Nip Band Width Adjustment; Procedure - Ricoh A66 Service Manual

9.13 NIP BAND WIDTH ADJUSTMENT

9.13.1 Procedure

[A]
NOTE: 1) Check and adjust the nip band width only after the copier has
warmed up.
2) Place an OHP sheet (Folex 100 or equivalent) on the by-pass
feed table before starting this procedure.
3) Use only A4/LT sideways (if you use an OHP of other sizes, a
paper jam will occur).
4) If the copier is connected with the sorter, disconnect the sorter
connector and remove the sorter, otherwise a paper jam will occur
after ejecting the OHP sheet.
1. Enter the SP mode and measure the fusing nip band width (SP1-109).
2. When the OHP sheet is ejected, measure the nip width of the bands.
1) On the sheet locate the nip bands [A].
2) Use a rule to measure the width of the slightly opaque area on the
OHP sheet.
3) If the slightly opaque area has notched boundaries, measure the
narrower width.
4) For both edges of the OHP sheet, measure the width 10 mm away
from the edge.
3. Calculate an average of the width of the three bands at the front, rear and
center on the OHP sheet. The center average should be 6.5 ± 0.5 mm
and the deviation between the edges should be no more than 0.5 mm.
4. If the measured nip width does not correspond to the standard value,
adjust the nip width by using the pressure roller screw [B].
Then repeat steps 1 to 4 until the width is correct.
A166/A187/A189
PAPER TRANSPORT AND FUSING
5-86
[B]
SM