Sharp MZ-80P5 Bedienungsanleitung

SHARP

SERVICE

MANUAL

PDSM281

007-MZ

t_ - -

----

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

•

Printing

paper

•

Character

printing

• Bit image

printing

• Paging

•

Tabulation

•

Feed

•

Copies

• Alarm bell

--.

Dot Printer

MODEL .

MZ-80P5

(~AeL~

11-HS

M.()D~L

l'H-t:

AQ'"f'f([

~~~·-HS

2.A1"LH~

....

P i

I c 2

(

w~Ut

M.A.Y

~-.toT

f:.

1ltf

~Mb

tG,

\\..1

'1l+t

U,..TE.~

?en

rrf~~

~~}~:)

i"-1.

f'~l)...l'Te

':;..)

----------

------

FEATURES

Can use

fanfold

paper

4-10

inches wide.

Four

character

sizes are possible.

Printing

possible

with

dot

units.

Number

lines

printed

1 page can be

determined.

Both vertical

and

horizontal

tabulation

control

possible.

Switch

for

line by line

paper

feed

and

paper

feed

in page units.

Control

also possible

through

software.

Simultaneous

copies,

3 pages in

eluding

the

original, are possible.

Alarm

bell

sounds

warn

the

user

mechanical

trouble,

lack

printing

paper,

etc.

•

directional

printing

Along

with

directional

printing

there

very

effective

printing

thanks

the

use

logical seeking. (Only

characters/line,

characters/line)

•

Printing

ribbon

can

be easily

put

and

taken

out

because

a special

cartridge

ribbon

used.

SHARP

CORPORATION

Contents

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

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

Explanation

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

Troubleshooting

CPU

board & drive

PWB

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

Adjustment

head

driving coil energizing pulse

width

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

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

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

Functions

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

Replacing

main printer

parts.

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

Replacing

ink

ribbon

from

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

Repair procedure

for

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

Circuit diagram

and

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

Disasse

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

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

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

SPECIFICATIONS

• General

Item

Specification

Printing method Impact

dot

matrix

Feed methos Variable sprocket feed

Kinds

characters 230 kinds (95 ASCII characters

+95 reverse characters

the

ASCII character +40 other

characters

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

dot

matrix

(normal

size

character)

Line-to-line

space

1/6

inch or determined by pro-

gram

No.

digits 80 digits,

digits, 136 digits,

digits or determined by software

Page

66 lines/page (line

space

mode)

determined by program .

Printing

speed

cps

(characters per second)

(ordinary

size

characters)

Printing direction Si-direction

(with

logical seeking)

for

normal

size

character

printing

(80 characters/line) and its double

size

character printing (40 charac-

ters!l-ine). For

bit

image printing

and other printing; u'ni-direction

(left

right).

•

CPU

Board Section

Item Specifications

CPU

Z-80A.

ROM Program

TMM

2732 (4K Bytes)

Character

TMM

2732

(4K

Bytes)

RAM

TMM

314APL-1 (2114L-1)

(1K

Bytes)

1/0

TMM

8255AC

Counter 8253AC

Other IC's 22

pes

• Power Supply

Unit

Item Specifications

Input

220V

±1

50Hz

240V

±1

50Hz

(for

UK)

Output

26V

(21.5

26.5V)

15V

Item

Specifications

Printing paper Fanfold paper

(4-10

inch wide)

Copies Max.

3 copies (including

original)

Printing paper

thickness Within 0.3mm

Ink

ribbon Special cartridge ribbon

Head

life

Approx.

million

characters (14

dot

character

printing)

Standard interface 8

bit

parallel interface (special

for

Sharp personal computer

MZ-808)

Power supply

220V

±1

50Hz

240V

±1

50Hz

(for

UK)

Power consumption 75W

Working temperature 5

35°C

Storage

temperatur~

-20

50°C

External dimensions

Approx.

377(W) X

318(D)

105(H)mm

Weight

Approx.

6.4

• Driver

PWB

Section

Item

Specifications

Timer

NE555

Head driver

2$D986 X 9

Step

motor

T R 2$D986 X 8

Others Diodes, transistors

NOTE Specifications

and

appearance

are

subject

change

without

prior

notice

for

im-

provement. In such a

case,

the explana-

tion

here may

little

different

from

the product.

-1-

IPRECAUTIONS BEFORE SERVICING

•

The

printer

mechanism

fixed

the

chassis with

two

screws

keep

from being

damaged by vibration,

etc.

during

transport.

Remove these screws when using, main-

taining

repairing

the

printer.

Fix

the

mechanism again with these screws when

transporting

the

printer.

Remove

the

fastening

screws

• Do

not

apply

external force

the

head, such

touching

when

operating.

•

The

head becomes very

hot

not

touch

with

your

hand

until

cools

down

sufficiently.

• Do

not

turn

the

paper

feeding

knob

(manual feed knob)

when

the

power

you

will damage

the

paper feeding mechanism.

• Do

not

when

the

ink ribbon

loose.

• When servicing

and

checking a

printer

that

has been used

for

a long time, remove dirt,

fuzz

and

dust

from

th~

inside,

and

oil

the

mechanism.

• There are

two

types

oil,

and

02.

Use

the

proper

oil

for

each oil point. (Refer

page

39,

for

I points.)

• There are screws

and

nuts which are fixed and

then

locked with

paint

for

vibration-

proof

etc.

during

transport.

Paint

the

screws

lock

them

after

disassembling and

replacing new parts. (Refer

page

39,

for

the

points

painted

lock

the

screws.)

-2-

MZ-80P5

NAMES OF

PARTS

AND

EXPLANATION OF.FUNCTI.ONS

• Names

parts

Control

panel

Power

switch

Appliance

inlet-

----'

Specification

panel

L-------Signal

terminal

(1/0

POR1

L...---

----FG

(Frame

ground)

term

inal

Drive

PWB

unit

--------.

-----

---------

CPU

board

unit

Switch

PWB

unit

-3-

• Printer Control Flow

• Print Character Transfer

Flow

• Status Check

Flow

• Explanation

Signal

When

the

printer

receives

the character code,

raises

the signal

a high level.

(Print

character

transfer

routine)

(Print

character transfer

routine)

RDA

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

The printer outputs this signal under the

following

conditions. (Negative logic)

When the power

ON.

When the

printer

READY.

RDP

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

Outputs

from

the

controller

the printer. (Positive logic)

Data(RD1

,._,

RD8)strobe

STATUS

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

following

conditions according

STATUS

demands

from

the controller.

(Negative logic)

PAPER EMPTY

BH + 03H)

Printer machanical trouble

BH +

04H)

-4-

Clock

4MHz

I I

~cuit

Z-

BOA

0'1

I I

r----

Reset CPU

Circuit

IRT

...._

Optionla

Terminal

1\ 1\ 1\ § I I Data

Chip

Select I

~>I

8255AC

Circu1t

r--

PIO

()

-1111

f--

Control

Bus

D Add,ess Bus

Data

B!us

~!l

:2;,:e,

Memory

Circuit

(ROM,

RAM)

I >

Interface

Circuit

STATUS

RDA

RDP

RQ1,..._.

ROB

I I I

Latch

Circuit

,------->.

Head

Drive

and

Stopping

Motor

Circuit

f---

Control

SW,

Indicator

and

Buzzer

Circuit

Circuits

•

;::'

c.;·

c.c

• Driver

Board

Block Diagram

Head

drive

Printer

circuit

mechanism

CPU

board

'"""!\

Timer

circuit

*CR

step

motor

and

':::>

drive

circuits

FEED

step

motor

and

drive

circuits

* CR Step

motor=

Carriage

driving

step

motor

Timing

belt

motor

-6-

TROUBLESHOOTING CPU BOARD & DRIVE PWB

Push

FEED

and

turn

power

on again.

*TOF:

Top

Form

+15V

+26V

(21.5

26.5V)

Check

power

circuit.

Check

printer

mechanism

FEED,

TOF

circuit

Check

FEED

drive

circuit

Check CR step

motor

drive

circuit

printing

head

circuit

Check

printing

head

drive

circuit

FEED

circuit

-7-

Check

printer

interface

circuit

1/0

card

for

CPU board

for

DRIVE

PWB

FEED, DRIVE CIRCUIT

FEED, TOF

CIRCUIT

YES

Check step

motor

for

FEED.

Connect

switch

PWB.

Check FEED,

TOF

switches

>-----

...

and R 5, 6, 20, 19.

Check select

circuit

(1)

Check latch

circuit

Check

023,

039,

022.

Check connecting line &

latch

circuit

Check

011,

12, 13,

Check

IC2

-8-

2SC

1815

2SB

743

S5277B

2SD

986

7406

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