Brother International HL-3400CN Service Manual - Page 97
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CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS 2.3 2.3.1 Main PCB (Video Controller PCB) Outline The main PCB consists of the circuits which perform the following functions; • Receive the printing data from the computer. • Convert the received data to the bitmap data such as characters or graphics. • Control the engine and send the generated bitmap data as a video signal. The control panel is controlled by communicating with the engine CPU to display LCD messages, light the LEDs and display the button status, etc. The power for the Main PCB is supplied from the engine through the engine interface connector.
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CHAPTER
4
STRUCTURE
OF
SYSTEM
COMPONENTS
2.3
Main
PCB
(Video
Controller
PCB)
2.3.1
Outline
The
main
PCB
consists
of
the
circuits
which
perform
the
following
functions;
•
Receive
the
printing
data
from
the
computer.
•
Convert
the
received
data
to
the
bitmap
data
such
as
characters
or
graphics.
•
Control
the
engine
and
send
the
generated
bitmap
data
as
a
video
signal.
The
control
panel
is
controlled
by
communicating
with
the
engine
CPU
to
display
LCD
messages,
light
the
LEDs
and
display
the
button
status,
etc.
The
power
for
the
Main
PCB
is
supplied
from
the
engine
through
the
engine
interface
connector.