Brother International MFC-7050C Service Manual - Page 125

Brother International MFC-7050C Manual

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Trouble (4) Light - J (5) Dark ,,, ,.,,, , .=, (6) Black or blurred vertical stripes ( I i ji l Action to be taken At the scanner Check the following components: - CIS unit - Main PCB At the printer Check the following components: - Ink cartridges - Main PCB - Power supply PCB - Interface PCB At the scanner Check the following components: - CIS unit - Main PCB At the printer • For each of the two ink-jet print heads embedded in the ink cartridges, perform the head nozzle cleaning operation several times to remove dust or air bubbles from its nozzles. (If the problem persists, replace the ink cartridge(s).) • Replace the main PCB, the interface PCB, and power supply PCB. At the scanner Check the following components: - CIS unit At the printer • Check whether paper is in abnormal contact with any other components during ejecting. II JI VI - 8

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Trouble
Action
to
be
taken
(4)
Light
At
the
scanner
Check
the
following
components:
-
CIS
unit
-
Main
PCB
At
the
printer
—
J
Check
the
following
components:
-
Ink
cartridges
-
Main
PCB
-
Power
supply
PCB
-
Interface
PCB
(5)
Dark
At
the
scanner
Check
the
following
components:
-
CIS
unit
-
Main
PCB
At
the
printer
,,,
,.,,,
,
.=,
•
For
each
of
the
two
ink
-jet
print
heads
embedded
in
the
ink
cartridges,
perform
the
head
nozzle
cleaning
operation
several
times
to
remove
dust
or
air
bubbles
from
its
nozzles.
(If
the
problem
persists,
replace
the
ink
cartridge(s).)
•
Replace
the
main
PCB,
the
interface
PCB,
and
power
supply
PCB.
(6)
Black
or
blurred
vertical
stripes
At
the
scanner
Check
the
following
components:
-
CIS
unit
At
the
printer
I
l
(
ji
i
•
Check
whether
paper
is
in
abnormal
contact
with
any
other
components
during
ejecting.
II
JI
VI
-
8