Canon MultiPASS C530 Service Manual page 109

MultiPASS C530/C560 Chapter 2: Technical Reference
b) G3 Reception
(1) Image signals received by L1, L2, pass through the hybrid circuit in the NCU, and are amplified. The
modem demodulate these images, and writes them to the DRAM.
(2) The demodulated image data is generally recorded in DRAM, and after re-encoding is written to
DRAM as coded data.
(3) The system controller IC converts the decoded data from run-length data to raw data, and converts 8
dot/mm fax data into 360 dpi resolution converted printer data, and writes them to the DRAM.
(4) The system controller IC converts the resolution converted printer data to BJ printer head control
signals, and then sends the signals to the BJ print head, via the MPU & printer controller IC.
Simultaneously, the MPU & printer controler IC sends motor control signals to the carriage motor and
line feed motor, via the driver IC.
Carriage motor
BJ
Print head
a MODEM IC
b DRAM
c System controller IC
MPU
d
e MPU & printer controller IC
f
Driver IC(Carriage motor)
g
Driver IC(Paper feed motor)
(4)
f
(4)
e
(4)
a
Modem board
Figure 2-21 G3 Reception Image Signal Flow
(4)
(3)
(2)
d
b
c
(3)
(1)
NCU
(1)
board
2-30
g
(4)
Paper feed motor
SPCNT board