Nip Band Width Measurement (Sp1-109) - Ricoh Russian-C2a Service Manual

SERVICE PROGRAM MODE

4.2.11 NIP BAND WIDTH MEASUREMENT (SP1-109)

When paper wrinkling or image off-set occurs, the pressure from the pressure roller
can be adjusted by changing the position of the pressure springs. At this time, the
nip band width can also be checked with SP1-109, as follows.
1. Do a free run (SP5-802) for about 50 sheets.
2. Access SP1-109 and press the "1" key.
3. Press Copy Window to return to the copy window.
4. Place an OHP sheet (A4/8.5"x11" sideways) on the by-pass tray or in the 2nd
paper tray.
5. Press the "Start" key.
The OHP sheet is stopped in the fusing unit for about 20 seconds, then it will
be fed automatically.
6. Check the nip band width [A]. The relationship between the position of the
pressure spring and the band width is as follows.
NOTE: Check the nip band width around the center of the OHP.
1. Pressure spring position
Upper (default position)
Lower
2. Envelope feed mode (green lever down) at the
default pressure spring position
If the width is out of the above specification, the pressure spring should be
replaced.
OHP
B027S513.WMF
4-70
10 August, 2001
[A]
Nip band width
± 0.5 mm
5.2
5.3 ± 0.5 mm
± 0.5 mm
4.7