How The Imagepass Operates; Figure 2: Functional Diagram - Canon imagePASS-A2 Service Manual

How the imagePASS operates

External
devices
Dongles/
USB flash
drives
Networked
computers
I
NTRODUCTION
When a customer prints, the motherboard and copier interface board process image data.The
copier interface board is a custom board and allows the imagePASS to communicate with the
copier. The CPU, which is located on the motherboard, controls the transfer of image data to
and from the motherboard and runs the interpreter. DIMMs, which are also located on the
motherboard, hold image data during printing.
The interpreter rasterizes the page description file and compresses the image pattern into
memory using compression technology. The interpreter outputs the compressed raster data
through the image frame buffer memory to the copier interface board. The raster data is sent
to the copier, which then renders the image on paper at maximum speed.
Motherboard
Memory
DIMM 1
DIMM 2
USB 2.0 (x4)
Intel 3100
Network port
Upper RJ-45
Straight-through
cable
FAN 1
FAN 2
Functional diagram
F 2:
IGURE
imagePASS
CPU
SATA 6 SATA 4 SATA 2
SATA 5 SATA 3 SATA 1
Unused slot
PCI-E
Copier
interface
Copier interface
Lower RJ-45
Crossover
cable
Super
I/O
Power supply
AC power
HDD
PCI-E
+3.3/+5/±12V DC
8
Copier
PCI bus