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