Sharp MZ-80P5 Service Manual

SHARP

SERVICE

MANUAL

t_ - -

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------=:::::::---

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FEATURES

PDSM281

Dot Printer

MODEL .

MZ-80P5

11-HS

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•

Printing

•

Character

• Bit image

• Paging

Tabulation

•

Feed

•

Copies

• Alarm bell

• Bi-

•

Printing

paper

directional

ribbon

printing

Can use

Four

Printing

Number

Both vertical

Switch Control

Simultaneous

Alarm paper,

Along the

lt

is

character

etc.

with bi-

use

can used.

fanfold

is

possible

of

for

line by line

is

also possible

bell

sounds

of

logical seeking. (Only

be easily

paper

4-10

sizes are possible.

with

lines

printed

and

horizontal

paper

through

copies,

up

to

warn

directional

put

in

inches wide.

dot

units.

on

1 page can be

tabulation

feed

and

software.

io

3 pages in

the

user

printing, there

80

and

taken

determined.

control

paper

eluding

of

mechanical

characters/line,

out

feed

the

is

very

because

is

effective

a special

possible.

in page units.

original, are possible.

trouble,

lack

printing

40

characters/line)

cartridge

of

printing

thanks

to

ribbon

SHARP

CORPORATION

Contents

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Precautions before servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Explanation Troubleshooting Adjustment

1/0 card repair procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Power supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Functions Replacing Replacing Repair procedure Circuit diagram Disasse

Packing method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacement parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

of

MZ-80P5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CPU

board & drive

of

head

driving coil energizing pulse

of

printer parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

of

main printer

ink

ribbon

for

and

·mbled views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

parts.

from

cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

printer mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

printed wiring board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

PWB

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

width

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

41 44

71

SPECIFICATIONS

• General

Item

Printing method

Feed methos

Kinds

of

characters

Character make-up 8(H) x 9(W)

Line-to-line

No.

of

Page

Printing

space

digits

speed

Impact

Variable sprocket feed

230 kinds (95 ASCII characters +95 reverse characters ASCII character +40 other characters

size

1/6 gram

80 digits, digits or determined by software

66 lines/page (line or

80 (ordinary

Specification

dot

character)

inch or determined by pro-

40

determined by program .

cps

(characters per second)

size

matrix

of

the

dot

matrix

digits, 136 digits,

characters)

space

(normal

mode)

95

Item

Printing paper

Copies

Printing paper

thickness With in 0.3mm

Ink

ribbon

Head

life

Standard interface 8

68

Power supply

Power consumption 75W

Working temperature

Storage

temperatur~

Specifications

Fanfold paper

Max.

of

original)

Special cartridge ribbon

Approx. dot

character

bit

parallel interface (special Sharp personal computer MZ-808) AC

220V 240V

AC

5

to

35°C

-20

to

(4-10

inch wide)

3 copies (including

50

million

±1 ±1

50°C

printing)

0%

50Hz

0%

50Hz

characters (14

(for

for

UK)

Printing direction

•

CPU

Board Section

Item

CPU ROM Program

RAM

Si-direction for

normal

(80 characters/line) and its double

size

character printing (40 charac-

ters!l-ine). For

and other printing; u'ni-direction (left

to

Specifications

Z-80A.

Character TMM

314APL-1 (2114L-1)

1/0

Counter 8253AC

AC AC DC

DC DC

pes

Unit

220V 240V 26V

15V

5V

(21.5

Other IC's 22

• Power Supply

Item Specifications

Input

Output

(with

size

right).

TMM

2732 (4K Bytes)

TMM

2732

TMM

8255AC

±1

0%

50Hz

±1

0%

50Hz

to

26.5V)

logical seeking)

character

bit

image printing

(4K

Bytes)

(1K

(for

UK)

printing

Bytes)

External dimensions

Weight

• Driver

Item

Timer

Head driver

Step

Others

PWB

IC

TR

motor

T R 2$D986 X 8

NOTE Specifications

to provement. In such a tion the product.

Approx.

377(W) X

Approx.

6.4

Section

Specifications

NE555 2$D986 X 9

Diodes, transistors

and

change

without

here may

be a little

318(D) X 105(H)mm

kg

appearance

prior

notice

case,

different

are

subject

for

the explana-

from

im-

-1-

I PRECAUTIONS BEFORE SERVICING

•

The

printer damaged by vibration, taining

the

Fix

• Do

not operating. The

•

• Do

• When servicing

• There are

• There are screws

print

down

not

will damage

not

fuzz

to

page

proof replacing new parts. (Refer screws.)

mechanism

or

repairing

mechanism again with these screws when

apply

external force

head becomes very

sufficiently.

turn

the

paper feeding mechanism.

print

when

and

dust

from

two

types

39,

40

for

etc.

during

is

fixed

to

etc.

during

transport.

the

printer.

to

the

hot

paper

feeding

the

ink ribbon

checking a

th~

inside,

of

oil,

oi

I points.)

and

nuts which are fixed and

transport.

G2

knob

printer

and

Paint

to

page

is

oil

the

chassis with

print

so

do

(manual feed knob)

loose.

that

the

02.

the

screws

39,

two

screws

Remove these screws when using, main-

transporting

Remove

head, such

not

touch

has been used

mechanism. Use

the

proper

then

to

lock

40

for

the

it

points

the

fastening

as

by

with

your

when

for

a long time, remove dirt,

oil

for

locked with

them

to

keep

it

from being

printer.

screws

touching

the

each oil point. (Refer

after

be

it

when

hand

until

it

cools

power

is

on

or

paint

for

vibration-

disassembling and

painted

to

lock

it

you

the

is

-2-

MZ-80P5

NAMES OF

PARTS

AND

EXPLANATION OF . FUNCTI.ONS

• Names

of

parts

Power

switch

Control

panel

Appliance

Drive

PWB

inlet------'

unit---------.

Specification

Switch

panel

r-

PWB

-----

unit

L-------Signal

L...--------FG

---------

CPU

terminal

(Frame

board

(1/0

ground)

unit

POR1

term

inal

-3-

• Printer Control Flow

• Print Character Transfer

Flow

When

the the character code, the signal

printer to

a high level.

receives

it

raises

• Explanation

of

• Status Check

Signal

Flow

(Print

character

(Print

character transfer

transfer

routine)

RDA

............

RDP

............

STATUS

The printer outputs this signal under the

1)

When the power

2)

When the Outputs Data(RD1

from

,._,

the

. . . . . . . . . Responds in the

(Negative logic)

1)

PAPER EMPTY

2)

Printer machanical trouble

is

ON.

printer

is

READY.

controller

RD8)strobe

following

(1

BH + 03H)

following

to

the printer. (Positive logic)

conditions according

(1

BH +

04H)

-4-

conditions. (Negative logic)

to

STATUS

demands

from

the controller.

•

n

c

"

OJ

0

~

a.

C)

Circuit

Interface

;::'

OJ

0

n

RDP

RDA

STATUS

0

c.;·

ROB

RQ1,..._.

c.c

3

~

C)

and

Motor

Circuits

Drive

Head

Stopping

Indicator

Circuit

SW,

Buzzer

r_

,------->.

f---

and

Control

Terminal

Optionla

1\ 1\ 1\

I I Data

I I I

~

r--

PIO

8255AC

D

~>I

§

Chip

Circu1t

Select I

-1111

()

Bus

Control

f--

D Add,ess Bus

Latch

Circuit

>I

:2;,:e,

~

I >

~

~!l

!

B!us

Data

."1

V

Circuit

Memory

RAM)

(ROM,

BOA Z-

4MHz

·

Clock

~cuit

CPU

1

Reset

Circuit

r----

...._

IRT

I

0'1

• Driver

Board

Block Diagram

CPU board

* CR Step

>

motor=

Head circuit

Timer circuit

drive

I

Carriage

driving

*CR

motor

':::>

drive

FEED

'>

motor drive

step

motor = Timing

step

and

circuits

step and

circuits

belt

motor

Printer

.>

mechanism

'"""!\

!\

-6-

TROUBLESHOOTING CPU BOARD & DRIVE PWB

+

5V +15V +26V

(21.5

to

26.5V)

Check

power

circuit.

Check

printer

mechanism

FEED,

TOF

SW

Check

FEED

circuit

drive

circuit

Push

and

on again.

FEED

turn

SW

power

Check CR step circuit & printing

Check

printing

circuit & FEED

Check

printer

circuit

&

motor

drive

head drive circuit

head

drive

circuit

interface

1/0

card

*TOF:

Top

of

Form

-7-

FEED, DRIVE CIRCUIT

SW

FEED, TOF

CIRCUIT

for CPU board

for DRIVE

PWB

>-----

Connect

Check FEED,

...

and R 5, 6, 20, 19.

Check select

Check

switch

Check latch

023,

TOF

circuit

039,

PWB.

switches

(1)

022.

2SC

1815

2SB

743

S5277B

Check step

for

FEED.

YES

motor

-8-

Check connecting line & latch

circuit

Check

011,

Check

12, 13, 14.

IC2

2SD

7406

986

(for

DRIVE

PWB check)

':::>

Check

Check IC1 and circuit

Check

•I

circuit

Check circuit

TIMING

Check latch

020,

21

019

and adjacent 1

circuit

adj<;)cent

and adjacent I

555

25A

1015

25C1815

Check

printer

head

Check latch

Check

+26V

Check

circuit

power circuit.

01

to

8

0

8

1

to

010

to

17

RA

1

250986

51555

1 15953

-9-

2SC1815

2SB743

CIRCUIT CONNECTED WITH.

CR

STEP

MOTOR

DRIVE

Check latch circuit.

Check

+26V

power circuit.

for DRIVE

PWB

7406

2SD986

74LS14

8253

18

2SC1815 2SB743

S52778

2SD986 7406

2SC1815 74LS14

74LS04 74LS08

74LS10 74LS74

Check

025,

27,

041.

~------------------~

Check connecting line and latch

circuit

Check

015,

IC3

Check R17, C10.

16, 17,

IC4,

03

R10, 14, 15

IC15, 19,

5,

17,

for CPU

board

74LS125

Z-80A

Check

motor.

CR

step

-10

circuit

IC23

(1)

8253

Check select

Check

-

PRINTER

'

INTERFACE

CIRCUI"!J

(For

CPU

board check)

Connect

Check

CheckiC16

latch

cable.

IC1,

IC2

circuit.

3

74LS125

75189

I

7406

Check

IC11

Check

latch

circuit.

IC16

7406

-

11-

..._

(For

______

CPU

board

_,

check)

Check

chip

Check

select

IC

circuit.

26

Z-80A

CPU board check)

(For

Check IC13

Check IC12

11

C

I

Check

74LS02

74LS04

8255

Check

CS,

I

9,

10

Check IC11

Check reset

12-

-

circuit

8255

.

(For

CPW

board check)

Check I

C23

I

8253

Check

oscillator

Check

chip

select

Check

IC26

circuit.

2MHz

Z-80A

Check

EP-ROM,

circuits.

RAM

(For

CPU board check)

Check

oscillator

Check reset circuit.

Check

R30.

Check

each

BUS line

circuit.

-13-

CPU board Check)

(For

Check

IC26

IC16

IC27

IC26

IC24

IC17

Z-80A

7406

74LS32

Z-80A

74LS42

74LS08

CPU board Check)

(For

-14-

Check chip

Check reset

Check

select

circuit.

IC26

IC11

circuit

Z-80A

8255

(For

CPU

board

check)

Check

chip

Check

IC26

select

IC27

IC26

Z-80A

circuit.

74LS32

Z-80A

(IC22: ROM (IC25:

ROM

(For

CPU board Check)

1)

2)

Check

chip

Check

select

IC26

IC27

IC26

circuit.

Z-80A

74LS32

Z-

80A

-15-

(IC14

(IC18:

:

RAM

2)

1)

Check

IC26

Z-80A

ADJUSTMENT OF

This

concerns

the

energizing pulse contrary, wire clacking wire

is

This

adjustment

following

1) Remove

2) Take

head

3)

Turn insertion area.)

4) Draw

5)

Connect

24V

6) While pushing

units. (The

7)

Connect see if semi-variable resistor (The semi-variable resistor

Note: Before checking pulse

the

broken.

manner.

cabinet

out

cord

on

out

D.C.

the

printing energy force

width larger pulse out.

is

the

head

In

most

required

B.

(Do cord

width

PWB.

the

paper

end

the

power

supply

3 units

(current

the

pulse

of

D.C.

capacity:

the

line feed switch

head

is

shifted

synchroscope

width

on

at

HEAD

(time) is,

prolongs

cases,

the

to

give an

not

disconnect

PWB

connector

sensor.

socket

power

1.5A

right

to

the

synchroscope

the

drive

is

to

width,

DRIVING COIL ENERGIZING PULSE WIDTH

for

the

head

appropriate

(Put

(N0504) supply or

more), of

and

left.)

collector

PWB

be fixed

calibrate

head wire smaller the

printing

wire

the

connector

from

a piece

with

to

the

to

adjust

with

the

is

the

15V

set,

of is

lacquer synchroscope

to

print a dot

the

printing energy is,

time

of

caught

by

printing energy

of

feed switch circuit.)

the

connector

of

paper

in

5-pin lead

5-pin

connector

D.C.

and

turn

on

the

transistor

400±1 0

the

J.J.sec.

width.

after

and

thus

head wire,

the

ink

ribbon,

to

the

of

terminal

the

paper

from

the

CPU

(N0504)

SV D.C ..

power

switches

019

(2SC1815)

If

the

width

adjustment.)

to

eliminate

its length in

· weakening

thereby

and

time

feeding

what

printed

the

is

worse,

head wire. Make an

PWB.

Be

careful

sensor lever

located

board.

of

CPU

board

of

the

three

on

the

drive

is

out

of

standard

error

in

time

base.

as

well. The

letters.

head

adjustment

not

at

as

D.C.

PWB

value,

with

the

tip

to

damage

printing

shown

power

to

check

rotate

shorter

To

the

head

of

head

in

the

paper

below:

supply

to

the

Sy nch rose connected (Collector

ope

here of

to

019)

Head driving coil energizing pulse signal

For

pulse

width

adjustment

0

be

Drive

PWB

unit

0 0

CPU

0 0

Board Unit

©

Connecting diagram

for

power

-16-

supply

and

synchroscope

1/0

•

Procedural

CARD

steps

MZ-808 MZ-80P5

(

REPAIR PROCEDURE

START

Mechanical

trouble

Family

(

Empty

Check IC2,

3,

8,9

•

Checking method

1)

Press insulated part

•

if

it

is

•

if

there

J

check

of

paper

(

of

printer interface circuit

of

IC

abnormally

is

an

heated

unappropriate change

STATUS

information

YES

END

with finger

......................

)

to

check

................

Check IC1, 2

3, 4,

7,

8, 9

IC

.

between circuits faulty

.

Check IC1,

5, 7

Check IC1,

4, 6, 7, 8, 9

improper,

too

large load

soldering, improper printed

in

4,

IC,

touching

wiring

2)

Use

•

if if

Note)

a synchroscope

input

and

output

TTL-IC

voltages·

TTLievel:

to

check

logics

are

High:

Low:

of

within

TTL-IC

the

2.4Vormore

0.5V

TTL

or

do

level

less

not

match

-

17-

Defective

I

C gate

POWER

SUPPLY

SECTION

AC 2 AC24

(

•

20V

o--

ov

for

Block

UK)

Diagram

Filter section

of

Power

Power transformer

Supply Circuit

~

1--

~

....

Rectifier section

Smoothing section

-

--

Regulator section

Regulator

section

Regulator section

0

(21

<>

-

+26V

""26.5V)

.5

+5V

+15V

-18-

• Troubleshooting

':>

NO

Check

I

transformer

..,

circuit.

power

and

input

YES

NO

80103,

Check C103, C104.

CheckR101, ZD102,

Q101,

Check

connector

output

80102,

Check F104,C105

Check output connector

Q102.

02,

IC1

F1

03,

-19-

NO

80101,

Check

C106.

F105,

Check IC101 output connector

FUNCTIONS OF PRINTER

I

Parts

Exterior

•

Mechanism and Names

of

Paper sensor

PARTS

driving

Ribbon

Sensing Mechanisms

•

Sensing Home Position The carriage speed.

mechanisms

sensor

PTS

of

The

gear

consist

carriage

the

generates

sensor

PE

of

the

sensor, PTS sensor

HP

generates

and

signal

timing

detects

the

head

Print

Timing

and

reference signal

the

determine

to

used

presence or absence

motor

belt

PE sensor.

for

printing position.

paper.

of

The

printing.

Sprocket

sensor

HP

lt

unit

attached

is

detects

Paper feeding

determine

to

signal

this

motor

and

the

adjusts

1.

Sensor (Home Position

HP

HP sensor consists

The

High

is

signal

The

output)

when

of

the

Sensor)

home

the

sensor

position

board

sensor

interrupts

-20-

assembly

light

the

sensor board

and

of

shaft

the

photo

the

on

coupler

lower

.lt

.

part

an

is

of

open

carriage.

the

collector

2. PTS The The

Sensor PTS

sensor

signal

(Print

is

Timing Signal Sensor)

consists

Low

when

of

the

slit

PTS

of

the

sensor

board assembly

board

appears.

and

(lt

is

the

an

sensor open

board

collector

on

the

output.)

timing

belt

motor

shaft.

3. Paper

4.

The

paper

to

the

no

paper.

Sensor

sensor consists

paper

sensor

Circuit

lever.

~

• Printing Mechanism

The main platen.

carriage guide. pulley.

Printing coil.

The

performs

The

elements

print

The

current

of

head

timing

when

flows

of

the

reed

switch

The

permanent

the

printing mechanism are

unit

on

the

carriage

belt

is

driven by

the

dot

wire springs

when

the

PTS signal

attached

magnet

To+5V

HP signal

PTS

ToGND

is

moved

the

timing

out

toward

is

generated by

to

paper

approaches

signal

print

head

to

the

right

belt

the

sensor

board

and

the

permanent

the

reed switch

Paper sensor

and

the

signal passes

Reed

switch

o------o~

~Permanent

unit,

carriage, timing belt, timing

and

left

by

the

motor

platen

belt

through

due

motor

the

to

the

rotation.

timing belt

belt

flow

on

driving pulley

of

c1,.1rrent

magnet

when

magnet

belt

attached

there

motor

shafts A and B of

and

belt

driving

in

the

head driving

is

and

the

Carriage

HP signal

PTS

H

ea

Dot

1. Principle The carriage

the

carriage.

signal

dd.f-

wire

of

drive

nve

coi I signal

tip

Carriage

is

moved

signal

~--------------2~.5~4~m-m~(-1/-10_"_)--------------~$f

~--------------------~$

~

C 0.4ms

---=-----

--~~-

Movement

to

the

right

and

left

by

the

drive

of

the

timing

belt

motor

with

the

timing

belt

inserted in

Carriage

Junction

Right

Timing

-21-

belt

for

Drive

Sequence

the

of

timing

belt

the

belt

motor

drive

basically

is

move

to

2-2 phase

carriage

the

excitation.

follows.

as

is

Printing function

2.

explanation

This

function

The

1) toward

forced

The

2) when

function

The

3) longer

dot

The

striking

From

the

strikes

it

passes

wire,

force

Carriage

left

right

the Print

of

for

is

plate

platen

wire springs

dot

the

plate

through

after

and

right

to

the

pulled

is

since

platen.

is

the

it

wire

the

left

Head

wire

is

it

reset

driving

strikes

return

Step

1 2

3

4

1

2

3

4

movement

the

to

in

connected

it

till

out

former

its

to

coil.

platen,

the

spring

one

of

core

with

strikes

position

returnes

and

phase

A

ON

OFF

ON

OFF

dot

current

when

function

the

platen

the

to

maintains

when

the

by

its

B phase

OFF

ON ON

ON

OFF

ON

character

one

in

flows

plate.

dot

one

and

of

force

position,

a

in

itself

is

driving

the

printed

is

the

which waiting

C phase

OFF

ON

OFF

ON

OFF

ON

formed.

coil and

on

function

connected

is

condition.

the

plate

thus

paper

spring

with

D phase

ON

OFF

ON

OFF

ON

OFF

dot

the

through

when

function

wire springs

ribbon

the

current

plate,

no

by its

Function

plate

Function

Dot

plate

wire

spring

-22-

Ribbon

mask

Platen

•

Paper

The transmission

up

with

the The because

Feeding Mechanism

paper

the

carriage

printing

of

feeding

from

the

gear

driven by

sprocket

right

position

resolution

mechanism

pins.

to

left.

on

the

precision

the

The

paper

has

ordinary

paper

feeding

drive

method

can

be

of

the

..::.....::-------Paper

feed,

adjusted

pulse

fast

motor

for

motor

the

feed.

Paper

and

the

sprocket

paper

feeding

with a knob,

.

is

fed

by

driving gear. Paper

motor

is

but

the

adjustable

the

sprocket

same

as

minimum

shaft

is

the

fed

using

by pulling

carriage

width

is

about

the

sprocket

the

motor

paper

rnoves

0.5mm

• Ribbon Feeding Mechanism

The

ribbon chanism the

following

L__

is

1

2.

__

attached

mechanism

to

arrangement

Carriage

Left (In

direction

Right

direction

(In

consists

the

of

--*

Right

--*

Left

belt

wheels.

movement

of

the

tension

arrow-+)

arrow

cartridge

plate

The

~)

assembly.

ribbon

and

Movement

driving gear

• Belt Planetary

• Belt driven Planetary

Ribbon

Sprocket

ribbon

normally

Arrangement

driven

pinion

driving gear

drive gear

Sprocket

feeding

of

the

turns

pulley

(3)--*

transmission gear

Paper feeding

mechanism.

timing

belt

to

counterclockwise.

of

wheels

--*

Planetary

(2)

--*

Ribbon

--*

Planetary

motor

The

ribbon

the

right

pinion

( 1)

driving gear

pinion

(1) (4)--*

and

--*

feeding

left

is

through

me-

The

ink

ribbon

and

ribbon

Furthermore,

loose as

it

is

stored

endlessly in

pressure roller,

there

is

is a ribbon

wound. A ribbon

wound

braking

mask

the

UJ3

by

spring

is

attached

cartridge

the

ribbon

at

the

to

case. This

feeding

outlet

of

prevent

the

-23-

ink

knob

the

paper

ribbon,

set

on

cartridge

from

pinched

the

ribbon

case

to.

becoming

between

driving gear.

prevent

dirty.

the

ribbon

feeding

from

knob

becoming

Ribbon

feeding

knob

pressure

Ribbon

planetary

Ribbon

planetary

Ribbon

Connector Diagram

•

Connection solenoid

Print

11

solenoid

Print Common

Ribbon

11

line(+)

11

roller

gear (

gear (2)

driving

1)

gear

planetary

2

3

4

5

6

7

8

9 9

Ribbon

gear (4) gear (3)

Connector

2

3

4

10

11

terminal

5

6

7

8

planetary

No.

Connector

Ribbon

terminal

No.

15

~16

17

0

L18

19

20

21

22

23

24

25

braking

Connection

T sensor

R,

Paper

Timing

Reset

motor

CR

motor

PF

spring

sensor

signal

"

..

(GND)

A phase

"

B

"

c

"

D

A phase

(+5V)

VLED

common

motor

CR

+)

line(

PF

motor

common

line

Note: Print solenoids are

12

13

14

counted

1,

2

.....

from

9

-24-

the

upper

side

of

26

27

28

characters.

the

B "

"

c "

"

D"

"

REPLACING OF MAIN PRINTER

I

1. Sprocket Unit

Disassembly

. 1-1

(1) Remove

Remove

(2} (3) Remove

Pull

1)

Lift

2)

fastener

sprocket

the

sprocket

the

sprocket

the

sprocket

for

bearing

unit

shaft

unit

guide shaft. (4N x 2,4W x 2)

the

of

the

arrow

frame LA side

from

disassemble.

and

the

in

and

up

direction

out.

sprocket

and

PARTS

(E ring)

shaft.

remove

the

sprocket

bearing

from

RA

Frame

94V F 303003000

frame

-+

RA.

Sprocket

94VF303013010

Sprocket

94VF303010010

guide

Sprocket

94VF30301301

shaft

0

-25-

Sharp MZ-80P5 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual