Brother International HL 1850 Service Manual - Page 226

CHAPTER

6

TROUBLESHOOTING

(

3

)

If

you

cannot

make

any

of

the

connections

in

step

(2),

check

the

fol

lowing:

a)

Make

sure

the

printer

is

turned

on

and

on-l

ine.

b)

Verify

that

the

cabl

ing

and

network

connection

are

good.

If

possible,

try

the

print

server

on

a

different

connection

on

the

network.

Also,

print

out

a

Configuration

page

to

see

if

you

can

see

any

Network

Statistics

information.

c)

Check

to

see

if

there

is

any

LED

activity.

The

print

server

has

three

LEDs.

These

can

be

used

to

diagnose

problems.

•

L-

LED

(green):

Link

activity

This

LED

is

on

if

there

is

a

val

id

connection

to

the

network

(either

10BaseT

or

100BaseTX).

It

is

off

if

no

network

is

detected.

•

F

-LED

(orange):

Fast

Ethernet

This

LED

wi

ll

be

on

if

the

print

server

is

connected

to

a

100BaseTX

Fast

Ethernet

network.

It

is

off

if

the

print

server

is

connected

to

a

10BaseT

network.

•

A

-LED

(green):

Transmission

Activity

This

LED

wi

ll

bl

ink

synchronized

to

the

transmission

or

receive

status.

(4)

If

you

are

using

a

repeater

or

hub,

make

sure

that

SQE

(heartbeat)

is

turned

off

at

the

hub.

Also,

if

you

have

a

hub

or

multi

-port

repeater,

verify

that

the

hub

or

repeater

port

is

good

by

trying

the

print

server

on

a

different

port.

(5)

If

you

have

a

bridge

or

router

located

between

the

print

server

and

host

computer,

make

sure

that

the

device

is

set

up

to

al

low

the

print

server

to

send

and

receive

data

from

the

host.

For

example,

a

bridge

can

be

set

up

to

only

al

low

certain

types

of

Ethernet

addresses

to

pass

through

(a

process

known

as

fi

ltering);

therefore,

such

a

bridge

must

be

configured

to

al

low

Brother

print

server

addresses.

Likewise,

a

router

can

be

set

up

to

pass

only

certain

protocols,

so

be

sure

that

the

desired

protocol

can

be

passed

through

to

the

print

server.

(6)

If

the

job

exits

the

queue

but

does

not

print,

make

sure

that

you

are

not

trying

to

print

a

text

job

to

a

PostScript

printer.

If

you

have

a

printer

that

is

capable

of

automatic

language

switching,

make

sure

that

the

printer

is

not

forced

into

PostScript

mode.

8.2

Intermittent

Problem

If

the

print

server

and

printer

start

up

OK,

but

you

intermittently

have

problems

printing,

check

the

fol

lowing:

(1)

If

you

can

print

smal

l

jobs

but

large

graphics

jobs

are

distorted

or

incomplete,

make

sure

that

you

have

adequate

memory

in

your

printer

and

the

latest

printer

driver

instal

led

on

your

computer.

The

latest

Brother

printer

drivers

can

be

downloaded

from

www.brother.com.

(2)

Check

the

individual

protocol

troubleshooting

sections

in

this

chapter

for

additional

causes

of

intermittent

printer

problems.

6-60

Brother International HL 1850 Service Manual - Page 226

Intermittent, Problem

Page 226 highlights