Dc Controller Pcb - Canon iR1600 Service Manual

i. Speaker
The machine allows the control of the sound generated by the speaker in response to an
error or button operation (on/off) and of the volume of the sound.
To control the volume of the sound, change the settings in user mode.
Memo

1.2.2 DC Controller PCB

a. Fixing Heater Control Mechanism
The fixing heater control mechanism monitors the readings of the thermistor mounted to
the fixing heater and the level of direct current from the power supply in relation to voltage,
thereby causing the temperature of the fixing heater to reach a specific level. It also cuts off
power to the fixing heater in response to an error in the heater temperature.
b. High Voltage Control Mechanism
The high voltage control mechanism is used to control the high voltage applied to the pri-
mary charging roller and developing cylinder of the toner cartridge and the transfer charg-
ing roller of the toner transfer assembly.
c. Drive Control Mechanism
The drive control mechanism is used to control the main motor, pickup solenoid, and de-
livery fan.
d. Sensor Detection Mechanism
The sensor detection mechanism is used to check the sensor state of the printer unit and
pickup assembly to monitor the drive mechanism.
e. Image Processor PCB Interface Mechanism
The image processor PCB interface mechanism sends the horizontal sync signal (BDO*)
to the image processor PCB. Also, it returns status signals in response to the command sig-
nal for serial communications coming from the image processor PCB to communicate the
state of the printer unit to the image processor PCB.
f. Laser Control Mechanism
The laser control mechanism controls the drive of the laser diode of the laser scanner unit
according to the print data from the image processor PCB. Also, it performs laser power
auto control (auto power control) for each line of print data.
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002
CHAPTER 2 BASIC OPERATION
2-3