Hitachi MP-1802 User manual

I
I
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
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.
TheMP
-
3550
UNIT-1
connected
up to the
disk unit which is connected to the
M8-6890 and Basic Master Level-3 Mark
of the mi-nifloppy di sk card , MP
-
1802
,
equipurent f or the per
s
onal computer
.
program lists and data quickly and
(ttre first) can be activated once
Level-3 eonnector.
2.
MP-1BO2
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 UNIT-2 (
second unit) .
FEATURES
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 UNIT-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
UNIT 655 Kbytes
DRI VE 328 Kbyte
s
Number of sides
per DRIVE 2 sides
No. of cyfinders
per DRI
VE /+0 cylinders
No. of sectors
per track 16 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
mperat ure Humidity Max. Wet Bulb
Temperature
0perati-on 5oc
- 35oc 2or" gof, No dew at
zgoc
Non
0perati on -1ooc- /r5oc B
1[ 8oi[
Tran
sportat 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
s75
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
Power DC
+5V
Power Consumption 3W
Dirnens
ions ,1.0.0(W)
x tr.5(jf-)
,x 23.5(D)
cm
Weight 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
II
L
50PL Pin Header : C Connector J
q
/
5. TERMINAL
CONNECTTONSPECTFI
CATI..ON
Pin
No. S
ignal Data Direction
Level-3c' Inside Expl-anati on
1HEAD
LOAD Head l-oad selected drive
when this signal is tL I
2SE_IEET-3 ___-__--_-> When rL|
, enables sendin5
and receiving of Drive 3
signal
3ET.DY rL I when diskette i-s
rotating normally
/, INDEX <- Outputs rLf pulse when
index hole is detected
after diskette is rota-
ted
5m0 Enables Drive 0 signal
sending and receiving
when lL I
6SIET1 ------=-+ Enables Drive 1 signal
sending and receivi-ns
when lL I
7mffi Enables Dri've 2 signal
sending and receiving
when lL I
8MOTOR ON Drive motor operates
when lL I
9DI
RECTI
ONIN 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 tLt
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

Pin
No. S
i gnal Data Direction
Level-3**Inside Explanati on
15 READDATA Reads out data signal
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 Tt
20
21
zz
23
2/,1 JJ
25 +
5v
26 DOUBLEDEN Becomes rHr when writing
and recording of double
dens
ity
27 GND
GROUN
D
2B 1i
2g
30
31
)1
33
3lr
35
36
37
., . /7

Pin
No. S
igna1 Data Direction
Level-3oInside E*planation
38
39
lr0
/+1
/+2
lr3
/+lt
lr5
lr6
/+7 JI
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
)
Pin
No. S
ignal Data Direction
fnside H MDD Explanation
1GND GRO
UND
zHEAD
LOAD -Head loads when rrLrf
(
when REA
DY
- rr
L
tf in
selected drive)
1GND GRO
UND
l
4GND <---.--> GRO
UND
5GND GRO
UN
D
6nnalv Becomes rrLrr
when the
disk rotates norma11y.
7nnTn
LJII ]J GROUND
BINDEX 0utput tfLrr pulse when
i-ndex hole is detected
after diskrs rotation.
GND +-+ GRO UND
10 Sgi,gCT OEnables drive 0 sig.
receive/sendable when
Itr rl
!1 .
11 GND GRO UND
12 SEIEMl When rfL
rr
,
enables send-
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 UND
18 mControl head move di-
rection.
1g GND GRO
UND
... /g

Pin
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 4GROUND
2/+ WRT TE GATE When frLrr, enable
write
25 GND c---------) GRO
UND
26 TRACKOO -------' Be
c
omes fr
L
rf when
head is in track
00 position
27 cNl GROUND
2B WRITE PROTECT Beeomes
lrLll when
write protected disl
is inserted
2g GND -GROUND
30 READ
DATA Read data sig . from
the di-sk.
31 GND <__--------) GROUND
32 SIDE.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 UNIT-2 TERMINAL
PARTS
Pin
No. S
ignal Data Direction
Level-3<+fnside Exnlanat i on
aIHEAD
LOAD Head load the selected
drive when rL I
I
3READY 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
5SELEcro When tLt, enables send-
itg f receiving the Drive
0 signal
6SELECT
1--? Enables Drive 1 signal
send
ing f r ece
iv ing ih"rt
lT I
7
tuotonoll ---> Drive motor operate s
when lL I
9mControls head movement
direction
10 d mnn
\IHP
V LJ-IL M
ove
s head one track
per puls e
11 WRITE DATA ----) Wr
ite data s
ignal t o
diskette
12 WRI TE GATE --_-J Writing is possible when
rL
r
13 TRA CI{ OO 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 signal
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 READDATA
... /11

Pin
No. S
ignal Data Direction
Level-3<--.+lnside Explanation
1B
1g
20
21
22
23
2/+
25
26 DOUBLE
DEN _-....-- Becomes fHI 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

Pin
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-1BO2UNI
T.1 CONNECTION
CONNECTOR
Pin
No. S
ignal Data Direction
Ins ide G+UNI
T 1Exol-anation
Ifi]il[D-ImD When rL t, head loads
selected drive
2SELECT
3When tLt, enables
sending freceiving of
Drive 3 signal
3MTffi Becomes rL I when disk
r otate s normally
/+ rm-ET Outputs rLI pulse when
index hole is dete
cted
after diskfs rotation
(ffio ---.9 When tLr, enables
sending freceiving of
Drive 0 s
ignal
6SELECT
1When tLt, enables
sending
/"uceiving of
Drive 1 signal
7sj;Em When rLr, enables
sending
f receiving of
Drive 2 signal
BMOTORON Drive motor oDerate
s
when rLI
9DI
RECTION
IN Contr
ols head movement
direction
10 STEP Moves head one track
per pulse
11 WRI
TE DATA Write data signal
to diskette
12 WRI
TE GATE Writing is possible
when rLI
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

Pin
No. S
igna 1Data Direction
f nside.*UNI T 1Explanation
17 D-RCLK Clock signal to divide data
bit and clock bit from READ
DA
TA
18 +5v
1g tI
20
21
22
23
2/+ II
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

Pin
No. S
ignal Data Direction
Inside*+UNI T 1Explanat i on
/+2
/r3
/,lr
lr5
/+6
/+7 II
/+8 GND
/-9
50
l---l = Unused terminal
.../16

5-5 MP-1802 Card Edge Connector (Unn-A PCB)
Pin
No. S
ignal Data Directi-on
Level-3;Inside E"planation
1
Data bus
2
3DO
lr D1
5D2 (-j
6D3
7D/+ <--+
8D5 c--__J
9D6 (-________)
10 D7 e------------?
11 AO .-__)
Addre
ss bus
12 A1 --.....=-)
13 A2 --
1/+ A3
15 A/+
16 A5
17 A6
18 A7
1g A8 ----=+
20 A9
21 A10 --_---+
22 A11 ---+
23 A12
2lr A1
3
25 A1/+ :--::--)
26 A15-----------+
27
. .. / j7