Xero. Control; Operation When Drum Cartridge Is Replaced; Drum Cartridge Life Detection Control - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500

2.7.7 XERO. Control

2.7.7.1 Operation when DRUM CARTRIDGE is Replaced

When the DRUM CARTRIDGE is replaced with a new one, the following image
is formed to prevent the Cleaning Blade touching the drum from reversing. By
bringing the image to the Cleaning Blade section without carrying out primary
transfer, the Cleaning Blade is prevented from reversing.
IMAGE WHEN DRUM CARTRIDGE IS REPLACED
The following image is formed the prescribed number of times (nominal 5
times). This is performed for a total of 3 colors: Yellow, Magenta and Cyan.
Figure 2-58. DRUM CARTRIDGE
Operating Principles

2.7.7.2 DRUM CARTRIDGE Life Detection Control

Life Detection
Life of the DRUM CARTRIDGE is affected by the total number of revolutions of
the drum. Life of the DRUM CARTRIDGE (drum) is detected by totaling the
number of Belt revolutions that can be obtained by TRO signal. Detection
conditions are as follows:
Table 2-5. DRUM CARTRIDGE Life Detection Control
Conditions
DRUM CARTRIDGE life warning
DRUM CARTRIDGE life over
NOTE: The count given above is a cumulative value incremented by 2 by
TRO signal while the PROCESS MOTOR ASSY is running. (The
drum turns twice per revolution of the Belt.)
PROCEDURES WHEN REPLACING
Be sure to perform the following measures after replacing
C A U T I O N
with a new DRUM CARTRIDGE. Performing these
procedures before replacement can lead to many types of
problems.
When life is over
Replace with a new DRUM CARTRIDGE.
For life warning
Replace with a new DRUM CARTRIDGE.
Revision C
Count
90,000 count
(standard value)
110,000 count
(standard value)
2-56