EPSON AcuLaser C1100 Revision B

OPERATING PRINCIPLES Control 113

2.8.4 Belt position control
In full color printing, positioning control of the images on the Belt is necessary so that
the 4-color toners can be transferred to the same position to enable correct overlay of
the 4-color toners. SENSOR TR-0 is an optical reflective sensor, and reacts to the
silver sticker attached on the Belt for position detection. The output level of the Sensor
changes at the position of the silver sticker for each one revolution of the Belt. This
change is used to control the position of the Belt.
2.8.5 Adjustment of the FUSER fixing temperature
The temperature of the surface of the Heat Roll is controlled so that the toner images
formed on the paper surface can be appropriately fixed to the paper. The surface
temperature of the Heat Roll is detected by a non-contact type Temp Sensor. By
turning the Fuser Lamp ON or OFF, it can be adjusted to right temperature.
2.8.6 FUSER safety circuit
FUSER ASSY contains a contact type Temp. Sensor for detection of high temperatures
in addition to the non-contact type Temp. Sensor for temperature control. This Temp.
Sensor is located on the surface of the Heat Roll (the location where paper does not
contact). When the surface of the Heat Roll reaches an abnormally high temperature,
the Heater Relay in the Fuser Cont is turned OFF, and power supply to Lamp is cut.
2.8.7 Detection of service life of consumables and periodical replacement parts
Detection of service life of consumables
Toner cartridge
The operating time of the Dispense Clutch, that is operated to supply toner
from the Toner cartridge, is counted, and the printer detects near-end status of
cartridges when the counted time reaches a certain level. The printer judges
the end status of cartridges when the toner patch density that is read by the
SENSOR ASSY ADC does not reach the target density during execution of
process control.
Photoconductor Unit
The service life of the Photoconductor Unit is detected by followings
whichever comes first.
•Number of Drum rotations
•Full status of the Waste Toner Box
The judgement of near-end status of the Waste Toner Box is made when the
pixel counter reaches the specified value or when the Full Toner Sensor
detects that the Waste Toner Box is full. Then, the Full status is judged by
the specified amount of pixels counted by the pixel counter after the near-
end status.
Detection of service life of periodical replacement parts
HOUSING ASSY-DEVE (Developer Assy)
The printer causes Warning indication when the rest of MOT ASSY MAG's
life becomes less than 1,000 copies in terms of printed sheets of paper.
2ND BTR ASSY
The printer has not a special life counter for 2ND BTR ASSY. The
cumulative number of printed copies printed on the engine status sheet can be
the reference to decide whether the 2ND BTR ASSY reaches the end of its
life.
FUSER ASSY
The printer causes Warning (near-end) indication when the rest of FUSER
ASSY's life becomes less than 1,000 copies (the preset life is 100,000 copies)
in terms of printed sheets of paper.