Ricoh D093 Service Manual page 301

If LPH 2 is lower than LPH 1, set a smaller value.
2. Print one more pattern with SP2952-11) and check the alignment at the joints.
3. Do this procedure again until the pattern at the joint is correct.
4. Do SP2952-12 for LPH 2-3
Adjust the position of LPH 3 to LPH 2 (LPH 2 is the standard).
If LPH 3 is higher than LPH 2, set a larger value.
If LPH 3 is lower than LPH 2, set a smaller value.
5. Do this procedure again until the pattern at the joint is correct.
The hot roller and pressure roller have a slight spindle shape. The circumference at the ends of
the rollers [C] is slightly larger than the circumference at the centers [D]. This arrangement
ensures that there is always sufficient pressure on the paper between the roller ends.
However, this difference in circumference also causes a small difference in the speed of paper
feed. The paper transport speed at the ends is slightly faster than at the center. Because the
centers of the rollers bend in slightly, this also increases the risk of slippage at the center with
paper narrower than 420 mm.
For operators who frequently use paper wider than 420 mm, do the sub scan adjustments
for the LPH joints with SP2952-11, -12.
For operators who frequently use paper that is less than 420 mm wide, do the sub scan
adjustments for the LPH joints with SP2952-51, -52 after you input the values of SP
2952-11 and -12 from the decal.
SM 5-119
Special Adjustments
D093/D094