Laser Driver/Bd Pcb; Scanner Motor Pcb; Printer Controller Pcb - Canon imageCLASS D600s Service Manual

1.3.2.7 Laser Driver/BD PCB

The image signals (VD0, VD0*) from the image processor PCB is converted into data
used for laser adjustment (to cause the laser diode to emit a laser beam). Also, the generated
laser beam is detected, and the laser intensity detection signal (BDI*) is sent to the DC con-
troller PCB.

1.3.2.8 Scanner Motor PCB

The scanner motor is driven according to the drive signals from the DC controller PCB.
1.3.2.9 Printer Controller PCB (if equipped with printer functions)
The communications with the PC are controlled. The image data from the PC is converted
into print data for the machine, and is sent to the image processor PCB.
Communication Control
Communications with the PC are controlled using a bi-directional parallel I/F (IEEE Std
1284-1994) or USB (Ver. 1.1). The communication protocols used for bi-directional com-
munications include: Nibble, ECP, Rapid Port.
The communication with the image processor PCB by means of a video I/F are also con-
trolled.
USB serial number Notice Function
The USB serial number is communicated to the PC.
Smoothing
The 300 x 300-dpi image data from the PC is converted into image data equivalent of
1200 x 600 dpi; or, 600x600-dpi image data is converted into data equivalent of 2400x600-
dpi.
COPYRIGHT © 2001 CANON INC.
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