Canon NP-1015 Service Manual page 20

B. OUTLINE OF ELECTRICAL CIRCUITS
The major electrical operations of the copier are cohtrolled by the microprocessor on the
DC controller PCB. This microprocessor is programmed to read input signals from the sensors
and control panel keys, and to send commands to drive loads (motors, solenoids, lamps, and
..
other devices) in response at the necessary times.
For reference:
The microprocessor used in this copier incorporates an A/D converter enabling it to read
analog signals as well as digital signals. Signals marked by(A) in Figure 3-2 are analog signals.
Main motor M 1 is a synchronous type and runs at a speed determined by the AC line frequency.
Scanner drive motor M2 is a stepping type, and runs at a frequency determined by a crystal
controlled oscillator in the DC controller. Any variation of the AC line frequency will affect only
the main motor; this could result in compressed or elongated images.
DC
COntrollBr
r_________-L
1
(Photointerrupter) 1
I
I
Control panel LED
I
indicators
I
Solenoid
h LA
0
-cl
Driver
Exhaust
fan;
Scanner cooling fsn;
Feeder suction fsn
Regirtrat~on
roller clutch
Pick-up roller clutch
solenoid
Preconditioning exposure
lamp
Fixing roller heater;
Main motar;
DFIADF loptim);
Sorter Ioption)
Circuit breaker Main witch
-.\
Figure 3-2
,
3-2
COPYflIGHT 0 1980 CANON IMC.
CANON NP-I~l5/1215S RN.0 OCT. 1998 PRlNTE9 IN JAPAN IlMPlllM[ AU JAPON)