Boards; Fcu - Ricoh J-CF Service Manual

BOARDS

4.2 BOARDS

4.2.1 FCU

SG3
V.34
MODEM
Analog
Circuit
Monitor
Speaker
The FCU (Facsimile Control Unit) controls fax communications, the video interface
to the base copier's engine, and all the fax options.
FACE2 (Fax Application Control Engine)
• CPU
• Data compression and reconstruction (DCR)
• DMA control
• Clock generation
• DRAM backup control
• Ringing signal/tone detection
FBI (FACE Bridge Interface)
• Interface between the PCI bus and the FACE
• DMA control
Modem (R288F-29)
• V.34, V33, V17, V.29, V.27ter, V.21, and V.8
ISDN
CPU BUS
CPU
(RU30)
Function
NCU
Upgrade
Unit
(512 kB)
SRAM Flash ROM
(256 kB)
(2 MB)
FACE2
DCR VIF
DMA BUS
DRAM
(8 MB)
DIMM
(32 MB)
4-2
21 December, 2001
MBU
FBI FCUIF
G307D510.WMF