Operation Of Individual Blocks - Canon LBP5000 Series Service Manual

Option
Manual feed slot paper sensor
Cassette paper sensor
Registration paper sensor
Paper width sensor
Pre-fixing paper sensor
Fixing delivery paper sensor
Pressure alienation sensor
Color misregistration sensor
Color misregistration
/Density sensor
Environment sensor
Pick-up solenoid
Bk developing cylinder
drive solenoid
MCY developing cylinder
drive solenoid
Low-voltage power
Low-voltage
power supply
AC input
Fixing control
Fixing unit

2.8.2.2 Operation of Individual Blocks

LBP5000 / LBP5100
a. CPU(IC7)
The CPU is a 16-bit single chip microcomputer.
The CPU is a one-chip CPU with built-in ROM and RAM. The machine controls the following printer operation in keeping with the control programs stored in
ROM:
1) printer engine sequence control
2) ASIC control
3) fixing control circuit control
4) fixing assembly control
5) pickup motor, fixing/delivery motor control
6) fan motor control
7) control of various solenoids
8) control of various sensors/switches
9) control of accessories
b. ASIC (IC8)
The ASIC (application-specific IC) is used for IC, memory, and external device interfaces, and is used to control the following printer operations in keeping with
the instructions from the CPU:
1) control of laser/scanner block
2) communication with video control
3) control of high-voltage power supply PCB
4) control of main motor
SL
SL
SL
supply unit
+2.5V
+3.3V
+5V
circuit
+24V
circuit
DC controller PCB
IC7
CPU
IC8
ASIC
IC6
IC5
Reset IC EEP-ROM
F-2-40
M
Pick-up motor
M Fixing/Delivery motor
Fan
Main motor
M
Laser/Scanner unit
Scanner motor
Laser driver
ETB unit
Transfer roller
High-voltage power supply PCB
Door open
SW
detection switch
EP cartridge
Primary charging roller
Developing cylinder
Photosensitive drum
Memory tag
Memory controller
Video controller PCB
Chapter 2
0010-6172
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