Oce 7050 Technical & Service Manual page 40

White stripes in feed direction
possible cause
absorber foil not in position
dirty corona wire
wires fuser
dirty output rollers
air handling
developing unit polluted
deposit on the drum
Black stripes perpendicular to the feed direction
possible cause
developing unit connected to
ground
cleaning blade vibrates
drum occasionally not
grounded
light intensity changes
White stripes perpendicular to the feed direction
possible cause
drum occasionally not
grounded
grid short-circuited to ground
light intensity changes
ed. 6
action / remark
check foil
page 7
see Maintenance
extremely curled paper
clean with cleaner K
6 "Dirty copy"
See Faults
scratches)
check toner brush
clean the drum (See Maintenance
action / remark
measure bias voltage on high voltage supply
22PBA04 TP1 (-200V DC ± 4VDC)
check glue / springs
clean / measure drum current (See Faults
page 37 )
check exposure supply 04PBA01
I
check exposure setting
I
check exposure sensor 04PBA02
I
action / remark
clean / measure drum current (See Faults
page 37
)
pollution, clean (See Maintenance
I
stainless steel hair
I
aluminium chip
I
end of grid wire too long (max. 2.5 mm)
I
check exposure supply 04PBA01
I
check exposure setting
I
check exposure sensor 04PBA02 with SDS
I
test +2, -4 (See Faults
(irregular
page 8
)
page 7 )
page 33 )
Faults 9