IBM 2310 Maintenance Manual

Page 1
Field Engineering Maintenance Manual
~~~@
Disk
Storage
Page 2
Field Engineering Maintenance Manual
Branch
Department:
Address:
____________
Office:
____________
___________
___________
If
this
manual
be
returned
is misplaced, it should
to
the
above address.
_
_
_
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Disk
Storage
Page 3
PREFACE
This
manual
Users
of
are
subject
notice
by gineering included
The
Storage
alone
Drive.
unit System, of
the
IBM 1130
within
the
This
tions
which
ment
malfunctions
perform
ment
in a state
CE
must
equipment,
plications
derived
from
Alternate
ment
in
the
serial
numbers
Content
chapters.
contains
this
manual
to
change
IBM.
Wiring
change in scope
each
level
machine
of
this
The
for
IBM 1800
and
is
an
Computing
IBM 1131
information
enable
corrective
of
have
completed
and
must
of
the
maintenance
training.
procedures
back
of
00001
of
this
preliminary
are
cautioned
at
any
diagrams
for a specific
shipment.
manual
machine
Data
integral
Central
consists
the
CE
to
in
the
Disk
maintenance
readiness
prior
be
familiar
are
this
manual
through
manual
time
and (logics)
is
limited
is
installed
Acquisition
part
of
System,
Processing
of
maintenance
rapidly
Storage
to
for
the
IBM
with
concept
provided
for
00050.
is
divided
information.
that
specifications
without
at
the
machine
to
the
in a stand
and
the
storage
physically
Unit.
diagnose
Drive
keep
the
equip­customer. training
for
practical
and
techniques
in a supple-
machines
into
seven
prior
en-
are
Disk
Control
system
located
instruc-
equip-
and
The
this
ap-
with
Chapter 1 contains diagnosing use
of
and
service
isolating
aids
and
Chapter 2 describes the
CE
to
accomplish
ations.
Chapter 3 contains scheduled ule
for
maintenance
accomplishing
Chapter 4 provides adjustments,
and
removal
ponents.
Chapter 5 provides a listing and
power
sequencing.
Chapter 6 contains CE
to
locate gages, contained
etc.,
in
components, which
are
the
manual.
Chapter 7 consists
vides
alternate
with
serial
The
ing
Manual 227-5985-1) operation, information
procedures
numbers
companion
of
Instruction
provides
and
may
contained
00001
publication,
be
instructions
equipment
functional
checkout
switches
checkout
and
instructions
and
includes a tabulated
periodic
maintenance
instructions
and
replacement
of
information
major
assemblies,
described
of a
by
supplement
applicable
through
IBM
2310
Disk
information
used
within
for
as a reference
this
manual.
and
procedures
malfunctions
procedures.
and
controls
maintenance
for
performing
operations.
for
service
of
power
requirements
which
enables
the
instructions
which
to
machines
00050. Field
Engineer-
Storage
the
(Form
theory
to
for
by
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used
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sched-
checks,
com-
the
meters,
pro-
of
augment
Copies
of
th is
and
other
IBM
publ
ications
can
be
Comments
IBM,
©
Product
1965
concerning
Publications
by
International
the
contents Department,
Business
of
this
Machines
publication
San
Jose,
obtained
Calif.
may
through
be
95114
IBM Branch
addressed
Offices.
to:
ii
Page 4
CONTENTS
CHAPTER 1 DIAGNOSTIC
1. 1 Diagnostic
1.2
Functional
1. 3
Read
1.3. 1 Read
1. 4
Write
1.
4. 1
1.5
Access
Techniques Check.
Malfunctions
Circuit
Malfunctions
Write
Circuit
Malfunctions
1.5. t Access
1. 5. 2
1. 6 Base
1. 7
CHAPTER
2. 1
2.
2 CE Disk
2.
3 CE
2.4
Detent
Plate
Troubleshooting
Aids
7. 1
Track
7. 2
Disk
Homing
7. 5 Errors
Component
•••••••••••••••••••••••••••• Addressing
Formatting
Retry
and
1. 6. 1
Service
1.
1.
1. 7. 3 Error
1. 7. 4
1.
2 MAINTENANCE FEATURES
Leading
Particulars
Cartridge Control Switches
Panel
.•••••••••••••••••••••••••••
Select
Mode
CE
2.4. 1 Head
2.4. 2 Step
2.4. 3 Direction
2.
2.5
4. 4 Step
Tools
2.
5. 1 Standard
2. 5. 2
2.5.3
and
Test
Special Branch
Control
AIDS • • • • • • • • • • • • • • • •
.••••••••••••••••••••
• • • • • • • • • . • • • • • • • • • • • •
••••
; • • • • • • • • • • • • • • • • •
Troubleshooting
••••••••••
..•••••••••••••••••••••
Troubleshooting
.•••••••••••
•••••••••••••••••••••••
Circuit
Assembly
Malfunction
and
Malfunctions
Base
Troubleshooting
Rack
Troubleshooting
Plate
Components
••••••••••••.
••••••••••••••••••.••
Procedure
Procedure
the
Carriage
Data
Retrieva I .••••••••••••••
••••••••••••••
•••••••••••••••••
••••••••
.••••••••••••
.•••••••••••••.••••••••
.•••••••••••••••••••••••
•••••••••••••••••••••••••
~witch
Switch
Switch
Switch
Equipment
Tools
Tools.
Office
••••••••••••••••••
••••••••••••••••••••
•••••••••••••••••••••
••••••••••••••••••
•••••••••••••••••••
• • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • •
Tools
•.••••••••••••••••
;
•••••••••
•.••••
CHAPTER 3 SCHEDULED PREVENTIVE MAINTENANCE PROCEDURES
3. 1 Approach
3. 1. 1
3. 1. 2 Electronic Circuits
3.
3,
3. 2 Scheduled
3. 2. 1
3. 2. 2 Lubrication
3.2,3
3. 3
Head
3.3. 1 Particle
3.3.2
3.3.3
3.3.4
CH-\PTER
••
,...........................
to
Visual
Scheduled
Inspection
Preventive
Maintenance
••••••••••••••••••••
.••.•.
1. 3
1. 4
and
Mechanical
Cleanliness
Cleaning
Drive
Disk
Particle Non Disk
Units
...•••.•
Maintenance
Read/Write
of
Belt
Tension
Cartridge
Damage.to Damage
Particle
Damage
Cartridge
•••••••••••••••••••
Procedures
Heads
Machine
Adjustment
Scratch
Disk
to
Head
and
Read/Write
II
• • • • • • • • • • • • •
••••••••••••••••
Description
••••••••••••••
••••
•••••••••••••••••
4 SERVICE CHECKS, ADJUSTMENTS,
II
••
, • • • • • • •
•••
,.,
••
, • , • , • • •
,.,
Head
•••••
••
,.,..
,.,
••
,.....
Damage.
AND
REMOVAL PROCEDURES • • • • • • • • • • • • • • • • • • • • •
4.0
Index
of
Service
Checks,
4. 1 Drive
4. 1. 1
4.
1. 2
4.
1.3
Motor
Drive Drive Spindle
and
Drive
Belt
Removal
Motor
Assembly
Adjustments
Belt
Removal
Removal
••••••••••••••••••
and
and
and
Replacement
Replacement.
and
Replacement
Removals
• • • • •
• • •
••
1. 1
1. 1
••
1. 1
••
1. 1
1. 1
_
••
1.2
1.2
1.4
•••
1.4
•••
1.4
1.6
1.6
1.6
1.6
1.6
1.7
1.7
1.7
2.1
2.1
2.1
2.1
2.1
2.1
2.1
2.2
2. 2
2.3
••
2. 3
••
2. 3
2.3
3. 1
3.
1
3.
1
••
3. 1
3. 1
••
3. 1
3.1 3,
1
3. 1
••
3.4
••
,.
3.4
,
3.4
3.4
3.4
••
3.4
••
4.
1
••
4.
1
4.
2
••
4.2
••
4.2
••
4.2
4. 2 Cartridge
4.
2. 1
4.
2.
2
4.
2. 3 Disk
4.2.4
4. 3 Plenum
4.
3. 1 Plenum
4.3.2
4.4
Blower
4.4.
1 Blower
4.4.2
4.4.3
4.4.
4 Blower
4. 5 Actuator
4.
5. 1
4.
5. 2
4. 6 Drive
4.
6. 1
4.
6. 2
4.7
Detent
4.7. 1 Detent
4.7. 2 Detent
4.7.3
4.7.4
4.8
Head
4.
8. 1
4.8.2
4.
8.3
4.9
Head
4.9. 1 Head
4.
10
Crash
4.
10. 1
4. 10. 2
4.
11
Home
4.
11. 1
4.11. 2 Home
4.
12
Tachometer
4.
12. 1
4.
12. 2
4.
12.3
4.
13
Carriage
4. 13. 1
4.
14
Carriage Replacement.
4.
14. 1
4.
15
Carriage
4. 15. 1
4.
16
Read/Write
4.16.1
4.16.2
4.16.3
Assembly
Cartridge
Visual
Height
Disk
Cartridge
Air
Filter
Plenum Assembly
Blower Blower
Assembly Actuator Access
Magnet
Drive
Drive
Assembly
Detent Detent
Load
Assembly Head Head Heads and
Adjustment
Load
Spring
Replacement
Stops
Front Rear
Switch.
Home
Tachometer Replacement Tachometer Tachometer Replacement
Rail
Carriage
Preload
••••••••••••••••••••••••
Service
Check
Inspection
and
Run
Replacement
••••••••••••••••
••••••••••••••••••••• Out
Check
Conditions
•••••••••••••••••••••••••
Filter
Flow
Test
Air
Filter
.,
•••••••••••••••••••••••• Assembly Wheel
Removal
Scroll
Removal
Motor
Removal
Removal
Removal
and and
••••••••••••••••• and
and
and
Replacement Replacement Replacement
•••••••••••••••••••••••••
Assembly
Removal
and Adjustments and
Coil
Removal
Removal
and
Detent
Removal Adjustment
•••••••••••••• and
and
Replacement.
Rack Removal Adjustment
and
••••••••••••••••
Replacement
• • • • • • • • • • • • •
and
•••••
Replacement
Magnet
Coil
Assembly
Assembly Rack Rack
••••••••••••••••••••••••
Load
Load
Loaded
Load
Solenoid Assembly
Assembly Spring
Removal
and
Adjustment
Switch
Removal,
•••••••
,..............
• • • • • • • • • • • • • • • • •
Assembly
Removal
• • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • • • • • • • • Crash
Stop
Stop
Adjustment
Adjustment.
Crash
• • • • • • • • • • • • • • • • • • • • • • • • • Switch Switch
and
Tachometer
Removal
Adjustment
Extension
and
Replacement
••••••••••••••• Extension Rod
Removal
.•••••••••••••• Extension Assembly
Rod
Adjustment
Removal
.••••••••••••••••••••••
••••••••••••••••••••••••••• Rail
Removal
Bearing
and
Assembly
Replacement.
Removal
• • • • • • • • • • • • • • • • • • • • • • • • •
Carriage Replacement
Carriage Replacement
Read/Write Read/Write
Read/Write
Preload
Subassembly
Subassembly
Heads
Head Head Head
Bearing
Assembly
•••.•••.•••.•••
•..•••••••..•• Removal
. . • • • • • • . • . • • • • • • . . •
.••••••••••••••••••••
Service
Check
Replacement
to
Base
Plate
• • • • • • • • • •
•••••••
Replacement
Replacement
••••••
••••••
Replacement
,
•••••••
• • • • •
Replacement
, • • • • • •
••••••
Replacement
•••••••••••
Replacement,
and
•••••••••••••
• • • • • • • • • • •
•••••
Rod
• • • • • •
and
, • • • • •
and
and
Removal
and
.•.•••••••• .••.•.••.••
Resistance
Chccl< •
• •
•••
and
4.
2
4.
2
4.
3
••
4.
3
4.4
4.4
4.4
4.4
4.4
4.4
4.4
4.5
4.5
4.5
••
4.5
4.5
4.9
4.9
••
4.
10
••
4.
10
4.
10
••
4.
10
4.
10
4.
12
4.12
••
4.12
4.12
4.
14
••
4.
14
••
4.
14
••
4.
14
4.
14
••
4.
14
••
4.
14
4.
14
4.14
••
4.
14
••
4.
14
4.15
4.
15
4.
16
••
4.
16
••
4.
16
4.16
4.16
4.
16
1.
17
4. 17 '1.17
4.17
iii
Page 5
4.
17
Head-Arm
4.17.1
4. 17. 2
4. 18
Cartridge
4. 18. 1
4.
18.2
18.3
4.
4.
19 Interlocks . • • • • • • • • • • • • • . • • • • • • • • • • • •
4.19.1
4.
20
Sector
4.
20. 1
4.20.2
4.21
Data
4. 21. 1
CHAPTER 5 POWER
5. 1
Power
S.
1. 1 AC Input Supply Power
5. 1. 2 DC Input Power
5. 2
5. 2. 1
2.
5.
5. 3
Power Line
5. 3. 1 Input
CHAPTER 6
6. 1
General...............................
CHAPTER 7
MAINTENANCE
7.1
Purpose
7.2
Alternate
7. 2. 1
7.2.2
7.2.3
7. 3 Plenum
7.3. 1 Plenum
7.3.2
7.4
Blower Assembly
7.4.
7.4.2
7. 5
Actuator
Assembly
Head Head Replacement
Receiver Cartridge Replacement Cartridge Cartridge
Handle
Transducer Sector Sector
Replacement
Separator.
Data
Separator
Requirements
Sequencing
Power
On
2 Power Off
Interface
Power Lines
LOCATIONS
SUPPLEMENT FOR ALTERNATE
INSTRUCTIONS.
of
Supplement
Maintenance Identification Special Branch
Cover
Plenum
1 Blower
Blower
Assembly
Assembly Motor
••••••••••••••••••••••
Arm
Assembly
Arm
Assembly
Receiver
Receiver In
and
Transducer Transducer
• • • • • • • • • • • • • • • • • • • • • • •
SUPPLY
Supply Power
•••••••••••••••••..••.•.
Sequence
Sequence
Tools
Office
and
Filter Cover Air
Filter
.•••.••••••••••••.•••.
Adjustment
.•••••••••••••••.•••••
• • • • . • • • • • • • • • • • • • • • • Removal
•••• Adjustment
Place
Switch
Interlock
.••••••••••••••••••••••
Index
Removal
• • • • • • • • • • • . • • • . . . • .
Adjustment
••••••••
. . • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • •
•••••••••••••••••.
••••••••••••••••••••••
to
Disk
••••••••••••••••••••••
.•••••••••••.••••••••
Features
of
Machines
••••••••.•••••••••••••
Tools
•.••••••••••.•••••
.•••••••••••••
Removal
Removal
Removal
Removal
Removal
• • • • • • • • • • • • • • • •
Adjustment
•••••••••••••.••
••••••••••••••••
• • • • • • • • •
and
and
.•••.•••••
and
and
.••••••••.
Adjustment
••••••••••
Timing
Adjustment
and
.••••••••••••
• • • • • • • • • •
Storage
Drive
••••••••••••••• .•••••••••••••
Replacement
and
Replacement
••••••••••••••
Replacement.
••
•.••••
••.••
• • • •
• • • • .•••
• •
4. 17
4.17
4. 17
••
4. 19
••
4. 19
4. 19
4.20
••
4.20
4.20
4. 22
.•
4.
••
4. 24
••
4. 24
4. 24
•.
5. 1
••
5. 1
5. 1
5. 1
5. 1
••
5. 1
5. 1
5. 1
, 5. 1
·6.1
6. 1
••
7.1
7.1
7.1
7. 1
7.1
7. 1
••
7. 1
7. 1
.•
7. 1
7.2
••
7.2
" 7. 2
22
7.5. 1 Actuator
7. 6 Drive
7.7
7. 8
7.9
7. 10 Crash Stops
7.
11
7. 12
7.
13
7. 14
7. 15
7. 16
7. 17 Interlocks • . • • . • • • • • • • . • • • • • • • • • • • • . •
7. 18
INDEX.
Replacement
Magnet
7.6.
1 Drive
7.6.2
Drive
Detent
Assembly
7.7. 1 Detent
7. 7. 2
Detent
7.7. 3 Detent
7.7.4
Detent
Head
Load Assembly
7. 8. 1
Head Replacement
7.
8.
2
Head
Head
Load Spring Assembly
7.9. 1 Head Spring
7.10.1
H:>me
7. 11. 1
7.11. 2 H:>me
Tachometer
7. 12. 1
7. 12. 2
12.3
7.
Carriage
7.13.1
Carriage
7. 14. 1
Head-Arm
7. 15. 1
Cartridge
7.16.1
7.
16.2
7. 17. 1 Sector
7. 18. 1
. • • • • • • •
Assembly
.••••••••••.••••••••••••••• Magnet Magnet
Assembly
Assembly
Rack Rack
Load
Load
Load Spring
Adjustment
••••••••••••••••••••••••••••
Rear
Crash Stop
Switch
Handle Transducer. Sector
.•••••••••••••.•••••••••••
Home
Switch Switch
and Tachometer Tachometer Tachometer
Replacement
Rail
••••••••••••••••••••••.•••
Carriage
Carriage Replacement
Head-Arm
Cartridge Replacement Cartridge
Rail
Subassembly
Subassembly
Assembly . • • • • • • • • . • • . • • • • • • •
Receiver
and
Transducer
••
Removal
.••••••••••••••••••••••
Removal Adjustment
and
Detent
Removal
Adjustment
Removal
Adjustment
.•••••••••••.•••••••.••
Solenoid
••••••••••••••••••.••••
Assembly
Assembly
. • . • • • • • • • • • • • • • • • • •
Adjustment
Removal Adjustment
Tachometer
Extension Rod Extension Rod Assembly
.•
• • • • • • • • • • • • • • • • • •
Removal
•••••
••••••.•••••••••••••••
Assembly
• • • • • • . • • • • • • • • • • • • • •
Receiver
..•••••••••••.•.••••..
Receiver
Interlock
. • . • • • • • • • . • • • . • • • • • •
Index
• • • • • • • • • • • • • • • • • • • • • •
and
and
Replacement
.•••.••••••••••
Rack
•••••••••••.••
and
Replacement
.•••••.••••.•
and
Replacement
.••••••••.•••••
Removal
Adjustment
Removal
Adjustment
and
.•••••••••••••••••
and
Extension Rod . • • • •
Removal
and
• • • • • • • • . • • • • •
Removal
Adjustment
Adjustment
••••.•••••
Counterbalance
••.•••••••••
Replacement
•.••••••••••••
Removal
Adjustment
and
Replacement
and
and
•••••.•...
Timing
Adjustment
•••••
• .
••••
.••••••
.•••
•.•••••••
.••••.•.•
•••
••
.• .•
••
••
••
••
•.
.•
7.2
7.3
7.3
7.4
7.4
•.
7.4
7.4
7.5
7.6
7.6
7.6
7.6
7.9,
7.9
7.9
7.9'
7.9
7.9
7.9
7. 10
7. 10
7. 10
7. 11
7. 11
7.11
7.
11
7.
11
7. 12
7. 12
7. 13
7. 13
7. 13
7. 15
7. 15
7. 15
7. 15
I.1
iv
Page 6
Personal
sure
to
follow familiar mM to
all
AC
The Storage
the
spindle
when tact
shields
Isopropyl
Use
2155966)
types to
impurities.
safety
your
own
safety
with and
cards,
Forms
Customer
Power
Start
and Stop
Drive
machine
but
drive
servicing
110/220-volt
and
covers
Alcohol
only
mM
for
cleaning
may
cause
is a flammable quantity
needed
office.
Keep
the
hol
in
the
sealed
When shipping
with
the
appropriate
tainer)
for
shipment
cannot
safety,
precautions
use
124-0002 and
Engineers.
switches
do
not
simply
motor.
the
machine
connections
provided.
approved
damage
The
91%
liquid,
for
impending
plastic
bottle
metal
91%
regulations of
be
overemphasized.
make
it
an
at
all
safety
practices
on
apply and
energize
Caution
must
since
despite
91%
Isopropyl
of
read/write
and/or
isopropyl
therefore,
use
containing
container
isopropyl
flammable
every
day
times.
outlined
M04-8401,
the
mM
2310
turn
off
ac
and
de-energize
be
exercised
objects
the
can
safety
Alcohol
heads.
contamination
alsohol
keep
only
in
the
customer's
isopropyl
except
when
alcohol,
(noted on
liquids.
To
en-
practice
Become
in
issued
Disk
power
con-
(P/N
Other
due
solution
the
alco-
in
use.
comply
the
con-
to
the
Never
disassemble a disk
cartridge
assembly
which cannot
The
disk otherwise stored this which tridge the
subjected
on a protruding
nature
effects
housing.
cartridge
read/write
Disk
Cartridge
DC
power
must cartridge. dc
power
is
riage
returns inserted riage the contains condition neer
without
could
cartridge
interlocking
from
violates
switches.
CE
Restricted
Do
not
write through tracks
other
110.
95,
100, and 105 which
tracks
be
disassembled
cartridge
could
result
centering
Damage
unusable
heads.
Insertion
always
The
machine
on, and ac
to
home first
be
in
some
could
strike
occurring
or
overrides
Tracks
on
the
CE
This
band
may
be
cartridge.
is a permanently
without
should
to
top
object.
in
of
and
be
power
position.
turning
position
switches
on
disk
used
never
loading.
deforming
the
disk
to
the
could
into
Machine
on
before
is
interlocked
is
on
the
heads.
which
unless
the
safety
Disk
Cartridge
cartridge
contains
will
for
test
Handling
within
diaphragm
cause
turned
If
the
dc
other
the
prerecorded
be
purposes.
The
encased
damage.
be
stacked
Nor
should practices
the
diaphragm
the
will
damage
insertion
so
that
off,
cartridge
power,
than
home,
The
machine
prevent
Customer
function of
at
tracks
destroyed.
SAFETY
disk
unit
or
it
car-
render
to
of
the
when
the
car-
is
the
car-
this
Engi-
these
90
test
be
of
and
Any
WARNINGS: Disk
Storage eration are
described
icing
procedure.
listed
below.
Disk
Cartridge
Cleanliness disk
cartridge.
the
read/write opened when cept
when
to
clean bottom Serious foreign
There Drive
or
improper
must
the
using
disk.
surface
damage
particles
are
can
servicing
in
the
text
The
Handling
be
maintained
The
heads
cartridge
the
disk
Also,
of
the
to
disk
are
many
be
damaged
under
most
Significant of
cartridge
must
never
is
out of
cartridge
the
air
valve
cartridge
surfaces
introduced
ways
in
which
by
improper
techniques.
the
appropriate
while
handling
door
which
be
unlatched
the
machine cleaning located
must
never
could
result
inside
the
the
2310
These
serv-
these
are
the
receives
and
ex-
fixture
on
the
be
opened.
if
cartridge.
op-
Read/Write
Avoid touching Acids
from
Do
of
the
machine, system load
heads
card
should gliding heads
must
done.
Machine
Head
loading
ating
the
is
to
provide
v
Heads
the
not
load
is
not
operating.
under
be
surfaces
be
Operation
precautions
machine.
ac
the
gliding
skin
can leads when
these
inserted
from
cleaned
Proper
and dc
surface
etch
and
manually
disk
is
stopped,
If
it
becomes
static
conditions,
between
possible
damage.
immediately
must
be
operation
power
to
of
read/write
ruin
the
head.
when a cartridge
or
when
necessary
a folded IBM
the
heads
to
protect
Read/write
whenever
observed
of
energize
the
the
this
when
machine
hlower
heads.
is
out
blower
to
is
oper-
Page 7
system is raised Power and
motor cartridge operated
then
the
If
power without a
to is
and home
inserted,
lower
the
applied
spindle will
is
applied to
cartridge
in
place
to
energize
the
carriage.
and
the
cartridge
to
the
come
switch
the
receiver
disk
up
the
present,
can
motor
onto
drive
to
be
to ing of heads; however, a folded should
be
inserted
between
the
protection.
The
handle the
motor
speed.
disk
manually
effect
mM
heads
cartridge
is
spindle.
drive the
load-
card
for
DC
Power
The
+3
vdc,
to, and
removed prevent Storage
plied
damage to Drive.
without Tachometer Turn
off dc
cable. trolled
If
this
with
-3
vdc, and
from)
the
internal
The +48-vdc
all
other
dc voltages being
Cable Removal
power
before
is
not done,
resulting
damage to
+6
vdc
power
machine
circuits
power
removing
accessing
the
at
the
of
must
the
may
access
the
must
be
applied
same
time
2310 Disk
never
be
present.
tachometer
be
uncon-
mechanism.
to
ap-
vi
Page 8
1.1
DIAGNOSTIC TECHNIQUES
CHAPTER 1 DIAGNOSTIC
1.
2 FUNCTIONAL CHECK
AIDS
WARNING: circuit part
of
with
the
could
cards. the
circuit.
d-c
damage
Voltage
Metal
power
on,
transistors
is
Avoid
circuit.
WARNING: A potential head
pick,
cartridge
.voltage
is
probing
avoid
regulator
present
near
possible
for
circuits. A potential
write
circuits.
SLT
cards
shorts
damage.
Intermittent by
vibration.
plastic
should
vibrations
problems
Tapping the edge of
handle of a
be
sufficient.
can
cause a short
screwdriver
components.
Conditions jumper outputs taken during result. ages For
placed
other
in
to
to
these
which
the
majority
ground
cases
ensure
More
knowledge of
Special
system
diagrams.
waveforms
When positioning of properly the
gate.
outer
edges minimize interferes
provide a preload
signals
check
checks,
important,
can
will
must
the
circuit
for
the
electronic SLT
replace
This
of
the
card
vibration.
with the
will
arise
or
certain
that
logic
damage
of logic
create
be
treated
circuits
card Also shown
most
of
cards,
the
support
cards
bottom
on
ends
present
caps
on both
of
transistors
pulling
since a resultant
or
other
of
+48
volts
lock,
access
Exercise
containing
which could
can
sometimes
in
Use
caution
circuit
where
voltages
it
to
specific
functions.
blocks
as
erroneous
are
avoid the
or
destroy
block
cases, a properly
the
effect
individually
involved.
diagrams
are
these
cards.
gate
is
opened
care
should
SLT
card
support
serves
with
The
of
of
to
the
support
the
electronic
the
SL T
gate
sides
of
are
often a
or
replacing
short
components
is
present
amplifier,
these
result
be cards the
area
because
in
is
desirable
and
of
+36
care
when
circuits
in
extensive
aggravated
with
the
suspected
excessive
adjacent
volts
inputs
Care
should
not
overloaded
indications will
use
of high
the
transistors.
desired.
All
based
are
shown
in
input and output
to
check
be
taken
before
rigidly
housing
closing
brace
to
normally
gate
cards.
most
cards
circuit
in
the
for
to
card
to
or
be
volt-
on
the
the
to
the
to
The functional check
ment
without Central that
the
selection,
head will
perform
The CE
come
active between nected. control tically vertent CE to
examine
using
Processing
drive
actuator,
and
as
required.
control
only when the CE
system
control
Upon disconnecting
circuits,
placed
erasure
the
in a read
of
the
The functional check
NOTE: writing
1.
2.
3.
4.
5.
No
CE check
information.
Remove CE
Ensure
Install
Energize
ac
and dc
CE
cartridge.
drive
Interlock
Using CE SWitches,
each
head
to
determine
satisfactorily.
1.3
READ MALFUNCTIONS
1.
3. 1 Read
All
are
coupled with
set
and incompatibility write card
when
When Ready condition and the (track
to
rotate.
Circuit
read/write
the
produces a write
exists
lines.
Always neither the
Write-Lock
read
is
carriage
000) and
will
stop
provides
signal
for
control
Unit (CPU).
carriage
start/stop
panel
equipment functions
contains
Interlock
and
the
IBM 2310
this
disk
storage
select
mode recorded read
is
is
data,
circuit
to
be
accomplished
provided
and
signal
power
is
available
motor.
access
carriage
that
Troubleshooting
safety
circuits
write
lock
latch,
select
error
at
gated
outputs
check
the
write
nor
write
latch
becomes
removed
while
access
the
from
to
home
disk
operating
circuits
This
check
access
motion,
switches
signal
cable
from
drive
is
to
prevent
and
to
allow
recorded
on
the
2310
cable.
to
and
machine
operates
(Figure
in
the
machine
which
signal
from
driver
operations
set,
the
machine, position
will continue
the
of the
verifies
which
cable
is
discon­system
automa-
inad­the
data.
as
follows:
for
machine.
select
1-1)
becomes
when read/ SL T
function.
File
equip-
be-
227-5984
(9/65)
1. 1
Page 9
It
will be
drive
motor
set
the
a
File
Ready
WARNING: pers
of any kind on read/write or
data
these
points.
The
the
Preamplifier/Write Amplifier All
cards
The
signal input to the pattern) from
.
the double frequency The
read
necessary
to
reduce
to
disk
turn
speed
latch --then power up
status.
Do
not put scope
lines
comming
heads. The
destroyed
read
circuits
by
heads
the
presence
consists
Driver
SLT
Card,
and Data
are
located
preamplifier
and 726
read
amplifier
gate
is
in
the
circuit
read
amplifier
KC
(all
one's is
single ended, and
data
to
the
the only gate
electronic
off power
to
the
machine to
probes,
can
of SLT
Separator
provides
of 360
pattern). The output
data
separator
required
amplifier.
A CE
Test
Point
and
is
located plifier tiator
TP sured
mum to 3.
with
age will side speed
shoot
for
Both Heads
for
CE
use.
circuit
D2
at
is
G07. Output of
pin
location
The voltage
15
v maximum.
respect
to
prevail
track
because
relative
to
The following
read
circuits:
read/write
in
2310
Input to
measured
at
TP
n2
the
B03.
D2
at detector
G07
This
the
track
being
at
the
outside
of
the
difference in
the
read/write
analysis
is
Oscilloscope display
circuits
Fail
are
to
shown in
Read -
the
amplifier
the
CE
should be 1. 5 v
voltage will
read. A higher
track
head.
to be used
1. Heads not loaded. Check visually.
2.
Carriage
at
incorrect
cylinder
Check visually.
DC
3.
voltage supplies not
is
an
unsafe condition. Check interlock SLT
In a
read
select
mode,
should be
set.
at a correct
the
write
NOTE: Voltages should be checked
4. Head not head
ground
5. Data Check
selected,
select
line
level
separator
for
Read Clock output on C2
(+3 v level
for
head
circuit
or
both heads
one).
has
for
improper
Read Data output on C2 D05.
6. Read
signal card
amplifier
at
at
location
has
detector
no output. Check
circuit
D2
B03.
on
read
to
the
30 RPM to
leads,
directly
from
be damaged
of voltages
read/Write
Card,
Read
SLT
gate.
a differential
KC
(all
SLT
by
the
on the
read
differen-
Test
amplifier,
circuit
than
disk
is
at
the surface
to
trouble-
patterns
Figure
Probable
to
read
1-1.
causes:
disk.
level.
lock
latch
at
the
SLT
selected.
head
zero
output.
D03
and
for
amplifier
re-
attain
or
jum-
and/
at
heads,
card.
zero
provides
card.
read
am-
mea-
mini-
vary
volt-
in-
This
card.
board.
Check
and
output
SLT
7. Read
2310 Reads But
amplifier
has
ence of input signal
circuit
Point
on
TP
read
D2
amplifier
G07.
Generates
no input. Check
at
Amplifier
SLT
Read
Differential
card
Errors -Probable
at
for
CE
Causes:
1. Machine a.
Head operative. for
b. Line
that isolated
c.
Open head diode(s). Replace
write
select
transistor
Check
malfunction of
noise
present
head-arm
driver
from
assembly
frame
card.
particular
for write head
in
read
ground.
driver
select
is
head:
this
head
SLT
transistors.
signal. Check
electrically
preamplifier/
fails
to
read
on a
d. Disk speed detection output fluctuates. Check
for
sector
Possible
e.
Data provide Read Clock output Read Data output
separator shot which
permit
f. Head shoe dc
plate
g.
Intermittent
coils
h.
Heads
2. Machine ticular
head.
a. Disk Speed
Check
b. Weak
proper
Check
proper
c. Head shoe dc
plate
d. Bad head. Check
amplifier
e.
Intermittent preamplifier/write
f.
Intermittent SLT
g. Head
of
read/write
1.4
WRITE MALFUNCTIONS
1.4. 1 Write
write
apparent
select
NOTE: An by a
time
of 5
ms
between
that
speed
detector
separator
data
should
and ground of
improperly
makes
for
read
loading of head
for
force
should
circuit
adjustment
gates
pulses
resistance
be
5 ohms
short
defective --does not
at
C2D05. Check
of 600
between clock
to
pass.
relative
or
between
read/write
aligned
frequent
detector
read
errors
output fluctuates.
defective speed
signal
at
head. Check
against
defective head. Check
on head-load spring.
resistance
be
output
open
5 ohms
at
in
relative
or
for
presence
pin
location D2B03.
head diodes. Replace
driver
head
select.
card
for
malfunction of head
is
out of alignment. Check alignment
head
with CE
Circuit
Troubleshooting
failure
error
to
condition when the
write
pulses.
is
defective.
at
C2D03
nsec
single
pulses
to
less.
coils,
or
head.
to
read
on a
detector.
disk
for
to
less.
of
SLT
card.
Check
write
select
track
100.
(Figure
can
be
Write
track.
for
read
data
caused
pres-
Test
is
in-
card
and/or
to
base
between
par-
im-
surface.
im-
base
driver
circuit.
1-1)
Lock
1.2
Page 10
100Y/CM
~
/'
r
.-
V.
....
i!.
T
Iu
1.-
~
.,
.r..
r
...
.J~
r
....'11
..J
1/
E2B08
Write
Oscilla-
tor Output
nal
Sig-
500Y/CM
Oo5},lS/CM
Oo5Y/CM
1\
I.
II
/~
j
\1
1\.
/
\
I/fI1'
"
\
~
f
\
/\
L
~
\ J
\
\
-.
.,
.J
'\
\
'u
~
I
I
Write Resistor Peak-to-Peak Yoltage
\.
Read
\
.,
AT (After Differen­tiation)
H2D02
D3B07
Signal
CE
TP
~
(
100Y/CM
I
II
I
Oo2J.!S/CM
-
Figure
1-1.
Oscilloscope Display
227-5984
(9/65)
I
-)
\
of
Read/Write
\
\
~
(
Circuits
C2812
Data Separator Fed Osco TP
"""
and ing 600nsec
gle Shot
Data
by
GOO
Bit
Write
G13
Show-
Sin-
Gating
C2B05
1.3
Page 11
latch
becomes
set
because malfunction. Check read/write write trouble. status
Information
the
write complete machine
line
driver
Refer
conditions
data control
is
and
Write
The
write
safety
circuit
SLT
card
to
section
caused
to
be
written
line.
of the
conditioned
Clock Gate
circuits Preamplifier/Write Safety SLT SLT
card.
card,
All
and
cards
gate.
The
write
amplifier with
three
lines:
MC
Oscillator
the
write
of
The following
shoot
write
Both Heads
1.
Heads not
2.
Write
gate
write
data
line
should
erase
circuits
3.
Write
resistor insufficient. write
resistor
2310
Generates
1.
Intermittent
2. Output of is
incorrect.
3.
Write
resistor cient. resistor
1.5
ACCESS MALFUNCTIONS
1.
5. 1 Access
The
access
SLT
card,
sembly,
and components duration
carriage
of
motion.
Write
Signal
signal
at
analysis
circuits:
in
2310
loaded.
is
not
to
enter
be
Peak-to-peak
Write
write
write
Peak-to-peak
should
Circuit
circuits
Access
detent
effect
control
drive
current,
of a
read/write
for a latched
before
or
read/write
1.
by
is
The
writing
system
to
write
line
consists
Driver
1.44
Mc
are
located
furnishes
Gate,
Line.
the
heads
Fail
to
Write -Probable
Check
at
the
the
at
ground
to
be
turned
voltage
should
be
Errors -Probable
driver
amplifier
voltage into
voltage
be
15
volts.
condition
investigating the
head
for
3.
1 which
setting
supplied
control
when
are
SLT
Oscillator
Write
of
this
to
process
the
at
ground
of
read/write
card,
in
the
the
write
Data,
lists
latch.
the
is
circuits.
Write
Write
and
electronic
The nominal dc voltage
is
+26
volts.
is
to
be
used
to
visually.
correct
machine.
level
level
for
to The write
on.
to
read/write
voltage
15
volts.
head
across
Causes:
or
write
amplifier.
on
write
data
the
head
is
across
the
Malfunction Troubleshooting
contain
Logic
mechanism.
the
Access
SLT
card,
These
of
detent
and dynamic
Amplifier
tachometer
circuits
operation,
braking
circuit
in
the
machine
2310 via
under
Gate
level.
heads,
Select
Trigger
driver
and a
trouble-
Cause:
allow
write
gate
and
is
the
lines
insuffi
write
as-
of
The
1.44
and
Whenever malfunction circuits, accomplished
1.
2. A 10
3.
4. A dynamic
and
justment
or
access display Figure
1.
5.
No than and
between
magnet to the determine acceptable made
1. With
2. Use
the
following
according
A deadband
mize
decelerated
adjustment
carriage
to
milli-inch adjustment decelerating limits
adjustment A 10 timing
after
track
is
and stopping
for a single
is
ms
single
of
the
detent
the
carriage
location.
balance smooth carriage
Some of
it
will
detent
travel
these
be
necessary
whenever a
whenever
a new SLT
circuits
patterns
during
for
1-2.
2 Detent
adjustment
initially
Assembly
of
the
locating
establishing a clearance
the
clapper
is
energized.
check
odd-even
signal
on
track
that
spacing
limits. A check
as
follows:
the
CE
Cartridge minutes stabilize
to aligned even detent
the
CE
for
with
CE
track
properly
temperature
switches
100 and
will
location.
3.
Access verify with engaged
the
the
that
test at
carriage
heads
track.
this
is
four
adjustments
to
procedures
is
oscillations
arrive
made
made
and 20
to
step
for
shot
to
has
at
milli-inch
calibrate
increment. A separate each
adjustment
correctly been
adjustment
operation
between
adjustments
to
perform a complete
single
adjustment
card
troubleshooting.
access
and
and
detent
the
assembly
pole
circuits
Rack
assembly
The CE
detent
operation
100 with
the
between
of
installed,
temperature
to
access
verify
with
this
be engaged
to
CE
are
still
The odd
track
location.
suspected
of
accomplished
when
the
a new
track
integrator
the
carriage
stepping
provides
seat
accessed
is
made
for
both
directions
track
000 and
are
inter-related,
is
substituted
are
Troubleshooting
is
against
of
0.006
( to. 001) inch
piece
while
cartridge
by
comparison
signal
on
tracks
detent
is
operation
allow
of
the
cartridge
of
the
machine.
the
that
heads
test
track.
at
this
track
105 and
aligned
properly
detent
in
accessing
are
to
be
Chapter
carriage
to
4:
mini-
is
location.
set
trip
level
for
motion within
mode.
for
in
the
rack
to
a new
to
obtain
of
track
200.
ad-
is
disturbed,
in
the
Oscilloscope
shown
in
made
other
the
rack
the
electro-
can
be
used
of
track
105
within
is
15
to
carriage
are
The
track
will
be
to
1.4
Page 12
2.0V/C
20j.lS/CM
M
K3D09
Transducer
1~'A
V
Drive Output tage
Coil
Vol-
20V/CM
2.0MS/CM
1.OV/CM
2.0MS/CM
..1-
l.
'"""'-i.
~
,
!-,-,-
~
i--
G2B04
Detent
Coil
Voltage
F3B09 Access Bridge 2-ohm
Feed-
Back Voltage
Figure
1-2.
Oscilloscope
227-5984
(9/65)
Display
of
Access
F2B09
Tach Signal
Voltage
Circuits
1.5
Page 13
NOTE: It apply a carriage
4.
slight
to
Verify
may
check
that
pattern
(100 and 105). A denotes within
1.6
1. 6. 1 The
following
ponents
1.
Remove
located from
2.
Check
allowable
BASE
PLATE
Troubleshooting
of
the
on
the
Sector
connections.
3.
sector of Check
ring
foreign
for
between
4.
Check
spindle
5.
Check
detent
detent
is
000) and
6.
7.
evenly
Check
Check
aligned detent head-load
movement.
S. Check
ness, contact ally
on
read/write
and
with
an
1. 7 SERVICE
These
instructions malfunctions the
CPU. A Symptom
applicable
failures
1. 7. 1
Since information position, riage detectable. using either address
service
of
this
Track
the
2310
to
hardware
positioning
Therefore,
system
as
part
field
be
necessary
pressure
head
the
same
is
displayed
discrepancy
that
the
spacing
limits.
COMPONENT MALFUNCTIONS
procedure
base
plate.
cover
by
removing
cartridge-guide
machine.
transducer
Check
and
transducer obstructions. 0 to
5-ohm
the
dc
gate
and
drive
mechanism
fully
engaged
that
odd
detent
with
rack
for
mechanism
head
check
head-load
heads
while
IBM
card.
AIDS
provide
which
interface
Index
Aids
type.
Addressing
does
not
provide
the
using
or
programming
or
head
record
of
the
address
data
along with
and
against
the
alignment
head
alignment
at
both
between
Base
Plate
is
to
be
posts
signal
to
determine
resistance
ground
belt
to
at
home
is
not engaged
crest
of
cleanliness.
flexure
spring
heads
for
diagnosing
with
(Figure
associated
any
system
except
selection
it
is
imperative
information
field
or
each
data
is
permissable
front
or
at
this
track
signal
track
locations
in
signal detents
Components
used
to
check
two
retaining
and
lift
lines
for
that
are
free
from
when
and
the
base
for
proper
determine
position
detent
rack.
for
non-binding
springs
for
proper
are
loaded
machine
programming
1-3)
lists
with
machine
carriage
in
the
errors
are
not
that
on the
in a separate
record.
to
rear
of
location.
patterns
is
not
com-
screws
cover
good
slots
in
build up
measured
plate.
tension.
that
even
(track
but
is
for
tight-
manu-
of
the
position
Home
in
car-
directly
the
disk
This
the
Symptom Index
Problem
Figure
1-3.
address
the
1.
Disk can tracks, disk storage
three
are
a 2315 a
customer
must
selected
7. 2 Disk
defects
effect
because
cartridge.
capacities
spare
maintained
Disk
procedure in
error,
The
procedure
1.
Starting
11100101
operation.
Sympton
Index
provide
information.
Formatting
on new
data
recording,
of
Using
tracks
for
Cartridge
utility
is
used
and
identify
to
be
with
~ead
must
Cause
of
Service
verification
Procedure
or
used
the
high
systems
based
to
ensure
the
life
is program to
locate
the
used
0,
be
written
Aids
2315
causing
density
should
on 200
that
of
the
used
in employing the
defects, alternate is
as
follows:
track
000,
and
C.
E.
of
the
Disk
loss
recording
therefore
data
tracks,
the
stated
cartridge.
a 2310
the
track
the
verified
M.
Reference
position
Cartridges
of
useable
of
program
allowing
capacities
Whenever
installation,
following
flag
the
locations.
pattern
by a read
of
the
tracks
1.6
Page 14
2.
Then verified
3.
If
successful,
be
continued.
itself
be
flagged and an
4.
To
ensure
use,
continuing with tracks. for
alternate
1.
7. 3 Error
The
IBM
provide
any cedure an
for a ten-retry
failure
must
automatic established ing a write machine defects, to the occur should
read/write this
alternate
at
this
stop however, without
error,
alternate
continue.
1.7.4
When from
Homing
initializing
an unknown
cremented
the
pattern
again.
the
However,
ten
times
on
that
the
it
should
be
the
Use
spare tracks.
Retry
Procedure
programming
of
access
be
used
track
flagging
in
the
file
operation.
malfunctions
formatting
track
new
alternate
and
request
the
recording
the
old
address
recorded
the
Carriage
the
location,
in
single
track
00010011
formatting
either
alternate
alternate
formatted
subsequent
tracks
systems procedure
or
write.
for
read
procedure
programs
In
order
procedure
to
record
track, attention at
the
track
should
and
carriage
the
steps.
must
be
procedure
if
an
error
pattern,
track
track
immediately
disk
in
locations
supporting
to
be
A fifty
errors.
if
errors
to
protect
as
opposed to
should
this
data.
the
of
the
alternate
be
the
program
to
the
Home
carriage
By
testing
written
should
repeats
the
track
address
is
alright
before
cartridge
200-202
the
utilized
retry
pro-
In
addition,
must
be
occur
against
first
If
errors
procedure
C.
E.
track
flagged,
should
position
must
be
for
and
must
written.
for
2310,
on
dur-
its
skip
If,
occurs
the
de-
Home
after
when
Track accomplished move
the
carriage
direction
stop. cation
1.7.5
A
sporadic be using
error to
read a record mean trouble
1.
so
This
signal
Errors
increase
corrected
the
scheduled
during a customer
the
loss
is
pinpointed
Thoroughly maintenance
the
Branch
to
read
2.
If
the
data surface and
an
imbedded
made
to
spot
with
Do
not
use
damage
3.
Temporary
but
make
damaged.
4.
If
all
else
the
affected
resort
to
each
step,
000
has
by
providing
that
carriage
will
present
to
the
and
by
cleaning
from
of
that
clean
procedure.
Office
the
data.
cannot
at
the
dislodge
lint-free
any
can
result.
replacement
certain
fails,
area
recover
the
program
been
reached.
an
203
tracks,
will
an
Access
using
system.
Data
Retrieval
in
random
the
maintenance
program,
the
file
data
to
in
the
head
the
heads
cleaning
be
read,
point
in
question
particle.
the
particle
tissue
other
method
that
the
it
may
be
on a
scope
the
data.
can
determine
This
can
access
heads
or
more
access
Home
errors
and
command
in a reverse
to
home
communi-
can
sometimes
disk
procedure. A solid
properly,
the
customer.
disk
using
Clean
fixture
examine
caused
area:
the
the
by
need
scheduled
disk
and
then
the
for a comet
An
by
and a
as
of
the
new
possible
trace
attempt
cleaning
serious
head
head
can
"scrubbing"
may
will
to
read
as
a final
be
to
and
cartridge
failure not
If
the
using
try
disk
trail
be
the
tool.
disk
be
tried,
not
be
227
-5984
(9/65)
1.7
Page 15
2.1
LEADING PARTICULARS
Maintenance Drive the
CE
istics
include
to
check
of
the
features
switches
and
machine
maintenance.
A CE
disk
cartridge Engineer and
for
radial
circumferential
ducer.
Special
level
to
properly
tools
are
service
ponents. A special
is
used
to
clean
read/write
A
Disk
Run Out
deflection
2.2
CE DISK CARTRIDGE
The
CE
disk
fied
by
its tridges has
disk.
tracking
timing which for
are
three
These
adjustment
adjustments
checks
future purposes. pre-recordings is
made
for
use
of
tracks
be
used
by
Fixture
of
disk
surfaces
cartridge
red
access
white
all
pre-recorded
tracks
detent
use
and
Care
must
contained
protection
90
through
the
CE
for
applications.
The
alignment
plished
tracks. track track The all heads
two
by
One of
100, 100
so
two
tracks
zeros
at a frequency
are
eccentric
using
CE
the
and
the
that
are
adjusted
tracks.
eccentricity
of
the
and
monitor
in a read
is
alignment
adjustment
available
the
Disk
Cartridge
is
(P
/N
door.
over.)
tracks
are
used
(track
(track
spacing
is
not
to
be
taken
of CE
110. Any
read/write
of
read/write
Track
tracks
other
is
written
of
to
read
(Section
mM
2310
controls
operating
select
used
by
of
read/write
of
at
machine
surfaces
used
to
0
2200001)
(Customer
The CE
on
for
100) and
095).
The
(track
be
used
not
on
these
tracks
100 which
is
written
written
is
built
with a
720
KC.
equal
amplitudes
4.
Disk
Storage
which
permit
character-
mode
during
the
Customer
heads,
the
sector
the
branch-office
and
Cleaning
of
measure
can
disk
each
its
the
disk.
vertical
be
disk
cartridge
side
of
trans-
com-
Fixture
identi-
car-
the
head-alignment
sector
105), for
to
tracks.
by
other
index
third
track,
is
provided
maintenance
damage
the
Allowance
avoidirg
tracks
maintenance
heads
is
accom-
consists
outboard
inboard
into
clock
from
the
pattern
of two from
track.
Read/write
of
17. 1)
the may
of
the
The
index
track
095. A
recorded
.
positioned delay
burst
index
2.3
A CE
(Figure of system,
located
come
between
is
disconnected.
on
of
30
for
an
pulse.
CE CONTROL
control
2-1)
the
disk
except
on
active
the
Disconnecting
a
Read
Select
circuit
erasing
2.4
Four Head switch, provided
2.
The so from the
and
recorded
CE SWITCHES
CE
switches
Select
and Step
on
4.
1 Head
Head
Select
that
the
either
two
heads when aligning has
two
positions,
with
the
upper
2.4.2 The
mode
Step Mode Switch
Step Mode
by
determining
CHAPTER 2 MAINTENANCE FEATURES
timing
burst
this
radially
(±5) fJ.sec
all-bits
of
track.
about
pattern
is
adjusted
bits
The
the
exists
and
an
sector
spindle
between
and
presentation
by
the
index
transducer
so the
use
of CE
pulse
is
is
that a time
reference
of
the
PANEL
panel
is
provided
storage
for
the
panel
only when
using
mode.
recorded
located
drive
power
are
system
this
to
independent
input.
normally
the
CE
and
cable,
The CE
data
without
on
back
permit
Interlock
the
places
can
of
the
equipment
limited
operation
of the
The
CE
switches
inoperative
signal
disk
storage
the
machine
examine
the
possibility
using
and
the
cable drive
read
of
information.
are
switch,
the
Select
CE
may
head.
is heads
and
switch
Step Mode
Control
2310
Switch
switch
examine
This
in
use,
to labeled lower
provided
for
writing
controls
switch and
a CE
controls
the
on
the
switch,
switch.
No
information.
the
selection
read
Signals
determines
is
particularly
cartridge.
0 and 1, which
read/write
distance
the
head.
actuator
to
be
CE
panel;
Direction
CE
control
originating
which of
The
correspond
traversed
is
of
heads
useful
switch
stepping
be-
in
by
227
-5984
(9/65)
2.1
Page 16
Electronic Gate
SW5
SW6
10
MIL
SW7
OUT
eee~
I 0
Head
"'.-
. '.' .
Select
..
20
Step
""."
MIL
Mode
.
IN
Direction
FRONT
SW8
CONT
I
Base
Plate
~
~~
~/
:~
CE
& Switches
Panel
Figure
2-1.
the
carriage
switch which by
the
the
Step
2.4.3
The
Direction
riage
motion
forward
ated.
OUT. forward
Step
Control causes center switch
2.2
CE
Panel
for
has
two
positions,
correspond
carriage
Control
Direction
switch
by
or
reverse
The
switch
The
In
position
toward
switch
the
carriage
of
the
data
is
actuated.
and
Switches
each
with
(10
or
switch
Switch
causing
direction
has
the
center
is
to
disk
step
of
labeled
the
distance
20
milli-inches)
is
actuated.
controls
the
carriage
two
positions
causes
of
actuated.
move, each
time
the
actuator.
10
MIL and
to
the
direction
to
while
it
labeled
the
carriage
the
data
The Out
in
r~verse,
the
Step
be
displaced
each
move
is
being
disk
position
Control
The
20
time
of
in
IN and
to
move
when
away
MIL,
car-
a
actu-
the
from
2.4.4
Step
The
Step
providing
effect
movement
three
positions;
neutral.
correspond
movement.
When
step
movement, tinuously direction
tion
switch.
or
20
milli
of
the
Step Mode stepping cal
limits
Control
Control
an
access
Labeling
with
the
switch
at a 15 as
determined
The
-inch
cycle
until
of
travel
Switch
switch
of continuous
the
the
ms
steps
switch.
drive
the
carriage.
on the
continuous
is
positioned
actuator
rate
actuator
as
the
carriage
where
initiates
by
carriage
pulse
to
access
This
step,
single
switch,
in a forward
steps
determined
The
the
is
the
actuator
detent
CaNT
or
single
for
caused
position
in
increments
strikes
motion
circuits
switch
step,
and SING,
stepping
a continuous
to
step
or
reverse
of
the
Direc-
by
the
position
continues
the
mechani-
continues
has and
con-
of
to
by
to
10
this
Page 17
operate
Control
without
switch
position.
When movement, time
the
switch loaded when
and 10
by
Mode
2.5
2.
To
the
so
released.
or
the
respective
switches.
TOOLS AND
5. 1 Standard
properly
foliowing
Small SLT
CE
Oscilloscope,
with
The
following
is
the
switch
the
that
it
20
milli-inch
service
tools:
CE
Tool
Tool
Kit
Indicator
oscilloscope
carriage
removed
is
actuator
is
operated.
will
return
The
direction
positions
TEST
Tools
the
Kit
..•....
Unit
motion,
from
the
positioned
will
move
The
to
the of
step
increment
of
the
EQUIPMENT
equipment,
........
(Not
Type
561S
.......
attachments
or
until
the
Continuous
for a single
one
step
switch
neutral
is
position
carriage
is
determined
Direction
the
CE
(PIN
available
(PIN
are
Step
step
step
each
spring
travel,
and Step
requires
451558) 9/65)
451647)
required:
Lint SLT Alcohol,
Pint
Head
Adapter
2.5.3 The
Branch
following
normally
can
be
obtained
CE
Disk
Cleaning
Disk
Cleaning
The
disk cleaning tridge.
and
The
inserts cleaning positioned
rotated
applied
is
used
manually to
for
Free
Tissue
Board
Jumper
91%
Container
Alignment
•..••..• Office
is a list
located
when
Cartridge. Paddles
Fixture
cartridge
the
disk
operator
the
cartridge
pads
span
on
the
the
disk
unscheduled
. . . . .
Wires
Isopropyl,
. . . . .
Oscilloscope
Tools
of
tools
in
the
Branch
needed.
(PIN
clean~ng
while
it
is
unlatches
into
the
data spindle. while
cleaning
data
surfaces.
maintenance.
and
Office.
2200008)
fixture
encased
the
the
surfaces
The
spindle
solution
(PIN
(PIN
(PIN
(PiN
supplies
(PIN (PiN
provides
within
cartridge
fixture
as
This
which
These
the
so
disk
can
be
is
fixture
2162567)
353796)
2155966)
2200052)
are
tools
2200001)
2108474)
for
car-
door
that
is
Plug-in Plug-in
2.5. 2 Special
The
following
the
equipment
for
systems
Feeler
Gage,
(0.005
Feeler
Gage,
(0.007
Dual Time
Tools
special
and
which
inch)
inch)
Trace
Base
and
Supplies
tools
are
are
available
use
the
disk
non-magnetic
.......
non-magnetic
.......
required
in
the
storage
.
.
.
(P
IN
451648)
(P
IN
451651)
to
service
shipping
drive.
(PIN
2200007)
(PIN
2200057)
group
Disk
Run Out Gage
The
disk
to
determine
disk
by
measuring
tion
present
gage
is
mounted
the
head-arm manually adjustable screw
on
to
determine
gage
are
-"Alternate serial
number.;
run
out the
at
the
assemblies,
rotated
lips
of
the
gage
runout.
described
procedures
00001
(PIN
2200050)*
gage
(Figure
extent
of
warpage
the
amount
outer
edge
on
the
base
between
the
the
gage. A knurled
permits
Procedures
in
Chapter
ar~
contallled
throu<:h
00050.
2-2)
of
vertical
of
the
plate,
so
that
gap
established
adjusting
for
4 •
III
Chapter
enables present
disk.
adjacent
the
disk
adjusting
the
gap
using
7 for
the in
a
deflec-
This
to
can
by
size
the
machines
CE
be
with
727
-!)<)H-!
(!J/I;:;)
2.3
Page 18
Stationary
Lip
Figure
2-2.
Disk Run Out Gage
Adjustable
Lip
Gage
Lips
~
'------
.......
____
Height
Adjustment
Screw
2.4
Page 19
CHAPTER 3 SCHEDULED PREVENTIVE MAINTENANCE PROCEDURES
3.1
APPROACH TO SCHEDULED PREVENTIVE
MAINTENANCE
The
prime
objective
provide
to~er.
should preventive time,
3.
Visual tive rOSion, nections notiCing time
maximum
Ev~ry
assist
in
maintenance
it
is
unnecessary.
1.
1 Visual Inspection
inspection
maintenance
dirt,
wear,
in
wiring
these
later.
3.1. 2 Electronic
Diagnostic
basic tronic potential
also
3.
1. 3 Mechanical Units
The
formed machine ber, maintenance
programs
tools
used
circuits.
and
excellent
three
basic
on
every
are
do not do
intermittent
clean,
on equipment
of any
maintenance
machine
preventive
realizing
availability
maintenance
this
operation
is
the
first
operation.
cracks,
and on
items
may
hardware. minimize
Circuits
and
pulse
in
preventive
All of
these
troubles.
troubleshooting
preventive
maintenance
mechanical
lubricate,
more
than
recommended
that
objective.
cuts
step
to
every
Always look
binds,
and
machine down
checking
maintenance
are
effective
These
tools.
or
electromechanical
and
inspect.
is
operating
factorily.
3.1. 4 Cleanliness
Cleanliness the
mM
When
prOximately 125
heads
the particles between dust
can
and
this
in
head
Do not allow oil
machine.
cannot
2310
Disk
the
heads
and
the
of
dust
the
heads
cause
condition
damage.
Oil
accumulates
Storage
to
surfaces
can
and
the
disk
can
be
overemphasized
Drive.
are
"flying" a
150
microinches
of
the
accumulate
the
disk~
surface
result
in
to
accumulate
dust
clearance
exists
disk.
and
become
The
accumulated
to
become
an
unusaple
anywhere on
and
dirt.
ability
to
the
operation
Unless a
machine
preven-
for
loose
Alertness
are
the
of
in
locating
items
steps
Remem-·
preventive
satis-
in
maintairiing
of
between
Vepy
small
trapped
'scored,
track
Do not
is
cus-
down-
cor-
con-
in
elec-
per-
ap-
the
to
two
are
or
operate
~ess
ner.
replace avoid
3.2
,Details of listed
tenance, chart 2310 Disk is Details
in
safety
3.2.1
1.
2. Use a
.
WARNING: head
and the ture
3.2.2
Scheduled described cants contained
the
analysis
If
the customer's
damage
machine
cannot
machine
to
customer
with
the
be
performed
must
run
cartridge
data.
top
cover
in
with
the
with a CE
SCHEDULED MAINTENANCE PROCEDURES
in
for
defined
on
the
Operation
scheduled
Figure
perform
that
particular
Storage
by
its
adjustments
maintenance
3-1.
During
only
those
Drive
time
interval
and
column of
operations
normal
operations maintenance scheduled
service
Figure
maintenance
of
use
checks
3-1.
practices.
Cleaning
Wrap a paddle and
(PIN
NOTE: four
to
write read/write with alcohol. Use
the
head cleaned not
cleaned
wipe head with
With
ruin a head.
read/write
'will
rust
Lubrication
are
Read/Write
lint-free
dampen
2155966)
Paddle
five
times
second
head,
paddle
and thoroughly wipe the
head with
surface.
off. Any
off
Do
not
fingers.
Do not
head.
and
contaminate
lubrication in
Figures
to
be
applied
in
these
charts.
Heads
wiper
(P
with
91%
is
made
by
lengthwise.
to
support
the
the
dental
Be
very
extraneous
will
damage
dry
wiper.
touch
the
face
Acids
emitted
leave
Do
not blow on
of Machine
requirements
3-1
and
according
/N
2162567)
isopropyl
folding
lint-free
mirror
careful
material
the
of
from
any
residue
the
heads.
for
3-2.
Specified
to
the
disks.
the
instructions
.
removed
any
other
cover
cartridge
scheduled
listed
period.
by
the
customer.
are
Observe
around
alcohol
an
mM
back
of a
face
wiper
dampened
to
inspect
that
all
which
Finally,
read/write
skin
can
on
heads.
the
2310
lubri-
man-
off,
are
main-
on
The
period
found
card
of
each
dirt
etch
face
Mois-
are
un-
to
the
all
a
read!
is
is
of
227-5984
(9/65)
3.1
Page 20
conE
U R
3
5
LOCATION
OPERATION Read/Write
Carriage
Preload Bearing
Deh;!nt Rack
Spindle Assemblt (Magnetic
Air Electronics Duct
Head Load Cam
Head Load Spring Support Pivots
Spindle Center
Drive and Motor Flux
Base Casting Covers
Air Plenum Chamber
Drive Belt Tension
**Drive Motor
Read/write
Sector Pulse
Timing
Filter
Magnet
Voice
Plate
Filter
rail
Cone
and
Heads
Chuc
Coil
Gop
heads
)
*FREQ
4
12
OPERATION
Clean;
Inspect:
Clean
and
inspect
af
axide.
Inspect
head
Clean;
Lubricate:
Clean
carriage Apply a thin film of tissue. Clean: Clean
outer
tissue against it while moving Clean;
Lubricate:
Clean
detent
of
IBM
#9
Access
the
times.
Wipe excess
Clean: Clean
each
dampened with 91% lospropyl Replace
Filter.
Disconnect screw on remove
' Lubricate:
Apply a surface.
Apply Support Pivots.
Apply a light film of any excess
top
air
I ight film of
Lubricate:
one
Lubricate:
Inspect;
Clean
Remove
actuator especially piece
of masking
each
wipe Clean
the
Inspect;
Clean:
Inspect for cleanliness and loose parts.
Test; Replace if necessary: Test plenum chamber air
fi
Iter if necessary.
Check;
Adjust Loosen
three to position screws progressively
Lubricate: Apply
IBM
Check: Check
read/write
according Check:
Check
sector pulse timing using
to procedures of Section
read/write
See Section
leads for
rail with
race
of
the
Rack with
Oil
in
three
carriage
fram
ail
pole
piece
head
plug leads from heads
of
electronics
filter from
drop of
IBM
grease.
if necessary:
motor (Drive Magnet)
for metal
tape
side of flux
voice
coil with dry
motor mounting screws
the
motor to
#6
oil to fill oil cups on
head
to
procedures of
heads for scratches
3.3.2. damage.
lint-free
IBM
Preload Bearing by holding a dry
IBM
equally_spaced places an the
from
of
left
IBM
±9 oil
IBM
particles.
on a
gap.
air
obtain
to
prevent changing
alignment using
tissue
#6
oil.
Remove excess with
the
carriage
Brush
track
000
detent
the
Magnetic
Alcohol.
gate.
side, of
gate.
#22 grease on wear points of Head Laad Cam
at
four points
#22 grease on cone
If
paddle
lint-free
flow as
outlined
the
Sect
ian
CE
4.20.1
and
build
up
and
91% Isopropyl
back
and
(P/N·1018992).'
to
199
and
rack.
Swing
cleaning
with adhesive side exposed, and
and
required
each
4.17.1
disk
back
Chuck
with
and
loosen binding
gate
door downward
of
Head Load Spring
surface.
and
inspect for contamination; is
necessary,
tissue.
Clean
as necessary.
in
Section
allow
the
belt
tension.
the
position of
end
of motor
CE
disk
Cartridge
Cartridge
lint-free
forth.
Place
rack.
three
lint-free
Wipe off
place
4.3.1.
belt
tension spring
the
shaft.
track
095
alcahol.
lint-free
one
drop
'
or four
tissue
head
and
a
Replace
Tighten
plate,
track
according
the
100
* The
preventive
**
Lubric~tian
Figure 3 -1.
maintenance
is
ta
Preventive
Frequency
be
accamplished on
Maintenance
is
determined by machine usage rates computed
50-cycle,
Schedule
3.2
208/220-volt
motors
only.
at
176 hrs-per-month an a single shift basi
Page 21
8 Carriage
Use (thin film)
f2'Detent VUse
(1
Rail
IBM
#6
ail
Rack
IBM
#9
drop in 3 equally spaced places)
ail
o Head
f4\ Head
VUse
f'5\Spindle
V
16\50
V
Figure
227-5984
load Use (thin film)
(one drop
Use
(thin film)
Fi
(Applicable for 50 cps, 220 volt drive motors only)
3-2.
Cam
IBM
#22 grease
load
Spring Support Pivots
IBM
#9
oil
in
Center Cone
IBM
#22 grease
CPS
Drive Motor
II
cups on
each
Lubrication
(9/65)
4 locations)
end of shoft with
Chart
IBM
'6
oi I
3.3
Page 22
Motor Mounting
Plate~---
Motor Mounting Screw
(3)
Belt Tension Drive Motor
Pulley
Flat Drive
Belt
Figure 3 -3.
3.2.3
Drive
structions
adjusting
3.3
Drive
belt
HEAD
Drive
tension contained
screws
AND
DESCRIPTION
3.3.1
Head
particle
surface on disk
an
is
Particle
and
disk
of
of a
air
bearing
rotating.
foreign
disk.
When a particle
the
head
and
face
of
the
disk.
this
and
subsequent bedded the
embed
on
particle
particle.
Harder
in
the
disk
materials,
the
will
Belt
Adjustment
Belt
Tension
is
is
Adjustment
to
be
adjusted
in
Figure
contained
3-1.
in
Figure
according
DISK CARTRIDGE SCRATCH
Damage
damage
disk,
depends
disk
mark
to
Disk
can
be
caused
matter
The
of 125
it
The
gliding
to
is
carried
may
damage
passes
on
such
being
150
be
embedded
which
of
the
the
as
deposited
shoe
of
microinches
into
the
results
head
material
aluminum
surface. A comet-trail
the
path
of
some
The
location
3-3.
by a small
onto
the
head
while
gap
between
into
the
from
over
the
and
size
oxide,
scratch
particles.
to
in-
the
"flies"
sur-
em-
of
the
of
may
3.3.2
A may
write
Particle
la,rge,
cut a groove
head. and a head area
of
the
a
succession
its
face.
or
be
pounded
not
necessarily
machine.
When
burr
may
be
partially trusion height,
3.3.3
Damage result erally the tion head
on it
Non-Particle
to of covered
surface
in
shoe
"flight",
Damage
hard
particle
in
The
disk
being
addressed
embedded
of
0.010
Eventually,
below
below
the
surface
be
formed
embedded
the
gliding
will
scratch
both
head
head-to-disk
by
considering
of
either
curvature
will
result
to
Head
embedded
the
face
data
tracks
to
particle
inch
grooves
this
particle
the
flight
that
of a
of a
head
on
the
head,
in
the
shoe
is
the
disk
Damage
and
disk
interference.
head
or
that
will
in
interference.
(Figure
in
of
the
different will
height
head
the
shoe
are
soon
or
could
on
3-4)
disk
on
0.010 tracks
be
scratches
be
(of
this
another
etched
contacts a particle,
or
the
particle
head
epoxy.
greater
than
If
the
surface.
surfaces
that
disk,
interfere
can
This
can
imperfections,
or
any
imperfec-
with
surface
the
read/
inch
apart
in
the
with
across
dislodged
head)
may
this
pro-
flight
occur
as
be
gen-
on
proper
but
a
a
3.4
Page 23
Typical
be
fingerprints
head
or
disk,
propyl
Alcohol,
atmosphere.
Presence
head
or
disk
salts
which,
build
up to a
the
head.
interference.
A continuous
on
the
head
write
errors
not
followed.
3.3.
4 Disk
examples
or
residue
lint,
of
fingerprints, surface in
most
height
This
condition
surfaces
if
scheduled
Cartridge
of
surface
other
stains
resulting
and
dust
means a deposit cases,
greater
will
than
can
accumulation
may
result maintenance
and
Read/Write
imperfection
on
the
surface
from
misuse
would
of a
of
Iso-
from a contaminated
films,
result
cause
the
flight
of
foreign
in
generating
or
stains
of
oils
deposits
height
in
head-to-disk
material
activity
Head
Damage
on a
and
to
read/
is
of
A
Series
(Figure
If
across disk may grooves Heads
a
head
surface not
3-4)
the
still does
become damaged fly with
Oxide The
makes that to
an
Deposit
distinctive
it
oxide
disk
interference.
preventive
of
Scratches
has a series
face
of
the
with
an
be
present.
not
necessarily
scratched
head
will
not
audible
tingling.
on Heads
color
fairly
easy
is
being
scraped
maintenance
or
Grooves
of
0.010
shoe,
it
embedded
The
during
read
data
of
the
reddish
to
detect.
off a
Heads
should
procedures
Across
inch
has
been
particle
presence
Head
spaced
flown on a
which
of
mean a ruined
normal
use
properly,
brown
Its
presence
disk
surface
be
cleaned
..
grooves
mayor
these
head.
but
a
or
it
will
oxide
may
by
using
mean
head
Scratches
Some
types tically age typical
harmless
to
equipment.
comet
embedded
Some Scratches apart
indicate a head
with a
protrusion
particle
on
of
particle types which
in
the
Disk
Surfaces
scratches
while
One
trail
where
protruding
of
scratches
are
on
head
on
other
type
the
regularly
had
been
its
shoe
pole
epoxy.
disk
types
of
harmful
head
out of
indicate
spaced
used
face,
surfaces
can
result
of
the
the
other
0.010
on
that
or
an
are
prac-
in
scratch
comet
surface.
problems.
inch
surface
embedded
dam­is is
a an
Audible
Tingling
An audible tion
of
head
tial
symptom
dislodged
or
Examine
and
comet
of the
embedded
the
track
pOSitions of occurred. area
should
maintenance
from
tingling
to
disk
and
may
is
smashed
the
heads
trails.
particle
The
head:
be
thoroughly
procedures.
Head and
or
scratching
interference.
not
continue
flat.
and
disk
The
approximate
can
be
the
carriage
cartridge,
cleaned
Disk
Interference
sound
is
This
can
if
the
particle
surface
for
radial
determined
where
the
and
spindle
using
scheduled
an
indica-
be
an
scratches
position
by
noting
tingling
ini­is
227
-5984
(9/65)
3.5
Page 24
ROTATION
......
ROTATION.
,-( 1 .
QS4IIIIIP
Scratch and oxide build-up due to scratches. Replace head-arm assembly.
ROTATION.
Alcohol Residue. Clean gliding surface with 91%
isopropyl alcohol. However never allow
to dry
in
alcohol
areas are fonned. lint-free tissue and a gentle wiping motion.
small pools such that residue
Remove
alcohol, using
..
~
Oxide has accumulated
Replace head-arm assembly.
Finger prints and other oi I like stains. form
an
excellent
transferred to the gliding surface. Complete
removal
of
this contaminate
to resuming
file operation.
means
in
the pole tip
by
which oxide
is
mandatory prior
area.
ROTATION.
These
may
be
ROTATION.
Slight scratches without oxide build-up. Head-ann assembly
Figure 3
-4.
3.6
may
be
used.
Inspection of Read/Write Heads
ROTATION.
Slight oxide build-up. Clean with 91% isopropyl alcohol.
Head-arm assembly
may
be used.
Page 25
4.0
INDEX
CHAPTER
OF
SERVICE CHECKS, ADJUSTMENTS
4 SERVICE CHECKS, ADJUSTMENTS,
AND
REMOVALS
AND
REMOVAL PROCEDURES
Component
Actuator Blower Blower Blower Blower
Assembly Motor Scroll Wheel
Carriage
Bearing Carriage Carriage Cartridge
Cartridge
Switch Cartridge Crash
Stop,
Crash
Stop,
Data
Separator Detent Detent Disk Drive Drive Drive Drive Head
Assembly Rack
Runout
Belt Coil
Magnet
Motor
Arm
Head Load
Assembly
Preload
Rail Subassembly
Assembly
In
Place
Receiver
Front
Rear
Assembly
Assembly
Service
Checks
Figure
Figure
Section
Figure Section Figure
Figure
3-1
3-1
4.2.1,
4.2.2
3-1
4.2.3
3-1
3-1
Cleaning
Figure
Figure
Figure
3-1
3-1
3-1
Adjustment
Section
Section
Section Section Section Section Section Section
Section
Section Section
4.5.
4.
18.
4.18.2
4.10.1
4.10.2
4.21.1
4.7.2
4.7.4
3.2.3
4.
17.
4.8.2
Removal!
Replacement
2
3
1
Section Section Section Section Section
Section Section Section Section
Section
Section Section
Section Section Section Section Section
4.5.1
4. 4.
4.4.4
4.4.3
4.4.2
4.14.1
4.
13.
4.15.1
4.2.3
4.18.1
4.7.1
4.7.3
4.1.1
4.6.2
4.6.1
4.1.
2
4.17.2
1
I
1
Head
Load
Spring
Assembly
Head
Load
Solenoid
Heads
Loaded
Switch
Home Switch
227
-5984
(9/65)
Figure
3-1
Section Section
4.8.3
4.11.
Section
Section
Section
2
Section
4.9.1
.4.8.1
4.8.3
4.11.1
4.
1
Page 26
INDEX OF SERVICE CHECKS, ADJUSTMENTS
AND
REMOVALS (Continued)
Interlock Plenum
Plenum Read/Write
Sector Spindle Tachometer
Tachometer
Rod
4.1
DRIVE MOTOR
4.1.1
1.
Drive
Loosen
motor
2.
Push until
3.
Replace
4.
Adjust cedures
4. 1. 2
1.
Drive
Disconnect
power
2.
Remove
3.
Remove motor motor.
4.
Replace and
3.
4.
1.
3 Spindle
1.
Remove
2.
Remove
securing (Figure provided
in
bottom
assembly.
3.
Lift the spindle bore.
Component
Handle
Air
Filter
Cover
Heads
Transducer
Assembly
Assembly
Extension
Belt
Removal and
three
hex-head
mounting
drive
motor
drive
belt
drive
the
drive
of Section
Motor
leads
box.
drive four
socket-head
to
motor
drive
Adjust
Assembly
drive three
spindle
4-1).
through
of
outer
AND
DRIVE
mounting
plate
to
base
mounting
slips
off
the
belt
by
reversing
belt
tension
3.2.3.
Removal
from
terminal
belt.
See Section
mounting
motor
by
reversing
drive
belt
Removal
belt.
See Section
socket-head
housing
Access
two
pole
to
holes
piece
vertically
Service
Checks
Figure Section
Figure Section
Figure
BELT
Replacement
screws
plate.
plate
horizontally
pulleys.
Steps 1 and
by
following
and
Replacement
strip
4.1.1.
screws
plate
securing
and
tension,
and
4.1.1.
mounting
to
base
plate
mounting
(180°
apart)
of
magnetic
out
of
its
3-1
4.
3.
1
3-1
4.16.1
3-1
securing
2.
pro-
in
ac
drive
remove
steps
Section
1,
3.2.3.
drive
2,
Replacement
screws
screws
is
located
chuck
locating
Cleaning
Figure Section
3-1
3.2.1
WARNING: A housing and the
base-plate
spindle
4.
Replace 2,
WARNING: Tighten evenly
5.
Adjust
track
4.17.1.
4.2
CARTRIDGE ASSEMBLY
4.2.1
Scratches related
symptoms cause
of
1.
Check tion
2.
Check head.
3.
Check Section
4.
Check disk
Section
Section
Section
Section
close
base
since
can
be
destroyed
spindle
and
3.
or
spindle
head-arm
100 on CE
9!lrtridge
on
heads
as
described should
read/write
for
scratches
3.3.4
and
for a series
See
for
oxide
3.3.4
for
audible tinging
interference.
Adjustment
4.
19.
4.17.
4.20.1
4.
12.
fit
exists
plate.
the
Do
accurate
if
assembly
the
three
alignment
assemblies
disk
Service
and/or
in
Section
be
investigated
problems:
on
Figure
of
section
3.3.4
deposited
and
Figure
See Section
Removal!
Replacement
1 Section
Section
Section
1
Section
Section Section Section
2
Section
between
not
pry
the
location
this
is
done.
by
reversing
mounting
will
be
destroyed.
by
alignment
cartridge.
See
Check
disk
data
surface
3.3.
The
to
determine
disk
surfaces.
3-4.
scratches
and
on
3-4.
or
Figure
heads.
resulting
3.3.4.
4.
4.3.2
4.3.
4.
4.20.2
4.1.
4.
4.12.1
the
spindle
spindle
of
screws
Section
following
grooves
3-4.
See
from
19.
1
2
17.2
3
12.
3
off of
the
Steps 1,
with
are
the
See
sec-
across
head
and
4.2
Page 27
Outer
Magnetic
Chuck Assembly Spindle Cone
Access hole
Mounting Screw
Spindle Assembly Mounting Screw
Figure
4.2.2
Examine trails. bedded
track
for
4-1.
Magnetic
Visual
the
The
particle
positions
occurred. thoroughly
cleaned
procedures.
the
Branch
of
the
disk
is
and
is
not
scheduled
Exercise cles
into
care
the
surfaces.
4.2.3
Disk
Spindle
(2)
(3\---~~
Check
and
Spindle Assembly
Inspection
disk
surfaces
approximate
can
be
of
the
The
head
using
Also,
the
Office
disk
accomplished
to
prevent
cartridge
for
radial
determined
carriage
and
the scheduled
disk
cleaning
for
as
preventive
introducing
while
scratches
position
by
where
shroud
should
fixture.
remedial
maintenance.)
inspecting
Height and Run Out Check
and
comet
of
the
noting
the
the
tinging
area
should
maintenance
be
cleaned
(Cleaning
purposes,
foreign
the
parti-
disk
em-
be
using
can
be
manually
by
adjustable
screw
on determine check
for
1.
Remove
2.
Remove
3.
Remove
4.
Remove
5.
Remove
6.
Remove
lips
the
gage
runout.
runout
power
cartridge top the
the
the
bracket.
WARNING: Avoid plenum items
through
in
this
the
area
rotated
of
the
permits
Procedure
is
as
from
cover. disk
guide
air
deflector.
door
opener
dropping
cored
can
cause
between
the
gage. A knurled
adjusting
for
accomplishing
follows:
the
machine.
from
machine.
(Figure
6-1).
along with
screws
hole
in
or
the
damage
gap
established
adjusting
the
gap
its
spacers casting. to
the
size
to a
mounting
into
Loose
machine.
the
The
disk
height
and
run
out
check
determine
allowable
2200050) gage jacent
227-5984
if
limits.
is
(Figure
to
the
(9/65)
the
used
2-2)
head
amount
The
Disk
to
accomplish
is
mounted
ariD
assemblies,
of
warpage
Run Out Gage
on
is
this
the
performed
in a disk
(PIN
check.
base
plate
so
that
the
to
exceeds
This
ad-
disk
7.
S.
Position in
the
guide.
for
mounting Insert After
pushing
the
disk
space
previously
Use
the
the
cartridge
run
tapped
gage.
partially
it
two-thirds
out
gage
occupied
hole
into
on
closest
the
of
the
the
base
by
the
to
the
receiver.
way,
plate,
disk
spindle
open
the
4.3
Page 28
door
manually
tridge
carefully
slides
properly
heads
and
in
9.
After
the
cartridge position lower of tridge
the
the
gage-base,
by
and
cartridge
operating
WARNING: Avoid disk
through
cause
dure
that
10.
Turn carefully on readjust adjusting and the disk
11.
After carefully runout and the
4.2.4
Replacement any
of
1.
The
2. A surface and
3.
An is cannot
4.3
PLENUM
4.3.1
1.
Prepare a test a.
gage.
damage:
follows.
the
the
gage
its
runout
spindle
surface
the
gage.
air
deflector
top
cover
Disk
Cartridge
these
conditions
cartridge
is
causing
embedded
present
be
Plenum
Fold
Be
spindle
to
lip.
the
screw.
can
checking
remove
of a
of
on a
dislodged
Am
Filter
an columns thick.
b.
Tear
off and
and
continue
while
between
the
mouth
is
touches
door
and
the
scratching
Any
scratching
particularly
pulley
determine
If
any
disk
run
The
is
within
be
turned
touching
procedure
the
Replace
first,
last.
Replacement
disk
cartridge
exist:
has
sustained
the
disk
read/write
particle
disk
by
FILTER
Air
gage
as
IBM
card
20 and 60
discard
observing
the
of
the
pushed
the
two
upon
carefully
handle.
the
slowly
that
contact
out
gage
disk
permissible
one
gage
lips.
cartridge,
the
door
then
is
scratched
errors.
or
surface
surface
cleaning.
Flow
Test
follows:
at
column
so
that
one
inserting
that
two
read/write gage. to
the
foremost
cartridge
the
upper
lower
disk
while
of
the
careful
disk
by
does
in
hand.
noise
by
turning
is
in
proper
revolution
is
completed,
then
opener
the
disk
Conditions
is
necessary
mechanical
or
contamination
and
the
40
and
card
is
layer.
the
car-
the
disk
stops,
side
the
car-
revolving
disk
will
the
proce-
Listen
not·
touch
is
heard,
the
height
limits, . if
without
the
disk
bracket
guide,
when
damage.
gouged
particle
again
four
layers
and
at
c.
Use
transparent
that
card
2.
3.
4.3.2
Verify is Place duct handle. the
If
the does
that
removed.
test
which
If
plenum
it
blows
air
flow
not
require
Plenum
blower
gage
is test
filter
off
Air
WARNING: When
certain filter position, particles the tissue
1. Remove
2.
3.
4.4
4.4. 1 Blower
1.
2.
3.
that
the
foam
and
baseplate.
leaks
can
to
be
blown into
plenum
cover
dampened
plenum mounting The Replace
air
nut
filter
air
BLOWER ASSEMBLY
Assembly
Turn
off
all
Disconnect
strip
Remove
securing
blower
located
four
blower
baseplate.
forward
1/2
gate.
4.
The
blower
from
baseplate.
5.
4.4.2
1.
2.
Replace
2,
Remove which
Loosen shaft
3,
and
Blower
is
set
and
blower
4.
Wheel
face-plate
secured
screw
slide
tape
will
remain
is
operating
over
that
nearest
or
is
sufficient
gage
is
will
the
remains
clogged
not
replacement.
Filter
Removal
replacing
rubber
If
this
result
which
the
and
cartridge
with
91%
Isopropyl
cover
which
also
can
be
dropped
filter
by
reversing
Removal
power
to
machine.
motor
in
ac
box.
binding-head
motor
The
blower
inch
for
duct
may
now
be
assembly
Removal
at
inlet
by
three
securing
wheel out
to
secure
flat
half disk
in
and
remain
and
the
plenum
seal
is
seal
is
will
cartridge.
air
by
removing
secures
leads
mounting
mounting
assembly
to
clear
lowered
by
reversing
and
to
blower
screws.
blower
inlet
edges
in
folded
position.
and
disk
of
the
air
valve
cartridge
this
position,
must
be
where
placed,
plenum
and
air
filter
Replacement*
filter,
between
not
in
its
allow
foreign
Also
duct
with
Alcohol.
single
the
filter.
vertically
Steps
and
from
downward.
1,
Replacement*
terminal
screws
bracket
must
be
electronic
vertically
Steps
Replacement
assembly
wheel
to
blower
so
cartridge
receiver
replaced.
make
the
air
proper
clean
lint-free
and
2.
to
moved
away
1,
to
motor
scroll.
4.4
*Altemate
serial
numbers
procedures
11'",
00001 through 00050.
contained
in
Chapter
7 for
machines
with
Page 29
3.
Replace and 2.
4.4.3
1.
Remove
2.
Remove scroll mounting
3.
Replace
and 2.
4.4.4
1.
Remove
2.
Remove
3.
Remove and two motor
4.
Replace and
4.5
ACTUATOR ASSEMBLY
4.5.1
The
entire
bly
may
1.
Shut off cartridge.
2.
Remove
3.
Disconnect tacles cable
4.
Unsolder with a
tate
5.
Remove and note removed. and note moved.
6. Remove load plunger.
7.
Disconnect door
between
guide
blower
Blower
Blower
Actuator
(Figure
Scroll
blower four
securing
bracket.
blower
Motor
blower blower two
binding-head
nuts
mounting
blower
3.
Assembly
4-2)*
carriage
be
removed
all
power
cartridge
read/write
and
remove
receptacles.
home
different
identification.
tachometer
terminal
Unsolder
terminal
retaining
solenoid
the
opener
and
actuator
located
binding-head
securing
wheel
by
Removal
wheel
(Refer
blower
scroll
Removal
wheel
(Refer
scroll
blower
bracket.
motor
Removal
and mount of
as
a unit
to
the
receiver
the
switch
colored
leads
from
leads
from
ring
plunger
adjacent
spring
remove
and
and
attached
shroud.
to
reversing
and
screws
scroll
by
reversing
and
(Refer
screws,
by
reversing
as
machine
head
clamp
leads
grease
from
which
from
which
from
slide
the
the
steps
Replacement
to
Section
on
to
blower
steps
Replacement*
to
Section
to
Section
two
motor
to
steps
and
Replacement
the
actuator
follows:
and
remove
(See
Section
cables
which
and
mark
pencil
terminal
each
the
each
Pivot
pin
pivot
to
the
air
baffle
Remove
actuator
from
secures
lead
voice
lead
pin
cartridge
1
4.4.2).
inside
of
motor
1
4.4.2).
4.4.3).
clamps,
blower
1,
2,
assem-
4.18.1). recep-
the
each
lead
to
facili-
strip
is
coil
is
re-
in
head-
out
of
mounted
the
disk
assembly.
8.
Remove
screws
the
baseplate.
9.
Lift
carriage two dowel with to
the
CA
UTION:
to
terminals
I
coil
after
these
leads
motion
Replace
10. through readjust
4.5.2
Four circuits shows these
tachometer detent directions.
minimize
decelerated
adjustment celerating for a single is
justment seat a new
WARNING: to avoid
plifier
Tachometer
1.
Access
adjustments
to
the
adjustments.
A
static
operation
An
amplifier
A 10
made
for
A 10
provides
in
the
track
shorting
and
Apply the
tachometer
between
2k-ohm
(Figure
the
five
which
secure
drive
pins
the
tachometer
actuator
Ensure
on
,the
replacing
would
resulting
actuator
8.
Check
if
necessary
Adjustments
are
maintain
location
is
carriage
to
milli-inch
is
and
step each
millisecond
rack
location.
Use
Access
power
of
and
dynamic
accomplished
will
dead
oscillations
arrive
made
stopping
increment. A separate
stepping
for
after
Alignment
adjacent
Logic
Static
Balance
to
pins
F2B12 and F2D11 Tachometer 4-3)
located
slotted
in
assembly.
that tachometer
cause
in
damage
assembly
carriage
potentiometers
occur
at
and 20
to
single
timing
carriage
machine amplifier
hex-head
the
actuator
assembly
carriage
assembly
correct
the
actuator.
uncontrolled
to
head
load
(See
accomplished
positioning.
balance
to
for
band
adjustment
a new
milli-inch
calibrate
carriage
mode.
shot
of
Screwdriver
contacts
SLT
cards.
Adjustment
and
output
Balance on
the
mounting
assembly
vertically
mounting
which
leads
assembly
Reversal
carriage
equipment
by
reversing
adjustment
Section
ensure carriage
when
track
the
the
has
Access
4.8.2).
in
the
involved
adjustment
that
is
the
location.
integrator-set
trip
motion
(Access
detent
been
to
the
statically
voltage
by
adjusting
potentiometer
Amplifier
off
the
base
along
is
attached
are
matched
and
voice
of
•.
steps
and
access
Figure
for
of
the
smooth
travel
in
made
to
carriage
level
for
within
limits
adjustment
Ready)
to
correctly
accessed
(P/N
460811)
Access
balance
measured
the
to
2
logic
4-3
both
is
de-
ad-
to
Am-
card.
*Altemate
serial numbers 00001 through 00050,
227
-5984
procedures
(9/65)
are
contained
in
Chapter
7 for
machines
with
4.5
Page 30
DRIVE
MAGNET
CLIP
'--,
DRIVE
MAGNET
CLlP~
........
,
"
........
,
........
........
HOME
SWITCH
ADJUST
SCREW
------',
HOME
SWITCH
NUT
PLATE
DETENT
ASSEMBLY
Figure
4-2.
Actuator
Assembly, Exploded View
CARRIAGE
CARRIAGE
RAI
L
DETENT
RACK
I
.)
,/
/'
HOME
SWITCH
ACTUATOR
/
/
MOUNTING
BASE
\VOICE
COIL
ASSEMBLY
\
~
IiEAD
LOAD
sPmNG
ASSEMBLY
~
~~ , ~PIVOT
""-~ -,
111
/
.,..
- /
..................
>.
TACHOMETER
MAGNET
CLAMP
o;..,L~-
DOOR
OPENER
Page 31
100
Ohm
Dead.Band
Adjustment
Level
100
Ohm 20Mil I
ntegrator
Adjustment
Set
2K
Ohm Tachometer Adjustment
Balance
2K
Ohm
10Mii
I
ntegrator
Adjustment
Set
Access
Logic
Card
(G
Soc
Figure
4-3.
2.
Adjust
across condition.
3.
Measure ground step 2 above.
+0. 65 vdc
Dead
Band
1.
Monitor eter
2.
Adjust fier potentiometer of
the become narrowed,
ket)
Access
the
potentiometer
pins
the
under
maximum
Adjustment
wiper
on
pin
the
dead
by
using
dead
band.
more
causing
Adjustment,
F2Bl2
voltage
the
same
This
voltage
F2D13.
band
the
100-ohm
(Figure
The
positive
---
---
Potentiometer
and
F2Dll
from
balanced
voltage
and
-0.
of
in
the
4-3)
voltage
as
the
actuator
---
---
---
Locations
to
obtain a zero
for a balanced
F2Bl2
or
conditions
should
85
vdc
the
dead
band
power
driver
level,
Dead
to
narrow
on
F2Dl3
the
dead
to
---
----
----
voltage
F2Dll
be
within
minimum.
potentiom-
ampli-
Band
the
width
will
band
is
oscillate.
to
of
---
----
---
---------
----
---
---
-------
---
----
NOTE: On so frequencies condition
by
3.
4.
I
---
---
----
--
- J
---
some
high
that
the higher
may
be
the
frequency
Narrow to (decrease
Continue two tions
the
OScillate,
voltage)
to
full
turns
cease.
CAUTION: An
IOO-ohm ted justment whenever
to
the
level,
extreme
screw
this
H
I
K
L
M
N
systems,
actuator
than
detected
generated
dead
band
and
then
widen
of
the
audible
Dead
wiper-end
must
point
is
the
amplifier
will
begin
200
cycles
audibly
by
the
until
the
widen
until
oscillations
the
dead
band
potentiometer
"click"
Band
potentiometer
position.
be
backed
reached.
--.
20K
Ohm
10ms
Single
Adjustment
to
oscillate
per
second.
by a whine
voice-coil
actuator
the
dead
by
an
after
is
heard
off two
If
the
Timing
Cycle
Shot
gain
will
at
This
caused
motor.
begins
band
cease.
additional
oscilla-
when
the
is
rota-
The
ad-
full
turns
adjustment
be
227
-5984
(9/65)
4.7
Page 32
screw
is
not
backed
pOint
at
the
I
to
bridge
NOTE:
band
should
by
the
potentiometer. corresponds that
can cumstances than
two full
the
most
Coarse
Single Shot)
1.
Apply
operating
2.
Monitor
This
5
milliseconds
applied.
3.
Adjust
Ready
the
(Figure
A fine
20 justments
20
Milli-inch
NOTE: When stepping trol
mode, controlled riage
would
The
direction Switch
located
high voltage end,
resistors
If
the
system
be
narrowed
to
the
be
measured
should
turns
positive
Timing
20K-ohm,
and 10
Adjustment
access
the
the
line
drops
the
duration
signal
4-3)
timing
milli-inch
have
Integrator
the
direction
manually
strike
of
on the CE
Access
highest
the
from
voltage.
drive CE Step
from
after
for
Timing
located
adjustment
been
by
either
travel
off,
or
is
rotated
damage
in
the
amplifier
does
not
oscillate,
as
much
The
narrowest
(most
at
pin
F2D13. Under no
potentiometer
the
wiper-end
of
Access
pulses
of
10
the
the
is
to
Control
Ready signal on
+ L
to
-L
the
access
the
-L
::0.5
milliseconds
Cycle
potentiometer
on
the
access
must Integrator accomplished.
Trip
Level Adjustment
carriage
of
step
must
CEo
Otherwise,
front
or
controlled
Panel.
beyond
could
circuit.
as
will
dead
positive)
setting
containing
Ready
access
switch.
pin
(+3v
to
drive
level
of
logic
be
made
Trip
in
the
be
rear
crash
by
the
this
result
the
dead
be
allowed
band
voltage
cir-
be
more
(10MS
circuits
-3v) about
pulse
Access
Level
CE
continuously
by
G2D04.
is
using
card.
after
the
ad-
con-
the
car-
stops.
Direction
of
the
actuator
when
the
at
one
track
the
next
this
condition, reposition to
achieve
When
this
action
is
NOTE: Non-smooth detenting by
direct
observation operating smoothly and quickly
properly,
carriage
and
track
the
final
condition
very
of
the
that
for
this
moves
arrives
20
milli
the
detent
carriage
track
smooth.
the
detent
detent
it
will
ary.
b.
c.
10
Milli-inch
Readjust
potentiometer
until
be
Measure record the until and measure this
Perform
eter is of voltage with When
should
and properly
the
100-ohm, 20 Mil
the
detent
stationary,
the
dc voltage
this
high voltage
potentiometer
the
detent
then
once again
the
voltage
low voltage
a final
to
ensure
65%
of
the
difference
limits
the
most
determining
be
allowed
reverse
Integrator
directions.
adjusted
by
rotating
clapper
but
displays
in
clapper
limit.
adjustment
that
the
producing
positive
the
to
for
Trip
step
mode
occurs
from
zero
at
zero
velocity
-inches
position
prevails,
action
clapper
the
erratic.
at
pin
voltage
value
extremes,
travel
twenty
Level Adjustment
away. Under
mechanism
only
very
accuracy.
the
can
clapper.
will
appear
does
at
motion
between
to
Integrator
in
one
not
erratic
pin
F2B02 and limit. opposite
is
Once
F2B02 and
of
the
at
erratic
taken
in
both
The
actuator
milli-inch
slightly
detenting
be
move
be
direction appear
Next,
direction
first
potentiom-
pin
the
at
the
velocity
to
will
determined
When
so
station-
Set
to
motions.
turn
smooth,
more,
record
F2B02
extremes
motion
100%.
carriage
the
forward
is
now
steps.
1.
Set
the
actuator
appropriately
the
CE
panel.
2.
Perform drive
20 to pin
3.
Perform
accelerating
a.
4.&
pulse
Mil
Integrator
obtain a
F2B02.
Command forward mode trol
switch
tion of
an
a fine
to
take
setting
initial
setting
width
by Set
value
of +3.9 vdc when
adjustment
drive
pulse
the
actuator
and
backward
by
appropriately
on
the
the
detent
20
milli-inch
the
Step Mode switch on
of
the
accelerating
adjusting the 100-ohm,
potentiometer
measured
of
the
20
width
as
follows:
to
step
in
the
20
setting
CE
Panel.
clapper.
Observe
Proper
steps
by
(Figure
milli-inch
continuously
milli-inch
the
4-3)
at
Step Con-
opera-
operation
1.
Set
appropriately Panel.
2.
Perform drive
Integrator tain a value
F~B02.
3.
Perform accelerating a.
the
actuator
an
pulse
Set
a fine
Command
forward
mode
by
trol
switch
tion
of
to
take
10
setting
initial
width
potentiometer
of +5. 0 vdc when
drive
and
appropriately
the
the
setting
by
adjusting
adjustment
pulse
the
actuator
backward
on
the
CE
detent
clapper.
Mode Switch
width
milli-inch
of
the
accelerating
the
2K-ohm, 10 Mil
(Figure
measured
of
the
10
as
follows:
to
step
in
the
10
setting
Panel.
Observe
Proper
steps
by
on
the
CE
4-3)
to
ob-
at
pin
milli-inch
continuously
milli-
inch
the
Step
Con­opera-
operation
Page 33
of
the
actuator
when
the
carriage
ity
at
one
ity
to
the
next
Under
this
will
reposition
slightly
to accuracy. the
detenting
NOTE: Non-smooth mined
by When move
be
stationary.
b.
c.
direct operating so
smoothly
Readjust Set tion to tions. and
turn direction is
ratic. pin
Perform a final
eter
is
observation
properly,
the
potentiometer
until
the
be
stationary,
Measure
record
the
potentiometer
until
first
smooth,
Once
F2B02 and
to
ensure
65%
of
the
of voltage
wi
th
the
most
When
determining
raige
should
Fine
Timing
(10MS
1.
Apply using carriage inch
2.
Adjust
eter
milliseconds leading G3B03 and the
forward
tor inch
Single Shot)
the
step
(Figure
Access
and
is
now
steps.
Adjustment of
access
drive
CE Step Control switch
forward
mode.
the
20K-ohm,
4-3)
between
edge of
the
Ready
for
this
moves
track
and
arrives
track
10
condition, the
the
carriage
achieve
When
detenting
this
action
final
condition
is
action
of
the
detent
and quickly
that
2K-ohm. 10 Mil
by
rotating
detent
clapper
but
displays
the
dc voltage
this
high voltage
the
detent
and
then
more,
measure
record
adjustment
that
the
difference
limits
producing
positive
the
be
allowed
reverse
properly
directions.
adjusted
Access
pulses
and
backward
Timing
to
provide a time
the
negative-going
the
Access
positive-going
signal
at
step
mode
from
zero
at
zero
milli-inches
detent
only
track
position
prevailS,
very
smooth.
can
the
detent
clapper
it
will
Integrator in
does
erratic
at
limit.
in
the
opposite
clapper
once
again
the
this
low voltage
of
the
voltage
at
between
erratic
value
taken
extremes,
to
travel
for
Ready
to
the
machine
to
step
in
the
Cycle
potentiom­of 14
Drive
pulse
trailing
pin
G2D04.
occurs
veloc-
veloc-
away.
mechanism
very
be
deter-
clapper.
will
appear
one
not
to
direc-
appear
mo-
pin
F2B02
Next,
motion
er-
voltage
at
limit.
potentiom-
pin
F2B02
the
extremes
motion
as
100%.
the
car-
in
both
the
The
actua-
10
milli-
by
the
20
milli-
:1:0.
1
at
pin
edge of
Tachometer
Dynamic cannot tion system
1.
2.
be
for
Step inch eter is
no Stop age
should
balancing
adjusted
carriage
the step Balance
longer
the
from
value.
3.
Step
the
ohm,
Tachometer
other
direction
comes
4. Stop
the voltage value.
5.
Compute voltage and Balance appears
6. Recheck setting 100 ohm, 20 Mil contained initial voltage
7.
Recheck setting 2K-ohm, described initial
voltage
4.6
DRIVE MAGNET
4.6.1
Drive
(Figure
1.
Turn
off
2.
Push
the
3.
Remove which
secures
4. Remove net which bracket.
5.
Slide
magnet
cradle.
Dynamic
be
actuator
mode and
Balance
is
necessary
for
proper,
travel
in
both
dynamically
continuously
adjust
potentiometer
smooth.
actuator
pin
actuator
and
F2B 12
once
measure
to
pin
more,
Balance
until
the
detent
smooth,
actuator
from
the
potentiometer
across
the
by
and
and
pin
F2B12
average
adjust
the
the
designated
20
milli-inch
performing
again
again
to
value of
2K-ohm
until
a fine
Integrator
in
steps
3a,
3b, and
the
10
by
performing
10
Mil
in
steps
setting
setting
contained
milli-inch
a fine
Integrator
3a, 3b, and 3c. Omit
described
AND
COIL
Magnet Removal and
4-2)*
all
power
carriage
screw
the
secures
and clip
the
screw
to
the
forward
from
strap
and clip
magnet
horizontally
Adjustment
when the
smooth
directions.
balanced
in
the
the
2K-ohm,
until
detent
the
F2Dll.
and
turn
potentiometer
action
becomes
measure
F2Dll.
the
balance
Tachometer
this
voltage
pins.
integrator
adjustment
Set
potentiometer
3c.
in
integrator
adjustment
Set
potentiometer
in
Replacement
machine.
as
far
as
top of
clamp
to
magnet.
from
back
to
cradle
back
from
system
detent
The
as
follows:
10
milli­Tachom­action
balance
Record
the
first
erratic.
the
balance
Record
value
trip
for
Omit
steps
trip
for
steps
it
will
the
magnet
of
of
actuator
bracket
opera-
volt-
this
2K-
in
the
be-
this
level
the
the
1 and
level
the
the
1 and 2.
extend.
the
mag-
2.
227-5984
(9/65)
*Altemate
serial
procedures
numbers 00001 through 00050,
are
contained
in
Chapter 7 fOr
machines
with
4.9
Page 34
6.
Replace through
stop on
installation
4.6.2
1.
Turn
2. Remove
3.
Unsolder'voic'e coil
from
4. Remove located
5.
Slide coil
off dowel
CAUTION:
to
terminals
I
Reversal carriage
6.
Replace
4.
4.7
DETENT ASSEMBLY
4.7.1
1.
Disconnect detent coil Mark moval
2.
Remove two securing
base.
3.
Remove away
4.
Replace 2, and tighten (refer
4.7.2
WARNING: fixed
pawl-to-rack
by
controlling
piece
circumstances, electromagnet,
Drive
off
which
Replace
Detent
from
Detent
of
the
the
drive
5.
actuator
Coil Removal and
all
drive
three
inside
horizontally,
pin.
·Ensure on
of
these
motion
drive
Assembly
pin
to
facilitate
detent
detent
detent
3. at
this
to
section
Assembly
The only CE
the
energized
magnet
Ensure
with mounting
ac
and dc
magnet
each
binding the
the
resulting
coil
drive
location
nex-head
carriage
Insert
time.
alignment which
air
loosen
or
pawls
by
that
bracket
power.
(refer
leads
lead
is
head
voice
that
correct
voice
leads
would
by
reversing
magnet
AND
Removal
of
identification.
mounting
assembly
assembly
assembly.
assembly
mounting
Adjust detent
4.7.
2).
Adjustment
adjustment
gap
between
detent.
screws
and
reversing
magnet
before
screws.
Replacement
and note
removed
mounting
coil.
away
coil
after
cause
in
damage to eqUipment.
(see
DETENT RACK*
leads
from
each
to
by
lifting
by
reversing
screws,
Do not,
holding
pole
steps contacts securing
to
section
terminal
•.
from
carriage,
leads
replacement.
uncontrolled
steps
Section
and
Replacement
terminal
lead
prior
screws
carriage
it
assembly
(Figure
required
is
established
clapper
under
the
pieces.
screws
are
2 through
4.6.1).
mounting
upward
steps
but
and
springs,
1
front
the
4.6.1).
.
matched
strip.
to
re-
1,
do
not
4-4)
is
the
pole
any
1.
Energize
2.
Push
registration
the
corresponding
(Figure
3.
Insert
a
gap
between
detent
assembly
energized
4.
Ensure and assembly
have a
5.
Repeat
energizing
O.
with pawl engaged
6.
Tighten assembly. clapper that a 0.006 maintained.
7.
Insert cable used
WARNING:
before
8.
Set
steps. carriage
pawl should now
9.
Move
between pawl and
10. Set steps,
tion of
11.
Turn
12.
Replace
NOTE: The a CE detent section
4.7.3
Removal
1.
Remove
that
pole
sliding-fit
this
006-inch gap
CE
from
to
control
The CE
continuing with
the
CE Step Mode
Using
carriage
theCE
and the
off
Cartridge
assembly
4. 17.
Detent
one of
the
detents.
ledge
of
detent
edge
of
carriage
4-4).
O.
006-inch, non.:..magnetic
clapper
detent
the
piece
to
engage
procedure
its
mounting
Check
and
pole
(±0.001) inch
disk
processor
one
track
Step Mode switch repeat
other
all
power
CPU
Read/Write
installed
has
1.
)
Rack
detent
and
pole
along
registration
pawl
engages
O.
006-inch
is
maintained
the
in
the
electro-magnet
between
in
screws
the
pieces
cartridge,
acceSSing.
disk
the
the
CE Step Control
(0.010
be
engaged with
slightly
rack
steps
detent.
to
signal
cable
head
been
Removal and Replacement*
assembly
gap betWeen'
rack.
gap.
for
the
clapper
rack.
to
air-gap
of
both clearance
and
so
that
cartridge
procedure.
switch
inch). The
to
check
engagement.
8 and 9
the
machine.
on
must
after
each
accomplished.
(refer
,
assembly
mounting
shim
in
piece
and
slide
ledge
until
the
rack.
clapper
while pOSitiOning
The
shim
should
other
detent
by
and
maintaining
and
pole
piece
secure
the
dimension
detents
is
remove
CE
switches
must
be
to
10
mill switch,
the
rack.
for
good
to
20
milli-inch
to
check
processor.
be
adjusted
adjustment
(Refer
to
s'ection
detent
between
to
ensure
CPU
can
inserted
i-inch
move
other
contact
opera-
with of
4.7.1).
against
base
the
the
the
signal
be
detent
the
to
*Alternate
serial
4.10
procedures
numbers 00001 through 00050.
are
contained
in
Chapter
7 for
machines
with
Page 35
Gap
and
(With
Energized)
0.006"
between
Pole
Piece
Magnet
Odd
Detent
0.001")
Clapper
Pawl
Rack
Mounting
Clip
Rack
Electromagnet
Mounting
Screw
( 1)
Figure
4-4.
Detect
2.
3.
Remove and
clip
the
carriage.
Lift
detent
Assembly,
the that
rack
single
secure
Adjustment
binding-head
detent
to
remove
rack
from
Replacement
1.
Place
detent
rack
in
position Position 100 on mark sure
227 -5984
carriage
on
contact
(9/65)
rack
rack.
so
that
is
aligned
Press
between
ca1ib~ated
with
downward on
registration
mounting (Figure
carriage.
shown-in
mark
Figure
for
corresponding
rack
surfaces
screw
4-5)
track
to
en-
on
to
4-5.
detent (refer
2.
Install
clip
to
3.
Replace
4.
Check spacing
to
section
5.
Realign
6. Adjust
4.10.2).
7.
Adjust
rack
and
registration
to
section single secure
detent
detent
and
4.7.4
binding-head
the
assembly
adjustment
detent
4.7.2).
read/write
Crash
Stops
Home Switch
for
detail
mounting
installation.
(refer
by
observing
alignment
heads
(refer
(refer
to
(refer
to
ledge
of
to
with
to
section
section
on
carriage
adjustment).
screw
section
clapper
the
rack
section
4.10.1
4.11.2).
and
4.7.1).
(refer
4.17.1). and
4.11
Page 36
Rack Maunting Clip
Track Mark 100 on Carriage aligned on
Rack
Rack
Carriage
Flush
within
:!:
0.00)"
2. Remove solenoid (pins 7 and 8).
3.
Remove pivot
4.
Remove two binding
5.
solenoid Slide
to
effect
6.
Replace steps (section
to
mounting
solenoid
removal.
the
head
1 through
4.8.2).
leads
from
pin
from
solenoid
head
bracket.
horizontally
load
solenoid
5.
Readjust
terminal
screws
away
by
head
strip
plunger.
securing
from
bracket
reversing load
assembly
TB4
to
Registration Surface
on Detent
Figure
4.
NOTE:
during loosened the
When a calibrated aligned The pressed tration clip
4-5.
7.
4 Detent
Adjustment
replacement
carriage.
detent
with
top
registration
ledge
must
Rack
Detect Rack Removal and Replacement
or
readjusted
mark
the
to
establish a flush
be
tightened
Registration
on Carriage
Rack
Adjustment
of only. The
rack
is
for
corresponding
of
carriage.
the
detent
after
replaced
track
100 on
surfaces
to
secure
Ledge
it
contact
The mounting
alignment.
4.8
HEAD LOAD ASSEMBLY
4.
8.
1 Head Load Solenoid Removal and
1.
Turn
off
all
ac
and dc
power
rack rack is
initially
(section
the
mark
of
detent
the
to
Maunting Screw
is
accomplished
should
never
installed
4.7.3),
carriage
on the
rack.
rack
With
the
screw
detent
rack
Replacement
machine.
is
must regis-
and
~
be
the
be
on
4.8.2
Head Load
WARNING: Do ing
in
machine. insert Failure or
1.
2.
3.
an
disk.
Remove on
machine. Install Power
IBM
to
comply
a CE up
CPU
heads.
NOTE: second
procedure
Read/Write
delay.
to
a.
Observe out.
b.
Shut off
c.
Loosen secure
bracket.
d.
Use
the
per
turn) backwards has
bottomed wards has
not approximately
e.
Tighten adjustment.
4.
Use
masking
in
the
transferred mounting toward
the
Assembly
not
load
heads
When
cartridge
card
between
will
result
signal
cartridge
the
machine and
heads should
If
heads
fail
accomplish
that
solenoid
power
to
the
two binding
the
head
solenoid
to move
in
the out,
approximately
bottomed
0.031
the
two mounting -screws
tape
to
position.
screws
and
solenoid
as
Adjustment
when
heads
in
cable
from
in
machine.
check
to
load,
is
damage
load
disk
out
prior
plug
for
after a 90-
use
(Figure
is
of
to to
connection
loading of
the
head loading:
plunger
has
machine.
head
screws
load
solenoid
adjust
the
solenoid
bracket.
move
0.031
screw
If
the
solenoid
inch.
to
the
(0. 031-inch
forward
solenoid
out, move solenoid
inch.
hold
the
heads
loaded
slide
far
Loosen
the
as
possible.
the
switch
4-6)*
not
rotat-
machine,
loading. heads
and/
following
bottomed
that mounting
or
plunger
back-
If
solenoid
forward
to
secure
switch
switch
backwards
the
4.12
*Alternate procedures are contained
serial numbers
00001 through 00050.
in
Chapter 7 for machines with
Page 37
Heod Load Com Loaded
0.050"
Max
Clearance
Unloaded
Pivot
Plate--~~
Assembly
Figure
4-6.
Head
Looded
Load
Assembly,
Adjustment
Heads-Unloaded
Adjust Screw
Heods-Loaded Switch
WARNING: in
transferred
solenoid
5.
With the
two noid ward loading to
slide
all
the solenoid noid solenoid.
6.
Back and
tighten mounting ward justing
7.
Check head
within
mounting obtained.
8.
Adjust
procedure. a.
Slide against move
If
the
position,
coil
resulting
the
carriage
solenoid
adjusting
until
the
roll
the
way
into
mounting
adjusting
off
the
the
screws
so
that
screw.
clearance
loading
0.031 screws
heads
switch
the
Heads Loaded
48
in
damage
detented
mounting
screw.
pivot
plate
pin
in
the
head
solenoid
the
back
cam
screws
screw
against
solenoid
it
lock
and
will
adjusting
nut.
slide
bear
between
roll
pin.
(±O. 010)
inch.
after
loaded
switch
toward
the
head
load
masking
switch
vdc
will
to
at
screws
Slide
the
contacts
load
until
followers.
and
the
Loosen
the
lightly
the
pivot
This
clearance
Tighten
this
clearance
using
head
load
actuator
tape.
is
be
applied
equipment.
track
000,
and
solenoid
the
cam.
the
cam
Tighten
position
back
screw
the
solenoid
solenoid
against
plate
the
the
following
contact
link
not
held
to
loosen
the
sole-
back-
head-
Continue
moves
the
sole-
of
the
one
turn,
back­the
ad-
and
should
solenoid
has
been
point
and
re-
the
be
b.
c.
CAUTION: hand to is
warm 24 vdc adjustment coil
resulting too hot is
not
9.
Adjust is
excessively
section
10.
Remove
11.
Adjust when
(±O;
the
heads
Tighten
NOTE:
load
Failure
cam
assembly.
Place a 0.005 button
and
toms
out.
Tighten
in
this
position.
Feel
inspect
to
the
is
applied. A defective
will
in
to
grasp
in
proper
the
heads
inch
link.
mounting
the
head
for
overheating.
touch
during
cause
48
excessive and hold, adjustment.
loaded
hot.
(Refer
4.8.3.) power
from
the
heads-unloaded
heads
are
unloaded, a clearance
020)
inch
exists
unloaded
the
requires
locknut
of
roll
to
the
linear
replacement
shim
Move
screws
loaded
normal
vdc to
heating.
the
switch
the
machine.
adjust
between
on
the
secure
ball
of
between
switch
to
secure
solenoid
The
operation
Heads
be
applied
heads
loaded
if
solenoid
to
procedures
screw
the
pivot
head
this
adjustment.
bearings
the
carriage
switch
until
it
coil
solenoid
Loaded
If
the
so
of
plate
load
or
bot-
switch
by
coil
when
Switch
to
the
coil
is
switch
coil
of
that
0.030 and
cam.
head
227 -5984
(9/65)
4.13
Page 38
4.8.3
1.
2.
3.
4.
5.
6.
7.
4.9
4.9.
Heads and
Remove
Unsolder ure lead Remove plate Remove Replace 2, as Power heads inch load Tighten
Adjustment
all
4-6)
and
is
removed.
two
located
heads heads
3,
and
near
as
up
are shim. actuator
mounting
Loaded
ac
and dc
leads
note
binding
underneath
loaded loaded
4.
The
possible machine loaded,
Slide
link
Switch,
at
beads
terminal
switch
to
and
transfer
switch
until
screws.
power
head
switch. switch
the
load
switch
HEAD LOAD SPRING ASSEMBLY*
1 Head
Load
Spring
Assembly
Replacement*
1.
Remove head
2.
Remove
3.
Remove
NOTE: as a complete
4.
Replace reversing
4.10
CRASH STOPS
the
load
spring
pivot spring
The
head
unit
the
steps 1 through
split
assembly
pin.
assembly.
load
and
head
retainer
spring
is
not to
load
spring
Removal,
from
loaded
from
screws
the
switch.
by
should
solenoid.
heads.
switch
and
shim
bottoms
Removal
ring
from
pivot
assembly
be
disassembled.
assembly
3.
Replacement,
the
machine
sWitch
which
from
(Fig-
each
nut
reversing be
positioned
As
soon with a 0.005­toward
out.
one
pin.
is
r:eplaced
by
steps
head
and
side
as
of
4.10.2
Use
Rear
appropriate carriage against
rear
Adjust tighten ance
locknut
exists
Operate then
reverse, clearance stop
when
4.11
HOME SWITCH*
4.11.1
Home Switch (Figure
1.
Remove
2.
Remove
3.
Remove to
mounting
4.
Replace
and
adjust
4.11.2
1.
Home Switch
Use operate on
track
2.
Place a 0.007
carriage and
adjust
the
switch
3.
Check gage
transfer.
Crash
switches
in a reverse
crash
screw
on
so
that a O.
between
carriage,
to
check adjustment carriage
4-2)
all
ac
leads
from
two binding
bracket.
Home Switch
switch
appropriate
carriage'
001.
-inch
actuator
the
home
just
this
adjustment
to
determine
Stop
Adjustment*
on
direction
stop
(near
left
end
003
rear
crash first that
is
maintained
is
detented
Removal
and dc
power
Home Switch
head
by
according
Adjustment
switches
in a reverse
feeler
and
home
switch
transfers.
that
the
CE
to
detent
drive
'of
rear
(±O.
stop
in
forward
the
0.003
on
track
and
from
screws
reversing
to
on
the
gage
switch
adjusting
with a O.
home
switch
Panel
to
operate
on
track
magnet).
crash
stop
001)
inch
clear-
and
carriage.
direction
(±0.001)
at
the
rear
000.
Replacement
machine. terminals. securing
steps
2 and 3
Section
direction
between
CE
4.11.2.
Panel
to
the
pushbutton,
screw
005-inch
will
feeler
not
000
and
and
inch
crash
Switch
to detent
until
4.10.1
Use carriage against
tighten ance
then clearance stop
*AItemate
serial
4.14
Front
appropriate
in a forward
front
crash
Adjust
screw
locknut
exists
between
Operate
carriage
forward,
adjustment
when
carriage
procedures
numbers
00001
Crash
Stop
switches
stop
on
right
so
that a 0.006
front
to
check
is
are
contained
through
Adjustment
on
direction
(near
end
crash
first
in
that
the
is
maintained
detented
in
00050.
the
CE
Panel
to
detent
spindle).
of
front
(±O. 003)
stop
reverse
0.006 at
on
track
Chapter 7 for
and
to
on
track
crash
inch
carriage.
direction,
(±O. 003)
the
front
202.
machines
operate
202
stop and
clear-
and
inch
crash
with
4.12
TACHOMETER EXTENSION
4.12.1
tachometer
The
the
tachometer
the
core
moving
broken
or
Tachometer
Replacement
extension
core
assembly.
the
extension
scarred.
AND
ROD
Extension
(Figure
by
unscrewing
Use
rod
ReIpove
TACHOMETER
Rod
Removal
4-2)*
rod
can
be
the
extreme
because
the
care' the
rod
as
removed
rod
from
when
core
can
follows:
and
from
re-
be
Page 39
1.
Unscrew which in
2.
Remove in
3.
Detatch carriage the and housing
4.
Replace steps
serves
the
carriage
the
carriage
the
home
tachometer
1,
2,
and
remove
as a lock
bracket.
set bracket. rod
by
bracket,
switch
assembly.
and
the
screw
screw
which
unscrewing
and
slide
and out of
extension
3.
home
secures
the
the
switch
to
actuator
retain
the
it
from
the
rod
away
tachometer
rod
by
reversing
the
rod
rod
from
coil
2.
Loosen tachometer
base.
3.
Slide
the
in
the
shield.
4. Tighten justment.
5.
Check
binding
tachometer
the
the
two
set
screws
and
shield
shield
along
the
rod
is
flush with the end of the
the
two
set
screws
the
carriage
does
not
for
prevail
extension
which
to
the
carriage
rod
until
to
friction
as a result
rod
adjustment.
secure
the
secure
to
ensure
the
mounting
groove
tachometer
the
ad-
that
of making
4.12.2
The
tachometer visually the
groove carriage riage
is
justment
NOTE: make
this
1.
Detent
*Altemate
serial
numbers
Tachometer
extension
by
positioning
on
the
rod
end of
the
detented
as
Do
follows:
not
disconnect
at
adjustment.
carriage
procedures
are
00001 through 00050.
Extension Rod Adjustment*
rod
is
to
be
adjusted
the
tachometer
is
flush
tachometer
track
000.
the
to
track
000.
contained
in
with
shield
Perform
rod
Chapter
the
from
7 for
shield end
of
when
the
carriage
machines
the
so the
ad-
that
car-
to
with
4.
12.3
Tachometer Replacement
1.
Remove
2. Remove from
base
3.
Unsolder on
tachometer,
identification.
4.
Remove section
disk
cartridge
cartridge
plate.
tachometer
the
tachometer
4.12.1).
Assembly
(Figure
from
receiver,
cable
and
mark
extension
Removal and
4-2)*
machine.
shroud,
leads
from
each
lead
rod
and
terminals
to
facilitate
(see
spindle
227
-5984
(9/65)
4.15
Page 40
WARNING: Caution the
tachometer
assemblies
5.
Remove
mounting
can
the
base
core
be
two
shield.
6.
Slide
tachometer
base
and
tachometer
7.
Slide
tachometer
of
tachometer
WARNING: Slide
end of
tachometer
not
bend
tachometer
since
they
can
coil
break
assembly.
8.
Replace
the
tachometer steps 2 through section
4.13
4.13.1
1.
Turn remove
2.
Remove at the
base.
3.
Insert carriage preload of avoid
4.12.2.
CARRIAGE RAIL
Carriage
(Figure
off
front
rail
Rail
4-2)*
all
ac
top
baseplate
two
retaining
and
rear
in V -grooves
)
0.100-inch preload
force
the
carriage
misalignment.
must
be
and
extension
damaged
set
screws
which
secure
shield
bracket.
coil
shield.
and
shield
nearest
electrical
within
7, and
Removal
and dc
of
rail.
feeler
spring
on
the
rail,
mounting
exercised
if
dropped.
in
out
of
and
housing
housing
leads
the
coil
assembly
adjust
and
power
cover.
screws,
(These
of
the
gage
and
and
base
in
rod.
These
the
carriage
the
tachometer
carriage
assembly
assembly
the
spindle. back
and
housing
by
according
Replacement
to
the
machine
one
each,
screws
carriage
shim
between
carriage.
slide
the
being
handling
mounting
out
the
Do
and
forth
reversing
to
located retain
mounting
Remove
rail
careful
out
and
the
out to
2.
Remove
3.
Remove
4.
Remove secure
remove
NOTE: When ensure with
registration
mounting
5.
Replace reversing
4.15
4.15.1
drive
magnet.
drive
coil.
two
binding
preload
bearing
bearing
replacing
that
edge
of
preload
surfaces
screws.
carriage
steps 2 through
CARRIAGE SUBASSEMBLY
Carriage
Subassembly
Replacement*
1.
2.
3.
4.
5.
6.
Remove Remove
Loosen clamp plugs Remove
(see
Unsolder which
Remove
carriage
all Drive
binding
to
release
from
tachometer
section
voice
each
three
outrigger
ac
and dc Magnet.
head
4.12.1).
lead
binding
slide.
7.
8.
Remove
Lift
carriage
carriage
carriage
mounting
assembly
WARNING: Caution
read/write
heads
do
removal.
(Refer
head
assembly.
bearing
before
preload
power
head
screw
head
plug.
cables.
extension
coil
leads
is
removed.
head
slide
rail
(see
base.
must
be
not
strike
(Refer
to
to
Section
mounting
spring
to
assembly
bearing
tightening
bearing
4.
Removal
to
(Section
securing
Disconnect
rod
and
note
screws
to
carriage.
section
vertically,
exercised
anything
Section
4.6.2.)
screws
carriage"
in
is
fully
assembly
and
machine.
4.
6.
1.
head
from
terminal
which
4.13.1). away
to
ensure
during
4.6.1.)
which
and
step
engaged
the
by
)
plug
head
carriage
from
secure
Remove
from
that
4,
WARNING: the
carriage
4.
Replace
and
4.14
4.14.1
1.
Remove
*Alternate
serial
4. 16
Misalignment
in
this
step
could
bearings.
carriage
rail
by
reversing
3.
CARRIAGE PRELOAD BEARING ASSEMBLY
Carriage
Removal
procedures
numbers
all
00001
Preload
and
Replacement
ac
and dc
are
contained
through
Bearing
power
00050.
in
Chapter
Assembly
to
the
7 for
damage
steps
2
machine.
machines
with
9.
Replace steps 2 through
10.
Adjust
section
11.
Adjust
section
12.
Perform
riage a.
Check
necessary
b.
Adjust to
carriage
7.
tachometer
4. 12. 2.
head-arm
4.17.1. the following
subassembly
detent
according
front
section
4.10.
subassembly
extension
assemblies
adjustments
has
been
adjustment
to
and
rear
crash
by
reversing
rod
according
according
if
installed:
and
readjust
section
stops
to
a new
4.7.2. according
to
car-
if
Page 41
c.
Adjust
4.11.2.
4.16
READ/WRITE HEADS
4.16.1
The of in tion
4.16.2
The unless causing
Read/Write
Service
the
preventive
Figure
of
the
Read/Write
inspected
it
errors.
Disk
Check
3-1.
causes
is
capable
damage
by:
1.
Persistent head
after
2.
Helical
scratches
scratches
3.
Audible pinging
home
switch
Head
for
maintenance
Refer
to
of
read/write
Head
read/write
of
damaging
by a head
oxide
collection
cleaning.
and
on
that
disk
noises.
according
Service
read/write
schedule
Section
Replacement
head
need
can
0.010 surface.
Check
heads
3.3
for a descrip-
head
damage.
not
disk
surfaces
usually
on the
suspected
inch
spaced
to
section
is a part
described
be
replaced
or
be
detected
radial
2.
Check
electrical
head
to
carriage. exceed 5 ohms. 5
3.
ohms, and/or Check
If
ground carriage
this
replace
head resistance resistance
lead
in
to
baseplate,
connections.
4.17
HEAD-ARM ASSEMBLY
4.17.1
Both recorded
width of
data
with a
720 KC. The element
justment equal sirn
Head-Arm
sides
of
master
this
track
after
clock
of
the
and
amplitudes
al
the
track
tunnel
pattern
track
read/write
both
resistance
This
If
this
read/write
load
spring
from exceeds 5 ohms,
the
drive
Assembly
CE
Cartridge
tracks
(0.005
at
inch)
erasure.
of
all
zeros
is
read
head
heads
must
for
the
envelopes developed by the
from
resistance
resistance
head-arm
assembly.
carriage
coil
cable,
for
breakage
Adjustment*
contain
track
position
is
the
The
at a frequency
by
the
tunnel
for
purposes
be
adjusted
read/write
should not
exceeds
assembly
to
baseplate. check
which
or
loose
accurately
100.
same
as
track
is
erasure
to
the
grounds
The
a
written
of
of
ad-
obtain
If
any of
head
should
NOTE: and
visually
"comet
to
damage
After
the
new
after
the
the
disk
4.16.3
The
resistance should cannot
Follow this'
1.
With
loading
a
*Alternate
serial
numbers
the
above
be
replaced.
Clean
the
inspect
trails"
head
the
head
should
new
with
new
replacement
head
cartridge.
Read/Write
Check
from
be
checked in
be
traced
cartridge
pad
procedures
00001
symptoms
disk
using
the
disk
embedded
head.
be
checked
is
loaded
Head
read/write
the
event
to
any
other
procedure:
out
of
(IBM
card).
are
contained
through
00050.
See
to
the
in
the
surface
and
and
Base
occur,
the
disk
to
particles
Section
proper
for
audible
is
addressed
Plate
head
of
read
source.
machine,
Chapter
7 for
suspected
cleaning
be
certain
are
present
3.3.1.
disk
tinging
Resistance
to
baseplate
errors
load
head
machines
fixture
no
cleaning,
onto
which
on
with
NOTE: (P/N into the scoping ing
Figure
are
The
2200052) preamplifier is
screws
4-7.
shown
The CE
so
that
it
tunnel
erase
the
disk,
pole
tip
during
prope!
on
sweep
adjustment
the
scope
If
a more
slight
envelopes as
shown
If
a
bad
inch), one
signal,
appear
of
on
Head Alignment
is
used
from
Pin
D3B07.
and
adjustment
Oscilloscope
in
will
and
Figure
track
pole
then
is
sweep
tip
slightly
the
4-8.
written
slightly
during
other of
as
shown in View
misalignment
under
one
generated
in
View A,
will
Figure
misalignment
leg
only will
more
or
less
the
scope.
to
connect
of
the
read
screws
Signal-pattern
one-half
above
one-half
the
heads,
leg
than
be
at
exists
see
the
constant
Oscilloscope
the
erase
circuit.
Location
with a
below one
of
is
shown in
slight
leg
revolution
the
other
revolution.
the
signal
B,
Figure
exists,
the
the
other,
different
4-8.
(for
example:
track,
and a
amplitude,
Adapter
winding
Output
head
for
clamp-
displays
eccentricity
of
the
of
leg
of the With
will
appear
4-8.
track
will
and
the
amplitudes
0.004 large will
227
-5984
(9/65)
4.
17
Page 42
Figure
4-7.
Head-Arm
Head Adjust
(2)
Screw
Detent
Assembly
Clamping Screw
Head 1
located
at
Adjustment
Track 100
Head Positioned to read on
CE
Track 100
If
misalignment
inch),
no
Procedures
are
to
be
1.
Torque
pound
2.
Back each coil potted required
3.
Install machine access that location.
4. Allow continuously temperature fore
5.
Scope play 5 ms/cm
40
ms.)
Negative
6.
Insert (P
/N socket Head
signal,
only
for
accomplished
both
head
-inches. off
the
head
head-arm
until
the
head
capsule
the
the
the
the
to
observe
CE
to
load
carriage
even
machine
on
cartridge
detent
for stabilization
adjusting
from
heads.
Pin
(one Synchronize Reference,
the
Head
2200052) for
Select
between
Head
switch.
is
total
(for
noise
will
adjustment
as
follows:
clamping
adjusting
assembly
load
spring
the
head. A
the
lower
heads.
to
track
is
energized
and
cartridge
15
minutes
D3B07.
revolution
the
Pin
Alignment
the
O.
Select
example:
appear
of
head-arm
screws
screws
back
toward just
dental
head.
and
apply
Use
the
CE
100, and
at
to
to
ensure
has
taken
Set
time
base
of
the
oscilloscope
K2B04.
Oscilloscope
head
cable
Head 0
0.100
on
the
to
3.5
and
the
clears
mirror
power
switches
ensure
this
operate
that
place
to
disk
on
plug
with
scope.
assembly
(±1.
push
voice the
is
to
the
track
be-
dis-
is
Adapter
and
the
CE
to
0)
7. Slowly serving noise will
appear.
the
pattern
and
the
NOTE: the
If
spindle, machine, arm
backwards
in
step
2,
assembly
load
spring
bly
spring. tact
with
write
coils.
rack
slightly
using
step
8.
Back when the
scope
alignment
9.
Use
the
steps 2 through
NOTE:
the
If
adjustment
advance
the
scope
only,
then
of View
lobes
the
head
it
will
remove
toward
then
repeat
is
correctly
will
bear
The
head
the
potted
It
will
if
correct
7.
off
the
head
adjustment
display
is
CE
switch
the
detent
of
the
head
pattern.
the
When
the B,
will
be
is
moved
be
necessary
the
CE
the
step
positioned,
on
the
load
capsule
be
necessary
adjustment
adjusting
has
pattern
not
affected.
to
8.
rack
head-arm
adjusting
The
pattern
head
Figure
equal
in
forward,
cartridge,
voice
7.
When
dimple
spring
which
been
completed.
to
select
was
moved
assemblies,
screw
scope
of View
is
properly
4-8
will
amplitude.
too
to
shut
and
coil
as
the
the
lip
of
the
will
not
encases
to
shift
cannot
screw
one-half
ensure
Head
1,
to
while
will
first
show
A,
Figure
aligned,
be
present
far
toward
down
the
push
the described head-arm
of
the
head
arm
assem-
be
in
con-
the
read/
the
detent
be
made
turn
Observe
that
the
head
and
repeat
accomplish
it
will
be
ob-
4-8
4. 18
Page 43
o 5
10
15
20
25
30 35 40
WARNING: head-arm handling surfaces.
or
Caution
assemblies
contamination
must
be
to
prevent
exercised
from
damage
contact
when
from
with
handling
rough
solid
hn
1\/\1
a
~Jl
1~
IVV
V\J
IVV
t
1""1
....
11l
V\
----40ms---
® Initial appearance of master track
Signal
from
one leg
of
Tunnel
Erase
Pole Tip
10
0
5
15
20
25~0
;
lJ\I
......
I~
® Master track display
Figure
4-8.
Signal
40ms
"
for
properly adjusted head
Patterns for
Head
{
nn
V\J\
100
/
~
__
..
~1
1
/
~
IVV
Signal othe Tunn Pole
3~40
-11
D~
f~llI
"-
·1
Amplitudes
"
Alignment
Adjustment
from
r leg of
el Erase Tip
Equal
4.
Place
fingers flex-gimble head
be
lifted
5.
Replace
Readjust
at
track
4.18
CARTRIDGE RECEIVER*
4.18.1
1.
2.
3.
4.
5.
WARNING: receiver assembly
Cartridge
Remove Remove
receiver
Remove
ends
of Position remove rods
to rods
free. Remove receiver
from
springs
horizontally
out.
head
by
head
100
according
all
ac
tension
and
interlock
the
two
cartridge
cartridge
cotter
side
guides.
the
two
pivots.
Exercise
machine
and
disrupting
on
the
arm
or
toward
reversing
arm
assembly
Receiver
and
dc
power
spring
tension
load
receiver
pins
that
Slip
socket-head
care
to
avoid
the
only.
head
assembly.
spindle
steps 1 through
with
to
Section
Removal
from
that
attaches
assembly.
springs
rods.
handle
secure
in
detent
the
cartridge
shoulder
lifting
striking
cartridge
the
adjustment.
Do not
until
CE
cartridge
4.17.1.
and
Replacement
the
machine.
to
located
down, and
screws
cartridge
the
grasp
Slide
head
can
4.
cartridge
at
the
load
load
detent
the
at
necessary home
switch
extension
4.
17. 2
1.
Loosen sufficiently
plug
2.
Remove
near
3.
Loosen
this
227-5984
(9/65)
to
readjust
(section
rod
(section
Head-Arm
Replacement
binding
from
plastic
head
time.
to
cable
head
outrigger
Assembly
remove
leads
clamp
the
4.11.2),
4.12.2).
head
screw
leading
from
but
crash
Removal
head
to
head
slide
do
stops
(section
and
tachometer
and
in
head
plug.
Remove
electronics
lead
on
carriage.
not
remove
plug
clip
head
4.10),
clamp
head
gate.
located
at
6.
Lift
the
cartridge
7.
Replace steps 2 through
8.
Check cribed solutely
4.18.2
NOTE:
be
completed
cartridge
a
gage
the
cartridge
is
made,
*Alternate
serial
numbers 00001 through 00050.
the
the
in
necessary.
Cartridge
The
cartridge
prior
interlocks.
for
adjusting
it
should
procedures
cartridge
section
receiver.
receiver
cartridge
6.
4.
Receiver
receiver
to
attempting
Any
the
not
be
are
contained
from
receiver
receiver
18.
1.
Readjust
Adjustment
adjustment
an
cartridge
side-to-side
After
this
changed
in
Chapter
unless
machine.
by
reversing
adjustments
only
(Figure
must
adjustment
serves
position
adjustment
7 for
as
trouble
machines
if
of
des-
ab-
4-9)*
of
with
4.19
Page 44
1.-
2.288"
Reference
4-9.
Figure
is
suspected.
as
follows:
1.
Loosen
located
so
2. With in
shoulder
of
the
secure
4.
18.3
NOTE: adjusted; standing
ing
procedure:
tion
can
1.
Insert action receiver
2.
Verify fully
cartridge anywhere
Cartridge
Adjustment
both on
that
receiver
the
front
its
preferred
screws
cartridge
the
Cartridge
The
cartridge
however,
in
front
be
accomplished
cartridge
of
the handle
that
seated
is except
Receiver
socket-head
the
pivots
is
free
of
the
position,
until
receiver
adjustment.
In
Place
in
place
its
function
of
machine
(A
quick
check
in
receiver
cartridge
is
raised.
switch
on
transfers
its
rest
not touching
on
its
Adjustment
is
to
be
accomplished
shoulder
of
the
cartridge
to
move
cartridge
screws
slightly.
receiver
tighten the two
they
just
contact
pivots.
This
Switch Adjustment
switch cannot
may
be
checked
while using
of the switch
by
step
4.)
and
observe
in
place
switch
when
cartridge
pins.
operating
the
Ensure
switch
end.
<t.
receiver
located
surfaces will
be
the
follow-
opera-
as
that
lever
Receiver
5.000
:I:
0.010"
by
the
the
is
the
t
3.
Use five
shoulder of fers
the
cartridge.
before
mM
of
pin.
4.
With
the
cartridge
place
by
the
ridge
in
place, cartridge see
up and down with
if
the
transferred
affected. The switch
4.19
INTERLOCKS
4.
19. 1 Handle and (Figure
The
NOTE:
4.
18.2)
adjustment ary
posts
of
the receiver. removed the
Handle Stop
Handle Stop
cartridge
must
be
of
located
cartridge
The
to
accomplish
Screw
the
The. handle stop a
cartridge
parallel
0.30 screw
1.
Remove
is
in
with
the
(±O.
015) inch. Adjustment of
is
accomplished
the
assembly.
a.
Remove secure
b.
Remove
from
terminal
location
2.
Install
3.
Loosen handle stop
CE
handle stop
parallel
0.030
4. Tighten made
with
(±0.05)
the
on
the
cards
the
closest
Verify
cartridge
interlock
move
Interlock
4-10)*
receiver
completed
cartridge on
the
before
receiver
Screw
and
Adjustment
screw
place, stationary
interlock
the
two
bracket
wire
connections
to
facilitate
cartridge
screw
the
stationary
inch.
locknut
handle
as
shims
rest
is
fully
receiver
latch
the
condition of
must
Adjustment
prior
interlocks.
base
it
is
fully
interlock
interlock
latch
must
be
the
handle guide
as
follows:
handle and
flat-head
to
base
block
TB6.
in
machine.
screw
so
that
to
secure
stop
screw.
between
pin
and
that
the
switch
seated
handle locked
to
secure
handle
end
moderate
the
remain
transferred.
adjustments
to
attempting
plate
prevent
inserted
magnet
adjustments
screw
clearance.
adjusted
risers
posts
within
the
handle
bracket
screws
plate.
at
pins
Mark
reassembly.
locknut and
handle
safety
the
risers
posts
final
the
the
bottom
trans-
on
the
in
the
cart-
of
the
force
switch
(section
an
Two
station-
lowering
into
the
must
for
so
that,when
will
be
stop
which
3 and 4
each
pin
adjust
are
within
adjustment
rest
to
is
be
the
4.20
*Altemate
serial
procedures
numbers 00001 through 00050.
are
contained
in
Chapter
7 for
machines
with
Page 45
o Handle Stop Screw Adjustment
Disk Cartridge
Receiver Handle
Handle Parallel to Cartridge
within
·0.060"(±
-----,
0.030")
o
latch
Screw
Clearance
Lock
Nut
Adjustment
o Latch Switch Adjustment
Latch Switch Transfers
0.020"
with
Latch to
(Max)
Shank
lacknut
(2)
Stop Screw
(2)
o Interlock
0.040" (±
Overtravel
Clear~nce
0.010") latching
-----
.........
___
M~gnet
Adjustment
Latch Screw
Latch Assembly
Bracket
'?'---4Y'-'
r--
Switch Mounting
Screws
(2)
Figure
4-10.
Handle
and
227
-5984
(9/65)
........
..--
__
-\\-
......
__
____
Latch Switch Assembly
Interlock
Adjustment
.... '-___
=:-----Latch
-t--
Nutplate
Receiver Handle
Screw
Bracket
_____
Interlock Magnet Assembly
Receiver Handle
Latch Assembly
...J
'-----
Interlock Magnet
Mounting Screws
(2)
4.21
Page 46
Latch
Figure
Screw
4-10)
Clearance
Adjustment
(View
B,
screw
when a
applied.
minimum
of 5
grams
force
is
NOTE: must (See
1.
The
interlock
be
removed
step 1 above.)
Fully
rotate
to
accomplish
handle
position.
2.
Adjust
3. latching face latch. tain
seat Determine
into
of
this
the
the
Adjust
interlock
the
square-hole
that
0.040
clearance
screw
latch
clearance.
4. Tighten locknut on has
been
made.
Latch
Switch
1.
Rotate to
NOTE: The
with
brown
switch
Adjustment
handle
to
fully engage the
shoulder
collar
of
the
is
in
transferred
fully engaged.
2.
Place
three
IBM
latch
screw
and
latch.
still
transfers.
handle and
to
the
latch
(±O.
exists
and
upper
screw
latch
screw
(View C,
the
Cartridge
latch.
of
the
red
switch
position
card
shims
Determine
bracket
this
Cartridge
screw
notch of
010)-inch
between
assembly
adjustment.
In
so
that
the
overtravel
the
edge of notch on
as
necessary
after
adjustment
Figure.4-10)
In
Place
button
will
body
to
denote
when
the
latch
between
shank
that
Place
it
will
latch.
flat
sur-
to
ob-
position
be
flush that
switch
is
of
the
NOTE: Hold ientation gravity
Whe~
switch with
latch
6.
while
on
the
the
latch
should
the
head
sheet-metal
Reassemble
assembly mounting nections
Interlock
Magnet Adjustment (View D,
Adjustment of
to
satisfy
two conditions which
a.
The
parallel
b.
When at
the
over-travel
NOTE: manually
Energizing
attracting
Procedures
as
follows:
assembly
in
accomplishing
latch
will
rotates
transfer
of
latch
away
while
screw
thickness.
the
interlock
to
the
baseplate
screws
at
the
long
the
latch
pins
3 and 4 on
interlock
pole
to
the
magnet
screw
of
the
the
for
adjusting
and
face
surface
O.
magnet
latch.
the
normal
this
distroy
from
latch
by
handle and
by
restoring
magnet
of
the
is
energized,
must
040-inch.
may
the
vertical
check.
the
measurement.
the
latch
is
still
at
least
replacing
the
terminal
is
accomplished
are
as
follows:
magnet
of
the
latch.
occur
be
latch
or-
Otherwise,
screw,
engaged
50%
of
the
bracket
the
wire
con-
block
TB6.
Figure
4-10)
must
unlatching
with an
simulated
switch
are
the
two
be
by
NOTE: The
located
Transfer at audible
3.
the
switch
Loosen can that still half
0.020 of
click
be
switch
engaged with
the
switch
4.
Tighten subsequent
been
accomplished.
5.
Check transferring
latch
into
4.'2.'2.
switch
the
should
inch
(max. ) from
switch terminals, which
occurs
switch
screws
repositioned)
will open.
thickness
opens.
latch
switch
slippage
that
the
light
the
switch
contact
with
transfer
may
be
or
by
when switch
slightly
and
Verify
the
latch
of
the
screws
after
latch
and then
the
shank of
checked
listening
operate
screw
latch,
securely
this
spring
shank of
with
the
latch
electrically
for
the
transfers.
{so
that
switch
the
latch
that
the
latch
by
at
at
the
time
to
adjustment
succeeds pulling
the
latch
latch
screw.
so
is
least
prevent
has
in
the
1.
Loosen to ciently
but
2.
Manually
pole
so
3.
Hold net
by
Cartridge
4.20
4.20.1
1.
Remove transducer
*Altemate
serial
the
two
the
interlock
so
that
will
maintain
rotate
face
of
the
that
its
long-pole
latch
against
so
that
latch
0.040
(±O.
In
SECTOR TRANSDUCER*
Sector (Figure
Transducer
4-11)
CPU
lock
procedures
numbers
00001 through 00050,
screws
which
bracket.
magnet
magnet,
its
the
assembly
position
latch
and
face
the
magnet,
clears
the
010) inch, with
Place
(raised)
Index
signal
cable
screw
enough
are
contained
in
secure
Loosen
if
t6
contact
rotate
is
parallel
head
the
position.
Timing
from
so
Chapter
magnet
screws
can
be
not
disturbed.
the
the
to
and
position
of
latch
handle
Adjustment
machine.
that
transducer
7 for
machines
suffi-
moved,
long-
magnet
the
latch.
mag-
screw
in
the
Loosen
with
Page 47
Timing Pulse
CE
Track 095
Head 00
CE
Track 095
Head
01
1-30flsec~4J
Figure
4-11.
Sector
can
be
positioned
still
locked
exerted
2.
Install
3.
Power
4. Using CE
5. Using a CE scoping reference
Observe
6.
to The pulse
the
delay
by CE up
pin
peak
to
the
the
- 5 flsec -
Transducer
by
sufficiently
the
tension
Cartridge.
the
machine
panel,
access oscilloscope, D3B07.
on
pin
K2B04.
time
delay
of
the
timing
from
the
timing
I
I III I
lL
I--
~
I V
I
If
---
I..
../
Index
Timing
the
adjusting
to
overcome
spring.
so
that
carriage
read
Synchronize
from
pulse
leading
pulse
edge of
should
10
flsec (Appro
Iffil
urn
VV
~I
~
,
III
+5
flsec
Range of acceptable
adjustment
Adjustment
for
screw,
the
heads
will
to
track
track
095
the
negative
referenqe
on
be
pulse
track
095.
the
reference
30 (±5)(J.s.
x)
both heads
but
is
force
load.
095.
by
NOTE:
bits
pattern
7.
Determine of that a time both
8.
Use the time crease decrease justing
The
timing
by
the
correction
read/write
the
transducer
transducer
delay.
the
the
screw
pulse
precedes
10(J.s.
the
magnitude
to
be
made
delay
of 30 (±5)(J.s
heads.
adjusting
to
increase
Turn
the
screw
time
delay
and
time
delay. One
provides a change
the
burst
and
direction
in
pulse
will
screw
or
decrease
clockwise
(+
timing
prevail
to
position
the
to
counterclockwise
turn
of
the
in
time
of
all
or
for
in-
to
ad-
delay
-)
so
227
-5984
(9/65)
4.23
Page 48
of 78fiS. while
making
NOTE: this is
9.
10.
4.20.2
Some
adjustment.
to
be
used
Power ridge
and secure Repeat and
readjust
Sector
down
the steps 1 through 7 to
Replacement
1.
Remove
2.
Remove
3.
Back
off
4.
Remove clamp
to
5.
Remove
6.
Remove transducer
7.
Lift
transducer
baseplate.
8.
Replace
4
through
9.
Insert
CE
adjustment
4.21
DATA SEPARATOR
4.21. 1 Data The
data
separator
various
signal
circuit
in
time
Observe
jitter
the
this
adjustment.
will
The
mean
be
as a reference
the
machine,
tighten
the
adjustment.
according
Transducer
all
ac
and
dc
cartridge.
adjusting
two
screws
binding
head
transducer
transducer
single
bracket
cable
binding
to
vertically
sector
transducer
7. cartridge
and
according
Separator
Adjustment
circuit
tolerances
coincidence
scope
pattern
experienced
timing
setting.
remove
transducer
check
to
step 8 if
Removal
power
from
two
screws
bracket.
from
head
screw
baseplate.
to
remove
by
check
to
Section
is
adjusted
to
place
with
data
(Figure
in
making
pulse
position
the
CE
lock
screw
the
adjustment
required.
and
machine.
or
three
turns.
securing
transducer.
securing
from
reversing
Index
Timing
4.20.1.
(Figure
an
4-12)
to
allow
electronic
bits. A gate
cart-
to
cable
steps
for
4-11)
gate
signal
is
formed
separator Data quency variable
justed
separate
card
information
signal. A 5K-ohm
600-nanosecond
to
achieve
The
process
oscilloscope 600-nanosecond signal. simpler,
from
justment
1.
2. Using
To
input
the
write
is
Set
up
the
a.
Adjust
b.
Adj
c.
Provide
SLT
to
D2J10, and
D2J09.
make
accomplished
ust
This oscillator fier.
3.
Connect grounds
H3B07 the
oscillator
4.
Connect
external oscilloscope
5.
Connect output display Figure Adjust
the
pin
the
4-12.
the
separator
Data
Gate
the
leading
shown
in
in
the
logiC
to
separate
from
the
this
purpose.
of
adjustment
traces
signle-shot
trace
stability
to
the
data
oscillator
OSCilloscope.
time
base
vertical
for
gain
external
jumpers,
connect
connects
test
point
tothe
to
any
CPU
clock
to
feed
signal
synchronization
to
Read
other
lead
C2B05.
dual
5K-ohm card pulse
Adjust
waveform
potentiometer
so
that
is
1040 (±20)
edge of the
Figure
4-12.
circuits
Read
Clock
composite
potentiometer
single-shot
involves
for
the
gate
signal
and
separator
test-point
in
the
following
for
200
nanoseconds/cm.
for
1. 0 v /
synchronization.
connect
Test
the
Test
Point output input
point
on
D3D08.
gate
and
to
the
read
Clock
output
to
the
600-nanosecond
synchronization
pattern
the
trailing
nanoseconds
Read
Clock
of
the
and
Read
double
in
circuit
displaying
output
of
and triggering is
received
outputs.
manner:
cm.
Point
H3B13
from
write
of
read
the
write amplifier.
input
pin C2B03.
shown
on
the
edge
pulse
data
fre-
the
is
ad-
the
the
Ad-
H3B05
to
ampli-
This
on
the
to
in
data
of
the
as
clock
from
4.24
Page 49
Read
Pin
Clock
C2J
12
Data Pin
Gate
C2B05
1-<1J---1040
-4-----
(±20)
NS----..
1.8
0.1) Volt
t
Data Separator 600
~;'~==~_
----------
-------------
--
-------------
-----------
-------------
-------------
---------------
---------------
-
---
idii,m,",
-------
5 K Ohm
NS
D
E F
G
H
I
J
K
L
M
N
Single Shot
Figure
4-12.
Data
Separator
227-5984
(9/65)
Adjustment
4.25
Page 50
5.1
POWER REQUIREMENTS
All
power
required
by
individual
disk
storage
drives
is
obtained
from
system
control
circuits
(Figure
5-1).
Those
machines
which
are
installed
within a
stand
alone
enclosure
(I/O
Unit)
are
connected
to
power
supply
circuits
which
are
an
integral
part
of
the
I/O
Unit. Although
internal
power
supply
circuits
may
vary
for
different
system
applications,
the
input
power
requirements
for
each
disk
storage
drive
is
the
same.
Details
of
power
supply
attachment
cir-
cuits
for
a given
system
application
are
covered
in
the
manual
of
instruction
for
the
respective
system.
5.1.1
AC
Input Supply
Power
Three
versions
of
the
Disk
Storage
Drive
contain
the
following
type
primary
ac
power
inputs
(Figure
5-2):
Internal
circuits
of
the
AC
box
located
on
the
front
of
the
machine
receive
ac
input
power
and
distribute
it
to
machine
components.
5.
1. 2 DC
Input Supply
Power
DC
input
power
requirements
for
the
Disk
Storage
Drive
are
contained
in
Figure
5-3.
DC
power
is
re-
ceived
by
the
machine
at
TBllocated
on
the
base
plate
at
the
rear
of
the
machine
from
where
it
is
distributed
to
machine
components.
Machine
Version
Use
Voltage
(ac) Tolerance
Type
I
Blower 115
:1:10%
Disk Drive 115
:1:10%
Type
II
Blower
208/230
:1:10%
Disk Drive
208/230
:1:10%
Type
III
Blower
208/220
:1:10%
Disk Drive
208/220
:1:)0%
CHAPTER 5 POWER
SUPPLY
Figure
5-1
Power Lines
Interface
5.2
POWER SEQUENCING
5.2.1
Power
On Sequence
All dc
voltages
must
be
at
the
specified
levels
before
ac
power
is
applied
to
the
drive
motor;
Blower
power
must
be
applied
when dc
is
on.
5.
2.2
Power
Off Sequence
Ac power
to
spindle
drive
motor
is
removed
before
removing
dc
power
to
machine.
5.3
POWER LINE INTERFACE
5.3.
1 Input
Power
Lines
to
Disk
Storage
Drive
Input
power
lines
to
the
Disk
Storage
Drive
are
shown
in
Figure
5-1.
Phase Frequency (CPS)
Current
Single
60:1:
1/2
Single 60:1:
1/2
3 Amp,
Start/1
Amp,
Run
W Amp,
Start/1.S
Amp,
Run
Single
60:1:
1/2
Single
60:1:
1/2
2 Amp,
Start/O.S
Amp,
Run
7.5 Amp,
Start/0.8
Amp,
Run
Single 50:1:
1/2
Single
50:1:
1/2
2 Amp,
Start/O.S
Amp,
Run
7.5
Amp,
Start/0.8
Amp,
Run
NOTE: A switch
located
on
the
rear
of
the
machine
is
attached
to
two terminals
and
is
used
to
control
the
disk drive motor by opening
and
closing a 4B-vdc
interlock
line.
The blower should
be
on whenever dc power
is
applied
to
the
2310.
~
Figure
5-2.
Primary AC Power Inputs
227-5984
(9/65)
5.1
Page 51
Use
Signal Lines Signal Lines Control Circuits
Control ond
Interlock
NOTE: Storage Drive, applied
+48 vdc power voltages being present.
Figure
Circuits
To
pre~ent
to
and
5-3.
DC Power Inputs
the removed from must
Voltage
(dc) Tolerance
-3V +3V +6V
+48V
damage
to
+3
vdc,
-3
never
be
:1:5% :1:5% :1:5%
:I:
B"k
internal circuits of
vdc,
and
file
+ 6 vdc pawer
at
the
same
without
the
applied
all
Current
0.3
0.3
0.4 3;OAmp
the
2310 Disk
must time. other dc
The
Amp Amp Amp
be
5.2
Page 52
6.1
GENERAL
This
chapter
trations
of
consists
the
Disk
of
general
Storage
arrangement
Drive
which show
illus­equip-
ment
locations
support
the
manual and
plishing
within the
procedures
serve
maintenance
CHAPTER
machine.
described
as
an
aid
operations.
in
to
6 LOCATIONS
These
other
chapters
the
CE
illustrations
of
for
accom-
227-5984
(9/65)
6.1
Page 53
Electronic
Gote
Assembly
,
I
~
Cover
Cover
Receiver
Cartridge
Cartridge
Door
Cartridge Guide
Opener
Pin
Motor Assembly
Fio;nlre
6-1
Disk Stota-<e
Drive,
Head
Load
Solenoid
Carriage
Detent
Assembly
Arranl(ement
Drive Motor
of
Components
Motor Drive
Pulley
~~-:i-
-~
- ,
J";;::::=-"':-",----:;--AC
Seal
Plenum Plenum
- Spindle Drive
Pulley
" - Drive Belt
Fi
Iter
Cover
Receiver
Handle
Sector Transducer
Transducer
Adjust Screw
Box
6.2
Page 54
_~1
__
4
__ ~ _______ 3 ______
~
________
2
________
~
__
~
Interlock &
Tachometer
Cable
Transducer
100
Ohm
20 Mil
Integrator Set Adjustment
100 Ohm
Level Dead Band
Adjustment
CE
Switch
& Head Load
Cable
Cable
M
CPU
Cable
I"'"
-,
I I
I I
. I
I I
I
TS
I
I I
I I
I I
C
I I
Line Driver
2 CPU
& Term
Data
Separator
: I
L_J
Read Amplifier
Write Driver
F
G
r-
-,
I I
I I
H
I I
I
p7
~
1.4
MC
Oscillator
& Trigger
& Preamplifier
Line
Cable
Driver &
1
Term
r-
-,
I I
I I
I I
I Tl I
I I
I I
I I
I I
L_J
SK
Ohm
600ns
Single Shot
Adjustment
2K Ohm
Tacl,ometer Adjustment
2K
Ohm
I
ntegrator
Adjustment
Balance
10
Mil
Set
I I
I I
I
I
__
J
K
r--,
I I
I I
L
I :
I
TS
I
I :
I I
I I
L_J
N
Voltage
Power
Interlock
Transducer
Regulator
r--'
I
I
I
I
1T4
I
I
I
I
I
I
L_
48 v Connector
Figure
6-2.
Arrangement
227
-5984
(9/65)
of
SLT Cards
in
Electronic
Gate
-3, Gnd
+3,
+6
and
Connector
DC
6.3
Page 55
Ground
GI
Ground
G2
Notes: X
Figure
Terminal
Sw
2 - Top,
6-3.
AC Box, Location
Blk
Sw
1 - Under
of
Sw
2
Components
Timing Motor
l4-HiI------
---
Motor Relay
317485 Terminal
(2)
Blk
6.4
Page 56
7.1
PURPOSE OF
This
supplement
which
are
used
chines
This located as
containing
supplement
in
asterisk
other
applicable this
chapter.
7.2
ALTERNATE
7.2.1
Two in
Identification
different
the
field. functionally, required chines serial plate,
for
can
numbers
below
Machines
through
which
this
00050,
are
maintained chapter. Machines
and
upward,
cribed
7.
Special for
00050
Feeler
Feeler
Head
Disk
The to by present
in
other
2.2
Special
tools,
machines
are
Gage,
Gage,
Alignment
Run
Out Gage
Disk
Run
determine
measuring
at
as
SUPPLEMENT
provides
to
maintain
serial
is
supported
chapters
and footnote
to
the
alternate
MAINTENANCE FEATURES
designs
Although both
separate
various
be
identified
stamped
the
drive
with low
contain
with
high
are
maintained
chapters.
Tools
which
containing
follows:
non-magnetic
non-magnetic
Oscilloscope
(PiN
Out Gage
the
extent
the
amount
the
outer
edge
alternate
Disk
numbers
of
the
for
machine
procedures
of
Machines
of
the
disk
machines
maintenance
mechanical
by
high
on
the
magnet.
order differences
by
instructions
order
by
are a part
serial
(0.002
(0.005
Adapter
2200002)
(Figure
of
warpage
of
vertical
of the
CHAPTER 7 SUPPLEMENT
instructions
Storage
00001
by
baseline
manual
Drive
through
information
which
contain
ma-
00050.
differences
storage
are
instructions
assemblies.
order
edge of
serial
numbers,
in
described
serial
numbers,
instructions
of
the
numbers
inch)
inch)
7-1a)
enables
present
described
drive the
and
low
the
design
shipping
00001
(PiN
(PiN
(PiN
in
exist
same
are
Ma-
order
base
00001
features
in
00101
des-
group
through
2200006)
2200007)
2200052)
the
CE
in a disk
deflection
disk.
FOR ALTERNATE MAINTENANCE INSTRUCTIONS
The
Disk
Run
Out
gage,
used
for
serial
numbers
shape
and Chapter and
its
2,
use,
This
to
the
head manually of
the
gage. A knurled
permits
adjusting Procedures Section
7.2.3
The
4.2.3.
Branch
following
part
although
is
gage
is
arm
rotated
for
Office
tools
00001
through
number
than
its
attachment
identical.
mounted
assemblies,
between
adjusting
the
gap
using
the
Tools
are
available
00050,
the
gage
specified
to
on
the
base
so
that
the
the gap on adj
screw
to
determine
gage
are
described
at
the
machines has a different
the
plate
disk
ustable
on
runout.
Branch
base
adjacent
can
the
in
with
in plate,
lips
gage
Office:
Disk
CE This
Disk This
7. 3
7.3.1
The sections, movable through
1.
2.
Cartridge
tool
is
identical
Cleaning tool
is
identical
PLENUM COVER AND
Plenum
complete
one of which
section
which
Remove Remove securing
these
screws
Fixture
Cover
plenum
can
the
drive eight
plenum
(PiN
2200001)
to
that
(PiN
to
that
Removal
cover
can
be
identified
spindle
belt.
(Refer
mounting
cover
secure
the
described
2200008)
described
FILTER
and
is
composed
be
removed.
pulley
screws
to
baseplate.
belt
in
in
Replacement
as
that
protrudes.
to
Section
(Figure
guard
to
Chapter
Chapter
of
two
The
re-
section
4.
1.
7-1b)
One
of
plenum
1. )
cover.
3.
The
4.
plenum
from
baseplate
Replace
cover
plenum
can
of
the
cover
now
be
machine.
by
reversing
lowered
Steps
vertically
1
and 2.
7.3.2
1.
2.
3. The
Plenum
Remove Remove
air
Air
drive plenum
filter
Filter
belt.
cover.
can
Removal
See
be
lowered
Section
See
Section
vertically
and
Replacement
4. 1. 1.
7.3.1. downward.
be
2.
2.
227
-5984
(9/65)
7.1
Page 57
Stationary
Lip
Figure
7-1a.
Disk Run Out Gage
4.
Replace
air
and 3.
WARNING: When
certain filter position,
particles the free
remove
7.4
7.4. 1 Blower
1.
2.
3.
that
the
and
base
plate.
leaks
can
to
be
blown into
plenum
tissue
cover dampened
accumulated
BLOWER ASSEMBLY
Assembly
(Figure
Turn
Disconnect
strip
Remove
securing
off
all
located
three
blower
7-1)
blower
baseplate.
4.
The
blower
from
the
baseplate.
5.
Replace
2,
3,
blower
and
4.
filter
by
reversing
replacing
foam-rubber
If
this
result
which will allow
the
and
cartridge
with
particles.
Removal
ac
and
dc
power
motor
in
ac
box.
binding-head
motor
may
now
be
assembly
plenum
seal seal
cartridge.
air
91%
Isopropyl
to
leads
mounting
mounting
lowered
by
reversing
steps
air
filter,
is
between
is
not
in
duct
with
and
Replacement
machine. from
bracket
vertically
1, 2,
make
the
air
its
proper
foreign
Also,
clean
lint-
Alcohol to
terminal
screws
to
away
steps
1,
Bose
Plate
Mounting
Hole
NOTE:
assembly is in
7.4. 2 Blower
Same does
7.5
7. 5. 1 The
bly
1. Shut off
There
is a gasket
and
electronics properly this
positioned
area.
Motor
as
Section
not
contain
ACTUATOR ASSEMBLY
Actuator
entire
may
be
Assembly
carriage
removed
all
power
cartridge.
2.
Disconnect
tacles
cable
3.
Unsolder
read/write
and
remove
receptacles.
home
with a different
tate
identification.
4.
Remove from which
tachometer
terminal
each
lead
Removal
4.4.4, clamps
and
as a unit
switch
colored
strip
is
between
gate.
to
prevent
except
at
the
Removal
mount
to
the
head
the
clamp
leads
grease
leads and
removed.
the
Be
excessive
and
Replacement
motor
end
rings.
of
the
as
follows:
machine
cables
which
and
and
drive
note
terminal
inlet
to
sure
this
installation
and
Replacement
actuator
and
remove
from
secures
mark
each
pencil
to
coil
from
Height
Adjustment
Screw
blower
gasket
openings
assem-
recep-
the
lead
facili-
leads
7.2
Page 58
Drive Belt T ens ion
Adjustment_--l~~~~+!1t.
Spring
Plenum
Cover
Drive Belt Plenum
Section
(Remove to
replace
Cover
Filter)
Belt
Drive Tension Adjustment Screw
Figure
7-1b.
5.
Remove
load
plunger.
6.
Disconnect
door
between guide
7.
Remove
unfasten assembly.
8.
Removethe which base
9.
Lift two dowel the bracket.
2310 Disk
retaining
solenoid
opener
actuator
located
tachometer
tachometer
secure
plate.
carriage
single
plunger
the
and
adjacent
five
the
drive pins dowel
Storage
ring
spring
remove
and
socket
actuator
in
carriage
pin
Drive
..
Bottom
from
and
slide
attached
the
shroud.
to
the
bracket
assembly
head
assembly
assembly
mounting
on
tachometer
View
of
pivot pin in
pivot
pin
to
the
cartridge
air
baffle
Remove
actuator
mounting
from
assembly. screws
actuator
mounting
to
vertically
base,
mounting
Machine
head-
out
of
mounted
the
disk
screws
the
off
the
and
to
I
10.
7.6
7.6.1
1.
2.
3.
these
motion
Replace through
readjust
DRNE
Drive
Turn Push extend. Remove
leads
resulting
actuator
10.
if
MAGNET
Magnet
off
all
the
carriage
the
would
cause
in
Check
necessary
power
three
=~~+
uncontrolled
damage
to
assembly
head
load
(see
Removal
to
the
and
machine.
forward
binding-head
____
carriage
equipment.
by
reversing
adjustment
Section
as
7.8.2).
Replacement
far
as
mounting
it
Belt
Screw
steps
and
will
screws.
Guard
Pulley
2
CAUTION: for
terminals
I
coil
after
227
-5984
(9/65)
Ensure
of
the
replacing
that
correct
tachometer
the
actuator.
leads
are
assembly
Reversal
matched and
voice
of
NOTE: the
electronics
filter
Access
from
gate.
can
gate
be
gained
by opening
to
the
gate
screws
and
removing
nearest
7.3
Page 59
WARNING: the
mounting mounting result. smoothly out of or
hammer epoxy magnet. When place particle
certain
be respective
4. Slide
5. Replace
and 3. the Section
7. 6. 2
Adjustment of
be accomplished installed. could alignment
The
actuator
provide a O.
net
spacer
Do
not
force
base,
With a
on
joints
binding
masking
bracket
the
tape
since
and magnet mounting
moderate
the
mounting
magnet
the
the
magnet
over
accumulation. When replacing the magnet,
that
mounting
counterbore
magnet
drive
horizontally away
drive
magnet
If
a new
magnet
magnet
7.6.2.
Drive
Magnet Adjustment
the
drive
whenever
This
adjustment
cause
distortion
of
the
carriage.
threaded
mounting
sleeve
bracket
0005-inch
which
is
located inboard on
bracket.
1. Remove
locknut which
the
mounting
secures
spacer.
2. Use a
feeler
clearance
gage to obtain
between
3. Tighten the locknut
ance
is
obtained and
the
magnet to
damage to
drive
spacers
force,
the magnet will
bracket.
since
this
could
face
plates
to
the
is
out of the machine,
the
flux gap to
spacers
are
seated
recesses.
from
by
reversing
is
installed,
adjustment
described
magnet (Figure 7-2)
a new
drive
of
prevents
the
base
binding which
and
result
located outboard on
must
be
positioned
clearance
the
after
replace
with the
screw,
and
the sleeve
the
spacer
the
O.
the
loosen
against
0.0005-inch
and
0005-inch
mounting
slide
coil,
Do
not destroy
permanent
prevent
in
carriage.
steps
perform
in
magnet
drive
the
mounting
sleeve.
out of
would
slide
drop
their
2
is
to
is
in
mis-
the
to
mag-
the
the
clear-
screw.
the
4. Replace 2, and 3. tighten (refer
7.7.2
WARNING: for
the
ment
and
spacing.
bolts
holding the
or
electro-magnet.
1.
Turn
2. Loosen detent screws out rocking,
3.
Push against mounting assembly
(±O.
or detent
detent
assembly
Insert
mounting
at
this
time.
to
Detent
section
Assembly
7.
The only two CE
detent
assembly
the
electromagnet
Do
not,
under
springs,
off
all
power
three
socket-head
assembly
to
until detent
toward
registration
the
corresponding
base
(Figure
along
this
003) inch
is
formed
even pawl and a detent crown tooth of
rack.
(If
necessary,
align a crown tooth of detent
Tighten the
to
secure
4. Check
step 3 if
5. Remove that
C E switches
three
this
adjustment.
adjustment
necessary.
CPU
signal
socket head mounting
can
accessing.
6.
Turn
on
power
to
machine and
cartridge.
WARNING: before
The CE
disk
continuing with the
by
Adjust
reversing
screws,
detent
steps
but
assembly
7.2).
Adjustment
adjustments
are
the air-gap
any
circumstances,
spring
to
the machine.
actuator
assembly
and away
ledge of detent
7-3). Slide
(Figure
pawl-to-rack
alignment
post,
spring
cap
screws
assembly.
will
slide,
from
detent
assembly
edge of
carriage
detent
required
securing
edge until a gap of 0.007
made
cable
be
cartridge
between
in
used
move
rack
step
from
to
either
the odd
carriage
with a pawl. )
3.
Repeat
processor
control
insert
CE
must
be
procedure.
1,
do not
7-3)
align-
loosen
mount,
Loosen
with-
rack.
the
to
screws
so
disk
inserted
7.7
DETENT ASSEMBLY
7. 7. 1 Detent
1. Disconnect
Mark moval
2. Remove securing
Assembly
the
pin
to
facilitate
three
detent
detent
location of
socket-head
AND
DETENT RACK
Removal and Replacement
coil
leads
from
terminal
each
lead
prior
identification.
mounting
assembly
to
carriage
base.
3. Remove away
7.4
detent
from
assembly
carriage
by lifting
assembly.
it
strip.
to
re-
screws
mounting
upward
7. Upon completion of energized. ensure
Give
carriage a slight
full engagement between
pawl.
8. Loosen detent
9.
Use a fine blade (serrated) (Figure
and pole
# 0-80 nut
coil
using a 3/16-inch
screwdriver
portion
7-3) until
pieces
an
is
(Figure
of
within inch width. Use non-magnet this
air
gap
measurement.
sive
force
on
the
adjustment
step
6, one
the
gap-adjuster
air
gap between
O.
detent
push to
rack
7-3) on
the
End Wrench.
to
turn
004 (+
O.
shims
Do
not apply
because
coil
is
and
detent
energized
the
knurled
nut
the
clapper
001,
-0.
to check
exces-
too much
002)
Page 60
Spacer
Drive Magnet
Mounting Screw
(2)
Figure
7-2.
force
will clappers proper
gap
applying
NOTE:
can
be
applied
wrench
The right
10.
with
170
angle
Set steps. move other
the
11. Move
tact
12.
Repeat
13.
Turn
14.
Replace
NOTE: a
CE
Cartridge
the
detent
Drive
Magnet
cause
deflection
resulting
is
achieved,
15
to
20 inch-Oz of
The
required
by
170
to
to
225
gram
to
the
the
CE Step Mode
Using carriage detent
pawl
rack.
carriage
between
Steps
off
all
power
CPU
The
Read/Write
installed
assembly
Adjustment
in
an
15
loading
225
load
shaft
the
CE Step
one
should
slightly
pawl
and
8 and 9
signal
has
of
the uneven tighten
torque.
to
20 inch-Oz of
the
free
grams,
must
of
the
end
switch
Control
track
(0.
now
to
check
rack
for
the
to
the
machine.
cable
on
head
must
after
.each
been
accomplished.
spring gap. the
When
#0-80
supported
nut
torque
end of
the using a gram be
applied
at
wrench.
to
10
milli-inch switch,
010-inch).
be
engaged
for
good
engagement.
second
detent.
processor.
be
adjusted
adjustment
the
by
end
gage.
a
The
with
con-
--+10-1
with of
"""*--
Base
15.
7. 7. 3
Adjust for
Plate
Adjust
Detent
Removal
1.
Remove
7.7.1).
2.
Remove that
carriage.
3.
Lower
Replacement
1.
Place
Figure contact detent
(Refer ment).
2.
Install secure
3.
Check spacing
read/write
Rack
detent
two
secure
detent
detent
7-4.
between
rack
to
section
two
the
detent
and
0.0005"
Clearance
head
Removal
assembly
binding-head
detent
rack
rack
to
rack
in
Press
upward
registration
and
registration
7.
7.4
binding-head installation.
adjustment
detent
alignment
(See
and
(Refer
mounting
(Figure
remove
position
for
details
mounting
by
Section
7.15.1).
Replacement
to
section
screws
7-4)
to
from
carriage.
shown
in
on
rack
to
surfaces
ledge
on
carriage
of
adjust-
screws
observing
with
the
rack.
the
ensure
on
to
clapper
227
-5984
(9/65)
7.5
Page 61
Gap
Between Clapper and Pale Piece of Energized Detent
0.004"{+0.00l;"0.002")--I~"
Clapper (
__
_ .....
I~_
Gap
between De-energized Pawl
and
0.007 ± 0.003"
Rack
Knurled
Gap
Adjusting
Screw
(2)
Registration of Detent
Mounting Screw
Figure
Ass
••
7-3.
Detect Assembly, Adjustment
mblv_
{3'------"\
~--------.Even
-------Spring
-mr---------_Spring
Detent
(Energized position)
Rack
r----
___
Pawl
K.Jck
Mounting Screw
Post
Mount
(2)
4.
Realign
Read/Write
head.
(Refer
7.15.1).
5.
Adjust
Crash
stops
(Refer
to
section
4.10.2).
6.
7.
Adjust Replace
Home
detent
Switch
assembly
(Refer
to
section
(Refer
to
7.7.1).
7.
7.4
Detent
NOTE: is
accomplished
be
loosened
on
the
carriage.
7.6
Rack
Adjustment
during
or
readjusted
Adjustment
of
the
detent
replacement
after
rack
it
is
and should initially
to
section
4.
10. 1 and
7. 11. 2).
section
(Figure
7-4)
never
installed
When a right tent the surfaces lish a flush carriage. tightened
detent
end
(as
assembly)
right
end of
The
to
rack
viewed
should
of
carriage.
detent
contact
two
secure
is
replaced
from
be
flush
rack
must
with
the
mounting
the
detent
the
The
registration
7. 8 HEAD LOAD ASSEMBLY
7. 8. 1 Head
1.
Turn
off
Load
all
Solenoid
ac
and
Removal
dc
power
(section
direction
(:I:
O.
001-inch) with
top
registration
be
pressed
screws
rack
alignment.
to
machine.
7. 7. 3),
of
the
to
ledge
must
be
and
Replacement
its
de-
estab-
of
Page 62
Figure
7-4.
2.
Remove
TB4 (pins 7
Remove
3.
4.
Remove
solenoid
5.
Slide to
effect
6.
Replace steps 1 through
(section
7.8.2
Head
WARNING: rotating machine, to
loading.
damage
1.
2.
3.
NOTE: second ing
to
Remove on
machine. Install Power of
heads.
Read/Write
delay.
procedure
Detect
solenoid
pivot
two
to
solenoid
removal.
the
7.8.2).
Load
Do
in
machine.
insert
Failure
heads
CPU
a CE
up
Rack,
Removal
and
8).
pin
binding
mounting
horizontally
head
5.
Assembly
not
load
an
IBM
to
and/or
signal
cartridge
the
machine
heads
If
heads
to
accomplish
Registration Surfaces on
Detent
and
leads
from
from
solenoid
head
screws
bracket.
load
solenoid
Readjust
Adjustment
heads
when
When
cartridge
card
between
comply
disk.
cable
in
machine.
and
should
fail
to
head
Rack
Replacement
terminal
plunger.
away
from
by
head
disk
will
result
from
plug
check
for
load
load,
use
loading:
Screws
strip
securing
bracket
reversing load
assembly
(Figure
is
not
is
out
of
heads
prior
in
connection
loading
after a 90-
the
follow-
Mounting
(2)
7-5)
a.
Observe out.
b.
Shut off
c.
Loosen secure mounting
d.
Use per or plunger solenoid
O.
out,
O.
e.
Tighten
the
4.
Use
masking
switch
the
switch
switch
far
as
WARNING:
in
held applied
transferred
to
equipment.
power
the
the
the
solenoid
turn)
backwards
has
031-inch.
move
031-inch.
the
adjustment.
in
the
mounting
backwards
possible.
If
the
solenoid
that
solenoid
to
machine.
two
binding
head
load
bracket.
adjust
to
move
in
the
bottomed
backwards
If
solenoid
solenoid
two
mounting
tape
to
hold
transferred
screws
toward
Hcads
Loaded
position,
coil
resulting
plunger
head
solenoid
screw
the
solenoid
bracket.
out,
move
approximately
has
not
forward
approximately
screws
the
heads
position.
and
slide
the
solenoid
switch
'18
vdc
will
in
damage
has
screws
to
the
(0.
031-inch
forward
If
solenoid the
bottomed
to
loaded
Loosen
the
as
is
not
be
bottomed
that
secure
to
227
-5984
(9/65)
7.7
Page 63
Head
load
Solenoid
Base
Figure
7-5.
5. With the noid ward loading to all the
solenoid solenoid.
Back
6. and mounting ward
adjusting
7.
Check loading within
mounting obtained.
8.
Access
mirror
0.010 loading at ism
Plate
___
Head
the
two
adjusting
until
slide
the
solenoid
off
tighten
so
0.030
inch
track
between
J
Load
Assembly
carriage
solenoid
screw.
the
pivot
roll
pin
the
solenoid
way
into
mounting
adjusting
the
solenoid
the
screws
that
it
screw.
clearance
roll
pin. This
(±O.
screws
the
carriage
to
check
between
roll
pin
199.
This
the
Pivot Bracket Mounting Screw
Adjustment
detented
mounting
at
screws
Slide
plate
contacts
in
the
head
back
until
the
cam
followers.
screws
screw
against
adjusting
lock
nut.
Loosen
and
slide
the
will
bear
lightly
between
the
clearance
010) inch. after
this
to
track
for a minimum
the
pivot
while
the
carriage
check
determines
carriage
rail
track
and
the
solenoid
the
load
cam.
the
cam
and
position
the
screw
the
solenoid
against
pivot
plate
should
Tighten
clearance
199. clearance
plate
and
and
pivot
Heads-loaded
000,
loosen
the
sole-
back-
head-
Continue
moves
Tighten
the
back
of
the
one
turn,
solenoid
back­the
and be
the
solenoid
has
been
Use a dental
of
the
head
is
positioned
parallel-
plate.
Solenoid Mounting Bracket
9. Shut down carriage
10.
stops. of head
If
plate
There
0.010 unloading
conditions
and apparent, bracket is
to
accomplished mounting loosening each,
and
in
the
proper
NOTE: to obtain
11.
move
the
Repeat
It
may
the
rear
O.
010
steps 5 through
adjustments
12.
Adjust
heads procedure. a.
Slide
against
move
Solenoid Screw and locknut
the
machine
between
should
inch
between
roll
of
roll
pins
it
will
obtain
screw
the
rear
tapping
direction
be
necessary,
end of
inch
have
loaded
switch
the
the
masking
Adjust
and
the
forward be a minimum
the
pin
for
parallelism
in
steps
be
necessary
the
required
by
first
loosening
of
the
pivot
mounting
the
forward
to
the
pivot
clearance
9
not
been
switch
toward
head
head
load
tape.
manually
and
pivot
all
carriage
between
8 and 9
to
clearances.
bracket,
screw
end of
obtain
in
some
bracket
for
parallelism.
to
ensure
altered.
using
load
actuator
move
rear
crash
clearance
plate
and
positions.
the
pivot
are
not
adjust
the
the
forward
then
1/8-turn
the
parallelism.
instances,
also,
that
other
the
follOWing
contact
link and
the
the
pivot This
bracket
to
point
re-
7.8
Page 64
b.
Place
a
O.
005
inch
shim
between
c.
CA UTI hand is
warm
24
vdc adjustment coil
resulting
too
hot
is
not
13.
Adjust is
section
14.
Power
button bottoms
in
to
in
excessively
and
link.
out.
Tighten
ON : Feel
inspect
is
to
mounting
this
position.
the
head
for
overheating.
to
the
touch
during
applied. A defective
will
cause
48
in
excessive
grasp
and
hold,
proper
the
adjustment.
heads
loaded
hot
(refer
7.8.3).
down
the
machine.
Move
screws
loaded
vdc
heating.
the
switch
to
switch
to
solenoid
The
normal
Heads
to
be
heads
if
procedures
7. 9 HEAD LOAD SPRING ASSEMBLY
NOTE:
spring Chapter assembly is
Removal
assembly
4. Do whenever a new
installed.
is
not
and
the
replace
replacement
same
as
the
counterbalance
head
load
of
described
spring
switch
until
secure
solenoid
operation
Loaded
applied
If
the
loaded
solenoid
the
head
in
assembly
it
switch
coil
by
when
Switch
to
the
coil
switch
coil
of
load
spring
coil
is
7. 10 CRASH STOPS
NOTE: as
7.10.1
Use ate track
Adjustment
described
Rear
appropriate
carriage
000
against
in
Section
Crash
switches
in a reverse
rear
magnet).
NOTE: switch stop
and clearance
It
may
out
of
adjustment.
Adjust
tighten
screw locknut
exists
be
the
necessary
way
on
between
carriage.
Operate
then
reverse,
clearance
stop
when
~':;OTE:
adjustment justed
adjustment
carriage
If
the
of
as
described
carriage,
to
check
Home Switch the
rear
of
front
4. 10.
Stop
Adjustment
on direction
crash
to
accomplish
left
end of
so
that a 0.003;
rear
first that
the
is
maintained
is
detented
was
crash
in
Section
crash
1.
the
stop
to
move
crash
in
forward
0.003,
on
moved
stop,
7.11.
CE
(near
rear
track
stop
Panel
to
the
crash
(±O.
stop
at
it
2.
is
the
to
detent
drive
the
home
rear
001) and
direction
(±O.
the
rear
000.
to
accomplish
must
on
crash
stop
inch
001)
be
same
oper-
and
inch
crash
read-
7.9.1
Head
Load
Spring
NOTE: installed replaced stalled those
The
head
on
all
whenever a new
on
machines.
machines
counterbalance
Adjustment
of
accomplished
1.
With
heads
2.
3.
spring spring Check off of tab force (±1) ated the
Repeat
is
perpendicular support.
the
the
on
the
is
grams
counter
mounting
step
maintained.
Spring
Adjustment
load
machines,
which
spring.
the
counterbalance
as
follows:
unloaded,
force
required
head.
This
spring
not
4 (±1)
at
the
balance
screw
2 to
ensure
Assembly
counterbalance
and
this
head
load
These
procedures
still
incorporate
spring
position to
the
side
to
lift
force
is
which
contacts
grams
bottom
spring
to
deliver
at
head,
that
the
at
the
Counterbalance
spring
spring
spring
the
counterbalance
of
the
measured
the
top
form
the
the
required
is
is
not
is
in-
apply
the
head
is
to
the
head
spring
head.
head,
the
bend
nearest
required
to
be
at
and 9
associ-
force
not
to
be
load
load
support
the
If
this
force.
7. 11 HOME
7. 11. 1
1.
2.
3.
Home
Remove
Remove Remove Switch
4.
Remove
to
mounting
5.
Replace
through 4 and Section
7.11.2
1.
Home
Use
appropriate operate on
track
2.
Place carriage just
the
switch
SWITCH
Switch
all
leads
two
mounting
binding
Removal
ac
and
from
binding
bracket
head
dc
bracket.
Home Switch by
adjust
7.11.
2.
Switch
Adjustment
switches
carriage
in a reverse
001.
a
O.
007
-inch
and HOlne
Home Switch
just
transfers.
power
Home
head
to
screws
reversing
switch
feeler Switch
adjusting
and
Replacement
from
Switch
screws
terminals.
securing
actuator
securing
according
on
the
CE
direction
gage
between
pushbutton
screw
machine.
bracket.
switch
steps
2
to
Panel
to
the and until
Home
to detent
ad-
the
227 -5984
(9/65)
7.9
Page 65
3.
Check
this
adjustment
with a O.
005-inch
feeler
gage
to
determine
that
Home Switch
will
not
transfer.
7.12
TACHOMETER
AND
TACHOMETER
EXTENSION ROD
7.12.1
Tachometer
Extension
Rod
Removal
1.
Remove
outboard
adjusting
nut which
secures
rod
to
carriage
arm.
2.
Loosen
inboard
adjusting
nut
sufficiently
to
free
rod
from
carriage
arm.
3. Slide
extension
rod
away
from
home
switch
and out of
the
tachometer
coil
and housing
assembly.
WARNING:
Exercise
care
to avoid bending
the
rod
or
scoring
the
core
as
rod
is
extracted
from
shield.
4.
Replace
tachometer
extension
rod
by
reversing
steps
1, 2, and
3.
7.12.2
Tachometer
Extension
Rod
Adjustment
The
tachometer
extension
rod
(Figure
7-6)
is
ad-
justed
so
that
when
the
carriage
is
dented
in
track
000,
the
shoulder
of
the
rod
protrudes
0.137,
Extension
Rod
Shoulder
flush
with end of
Carriage
End
of
Tachometer---·
....
1
Figure
7-6.
Tachometer
Extension Rod Adjustment
7.10
r " .
.
(±0.010)
inch
from
the
carriage
end
of
the
tachometer.
This
adjustment
is
performed
as
follows:
WARNING:
Use
extreme
care
to
avoid bending
the
tachometer
extension
rod
while
making
this
adjust-
ment.
1.
Detent
carriage
to
track
000.
2.
Loosen
the
two
locking
nuts
where
rod
attaches
to
arm
extending downward
from
carriage.
As
a
point
of
reference,
advance
the
inboard
nut.
This
will
push
the
extension
rod
further
into
the
tachometer.
Continue
this
process
until
the
extension
rod
shoulder
is
flush
with
the
end
of
the
tachometer.
NOTE:
This
distance
can
be
judged
within
O.
OlD-inch
by
eye
(See
Figure
7-6).
3.
Back
off
the
inboard
nut
by
5-1/2
turns
from
the
reference
position
obtained
in
step
2.
Since
the
nut
advances
O.
025-inch
per
revolution,
the
total
movement
will
be
0.137
inches.
4.
Hold
the
inboard
nut
firmly
to
prevent
rotation,
and
tighten
the
outboard
nut. In
accomplishing
this
step,
apply
sealant
(PiN
2111360) to
secure
the
adjustment
from
vibration.
If
the
assembly
is
equipped with
an
outboard
lockwasher,
omit
the
use
of
sealant
to
secure
the
adjustments.
Page 66
5.
Check
the
carriage
binding
the
7.12.3
does
not
tachometer
Tachometer
prevail
extension
Assembly
Replacement
1.
Remove
2.
Remove
spindle
3.
Unsolder on
facilitate
4.
Remove
section
WARNING:
tachometer rod
can
5.
Remove
mounting bracket)
6.
Slide
ing
7.
Slide out
WARNING: end
of
not
bend
since
they
disk
cartridge
from
tachometer
tachometer
identification.
tachometer
7. 12. 1.
Caution
core
be
bent,
two
base
which
tachometer
base
and
tachometer
of
tachometer
Slide
tachometer
tachometer
can
break
cartridge
baseplate.
bracket.
must
and
extension
and
core
set
screws
and one
secure
tachometer
coil
shield
electrical
within
assembly.
8.
Replace
steps 2 through section
the
tachometer
7.12.2.
7 and
7. 13 CARRIAGE RAIL
7.13.1
1.
2.
Carriage
Turn
remove Loosen play
of
off
all
top
two
rail,
Rail
ac
and dc baseplate set
screws,
sufficiently
movement.
3.
Insert carriage preload of avoid
O.
100-inch
preload
force
the
carriage
misalignment.
on
the
mounting
for
friction
from
receiver,
leads
extension
be
broken
located
the
shield
coil
and
shield.
and
housing
nearest
the
adjust
Removal
power
cover.
feeler
spring
rail,
as a result
rod
adjustment.
Removal
machine. shroud,
from
Mark
each
rod
exercised
rod.
if
(one
located
in
tachometer
out
of
carriage
bracket.
housing
assembly
the
leads
coil
assembly
according
and
to
the
which
eliminate
to
allow
gage
shim
and
carriage.
and
slide
base
being
to
ensure
of
making
that
and
and
terminal
lead
to
according
in
handling
The
extension
dropped.
in
carriage
tachometer
shield.
mount-
assembly
out
spindle.
back
and
by
and
forth
housing
reversing
Do
to
Replacement
machine
side-
the
rail
free
between
Remove
the
rail
careful
strip
to
the
and
the
out to
WARNING: the
carriage
4.
Replace
NOTE: carriage riage ciently until
movement
7.14
7. 14. 1
Misalignment
bearings.
carriage
After
carriage
rail
for
movement
motion.
tighten
If
set
any
screws
disappears.
CARRIAGE SUBASSEMBLY
Carriage
Subassembly
Replacement
1.
2.
3.
4.
5.
6.
Remove Remove
Loosen clamp plugs Remove (section
Unsolder from Remove carriage
all Drive
binding
to
release
from
head
tachometer
7.12.2). voice
which
two
outrigger
ac
and Magnet
each
binding
slide.
7.
Remove
8.
Lift
carriage
WARNING:
read/write
carriage
carriage
mounting
Caution
heads
assembly
do not
removal.
9.
Replace
carriage
steps 2 through
WARNING: When
slide,
be
certain
is
parallel
carriage
10.
11.
mounting
Adjust to
section
Adjust
to"
tachometer
head-arm
section
12.
Perform
carriage
a.
Check
necessary
replacing
that
the
vertical
base.
7.12.1.
7. 15. 1.
the
following
subassembly
detent
according
in
rail
by
rail
has
in
movement
located
dc
power
(section
head
screw
head
plug.
cables.
extension
coil
leads
lead
is
head
slide
rail
(Section
vertically
base.
must
be
strike
subassembly
7.
the
the
slide
surface
extension
assemblies
adjustments has
adjustment
this
step
reversing
been
the
direction
is
apparent,
in
Removal
to
machine.
7.6.1).
securing
Disconnect
rod
and
note
removed.
screws
to
carriage.
7.13.1).
exercised
anything
by
plastic
does
not
of
rod
according
been
installed:
and
to
section
could
steps
replaced,
the
rail
and
head
from
terminal
securing
Remove
away
to
ensure
during
reversing
outrigger
touch,
its
guide
according
to
if
a
new
readjust
7. 7. 2.
damage
2 and 3.
test
of
car-
suffi-
supports
plug
head
carriage
from
that
and
in
the
if
227-5984
(9/65)
7.11
Page 67
b.
c.
Adjust
to
Adjust
front
section
home
7.11.2.
7.15
HEAD-ARM ASSEMBLY
7. 15. 1
NOTE:
heads
obtain Section
numbers
The accessible requires access
Head-Arm
The
by
using
the
oscilloscope
4.
17. 1
00001
location
that
to
this
requirements
track
are
through
of the
from
the
screw.
Procedures
assembly
1.
are
Remove ing
to
to
the
as
drive procedures head
adjusting
and
4. 10. switch
Assembly
100 of
identical
head
inside
drive
for
adjustment
follows:
magnet
of
rear
crash
according
Adjustment
for
aligning
the
display
for
00050. adjustment
the
voice
magnet
from
section
screws.
stops
OE
cartridge
patterns
machines
screw,
coil
be
removed
of
the
the
actuator
7.6. 1 to
according
to
section
read/write
Figure
with
which
(Figure
to
head-arm
gain
to
4-8,
serial
7-7)
gain
accord-
access
is
2.
Torque pound-inches.
3.
Back each coil potted is
required
4.
Install machine carriage the
even
NOTE: gize
still
Operate
the
even
positioned
rack.
5. Allow continuously temperature fore
6.
Scope play 5 ms/ 40
ms).
Negative
both
off
the
head-arm
until
the
capsule
the
CE
to
load
to
detent
detent
at
the
machine
adjusting
from
cm Synchronize Reference,
head
clamping
head
adjusting
assembly
head
load
on
the
to
observe cartridge
heads.
track
100
coil.
the
CE
Step Mode
coil.
CE
track
and
for
15
minutes
stabilization
heads.
Pin
D3B07.
(one
revolution
screws
screws
back
toward
spring
just
head. A dental
the
lower
head.
and
apply
Manually
and
detent
move
by
switch
Ensure
cartridge
the
Pin
that
100
when
to
ensure
has
taken
Set
time
of
oscilloscope
K2B04.
detent
to
base
the
to
3.5
(±1.
and
push
the
voice
clears
the
mirror
power
to
the
energizing
to
ener-
carriage
engages
operate
that
place
be-
to
dis-
disk
is
on
0)
the
is
Present (Approx)
Voice
Head Adjust
Screw
Figure
Coil
7-7.
0.200"
(2)
Head
__
Arm
-.!
Assembly
Detent
located
Adjustment
Clamping Screw
Head 1
Carriage
at
Track 100
Head
Positioned to Read on Track 100
CE
7.12
Page 68
7.
Insert
(P/N socket Head
8. Slowly observing first
Figure erlyaligned,
will
be
amplitude.
NOTE: the
If
spindle, machine, arm
backwards
step
3,
then assembly head
load
the
arm
assembly spring capsule
It
slightly using
9.
will
Back
will
which
be
if
step
when
the
scope
head
10.
Use
the
steps 2 through
NOTE:
If
adjustment necessary home
switch
sion
rod
(section
11.
Replace
7.6.1) sockets.
the
Head
2200052) for
head
Select
switch.
advance
the
show
noise
4-8
will
the
present
the
head
it
will
remove
the
toward
repeat
is
correctly
spring
not
be
will
in
encases
necessary
correct
8.
off
the
head
adjustment
display
alignment
CE
switch
the
detent
of
the
head-arm
to
readjust
(section
7.12.2).
drive
and
connect
Alignment
between
O.
Select
the
head
scope
pattern.
only,
then
appear.
pattern
and
the
is
moved
be
necessary
CE
cartridge,
the
voice
step
8. When
positioned,
bear
on
spring.
The
contact
the
read/write
to
shift
adjustment
adjusting
has
been
pattern
is
not
affected.
to
select
9.
rack
was
the
crash
7. 11), and
magnet
on
head
Oscilloscope
the
head
head 0 with
adjusting
The
the
When
of
View
lobes
will
forward,
to
coil
the
the
the
dimple
head
with
the
cable
pattern the
shut
and
as
load plotted
Adapter plug the
screw
while
scope
of
head
is
B,
Figure
be
equal
too
far
down
push
described
head-arm
lip
of
the
of
and
CE
will
View
prop-
4-8
in
toward
the
the
coils.
the
detent
cannot
completed.
to
moved
assemblies,
the
cables,plugs~and
rack
be
made
screw
one-half
ensure
Head
stops
that
1,
to
accomplish
(section
tachometer
actuator
Observe
the
and
repeat
it
will
exten-
(section
turn
be
4. 10),
in
A,
3.
Remove brackets
WARNING:
receiver
assembly
4.
Lift
cartridge
5.
Replace steps 2 through
6.
Check described absolutely
7. 16. 2
NOTE:
Cartridge
The
completed cartridge gage
for
adjusting cartridge it
should
not
Adjustment
1.
Loosen pivots is
free
(Figure
Pivat
Brac
ket
4.581"
Reference
I
both
from
Exercise
from
machine
and
disrupting
the
cartridge
the
cartridge in
necessary.
cartridge
prior
to
interlocks.
receiver.
be
changed
is
to
be
both
self
of
the
cartridge
to
move
7-8).
(2)
cartridge
baseplate.
care
to
avoid
the
receiver
4. receiver
section
7.
Receiver
receiver
attempting
Any
the
side-to-side
After
unless
accomplished
locking
slightly
(2)
Locknut
receiver
in
lifting
support-pivot
the
striking
detent
adjustment.
from
machine.
receiver
by
adjustments
16.2.
cartridge
Readjust
Adj
ustment
adjustm~nt
an
adjustment
serves
position
this
adjustment trouble
as
follows:
nuts
located
receiver
so
in a sidewise
-~-
: I
cartridge
the
detent
reversing
only
must
of
as
of
the
is
made,
is
suspected.
on
the
that
receiver
direction
,5.000"
if
be the a
.
.010")
7.16
CARTRIDGE
7. 16. 1
Cartridge Replacement
1.
Remove
2.
Remove cartridge
227-5984
(9/65)
all
ac
tension
receiver
RECEIVER
Receiver
(Figure
and
dc
power
spring
and
Removal
that interlock
7-8)
from
attaches
and
the
machine.
to
assembly.
Reference
Figure
7-8.
Cartridge
Cartridge
Receiver
Receiver
i\djmlmcnl
--+--L
Cartridge
Rest Pin
(2)
7.13
Page 69
2.
Install a cartridge
each
side.
of
the
top
raised
portion
(near
the
on both
3. Shake ways
4. With in locking the will
sides
the
until
the
its
preferred
nuts
cartridge
secure
NOTE: With tridge always out
receiver
disturbing
7.17
INTERLOCKS
be
removed
If
rails
door),
front
it
front
the
this
and
the
and
there
is a gap
of
the
of
the
take
using
mM
of
the
assumes
of
the
cartridge
position,
until
they
receiver
adjustment.
adjustment
receiver
and
replaced
adjustment
check
between
receiver
front
top
up
this cards
cartridge
its
preferred
tighten
just
contact
pivot
brackets.
established, pivot
as
of
the
for
clearance
and
the
of
the
clearance
as
shims.
receiver
position.
receiver
the
surfaces
brackets
an
assembly with-
self
locking
on
the
front
matching
cartridge
equally
side-
located
two
self
of
This
the
car-
should
nuts.
Latch
Screw
Figure
1.
4-10)
Fully position.
2.
Adjust seat
into
3.
Determine latching face
of
the
latch.
obtain
4.
Tighten has
been
Latch
Switch
Adjustment
section
Interlock
4. 19. 1.
Magnet
Clearance
rotate
handle
the
interlock
the
that
clearance
the
screw Adjust
this
clearance.
locknut
made.
Adjustment
of
latch
Adjustment
Adjustment
to
the
latch
square-hole
0.040
(±O.
exists
and
upper
latch
on
latch
switch
is
Cartridge
screw
notch
010)-inch
between
edge
screw
screw
the
same
(View
so
of
the
the
of
as
necessary
after
as
B,
In
Place
that
it
will
latch.
overtravel
flat
sur-
notch
on
adjustment
to
7. 17. 1 Handle and
NOTE: (section ing
Handle Stop
The a
clearance
surface)
plished
1.
2.
3.
4.
NOTE:
and
the
head
Remove
nal
The
7. 16.
an
adjustment
Handle
cartridge
of
Adjustment
as
Install
Loosen
Adjust
are
parallel
cartridge
Secure
adjustment
At
bracket
next
several
screws
wire
block
cartridge
2)
must
Screw
stop
screw
is
in
place,
with
the
the
cartridge.
of
follows:
CE
Cartridge
handle
the
handle
with,
by
locknut
is
discretion
assembly
adjustments.
which
connections
(TB6).
reassembly.
Interlock
receiver
be
of
the
(View
must
outer
the
handle
stop
screw
stop
and
O.
060
(±O.
on
handle
obtained.
of
may
secure
Mark
Adjustment
adjustments
completed
cartridge
A,
Figure
be
the
handle
edge
in
machine.
prior
interlocks.
4-10)
adjusted
risers
(vertical-cylindrical
stop
screw
locknut.
screw
so
clear
the
030) inch. stop
screw
the
CE,
the
be
removed
Remove
bracket
at
each
pins
pin
to
3 and 4
location
(Figure
to
so
will
is
,that
handle
outer
edge
after
interlock
to
accomplish
the
the
baseplate.
from to
4-10)
attempt-
that
when
have
accom-
risers of
this
handle
two
flat-
termi-
facilitate
the
Adjustment section
4.
of
19.1.
the
interlock
magnet
7. 18 SECTOR TRANSDUCER
7. 18. 1
1.
2.
3.
4.
5. Using CE
6.
NOTE: all
7.
8.
Sector
(Figure
Remove Install
Power Using
CE
scoping reference Observe
to
the
peak
The
delay
pulse
to
The
bits
pattern
Determine of
the
correction that a time both
read/write
Power
Transducer
7-9)
CPU
signal
CE
Cartridge.
up
machine panel, oscilloscope,
pin
D3B07.
on
pin
the
time
of
the
from
the
timing
timing
pulse
by
10p,s.
the
magnitude
delay
down
machine
Index
cable
so
that
access
Synchronize
K2B04.
delay
from
timing
the
leading
pulse
precedes
to
be
made
of 30 (±5)p,s will'
heads.
and
cartridge.
Timing
from
heads
carriage
read
track
reference
pulse
edge
should
and
direction
in
remove
is
the
machine.
will
to
track
095 by
the
on
track
of
the
be
30 (±5) p,s.
the
burst
pulse
prevail
CE
same
as
Adjustment
load.
095.
negative
pulse
095.
reference
of
the
(+
or
-)
timing
so
for
7,14
Page 70
9. With loosen
10.
Use to
position the increase decrease ing
11.
Install observe verify
30 (±5)/-ts.
the
cartridge
the
transducer
the
transducer
the
time
delay.
the
time
the
time
screw
provides a change
the
CE
the
scope
that
timing
handle
lock
adjusting
transducer
Turn
the
delay
delay.
cartridge,
pattern
adjustment
in
the
open
screw
(Figure
screw
to
increase
screw
clockwise
and
counterclockwise
One
turn
in
time
power
up
(Figure
is
within
4-11)
position,
7-9).
(Figure
or
decrease
of
the
adjust-
delay
machine
to
limit
7-9)
to
to
of 78/-ts.
and
of
NOTE: this
adjustment.
is
to
be
12.
Power
cartridge screw
13.
Repeat ment through
Some
jitter
will
The
mean
used
as a reference
down
the
machine,
and
tighten
to
secure
the
steps 1 through 7 to
and
readjust
10
if
required.
be
experienced
timing
setting.
remove
the
transducer
adjustment.
according
pulse
check
to
setps
in
position
the
lock
the
8
making
CE
adjust-
Sector
Figure
7-9.
Transducer Adjusting Screw
Index
Timing
Adjustment
227
-5984
(9/65)
7.15
Page 71
The
alphabetical
serial
numbers
described
in
Chapter
index
from
includes 00001 7,
is
references
through
indicated
for
alternate
00050.
Each
by a reference
index
to
maintenance
item
listed
the
appropriate
procedures
which
is
section
applicable
affected
number
ALPHABETICAL
for
by
the
design
of
Chapter
machines
differences
7.
INDEX
with
227
-5984
(9/65)
1-1
Page 72
AC
input
supply
power,S.
1
Access
circuit
malfunction
troubleshooting,
1.4
Access
adjustments,
4.5
Access
malfunctions,
1.4
Actuator
assembly,
4.
5, 7. 3
Actuator
assembly
removal
and
replacement,
4.5,
73.
Alternate
maintenance
features, 7. 1
Approach
to
scheduled
preventive
maintenance,
3.1
Base
plate
component
malfunctions,
1. 6
Blower
assembly,
4.4,
7. 3
Blower
assembly
removal,
7.3
Blower
assembly
removal
and
repla
cement,
4.4
Blower
motor
removal
and
replacement,
4. 5, 7. 3
Blower Scroll
removal
and
replacement,
4.5
Blower
wheel
removal
and
replacement,
4.4
Branch
office
tools,
2. 3, 7. 1
Carriage
rail,
4.
16, 7.
11
Carriage
preload
bearing
assembly,
4.
16
Carriage
preload
bearing
assembly
removal
and
replacement,
4. 16
Carriage
rail
removal
and
replacement,
4.
16, 7.
11
Carriage
subassembly,
4.
16,
7.
11
Carriage
subassembly
removal
and
replacement,
4. 16, 7.
11
Cartridge
assembly,
4.
2
Cartridge
in
place
switch
adjustment,
4.
20
Cartridge
receiver,
4.9,
7. 13
Cartridge
receiver
adjustment,
4. 19, 7.
13
Cartridge
receiver
removal
and
replacement,
4.
19, 7. 13
Cartridge
service
check,
4. 2
CE
control
panel,
2. 1
CE switches, 2. 1
Cleanliness,
3. 1
Cleaning
read/write
heads, 3. 1
Crash stops,
4.
14, 7. 9
Data
separator,
4.
24
Data
separator
adjustment,
4.
24
Detent
assembly
adjustment,
4.
10,
7.4
Detent
assembly
and
detent
rack,
4.
10,
7.4
Detent
rack
adjustment,
4.
12, 7. 6
Detent
assembly
and
rack
troubleshooting,
1.4
Detent
as
sembly
removal
and
replacement,
4.
10,
7.4
Detent
rack
removal
and
replacement,
4.10,
7.5 Diagnostic aids, 1. 1 Diagnostic
techniques,.
1. 1
Direction
switch, 2. 2
Disk
cartridge
and
read/write
damage,
3.4
Disk
cartridge
replacement
conditons,
4.4
Disk
formatting
procedure,
1. 6
Disk
height
and
run
out
check,
4.3
Drive
belt
removal
and
replacement,
4. 2
Drive
be
It
tension
adjustment,
3. 4
Drive
coil
removal
and
replacement,
4.
10
Drive
magnet,
7. 3
Drive
magnet
and
coil,
4.
9
Drive
magnet
removal
and
replacement,
4.9,
7. 3
1-2
Drive
motor
and
drive
belt,
4.
2
Drive
motor
removal
and
replacement,
4.
2
Electronic
circuits,
3. 1
Errors
and
data
retrieval,
1. 7
Error
retry
procedure,
1. 7
Front crash stop
adjustment,
4.
14
Functional
check,
1. 1
General,
6.1
Handle
and
interlock
adjustment,
4.
20, 7. 15
Head
and
disk
cartridge
scratch
description,
3.4
Head-arm
assembly,
4.17,
7.12
Head
arm
assembly
adjustment,
4.17,
7.12
Head
arm
assembly
removal
and
replacement,
4.17
Head
load
assembly,
4.
12, 7. 6
Head
load
assembly
adjustment,
4.12
Head
load
solenoid
removal
and
replacement,
4. 12
Head
select
SWitch, 2. 1
Head
load
spring
assembly,
4.
14, 7. 9
Head
load
spring
assembly
removal
and
replacement,
4.
14
Heads
loaded
switch
removal,
replacement,
and
adjustment,
4.
14
Home
SWitch,
4.
14,
7.9
Home
switch
adjustment,
4.14,
7.9
Home
switch
removal
and
replacement,
4. 14, 7. 9
Homing
the
carriage,
1. 7
Identification
of
machines,
7. 1
Index
of
service
checks,
adjustments
and
removals,
4.
1
Input
power
lines
to
disk storage
drive,S.
1
Interlocks,
4.20,
7. 15
Leading
particulars,
2. 1 Locations, 6. 1 Lubrication
of
machine,
3. 1
Mainenance
features, 2. 1
Mechanical
units,
~.
1
Non
particle
damage,
3.4
Particle
damage
to
disk,
3.4
Particle
damage
to
head,
3. 4
Plenum
cover
and
filter,
7.1
Plenum
air
filter
removal
and
replacement,
7.1
Plenum
cover
removal
and
replacement,
7.1
Power
line
interference,S.
1
Power
off
sequence,S.
1
Power
on
sequence,S.
1
Power
requirements,S.
1
Power
sequencing,
5.1
Purpose
of
supplement,
7. 1
Power
supply,S.
1
INDEX
Page 73
Read
malfunctions,
Read
circuit Read/write Read/write Read/write Read/write
Scheduled Scheduled Sector
transducer,
Sector
transducer
Sector
transducer
Service
aids,
Service
checks, Standard Step
control
Special
tools,
troubleshooting, heads, head
replacement,
head
service
head
to
maintenance preventive
index removal
1.
6
adjustment,
tools,
2. 3
switch,
2.
3,
1.
1
4.
17
check,
base
plate
procedures,
maintenance
4.
22
timing
and
2.2
7.
1
1.
1
4.
17
4.
17
resistance
3.1
procedures,
adjustment,
replacement,
and
removal
check,
4.
22
4.
24
procedures,
3.
4.
Spindle
assembly
Supplement
Tachometer Tachometer
17
Tachometer Tachometer Tachometer
1
Tools
and
Track
addressing, 1. 6
Troubleshooting
Visual
Write Write
inspection,
circuit malfunctions,
4.
1
removal
for
alternate
and
tachometer assembly extension extension extension
test
equipment,
base
3. 1,
troubleshooting,
and
maintenance
removal
rod
adjustment,
rod
removal
rod
removal,
plate
components,
4.3
1. 2
replacement,
extension
and
replacement,
and
2. 3
1. 2
4. 2
instructions,
rod,
4.
4.
15, 7. 10
replacement,
7. 10
1. 6
7.6
14, 7. 10
4.
15, 7. 11
4.
14
227
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International Business Machines Corporation Field Engineering Division
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