Filter
Top Products
H. Controlling the Primary Corona Roller Cleaning Mechanism
1. Outline
The copier’s primary charging roller is equipped with an automatic cleaning
mechanism.
The automatic cleaning mechanism cleans the primary charging roller during initial
rotation(INTR) after having made 250 or more copies, i.e., after executing transfer roller
release control five times.
2. Primary Charging Roller Cleaning Operation
The primary charging roller cleaning solenoid (SL4) on signal (PCLSLD) is generated
under the control of the microprocessor (Q301) on the DC controller PCB. In response
to the signal, the cleaning pad is butted against the roller for 2 sec, during which time the
cleaning roller makes about 4 rotations.
Figure 4-118
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
4-20
Primary charging roller
cleaning solenoid
Fulcrum Fulcrum
Cleaning pad
Primary
charging
roller
Drum unit Drum