Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Troubleshooting Picture Image Trouble 5-120
5.4 Picture Image Trouble
5.4.1 Picture Image Troubleshooting Entry Chart
Figure 5-2. Picture Image Troubleshooting Entry Chart
5.5 Picture Quality FIP
NOTE: The following explanation assumes the printer controller is
functioning properly. You can however easily determine
whether the problem is the printer controller or engine by
conducting a test print with the engine alone, with the
exception of problems that cannot be recognized through a
test print.
„
If the test print by the engine alone is good, the problem is caused by
the printer controller.
„
If there is something wrong with the test print by the engine alone is
good, the problem is caused by the engine.
If it appears there is something wrong with the printer controller,
replace the printer controller and interface cable with properly
functioning parts and see if that works.
If the problem continues to occur, check the host side and perform
troubleshooting efficiently using the following picture quality FIP
according to a description of the problem.
If a problem involving printing quality occurs, first find out exactly what the
problem is, make a test print on A3 or A4 paper, and then troubleshoot
effectively by using the corresponding picture quality FIP chart.
If the problem cannot be resolved by picture quality FIP, recheck with picture
quality FIP, and replace “Main Check Parts” of “Initial Check” in the order in
which they are given and see if that works. Perform troubleshooting using
Section 1.3 “Interface Specifications”.