Belt Cleaning - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500

2.7.9.3 Belt Cleaning

An image cannot be properly formed if there is excess toner on the surface of
the Belt. To remove toner, etc., the BELT CLEANER ASSY advances and
cleans the surface of the Belt. Advancement and retraction of the BELT
CLEANER ASSY is controlled by the CLEANER CAM SOLENOID.
NOTE: To advance the BELT CLEANER ASSY, the CLEANER CAM
SOLENOID is ON continuously, and to retract the BELT
CLEANER ASSY, the CLEANER CAM SOLENOID is OFF
continuously. (The status is switched by operation of the FUSER
MOTOR ASSY.)
NOTE: There is very little time between the end of one image and the
beginning of the next. If there is not enough time to turn the
CLEANER CAM SOLENOID from OFF to ON (for example when
printing in the standard speed mode or B/W mode), it remains ON
and the BELT CLEANER ASSY remains advanced.
The following are specific examples of excess toner remaining on the surface
of the Belt:
Toner left over from ordinary printing at time of secondary transfer
Toner produced by Cin 50% patch or BIAS development band created
by process control
Toner formed on the Belt when paper jam occurs
Operating Principles
TYPES OF BELT CLEANING
Belt cleaning is basically classified as the following 3 types:
Ordinary cleaning
Cleaning carried out for maximum printable area (18 inches in processing
direction) while printing is carried out.
Special cleaning
Cleaning is carried out for 1 Belt cycle after Cin 50% patch or BIAS
development band is created by process control, and when WARM UP
mode begins (except during error recovery after an error occurred during
image forming).
Cleaning when error occurs
Cleaning is carried out for 1 Belt cycle when WARM UP mode begins
during error recovery after an error occurred during image forming (when
there is possibility of toner remaining on the Belt).
IBT CLEANER TONER BAND
When the paper of the size of the little width is used by the continuance, toner
which hasn't transcribed it into Cleaning Blade of BELT CLEANER ASSY
which confronts a non-authority paper part doesn't spread, and give Cleaning
Blade damage.
Therefore, when the paper of the size of the little width is used, makes toner
figure called an IBT Cleaner toner band on Belt, and damage to give to
Cleaning Blade by making this toner spread to Cleaning Blade is prevented.
Revision C
2-66