Paper Feed/Eject Section - Canon FAX-L350 Service Manual

FAX-L350 Chapter 2: Technical Reference

4.5 Paper Feed/Eject Section

After toner is fixed in the fixing section, the recording paper is fed to either the face-up delivery slot or the
face-down delivery slot that is switched by the flapper. The user selects the setting of the flapper by the paper
delivery selector at the bottom left of the front panel.
All rollers from paper feed through paper ejection are driven by the main motor.
1. Paper eject sensor
An actuator is used to detect the leading edge of the recording paper that is fed towards the ejected paper.
The detection information is sent to the SCNT board.
2. Flapper
This flapper switches the direction in which the recording paper is ejected after toner is fixed.
3. Paper overflow detection
The paper overflow sensor on the face-down paper eject cover detects paper stack overflow in the face-down
delivery slot duling face-down output.
NOTE
NOTE
BD Malfunction
If the total number of sheets printed after turning the power ON is four or more, and BD is
out of the BD cycle for 2.0 seconds or more during laser drive while the scanner motor is
rotating at fixed speed, the printer controller judges this to be a BD malfunction.
Scanner Motor Malfunction
If the predetermined speed of rotation is not reached within 3.0 seconds of start of scanner
motor rotation, the printer controller detects a scanner motor malfunction and stops the
scanner motor.
The LASER/scanner unit contains parts that require adjustment that must be adjusted.
Never disassemble the LASER/scanner.
No-toner detection
The no-toner state is detected by the toner sensor (magnetic sensor) located on the pickup
roller shaft. If a toner cartridge is installed, the toner sensor touches the side of the cartridge.
The part of the cartridge which the toner sensor touches is made thinner to increase the
sensor output. When the toner sensor detects no toner, the sensor output goes low.
Cartridge detection
A microswitch detects cartridge presence and front cover open/closed. The microswitch is
structured so that it is shorted only when the cartridge is loaded and the front cover is closed.
2-14