Hitachi MP-3550 Technical Manual

I

1

I

F

BASIC

MASTER

LEVEL-3

Minif

loppy

Disk

Dr

j_ve

Unit

Mp

-

3550

ano

Minifloppy

Disk

Card

Mp

-

1

B02

SERVI

CE

MANUAL

1

982

CON

TEN

TS

1

.

General-.

2.

Features

3,

Specifications

ln.

Part Names

5.

Termj-nal

Connection

Specif

ication

6.

Explanation

of

f

Cs

in

Use

7,

Circuit Explanation

8.

Adj

ustment

Method

9.

Minifloppy

Disk

Card Expansion

Method

1

0

.

Servi

ee

P

oint

s

11

.

Trouble

Shooting

1

2

lr

5

21

2/+

5B

OJ

67

71

'l

.

GENERAL

x

l,IP

-3550

The MP

-

3550

minifloppy

Basic

Master

LeveI-3,

II

through

the

medium

is the outside memory

It

can store

and read

reliably.

The

MP

-

3550

UNI T-1

connected

up

to

the

disk

unit which is

connected

to the

M8-6890

and

Basic

Master

Level-3

Mark

of

the

mi-nif loppy di

sk

card

,

MP

-

1 802

,

equipurent f

or the

per

s

onal

c omputer

.

program

lists and

data

quickly

and

(ttre

first)

can be

activated once

Level-3 eonnector.

2.

MP-1 BO2

The

minifloppy disk

card,

MP

-1

802,

is inserted

in

the

expans

ion

slot of

the

Level-3

.

I

t

is the

Lev

eI-3

expansion

interface

card

which

enables

conneetion

with

the

MP

-

3550

UNI

T-1

(f

:-rst

unit) and the

MP-

3550

UNI T-2

(

second unit)

.

FEA TURES

x

MP

_

3550

1

.

Program recording and

reading is aceomplished quickly

and

reliably.

2. Data

input/output

and correction

can be

executed speed

ily.

Operation

is improved

with

the

inclusion

of

two built-in

drives.

MP-1802

3.

1.

2. Connecting the

MP

-

3550

UNI T-2

(

second expansion use

)

to

the MP

-

3550

UNI

T-1

(

tfre

f irst

)

,

expans

j-on

is

possible

.

...f2

3.

SPECIFICATION

3

-1

tlP

-3550

x

Data

Record Capacitv

UNI T 655 Kbytes

DRI

VE

328

Kbyte

s

Number

of sides

per

DRI VE

2

sides

No.

of cyfinders

per

DRI

VE

/+0

cylinders

No. of

sectors

per track

1

6

sectors

No. of data

per

sector

256

bytes

Note

:

The

above figures

may

vary depending

on

the

system

diskette

in

use.

Refer to the

system

disk

nanual

f

or details.

*

Environnent

Conditions

ftem

Te

mp erat ur e

Humidity

Max.

Wet

Bulb

Temperature

0perati-on

5oc

-

35oc

2or"

gof,

No

dew at

zgo c

Non

0perati

on

-1ooc-

/r5oc

B

1[

8oi[

Tran

sp or tat i on

-1ooc-

5ooc

B%

-

B0%

Note

:

During

non-operation

or

transportation,

the

head

protection

sheet should

be

placed

in

eaeh drive

afte

the disk has been

removed

from

the

minifloppy

disk

drive

MP

-

3550

.

/3

*

Specification

3

-2

t4P

-1

802

*

Spe

cifieation

Transfer

Speed 250

Kbi

L

f

sec

.

Record

Medium

5i

inch diskette

No.

of ICs

6e

No.

of

Transistors

56

No

.

of

Diode

s

75

P

ower

AC

100V

50/60

Hz

Power

Consumption

55W

Dimensions

27.0(W)

x

21

.O(H)

x

27.5(D)cn

We

ight

9.

o

kg.

Accessories

Dr:ive

belt

Drive

Capacity

MP-3550

x

2

units

(lr

drives)

I

C

Number

28

Transistor Number

lr

Diode Nunber

2

P ower

DC

+5V

Power Consumption

3W

Dirnens

ions

,1.0.0(W)

x

tr.5(jf-)

,x

23.5(D)

cm

We ight 0.31

kg.

.../4.

4.

PART

NAI'IES

4-l

.

MP-3550

oRrvE-0

ORIVE.I

drive

-1

drive-

2

power

switch

I roll

_

oFF

power

cord.

holder

fan

connector

(data)

POwer

Ccrrc

+-2. MP-|802

(-to

MP-355OttNIT-l)

l{DB-A

,C,8,

-I{DB-B

P.C.B.

-

'.-3

edge

conneetor

(to

J.eyel3)

power

lamp

.../5

5-1

Mp-

3550

connector

Ilor

Receptac]-e

connector

: c connector

I

L

50PL

Pin Header

:

C Connector

J

q

/

5.

TERMINAL

CONNECTTON SPECTFI

CATI..ON

No.

S

ignal

Data

Direction

Level-3c'

Inside

Expl-anati

on

1

HEAD

LOAD

Head

l-oad selected

drive

when

this signal

is

tL

I

2 SE_IEET-3

___-__--_->

When

rL |

,

enables

sendin5

and

receiving

of

Drive

3

s ignal

3

ET.DY

rL I

when diskette

i-s

rotating

normally

/,

INDEX

<-

Outputs

rLf

pulse

when

index hole

is

detected

after

diskette

is rota-

ted

5

m0

Enables

Drive

0

signal

sending

and

receiving

when

lL I

6 SIET1

------=-+

Enables

Drive

1

signal

sending and

receivi-ns

when

lL I

7

mffi

Enables

Dri've

2

signal

sending

and receiving

when

lL I

8

MOTOR

ON

Drive

motor operates

when

lL I

9

DI

RECTI

ON

IN

Control-s

head

movement

direction

10 S

TEP

t

+

Moves

the

head

one track

per

pulse

11 i[mTETlm

Write

data signal to

the

diskette

12

WRI

TE

GATE

Writing

is

possibl-e

when

tL t

13

TRACK

OO

Becomes

tL

t

when head

is

in

Track 00

position

1l+

WRI

TE

PROTECT

Becones

rL

q

when

write

protected

disk is

inser:ted

...

/6

No.

S

i

gnal

Data Direction

Level-3**Inside

Explanati

on

15

READ DATA

Reads

out

data s ignal

from

the

diskette after

waveform restoration

16 mE1

Sel-ects

Side

t head

when

tLt

,

Side

0

head when

tH

t

17

D-RCLK

Clock

signal to divide

data

bit

and clock bit

from

READ DATA

1B

+5v

+

5V

power

supply

19

T t

20

21

zz

23

2/,1

J

25

+

5v

26

DOUBLE DEN

Becomes

rHr

when writing

and

recording

of double

dens

ity

27

GND

GROUN

D

2B

1 i

2g

30

31

)1

33

3lr

35

36

37

.,

.

/7

No.

S

igna 1

Data

Direction

Level-3oInside

E*planation

38

39

lr0

/+1

/+2

lr3

/+ lt

lr5

lr6

/+7

J

I

l+8

GND

lr9

50

rr--fr

=

Unused

termi-nal

.../8

5

-2

MP

-

3550

Drive

0,

1

Unit

Connector

(l

tp

P

in

Header

:

E

Connector

)

No.

S

ignal

Data

Direction

fnside

H

MDD

Explanation

1

GND

GRO

UN D

z

HEAD

LOAD

-

Head loads

when

rrLrf

(

when

REA

DY

-

rr

L

tf

in

selected

drive)

1

GND

GRO

UN D

l

4

GND

<---.-->

GRO

UN D

5

GND

GRO

UN

D

6

nnalv

Becomes

rrLrr

when

the

disk rotates norma11y.

7

nnTn

LJII

]J

GROUND

B

INDEX

0utput

tfLrr

pulse

when

i-ndex hole is detected

after

diskrs

rotation.

GND +-+

GRO

UN D

10

Sgi,gCT

O

Enables

drive

0

sig.

receive/sendable

when

Itr

rl

!1

.

11

GND

GRO

UN D

12

SEIEMl

When

rfL

rr

,

enable s s end-

ing

frecei-ving

of

drive

1.

13 GND

GROUN

D

4t

t4

t\

GND GROUND

to

MOTOR

ON

Drive

motor

oDerate

s

when

lf

L

lf

.

17

GND

GRO

UN D

18

m Control

head

move

di-

rection.

1g

GND

GRO

UN D

...

/g

No.

S

ignal

Data Direction

Inside

c+

MDD

Explanation

20 s-m Moves the head one

track

per pulse

21

GND <-----€

GROUND

22

WRI

TE

DATA

Write data sig. to

the

disk

23

GND

4

GROUND

2/+

WRT

TE

GATE When

frLrr,

enable

write

25

GND

c---------)

GRO

UN D

26 TRACK OO

-------'

Be

c

ome s

fr

L

rf

when

head

is in

track

00 position

27

cNl

GROUND

2B WRI TE

PROTECT Beeomes

lrLll

when

write

protected

disl

is inserted

2g

GND

-

GROUND

30

READ

DATA

Read

data

s ig

.

from

the di-sk.

31

GND

<__--------)

GROUND

32

SI

DE.T

Seleet

side

t head

when

frLrtrside

0

heac

when

fr

Hil

33

GND

<___--+

GROUND

3lr

tr

--rr

=

unused

terminal

...

/10

ItJ

5

-3

MP

-

3550

UNI T-2

TERMINAL

PARTS

No.

S

ignal

Data

Direction

Level-3<+fnside

Exnlanat

i

on

a

I

HEAD

LOAD

Head

load

the

selected

drive when

rL

I

3

REA DY

Becomes

rL

I

when disk

rotates

normally

lr

INDEX

0utputs

rL I

pulse

when

index hole

is

detected

af ter disk

I

s rotati-on

5

SELEcro

When

tL t,

enables send-

itg

f

receiving the

Drive

0

s ignal

6

SELECT

1

--?

Enables Drive

1

signal

s end

ing

f

r e ce

iv ing

ih"rt

lT I

7

tuoton oll

--->

Drive

motor operate s

when

lL I

9

m

Controls

head movement

direction

10

d mnn

\IHP

V

LJ-IL

M

ove

s head

one track

per puls

e

11

WRI TE DATA

----)

Wr

ite

data

s

ignal

t

o

diskette

12

WRI

TE

GATE

--_-J

Writing

is possible

when

rL

r

13

TRA

CI{ O O

Becomes

rL

I

when head

is

in

Track 00

Dosition

1/+

WRI

TE PROTECT

Becomes

rL

I

when write

protected

disk is

inserted

15

mmIn

F--

Reads

out

data s ignal

from diskette

after

waveform restoration

16

STIE-]

--)

Selects Side'1

head when

rL |

,

Side

0

head

when

rH

t

17

D-RCLK

Cl-ock

signal

to divide

data bit and clock

bit

from

READ DATA

...

/11

No.

S

ignal

Data

Direction

Level-3<--.+lnside

Explanation

1B

1g

20

21

22

23

2/+

25

26 DOUBLE

DEN

_-....--

Becomes

fH I

with

writing

and

recording

of

double

dens

ity

27

GND

GROUND

2B

1

2g

30

31

32

33

3L

35

36

37

3B

39

/+0

l+1

l+2

lr3

/, lr

,

.

/12

No,

S

ignal

Data

Direction

Level-3e'-Inside

E*planat

i on

lr5

/r6

t7t

4l

J

/+8

GND

).4

.+/

50

fr---rt

=

unused

terminal

...

/13

5.1

MP-1 BO2 UNI

T.1 CONNECTION

CONNECTOR

No.

S

ignal

Data Direction

Ins

ide G+UNI

T

1

Exol-anation

I

fi]il[D-ImD

When

rL

t,

head loads

selected drive

2 SELECT

3

When

tLt,

enables

sending

freceiving

of

Drive

3

signal

3

MTffi

Becomes

rL

I

when

disk

r

otate

s

normally

/+

rm-ET Outputs

rL I

pulse

when

index

hole

is

dete

cted

after

diskfs rotation

(

ffio

---.9

When

tLr,

enables

sending

freceiving

of

Drive

0

s

ignal

6 SELECT

1

When

tLt,

enables

sending

/"uceiving

of

Drive

1

signal

7

sj;Em

When

rLr,

enables

sending

f

receiving

of

Drive

2

signal

B

MOTOR ON

Drive

motor

oDerate

s

when

rL I

9

DI

RECTION

IN

Contr

ols

head movement

direction

10 S TEP

Moves

head

one track

per pulse

11 WRI

TE

DATA

Write

data signal

to

diskette

12

WRI

TE

GATE

Writing

is

possible

when

rL I

13

TRACI{O6'

Becomes

rL

I

when head

is

in

Track 00 positior

1/+

WRI

TE

PRO

TECT

(-

Becomes

rL

I

when write

protected

disk is

inserted

15

READ

DATA

a-

Reads

out

data

signal

from diskette

after

waveform restoration

16

SIDE

1

.--=+

Selects

Side

t head

when

tLr,

Side

0

head

when

rHr

.

. .

/1/n

No.

S

igna

1

Data

Direction

f nside.*UNI

T

1

Explanation

17

D-RCLK

Clock

signal

to divide

data

bit and

clock bit

from

READ

DA

TA

18

+5v

1g

t

I

20

21

22

23

2/+

I

25

+5v

26

DOUBLE

DEN

Becomes

rHr

with

writing

and

recording

of

double

dens

ity

27

GND

-

GROUND

28

I

2g

30

31

32

33

3lr

35

36

37

38

39

/+0

/,r1

.../15

No.

S

ignal

Data

Direction

Inside*+UNI

T

1

Explanat

i

on

/+2

/r3

/,

lr

lr5

/+6

/+7

I

/+8

GND

/-9

50

l---l

=

Unused terminal

.../16

5-5

MP-1802 Card

Edge

Connector

(Unn-A

PCB)

No.

S

ignal

Data

Directi-on

Level-3;Inside

E"planation

1

Data

bus

2

3

DO

lr

D1

5

D2

(-j

6

D3

7

D/+

<--+

8

D5

c--__J

9

D6

(-________)

10

D7 e------------?

11

AO

.-__)

Addre

s s

bus

12

A1

--.....=-)

13

A2

--

1/+

A3

15

A/+

16

A5

17

A6

18

A7

1g

A8

----=+

20

A9

21 A1 0

--_---+

22

A11

---+

23 A1 2

2lr

A1

3

25

A1 /+

:--::--)

26

A1

5

-----------+

27

.

..

/

j7

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