Epson ColorPage EPL-C8000 Service Manual page 441

EPSON EPL-C8000
5.4.2 Print Quality FIP
NOTE: The Print Quality FIP is applicable on the condition that the
printer controller (Controller PWB) is functioning properly. To
isolate the cause of the problem, whether the engine side or
controller side, you can run a test print using the engine or
diagnostic board. (Some print problems can not be explained by
the test print.)
If the test print using the engine or diagnostic board is performed
properly, it means the Controller PWB is faulty. On the other
hand, if neither test runs abnormally, it means the fault is on the
engine side.
If "a fault on the Controller PWB side" is assumed, replace the
Controller PWB and the interface; and check the performance. If
the same trouble occurs after replacement, check the host
computer and perform troubleshooting efficiently using the
following print quality FIPs.
When you find a print quality problem, output an image on a A4 or A3
paper to grasp and understand the troubled condition well and apply the
appropriate solution.
If the problem is not solved using the FIP, repeat the FIP again, and
replace the parts listed in the "Preliminary inspection" one by one to
troubleshoot.
Chapter 5 TROUBLESHOOTING
The FIPs for the common problems are as listed below:
n FIP-3.1 "Low image density"
n FIP-3.2 "Blank prints"
n FIP-3.3 "Black prints"
n FIP-3.4 "White/light deletion along the Paper Feed Direction"
n FIP-3.5 "White/Shady deletion lines appear vertically to the
paper feeding direction"
n FIP-3.6 "Black/Color Spots"
n FIP-3.7 "Toner Smearing"
n FIP-3.8 "Skew"
n FIP-3.9 "Creased paper"
n FIP-3.10 "Improper fusing"
NOTE: Refer to the table below which shows the circumference (=
printed cycle) of each roll that is related in the print quality
troubleshooting.
Table 5-24. Roller Circumferences
Parts (Higher Assembly)
Magnet Roll (DEVELOPER ASSY.)
Drum (DRUM CARTRIDGE)
BCR (DRUM CARTRIDGE)
1ST BTR (TRANSFER ASSY)
BACK UP ROLL (TRANSFER ASSY)
2ND BTR (2ND BTR ASSY)
HEAT ROLL (MAIN FUSER ASSY)
PRESSURE ROLL (MAIN FUSER ASSY)
OIL ROLL (OIL ROLL ASSY)
FEED ROLL
Rev. B
Cycle
28 mm
264 mm
44 mm
59 mm
88 mm
88 mm
117 mm
117 mm
107 mm
90 mm
5-107