Canon Color imageRUNNER C4580 Service Manual - page 123
Chapter 4
4-3
T-4-1
IC No.
ASIC
Name
Main Function
IC1
IMG(Y)
1. Image processing
Receives the image data from the controller.
Send the image data to the PM1100 (PWMIC).
Setup each image setting (e.g., laser write start timing, flame)
via PM110 (PWMIC).
2. Laser Scanner Motor Control
3. Laser Driver Control
IC2
IMG(M)
IC3
IMG(C)
IC4
IMG(K)
IC5 to 8
PWM(Y) Execute the pulse width modulation depending on the
density of the image data that is received in parallel, and
output.
5 to 8: For A to D beams of the Y laser.
9 to 12: For A to D beams of the M laser.
13 to 16: For A to D beams of the C laser.
17 to 20: For A to D beams of the K laser.
IC9 to 12 PWM(M)
IC13 to
16
PWM(C)
IC17 to
20
PWM(K)
IC21
CPU
-
IC22
EEPROM Embedded startup program. (BOOT is embedded.)
IC23
SRAM
Retain the setup data of the service mode.
IC24
FLASH
ROM
Store the firmware.