Shugart SA800 Manual de usuario
..
A0/801
~
Disket
Storag
ive
~D
~
23
@J
23
Cf2)
@
~
@J
23
~
@J
I
©
Copyright
1977
Shugart
Associates
SA800/80l
~
Diskette
Storage
Drive
~D
~
23
@)
23
C?2J
@
~
@)
23
~
@)
I I
.J'J®ShUgart
Associates
TABLE
OF
CONTENTS
Section
Maintenance
Features
Page
2
3
4
5
6
7
8
9
Diagnostic
Techniques
Preventive
Maintenance.
Removals
Adjustments
.
Physical
Locations
. .
SA809
Exerciser
Connections
SA800/801
PCB
Component
Locations
SA800/801
Logic
Manual.
. .
SA800/801
Schematic
Diagrams
3
5
7
17
21
22
23
31
1.0
MAINTENANCE
FEATURES
1.1 Alignment Diskette
The SA120 Alignment Diskette
is
used for align-
ment
of
the
SA800/80l.
The following adjust-
ments can be made using the SA120.
1.
R/W Head radial alignment using track 38.
2. R/W Head azimuth alignment using track 76.
3. Index Photo-Detector Adjustment using tracks
01
and 76.
4. Track 00
is
recorded with standard
IBM
3740
format.
5.
TK
75 has
If
+
2f
signal for load pad adjustment.
Caution should be exercised in using the SA120
Alignment Diskette. Tracks
00,
01,36,37,38,39,
40, 75, and 76 should
not
be written on. To do
so
will destroy pre-recorded tracks.
1.2 SA809 Exerciser
The SA809 Exerciser
is
built
on
a
PCB
whose
dimensions are
8"
x
8".
The Exerciser
PCB
can be
used in astand alone mode or it can be built into
atest station or used in atester for field service.
The Exerciser is designed
to
enable the user
to
make
all
adjustments and check outs required on
the
SA800/80l
drives, when used with the SA120
alignment diskette.
The exerciser has no intelligent data handling
capabilities
but
can write
both
If
and
2f
frequen-
cies. The exerciser can enable read in the drive
to
allow checking
of
read back signals.
Refer
to
Section 6for illustration.
1.3
Special
Tools
The following special tools are available for
performing maintenance on the SA800/80
1.
Description
AlignmentDiskette
Cartridge Guide Adj. Tool
Head Penetration Gauge
Load Bail Gauge
Exerciser
Spanner Wrench
Part Number
SA120-1
50377-1
50380-0
50391-0
50619-0
50752-0
3
2.0 DIAGNOSTIC TECHNIQUES
2.1 Introduction
Incorrect operating procedures, faulty program-
ming, damaged diskettes, and
"soft
errors" created
by airborne contaminants, random electrical noise,
and other external causes can produce errors
falsely
attributed
to
drive failure or misadjustment.
Unless visual inspection
of
the drive discloses
an
obvious misalignment or
broken
part,
attempt
to
repeat the fault with the original diskette, then
attempt
to
duplicate fault
on
second diskette.
2.2
"Soft Error" Detection
and
Correction
Soft errors are usually caused by:
1.
Airborne contaminants
that
pass between the
read/write
head
and
the disk. Usually these
contaminants can be removed
by
the cartridge
self-cleaning wiper.
2. Random electrical noise
that
usually lasts for a
few
f.1
sec.
3. Small defects in the written data
and/or
track
not
detected during the write operation
that
may cause asoft error during aread.
4. Worn or defective load pad.
The following procedures are recommended
to
recover from the above mentioned soft errors:
1.
Reread the track
ten
(10)
times or until such
time
as
the
data
is
recovered.
2.
If
data
is
not
recovered after using step
1,
access
the head
to
the adjacent track in the same
direction previously moved,
then
return
to
the
desired track.
3. Repeat step
1.
4.
If
data
is
not
recovered, the error
is
not
recoverable.
2.3 Write Error
If
an error occurs during awrite operation, it will
be detected on the next revolution
by
doing aread
operation, commonly called a"write check." To
correct the error, another write and write check
operation must be done.
If
the write operation
is
not
successful after ten
(10)
attempts
have been
made, aread operation should be
attempted
on
another track
to
determine
if
the media or the
drive
is
failing. If the error still persists the diskette
2.6 Test Points--800/801
should be replaced
and
the above
procedure
repeated.
If
the failure still exists, consider
the
drive defective.
If
the failure disappears, consider
the
original diskette defective and discard it.
2.4
Read
Error
Most errors
that
occur
will be
"soft"
errors.
In these cases, performing an error recovery
procedure
will recover
the
data.
2.5 Seek
Error
1.
Stepper
malfunction.
2.
Improper
carriage
torque.
To
recover from aseek
error
recalibrate
to
track
00
and
perform
another
seek
to
the original track.
TP 1
2
3
4
5
6
7
10
11
12
16
21
24
25
26
27
Read
Data
Signal
Read Data Signal
Read Data (Differentiated)
Read Data (Differentiated)
Signal
Ground
Signal
Ground
Signal
Ground
-
Index
+
Head
Load
-
Index
and 801 Sector Pulses
+Read Data
-Data Separator Time +1
-
Data
Separator Time +2
+Write
Protect
+
Detect
Track 00.
+
Gated
Step Pulses
2.7Test Point Locations
1
II
•
CD
•J5 10
•
CD
11
0
7J2
P2
0
25
26 0
012 A
20
P1
J1
CD
~
J6CD
27
•
49 0
21
10
0 0
16
0
0
24 2 1
0010
~
0
6J3
ii
04350
000
P3
4
Otros manuales para SA800
2
Este manual sirve para los siguientes modelos
1
Tabla de contenidos
Otros manuales de Almacenamiento de Shugart
Shugart
Shugart Kennedy 9610 Manual de usuario
Shugart
Shugart SA450 Manual de usuario
Shugart
Shugart Kennedy 9600B Manual de usuario
Shugart
Shugart SA800 Manual de instalación y operación
Shugart
Shugart SA900 Manual de usuario
Shugart
Shugart Kennedy 9660 Manual de usuario
Shugart
Shugart SA 400 minifloppy Manual de usuario
Shugart
Shugart SA1000 Manual de usuario
Shugart
Shugart SA860 Manual de usuario
Shugart
Shugart SA800 Manual de usuario
Manuales populares de Almacenamiento de otras marcas
Spectra Logic
Spectra Logic T-Series Spectra T50e Manual de usuario
Panasonic
Panasonic LKM-F931-1 Manual de usuario
Tabernus
Tabernus Enterprise Erase E2400 Manual de usuario
Rocstor
Rocstor COMMANDER 3F series Manual de usuario
HP
HP P9000 Manual de usuario
Western Digital
Western Digital Ultrastar Data60 Manual de usuario