Pq 17 Smears; Pq 17A Smudge - Xerox 8825 Service Manual

PQ 17 Smears

Table 1 Smears Symptom / Check
Symptom/ check Location of Smear Probable Cause
Areas of the image on the
print are blurred. This
occurs at the image transfer
area and is caused by a dif-
ference of speed between
the drum and the media.
20 - 25 mm from the
Lead Edge of the
print
40 - 50 mm from the
Lead Edge of the
print
106 - 126 mm from
the Lead Edge of
the print
150 - 170 mm from
the Lead Edge of
the print
140 - 160 mm from
the Trail Edge of
the print
66 - 86 mm from the
Trail Edge of the
print (Register Roll
Exit Smear)
Random smears
8825/8830 Printer
Corrective Action
Transfer/Detack Check / replace (
Shield incorrectly PL 9.4)
installed.
Fabric Guide worn, Check / replace (
contaminated or REP 8.9).
incorrectly installed.
1. Worn (smooth) Check / replace (
Heat Roll ( PL 10.2) REP 10.2)
2. Worn Contami- Check / replace (
nated Fabric Guide REP 8.9)
( PL 10.3) 3. Check / replace
3. Pressure Plate A ( REP 8.5)
installed incorrectly
or deformed ( PL
10.3).
Pressure Plate B Check / replace (
installed incorrectly REP 8.5)
or deformed.
Cutter Check for loose
Cutter Drive Pulley,
Shim / replace ( PL
7.8)
Buckle Switch Enter [8-2 and
check for correct
operation ( PL 8.4)
Media Transport Ensure that the
Media Transport
gap ( ADJ 8.4) is set
correctly.

PQ 17A Smudge

Table 1 Smudge Symptom / Check
Symptom/ check Location
A smudge is a displacement Smudge
of the toner image on the
drum or the media.
Perform GP 2, Image on Media
Drum to determine if the
Smudge occurs on the
media or the drum.
Media
Media
Media
Media
Vellum Smudge is a special Combination of Vellum beam strength
defect that exhibits marginal and low Heat Roll drive force.
fusing fix. Toner can chip off media is flexible enough that it buckles
of the media and horizontal between Pressure Plates A and B. The
lines are broken (image dis- toner then melts and partially sticks to the
placement). Heat Roll. As the media enters the Pres-
sure Plate B, it flattens and the image is
displaced in front of it's correct position.
The toner can also become a clump on
the media and easily chip off of the
media.)
Drum
Drum
01/02
3-17
of Probable Cause Corrective Action
Heat Roll Check for a worn
(smooth) Heat Roll.
Replace (
10.2)
Fabric Guide Check for a worn /
contaminated Fab-
ric Guide. (
8.9)
Excessive media Ask the customer to
curl (smudge replace the media.
appears 100 mm
from lead or trail
edge)
Detack Corotron Check for contami-
nation or signs of
arcing. Clean /
replace ( PL 9.4)
Buckle Switch Check the Buckle
Switch for correct
operation ( PL 8.4)
Replace the Fabric
(The Guide ( REP 8.9)
and the Heat Roll (
REP 10.2).
Mechanical interfer- Check for interfer-
ence with the image ence.
on the drum
Buildup of devel- Push excess devel-
oper material on the oper material back
lower extrusion of into the housing.
the developer hous-
ing rubbing the
developed image
on the drum.
Print Quality
PQ 17, PQ 17A
REP
REP