Safety; Main Controller; Outline; Overview Of The Block - Canon LBP5050 Series Service Manual

Main motor
Pickup motor
Fixing motor
NOTE:
DC is an abbreviation of "DC motor" and SP is an abbreviation of "stepping motor".

2.8.1.3 Safety

LBP5050N / LBP5050
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

LBP5050N / LBP5050
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.
GDI (graphics device interface)
It is a graphical interface used in a Windows environment for printing and screen display (also for the application being in use).

2.8.2.2 Overview of the Block

LBP5050N / LBP5050
Description
M701 Photosensitive drum, developing cylinder, ITB
M702 Pickup roller, feed roller
M703 Pressure roller, delivery roller
GDI data transmission
from application
Analyzes GDI data for
generation of print data
Forms bit images
Engine
Print
T-2-7
Driving parts
T-2-8
Host computer
Canon Advanced Printing Technology
Displays on screen
Monitors printer status
Host computer interface
Printer interface
Print status information
F-2-22
T-2-9
Failure
Type
detection
DC Yes
SP No
SP No
Printer
Chapter 2
0018-6328
0019-3072
0019-3095
2-17