Brother International MFC-7050C Service Manual - Page 28

Control, Panel, SDOUT, Reset, Circuit, Serial, Communications, Ports, Array, POWER, RESET,

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3.4 Control Panel PCB The control panel PCB and the main PCB communicate with each other by serially transmitting commands and data. The control panel unit consists of a gate array, an LCD and LEDs, which are controlled by the gate array according to commands issued from the control CPU on the main PCB. The calendar clock is backed up by the backup circuit on the main PCB. The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubber keytops. FAX Control Section Main PCB SDIN SDOUT PCLK Control Panel PCB Serial Communications Ports Gate Array I/O Ports +5V POWER LCD Panel FPC (Key Matrix) Reset Circuit > RESET LEDS Document front sensor Document rear sensor Control Panel PCB and its Related Circuit 111-17

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3.4
Control
Panel
PCB
The
control
panel
PCB
and
the
main
PCB
communicate
with
each
other
by
serially
transmitting
commands
and
data.
The
control
panel
unit
consists
of
a
gate
array,
an
LCD
and
LEDs,
which
are
controlled
by
the
gate
array
according
to
commands
issued
from
the
control
CPU
on
the
main
PCB.
The
calendar
clock
is
backed
up
by
the
backup
circuit
on
the
main
PCB.
The
panel
FPC
is
a
flexible
keyboard
PCB
which
integrates
the
key
matrix
having
rubber
keytops.
Main
PCB
Control
Panel
PCB
SDIN
SDOUT
PCLK
FAX
Control
Section
+5V
Reset
Circuit
Serial
Communications
Ports
Gate
Array
I/O
Ports
POWER
>
RESET
LCD
Panel
FPC
(Key
Matrix)
LEDS
Document
front
sensor
Document
rear
sensor
Control
Panel
PCB
and
its
Related
Circuit
111-17