Ricoh A250 Service Manual page 418

VIDEO DATA PATH
1.4.2 RECEPTION
Analog G3
NCU
FCU
D e c o m p r e s s i o n
Image Rotation
First, the FCU stores the data from either an analog line or an ISDN line to the SAF
memory. (The data goes in parallel to the FACE, and is checked for error
lines/frames.)
The FCU then decompresses the data and transfers it to page memory. If image
rotation is possible, the image is rotated in the page memory. The data is
transferred to the BiCU.
JBIG Reception
When the machine receives data compressed with JBIG, the data is sent to
EXFUNC for decompression. Then the data is stored in the page memory, and
transferred to the BiCU.
A250
ISDN G3
CiG4
Modem
SAF Memory
EXFUNC Board
FACE
QM-CODER
(DCR)
(Optional)
Page Memory
FACE
(VIF)
BiCU
Printer
1-10
ISDN G4
CiG4
FACE
(DCR)
Error Check
JBIG
c o m p r e s s i o n
A891V502.WMF
SM