Epson AcuLaser C2800D, Service Manual

Page: 136 / 459

AcuLaser C2800/C2800D/C3800/C3800D Revision C
TROUBLESHOOTING Print Quality Trouble FIP 136
Confidential
3.5.2 Cycle of the Rollers
Figure 3-5. Rollers
The table below shows the rolls and their diameter that have possibilities of causing
print quality troubles and the intervals of their traces which appear on printouts.
C H E C K
P O I N T
When horizontal stripes and spots appear at fixed intervals, it is
highly possible that a specific roll has caused the trouble. If this
happens, you might be able to easily solve the problem by
measuring the interval between the stripes or spots on a test print,
and checking the relationship between the pitches shown in the
table below (note that the pitch does not necessarily match the
length of the roll periphery).
Roll Part Name
Roll Diameter
(mm)
Interval of Traces
(mm)
Drum IMAGING CARTRIDGE
(K/C/M/Y)
24 75.4
BCR IMAGING CARTRIDGE
(K/C/M/Y)
9 28.8
BCR Cleaner Roll IMAGING CARTRIDGE
(K/C/M/Y)
8 25.9
Magnet Roll (K) IMAGING CARTRIDGE
(K)
16 25.2
Magnet Roll (Y,M,C) IMAGING CARTRIDGE
(C/M/Y)
16 22.3
BTR TRANSFER UNIT 12 37.7
Roll ESA TRANSFER UNIT 9 28.3
Drive Roll TRANSFER UNIT 18.1 56.9
Fuser Roll FUSER UNIT 26.32 82.7
Fuser Belt FUSER UNIT 30 94.2
Pinch Roll FUSER UNIT 6 18.8
Exit Roll FUSER UNIT 13.75 43.2
Exit Pinch Roll FUSER UNIT 10 31.4