Brother International HL 760 Service Manual - Page 36

CHAPTER

IV

TROUBLESHOOTING

1.

INSPECTION

MODE

1.1

Incorporated

Inspection

Modes

The

printer

incorporates

the

inspection

modes

such

as

the

factory

inspection

mode

and

the

test

print

mode.

The

inspection mode

varies

with

the

model

of

the

printer.

Factory

inspection

mode,

Continuous

grid

pattern

print

mode,

3

patterns

print

mode

and

NV

-

RAM

value

dump

mode

etc.

The

operation

of

the

inspection mode

is

as

follows.

(1)

Turn

off

the

power

of

the

printer.

(2)

With

the

top

cover

open,

turn

on

the

power

while

holding

down

the

button

of

the

operation

panel.

When

entering

this

setting,

DRUM

LED

is

ON.

While

holding

down

the

button,

LEDs

go

ON

in

the

order

of

DRUM

->

ALARM

->

READY

->

DATA

->

DRUM.

If

you

release

the

button,

a

mode

is

selected.

The

mode

selected

is

indicated

by

the

LED

which

is

ON

when

you

release

the

button.

The

inspection

modes

are

assigned

to

the

respective

LEDs

as

shown

below.

LED

Type

of

inspection

DRUM

Factory

inspection

mode

ALARM

Continuous

grid

pattern

print

mode

READY

3

patterns

print

mode

(grid

horizontal

lines

and

black)

DATA

NV-

RAM

value

dump

mode

DRUM+ALARM

The

ROM

code

update

(only

when

flash

memory

is

mounted)

ALARM+READY

RAM

check

READY+DATA

4%

density

printing

Details

of

the

factory

inspection mode

are

as

follows.

This

mode

is

used

to

check

if

the

sensors

in

the

printer

function

correctly.

On

the

process

of

this

inspection,

LEDs

and

buttons are

also

checked.

On

entering

this

mode,

the

LEDs

show

the

status

of

respective

sensors

as

follows.

IV

-

1

Brother International HL 760 Service Manual - Page 36

Troubleshooting

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