Discharging; Belt Cleaning - Epson ColorPage EPL-C8000 Service Manual

EPSON EPL-C8000

2.7.8.3 Discharging

Discharging is to neutralize/remove the charge on paper after 2nd
transfer. It is done by applying high voltage from the HVPS to the
Detach Saw in the "2nd BTR Assembly.

2.7.8.4 Belt Cleaning

The belt surface must be clean for an image to be formed. The belt
surface is cleaned by the Belt Cleaner Assembly. The Belt Cleaner
Assembly needs to advance to the belt surface to clean it. The Belt
Cleaner Assembly Advance/Retract is controlled by the Cleaner Cam
Solenoid.
NOTE: To advance the Belt Cleaner Assembly, the system continuously
turns on the Cleaner Cam Solenoid. To retract the Belt Cleaner
Assembly, the system continuously turns off the Cleaner Cam
Solenoid. (The mode is changed by the P/H Motor Assembly
rotation.)
NOTE: If there is not sufficient time from when the Cleaner Cam
Solenoid is turned on from its off state—because there is not
enough time between the bottom edge of the previous image
and the top edge of the next image (for example, in a continuous
printing in the standard speed mode or B/W mode)—the Cleaner
Cam Solenoid stays ON and the Belt Cleaner Assembly
continue to be in the advanced position.
NOTE: The time required for the Belt Cleaner Assembly advance
operation is 1.0 seconds (standard speed mode) and 2.1
seconds (half-speed mode) since the Belt Cleaner Assembly
receives the Cleaner Cam Solenoid ON signal. The time
required for the Belt Cleaner Assembly retract operation is 0.9
seconds (standard speed mode) and 1.8 seconds (half-speed
mode) since the Belt Cleaner receives the Cleaner Cam
Solenoid OFF signal.
Chapter 2 OPERATING PRINCIPLES
Toner (excess toner) may be on the belt surface:
n Residual toner from the 2nd transfer.
n Residual toner from the Cin50% patch and BIAS development
bands.
n Untransferred toner on the belt because of a paper jam.
1. Belt Cleaning types
There are three types of belt cleaning
(a) Normal cleaning
The Belt is cleaned during a normal print operation. The
maximum printable area (18 inches in the process direction) is
cleaned.
(b) Irregular cleaning
An irregular cleaning is done when the Warm-up mode is started
(except recovering from an image generation error) after a
Cin50% patch or BIAS development bands have been
generated. One circumference of the belt is cleaned.
(c) Error cleaning
When the system is recovering from an image generation error,
toner may be on the belt; the belt is cleaned when the Warm-up
mode is started. One circumference of the belt is cleaned.
Rev. B
2-64