Canon iR5570 Series, Service Manual

Page: 107 / 684

Chapter 3
3-5
F-3-5
*1: After a shift to standby, the fixing target temperature is decreased in 5-deg C increments at specific time intervals. When a specific temperature is
reached, the fixing heater and the fixing motor are turned on and off to maintain the temperature.
T-3-3
3.2.3 Basic Sequence of Operation (at power-on; high-humidity start-up mode)
0009-6337
Interval Description
WMUPR (warm-up) From when the main power is turned on until the fixing roller
temperature reaches a
specific level and, in addition, the potential control of the
photosensitive drum ends.
CNTR (control rotation) The machine executes potential control of the photosensitive drum.
For each mode (i.e.,
copier, printer), the machine executes VD control (to adjust the
primary discharge
current) and Vl control (to adjust the laser output), and determines Vdc
(developing
bias).
PSTBY (print standby) The machine is in a state in which it is ready to accept a copy/print
request signal.
CNTR
WMUPR PSTBY
*1
Main power
switch ON
Main motor
(M2)
Drum motor
(M1)
Primary charging
Pre-exposure
LED (LED1)
Developing clutch
(CL1)
Developing bias
(DC)
Developing bias
(AC)
Pre-transfer
charging (DC)
Pre-transfer
charging (AC)
Separation
charging (DC)
Separation
charging (AC)
Fixing motor
(M3)
Fixing heater
(IH)
Laser
Transfer charging
Bias roller
75 sec or less (approx.)
215 deg C