Ricoh Aficio FX10, Service Manual

Page: 21 / 284

1.5. VIDEO DATA PATH
1.5.1. Transmission
Immediate Transmission:
Scanned data form the contact image sensor passes to the DIP block in the
FCIP2. After analog/digital video processing, the DCR block compresses the
data for transmission. The compressed data then passes either to the FIFO
memory or to the ECM memory, before it is sent to the telephone line through
the modem.
Memory Transmission:
First, the scanned data is stored in the SAF memory after compression in the
DCR block.
At the time for transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other ter-
minal is done. The compressed data then passes either to the FIFO memory
or to the ECM memory, before it is sent to the telephone line through the mo-
dem.
Contact Image Sensor Assembly
FCU
To the network
Xenon Lamp
Original
Video
Processing
Memory
FCIP2
DIP
DCR
Amplifier
MDM Amplifier
DATA/ADDRESS BUS
DRAM
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
Attenuator
HIC
NCU
Image Sensor
DIP: Digital Image Processor
DCR: Data Compression and Reduction
MDM: Modem
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June 10th, 1997 OVERALL MACHINE INFORMATION
VIDEO DATA PATH
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