Canon FAX L1000 Service Manual page 518

FAX-L1000 Chapter 5: Appendix
(1) The image is scanned by the contact sensor, and the analog image data is sent to the
SCNT board.
(2) The image processing IC (IC20) converts the analog image data from the contact
sensor into digital data.
(3) The digitized data is encoded by the CODEC IC in an MR with no compression
function, and transferred to DRAM (IC3) by high-speed DMA transfer.
(4) The MR encode data stored in the DRAM is transferred to the DRAM on the FAX-
L1000 ISDN Kit through the TWINS board.
(5) The MR encode data sent to the DRAM is converted to raw data by the slave CPU,
and then encoded into a format (such as MMR and JBIG) suitable for the remote
machine.
(6) The data encoded into MMR, JBIG, etc. is added with a header and sent to the ISDN
interface IC through a modular board.
(7) The encoded data is transferred to the ISDN line through the modular jack of the
FAX-L1000 ISDN Kit.
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