1.5.2. Reception (PSTN)
Data from the line passes to the modem through the NCU. After the modem
demodulates the data, the DCR block in the SCP decompresses the data
from either the FIFO or the ECM memory.
At the same time, the demodulated data is backed up in the SAF memory, in
case of mechanical problems during printing (this is known as substitute re-
ception).
The decompressed 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 LCP for printing.
CiG4-SV
CiG4
CODEC
Buffer
Memory
Scanner
NCU
Printer
Interface
Printer
(LDDR)
MFCE
Modem
SAF
Memory
Line Buffer
VPP4F
LPC
Page
Memory
ECM
Memory
FIFO
SCP
DCMMR
DCR
From
PSTN
H515V503.wmf
December 21st, 1995
OVERALL MACHINE INFORMATION
VIDEO DATA PATH
1-17
