Brother International DCP1000 Service Manual - Page 108
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5.3.8 Sensor Operational Check • Function This function allows you to check whether the eight sensors--document front sensor, document rear sensor, scanner open sensor, registration sensor, paper ejection sensor, toner sensor, CCD HP sensor, and document tray open sensor--operate correctly. • Operating Procedure (1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode. The equipment beeps 1100 Hz and 400 Hz tones cyclically through the following volumes for testing the speaker. LOFF 1100 Hz Low -> Medium -÷ High 1 OFF 400 Hz High
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5.3.8
Sensor
Operational
Check
•
Function
This
function
allows
you
to
check
whether
the
eight
sensors
--document
front
sensor,
document
rear
sensor,
scanner
open
sensor,
registration
sensor,
paper
ejection
sensor,
toner
sensor,
CCD
HP
sensor,
and
document
tray
open
sensor
--operate
correctly.
•
Operating
Procedure
(1)
Press
the
3
and
2
keys
in
this
order
in
the
initial
stage
of
the
maintenance
mode.
The
equipment
beeps
1100
Hz
and
400
Hz
tones cyclically
through
the
following
volumes
for
testing
the
speaker.
OFF
L
1100
Hz
Low
—>
Medium
-÷
High
400
Hz
High
<—
Medium
<—
Low
1
OFF
4—I
NOTE:
To
stop
beeping,
press
the
Menu
key.
If
the
sensing
status
are
as
listed
below,
the
LCD
will
show
the
following:
"DFDRCVRGPOTNFHFC
Given below
is
the
relationship
between
the
LCD
indication,
sensor
names
and
sensor
status.
LCD
Sensors
Sensing
status
DF
DR
CV
RG
PO
TN
FH
FC
Document
front
sensor
Document
rear
sensor
Scanner
open
sensor
Registration
sensor
Paper
ejection
sensor
Toner
sensor
CCD
HP
sensor
Document
tray
open
sensor
No
document
detected.
No
document
detected.
Scanner
unit
closed.
No
paper
detected.
No
paper
jam.
Toner
detected.
CCD
unit
placed
in
the
home
position
Document
tray
closed.
(2)
Change
the
detecting
conditions
(e.g.,
insert
paper
through
the
document
sensors
or
the
registration
sensor,
open
the
scanner
unit,
jam
paper
at
the
paper
outlet,
remove
the
toner
cartridge,
move
the
CCD
unit
out
of
the
home
position,
open
the
document
tray),
and
then
check
that
the
indication
on
the
LCD
changes
according
to
the
sensor
states.
(3)
To
stop
this
operation
and
return
the
equipment
to
the
initial
stage
of
the
maintenance
mode,
press
the
Stop
key.
5-14