Brother International MFC-7050C Service Manual - Page 101

Printout, Scanning, Compensation

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3.2 Printout of Scanning Compensation Data ■ Function The equipment prints out the white and black level data for scanning compensation. ■ Operating Procedure Do not start this function merely after powering on the equipment but start it after carrying out a sequence of scanning operation. Unless the equipment has carried out any scanning operation, this function cannot print out correct scanning compensation data. This is because at the start of scanning operation, the equipment initializes white and black level data and takes in the scanning compensation reference data. (1) Press the 0 and 5 keys in this order in the initial stage of the maintenance mode. The "WHITE LEVEL 1" will appear on the LCD. Then "PRINTING" will appear. (2) The equipment prints out the scanning compensation data list containing the following: a) 2-value quantization white level data (1728 bytes) b) 2-value quantization black level data (1 byte) c) LED light intensity value, 2-value quantization LED light intensity value (1 byte) d) 2-value quantization ND-high value (1 byte) e) Compensation data for background color (1 byte) (3) Upon completion of recording of the compensation data list, the equipment returns to the initial stage of the maintenance mode. NOTE: When the equipment prints monochrome images after monochrome scanning, only the green data is valid. NOTE: If any data is abnormal, its code will be printed with asterisk on the left side, as shown on the next page. In the first and last row, however, you can ignore the asterisks since they show the data for beyond left and right margins. V - 5

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3.2
Printout
of
Scanning
Compensation
Data
■
Function
The
equipment
prints
out
the
white
and
black
level
data
for
scanning
compensation.
■
Operating
Procedure
Do
not
start
this
function
merely
after
powering
on
the
equipment
but
start
it
after
carrying
out
a
sequence
of
scanning
operation.
Unless
the
equipment
has
carried
out
any
scanning
operation,
this
function
cannot
print
out
correct
scanning
compensation
data.
This
is
because
at
the
start
of
scanning
operation,
the
equipment
initializes
white
and
black
level
data
and
takes
in
the
scanning
compensation
reference
data.
(1)
Press
the
0
and
5
keys
in
this
order
in
the
initial
stage
of
the
maintenance
mode.
The
"WHITE
LEVEL
1"
will
appear
on
the
LCD.
Then
"PRINTING"
will
appear.
(2)
The
equipment
prints
out
the
scanning
compensation
data
list
containing
the
following:
a)
2
-value
quantization
white
level
data
(1728
bytes)
b)
2
-value
quantization
black
level
data
(1
byte)
c)
LED
light
intensity
value,
2
-value
quantization
LED
light
intensity
value
(1
byte)
d)
2
-value
quantization
ND
-high
value
(1
byte)
e)
Compensation
data
for
background
color
(1
byte)
Upon
completion
of
recording
of
the
compensation
data
list,
the
equipment
returns
to
the
initial
stage
of
the
maintenance
mode.
NOTE:
When
the
equipment
prints
monochrome
images
after
monochrome
scanning,
only
the
green
data
is
valid.
NOTE:
If
any
data
is
abnormal,
its
code
will
be
printed
with
asterisk
on
the
left
side,
as
shown
on
the
next
page.
In
the
first
and
last
row,
however,
you
can
ignore
the
asterisks
since
they
show
the
data
for
beyond
left
and
right
margins.
(
3
)
V
-
5