Gestetner B003 Service Manual page 751

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.
FACE (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 controll
Modem (R288F-29)
• V.34, V33, V17, V.29, V.27ter, V.21, and V.8
B003/B004/B006/B007
SG3 ISDN
CPU BUS
CPU
(RU30)
NCU
Function
Upgrade Unit
(512 kB)
SRAM Flash ROM
(512 kB) (3 MB)
FACE
DCR VIF
DMA BUS
DRAM
(8 MB)
DIMM
(32 MB)
4-2
FBI MB
B360D510.WMF
SM