2-10
602E52970
2.3.2 Block Diagram of the Motherboard
The motherboard controls the entire machine by means of a central processing unit
(CPU) which uses special circuits to handle four main functional units: the image
processor (for processing the scanned document), the motors and the E.M. (for
activating all the mechanical parts), the print head (for printing both received and copied
documents) and the modem (for controlling the signals to and from the telephone
network).
CPU
Modem
I/O channel
controller
Image
processor
to NCU
board
to console
board
Custom
component
ASIC
Step motor
driver
Step motor
driver
256 kB
EPROM
8 kB
static
memory
512 kB
dynamic
memory
to print
head
to print
head driver
to carriage
motor
to paper
and
scanning
motor
to the head
clearing
E.M.
Fig. 2-10 Block diagram of the motherboard
to contact
sensor
Telephone
network
Handset
All manuals and user guides at all-guides.com
Содержание DFC155
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