Canon Fax-L260i, Service Manual

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FAX-L260i Chapter 2: Technical Reference
(1) When receiving with G4, the received data is sent through the ISDN terminal, Transformer, and ISDN interface
IC to the multi-protocol serial controller IC. When receiving with G3, the received data is converted to analog
data by the PCM coded IC, and after being demodulated by the MODEM IC, is sent to the multi-protocol serial
controller.
(2) The image data is converted from serial data to parallel data by the multi-protocol serial controller, and then
stored in DRAM.
(3) After the encoded image data is decoded to one-time raw data by soft codec in the MPU, it is again written to
DRAM.
(4) The encoded image data passed through the centronics interface, is DMA forwarded and written to the SCNT
board’s DRAM.
(5) The encoded image data is decoded to raw data by the system controller IC.
(6) The system controller IC then converts the resolution of the fax data to the appropriate resolution for the printer
data, and send it to the printer controller IC on the PCNT board.
(7) The printer controller IC prints data by controlling the main motor, LASER, and high voltage according to the
received print data.