Dc Controller Pcb - Canon imageCLASS D600s Service Manual

The volume of the line monitor or the sound of the key sound or the error
sound is adjusted in user mode.
Memo
Communication Control Block (if equipped with fax functions)
The communication control block detects line signals (CNG, DTMF). The 14.4-kps mo-
dem is controlled by the main CPU on the processor PCB for modulation and demodulation
of transmission/reception data. It also is used to send the DTMF signal.

1.3.2.2 DC Controller PCB

Fixing Heater Control Block
The fixing heater control block monitors the temperature reading of the thermistor to en-
sure that the temperature of the heater reaches a specific level. If an error is detected in the
temperature of the heater, it stops the power to the heater.
High-Voltage Control Block
The high-voltage control block controls the high voltage for the primary charging roller
and developing roller of the cartridge and the high voltage applied to the developing cylin-
der, transfer charging roller, and fixing film.
Drive Control Block
The drive control block controls the main motor, pickup solenoid, and heat discharge fan.
Sensor Detection
It detects the state of the sensors in the pickup assemblies and the printer unit, thereby
monitoring the drive assembly.
Image Processor PCB Interface Assembly
The image processor PCB interface assembly sends the horizontal sync signal (BD0*) to
the image processor PCB. It also returns a state signal in response to a command signal (se-
rial) from the image processor PCB, thereby communicating the state of the printer unit to
the image processor PCB.
Laser Control Block
The laser control block controls the drive of the laser diode of the laser scanner unit ac-
cording to the image signals (VD0, VD0*) from the image processor PCB. Also, it controls
the intensity of the laser diode (auto power control) for each line of print data.
Horizontal Sync Signal Control
When the laser beam reaches the horizontal print start position, the laser beam detection
signal (BDI*) from the laser scanner unit is detected, and the horizontal sync signal (BD0*)
is sent to the image processor PCB. Also, the horizontal sync signal (BD*) is monitored for
frequency of output.
COPYRIGHT © 2001 CANON INC.
Chapter4.p65
CANON imageCLASS D600s/PC1060s/PC1200s/iR1200s REV. 0 SEPT. 2001
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CHAPTER 4 OPERATION
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