Epson AcuLaser C8500 Service Manual page 104

EPSON AcuLaser C8500
Figure 2-34. Transportation I - 2
Operating Principles
2.5.4 MSI/Paper Transportation II
MAIN P/H FRAME ASSY
The MAIN P/H FRAME ASSY consists of the following parts:
P/REGI. ROLL ASSY
REGI. CLUTCH ASSY
PRE-REGI. CLUTCH ASSY
REGI. SENSOR
OHP SENSOR
REGI. METAL ROLL
REGI. RUBBER ROLL ASSY
The REGI. METAL ROLL and REGI. RUBBER ROLL ASSY feed paper in
synch with IBT BELT ASSY operation so that the complete toner image on
the IBT BELT ASSY is correctly positioned on the paper.
The P/REGI. ROLL ASSY transports paper from the MSI ASSY to the
REGI. METAL ROLL and REGI. RUBBER ROLL ASSY. The paper rear is
also transported during the time when the top edge of the paper reaches
the REGI. METAL ROLL and REGI. ROLL ASSY, and the REGI. METAL
ROLL and REGI. ROLL ASSY turn, a loop is created for the paper, and
paper edge skew is corrected.
The REGI. CLUTCH ASSY transmits drive of the P/H MOTOR ASSY to the
REGI. METAL ROLL and REGI. RUBBER ROLL ASSY, and matches the
paper with the secondary transfer position of the IBT BELT ASSY.
The PRE-REGI. CLUTCH ASSY transmits drive of the P/H MOTOR ASSY
to the P/REGI. ROLL ASSY.
The REGI. SENSOR detects when the top edge of the paper reaches the
REGI. METAL ROLL and REGI. RUBBER ROLL ASSY. The REGI.
SENSOR also detects the rear edge of the paper in order to determine the
size of the paper. (Paper size is determined from the time between when
the REGI. CLUTCH turns ON until the REGI. SENSOR no longer detects
paper.)
Revision C
2-27