Ricoh C211 Service Manual page 637

4. Paper Feed Miss
< Phenomenon>
4-3. The image shifts vertically at about 2 or 3 cm as shown below.
* There is no problem at slow speeds, but the faster the speed is, the greater the
amount and occurrence of the vertical image shift.
< Possible causes>
1. Ink sticks to the lower second feed roller
[A] during duplex printing, and transport
ability of the roller is lowered. This causes
a vertical image shift of about 2 or 3 cm.
[A]
2. Incorrect movement of the upper
second feed roller [B] shaft delays the
upper second feed roller [B] contact-
ing the lower second feed roller [A].
[B]
[A]
< Countermeasure>
1. Clean the lower second feed roller [A].
If this phenomenon does not stop after
cleaning the roller, change the lower
second feed roller [A].
In
A
Normal
Abnormal
2-1. Remove and clean the upper second
feed roller [B] and its bushing [C], then
lubricate the bushing with grease.
2-2. If the spring [D] is stretched, replace it.
6-15