2500_Users_Manual- - 第239页

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. Rem…

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

2308-1

INPUT ORBITAL

ASSEMBLY

SPRING (1 of 2)

CENTER POST

Repair

and

Replacement

Procedures

Mechanical

Assembly

Removal

Replacing

the

Input

Orbital

Tube

Clamp

Figure

7-13

Remove

the

Track

Springs

If

the

tube

clamp

on

the

input

orbital

tube

clamp

assembly

is

too

loose,

does

not

close,

or

produces

too

much

tension,

follow

the

steps

below

to

replace

it.

1.

Turn

off

the

2500

and

remove

the

power

cord.

2.

Remove

the

PE

assembly,

as

described

on

page

7-3.

3.

Lift

the

main

plate

and

locate

the

round

input

orbital

motor

collar

on

the

cam

spindle.

Loosen

the

set

screw

and

remove

the

motor

collar.

4.

Remove

the

two

3/32-inch

hex

screws

that

hold

the

rear

orbital

alignment

block

to

the

underside

of

the

main

plate.

Slide

the

rear

orbital

retaining

block

off

the

dowel

pin

and

let

the

block

dangle

from

the

cables.

5.

From

above

the

main

plate,

remove

the

two

3/32-inch

hex

screws

that

hold

the

front

orbital

alignment

block

to

the

main

plate.

Remove

the

front

orbital

retaining

block

from

the

underside

of

the

main

plate.

6.

Support

the

left

side

of

the

orbital

assembly

while

you

remove

the

7/64-inch

hex

retaining

screw

on

the

right

side

of

the

orbital

assembly.

7.

Remove

the

3/32-inch

hex

screw

that

holds

the

grounding

strap

to

the

underside

of

the

main

plate.

8.

Use

a

needle-nose

pliers

to

remove

the

track

springs.

9.

Remove

the

four

3/32-inch

hex

screws

on

the

underside

of

the

input

orbital

plate.

10.

Cut

the

tie

wraps

and

disconnect

the

two

optic

cable

connectors

and

the

single

microswitch

cable

connector.

7-16

ProMaster

2500

User

Manual