05/2014
3-37
DC SC2020
Image Quality Troubleshooting
3.2.2 How to use the image quality troubleshooting (IPS)
Version 1.1
36 White in BCR Pitch Axial Direc-
tion
Xero After leaving the Xero Unit under low temperature/low
humidity environment for about a week,white in the axial
direction of BCR pitch may appear intermittently. (Influ-
enced by the contact location of BCR and Spiral CLN-R)
-> This will disappear after printing about 10 copies.
Low temper-
ature/Low
humidity
environment
Side-1
Side-2
All After leaving
Xero ERU
alone for
1week
• Print about 10 copies
• Xero ERU Replacement
• Photo receptor replacement
37 Reverse DarkLines Transfer Black horizontal lines may appear randomly on the half-
tone image part depending on the image density.
Azone is
stress
K color is
easy to come
out.
TC is low
• 2nd Transfer Voltage Offset Adjustment
Optimize secondary transfer voltage with
(Maintenance -> Adjust 2nd BTR) (Set to
Minus side).
• 1st Transfer Voltage Offset Adjustment
Optimize secondary transfer voltage with
(Maintenance -> Adjust Transfer Belt Unit)
(Set to Plus side).
•TC Up
•Vh Up
38 DTS Line Transfer Black lines may appear in 3mm interval in the paper
feed direction on the K color image part during duplex
printing.
Mid humid-
ity~High tem-
perature
environment
Side-2 Plain paper
(Lightweight
• Use substitute paper (Heavyweight paper).
If it occurs with LEF feed with paper size A4 or
less, switch the feeding direction from LEF
feed to SEF feed.
39 Paper wrinkle Fusing
Unit
Paper wrinkle may occur in parts of paper such as A3/
Octavo. The paper wrinkle performance worsens in high
humidity environment.
ALL Side-1
Side-2
Plain paper
(Lightweight
• Use fresh paper.
• Reset the paper in the TRAY.
40 Gloss paper image disorder Fusing
Unit
There may be an image disorder on the image surface
when printing high density image in Gloss Paper.
ALL Side-1
Side-2
Coated Performance limit with normal Fusing Unit
41 Unable to feed the envelope Fusing
Unit
Heavyweight large size (such as C4) envelop is unable
to go through the Fusing Unit which may cause JAM.
ALL Side-1
Side-2
Envelope • Performance limit with normal Fusing Unit
• When JAM occurs with LEF feeding, switching
to SEF feeding may resume the feed.
42 LPH Chip Line LPH For a background with low Cin M color, C color (ex: blue
sky), a color line with LPH chip width of 10.7mm may be
emphasized in the direction of the process.
ALL Dispersion in LPH intensity -> Change the image
quality mode.
43 Pine needle-like white Transfer When printing plain paper after continuously printing
heavyweight paper in low temperature/low humidity envi-
ronment, part of the image may come out white.
Low temper-
ature/Low
humidity
environment
Plain paper
after continu-
ous heavy-
weight paper
print
Wet the rag with water and wipe the Reg Roll, Pinch
Roll.
Table 1
Image Quality Problem Name SUB Details
Occurrence Condition
Interim Measures Details
Environmen
t
Side-1
Side-2 Media
Others
Conditions
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