspect the bellcranks.
4.
Enter the Configuration Menu. See “Configuration Menu” on page 3-31 .
5.
Select Prt Quality Pgs , and press Select .
6.
Open the vacuum transport belt (VTB) jam access door, and watch the test pages pass from left to right
over the VTB.
There is a delay between the first and second page.
7.
Once the pages are printed, examine the pages to confirm the color plane is not printing.
Note: The third page is particularly important since it is the image on the belt when the test printed.
8.
Select Prt Quality Pgs , and press Select .
Open the VTB through the access door and, once again, watch the test pages pass over the VTB.
9.
When the top half of the second page passes over the VTB, quickly open the front cover assembly. The
printing stops.
10.
Remove all four toner cartridges, and set them facedown.
Look at the surface of each toner cartridge, and check for a developed image.
Interpreting the results
If the developed images are not visible on one of the PC drums, the following components should be checked:
•
Toner cartridge—Switch cartridges to determine if the problem stays with the slot or cartridge.
•
Cartridge contact block pins—Verify that pins are spring loaded and properly positioned. See “Cartridge
contact assembly pin locations (cyan, magenta and yellow)” on page 5-4 .
•
Developer HVPS cable—Make sure that there is no damage to the cable running from the system board.
•
Developer HVPS board
•
System board
Approximate
final stopping
place