Ricoh FT4460, Service Manual, Page: 385 / 413

28 February 1989
3.3 SORTER PAPER STACKING PROBLEM (A3/LDG Tracing
Paper)
- Phenomenon -
A3 (LDG) tracing paper copies do not always feed correctly into the sorter
bins.
- Possible Cause -
A3 (LDG) tracing paper is not very stiff. When stacked to feed in the short
grain direction, sheets sometimes bend or curl so that they do not feed
smoothly into the sorter inlet.
- Action -
Stack A3 (LDG) paper in the long grain direction.
3.4 DIRTY BACKGROUND (Blue Development Unit)
- Phenomenon -
1. After developer is replaced, a dirty background may appear on the first
few copies.
2. After replacing the toner cartridge, dirty background copy may appear on
the first few copies with originals that have a small amount of black image.
- Possible Causes -
1.
2.
Blue toner is higher in fluidity (attracted more easily to the drum surface)
than other toner colors when it is new.
The color development unit is smaller than that of other copiers;
consequently, the triboelectric charge is weaker.
- Actions -
1 After installing a blue development unit or replacing blue developer,
make about five blue copies.
2 If a dirty background appears at any other time, make three solid blue
A4/LT size copies to decrease the toner density.
NOTE: This dirty background is usually very faint, i.e. difficult to see.
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