Xerox Document FaxCentre 165, Руководство по обслуживанию

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XEROX DFC165 & DWC 165c Service Manual
2-11
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 (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
Fig. 2-10 Block diagram of the motherboard
I/O channel
controller
Image
processor
to CCD
board
to NCU
board
Telephone
network
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
motor
to scanner
motor
to ink drain
motor
to the
parallel
port card
PC