Outline Of Electrical Circuitry - Canon iR1600 Series Service Manual

CHAPTER 2 BASIC OPERATION

1.2 Outline of Electrical Circuitry

The PCBs used to control the machine's major electrical mechanisms are as follows:
1.2.1 Image Processor PCB
The image processor PCB controls the machine as a whole:
a. Drive Control Block
The drive control block uses a motor control IC and motor driver IC to control the reader
motor of the reader unit.
b. Control Panel Control Block
The control panel control block uses a control IC and serial communications of the control
PCB to transmit/receive data, to receive statuses of the control buttons and originals, and to
send display signal to the control IC of the control panel PCB for indication by LEDs and
LCD.
c. Reader Control Block
The reader control block processes image data read from the CS unit, and stores the result in
the SDRAM by means of DMA (direct memory access).
d. Printer Control Block
The printer control block converts 600x600-dpi image data into print data. It then sends the
resulting print data to the printer unit in the form of image signals (VDO*, VDO) in response
to the horizontal synch signal (BDO*) coming from the printer unit.
e. Sensor Detection
The sensor checks mechanism monitors the state of the reader unit and ADF to monitor the
drive mechanism.
f. Energy Save Control Mechanism
The energy save control mechanism controls the energy save function (ESS) used to de-
crease the power consumption while the machine remains in wait state.
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COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002