Sharp MZ-80P6 Service Manual

0

SHARP

SERVICE

Dot Printer

MODEL

MZ-80P6

I>f\CIG

2">.1.8~

oo

,

(_o

~

''

MA.

KU

'

MANUAL

PDSM881

009-MZ

Printing paper

•

Character printing

•

Bit image printing

•

Paging

•

Tabulation

•

Feed

•

Copies

•

• Alarm bell

Bi-directional printing

•

Printing ribbon

•

inch

10

to

4

character

Four

possible

vertical

for

bell sounds

with

use

mode)

be

can

is

nes

li

of

and

line

also possible

is

bi-directional

logical seeking.

of

easily

Printing

Number

Both

,Switch

Control

Simultaneous

Alarm paper, etc.

Along the space

lt

because a special

FEATURES

fanfold

width

possible.

are

sizes

dot

with

printed

by

copies,

on

horizontal

paper feed and paper feed

line

through

up

warn the user

to

in

put cartridge

paper

units.

page

1

tabulation

software.

pages

3

to

printing,

(Except

and taken

ribbon

8.3

.and

be

can

control

including

mechanical

of

there

for

out used.

is

8.5 inch

to

determined.

possible.

is

in

original,

the

very effective

is

image

bit

without

getting ones hands

width

page

trouble,

printing

units.

are

lack

or

possible.

sheet paper.

printing

of

thanks to

line

non

for

dirty

SHARP

CORPORAT

ION

·

------

----

Contents-

- -

--

-----

Specifications Precautions Explanation

before servicing .

MZ-80P6

of

Troubleshooting

head

supply

of of ink

of

section

printer

main

ribbon

Adjustment

Power Functions Replacing

Replacing

Repair procedure

diagram and

Circuit

Packing

Disassembled

method

views .

Replacement parts

CPU

driving

printer

for

printed

0 0 0 0 0

ist

I

0 0 0 0 0 0 0 •

board

. .

...

parts

cartridge

from printer

••••••••

0 0 0 0 0 • 0

.....

.

....

0 0 0 0 0 0 0 0 •

..

energizing

coil

0 0 0 0 0 •

0 • 0 0 • 0 0 0 • 0 0 0 0

...

•••••

0 0

mechanism

board

wiring

0 0 0 0 0 0

•

••••

••

0 0 • 0 0

••

pulse

0 0 0 0 0 0 0 0 •

••••••••

•••••••••

0 • • •

0 0 0 0 •

•••

0 0 0 • 0

••

•••

•••••••

width

•••

0 0 0

0

0 0 •

• 0 • 0 0 0 0 0 0

0 0 0 0 0 • • • • • • • • • • • • • • • • • • • • • • • • •

••

1

2

3

7

15 16

17

22 36

39

54

60 61

65

SPECIFICATIONS

• General

Item

Printing

Feed

Kinds

Character make-

Line-to-line

No.

Page

Printing

method

of

digits

speed

characters

space

Specification

Serial

impact

dot

matrix

Variable sprocket feed tion

feed

selectable manually

230 kinds

I

8(H) x 9(W)

up

I

size

character)

1/6 inch or determined by pro-

gram

80 digits, digits or determined by program

66 lines/page (line or determined by program

80

cps (characters per second)

(ordinary

dot

matrix

40

digits, 136 digits,

size

characters)

space

or

fric-

(normal

mode)

Item

Printing

Copies

Printing paper

Ink

Head

Interface

68

Power

Working temperature! 5

Storage temperaturf;)

paper

thickness

ribbon

life

supply

consumption 75W

Fanfold Cut wide}

Max. original)

Within

Special

Approx. dot

character

8

bit

AC

220V

AC

240V

to

I

-20

Specifications

paper

paper sheet

of

3 copies

0.3mm

cartridge

50

million

printing)

parallel

35

to

±1

±

°C

50°C

interface

0%

10%.

(4-1

0

inch wide}.

(8.3-8

(including

ribbon

characters ( 14

50Hz

.5 inch

Printing direction

• CPU

CPU

ROM

1/0

IC Other IC's Head drive

TR Step

TR

---

Board

Item

counter

motor

-

Bi

-

direction of direction and non line character printing.

Section

Specifications

8085A 8039P-6 (Step

2732

2716 8155

17

2SD986

(Data process

*

(8085A

CG-ROM}

(8039P-6

X

8

X

8

character

for

motor

control

for

I

ine

printing.

bit

image

space

1/

0)

control)

and

ROM}

space

mode

Uni-

printing

of

External -dimensions

Weight

• Power Supply

Item

Input

Output

* ROM

2732

(I

C16}

ordered separately

different

MZ-808 MZ-80K

MZ-80A

(Under development)

Host

by the

comput

I

App!fOX.

377(W}x

(including

Approx.

352(D)

an

assistant guide)

7.2

kg

x

1

05(H)mm

Unit

Specifications

AC

220V

±1

0% 50Hz

AC

240V

±1

0%

50Hz

DC

26V

(21.5

to

26.5V}

DC15V DC

because the programs being stored

computer

Types

.er

.

5V

is

not

standard and needs

to

be

of

ROM

Applicable model

MZ

-8BP5R

MZ-8KP5R

(Under development}

MZ

-

8AP5R

(Under development)

connected.

of

to

ROM

be

are

Note: Specifications and appearance

the explanation here may

be

a

are

little

subject

different

to

change

from

-1-

without

the

product.

prior

notice

for

improvement.

In

such a

case,

I

PRECAUTIONS

•

The

printer

damaged taining

Fix

•

Do operating.

•

The

down

• Do

•

When servicing fuzz

•

There to

•

There

proof replacing

screws.)

•

To do

or

the

mechanism

not

apply

print

sufficiently.

not

print

and

dust

are

page

63,

are

etc.

hold

the

not

hold

by

repairing

head

two

64

screws

during

new

the

BEFORE

mechanism

vibration,

:

external

becomes

when

and

from

types

for

parts.

printer

paper

is

etc.

the

printer.

again

0

111111111

H

111111

111'

Remove the fastening screws

the

ink

checking

th~

inside,

of

oil,

oil

points.)

and

nuts

transport.

(Refer

mechanism

sensing device

fixed

during

with

these

Il

l 0 °

0

11111111111

°

0

force

very

ribbon

a

and

G2

which

Paint

to

the

transport.

to

the

hot

so

is

loose.

printer

oil

and

are

page

only,

SERVICING

chassis

with

four

screws

print

do

that

the

02.

fixed

the

screws

63,

hold

and

the

Remove

when

head,

not

touch

has

been

mechanism. Use

the

and

to

64

for

at

the

paper

these

transporting

such

as

it

with

used

proper

oil

then

locked

lock

them

the

pointsto

points

illustrated

guide

section.

by

for

screws

the

touching

your

a

long

for

each

with

after

be

to

keep

when

printer.

hand

time,

oil

point.

paint

for

disassembling

painted

below.

it

from

being

using, main-

it

when

until

it

cools

remove

(Refer

vibration-

to

lock

Especially

it

dirt,

and

the

is

-2-

EXPLANATION

• Construction

Model MZ-80P6

and power supply,

consists

as

illustrated below.

Control

Logic

(8085)

Logic

(8039)

of

a

switches

1

2

locig

OF

1,

logic

MZ-80P6

2,

print

head driver,

Print

head

driver

Motor

driver

motor

driver,

printing

~--------·

I

I I

I

'

I

mechanism,

Printing

Print

Timing

Paper

I

L._

________

mechanism

head

belt

feeding

Sensor

control

motor

switches,

I

....J

• Explanation

1.

Block

diagram

The

printer

print

head

ROM's

are processor The

8155 256 bytes to

the parallel interface,

rates

1/0

and

control

Interface (Option

of

Logics

employs

control,

2732

and 2716. The

8085,

and the

is

a

RAM

of

which

ports and

bus

from

terminals)

STATUS

and Drivers

two

microprocessors,

and the

RAM

latter

for

stepping

former

latter

processing programs

with

1/0

ports and

136

bytes

are

used

print

head drive

(128 bytes), and connected

the 8085,

Print drive

through

head circuit

8085

and

8039.

motor

control

stores processing programs and condensed characters

for

counter/timer

for

storing data and the rest

circuit,

the

control

1/0

ports. The

The

and

8039. and

used

bus

to

the stepping

RAM

former

control

in

for

the

8039,

is

used

is

primarily

switch

conjunction

a

work

area. The

and display

motor

drive

as

a

work

Motor

CPU,

RAM

used

input

process. Employed

with

the 8085. Its

1/0

circuit. circuit, area.

drive

8039

,

1/0

PORT

for

data process and

for

ports

are

The

8039

external

Sensor

sensor

circuit

external

the

micro-

capacity

connected

incorpo-

circuit,

is

-3-

IRT

~

Power

supply

I

2. Reset circuit

switching

At

(1)

circuit

The

of

use

(10KS1)

IC13

resets

8039.

momentary

At

(2)

+5V

If

Whereby,

circuits

drive

the

When

drive

the power

forms

charging

a

and

8085,

power

all

power

circuits

supply.

power

of

on

reset

a

time

capacitor

a

IC12

interruption supply

circtJits

the

from

supply

from

supply

signal

a

of

C9

8155,

and

reduced

is

are

voltage

turned

is

faulty

making

by

resistor

(47pF)

and

turning

below

reset

drop

off,

operation

17

R

and

IC21

off

approx.

momentary

at

the

of

a reset

+5V

due

ISI~§

RIG

IOOlt

~~ilv,......_+-~

......

CLAMP'

~

C5

IOOOP

I

power

of

4V,

power

line.

is

signal

the

to

+5V

4

Rl7

f

IOK

,.+

il~C9

,..,47)l/16V

supply

clamping

the

supply

generated

residual

IC5

LSI4

13

ll

voltage

IC5

LS14

3

12

Z2

Leading edge power

is

circuit

interruption

same

the

at

determined

RESET

+5V

supply

actuated

protect

to

of

time

by

/

---:~"

-

/

of

1

~i=::::::!..._

signal

Reset

form

to

the

interruption

constant

time

the

____

a reset

programs

protect

to

signal.

and

the

of

_

+15V

8155

3.

136

the

Data

mulator those above

responding

of

one When shortest

printing

The

from

+5V

Reset

(256 bytes RAM, with

RAM in

the

of

bytes

working

a

for

rest

)

RD

to

(RD

listed

mentioned

8155.

the

piece

character

8155

the

1

of

printing

employed.

is

has

8039.

the

in

to

data.

the

With

also

8

8085

character

RAM character

the

printing

made.

is

a

To

8085

signal

the

area.

the

from

where

code

up

image

data

function

STATUS

8039

DOT

ONLINE

POWER

FROM8039

8085

+5V-v-

~~-.-.-=-.-.-.-.~CL~.-.-.-~r-.-.-.-~

I

H:5msec/div

1V/div

Pin V:

@

V:1V/div

®

waveform

ports and timer)

1/0

are

8155

parallel

identified

is

it

or

table,

line.

one

to

from

data

data,

print

input

are

image

the

In

timer

the

of

-

RDA

p24

TIMING

LED LED

2MHz

RST7.5

power

at

for

used

interface

whether

image

When

character

the

they

and

printing

and

PC PC1 PC

PC3 PC4

PCs

TIMER

H:20msec/div

switching

supply

character

the

input

is

the

data.

print

line

one

generator

stored

not

are

printed,

being

and

timing

the

o

2

IN

OUT

8155

from

data

If

data

condensed

the

of

on

code

1/0

the

character

is

data

the

accumulated,

are

(2732)

the

in

available

an

dot

half

PAo

~

PA7

o

PB

\

PB7

Reset

storage

ports

are

and

RAM

mode,

is

-

RD

RDs

PIN1

PINS

8085

signal

area

(PA data,

character

outputs

but

space

formed

l

)

s

of

to

one

PA

at

7

waveform

0

control

data,

8085

the

pattern

the output

are

judged

is

mono-directional

the

receiving

by

power

line

and

)

code,

they

reads

to

and

supply

character

stored

code

are

dot

the

to

PBo

bi-directional

the

signal (2MHz)

clock

switching

codes

the

in

other

stored

patterns

PBo

in

PB1

quick

and

accu-

than

the

in

cor-

PB1

to

every

return

off

-4-

bytes

4.

8039

The

1 A and

PM

motor PM2B, from Signals

(8039

P2

7

Square

(CPU with

to

and

8085,

the

for

wave

128

primarily

used

is

Bare

1

PM

select normal characters

HOLD3

data

READY).

of

control

input

communication

2KHz

5. Print head drive circuit

dot

pattern

dot

If

Dot

head. head drive modulated increased at

and

timing

pulse

a

with

voltage), and

low

pulse

400J,lsec

of

power

-

r

and

RAM

controlling

for

driving

a

pulse

the paper feeding

DB

to

8

D

to

0

between

signaling the buzzer

for

I

At

A

8155PC2

FROM

SW

FEED

SW

T.O.F

EADY P

8039R

triggers

pulse are

the

timing

(at a power supply voltage

supply

- -

voltage

energy supplied

the

Print

ports)

1/0

the

of

characters/line)

(80

.

7

8085

o

~

s

output

through

555

of

drive pulse

head

the stepping

belt

timing

motor.

8039

and

output

is

o

DB

7

DB

t

22

P

20

P

P24 P

25

26

P

27

I

from

circuit

a

(the pulse-duration

26V

the

to

generator-

Z07

0525.6

~

signals

LD2

HO

by

P

from

current duration

power

- -

control

decoding

(from

4

2

flows

pulse

generated

are

output

PM1A PM1B

PM2A

PM2B

HOLD1 HOLD2

HOLD3 BUZZER

electric

short

print

control

head drive

outputs

and

functions

input

.

P

1 7

Pto P11 P12 Pt3

4

P1

Pts

6

Pt

lt

HO LD1 and

and

to

motor.

motor,

condensed characters ( 136 characters/line).

or

These

are

from

p17

IC8155,

port

/0

generating

for

. The

24V)

of

reduced at high

is

whereby constant.

is

head

print

,----

26

R

0/2W

68

R25

151<

201<

26v

PIN I

3

from

the

1 0

timing

1 7

belt

P

to

P

PM2A,

PC

the

)

2

print print

data

and

control

8155

through

produce

to

pulse-duration

is

supply voltage and

-

sv

"""2"

-

016

2SD986

f

•

I

CCN2)

I

I I

I

Br:5..5P<3

~

IN

M

I

T

DOT

I

PULSE

L _ _

lll

Waveform

__

V : 1 V

(at

Circuit

_

--

JMf

ii

r

500J.,Lsec

H:

/div

printing)

test

forming

--

at

----

/d

iv

555

T062504P

pulse

®

IC

3

of

-- -

I

____

l

short

----_

RES

C21

OUJ

0

I

_

duration

r-

V : 1 V /

Waveform

-,

4

Cl9

IOQOP

I

1

5

7

8

3.3)(

xSl

31<

3.

(RA2

I

I_.

-----

circuit----

drive

head

Print

-

--

-

--

L

r-

.\

1

\.

~

f'-

_J

-

I I

I

:500J.,Lsec/div

test

(at

printing)

V : 1

OV

I

/div

H

~

r--

div

test

at

500J.,Lsec

H:

point

-

__

:___

_

(at

div

/

test

--

printing)

CN2G)to@terminals

'--

-5-

6. Timing

When

o~f

to when line.

In

pulse

to

If

both flows the step-out

belt

HOLD1

pass

+26V

HOLD1

both

PM1A HOLD

through

motor

drive

signal

current

signal

modes, the

and

PM1

1 and

the stepping

of

the stepping

circuit

is

low

is

high and

print

B.

HOLD2

and

through

head

signals

motor

HOLD2

signal high, the

the stepping

HOLD2

is

driven

are through due

to

motor.

signal

is

from

turned

the

R2

vibration

018

In

this

low,

current

left

to

right,

high,

both

( 120f2/5W).

etc.

while

2SB743

018

the stepping

case,

of

or

The

is

the mode

+15V

vice

versa

and

intention

019

turned

on and the

is

SO-characters/line.

flows and the mode

by

transmitting

are

turned

of

motor

off

the

holding

is

standing still.

019

2SB743

is

136-characters/

motor

and a

holding

current

is

turned

Contrarily,

drive sequence

current

is

to

prevent

7. Paper feeding

When

HOLD3

In

this situation, paper

signal

is

high, a

~

.\

I I

"

I I

...

-

V:10V/div

CN2

@

to

@

r--------

motor

signal turns

holding

~

.\ \

r-.,

...

~

H:5msec/div

terminals

---

drive

current

\.:,

(At

circuit

low,

is

fed

r\

-

test

printing)

- - --

CN2@

the

by

transmitting

is

passed

:6~

017

through

-

\J.

1\

--

V:10V/div

to

@terminals

is

turned

motor

:5

:-

N

\

r-

-

H:2msec/div

(At

test

on

to

pass

drive sequence pulse

the R 1 (

120f2/5W).

r------

I

I I

1

I

I I

I

-

-l

\

a

printing)

current

of

+26V

through

to

PM2A

and PM2B. When

---------------

+

15V

the stepping

motor.

HO

LD3

HOLD 2

-~

I

I I

I

:

HOLD

I

3

---'=Q

I

ICIB

LS04

Paper

1>"'---<..._-/~5~+--+---+---28

circuit

D8

5!12778

ICI

LSO!S

feeding

motor

drive

-6-

I

24---11---+--+---.<~1---+---'~

I

_L

__________________

Timing

belt

motor

P.:...-.!::.OC

drive

circuit

_ _

T·

ROUBLESHOOTING

NO

CPU

BOARD

Go

to

SUPPLY

"CHECK

CIRCUIT".

OF

POWER

NO

Go

c Go

Go

to

"CHECK

to

"CHECK

to

"CHECK

to

"CHECK

OF

Go

BELT

LED

SW

CIRCUIT".

LINE

FEED

TOP OF

PRINT

TIMING

to

"CHECK

MOTOR

CIRCUIT".

CIRCUIT"

FORM

HEAD

DRIVE

BELT

OF

CIRCUIT".

.

CIRCUIT"

MOTOR

TIMING

.

. )

CIRCUIT".

NO

Go

-7-

Go

Ch e

to

"CHECK

ck

OK

"PAPER

interfac

FEEDING

OF

PRINTER

e cards.

MOTOR

INTERFACE

DRIVE

CIRCUIT"

CIRCUIT".

.

CHECK MOTOR

OF

TIMING

CIRCUIT

BELT

NO

Check

Check circuits.

Check

8039

circuit.

IC2, IC6,

018

and

8039

circuit.

and

020

.

surrounding

74LS05

TD62003P

2S8743

S5277B

Refer

to

waveform

(Page

6).

Check

belt

timing

motor

YES

.

NO

-8-

Check

IC2

01

and

to

04.

IC18.

74LS05

74LS04

2SD986

CHECK CIRCUIT

OF

LED

CHECK

OF

SW

CIRCUIT

No

NO

Check

8085

Check

pattern.

Check IC6.

Check

LED

circuit.

TD62003P

SW

circuit.

Check

8085

Check

chip

circuit

.

Check IC9.

Check IC15.

circuit.

select

74LS32

74LS244

-9-

CHECK MOTOR

OF

PAPER

DRIVE

FEEDING

CIRCUIT

Check

LED Check R30, R33, and C25.

Check IC19.

Check

SW

TC40H004P

8039

circuit.

board.

CHECK CIRCUIT

Check Check

OF

TOP

LED

SW

R29

, R32, and C24.

OF

board.

FORM

Check IC1, IC6, and surrounding

Check

017

and D18.

8039

IC1

, and IC18.

05

to

circuits.

circuit.

08.

Check IC19.

74LS05

TD62003P

2SB743

S5277B

74LS05 74LS04

2SD986

Check paper feeding motor.

-10-

555

~

8085

Check

Check reset

timing

Check generator

IC19

Check surrounding

.

circuit

circuit.

pulse

circuit.

and

circuits.

.

555

Connect

Check

cable.

IC11.

IC10

8085

74LS244

.

75189

circuit

.

Check

print

YES

head.

Check

IC3

8085

09

and

to

021.

TD62504P 2SA1015

.

circuit

.

016

2SD986

-

11

~

CheckiC3.

8085

Check

IC3.

Check

TD62504P

circuit.

TD62504P

-

ASSOCIATION CIRCUIT

WITH

B039

Check

oscillator

circuit.

Correct "START"

Check

reset

and

IC21.

circuit.

back

step.

to

CHECK CIRCUIT

OF

8085

Check

oscillator

circuit.

Check reset

circuit.

Check

IC18

pattern

discontinued.

Check

IC20

Check IC21, pattern

touch.

or

.

or

8039

74l~:S04

2716

GJi'eck

Check

R44.

pattern.

pattern

each bus

.

line

.

8039

Correct "START"

and back

step.

and

back

step.

to

-12-

Check Check Check

of

of of

ROM 8155

IC15

(2732)

74LS244

CHECK

OF

ROM

Check select

Check

chip

circuit.

IC5.

R31.

74LS14

CHECK

OF

8155

pattern.

Check

IC5.

Check

Check bus lines.

74LS14

8155

IC14.

Check

74LS273

Check bus lines.

bus lines.

Check

2732

OK

YES

Check 1C12.

IC12.

Check

IC12.

Check

8155

-13-

CHECK 74LS244

OF

IC15

Check

circuit.

Check

eh

ip

pattern.

IC9.

select

CHIP

SELE<;:T

CIRCUIT

Check

Check bus

Check

IC8.

IC9.

74LS32

lines.

Check IC15.

74LS32

74LS244

74LS42

YES

OK

-

14-

ADJUSTMENT

This

concerns

the

energizing contrary, wire

clacking

wire

is

This

adjustment

following

1)

Remove

circuit.)

2)

Take head

3)

Turn insertion

4)

Draw

5)

Connect

24V

6)

While units.

7)

Connect

(2SA

width

(The

Note:

the

pulse

the

larger

out.

broken.

manner.

upper

out

the

cord

PWB.

on

the

area.)

out

the

3

units

D.

C.

(current

pushing

(The

head

the

1

015)

on

i~

out

semi-variable

Before

checking

printing

is

cabinet.

head

paper

power

synchroscope

of

OF

width

pulse

In

most

required

cord

end

supply

of

D.C.

capacity:

the

line

is

shifted

the

CPU PWB

standard

resistor

pulse

energy

(time)

width

cases,

to

(Do

PWB

sensor.

power

feed

right

value,

is

width,

HEAD

force

is,

the

prolongs

the

head

give

an

not

disconnect

connecto

(Put

socket

supply

1.5A

or

switch

and

to

the

to

check

rotate

to

be

fixed

calibrate

DRIVING COIL ENERGIZING PULSE WIDTH

for

the

head

wire

to

print

a

dot

and

its

length

in

time

as

well.

The

smaller

the

appropriate

(CN4)

more),

of left.) test

the

printing

wire

is

the

r

from

a

piece

with

to

the

14V

the

set

point

to

see if

the

semi-variable

with

lacquer

the

synchroscope

printing

time

caught

printing

connector

the

connector

of

paper

5-pin

5-

D.C.

turn

which

the

of

by

energy

lead

connector

and

on

the

is

pulse

resistor

after

in

energy

the

5V

connected

adjustment.)

head

ink

of

on/off

of

the

from

D.C.

power

width

to

eliminate

is,

wire,

ribbon,

to

the

terminal

paper

the

(CN4)

switches

on

(VR1)

thus

weakening

thereby

and

head

line,

top

PWB.

sensor

CPU

board.

of

to

the

synchroscope

at

the

error

feeding

what

wire.

Make an

of

form

Be

lever

CPU

of

the

collector

CPU PWB

in

time

printed

the

is

worse,

and

careful

located

board

three

of

is

base.

letters.

head

with

the

adjustment

line

not

to

at

printing

as

shown

D.C

.

power

the

transistor

400

±1 0 11sec.lf

to

adjust

the

tip

feed

damage

the

shorter

To

the

head

of

head

in

the

switch

the

paper

below:

supply

021

the

width.

~400±1

---8

G-

---8

--8

G-

---8

c::=:::J

--E.)

c::=:::J

---8

c::=:::J

-E)

c::=:::J

-E)c=:J

G-

~

6

-E)

c=:J

--E)

--E.)

--f)

-E)

--E)

CJ

[:=::::J

r=:J

c:=J

c::::::J

G-

0

J1Sec

~

Head

driving

u

-B

~

coil

24V

~

[)

~

=§

0

cb

p

energizing

(Current

capacity:

IC3

I

·~

©

ICS

I

0

pulse

1.

n

p

signal

5A

For

IC8

IC9

or

more)

pulse

width

'm

adjustment

Connecting

diagram

for

power

-15-

supply

and

synchroscope

POWER SUPPL V SECTION

•

Block Diagram of Power

Supply

Circuit

ACI

NPUT

o-

•

Filter section

Troubleshooting

-=-

Power

transformer

-

f--

~

Rectifier

section

Rectifier section

Smoothing section

NO

-

Regulator section

Regulator

section

Check transformer circuit.

------<>

power

and

{)

(21.

0

input

+26V

5

""26.5V)

+5V

+15V

YES

NO

YES

NO

Check

80103,

C1

03,

C1

CheckR101, Z01

02,

0102.

Check0101, output

connector

Check

80102,

F104,

C105

Check

IC1 output connector

Check

80101,

F1

05,

C106.

Check

IC101 output connector

04.

02,

F1

03,

-16-

FUNCTIONS

•

Exterior

of

Mechanism

Release lever

OF

and

_PRINTER

Names

of

Parts

~

PARTS

•

Sensing

Sensing Home The carriage

Adjusting

Mechanisms

mechanisms

Position

PTS

sensor

speed.

lever

of

the

generates

The

PE

consist

carriage

sensor

the

of

HP

and

timing

detects

sensor,

generates

signal

the

Timing

PTS

the

reference

used

presence

belt

sensor

to

determine

or

absence

motor

and

PE

signal

sensor.

for

printing

of

paper.

The

printing

HP

.

position.

sensor

lt

Sprocket

is

attached

detects

Paper

this

unit

feeding

to

determine

signal

motor

and

the

adjusts

1.

HP

Sensor (Home

The

HP

The

signal

output)

sensor

is

Position Sensor)

consists

High

when

of

the

sensor

home

position

board

sensor

interrupts

-17-

assembly

the

light

anq shaft

sensor

of

the

board

photo

on

the

coupler.

lower

(lt

part is

an

of

open

the

carriage.

collector

2.

PTS Sensor

The The

PTS

signal

(Print Timing

sensor

consists

is

Low

when

of

the

Signal

the

slit

Sensor)

PTS

of

the

sensor

board

assembly

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

paper

Circuit

sensor

consists

lever.

• Printing Mechanism

The

main

elements platen. carriage guide. pulley. Printing coil.

The

performs

The

print

current

The

flows

of

head

timing

when

of

the unit

the

when

the

The

pnntmg

on

the

belt

dot

the

reed

switch

permanent

mechanism

carriage

is

driven

wire

springs

PTS

signal

attached

magnet

is

moved

by

the

out

is

generated

approaches

To

+5V

HP

signal

PTS signal

To

GND

are

print to

timing

toward

to

the

paper

head

belt

the

by

sensor

board

and

the

reed

switch

and

Paper sensor

o----o~

~Permanent

unit,

right

motor

platen

the

and

belt

carriage,

left

through

due

motor

by

the

to

the

rotation.

t1m1ng belt,

timing

belt

flow

permanent

the.

signal passes

Reed

belt

driving

of

current

switch

timing

on

shafts

pulley

magnet

when

magnet

belt

A

and

in

the

attached

there

motor

and

B

belt

head

is

and

of

the

driven

driving

Carriage

HP signal

PTS signal

Head

Dot

1. Principle

The

carriage

the

carriage.

drive

signal

I......____--..Jr-

-

drive

coi

I signal

wire

tip

of

Carriage Movement

is

moved

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

to

Left

-----'

the

=fl--

right

1

--------2-.5-4_m_m_(-1/_1_o·-·

·2.08ms

0.4ms

and

left

by

the

drive

of

Carriage

Right

the

timing

Junction

)

---------(~

belt

motor

with

the

Timing

belt

timing

motor

$\---

belt

f-

inserted

in

Timing

-18-

belt

Drive

for

the

timing

belt

motor

is

basically 2-2

phase

excitation.

Sequence

2.

of

Printing function

This

explanation

function

1) The toward

2)

The

forced

when

it

3) The

function

longer

dot

The

striking

the

belt

motor

Carriage

From

left

to

From

right

to

of

the Print

is

for

the wire

plate

is

the platen since

dot

wire springs

strikes the platen.

plate

is

passes

through the

wire, after

force and the

it

drive

to

move the carriage

Step A

1

right

2

3

4

1

left

2

3

4

Head

movement

pulled in

it

reset

strikes the platen, returns

wire

to

is

connected

out

to

its

driving

return

of

one

the core when

with

the

till

it

strikes the platen and one

former

coil.

spring and maintains itself in a

position

is

as

follows.

phase ON

ON OFF OFF

ON

OFF OFF

dot

when one character

current

function

to

by

the force

its

flows

plate.

position,

B

OFF OFF

ON

OFF OFF

phase

ON

ON ON

in

the

dot

of

which waiting

driving

is

printed

the

C

OFF

OFF OFF

is

formed.

function

is

connected

condition.

phase

ON ON

ON

coil

and thus the

on the paper

plate spring when

with

function

D

phase

ON

OFF

ON

OFF

ON ON

OFF

dot

through

wire springs

the

ribbon

current

plate, by its

no

Function

plate

Wire

return

Function

Dot wire

spring

plate

spring

-19-

Ribbon

mask Platen

Nose

tip

..

R

'

ib~)

\

Paper

Sharp MZ-80P6 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual