MAINTENANCE AIDS WIRE LISTS

CONTROL DATA®

DISK STORAGE UNIT

BR2A5

DIAGRAMS

MAINTENANCE AIDS WIRE LISTS

CONTROL DATA

CO R P0 RAT I ON

CUSTOMER ENGINEERING MANUAL

REVISION RECORD (CONT’D)

REVISION DESCRIPTION

J Incorporates Engineering Change Orders FF29573, FF29907, PE29967, and Field Change Order PE29573 (4..472) affecting pages ii.i, 111, iv, viii, ix, x, 5—26, 5..36, 5—42.1, 5—86, 5_94, 7—78, 7—79, 7—80, 7—81,

7—82, 7—83,_7—84,_7—85,_7—86,_7—88,_7—89,_9—7,_9—16,_9—23.

K Incorporates Field Change Order FF29923 affecting pages 11.1, iii, iv, 9—42.

(4_12_72)

L Incorporates Engineering Change Orders PE29921, FF29922, PE31007, and Field Change Order PE29922 (6_272) affecting pages ii.i, iii, iv, viii, 5—23, 5..28.1, 5—34, 5—35, 5—36, 5_lOl, 5—102, 9—6, 9—3é, 9_37,

9—38, 9_39, 9—1+0, 9-41, 9—42, 9_43.

N Incorporates Engineering Change Orders PE31014, FE31047, FF31081 affecting pages ii.i, iii, iv, ix, (6—30—72) 5-29, 5—42.3, 9—48, 9_49, 9—50, 9_51, 9—52, 9_53, ^9_54, 9_55, ^956.

Incorporates Engineering Change Orders FF31133, FF31138, PE31160, FF31164, FF31272, FF31317, and (2—10—73) Technical Corrections affecting pages ii.i, iii, iv, ix, 5_34, 5—35,9—23, 9—24, 9—27, 9—31,

9—56, 9—57.

P Incorporates Engineering Change Orders FF31344, FF31389, FF31421 affecting pages ii.i, iii, iv, (7_17_73) vii, 5—21, 5_26, 5_42.1, 5—42.3, 5—42.4, 5—42.5, 5_42.6, 9—11, 9—27, 9—51, 9—52, 9—53, ^9_54.

R Incorporates Engineering Change Orders PE31344C, FF31472 and Field Change Order FF31472 affecting (8—17—73) pages 11.1, iii, iv, vii, 5—28.1, 5—36, 5-42.5, 5—52, 5—53, 5—54, 9—52.

S Incorporates Engineering Change Order FF31401 affecting pages ii.i, iii, iv, iv.i, viii, 5-35, ^5_36, (10_19_73) 5—103, 5—104, 5—105.

T Incorporates Engineering Change Orders FF31497, PE31499A, FF31512, FF31561, and Field Change Order (12_1O_73) PE31519 affecting pages ii.i, iii, iv, iv.i, 516, 5—21, 5—23, 5—27, 5—28.1, 5—29, 5_30.1, 5_37,

5—38, 5—38.1, 5—42.1, 5—42.4, 5—42.5, 7—86.

U Incorporates Engineering Change Order/Field Change Order PE31494 and Technical Corrections affecting (2—28—74) pages ii.i, iii, iv, iv.i, vii, ix, 5—40, 5—42, 542.1, 5—42.4, 5-106, 5-107, 958.

V Incorporates Engineering Change Orders PE31656, FF31691 affecting pages ii.i, iii, iv, iv.i, vii, (5_17_’4) ix, 5—36, 5—52, 5-53, 5_54, 9..5Lf, 9..58.

w Incorporates Engineer:ing Change Order PE31739 affectingpages ii. 1, 111. 5-29, 5-30, 5-30.1, (8_16_?4) 5—35k 5—37,.42, 3. ⁱV. I;

Publication No.

7O6ie7OO

70614700 W ii.i

PUBLICATION NO.

PUBLICATION TITLE

MANUAL STATUS CHECK SHEET 70614700 Sheet 1 of 3

BR2A5 Diagrams and Tre Lists Manual

REVISION

PAGE NUMBER REV

Front Cover ^— Title Page ^—

ii H

ii.i

w

iii

w

iv

iv.i W

1L_________ ^A

vii V

viii S

ix V

x J

Sec 1,2,3,4 Section

5

5i B

5-2 A

5-3

5-4 A

5—5

5-6 A

5-7 A

5-8 A

5-9 A

5-10 A

5—11 A

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5—13 A

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PAGE NUMBER REV

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5—29 5—30 5—30.1

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-1

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Section 6 ^—

70614700

w

PUBLICATION NO.

PUBLICATION TITLE

MANUAL STATUS CHECK SHEET 70614700 Sheet

3

3

BRZA5 Diagrams and Wire Lists Manual

REVISION

PAGE NUMBER REV PAGE NUMBER REV

9-43 L

9.444 C

945

9—46

9—47 E

9-48 M

9-49

9—50 M

9—51 P

9—52 R

9—53 P

9-54

9-55 ^M

9—56 N

9—57 ^N

9—58 V

Section 10 ^— Cmt Sheet ^-

Ret Env ^—

Back Cover ^—

70614700 w ^iv

I

PREFACE

Customer engineering material for the CONTROL DATA® BR2A5 Disk Storage Unit is contained in three separate manuals, which provide all information needed to install, operate, and maintain the unit:

Publication No. 70614600 General Description, Operation, Installation and Checkout, Theory of Operation, Maintenance

Publication No. 70614700 Diagrams, Maintenance Aids, Wire Lists

Publication No. 70614800 Illustrated Parts List

70614700 A v

CONTENTS

5. DIAGRAMS Introduction

Key to Logic Symbols, Part 1 Key to Logic Symbols, Part 2 Receivers

Transmitters Device Addressing Function Steering Command Steering

Head Encode and Head Registers

Head Decode 5-21

R/W Enable, Fault Detection and Register

Access Control

O

Index/Sector, Speed Detection, and Indicators

Voice Coil Positioner Servo Circuit Track Servo Preamp, Cylinder and EOT Detection, and Fine Position Analog

Series Code 09 and Below Series Code 10 and Above Head Gating and Read Write DSU Control Interface

Series Code 09 and Below Series Code 10 and Above DSB 1

DSB2

Status Output Steering Output Control, Part 1 Output Control, Part 2 Chassis Map

Signal Distribution

Logic Chassis Maint enance Panel 5-1 Control Panel

Power Supply

Part 1 (Series Code 01-07) Part 2 (Series Code 01-07) Part 1 (Series Code 08-09) Part 1 (Series Code 10-16) Part 2 (Series Code 08-09) Part 2 (Series Code 10 and

Above)

Part 3 (Series Code 17 and Above)

Schematic Diagrams

OAFN Head Select, Preamp 1AYN Write Erase Circuits 9 FQN Analog Gate and Amplifier OFZN Track Servo Preamp

1FZN Track Servo Preamp 4AWV Track Servo

OCAV Voltage Checking

1CFV/ACFV Track Servo Control OCGV/ACGV Analog, SW, Offset V Gen, Track Servo

1CKV Read/Write Tester Card OCPV Read Recovery

OCSV D/A Converter OCTV Vel and Desired Vel Function

BCUV Coarse ^- Fine, Sum Amp and On Cylinder OCVV Power Ampi Preamp DCWV Access Control OCYV Head Decoder OPAV Lamp Driver 5-13

5-14 5-15 5-16 5-17 5-18 5-19 5-20

5-38 5-39 5-40 5-41 5-42 5-42.1 5-42.2 5-42.3 Part 1 (Series Code 17 and

Above) 5-42.4

5-22 5-23 5-25 5-26 5-27

5-28 5-28. 1 5-29 5-30 5-30. 1 5-31 5-32 5-33 5-34 5-35 5-36 5-37

5—42.5

5—42.6 5-45 5-48 5-50 5-10 6 5-52 5-55 5-56 5-58 5-59 5-61 5-64 5-66 5-68 5-70 5-71 5-74 5-76 70614700 V

vii

Filter ^- SCB Delay ^- IXBD Delay ^- UC_

Delay ^- UEA And ^- VAB

And/Or (Single Input) -VAC/VJW Power Driver ^- VJK

Power Driver ^- VJL And ^- VJM

Or ^- VJN AND ^- VJP

Power Driver ^- VJR Or ^- VJS

Or-VJT

And ^- VJU,VJV And/OR ^- VJW Flip-Flop ^- WBB

Toggle Flip-Flop ^- WBC Single Shot ^- XAA

Single Shot ^- XAB

Gated Single Shot ^- XAC

Head

and

FIGURE S

Head Replacement Criteria Disk Pack Replacement Criteria

Disk Pack Runout Check Access Tester Card

Read/Write Tester Card

9. WIRE LISTS

Description of Wire Lists Logic Wire List.

Control Panel Maintenance Panel Blower Assembly Final I

W4 Harness Assembly W7 Cable Assembly Power Supply

Series Code 13 & Below Series Code 14 & Above Power Distribution, 50 Hz Power Distribution, 60 Hz Preamp Chassis

Power On/First Seek Timing Direct Seek Sequence

Direct Seek Timing

Return to Zero Seek Sequence Return to Zero Seek Timing Unit or System Power Off Sequence

Power Off Timing Track Pulse Generation Read/Write Timing & Format

5-11 Head Advance Timing 7-1 Logic Card Detail 7-2 Inversion Conventions 7-3 Discrete Component Circuit 7-4 Integrated Circuit

7-5 Wired Functions

7-6 Gated Amplifier ^- FAB 7-7 Current Amplifier-FAD 7-8 Gated Intermediate Level

Amplifier ^- GJA

Gated Analog Clamp-GJB Multiple Gate Analog Clamp Clamp ^- GJC

5-12 7-2 7-4 7-5 7—6 7-8 7-10 7-11 7-12 7-14

7-15 7-54

7-55 7-56 7-56.1 7-57 7-57 7-60 7-61 7-62 7-63 7-64 7-65 7-66 7-66 7-67 7-68 7-68 7-70 7-70 7-73 7-74

7-76

7-76 7-76 7—77 7-79 7-85

9—1 9-4 9-23 9-25 9-27 9-28 9-29 9-33 9—36 9-48 9-55 9-56 9—57

5-1 Power On/First Seek Sequence

5-2 5—3 5-4 5—5 5-6 5-7 5-8 5-9 5-10

5—2 5—3 5-4 5—5 5-6 5-7 5—8 5—9 5-10 5-11

7—9 7-10

70614700 V ix

Information for these sections is included in 3R2.A5 Disk Storage Unit, Pub. No. 70614600.

SECTION 1

GENERAL DESCRIPTION

SECTION 2

OPERATION

SECTION 3

INSTALLATION AND CHECKOUT

SECTION 4

THEORY OF OPERATION

SECTION 5

DIAGRAMS

DIAGRAMS

INTRODUCTION

This section contains diagrams that logically describe the DSU in terms of the functions which the unit performs. Figures 5-1 through 5-12 are flow charts, simplified circuits, and timing diagrams that describe the First Seek function, the Power Off sequence, the Direct Seek (forward and reverse) function, the Return to Zero function, the Read/Write operations, and Head Advance timing. The logic diagrams for the unit are provided on pages 5-14 through 5-36. The DSU signal distribution drawing is located on page 5-37.

Panel (operator and maintenance) schematics are on pages 5-38 and 5-39. The unit power supply schematic for mods 01 through 06 is located on pages 5-41 and 5-42, and for mods 07 and above is located on pages 5-42.1 and 5-42.2. Schematic diagrams for the logic cards are found at the end of the section.

70614700 B 5-1

NOTES:

SEQUENCE RELAY,KI

._J 0

_______________

0

SPINDLE MOTOR

_J

BRUSH MOTOR

SPINDLE SPEED, K5 ^_JPM POSIT lONE R

POWER, K4

_______

10 SEC (APPROX)

SPEED DELAY, 1507

I

J I

I I

80 TRACKS ACCELERATING FROM 0 TO 50 IPS.

A. 50 IPS UNTIL 64 TRACKS TO GO.

B. 32 TRACKS DECELERATING FROM 50 TO 25 IPS.

C. 31.5 TRACKS WITH VELOCITY DECREASING UNDER CONTROL OF D/A CONVERTER A637 AND DESIRED VELOCITY GENERATOR A631.

D. CARRIAGE MOVES LAST HALF TRACK AND IS HELD STATIONARY BY FINE POSITION ANALOG SIGNAL.

CARRIAGE TURN AROUND AREA.

DIFFERENCE COUNTER IS INCREMENTAL (COUNTS UPWARD ONLY). CONTENT IS ALWAYS THE COMPLEMENT:

CMPLM OF 6:495, CMPLM OF 406: 105, AND CMPLM OF 0:511.

I I

SEEK FF, K500 COUNT INHIBIT,1516 FORWARD

CARRIAGE MOTION

T:4O6 STROBE, Y503_

p

60JSEC- g.m

n

T:4O6 ENABLE, K506.

GATED CYLINDER (TRACK) PULSES TO DIFF. CTR, 1584 REVERSE

CARRIAGE MOTION

FINE LATCH, 1634

ON CYLINDER, 1631 REVERSE END OF TRAVEL, 1664 SEEK FINISHED OR SEEK INCOMPLETE LOAD FF, K5O4 FORWARD LATCH, 1511 FIRST SEEK, K5O3 T:I6

ENABLE, 1517

INHIBIT

‘PS—.

HEADS LOADED CYLINDER (TRACK) PULSES FORWARD END OF TRAVEL, 1670 Y5O2

101 1405

Y5O4

1405 T404 T403 1402T401 101

flflflflJlqfrfl

ip SEC

I Ifl

_—‘-——-

I I I.75NS

CONTENT OF DIFF

COUNTER

®

^10611071

I I

Figure 5-2. Power On/First Seek Timing

7F22

70614700 A 5—3

DIFFERENCE TAG

HEAD/DIRECTION TAG

cjBITO (I)

cDBITI

(a)

QBIT2 (4)

cDBIT3 (8)

CD

(DBIT5 (32)

Ci)

(DBIT7 (128)

(DBIT8 (256)

____

I_

I II

Ii

II__rr_

I I

I I

I I

I_ I

I I

I I

I—

I—

II I

II

I_i —

II II II I I

CDii ^I

ri_

I I

I I

:

I_i

II I

It I

fl1

I I

I I

— I I

NOTES:

cD

80 TRACKS ACCELERATING FROM 01050 IPS 16 TRACKS AT 50IPS

32 TRACKS DECELERATING FROM 50 TO 25 IPS 31.5 TRACKS WITH VELOCITY DECREASING UNDER CONTROL OF D/A CONVERTER A637 AND DESIRED VELOCITY GENERATOR A63I

®

0

TAG __j)*___25oNs(MIw

TAG I f}350N8(MIN) II

FBOUT_._.IITL_..FL____

I5ONS(MIN)-44 )*I’ I’I—150N3(MIN)

DIFFERENCE COUNTER IS INCREMENTAL (COUNTS UPWARD ONLY). CONTENT IS ALWAYS THE COMPLEMENT: SII:CMPLM OFO AND 351: CMPLM OF 160.

FORWARD LATCH, 1511 SEEK FINISHED

Figure 5-4. Direct Seek Timing

7F24

5-5 Ic 350

CONTENT OF

DIFF COUNTER

L!.

SEEK FF K500/50I —

FINE LATCH, 1634

ON CYLINDER, 1631

FORWARD

CARRIAGE MOTION —

CYLINDER (TRACK)

PULSES, 1591 —

—-

1c——-—--—-——INCREASING FROM 350 TO 510 I I ⁵¹¹

Vr50 1.14 1.32 I I

/Jfl4

70614700 A

FBOUT 6 LINE COMMAND TAG

1-i n

SEEK FF, K500 COUNT INHIBIT, 1516 FORWARD

CARRIAGE MOTION CYLINDER

(TRACK) PULSES FORWARD END OF TRAVEL, 1670 Y502

Yr 406 STROBE, Y503 Y504

T:4O6 ENABLE, K506 GATED CYLINDER (TRACK) PULSES TO DIFF CTR, 1584 REV CARRIAGE MOTION

FINE LATCH, 1634

ON CYLINDER, 1631 REV END OF TRAVEL, 1664 SEEK FINISHED

CONTENT OF DIFF COUNTER

NOTES

—ht

I

—;;s=

TOI T405

n-il-n-

80 TRACKS ACCELERATING FROM 0 TO 50 IPS.

A. 50 IPS UNTIL 64 TRACKS TO GO.

B. 32 TRACKS DECELERATING FROM 50 TO 25 IPS.

C. 31.5 TRACKS WITH VELOCITY DECREASING UNDER CONTROL OF D/A CONVERTER A637AND DESIRED VELOCITY GENERATOR A63I.

D. CARRIAGE MOVES LAST HALF TRACK AND IS HELD STATIONARY BY FINE POSITION ANALOG SIGNAL.

CARRIAGE TURN AROUND AREA.

DIFFERENCE COUNTER IS INCREMENTAL (COUNTS UPWARD ONLY). CONTENT IS ALWAYS THE COMPLEMENT:

COMPLEMENT OF 16 :495 COMPLEMENT OF 406: 105 COMPLEMENT OF 0:511

7F26

LOAD FF, K5O4 FORWARD LATCH, 1511

FIRST SEEK FF, K5O3 I T:16 ENABLE, I5I7

60SEC—’I I.m—

n

T405 1404 1403 1402 T4OI TOl

-n-n-n-n-n-il-n

H

LrLnJLnr’1rnr—

I i I I

I I II

ii

1.75 MS—l

I

____

I I

0

511

I

I I

Figure 5-6. Return to Zero Seek Timing

70614700 A 5-7

START SWITCH

HYSTERESIS BRAKE POWER

_______

SPINDLE MOTOR POWER ENABLE REVERSE

CARRIAGE MOTION

_______

WADED R/WHEADS LOADED HEADS

LOADED S/W STATE

REVERSE HOLDING POWER TO CARRIAGE

SPEED RELAY K5

+40V TO READ/

WRITE CIRCUIT POSITIONER POWER RELAY 1<4

1

APPROX 300 MS——

R/W HEADS HEADS LOADED SW STATE SPEED RELAY K5

+4OV TO READ/

WRITE CIRCUIT EMERGENCY RETRACT RELAY 1<2 POSITIONER POWER RELAY K4

REVERSE CARRIAGE MOTION

NOTES:

[

APPROX 400 MS

—fr

I

III

APPROX 300 MS

0

ONE AMP (APPROX) OF HOLDING CURRENT APPLIED TO POSITIONER UNTIL K5 DROPS.

CARRIAGE MOVES TO RETRACTED STOP AT 60 IPS.

Figure 5-8. Power Off Timing

6T50

16 IPS

LOADED LOADED

—I

LOADED LOADED

INDETERMINATE

70614700 A 5-9

INDEX 1 1iSEC ‘-

HEAD/D RECT ION TAG

INTERNAL HEAD SELECT

-

SEC

0

70614700 A

.1OO _200

j*

(--15, 25 NSEC

—25) NSEC NSEC

NOTES:

0 0

READ DATA TIMING (AT /0 CONNECTOR)

TOLERANCE GAP 1 — 120 BITS — ACCOMODATES PHYSICAL READ/WRITE TO ERASE GAP DISTANCE AND ALLOWS HEAD SWITCHING AND READ AMPLIFIER STABILIZATION TII€.

SYNC PATTERN 1 - 112 BITS ^- INDICATES BEGINNING OF ADDRESS AREA. CONTROLLER P4.1ST INITIATE SYNC BYTE (OR BIT) SEARCH MIDWAY THROUGH THIS PATTERN (REI3JIRED TO INSURE THAT HEAD IS READING A KND PATTERN EVEN UNDER WORST-CASE CONDITIONS OF HEAD SKEW, RPM, AND INDEX TOLERANCES DUE TO DISK PACK INTERCHANGE).

ADDRESS - 36 BITS (TYPICAL) ^- TLVE-8IT UPPER ADDRESS, 12-BIT LOWER ADDRESS, AND 12-BIT CHECKWORD.

4 HEAD GAP - 100 BITS )MIN) — ACCOMODATES PHYSICAL READ/WRITE TO ERASE GAP DISTANCE.

5 SYNC PATTERN 2 - 112 BITS )MINIP4JM) ^— INDICATES BEGINNING OF DATA FIELD.

6 DATA F TELD ^- LENGTH DEPENDS UPON DATA RECORD FORMAT.

POST AMBLE - I BIT^- A PAD TO ENSURE THAT LAST BIT OF DATA IS NOT DESTROYED OR DISTORTED.

()

( HEAD/DIRECTION TAG LINE SHOWR OCCURRING AT LATEST ACCEPTABLE TUE RELATIVE TO INDEX: NOT TO BE CONSIDERED A TYPICAL RELATIONSHIP.

INDEX PULSE AVAILABLE TO CONTROLLER TO INDICATE BEGINNING OF TRACK OR CYLINDER.

7F_14

Figure 5-10. Read/Write Timing and Format

5—11

READ GATE

GATE

WRITE GATE I

ERASE GATE

HSEC BITS)

25 YSEC (60 BITS) I

SECTOR FORMAT

0’ 1 ‘0”

I I

‘I5

F

NSEC :

WRITE DATA TIMING (AT I/O CONFECTOR)

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