Fuji Xerox DocuCentre SC2020 Service Manual page 194

DC SC2020
Version 1.1
Image Quality Problem Name SUB
7 Rough Black Transfer The Toner will not get transferred into the rough parts for
8 Moist Paper Transfer Failure Transfer The resistance drops when the paper hydrates.
9 Paper front edge/rear edge Transfer When the paper that has been loop formed in transfer
Toner smear on (the edge)
10 Tail Edge Transfer Failure Transfer After releasing the secondary transfer nip, the paper rear
11 MWS(Side2) (MicroWhiteS- Transfer When the secondary transfer part resistance is high
pots)
Details
paper with poor smoothness and texture, and the trans-
fer will be rustled.
On the other hand, since K color which includes carbon
has a big dielectric loss, the necessary electric field dif-
fers from other colors.
Due to this, the necessary electric field difference
between multicolor and K color becomes big from the dif-
ference of paper resistance and the toner resistance,
which narrows the transfer latitude and creates uneven-
ness.
fixation releases the secondary transfer nip, the rear
edge part moves to the opposite direction of the feeding
direction and occurs by touching the belt by 2nd BTR
surface or DTS HSG or a flip-up.
edge part flips-up and re-transfers to the center transfer
belt from the fixing ironing effect, resulting in roughness
or white occurring on the paper rear edge part (within
10mm including blank space).
such as first thing in the morning of low humidity environ-
ment, the transfer latitude of multicolor and single color
is narrow and the voltage it set towards the multicolor.
Due to this, the voltage becomes too much for the dingle
color and fine white dots may appear on the image in
Side2 from the electric discharge phenomenon of the
transfer nip.
05/2014
3.2.2 How to use the image quality troubleshooting (IPS)
3-32
Table 1
Occurrence Condition
Environmen Side-1 Others
t Side-2 Media Conditions
All Paper with
poor smooth-
ness or texture
High humidity When feeding K stands out
environment paper that fits
high humidity
environment
(hydrated
paper)
All When there
is an unex-
pected toner
smear in 2nd
BTR or DTS
HSG (fog-
ging).
All •
•
Low humidity Side2 is • Paper First thing in
environment stress. with poor the morning
smooth- of low tem-
ness is a perature/low
stress humidity
environment
• Paper left
is a stress.
out in low
humidity
environ-
ment is a
stress
Image Quality Troubleshooting
Interim Measures Details
• Change to paper with better smoothness or
texture
• 2nd Transfer Voltage Offset Adjustment
Optimize secondary transfer voltage with
(Maintenance - Adjust 2nd BTR) (Set to Minus
side).
Please use unopened paper.
• To control fogging, expand the cleaning field
(within the permissible limit of thin line repro-
ducibility)
• Reduce the Toner Band (within the permissi-
ble limit of density maintainability)
When
the posi-
tion of
the
paper
worsens
Perfor-
mance
limit
2nd Transfer Voltage Offset Adjustment
Optimize secondary transfer voltage with (Mainte-
nance -> Adjust 2nd BTR) (Set to Minus side).