PerkinElmer Super Series Installation guide

301462·002
PERKIN-ELMER
Memory Products Division
SUPER SERIES
(SF AND ST)
MAGNETIC DISK
DRIVE
OPERATION AND MAINTENANCE
VOLUME 1

Pr8nted In U.S.A.
PERKIN-ELMER
Memory Products Division
SUPER SERIES
(SF AND ST)
MAGNETIC DISK DRIVE
OPERATION AND MAINTENANCE
VOLUME 1

Revision
Letter
Prelim.
A
Super Series Disk Drive
Manual 301462
Revision Level
Description
Released to cover 1500 and 2400 rpm, 2200 BPI machines only. Though
listed in Appendix B Index, Dwgs. 301422 (Data Control - MFM), 301632
(DCB), 301650 (Spindle Drive Limiter PWB and Schematic), and 301653
(High Impedance Spindle Switch PWB) were not available for inclusion in the
manual.
Though listed in Appendix C Index, Schematics 301691 (I nterconnection
Diagram), 301423 (Data Control - MFM), 301633 (DCB), 301637 (EIB),
301654 (High Impedance Spindle Switch), and 301063 (I/O Connector-·
D31/33) were not available for inclusion in the manual.
The manual was written to cover high-impedance DC spindle drive motors;
therefore, an Addendum was included to cover early produced units with
low impedance motors.
Though position, number, and title were indicated, photographs for the fol-
lowing illustrations were not available.
Figure
Title
3-3 Series T Cartridge Loading
5-3 Front-Load
with Cover Removed
5-4 Top-Load
with Cover Removed
5-5 Assy.
Identification - Bottom View
5-7 Simplified
Front View
5-10 Power Supply Assy.
Appendix A - A Master Spares List was not available.
This release also covered 1500 and 2400 rpm, 2200 BPI machines only; how-
ever all drawings misssing from Appendix B in the Preliminay Release were
now included except Dwg. 301422, Data Control MFM, which was for 4400
BPI operation.
All schematics missing from Appendix C in the Preliminary Release were
included with the exception of Data Control MFM Schematic 301423.
SECTION 3 - OPERATION
The photograph for Figure 3-3 was included.
SECTION 4 - THEORY OF OPERATION
Major signal lines were added to Figure 4-9 Block Diagram.
Updated Descriptions and new simplified diagrams were added to the DCB
writeup under para. 4.5, Logic Board Circuit Analysis. Other new paragraphs
were also added under para. 4.5 explaining Speed Dection and AC/DC loss
Recovery logic. Minor errors in technical writeups were corrected.
ii
Date
4/76
5/76

Revision
B
SUPER SERIES DISK DRIVE
MANUAL 301462
REVISION LEVE L
RECORD OF REVISIONS
Description
SECTION 5 - MAINTENANCE
Photographs and art work necessary to complete 5-3, 5-4, 5-5,
5-7, and 5-10 were included.
Under paragraph 5.5,
ADJUSTMENT AND CALIBRATION
PROCEDURES, a CAUTION for Adjustment of the SVA with P15
removed was added.
Appendix A - A Master Spares List was not available.
This release constituted
the full release of the Super Series manual and
included all
information necessary for 4400 BPI operation. Dwg.
301422 for the Data Control - MFM PWB was not available for
Appendix B, but its schematic, Dwg. 301423 was added to Appendix C
SECTION
2-
Figure 2-1 was changed to coordinate with newly created Table 2-1 in
order
to provide the user with more information on unpacking or
reshipping machines.
SECTION 4-
Writeups were added as required to cover the Data Control MFM PWB
which also required two new illustrations: one for Read; one for Write.
SECTION 5-
Writeups were added as required to cover the Data Control MFM PWB
which also revised Detent Waveform Figures 5-33 and 5-34.
Throughout Section 5, grid coordinates were added to test point
references as an assist for technicians in the field. Table 5-2 was
expanded to include new accessories and maintenance aids.
A
CAUTION was added against removing Positioner head load cams or
the head mounting block during removal and replacement. The
CAUTION was also applied to the Positioner illustration on the IPB.
The SVA Adjustment procedure was completely revised and rewritten
for the field to reflect improved procedures developed for the lab by
Perkin-Elmer Engineering (paragraphs 5.5.5 through 5.5.8).
SECTION 6-
This section was completely revised and reprepared.
APPEND IX A - Master Spares List completed and included.
iii
Date
7/76

Revision
Letter
C
SUPER SERIES DISKDRIVE
MANUAL 301462
REVISION
LEVEL
Description
SECTION 1 - GENERAL DESCRIPTION
Revised Write Protect and Write I nhibit Circuitry descriptions (para. 1.1.1).
SECTION 4 - THEORY OF OPERATION
Updated Safety Features (para. 4.3.2).
SECTION 5 - MAINTENANCE
Revised SVA Adjustment procedure and Operational Checks (paras. 5.5.5
and 5.5.6). Added Fine Offset and Access Time Adjustments (paras. 5.5.5.4
and 5.5.5.5). Revised Temp. Compensation Check* (para. 5.5.7) and added
Ready Inhibit Check (para. 5.5.8). Changed VCO Clock to 10.5 MHz on
MFM PWB (5.5.13.1).
Figure 5-32: Added Thermistor callout. Added new Figures 5-33 and 5-34
for 100 and 200 TPI Detent waveforms. Added Figure 5-35, Fine Offset
Adjustment.
* Chart
of Figure 5-36, Temp. Compensation Voltage Chart, deleted. Data
now in new Table 5-4.
APPENDIX B - ENGINEERING DWGS. AND MATL. LISTS
Updated Dwgs.: 400000, Disk Drive, 100/200 TPI ST (A -B); 301457,
Detent Amplifier PWB (B -C); 301483, SVA (E -G); 301636, EIB (A - B)
301650, Spindle Drive Limiter PWB and Schematic (A -B); 301206,
DEB (D -F); 301632, DCB (C -E), and 301047, Line Terminator PWB,
031/33 Female (A -B). Dwg. for MFM PWB (301422A) added.
All drawings re-indexed to numerical order, and dash versions of material
lists added for: CIB (301174), DEB (301206),
I/O Connector PWB (301291),
DIB (VFO 301321), DCB (301633), and MFM PWB (301422).
APPENDIX C - SCHEMATICS
Updated Dwgs: 301458, Detent Amplifier (A -B); 301484, SVA (D -F);
301637, EIB (A -B); 301207, DEB (D -E), and 301633, DCB (B -D).
APPENDIX D - IPB
Figure D-11 (P. D-29): Item 46 added to callouts. Page D-31, Item 42,
quantity changed from
31 to 29.
iv
Date
9/76

Revision
Letter
D
SUPER SERIES DISK DRIVE
MANUAL 301462
REVISION
LEVEL
Description
Revision D constitutes a major revision
of the SF-ST manual due to
Engineering redesign which replaced four PWB's and modified the
MFM
PWB as described under Appendices Band C below. This manual,
which incorporates these
changes, has been reassigned the dash
number -002. All data pertinent to the four replaced PWB's and
presented in Revisions A, B, and C of this manual, has been assigned
dash number -001 and is contained in Appendix E.
Section 2: Figure 2 and Table 2 - Added shroud.
Paragraphs 2.4.2 through 2.4.7.4 revised and rewritten.
Section 4: Paragraphs 4.5.1.5, 4.5.9.2, 4.5.10, and 4.5.12 rewritten
to accomodatenew PW8's.
Section 5: Paragraph 5.3.6.3: procedure
for screw removal added.
Paragraph 5.5.3 rewritten to accomodate new PWB's.
Section 6: Completely revised to include IC reference data.
Appendix
A: Page A-1: Item 6 changed.
Page A-2: Item 2 Next Assembly changed.
Appendix
B: Commutator PWB 301170 replaced by 301920.
I/O Connector D-40 PWB 301453 replaced by 301936.
Spindle Drive
Limiter +5V Drive PWB 301650 replaced by 301794.
Spindle Switch
PW8 301653 replaced by 301789.
Updated: Disc Drive, ST, 400000 (8-C); Disk Drive, SF,
400001 (8-C); Line Terminator D31/33 Female 301047 (8-C);
Line Terminator D31/33 Male 301055 (8-C); CIB 301174 (8-C);
DEB 301206 (F-G);
I/O 301291 (A-A 1); DIB-VFO 301320 (C-D) ;
PS 301361 (8-C); MFM-DCB 301422 (A-C); SVA 301483 (G-H);
DCB 301632 (E-E1); EI8 301636 (B-E); SLB 301687 (8-C).
Appendix
C: I/O D40 Schematic 301454 replaced by 301937.
Spindle Switch Schematic 301654 replaced by 301790.
Updated: CIB 301175 (C-D); I/O Connector 301292 (A-A1);
Power Supply 301361 (8-C); MFM Data Control-2 301423 (A-B);
SVA 301484 (F-G); DCB 301633 (D-D1); EIB 301637 (8-C).
Appendix D: Figure D-4 Item 14, Home Switch changed.
Page"D-9, Item 14 changed.
Page D-18: Items 15 and 16 changed (figure D-7 callouts
changed
to agree).
Page D-6: Item 11 changed.
Page D-12: Items 2, 3, and 7 changed.
Appendix
E: Added to cover information applicable to four replaced
PW8's (ref. Appendices 8 and C above). Updated:
Commutator
PWB 301170 (8 -C1); Spindle Switch PW8
301653 (A - A1).
v
Date
3/77

Revision
Super Series Disk Drive
Manual 301462
Revision Level
Letter Description
E SECTION 4
F
Paragraph 4.5.13: Added explanation of Emergency Retract PWB modifi-
cation
for 20 megabyte drives (ACN 41877).
SECTION 5
Air filter CAUTION added to pp. 5-17,5-28,5-29, and 5-51 (ACN 4877).
Page 5-70: Dimension in Note changed to "O.020-inch" (ACN 52077).
Pages 5-71 through 5-75 revised and rewritten (ACN 3377).
WARNING added to paras. 5.4.3.16 and 5.5.114 (ACN 41377).
Page 5-80, para. 5.5.13.4: Added 20 megabyte emergency retract check.
Also added Figure 5-44, "Two-speed Emergency Retract" (ACN 41877).
Appendix B: Updated: Disk Drive, ST, 400000 (C-E); Disk Drive, SF,
400001 (C-D);
I/O Connector 031/33,301062 (B-C); C1 B, 301174 (C-C1);
DEB, 301206 (G-H); Power Supply, 301361 (C-D); MFM, 301422 (C-C1);
EIB, 301636 (E-F); SLB, 301687 (C-B); Spindle Switch, 301789 (B-B1);
Spindle Limiter/5V Drive, 301794 (A-B 1) ; Commutator, 301920 (A-B);
and
I/O PWB D40, 301936 (A-B).
Added: Emergency Retract, 302064.
Appendix C: Updated: DEB, 301207 (E-F); Power Supply, 301361 (C-D),
and DCB, 301633 (D1-D2).
Added: Emergency Retract 302065.
Appendix E: Deleted Pages E-29, E-30, E-31, E-32, E-33, and E-34.
Appendix B: Updated: MFM Data Control, 301422 (C1-D);
Servo
Amplifier, 301483 (H-J); Electronics Interconnect, 301636 (F-G);
Commutator Board
PWB and Schematic, 301920 (B1-C1); Emergency
Retract, 302064 (X1-A).
Appendix
C: Updated: MFM Data Control-2, 301423 (B-C); Emergency
Retract, 302065 (X1-A).
vi
Date
6/77
7/77

Revision
Level
G SECTION 4
Super Series DiskDrive
Manual 301462-002
Revision Level
Description
Paragraph 4.6.2, Schematic Designators, deleted. All subsequent paragraphs
renumbered and changed to call/out PWB's by abbreviated names.
SECTION 5
Paragraphs 5.3.3, READ/WRITE HEAD INSPECTION AND CLEANING;
5.3.4, FIXED DISKCLEANING; 5.3.5, CARTRIDGE REMOVAL AND
HAN DLI NG: New recommended head cleaning products added (ACN 8877).
Paragraph 5.5.9, I NDEX ALIGNMENT: Step I revised.
APPENDIX A
Page A-1, Item 3: Changed (ACN 81677).
APPENDIX B: Updated Dwgs: S-T 400000 (E-F); S-F 400001 (D-E); Line
Term D40 Male 301074 (B-C); DEB 301206 (H-J); DCB 301632 (E-G);
EIB 301636 (G-H); Spind. Lim./5V 301794 (B-C); I/O D-40 301936 (B-C).
APPENDIX C: Updated Schematics: DCB 301633 (D-F); I/O D40 (A-B).
APPENDIX D
Page D-15, Item 1 PIN changed. Page D-25, Items 2 and 7: PIN changed.
Page D-26, Figure D-1 0: Items 36, 37, and 40 deleted from Brush Access
Cover hardware. Page D-27, Items 1 and 34: P/N changed; Item 36 and 37:
quantity changed. Page D-28: Item 40 deleted. Page D-30, top item, Assy.,
Fixed OiskCover, Items 11, 17: PIN changed (ACN 81677). Page 0-8, Figure
0-4: Art changed to use WAN-0978-004.
APPENDIX E
Page E-1: WARNI NG and Figure E-1 added following Table E-1.
LOW IMPEDANCE AOOENOUM
Page 4: WARNING and Figure 3 added.
vii
Date
10/77

Revision
Level
Super Series Disk Drive
Manual 301462-002
Revision Level
Description
H SECTION 2
J
K
L
Paragraph 2.4.6: Note added re: head alignment (ACN 11277).
SECTION 5
Paragraph 5.5.4.2: Step H revised (ACN 111277). Paragraphs 5.4.3.4
and
5.4.2.5 revised (ACN 91477).
APPENDIX B
Updated Spindle Switch PWB 301789 (B1-C).
APPENDIX C
Updated DIB 301321 (B-C).
Pages renumbered.
APPENDIX D
Page D··21: Item 3 changed; Item 4 added.
Page 0-22: Item 51 changed.
Page D-27: Item 5 changed; Item 6 added. Item 19 changed.
Page 0-30: Item 17 changed.
SECTION 2
Revised: Paragraphs 2.3, 2.4.7.2,2.4.7.3
and 2.4.7.4 (ACN 11778).
SECTION 4
Revised:
Page 4-8, last paragraph, and paragraph 4.5.3.4.4.
SECTION 5
Revised: Paragraph 5.5.5.2
and 5.5.5.5. Added new Figure 5-36 (ACN 1478).
APPENDIX B
Updated: Disk Drive ST, 400000 (F-G); Disk Drive SF, 400001 (E-F);
CIB 301174 (C-D); PS 301361 (D-E), SVA 301483(L-M).
APPENDIX C
Updated: CIB 301175 (D-E);
PS 301361 (D-E), SVA 301484 (J-K).
APPENDIX D (lPB), E (-001 Data), and the Low ImpedanceAddendum
deleted from manual. To be supplied on request.
SECTION 5
Paragraph 5.5.5.5:
Change step B and Figure 5-36 (ACN 32478).
SECTION 6
Deleted. To
be supplied on request.
APPENDIX B
Updated: DiskDrive ST, 400000(G-H); Disk'Drive SF,400001(F-G); DIB
(VFO), 301320(D-E); PS, 301631(E-G); SVA, 301483(L-M); EIB, 301636
{H-J);Spindle Switch, 301789 (C-D);Spindle Limiter, 301794 (C-D);
APPENDIX C
Updated: DIB (VFO); 301321
(C-D); PS, 301361 (E-G); DCB,301633
(F-G);EIB,301637(C-D)
viii
Date
12/77
2/78
5/78
6/78

Revision
Level
M SECTION 1
Super Series Disk Drive
Manual 301462-002
Revision Level
Description
Changed: Table 1-1, 100 TPI track-to-track access time to 10 msec.
Revised: Paragraph 1.3.2.
SECTION 2
Revised: Figure 2-1; Table 2-2 Input Line column
SECTION 5
Page 5-51, para. 5.5.4.2, Step H: 600 mV changed to 800 mV.
Page 5-83: para. 5.5.14, CIB Adjustment added (ACN 8478).
APPENDIX A
Master Spares List, p. A-1, Item 1, Mag. Rec. Hd. for 4400 BPI R!W:
301401-001 and -002 changed to 301489-005 and -006.
APPENDIX B
Updated: Disk Drive, 100/200 TPI, ST, 400000 (G-L); DiskDrive,
100/200 TPI, SF, 400001 (F-K); Control Interface PWB, 301174
(D-E); Data Electronics PWB, 301206 (J-K); Servo Amplifier PWB,
301483 (M-N); Electronic Interconnect PWB, 301636 (J-K); Spindle
Drive Limiter/5V Drive PWB, 301794 (D-E); I/O Connector D40,
301936 (C-D 1).
APPENDIX C
Updated: Control Interface PWB, 301175 (E-F); MFM Data Control-2,
301423 (C-D); Detent Amplifier, 301458 (B-C); Servo Amplifier,
301484 (J-L); Servo Logic PWB, 301688 (A-B); I/O PWB -D40,
301937 (C-D).
ix
Date
9/78

Revision
Level
N
P
a
SECTION 1
Super Series DiskDrive
Manual 301462-002
Revision Level
Description
Changed: Table
1-1 access times.
SECTION 2
Changed: Table
2-2 (ACN 11 '178).
SECTION 4
Figure 4-5
revised (ACN 11178). Figure 4-24 revised.
SECTION 5
Revised:
paras. 5.5.5.1 (Step G); 5.5.5.2; 5.5.5.5 (Step A). Figure
5-31
revised.
APPENDIX B
Updated: Disk Dr. 100/200 TPI, ST, 400000 (L-N); Disk Dr. 100/200
TPI, SF, 400001 (K-M);Spind. Sw. 301789 (D-E).
APPENDIX C
Updated: Det. Amp. 301458 (C-DL
APPENDIX B
Added:
PWB I/O Connector W/lnterrupt Option, 301947 (A);
Assy, Piggyback 1/0 Connector W/lnterrupt Option, 301952 (C).
APPENDIX C
Added:
I/O Connector WIInterrupt Option, 301948 (A);
Piggyback--I/O Connector With Interrupt Option, 301953 (A).
Revised manual for two-volume split. Volume 1 contains all text and associated
art in five sections. Volume 2 contains logic schematics, PWB assembly drawings
and material lists, and a Master Spare Parts List.
SECTION 1
Revised completely.
SECTION 3
Added: Paragraph 3.4 and Figures 3-6 through 3-12 (flow charts)
SECTION 5 (ACN 22279)
Page 5-55, paragraph 5.5.5.1, step H: Revised
Page 5-60, CAUTION, line 4, changed: POSITIVE-GROUND to POSITIVE-GOING
Page 5-62, paragraph 5.5.5.4: Updated.
Page 5-62, Added: New Figure 5-35; incremented subsequent figures by one.
Page 5-63, paragraph 5.5.5.5, steps Band C: Updated.
Page 5-64, Figure 5-37 (was 5-36): Updated variation callouts.
x
Date
12/78
2/79
6/79

RECORD OF REVISIONS
Revision Description Date
R SECTION 5 (ACN 71279)
11/79
Revised: Page 5-79, paragraph 5.5.13.1
Revised:
Page 5-80, Figure 5-43
xi

TABLE OF CONTENTS
Section Paragraph
Page
GENERAL DESCRIPTION
1. 1 SCOP E ..... ; .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 INTRODUCTION. . . . . . . . . . . . . .. . . . .. . . . . . . .. . . . . . . . . . .. . 1-1
1.2.1 Special Fea-tures .................. " . . . . . . . . . . . . . . . . . . . . .. 1-1
1.3 SPECIFICATIONS. . . . . . . .. . . .. . . . . .. .. . . . . . . . . . . . . . . .. . . 1-3
1.4
ARRANGEMENT AND FUNCTION OF MAJOR ASSEMBLIES. . .. 1-3
1.4.1 Operator Controls
and Status Indicators. . . . . . . . . . . . . . . . . . . . . . . 1-5
1.4.2 Door Assembly
.................................. '.' . . . . . . 1-5
1.4.3 Cartridge Receiver Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.4.4 Spindle Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.4.5 Head-Positioner Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6
1.4.6 Electronic Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.4.7 RearPaneIAssembly ............... " ...................... 1-7
1.5 FORCED-AIR CLEANING SYSTEM. . .. . . . . . . . . . . . . . .. . .. . . . 1-7
2 INSTALLATION AND CHECKOUT
2.1 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 UNPACKING AND INSPECTION. . . . . . .. . . . . . . . . . . . . .. . . . . . 2-1
2.3 CARRIAGE SHIPPING RESTRAINT REMOVAL. . .. . . . . . . .. . . . 2-1
2.4 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .. 2-3
2.4.1
Input Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.4.2 Interface Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.4.3 Electrical Characteristics. . . . . . . . . .
.. . . . . . . . . . . . . . . . . . . . . . . . 2-9
2.4.4 Input Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2.4.5
Output Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.4.6 Rack-Mounted Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.4.7 Initial
Checkout. . . . .. . .. . . . . .. . . .. . . . .. . . . . . .. . .• . . . . . . 2-14
3 OPERATION
3.1 SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-1
3.2 OPERATOR CONTROL PANEL. . . .... . . . .. . . .. . .. . . . .. . . . . 3-1
3.2.1 Functions of Operator Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 CARTRIDGE
LOADING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.3.1
SF Disk Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 3-3
3.3.2 ST Disk
Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3.3.3 Operating the Disk Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 3-8
3.3.4 Timing. . . . . . . . . . . . .
.. . . . . . . . . . . .. . . . . . . . .. . . . .. . . . . . .. 3-10
3.3.5 Temperature Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3.4 FLOW CHARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
4 THEORY OF OPERATION
4.2 INTRODUCTION.. . . . . . . . . .. . . . . . . . .. . . . . . . . . . . .. . . . . . . . 4-1
4.3 SC.OPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-1
4.3 MECHANICAL DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-1
4.3.1 Spindle/Drive Motor Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.3.2 Positioning Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.4 SYSTEM ELECTRONIC THEORY. .
.. . .. .. . .. .. .. . . . . . . .. . . 4-11
4.4.1 Functional Block Diagram Description. . . . . . . . . . . . . . . . . . . . . .. 4-11
4.5 LOGIC BOARD CIRCUIT ANALYSIS. . . . .. . . ... .. . . . .. . .. . . 4-17
4.5.1
I/O Connector Board (lOB). .. . .. . . . .. .. . ... .. . . . .. . .. . . . .. 4-17
4.5.2 Electronics Interconnect Board (EIB)
... : . . . . . . . . . . . . . . . . . . . . 4-20
xii

Section
4
TABLE OF CONTENTS (continued)
Paragraph
Page
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
4.5.10
4.5.11
4.5.12
4.5.13
4.6
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
DiskControl Board (DCB). . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-20
Servo Logic Board (SLB). . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-27
Servo Amplifier Board (SVA). . . . . . . . . . . . . . . . . . .. ....... 4-32
Data Electronics Board (DEB). . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-37
Control Interface Board (CIS). . . . . . . . . . . . . . . . . . . . . . . . . .. 4-43
Data Interface Board VFO II (DIB)
........................ 4-45
Modified Frequency Modulation (MFM) Board. . . . . . . . . . . •
.. 4-50
Spindle Drive Limiter Board. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-53
Motor Drive Power Switch Board. . . . . . . . . . . . . . . . . . . . . . . .. 4-53
Commutator Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-54
Emergency Retract Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-55
SCHEMATIC DIAGRAM ANALySiS ..................... 4-55
Scope of Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-55
Initial Seek Operation .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-56
Program med Seek ........................... . . . . . . . .. 4-61
Restore Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-61
ReadlWrite Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-64
5
MAINTENANCE
5.1 INTRODUCTION. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. 5-1
5.2 SCOPE OF MAINTENANCE. . . . . . . . . . . . . . . . .. . . . . . . . . . . 5-1
5.3 PREVENTIVE MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . .. 5-3
5.3.1 Preventive Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . .
.. 5-3
5.3.2 ReadlWrite
Head Inspection and Cleaning. . . . . . . . . . . . . . . . .. 5·4
5.3.3 Fixed DiskCleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-5
5.3.4 Cartridge Removal
and Handling. . . . . . . .. . . . . . . . . . . . . . . . .. 5-5
5.3.5 DiskDrive Top Cover Removal. . . . . . . . . . . . .
.. . . . . . . . . . . .. 5-7
5.4 CORRECTIVE
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . .. 5-7
5.4.1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-7
5.4.2 Removal and Replacement of Major Assemblies. . . . . . . . . . . . .. 5-16
5.4.3 Removal
and Replacement of Subassemblies. . . . . . . . . . . . . . .. 5-27
5.5 ADJUSTMENT
AND CALIBRATION PROCEDURES. . . . . . .. 5-45
5.5.1 Table
of Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-45
5.5.2 Power Supply Adjustment. . . . . . . . . . . . . .
.. .............. 5-46
5.5.3 Spindle Phasing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
... 5-47
5.5.4 Index/Sector Transducer Adjustment. . . . . . . . . . . . . . . . . . . .
.. 5-47
5.5.5
SVA Adjustment Procedures. . . . .. . . . . . . . . . . . . . . . . . . . . . .. 5-54
5.5.6 SVA Operational Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-65
5.5.7 Temperature Compensation Check. . .
.. . . . . . . . . . . . . . . . . . .. 5-66
5.5.8 Ready
Inhibit Check. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-68
5.5.9 Index Alignment.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-69
5.5.10 Write Current Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-71
5.5.11 Read/Write Head AIignment. . . . . . . . . . . . . . .. . ....... ; .... 5-73
5.5.12 Data Separator Operational Check. . . . . . . . . . . . . . . . . . . . . .
.. 5-78
5.5.13 MFM Adjustments (4400
BPI Disk Drives Only). . . . . . . . . . . . .. 5-79
5.6
TROUBLESHOOTING. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .. 5-83
xiii

Figure
2-1
2-2
2-3
2-4
2-5
2-6
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10 .
3-11
3-12
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4~11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
.4-30
4-31
4-32
4-33
4-34
LIST OF ILLUSTRATIONS
Title
Page
Frontispiece, Super Series Magnetic Disk Drives ......................... xviii
Shipping Container and Parts ..................................... 2-2
Carriage Shipping Restraint
....................................... 2-4
Multiple Disk Drive Installation (Daisy Chaining) ...................... 2-6
Rear Panel and
I/O Connector Board ............................... 2-8
Rack-Mounted Installation Instructions
............................. 2-13
By-Passing
Top Cover I nterlock Switch .............................. 2-15
Operator Controls
.............................................. 3-1
Series F Disk Drive Cartridge Loading ............................... 3-4
Series T Disk Drive Cartridge Loading ............................... 3-5
Operating the SF
or ST Disk Drive ................................. 3-6
Power
ON/Off Sequence ......................................... 3-10
Power-up and Cartridge Loading (Load Mode) ....................... 3-11 I
Run Mode - I nitial Cycle ....................................... 3-12
Run Mode -
Cylinder 000 Seek .................................. 3-13
Run Mode -New Address Seek
.................................. 3-14
Run Mode -
Write Operation .................................... 3-15
Run Mode -
Read Operation .................................... 3-16
Turn-off Cycle ................................................ 3-17
Simplified Block Diagram ........................................ 4-2
Spindle/Drive Motor Assembly ................................... .4-3
Three Types
of Sector Rings ..................................... .4-5
Positioner Assembly
........................................... .4-6
Optical Transducer Diagram ..................................... .4-7
Movable Optical Glass
........................................... 4-7
ReadIWrite Heads .............................................. 4-9
Head Unloading Mechanism
..................................... .4-10
Block Diagram -Super Series (major signal lines) ..................... .4-13
Block Diagram -Super Series (major signal lines) 4400 BPI only ......... 4-14
Functional
Block Diagram -Head Positioning System ................. 4-15
Functional
Block Diagram -Read/Write Circuit ...................... 4-16
Block Diagram - I/O Board ..................................... 4-18
Spindle Motor Speed Detection and Control Functional Block Diagram. . .. 4-21
Spindle Motor Control Simplified Logic Diagram. . . . . . . . . . . . . . . . . . . .. 4-21
Motor Speed Control Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-22
Removable Disk Index/Sector
Separation. . . . . . . . . . . . . . . . . . . . . . . . . .. 4-24
Removable I
DX/STR Pulse Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . .. 4-24
Disk
Control Signals - Simplified Logic Diagram. . . . . . . . . . . . . . . . . . . .. 4-25
Block Diagram
of Servo Logic Board (SLB) ......................... 4-28
Subtractor Circuit - 200 TPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-30
Illegal Address Gating Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-31
Block Diagram of Servo Amplifier Board (SVA) . . . . . . . . . . . . . . . . . . . . .. 4-33
New Address Seek Operation Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-36
Positioner Servo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 4-37
alock Diagram of Data Electronics Board (DEB) ............. ,....... 4-38
Disk/Head Selection Decoder
............. , . . . . . . . . . . . . . . . . . . . . .. 4-39
Block Diagram
of ReadIWrite Amplifier .......... , ... , , ...... , .. , ,. 4-40
ReadlWrite Signals -Relative
Timing ........................... , .. 4-41
Edge Erasing
...... , ... , ..... , .... , ... , ...... , , ........... , . .. 4-42
Block Diagram of CI B ........ , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-44
Current Sector
Identification (CIB) ................................ 4-46
Output of Double-Edge Discriminator. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-47
Data Interface and
VFO Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . .. 4-48
xiv

Figure
4-35
4-36
4-37
4-38
4-39
4-40
4-41
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-17
5-18
5-19
5-20
5-21
5-22
5-23
5-24
5-25
5-26
5-27
5-28
5-29
5-30
5-31
5-32
. 5-33
5-34
5-35
5-36
5-37
5-38
5-39
5-40
5-41
5-42
5-43
5-44
5-45
5-46
LIST OF I LLUSTRATIONS (continued)
Title
Page
Double-Frequency-Modulated \/Vaveshape . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-49
Simplified Logic Diagram - Read Circuitry ......................... 4-51
Simplified Logic Diagram -Write r.ircuitry . . . . . . . . . . . . . . . . . . . . . . . .. 4-52
Simplified Diagram of Brushless Motor Circuit ....................... 4-54
Head Load Timing Diagram ...................................... 4-59
Programmed Seek (1 and 2 Cylinder Seeks) ......................... 4-62
Timing Diagram of Restore Operation .............................. 4-63
Fixed Disk Cleaning Hole Location ................................. 5-6
Cartri.dge Interlock Switch Actuation -ST ........................... 5-6
SF Wit" Cover Removed ......................................... 5-8
ST with Cover Removed ......................................... 5-9
SF and ST Disk Drives Assembly Identification - Bottom View .......... 5-10
Series F DiskDrive -Simplified Front View .......................... 5-11
Series T DiskDrive -Simplified Front View .......................... 5-12
Removal/Replacement Guide -Major Assemblies ..................... 5-17
Top Cover Hole Alignment ....................................... 5-18
Power Supply Assembly ......................................... 5-19
Positioner Assembly ............................................ 5-21
Spindle Assembly .............................................. 5-25
Disk Brush Drive Mechanism ...................................... 5-27
Removal/Replacement Guide -Subassembl ies ........................ 5-28
Air Filter Installation ........................................... 5-30
Blower Shaft Ground Brush -Mounting ............................. 5-33
Spindle Shaft Ground Brush -Mounting ............................ 5-34
Disk Cleaning Brushes - Installation/Replacement Guide .......... , ..... 5-34
Cartridge Interlock Switch Assembly ............................... 5-35
Removable Index/Sector Transducer -Series F Only ................... 5-37
Fixed and Removable Index/Sector Transducer ....................... 5-38
Read/Write Head Assembly ....................................... 5-40
Torque Wrench No. T-00425 Application ............................ 5-42
Emergency Retract PWB Assembly ................................. 5-44
Power Supply Connections - Commutator Board Phasing Adjustment ...... 5-48
Shutter Adjustment - Commutator Board ........................... 5-49
Cartridge Sector/Index Transducer VVaveshape ........................ 5-50
Fixed Disk Sector/Index Transducer Waveshape ....................... 5-52
Input to Differentiator Board (SF) .... " ............................ 5-53
Detent Signal Output Waveform (manual) ............................ 5-56
Phasing Adjustment VVaveform .................................... 5-56
Optical Detent Assembly -Phasing Adjustment ....................... 5-58
100 TPI Drive -Detent Waveform -Alternate One Track Seek ........... 5-61
200 TPI Drive -Detent VVaveform - Incrementing One Track Seek ........ 5-61
Fine Balance Adjustment ....................•.....•.....•....... 5-62
Fine Offset Adjustment ................•.........•.............•. 5-63
Detent Signal Output Waveforms ................••...............• 5-64
Index-to-Data Alignment (2400 rpm shown) ............•....•......•. 5-70
Write CurrentWaveform -Track 000 .........................•..... 5-72
Write Current Waveform -Innermost Track ........................•. 5-72
Read/Write Head Alignment Waveforms (Removable Disk) ............... 5-74
Data Separator Output Waveform ................•..........•.•.... 5-79
MFM Timing Relationships Diagram .........•................•...•• 5-80
Timing Relationship Between MFM DATA and CLOCK for Error
Checking with an Exerciser ...........................•.....•....• 5-81
Write Clock to Data Timing Adjustment ...........•................. 5-82
Two-speed Emergency Retract ................................... ·5-83

Table
1-1
2-1
2-2
2-3
2-4
4-1
5-1
5-2
5-3
5-4
5-5
5-6
LIST OF TABLES
Title
Page
Specifications -Super Series Disk Drives ........................ 1-4
Packaging Container Parts
....................... _ ............ 2-3
Interface Pin Assignments .................................... 2-5
Printed Wiring Board Acronyms ............................... 2-6
Glossary of Mnemonic Terms ................................. 2-7
Normal Run Switching Sequence .............................. 4-55
Preventive Maintenance Schedule .............................. 5-2
Standard and Special Accessories and Service Aids ................. 5-14
Table
of Adjustments ....................................... 5-46
Temperature Compensation Voltage
........................... ,5-68
CE Cartridge Head Alignment Tracks ........................... 5-75
Fault Isolation Chart ........................................ 5-84
xvi

Front Load -Series SF
Top Load -Series ST
Frontispiece - Super Series Magnetic Disk Drives

SECTION 1
GENERAL DESCRIPTION
1.1 SCOPE
This manual describes operation and maintenance of Super Series Disk Drives manufactured by
Perkin-Elmer Memory Products Division, and is divided into two volumes. Volume 1 contains the
following five sections:
Section 1
Section 2
Section 3
Section 4
Section 5
General Description
Installation and Checkout
Operation
Theory
of Operation
Maintenance
Volume 2 contains the
following three sections:
Section 1
Section 2
Section 3
Logic Schematics
Assembly Drawings
Master Spare Parts List
1.2
INTRODUCTION
Super Series Disk Drives are front-loading (SF) or top-loading (ST), 100 or 200 tracks-per-inch
(TPI) (tracks per 2.54 cm), random-access, high-capacity data storage devices whose compact size,
-optimum performance, and reliability make them exceptionally suitable for use in computer sys-
tems of small and medium size. Several models are available in each series with a choice in storage
capacities and transfer rates.
In standard versions the units incorporate, in either series, an integral permanent disk and a remov-
able disk
of the cartridge-type offering a gross storage capacity of up to 200 megabits. Recording
density
is 2200 or 4400 bits per inch (BPI) (bits per 2.54 cm).
NOTE
Throughout th is manual all references to tracks
per inch (TPI)
or bits per inch (BPI) are intend-
ed to relate to tracks per 2.54 centimeters (cm)
or bits per 2.54 centimeters (cm).
1-1