Motor Control; Safety; Main Controller; Outline - Canon LBP7200Cdn Service Manual

Chapter 2
Symbol for component

2.8.1.2 Motor control

The printer has four motors. The motors are used for the media feeding and image formation.
Name
Drum motor
Developing motor
Registration motor
Fixing motor
Pickup motor

2.8.1.3 Safety

The printer detects the door open and close status by monitoring the door open detection sensors.
The DC controller stops driving the motors and solenoids if the sensor detects a door open.

2.8.2 Main Controller

2.8.2.1 Outline

The main controller receives print information from external devices (e.g., host computer) by way of interface cables. The information contains a CAPT command
used to communicate printer status and printer-specific characteristics and dot data, which is the result of conversion of print data by the host computer.
The data is sent to the DC controller circuit for control of laser diode activation.
If properly connected with a bi-directional interface, an external device may be used to check the printer status.
When printing is executed in a Microsoft Windows or Macintosh environment, CAPT (Canon Advanced Printing Technology) serves to reduce processing speed
and enhance the ease of operation to provide a user-friendly printing environment. To that end, CPU is designed for the following:
- The print data from the application is turned into dot data and sent to the printer without conversion into the printer's page description language (PDL).
- The printing environment may be checked and set on the host computer display by responding to dialog boxes.
- The printer status is indicated on the host computer screen: print end time, print paper movement, error status.
2-18
M1 Drum motor
M2 Developing motor
M3 Registration motor
Motor
M4 Fixing motor
M5 Pickup motor
M7 Scanner motor
FM1 Fixing/Fixing power supply cooling fan
FAN
FM2 Duplex cooling fan
SL1 Bypass tray pickup solenoid
SL2 Cassette pickup solenoid
Solenoid SL3 Developing separation solenoid
SL5 Duplex reversal solenoid
SL6 Paper feeder pickup solenoid
SR1 Paper feeder pre-registration detection sensor
SR2 Front door open/close sensor
SR3 Paper feeder paper detection sensor
SR4 Registration detection sensor
SR6 Developing HP sensor
SR7 Bypass tray pre registration detection sensor
SR8 Fixing delivery sensor
Sensor
SR9 Fixing pressure release sensor
SR10 Fixing loop sensor
SR12 Pre-registration detection sensor
SR13 Cassette paper detection sensor
SR14 Bypass paper detection sensor
SR15 Delivery full sensor
SR16 ITB pressure release sensor
CL1 Bypass tray feeding clutch
Clutch
CL2 Duplex feeding clutch
M1 Photosensitive drum, ITB
M2 Developing printer, developing disengagement assembly
M3 Registration roller
M4 Pressure roller, delivery roller, duplex feeding roller
M5 Pickup roller, multi manual feed feeding roller, multi manual feed pickup roller
T-2-6
Name
T-2-7
Driving parts
0021-4103
Failure
detection
Available
Available
NA
Available
NA
0021-4104
0021-4105