Ricoh B264 Service Manual page 863

4.2 BOARDS
4.2.1 FCU
SAF
BACKUP
FCUIF
PCI BUS
FACE3
The FCU (Facsimile Control Unit) controls fax communications, the video interface
to the base copier's engine, and all the fax options.
FACE3 (Fax Application Control Engine)
• CPU
• Data compression and reconstruction (DCR)
• DMA control
• Clock generation
• DRAM backup control
Modem (FAME)
• V.34, V33, V17, V.29, V.27ter, V.21, and V.8
SM
SDRAM
(16MB)
DMA BUS
CPU BUS
SRAM FROM
(256kB) (3MB)
BACKUP
& RESET
MBU
CCUIF CCUDRV
G3 G3
111
DIMM
FCU
(32 MB)
v.34
MODEM
NCU
Circuit
Speaker
Drive
Speaker
BOARDS
Line
TEL
B779D902.WMF
B779