Outline Of Electrical Circuitry - Canon NP6621 Service Manual

OPERATIONS AND TIMING
B. Outline of Electrical Cir-
cuitry
The machine's most electrical mechanisms are
controlled by the microprocessor on its DC controller
PCB. The microprocessor reads the input signals
from the sensors and operation keys according to
Sensor
AE sensor PCB
Main thermistor
Sub thermistor
Control panel
Control card (accessory)
Sensor
3–2
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DC controller PCB
Composite power supply
+5V
Q301
+24V
CPU
+34V
Q307
ROM
Q308
RAM
Q311
IPC
(accessory)
Cassette driver PCB/
Paper deck driver PCB
Figure 3-102
COPYRIGHT © 1998 CANON INC.
its pre-programmed instructions and sends signals
to drive such loads as motors, solenoids, and lamps
as necessary.
The machine's microprocessor is capable of
reading analog signals as well as digital signals
using its A/D converter.
Heater driver PCB
CPU
Scanning lamp
Toner level
detection
High-
voltage
circuit
Bias PCB
HV
Main motor
M1
Main motor
driver PCB
Pre-exposure lamp
LA
Scanner motor
Motor
Lens motor
Heat exhaust fan, Feeding fan,Scanner cooling fan
Fan
Change solenoid
Multifeeder holding plate solenoid
Blanking shutter solenoid
SL
Primary charging roller cleaning solenoid
Transfer charging roller release solenoid
Duplexing change solenoid
Registration clutch
Duplexing registration clutch
CL
Pick-up clutch 1, 2
Multifeeder pick-up clutch
Cassette unit motor
Motor
Paper deck motor
Cassette pick-up clutch
CL
Deck pick-up clutch
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Fixing roller
heater
RDF (accessory)
Sorter (accessory)
Developing cylinder
Transfer charging
Static eliminator
Primary charging
Duplexing motor