Brother International DCP-1400 Service Manual - Page 142

defective.

Page 142 highlights

Messages on the LCD (In the 1st row) TONER EMPTY (In the 2nd row) Open cover, then replace new toner cartridge TONER LOW Probable Cause The toner sensor has detected that there is no toner in the cartridge or that no toner cartridge is loaded. If this message appears, recording is no longer possible. The toner sensor has detected that there is not enough toner. *On machines equipped with a single-row LCD, these messages appear alternately. If only an alarm beep is heard without any message on the LCD when the machine is powered up, the ROM or RAM will be defective. VI - 4

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Messages
on
the
LCD
Probable
Cause
(In
the
1st
row)
TONER
EMPTY
(In
the
2nd
row)
Open
cover,
then
replace
new
toner
cartridge
The
toner
sensor
has
detected
that
there
is
no
toner
in
the
cartridge
or
that
no
toner
cartridge
is
loaded.
If
this
message
appears,
recording
is
no
longer
possible.
TONER
LOW
The
toner
sensor
has
detected
that
there
is
not
enough
toner.
*On
machines
equipped
with
a
single
-row
LCD,
these
messages
appear
alternately.
If
only
an
alarm
beep
is
heard
without
any
message
on
the
LCD
when
the
machine
is
powered
up,
the
ROM
or
RAM
will
be
defective.
VI
-
4