Ricoh C211 Service Manual page 677

CUSTOMER SERVICE GROUP
BULLETIN NUMBER:
APPLICABLE MODEL: VT2105
SUBJECT: INK ON LEADING EDGE OF COPIES
SYMPTOM:
During a long printing run, ink appears at the leading edge of copies. At first, it is very hard to see, but it
becomes more visible as the printing continues.
CAUSE:
Due to rough paper edges, the master becomes damaged.
Just when the leading edge of the paper is positioned under the drum, it is pressed against the drum
surface, so that the master is wrapped around by the press-roller. Due to this repeated action, the master's
surface, where the paper leading edge contacts, is gradually torn.
Also, if the paper generates a lot of paper dust, it is accumulated on the press-roller surface and damages
the master in the same manner.
Normally, even if the master is damaged, ink does not exist around the area beneath the master where the
paper leading edge contacts (there are no holes in the metal screen). However, after a long printing run, ink
leaks onto this area and is transferred to the paper through the damaged part of the master.
SOLUTION:
1. Change the paper type. Re-setting the paper on the paper feed table up side down so that the rough
edge of the paper faces downward may also solve the problem.
2. Change the image position on the paper slightly using the IMAGE SHIFTING key before the leading
edge of the paper becomes dirty with ink.
3. Cover the leading edge part of the cloth screen on the drum with tape, so that ink does not leak eve n
when the master is damaged. See page two (2) for installation instructions for the tape.
TECHNICAL SERVICE BULLETIN
VT2105 - 009 10/15/96
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