2500_Users_Manual-.pdf - 第238页

2390-1 PRINT HEAD SCREW (1 of 2) MOUNTING BLOCK (1 of 2) Repair and Replacement Procedures Figure 7-12 Removing the Print Head Replacing the Thermal Print Head The thermal print head is mounted on a small printed circuit…

2310-1

PRINT DRIVE

MOTOR

SCREW (1 of 4)

Repair

and

Replacement

Procedures

Replacing

the

Print

Drive

Motor

Follow

the

steps

below

to

replace

the

print

drive

motor.

1.

Turn

off

the

2500

and

remove

the

power

cord.

2.

Unplug

the

motor

cable

from

the

motor

power

supply.

3.

Push

down

on

the

belt

tension

wheel

and

remove

the

drive

belt.

4.

Loosen

the

5/64-labeler

knob

set

screw

(two

screws

are

used

on

the

thermal

printer)

and

pull

the

knob

off

the

motor

shaft.

5.

Remove

the

four

3/32-inch

hex

screws

that

hold

the

motor

to

the

labeler

plate

and

remove

the

motor.

See

Figure

7-11.

6.

Install

the

new

motor

and

reinstall

all

the

components

you

removed.

Figure

7-11

Removing

the

Print

Drive

Motor

(Dot

Matrix

Printer

shown;

Thermal

Printer

similar)

Replacing

the

Dot

Matrix

Print

Head

Follow

the

steps

below

to

replace

the

print

head.

If

you

need

to

adjust

the

gap

between

the

platen

and

the

print

head,

refer

to

the

“Adjusting

the

Print

Head

Gap”

procedure

on

page

5-24.

The

impact

print

head

is

mounted

on

a

small

printed

circuit

board

(PCB).

Do

not

attempt

to

remove

the

print

head

from

the

PCB.

The

new

print

head

is

mounted

on

a

new

board,

which

should

be

installed

as

one

assembly.

1.

Turn

off

the

2500

and

remove

the

power

cord.

2.

Use

a

3/32-inch

hex

wrench

to

remove

the

two

hex

screws

that

hold

the

print

head

to

the

print

head

mounting

blocks.

3.

Remove

the

two

cables

(J-22

and

J-23)

from

the

cable

connectors

on

the

print

head

PCB.

ProMaster

2500

User

Manual

Note:

Identify

and

mark

the

polarity

of

the

cables

before

you

remove

them.

4.

Install

the

new

print

head

assembly.

7-13

2390-1

PRINT HEAD

SCREW (1 of 2)

MOUNTING

BLOCK (1 of 2)

Repair

and

Replacement

Procedures

Figure

7-12

Removing

the

Print

Head

Replacing

the

Thermal

Print

Head

The

thermal

print

head

is

mounted

on

a

small

printed

circuit

board

(PCB).

Do

not

attempt

to

remove

the

print

head

from

the

PCB.

The

new

print

head

is

mounted

on

a

new

board,

which

should

be

installed

as

one

assembly.

1.

Turn

off

the

2500

and

remove

the

power

cord.

2.

Use

a

3/32-inch

hex

wrench

to

remove

the

hex

screw

that

holds

the

print

head

to

the

print

head

mounting

block.

Note:

In

the

older

style

thermal

printer,

there

are

two

print

head

mounting

screws

and

limited

clearance

for

a

full-size

hex

wrench

to

reach

the

inside

print

head

mounting

screw.

Use

an

L-shaped

3/32-inch

hex

wrench

that

has

been

modified

by

grinding

down

the

extension

end

so

让

is

between

1/4

-inch

and

5/1

6-inch

long.

Use

a

7/64-inch

hex

wrench

to

remove

the

hex

screw

that

holds

the

ribbon

cable

clamp.

3.

Pull

out

the

print

head

assembly

and

unplug

the

ribbon

cable

(J-27)

from

the

print

head

PCB

cable

connector.

4.

Install

the

new

print

head

assembly.

7-14

ProMaster

2500

User

Manual

Repair

and

Replacement

Procedures

Replacing

the

Beam

Head

Rotation

Motor

Follow

the

steps

below

to

replace

the

beam

head

rotation

motor.

1.

Turn

off

the

2500,

remove

the

power

cord,

and

disconnect

the

motor

cable.

2.

Remove

the

two

3/32-inch

set

screws

in

the

shaft

pulley

of

the

rotation

motor.

3.

Remove

the

single

3/32-inch

hex

mounting

screw

in

the

beam

head

pulley.

4.

Loosen

the

four

motor

mounting

screws

using

a

1/16-inch

hex

wrench.

5.

Pull

up

the

beam

head

pulley

and

remove

the

beam

rotation

belt.

6.

Remove

the

motor

drive

pulley.

7.

Use

a

1/16-inch

hex

wrench

to

remove

the

four

motor

mounting

screws

and

remove

the

beam

head

rotation

motor.

8.

Install

the

new

motor,

but

do

not

tighten

the

four

hex

mounting

screws.

9.

Install

the

motor

shaft

pulley,

beam

head

pulley,

and

beam

rotation

belt.

10.

Adjust

the

belt

tension

by

moving

the

motor

closer

or

farther

from

the

beam

head.

11.

When

you

have

sufficient

belt

tension,

tighten

the

four

hex

mounting

screws.

Replacing

the

Beam

Traverse

Motor

Follow

the

steps

below

to

replace

the

beam

traverse

motor.

1.

Turn

off

the

2500

and

remove

the

power

cord.

2.

Lift

the

main

plate

of

the

2500

and

disconnect

the

ribbon

cable

connector

from

J-7

on

the

controller

board.

3.

Disconnect

the

traverse

motor

power

cable

from

J-ll.

4.

Look

through

the

two

holes

in

the

top

of

the

beam

traverse

motor's

mounting

block

(see

Figure

7-16)

while

you

manually

rotate

the

lead

screw

until

the

heads

of

the

flex

coupler

set

screws

are

visible

through

the

holes.

5.

Use

a

7/64-inch

hex

wrench

to

loosen

the

set

screw

on

the

right

side

of

the

flex

coupler.

Note:

This

set

screw

connects

the

flex

coupler

to

the

beam

traverse

motor

shaft.

6.

Use

a

5/32-inch

hex

wrench

to

remove

the

four

beam

traverse

motor

mounting

screws

and

remove

the

beam

traverse

motor.

7.

Install

the

new

motor

and

re-assemble

all

of

the

disconnected

components.

ProMaster

2500

User

Manual

7-15