Canon LBP-2000 Service Manual Page 46

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CHAPTER 2
II. ENGINE CONTROL SYSTEM
A. Outline of the Electrical Circuitry
1. Outline
The sequence of operation of the Printer is controlled by the CPU found on the DC controller PCB.
When the power switch is turned on and the Printer enters standby state, the CPU generates
signals to drive such loads as laser diodes, motors, and solenoids in response to the print start
command and image data from an external device. The following is a block diagram for the cir-
cuitry:
Fixing
assembly
High-voltage
power supply
circuit
Cartridge
Low-voltage
power
supply
circuit
DC controller PCB
+5V
AC input
Laser driver
Video
controller
Scanner motor
BD circuit
Clutch
Solenoid
Paper feeder
(option)
Reset IC
+24V
Power supply assembly
Heat
discharging fan
Main motor
Heater
control circuit
+3.3V
Sensor
Sensor
Sequence control circuit
Main motor control circuit
CPU
ASIC
Image control
circuit
Scanner motor
control circuit
High-voltage
control circuit
Video interface
control circuit
Figure 2-2-1
Download Service Manual And Resetter Printer at http://printer1.blogspot.com
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