Zenith Data Systems SM-H-17-1 User manual
SM-H-17-1
Floppy
Disk
Drive
Service Manual
.
2NI'.
data
~
systems
585-10-01
ZENITH DATA SYSTEMS
SAINT JOSEPH, MICHIGAN 49085
Copyright ©1982
Zenith Data Systems
All Rights Reserved
Printed in the United States of America
ul~
R.~~K~VE
TABLE OF CONTENTS
SPECIFICATIONS 1-1
SETUP 2-1
Programming
2-1
Hard-Sectored 2-1
Soft-Sectored 2-1
Cable
Connections
2-2
OPERATION. .............................
..
3-1
SERVICE 4-1
Quick
Checks ...........................
..
4-1
Rotational
Speed
Test
4-2
REPLACEMENT PARTS LIST 5-1
~m~K~~
~11-1
SPECIFICATIONS
5-1/4" Floppy Disk Drive.
48 TPI.
Single Read/Write Gap Head.
Rotational
Speed
-300
rpm
(200 octal).
Power: +
12
VDC.
Programmable for Hard-Sectored or Soft-Sectored
Controllers.
141~
~m~~E
flOPPY
IMSK
DRIVE
12-1
INSET
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PROGRAMMING
MODULE
PROGRAMMING
MODULE
NOTE,
CONNECTOR
PINS
AT
HM
MUST REMAIN
,
__
"OPEN IUNSHORTENEDI.
1
.....
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;
PART
A
PART
C
I.....
..1
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NOTE:
CONNECTOR
PINS
I;
AT
HM
MUST
REMAIN
_,,,'OPEN
WNSHORTENEDI.
1
.....
..1
1
.•..•..
1m
CUI
NOTE,
CONNECTOR
PINS
, ;
AT
HM
MUST
REMAIN
-
~'\pPEN
IUNSHORTENEDI.
1
.....
..1
1
.....
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I
PART
B
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INSET
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PROGRAMM I
NG
MODULE
NOTE:
CONNECTOR
PINS
AT
HM
MUST
REMAIN
__
"OPEN lUNSHORTENEDI.
I......
.1
;
PART
C
PART
B
PART
A
NOTE:
CONNECTOR
PIN~
AT
HM
MUST
REMAIN
__
."OPEN (UNSHORHNEDI.
1
.......
1 I
.......
m
CUI
1
.....
..1
1
.....
..1
~
NOTE:
CONNECTOR
PINS
AT
HM
MUST
REMAIN
__
"OPEN WNSHORTENEDI.
1
.....
..1
I
.....
..I~
-tl-,::::::::::::
CUT
PROGRAMMING
I
.......
1 1
.......
1Q
MODULE
fj
I ;
I
If this drive is to be hardware
unit
0, either bend out
the leg of the programming module or cut the pro-
gramming module links as shown
in
Part Aof Figure
2-2.
If this drive is to be hardware
unit
2,
either bend out
the leg
of
the
programming module or cut the pro-
gramming module links as shown in Part Cof Figure
2-2.
If you intend to use this drive with adouble-density
controller, referto Figure
2-2
(fold-out from this page)
for the following programming steps.
To set up aprogramming module, you may either
cut
the link on the module or bend out the appropriate
leg. The advantage of bending out the leg is that you
may return the module to its original state.
SOFT·SECTORED CONTROLLER
(Double-Density)
If
this drive is to
be
hardware
unit
1,
either bend out
the leg of the programming module or cut the pro-
gramming module links as shown in Part BofFigure
2-2.
SETUP
To sel
up
aprogramming
module.
you may
either
cui
the link on the moduie or bend out the
appropriate
leg. The advantage of bending out the leg is that you
may return the module to its original state.
HARD·SECTORED CONTROLLER
Programming
If
this drive is to be hardware unit 0, either bend out
the leg of
the
programming module or cut the pro-
gramming module links as
shown
in
Part Aof Figure
2-1.
If
this drive is to be hardware
unit
2, either bend out
the leg of the programming module or cut the pro-
gramming module links as shown in Part Cof Figure
2-1.
If
this drive is
to
be
hardware
unit
1,
either
bend
out
the leg of the programming
module
or cut the pro-
gramming module links as shown in Part Bof Figure
2-1.
If
you intend' to use this drive with the H·88-1 hard-
sectored controller (or with
an
H-17 controller in
an
H·B),
perform the steps under "Hard-Sectored Con-
troller." Refer to Figure
2-1
(fold-out from this page)
for
the
following
programming
steps.
Figure
2-1
Figure
2-2
•
2-2iL.--
FLOPPY
DISK
DRIVE
Cable Connections
Refer to Figure 2-3 for a
view
of cable connections.
Figure
2-3
Floppy Disk Drive.
Part
number
HE
150-91.
•
•
•
~m~~E
~'1~1
OPERATION
DISKETTE LOADING
Refer to Figure
3-1,
open
the
front
panel
door,
and
insert
the
diskette, label towards
the
screen.
Then
close the door.
DISKETTE HANDLING
The
diskette can
be
easily damaged.
Handle
it care-
fully as follows:
1.
Keep
the
diskette
in
its
storage
envelope
whenever it is
not
in
the
Floppy
Disk Drive.
2.
Keep
the
diskette away from
magnetic
fields.
Magnetic fields
can
distort
the
recorded data
on
the
diskette.
LA
BE
L
SIDE
OR
IDIS
KETTE
I
3. Replace damaged or
worn
storage envelopes.
4.
Write on
the
plastic jacket only
with
afelt-tip
pen.
Do
not
use
alead pencil or ball-point pen.
5. Keep
the
diskette away from
hot
or contaminat-
ing materials.
6. Do not expose
the
diskette
to
sunlight.
7. Do not
touch
or clean
the
surface of
the
diskette.
Abrasions
can
alter stored data.
IDISKETTEI
Figure 3·1
, I
u
u
u
~m~KD~E
1~1
SERVICE
QUICK
CHECKS
•Check
the
drive belt.
•Check
the
flat cablefor
proper
connection
to
the
drive.
•Check
the
power
plug for
proper
connection
to
the
drive.
•Check for
12
VDC
at
the
power
plug.
•Check
the
rotational speed.
•Check
the
programming
plug
for
proper
programming
and
check
the
drive
for proper
location.
~2J
R~"~~E
ROTATIONAL SPEED TEST
If
this
drive is
used
with
the
hard-sectored, single-
density controller (H-88-1 or H-17), perform
the
fol-
lowing
"Speed
Test."
If
this drive is
used
with
asoft-sectored, double-
density controller, perform
the
rotational
speed
tests
as described
in
the
system software documentation.
Speed Test
This test will check
the
rotational speed of
the
floppy
diskdrive. After
the
test starts, it will display
the
disk
drive speed test message
and
a
"speed
equals" mes-
sage as follows:
Disk drive rotational speed test
Drive
speed
=
The
word "Working" will
be
flashed
on
and
off
at
the
home
position
and
adrive speed
number
(in octal),
which
should
be as close to 200 as possible, will
update
with
each flash on
the
screen.
The
rotational
speed tolerance is
one
percent.
The
displayed value
should
be
between
166
and
212 (remember, octal
numbers jump from 177
to
200). Do not adjust
the
speed unless it is out of tolerance.
The
drive
unit
has acontrol labeled R30 or R7,
which
is used tovary
the
drive speed. This control is located
near
the
loweredge of
the
circuitboard or
on
the
other
side of
the
drive as
shown
in
Figure 4-1. This adjust-
ment
may
be
extremely sensitive, so
if
an
adjustment
is necessary,
do
not
turn
it
far
in
either direction. Less
than
one degree ofrotation
in
either direction
should
bring
the
drive
speed
into
tolerance.
Turn
the
control
clockwise to decrease
the
speed
or counterclockwise
to increase it.
You mayhaveto performthistestagain
at
somefuture
time,
depending
upon
how
heavily
the
floppy isused.
As
the
drive bearings wear,
the
speed
may
change
slightly. Fluctuations
within
the
toleranceare normal
and
may be attributed
to
variations
in
temperature
and
humidity.
•Plug
in
the
line
cord
and
turn
on
the
Compu-
ter.
•Refer to Figure4-1, install adiskette
into
the
drive as
shown,
and
close
the
door.
The
test
will
not
start
until
this
is done. Also,
the
test
will not damage the
data
on
the
diskette.
OR
Figure
4·1
~m~K~VE
~1~3
•Be
sure
the
OFF LINE key is
up
(out).
Then
obtain
the
"H:"
prompt.
(Simultaneously
push
the
right-hand
SHIFT
and
RESET keys
if
necessary.)
•
Type
G7372,®.
The
total
entry
will be:
H:
Go
7372
'®
and
the
test
will
start.
•
If
you are
using
an
H-8
with
an
H-17, refer
to
"Rotational
Speed
Adjustment"
in
the
H-17
Operation Manual.
•
If
the
drive
speed
is
less
than
166 or greater
than
212, carefully adjust R30 or
R7
with
a
small screwdriver
until
the
speed
is
within
tolerance
and
as close to 200 as possible.
•
Simultaneously
push
the
right-hand
SHIFT
and
RESET keys to stop
the
test.
•Remove
the
diskette from
the
drive
unit.
•
Turn
off
the
Computer
and
unplug
the
line
cord.
~1_------------
~m~~E
REPLACEMENT PARTS LIST
PART NUMBER
HE 150-91
HE 134-1087
HE 448-432
HE 448-412
HE 969-59
DESCRIPTION
Floppy disk drive
Cable -drive
to
computer
Media -double-density,
single-sided
Media -single-density,
single-sided
Programming module
u
Table of contents
