Boards; Fcu - Gestetner B130 Service Manual

4.2 BOARDS

4.2.1 FCU

DMA BUS
CPU BUS
LINE LSD
The FCU (Fax Control Unit) controls the fax communications, the video interface
(with the copier BICU), and the fax option.
FACE3 (Fax Application Control Engine):
• CPU
• Data compression and reconstruction (DCR)
• DMA control
• Clock generation
• DRAM backup control
• Ringing signal/tone detection
FAME (Ricoh Modem):
• V.34, V.33, V.17, V.29, V.27ter, V.21, and V.8
LSD (Line Side Device):
• Data transfer
• Line control
SM
CÓPIA NÃO CONTROLADA
DRAM
(16MB)
SRAM
FAME
(128 KB)
Monitor
Speaker
77
CÓPIA NÃO CONTROLADA
FCU
FACE3
MBU
FROM
(3 MB)
BOARDS
Controller
B620D901.WMF
Fax Unit