Konica Minolta PKG-675i PKG-675i User Manual - Page 117

saturated MFR. When the MFR

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A large area of Vertical White Lines of varying thickness that occurs immediately after the Print Engine comes out of the Capped State when the MicroFiber Roller (MFR) is enabled. The size of the affected area is on the scale of the print zone width of a single, or multiple printheads. Performing recovery routines does not correct the problem. While a wetwipe of the affected printhead can sometimes improve the situation, as soon as the printhead undergoes a wipe from the MicroFiber Roller, such as when exiting the Capped State, the defect returns. Print Quality (PQ) Defects Saturated MicroFiber Roller More subtle effects caused by a saturated MFR include an increase in 'shallow' cross-color-contamination (CCC) that is visible in printed jobs immediately after the system has performed a wipe. If CCC observed immediately after exiting cap (1st plot in sequence) is increasing over time, check the saturation level of the MFR. The saturation level of the MFR's can be inspected by first entering Diagnostic Mode and moving the service stations to their 'Wiper Up' position. Gently blotting the MFR with a folded clean room wipe should not result in a large transfer of ink to the wipe. The transferred ink should be diffuse, not pitch black or soaking through the wipe. There should also not be any visible puddles of ink on the surface of the MFR. Solution The root cause of this defect is a saturated MFR. When the MFR becomes saturated with waste ink, it can leave behind puddles of ink or a "film-like" residue on the nozzle area of the printhead. Perform three 'Wiper Clean' operations - 30 seconds each in duration, followed by 30 seconds 'off' between on-cycles. If this does not correct the problem, then replace the MF Roller. It has reached its endof-life. DOCUMENT I 18.40V02 - Update: 04.09.2019 OPERATIONAL MANUAL Page 117

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DOCUMENT
I 18.40V02 -
Update: 04.09.2019
Page 117
OPERATIONAL MANUAL
Print Quality
(PQ) Defects
Saturated
MicroFiber Roller
A large area of Vertical White Lines of
varying
thickness
that
occurs
immediately after the Print Engine
comes out of the Capped State when
the
MicroFiber
Roller
(MFR)
is
enabled. The size of the affected area
is on the scale of the print zone width
of a single, or multiple printheads.
Performing recovery routines does
not correct the problem. While a wet-
wipe of the affected printhead can
sometimes improve the situation, as
soon as the printhead undergoes a
wipe from the MicroFiber Roller, such
as when exiting the Capped State, the
defect returns.
More subtle effects caused by a
saturated MFR include an increase in
‘shallow’
cross
-color-contamination
(CCC) that is visible in printed jobs
immediately after the system has
performed a wipe. If CCC observed
immediately after exiting cap (1st plot
in sequence) is increasing over time,
check the saturation level of the MFR.
The saturation level of the MFR’s can
be
inspected
by
first
entering
Diagnostic Mode and moving the
service stations to their ‘Wiper Up’
position. Gently blotting the MFR with
a folded clean room wipe should not
result in a large transfer of ink to the
wipe. The transferred ink
should be
diffuse, not pitch black or soaking
through the wipe. There should also
not be any visible puddles of ink on
the surface of the MFR.
Solution
The root cause of this defect is a
saturated MFR. When the MFR
becomes saturated with waste ink, it
can leave behind puddles of ink or a
“film
-
like” residue on the nozzle area
of the printhead. Perform three ‘Wiper
Clean’ operations –
30 seconds each
in duration, followed by 30 seconds
‘off’ between on
-cycles. If this does
not correct the problem, then replace
the MF Roller. It has reached its end-
of-life.