Seagate ST8741J User manual

Sabre Disc Drive
ST8741JIN, ST8851JIN
ST81123J, ST81154K OKO-Sol.
ST81236JIK!N t);co..!'~t
Maintenance Manual
(All Interfaces)
--r----------c55)> Seagate

WARNING j
Do not attempt to install, operate, or repair the unit,
before you read the important safety information located
directly after the table of contents in this manual.
Failure to follow that and other safety precautions in this
manual could cause injury to yourself or others.
WARNING j
This equipment generates, uses and can radiate radio
frequency energy and if not installed and used in accordance
with the instructions manual, may cause interference to
radio communications. It has been tested and found to
comply with the limits for a Class A computing device
pursuant to Subpart J of Pa,rt 15 of the FCC Rules which are
designed to provide reasonable protection against such
interference when operated in a commercial environment.
Operation of this equipment in a residential area is likely
to cause interference in which case the user, at his own
expense, will be required to take whatever measures may be
required to correct the interference.
If the operator or status/control panel (component assembly)
is not installed in the inner drawer, it is your
responsibility to provide any additional RFI shielding or
grounding needed to ensure FCC Class A compliance.
KOR 0756

~
I
r
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Sabre Disc Drive
ST8741J (97200-736)
ST87 41 N (97201-736)
ST8851J (97200-850)
ST8851 K (97209-850)
ST8851 N (97201-850)
ST81123J (97200-11G)
ST81154K (97229-11G)
ST81236J (97200-12G)
ST81236K (97209-12G)
ST81236N (97201-12G)
Maintenance Manual
(All Interfaces)
General Maintenance Information
Trouble Analysis
Repair and Replacement
Publication Number: 83325720-F
CS)> Seagate

REVISION RECORD
I
REVISION DESCRIPTION I
~~~~~~.L-~~~~--~~~~~~~~~~~~~~~~~~I
01
(02-09-B7)
02
(04-22-B7)
A
(05-29-B7)
B
(12-14-B7)
c
(OB--12- BB)
D
(Ol-23-B9)
E
(OB-09-B9)
F
(03-29-90)
Prereleased. Information in this edition is I
subject to change without notice. I
Revised to move theory of operation section to I
publication B3325690. I
Manual released. This edition obsoletes all I
previous editions. I
Manual revised to document B50 MB and 1230 MB I
drives, IPI interface, voltage converter, I
technical and editorial changes. All but most I
basic electrical checks removed, and Repair & I
Replacement moved to section 3. 'This edition I
obsoletes all previous editions. I
Manual revised to document 1120 MB drives and I
1230 MB SCSI drives. Technical and editorial I
!changes. This edition obsoletes all previous I
I
editions. I
!Manual revised to document 1153 MB IPI I/O two- I
lhead parallel drives and SMD I/O drives with \
!voltage converters. Technical and editorial I
!changes. This edition obsoletes all previous I
I editions. I
!Manual revised to add air baffle and Error Codes I
lfor SCSI High Performance drives. Technical and I
!editorial changes. This edition obsoletes all I
!previous editions. I
!Editorial changes only. I
I I
I I
I I
I I
I I
~~~~~~-'-~~~~~~~--~~~~~~~~~~~~~~~~~!
REVISION LETTERS I, 0, Q AND X ARE NOT USED.
© 19B7,BB,B9,90
By Seagate Technology, Inc.
Technical Publications Department
12701 Whitewater Drive
Minnetonka, MN 55343
We value your comments. A comment Sheet is provided at the
back of this manual.
Printed in the United States of America
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B3325720 F
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LIST OF EFFECTIVE PAGES
This manual is at rev1s1on F . Each page in your
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83325720 F
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PREFACE
This manual contains maintenance information for the Seagate
PA8XX SABRE eight-inch module drive. It is prepared for
customer engineers and other technical personnel directly
involved with maintaining the drive.
The information in this manual is presented as follows:
Section 1 - General Maintenance Information. Contains
information on warnings and precautions.
maintenance tools and materials. testing the
drive. and accessing the drive for maintenance.
Section 2 - Trouble Analysis. Contains procedures and
information to assist in troubleshooting the
drive.
Section 3 - Repair and Replacement. Contains procedures and
information on the replacement of drive
assemblies.
New features. technical changes. additions. and deletions in
this manual are indicated as follows:
• A vertical bar in the outer margin of a page marks the
changed area.
• A
dot by the page number indicates the entire page
contains new or changed information.
• A vertical bar by the page number indicates the
information was moved from another page. but there were
no technical or editorial changes.
The following manuals apply to the SABRE and are available from:
83325720 F
Seagate Technology. Inc.
Customer Services
12701 Whitewater Drive
Minnetonka. MN 55343
Phone: [phone]
Fax: [phone]
f-5

Publication No.
83325660
83325690
83325700
83325710
83325720
83325730
83325810
83325860
83326010
83327150
83327160
Title
Reference Card (summarizes status codes and
diagnostic operation for drives with the SMD
and IPI interfaces)
PA8XX Theory Manual
PA8XX Parts Data Manual (contains listings
of field replaceable parts, manufacturer's
recommended spare parts, and accessories)
PA8Gl/PA8G2/PA8Kl/PA8K2/PA8Nl/PA8N2/PA8W2
User's Manual (contains general description,
operation, installation and checkout
information)
PA8XX Maintenance Manual
PA8XX Diagrams Manual
Reference card (summarizes status codes and
diagnostic operation for drives with the
SCSI interface)
PA8Hl/PA8Ll/PA8Pl/PA8P3 User's Manual
(contains general description, operation,
installation and checkout information)
PA8M2/PA8R2/PA8Y2 User's Manual (contains
general description, operation, installation
and checkout information)
Special Supplement (applies to PA8K2D)
Special supplement (applies to half-rack
mounting kit)
For more information about the interfaces described in this
manual, you can request copies of interface specifications from
your Seagate sales representative. The following specifications
are available:
Specification No. Title
f-6
64712402 SMD-E Interface Specification
64721701 Interface Specification for the MPI small
Computer System Interface (SCSI)
64731600
Interface Specitication for IPI-2
Intelligent Peripheral Interface
83325720 F

~ The following table lists the drives covered by this manual:
Equipment
Data Ca pa-
Number
Interface
city (MB)
sector Length
PA8GlA Single Channel SMD 736
Unspecified
PA8G2A
Dual Channel SMD 736
unspecified
PA8G2C* Dual
Channel SMD 736
Unspecified
PA8G2D
Dual Channel SMD
736
unspecified
PA8HlA STD SCSI (Differential)
736 512
Bytes
PA8HlB STD SCSI
(Single-ended)
736
512
Bytes
PA8HlC STD SCSI
(Differential)
736 256
Bytes
PA8HlD STD SCSI
(Single-ended)
736 256
Bytes
PA8HlE STD SCSI (Differential) 736 512
Bytes
PA8KlA Single Channel SMD 850
unspecified
PA8K2A
Dual Channel SMD 850
unspecified
PA8K2D Dual Channel SMD
850
Unspecified
~
PA8K2E* Dual Channel SMD 850
Unspecified
\ PA8K2F*
Dual Channel SMD 850
unspecified
PA8K2H Dual Channel SMD 850
Unspecified
PA8K2J Dual Channel SMD
850
Unspecified
PA8LlA STD SCSI (Differential)
850
512
Bytes
PA8LlB STD SCSI (Single-ended)
850
512
Bytes
PA8LlC STD SCSI (Differential)
850
256
Bytes
* This drive has an optional voltage converter to permit
operation with a power supply providing fewer output
voltages than the standard supply.
Continued
83325720 E
f-7

Equipment
Interface
Data Capa-
Sector Length
Number
city (MB)
PABLlD STD
SCSI
(Single-ended)
850 256
Bytes
PABLlE
STD SCSI (Differential) 850
512 Bytes
PA8LlK STD
SCSI (Single-ended) 850
512
Bytes
PA8M2A
IPI 850 Std Format
PA8M2B
IPI
850
512 Bytes
PA8M2C
IPI 850 1024 Bytes
PA8M2D
IPI 850 Std Format
PA8NlA Single
Channel SMD
1230
Unspecified
PABNlB Single
Channel SMD 1230
Unspecified
PA8N2A Dual Channel
SMD 1230
unspecified
PA8N2B* Dual Channel
SMD 1230
Unspecified
PABN2C
Dual Channel
SMD 1230
Unspecified
PA8N2D Dual
Channel SMD 1230 Unspecified
PA8N2E
Dual Channel
SMD 1230 Unspecified
PA8N2F
Dual Channel
SMD 1230
Unspecified
PA8N2G
Dual Channel
SMD 1230
Unspecified
PA8PlA
HP SCSI
(Differential) 1230 512
Bytes
PA8PlB
HP SCSI
(Single-ended) 1230 512
Bytes
PA8PlC
HP SCSI
(Differential) 1230 256
Bytes
PA8PlD
HP SCSI
(Single-ended) 1230 256 Bytes
PA8PlE
HP SCSI (Differential)
1230 512
Bytes
PA8PlF
HP SCSI
(Differential) 1230 512 Bytes
PA8PlG
HP SCSI (Differential)
600 256
Bytes
PABPlH
HP SCSI
(Single-ended) 1230 512
Bytes
Continued
f-8
83325720 E

~
\
Equipment
Interface
Data Capa-
Length
Number city
(MB)
Sector
PA8P3A HP
SCSI (Differential) 1230 256
Bytes
PA8P3B HP
SCSI (Differential) 1230
512
Bytes
PA8P3C
HP SCSI
(Differential) 1230 256
Bytes
PA8P3D HP
SCSI (Differential) 600 512
Bytes
PA8R2A !PI
1230 Std Format
PA8R2B IP!
1230 512
Bytes
PA8R2C !PI
1230
1024 Bytes
PA8R2D !PI
1230
288 Bytes
PA8R2E
IP!
1230
2308 Bytes
PA8W2A Dual
Channel SMD 1120 Unspecified
PA8W2B*
Dual Channel SMD 1120 Unspecified
PA8W2C
Dual
Channel SMD 1120
Unspecified
PA8W2D
Dual Channel SMD 1120 Unspecified
PA8Y2A
!PI {2-Head Parallel) 1153
83325720 E
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