Brother International DCP-1400 Service Manual - Page 134

3.8

Sensor

Operational

Check

■

Function

This

function

allows

you

to

check

whether

the

eight

sensors

--document

front

sensor,

document

rear

sensor,

cover

sensor,

registration

sensor,

toner

sensor,

paper

ejection

sensor,

manual

insertion

sensor,

and

cassette

sensor

--operate

correctly.

■

Operating

Procedure

(1)

Press

the

3

and

2

keys

in

this

order

in

the

initial

stage

of

the

maintenance

mode.

The

machine

beeps

1100

Hz

and

400

Hz

tones

cyclically

through

the

following

volumes

for

testing

the

speaker.

OFF

L

1100

Hz

Low

—>

Medium

-f

High

400

Hz

High

<—

Medium

<—

Low

1

OFF

NOTE:

For

models

w/

fax:

To

stop

beeping,

press

the

Function/Menu

key.

For

models

w/o

fax:

To

stop

beeping,

press

the

Menu

key.

If

the

sensing

status

are

as

listed

below,

the

LCD

will

show

the

following:

"DFDRCVRSTNPOFHR2"

and

"MNCSC2"

(which

can

be

switched

by

pressing

the

Fax

Start

key

for

machines

w/

fax

or

the

Sort

key

for

machines

w/o

fax)

Given

below

is

the

relationship

between

the

LCD

indication,

sensor

names

and

sensor

status.

LCD

Sensors

Sensing

status

DF

Document

front

sensor

DR

Document

rear

sensor

CV

Cover

sensor

RS

Registration

sensor

TN

Toner

sensor

PO

Paper

ejection

sensor

FH

CCD

HP

sensor

R2

2nd

registration

sensor*

No

document

detected.

No

document

detected.

Front

cover

closed.

No

paper

detected.

No

toner

detected.

No

paper

jam.

CCD

placed

in

home

position

No

paper

detected.

MN

Manual

insertion

sensor

CS

Cassette

sensor

C2

2nd

cassette

sensor*

No

paper

detected.

No

paper

cassette

loaded.

No

paper

cassette

loaded.

(*These

error

indications

will

always

be

displayed

in

models

not

equipped

with

a

2nd

paper

cassette.)

(2)

Change

the

detecting

conditions

(e.g.,

insert

paper

through

the

document

sensors

or

the

registration

sensor(s),

open

the

front

cover,

remove

the

toner

cartridge,

jam

paper

at

the

paper

outlet,

insert

paper

manually

through

the

paper

slot,

and

load

the

paper

cassette(s)),

and

then

check

that

the

indication

on

the

LCD

changes

according

to

the

sensor

states.

To

stop

this

operation

and

return

the

machine

to

the

initial

stage

of

the

maintenance

mode,

press

the

Stop

key.

NOTE:

If

you

have

opened

and

closed

the

front

cover

during

the

above

procedure,

you

need

to

open

and

close

the

front

cover

again

upon

completion

of

the

procedure.

(

3

)

V

-

15

Brother International DCP-1400 Service Manual - Page 134

Sensor, Operational, Check

Page 134 highlights