Ibt Ii - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500

2.5.9 IBT II

2ND BTR ASSY
The 2ND BTR ASSY consists of the following parts:
2ND BTR
2ND BTR CLEANER
Detack Saw (discharge plate)
The 2ND BTR (Second Bias Transfer Roll) is a conductive roll that
sandwiches the IBT BELT ASSY from the outside together with BACK UP
ROLL, induces a charge with the voltage supplied by the BACK UP ROLL,
and transfers the toner image on the IBT BELT ASSY to paper (secondary
transfer).
The 2ND BTR CLEANER scrapes toner from the surface of the 2ND BTR
and collects the toner in a space inside the 2ND BTR ASSY.
The Detack Saw (discharge plate) allows the charge to escape to the
reverse side of the paper, and neutralizes/eliminates the charge of the
paper.
2ND BTR CAM ASSY
2ND BTR CAM ASSY consists of the following parts.
BTR CAM CLUTCH
BTR WHEEL SENSOR
BTR CAM ASSY
The BTR CAM ASSY transmits drive from the P/H MOTOR ASSY to the
2ND BTR CAM ASSY via the P/H DRIVE ASSY, and controls the advance
(IBT BELT ASSY and 2ND BTR CLEANER make contact) and retract (IBT
BELT ASSY and 2ND BTR CLEANER do not make contact) of the 2ND
BTR ASSY.
The BTR WHEEL SENSOR detects the BTR WHEEL of the BTR CAM
ASSY, and monitors the advance/ retract condition from the BTR CAM
ASSY stop position (the CAM position).
Operating Principles
The BTR CAM ASSY, by operating the BTR CAM, make the advance /
retract of the 2ND BTR CAM CLUTCH carry out .
BELT CLEANER ASSY
The BELT CLEANER ASSY consists of the following parts:
Cleaning Blade
Auger
The Cleaning Blade makes contact with the IBT BELT ASSY after the
secondary transfer step and scrapes residual toner from the IBT BELT
ASSY.
Revision C
2-35