Canon FAX-L1000 - Manual (Page 588)

5-230
FAX-L1000 Chapter 5: Appendix
b.Image Signal
(1) The image signal (nVDO) is sent from the PDL board to the TWINS board selector
IC.
(2) The image signal (nVDO) from the fax (SCNT board) and the image signal (nVDO)
from the printer (PDL board) are switched by the selector IC.
(3) The nBD and nTOP signals from the ECNT board are separated by the TWINS board
and sent to the SCNT board and the PDL board. However, with facsimile printing, the
signal which would be sent to the PDL board is switched by the selector ICD on the
TWINS board so that it is not sent to the PDL board. With printer printing, it is
switched so that it will be sent.
Figure 5-91 Flow of Print Data 2
•Control Panel
The PDL board also controls the printer operation buttons. All communication between the
buttons and the PDL board is done via the SCNT board.
nBD,nTOP
3
TWINS Board
SCNT Board
PDL Board
ECNT Board
Ethernet Board
nVDO
PDL data from Network
PDL Data from PC
nBD,nTOP
nTOP,
nBD
Selector
IC
System
controller
IC nVDO
Selector
IC
2
1
Select signal
TWINS
IC