
1.5.2. Reception *
Data from the line passes to the modem through the NCU and hybrid IC. Af-
ter the modem demodulates the data, the decompressed data passes to the
DCR block, through either the FIFO or the ECM memory, where the data is
decompressed to raster image data. At the same time, the compressed data
passes to the SAF memory as a backup in case of mechanical problems dur-
ing printing (substitute reception).
The raster image data is then passed to the page memory for printing. After a
page of data has been stored in the page memory, the data is sent to the
LDDR through the LIF block.
Copy Paper
DATA/ADDRESS BUS
E144EFXL
Modem
Amplifier
FCIP
MDM
DCR
LIF
HIC
NCU
From the Network
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
Page
Memory
DRAM
LDDR
LIF: Laser Interface
DCR: Data Compression & Reconstruction
MDM: Modem
H516V508.wmf
August 2nd, 1995
OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-17