Canon FAX-L260i Service Manual page 77

b) Document scanning section
b-1) System controller (IC10)
The system controller IC include image processing function (UHQ) are as follows:
•Serial-to-parallel conversion
•A/D conversion
Input signals from the contact sensor are A/D converted.
•ABC(Auto Background Control)
Sets the slice level for each scan line.
•Edge enhancement processing
•Binaryzation processing
•Halftone processing
b-2) SRAM (IC11)
Used as a shading data buffer or an edge enhancement processing buffer.
c) Printer control section (PCNT board)
The printer control section is made up of the printer controller IC (IC 201). The printer controller IC is a
microcomputer that incorporates a Fujitsu MBCU34102-104 8kbyte ROM and a 256byte RAM. The
ROM contains printer control software to control LBP operations.
The printer control section receives commands from the system controller IC and controls paper pickup
and loading, the fixing heater, the high voltage required for primary charging, development, and transfer,
and the LASER/scanner unit.
The printer control section transfers the signal received from the printer section to the system controller IC
as printer status.
The printer controller IC has the following other functions:
•Main motor control
•Fixing heater control
•Fixing heater temperature detection
•BD signal detection
•LASER drive control
•Pickup solenoid control
•APC control
•Scanner motor, fixing ass'y, or BD failure detection
•Control of high-voltage power supply
FAX-L260i Chapter 2: Technical Reference
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