Brother International DCP1000 Service Manual - Page 130

6.2

TROUBLESHOOTING

6.2.1

Introduction

This

section

gives

the

service

personnel

some

of

the

troubleshooting

procedures

to

be

followed

if

an

error

or

malfunction

occurs

with

the

facsimile

equipment.

It

is

impossible

to

anticipate

all

of

the

possible

problems

which

may

occur

in

future

and

determine

the

troubleshooting

procedures,

so

this

section

covers

some

sample

problems.

However,

those

samples

will

help

service

personnel

pinpoint

and

repair

other defective

elements

if

he/she

analyzes

and

examines

them

well.

6.2.2

Precautions

Be

sure

to

observe

the

following

to

prevent

the

secondary

troubles

from

happening:

(1)

Always

unplug

the

AC

power

cord

from

the

outlet

when

removing

the

covers

and

PCBs,

adjusting

the

mechanisms,

or

conducting

continuity

testing

with

a

circuit

tester.

(2)

When

disconnecting

the

connectors,

do

not

pull

the

lead

wires

but

hold

the

connector

housings.

•

Before

handling

the

PCBs,

touch

a

metal

portion

of

the

machine

to

discharge

static

electricity

charged

in

your

body.

•

When

repairing

the

PCBs,

handle

them

with

extra

care.

After

repairing

the

defective

section,

be

sure

to

check

again

if

the

repaired

section

works

correctly.

Also

record

the

troubleshooting

procedure

so

that

it

would

be

of

use

for

future

trouble

occurrence.

(

3

)

6.2.3

Checking

prior

to

Troubleshooting

Prior

to

proceeding

to

the

troubleshooting

procedures

given

in

Subsection

6.2.4,

make

the

following

initial

checks:

Environmental

conditions

Check

that:

(1)

The

machine

is

placed

on

a

fl

at,

firm

surface.

(2)

The

machine

is

used

in

a

clean

environment

at

or

near

normal

room

temperature

(10°C

to

32.5°C)

with

normal

relative

humidity

(20

to

80%).

The

machine

is

not

subjected

to

rapid

change

of

the

ambient

temperature.

(Moving

the

machine

from

a

cold

place

to

warm

place

will

cause

condensation

inside

the

machine.

If

it

takes

place,

leave

the

machine

in

the

warm

place

for

approx.

two

hours

before

turning

on

the

power.)

Powering

on

the

machine

with

dew

condensation

will

result

in

damaged

electronic

devices.

(

3

)

(4)

The

machine

is

not

exposed

to

direct

sunlight

or

harmful

gases.

6-16

Brother International DCP1000 Service Manual - Page 130

Troubleshooting

Page 130 highlights