Canon iR3245, Service Manual

Page: 287 / 746

Chapter 9
9-5
9.3.3 Cleaning
9.3.3.1 Fixing Film Cleaning
0018-9784
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
Purpose
In the event of a jam or when wear on the fixing film advances, the fixing film is rotated idly for collection of toner from both the film and the pressure roller to the
cleaning roller.
The timing of control is as follows:
1) If the reading of the cleaning counter has exceeded the interval (expressed in terms of the number of sheets), the machine starts cleaning with the fixing motor
rotating at 1/2 speed.
The length, timing, and intervals of cleaning may be set in service mode: COPIER> OPTION> BODY> FIX-CLN.
Further, the cleaning counter reading is reset at the end of cleaning.
T-9-2
If a copy or print job arrives while cleaning is under way, the machine will not pick up paper until the ongoing cleaning ends.
If last rotation is under way in response to a rise in temperature at the film edge, the machine will hold cleaning until the end of the ongoing last rotation.
2) If a jam has been removed, the machine starts cleaning at time of recovery, at 220 deg C and for 10 sec.
9.3.4 Detecting the Passage of Paper
9.3.4.1 Detecting the Passage of Paper
0018-9785
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
F-9-4
DC-CON: DC Controller PCB
PS13: Fixing outlet sensor
When a delay jam of the fixing outlet sensor (PS13) occurs, the fixing motor (M3) is stopped immediately so as to prevent paper from wrapping around the fixing
roller.
The pressure of the fixing film and the pressure roller is released when a jam occurs so that jammed paper can be taken out easily.
0(Default) 1 2 3
Cleaning control temperature 0 225 225 225
Cleaning control time 0 60 60 60
Cleaning intervals 0 500 200 100
DC-CON
Deliv
er
y signal
J303-2
PS13