Sharp MZ-80B Manual de usuario

SHARP

SERVICE

.MANUAt""

.uu

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

~~~~~M~1

PDSM581008·MZ

•

()

[FEATURE~

Personal

Computer

MZ-80B

Options

MZ·80EU

MZ·80I02

(Expansion Port)

(Universal

I/O

Card)

MZ-80GMK (Expansion Graphic RAM)

MZ·80FI (Floppy Disk

I/O

Card)

Optional Peripherals I

MZ·80FBK

(Expansion

Floppy

Disk)

MZ·80FB (Floppy Disk)

•

The

MZ-80B. ste'pped

version of

the

MZ-80K,

a personal

computer

with

many

new

functions,

• Using a Z-80 processor (4MHz Version}

the

CPU,

capable

high

speed

data

processing.

•

has

a keyboard

touch

that's ideal

for

a professional

operator

and

equipped

with

a 10 numerical

keys

and

function

keys,

•

The

cassette-recorder,

using

electromagnetic

mechanism,

can

stopped/started

remotely.

Programs

and

data

can

recorded

automatically.

• With

the

optional

expansion

port,

1/0

card

Can

set

the

body

the

MZ-80B

for

peripherals

such as a

floopy

disk,

print~r,

etc.

SHARP

CORPORATION

~-.

r---------Contents---'-----------------....

MZ-BOB

Specifications. , , , , , , , , , . , , , , , , , , , , . , . _

.......

...

- - . .

System configuration

and

nomenclature

MZ-80B. , , , ,

..•.

....

, . - . .

Configuration

MZ-80B

_________________________

. . . . . . . . . .

...

Trouble shooting guide. _

..•

•.

.•

. _

••

: _

•.•

___ • • . . . . . . . . . . •

CPU board section

••..••..•.•••

•••••

•••••••

•••••.••.••..•.

Power supply section

......

••

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

, , , , . , ,

•••••

••

0.'

Monitor

section,

. , ,

...

', ,

,o.<:":-;"~".

~"':',

.-,

,",

';"~

-~'

.:::~:~~~::",,:,"~,

c~·

Cassette

tape

recorder

section.

, ,

.•...

:;-

, . , "

........

'-~".

...

, , "

Printed wiring board

and

circuit diagram

.•...•.

••••••••••••

•••••

Disassembled view

.....•.......•...............

, . ,

, , , , ,

.•.

Packing method

••..

•••••....••••..••.••.•.

••..••••.....•

OPTIONS

and

OPTIONAL

PERIPHERALS

Expansion

port

MZ-BOEU

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

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

Universal

I/O

card

MZ-80102

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

Expansion graphic RAM MZ-80GMK

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

Floppy disk

I/O

card

MZ-80Fl.

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

Floppy disk

MZ·80F8,

Expansion floppy disk

MZ·80FBK

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

Replacement

parts

list,

...

......

, - . ' ,

....

..........

Caution

in Service

Maintain

the

safety

[]nd

protecting

ability

the

apparatus

after

service,

High voltage shall

not

be rised

excess specified level

prevent

This

apparatus

from

the

extra

X·ray

radiation.

•

• MZ-80B General

CPU

LH0080A (Z 80A-CPU) Key

Layout

Keys

Clock 4MHz ASCII Standard,

Numerical keys,

Memory

ROM

2K bytes Function keys, Cursor control keys,

Cassette

tape

deck control keys

RAM

64K bytes (dynamic RAM) Clock

function

Built-in

Editor function Cursor control; up,

down,

right, left,

Display

CRT (green display)

home,

clear.

8 x 8

dot

matrix Edit key

1) Characters;

1000

Delete key

~-,--.-

--._--

----

(40

characters x

lines) Power supply

240V

(50Hz)

2) Characters;

2000

Temperature Operating temp;

0°

35°C

(80 characters x 25 lines) Storage temp; _15°

60°C

----

1), 2): software change-over Humidity

Lower

than 80%

Cassette Standard audio cassette tape Weight Approx_ 16kg

Data transfer speed;

1800

bits/sec. .

---

_.-

Dimensions Width

45cm

Data transfer system; SHARP

PWM

Depth 52cm

Manual or Automatic control Height 27cm

Sound output 400mW max. (440Hz) _

•

CPU

Board

Section

CPU

LH0080A(Z80A-CPU) 1 pc.

Programmable

.- .

counter

8253

1 pc.

PlO LH0081 A (Z80A-PIO) 1 pc.

. Programmable

ROM

IPL 1 pc.

12K

bytes) !

Character generator 1 pc,

(2K

bytes) peripheral

8255

pc_

1--. interface i

RAM

Standard; 16K

RAM

pcs_

---

(64K bytes) Other IC's

pcs. I

Video RAM; 1 pc. (2K bytes) I

• Power Supply Section • Graphic RAM

(I)

PWB

Section

------

Input

240V (50Hz)

~-----

Output

RAM

Static

RAM;

4 pes.

18K

bytes)

----

---t------------

._J

Other IC's 17 pes.

-5V

12V (stabilizing)

12V (non-stabilizing)

----

NOTE

Specifications

and

appearance

are

subject to

change

without

prior notice for improvement. In

such

a case, the

explanation

here may

a little

different

from the

product

-1-

-·

• Display Section

General

specifications

11.

Electrical specifications

Size

Video

output

40Vp-p

standard (35Vp-p

limit)

Vertical 60Hz (vertical),

lS.75kHz

(horizontal)

Resolution

Horizontal

*The

pattern

the

left

Horizontal •

the

center

the

picture

Frequency

must

be clear. •

P~wer

source DC

12V,

1.1

±1O%

Non-linearity

Horizontal;

±8% (±14% max.)

distortion

Vertical;

±8% (±12% max.)

Picture

tube

E2728B31;

90°

deflection

Geometrical

Pincushion

dist.;

{2%

max.}

explosion proof type

distortion

Barrel

disl.;

1% (2% max.)

Heater;

12V,

7SmA

Trapezoidal

dist.;

(2% rr,3x.)

1----.

Parallelogram

dist.;'o

(2.5°

max.)

IC's 2

pes.

High

voltil<;Je

Zero beam;

11.0kV

-I (1O.0kV,

min.,

Transistors 7

pes.

12.0kV,

max.)

----

Diodes 13

pes.

Power

pply

DC12.0V,

1.05A

(1.2A

max.)

Working

range

12V ±10% •

Sound

output

400mW

max. (440 Hz) Scan size

Horizontal;

10% (15% max.)

Speaker

Bern,

round

dynamiC

type

Vertical;

10% (15%

max.)

(32I2l

Horizontal

Control

knobs

Volume, V-Hold, lock"in range I

±300

(±100Hzlimit)

Contrast,

H-Hold, Vertical [

Brightness,

Focus

lock-in

range

-12

(-6

Hzlimit)

Working

440

Hz (OdB)

-10'e

SO°C

Audio

frequency

-10dB

±4dB

100 Hz

temperature

Characte~istic

-12dB

±4dB at

10kHz

-•

Sound

maxi- I 400mW at

440

mum

output

-----

• Cassette Tape Recorder Section

System

PWM

recording

BiaSing DC system

Erasing

system

Power

source

12V

(stabilizing) •

9.5V'"V16.5V (Non-stabilizing) Playback 667

J1sec.

333

J1sec.

sensitivity (standard)

Semi-

transistors Working

_10

+40°C

conductors

IC,

temperature

9 diodes

Storage

-2SoC

+65°e

Tape

From

C30

e60

temperature

---

Tape speed

4.75

cm/sec.

Track

2-track

monaural

type

~ -

Motor

Electronic

governor

motor

(12V}

L-_~

•

-2-

•

The MZ·80B system and expansion

thereof

are shown

the

block diagram

0.1

Fig.

The inside of

the

dotted

lines

the

constitution

the

MZ-808,

which units enclosed

thick-line frames are optional ones.

the

expansion

port,

interface cards can

inserted up

six pieces. The devices outside

the

dotted

lines are optional peripheral

devices and user's devices.

Figures 2 and 3 show the

front

view and rear view of the MZ-80B, identifying

the

parts with names.

r---------------------i

I MZ-80B

CRT

Display I

f I

Graphic

RAM

Rom

(RAM

8KBI

'v---

(MZ-80GMKI

32KB

2KB

I I

Graphic

Universal

c!-

RAM

18KB

Interface

PTR,

PTP,

etc.

RAM

IMZ-SOI021 I

32KB

V-RAM

Character

MODEM

2KS

RS-232C Teletvpewriter

Boot

Rom

etc.

2KB

IEEE-4SS

1.-

IEEE-488

Standard

Interface

I devices

CPU

°0

System

Bus

ZSOA

f-'

Printer

Interface

IMZ-SOP5')

Interface

Floppy

f- (MZ-SOFIJ Disk

(MZ-SOFB/FBKI

Key Board I

I I I

;<-

Interface

Hard

Disk

Sound

Ir-

Cassette r

MCR

Mark Card

Interface

Reader

Timer

1.1-

Calor

Color

Display

Intelligent

Interface

Terminal

I I

Color

Display

---------

______________

---l

Fig_

1 MZ-80B System and Expansion o

Options

Future

Development

-3-

Nonglare

_________

Screen

Special

function

_____

Keys

Main

Key

Board

______

--:

Brightness

_______

Control

Sound

Volume

Control

Power

recePtacle---""

Power

Switch

---------i..----

Ground-----------J

r---------------------------------

CRT

Display

r------------

Cassette

Tape

Compartment

!~~~J,~~~?i~i~~

Cassette

tape

Counter

~0ii!C=1-.

Fig. 2

Front

View

MZ·80B

Fig. 3

Rear

View

MZ·80B

Cassette deck

~---

Control

Keys

Cursor

Control

Keys

IPL reset

switch

~---"o<,e'

Switch

I/O

Module

Access

Window

No.

1-6

• •

•I

I •

• •

The system diagram

the MZ-80B

shown

Fig.

With the CPU and its

bus

lines

the center, the

memorie~

(main memory,

boot

ROM, V-RAMI, keyboard, cassette recorder, CRT display, clock, reset circuit, and I/O

port

are

arranged, showing the relations with PlO,

8225,

8253,

constitute

the

MZ-80B.

RESET

SWITCH

'IPL

RESET

SWITCH

FRAME

GROUND

-11-

nPOWER SWITCH

1 1

POWER UNIT

POWER

TC!ITv

ONIPL

-5V

RESET GROUND

C R

L-.

0 E

Z80A

CPU

CRYSTAL

£ 4MHz

OSCILLA-

MHZ'l

TOR

31.25kHz

'IPL

RESET ".." Initial Program Loader RESET

-5-

Main Memol)'

RAM

32k

bytes

IPL

ROM 2k bytes

RAM

32k

bytes

ADDRESS

SELECTOR

"r I

ADDRESS BUS

HAN

Z80A-PIO

POK

KEYBOARD

r--

Fig.

4 r

CHARACTER

SPEAKER

GENERATOR AUDIO .n

RoM

bytes

r;::::

AMPLIFIER

vLj

V-RAM

l-<--

, CRT

DISPLAY

-CHARACTER

-:v'

bytes

I'r

OSCILLA·

TOR

SHIFT

f=4

L , REGISTER

E VIDEO GENE·

V·RAM

T , RATOR

GRAPHIC I

------I

8k bytes

, I I

11 11

J1 -

11 11

V·RAM

P GRAPHIC II

11 11

, E 8k bytes

ADDRESS

BUS

R (OPTION)

=i~

II1I

, P

,....,

E 0

III

v R P

r A T

L I

[)NT

I 0

v / N

!.-

~ ~

SHAKE 0

8255 8253 R

C2 T

]~~

CASSETTE TAPE CASSETTE TAPE

DECK I/O DECK

~-80B

System Diagram

No. I

No. 6

•

The system comprises four main units.

For quick solution

most operational difficulties, follow

the

chart below

find which unit

causing

the

problem.

Start

Power on

YES

the

CPU

board normal?

YES

End

-7-

Repair

the

power -supply

circuit.

Repi3ir

the

monitor TV.

Repair

the

CPU

board.

Repair the cassette

recorder.

•

The

CPU

b~ard

composed of the following six blocks.

When

it malfunctions, first locate which block

concerned

with the malfunctions, and next try to check for its corresponding circuits; the wiring diagrams of every block will

shown separately.

CPU

inoperative

Display

block

Cassette

recorder

block

Keyboard

block

Audio

block

Clock

block

YES

noperative

YES

immediately

after

>------0-1

power

ON,

Check

RAM

and its

peripheral

circuits

{by

usinfj

RAM

checked,

Check

video

RAM

circuit.

Check IC23

(8255)

and its

peripheral parts,

Check

IC24

(LH0081A)

and

its

peripheral parts.

Check IC23

(8255)

and

its

peripheral

P<lrts.

----'

Check

IC19

(8253)

and its

peripheral parts,

Check

memory

circuit

and

its

peripheral parts,

•

Checki~g

rnetl1ods()f~~h

circuit -,,;

"I,

","

,,,'

•

",.

:.l.C.By.tbuChinglC package

fingers:c .

.•.

Ifthey

seem too

hot

heat

gene~atiori;

I(:::--j{ defective" le

'Idad

'is

'hea~'y

'or

~'~mporients

are

~ouc~~-

'"each'

other

(ROM

and V·RAM are

ex.~mpted

f;~m

this checking).

If.-

a circuitry state changes to,

an~ther;

Sold~ring

is-

poor, socket contact

impro'per or printed-

wiring

erroneous.

using a synchroscope:

•

the

relation between input and

output

of TTL

illogical, this means defe.etive

gate.

• Check if the voltage of TTL

specified: Highle,;el; over 2.4V"Low level; below O

5V.

• When the signal'is between the high and low levels,

~here

circuit t?uching or

malfunction?

-8-

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