Ricoh FT4460, Service Manual, Page: 209 / 413

28 February 1989
Item Explanation
Around Drum Charge Wires Dirty charge wires may cause uneven
image density. They should be
cleaned or replaced at regular inter-
vals.
End Blocks Toner tends to accumulate on the
corona end blocks, and this can result
in poor copy quality or even a high
voltage leak. Clean end blocks at
regular intervals.
QL
If toner accumulates on the QL, a dirty
background or a repeating negative
image may result. Regular cleaning
and periodic replacement are recom-
mended.
PTL If paper dust or toner accumulates on
the PTL, its efficiency may be reduced.
This can cause the image to be reat-
tracted to the drum during transfer,
resulting in reduced image density.
Clean the PTL at regular intervals.
ID Sensor If paper dust or toner accumulates on
the ID sensor, the image density will
be insufficient. Clean this sensor at
regular intervals.
Erase Lamp If toner accumulates on the erase
lamp, a dirty background may occur
that becomes progressively worse in
long copy runs. Clean this lamp at
regular intervals.
Cleaning Unit Cleaning Blade
A dirty or worn out cleaning blade will
cause black lines on copies and/or
scratches on the drum. The blade
must be replaced or cleaned at regular
intervals.
Cleaning Brush
A worn out cleaning brush will not
clean effectively, resulting in a dirty
background and damage to the clean-
ing blade. Replace at regular intervals.
4-49