Ibm 5110 Setup guide

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IBM 5110

Computer

Maintenance Information Manual

o

,...

it)

Preface

This maintenance information manual, SY31-0550

is

intended

to

be

used

for

servicing the 5110. Service person-

nel

using this manual

are

assumed

to

have

completed the

5110 training course.

To

service the 5110,

use

this manual

with

the MAPs

(maintenance analysis procedures), SY31-0553

and

the

5110 Logic Manual, SY31-0552.

It

is

important

that

you begin

your

call

with

the Start MAP

that

leads

you

to

other

MAPs

and

eventually

to

the failing FRU (field-

replaceable

unit).

Third

Edition (February 1979)

This

is

a major revision of, and obsoletes, SY31-0550-1. Changes

or

additions

to

the

text

and

illustrations are indicated by a vertical line

to

the

left

of

the

change

or

addition.

Changes are periodically made

to

the

information herein; changes will be reported in

Technical Newsletters or in new editions of this publication.

Use

this publication only

as

an aid in servicing the

IBM

5110

system.

Publications are

not

stocked

at

the

address below. Requests for copies of

IBM

publications and for technical information

about

the system should be made

to

your

IBM

representative or

to

the branch office serving

your

locality.

This publication could contain technical inaccuracies or typographical errors.

Use

the

Reader's Comment Form

at

the back of this publication

to

make comments

about

this publication.

If

the form has been removed, address

your

comments

to

IBM

Corporation, Publications, Department 245, Rochester, Minnesota 55901.

IBM

may use

and distribute any

of

the information you supply

in

any way it believes appropriate

without

incurring any obligation whatever. You may, of course, continue

to

use the

information you supply.

©Copyright

International Business Machines Corporation

1978,1979

\ "

~./

o

0,-

o

Contents

( USING

THE

MAINTENANCE

LIBRARY

• 1·1

(

...

~

MAINTENANCE 2-1

"'/1.'_

THEORY

3-1

DIAGNOSTICS

AIOS

.

4-1

APPENDIXA.

A-1

Installation

Procedures

(

APPENDIX B. 8-1

Tools

and

Test

Equipment

APPENDIXC.

Co1

Numbering

Systems

(

APPENDIX

D•

0-1

.

11:,

Glossary

·i

( INDEX

X-1

(

iii

iv

(

~

..

J

(

The information contained in this manual

is

to

be used

as

reference material when you are diagnosing machine

failures. The maintenance information manual consists

of

location drawings, maintenance procedures, diagnostic

aids, and theory. An appendix provides information

on

installation, tools and test equipment, and numbering

systems.

The format for page numbering

is

XXX-YYY.Z; XXX

indicates

the

section number, YYY indicates

the

page

number, and Z (although

not

normally used)

is

used

to

number newly added pages when it

is

not

feasible

to

renumber previously numbered pages.

Referencing techniques used within

the

maintenance

information manual are

as

follows:

MAP

three-digit references

Page-to-page

On-page

MAP

three-digit reference numbers are assigned

to

location

drawings and maintenance procedures

that

are referred

to

in

the

MAPS

and MDls. For example,

230

refers

to

the

tape control card pin assignments. Page-to-page references

within a section refer

to

the specific page containing

the

remaining information. For example, see page 2-16. Exam-

ples

of

on-page references include

the

following: this

page, see below, etc,

or

for graphics with callouts,

to

the

specific callout.

MAINTENANCE

This section consists

of

location drawings and maintenance

procedures used

in

repairing

or

replacing field replaceable

units. The location drawings are

of

two

types: an overall

5110

reference drawing showing the major functional units,

and detail location drawings showing the FRUs within a

functional unit. Maintenance procedures consist

of

service

checks, removals, replacements, and adjustment procedures.

All

procedures and drawings have three digit reference

numbers assigned

to

them.

How This Manual

Is

Organized

THEORY

The theory section contains descriptions

of

the

5110

functional units and features. These descriptions are pre-

ceded by a system overview

that

gives you a general picture

of

the

5110

overall operation and explains

the

relationship

of

each function

or

feature

to

the

overall operation.

DIAGNOSTIC AIDS

Diagnostic program descriptions, procedures explaining

how

to

use

them,

and

the

options available when

the

programs are

in

control are found

in

this section.

MDI

information for

the

printer, diskette unit, communications,

auxiliary tape, and tape write functions are also located

here. To

further

aid

you

in

diagnosing machine failures,

a list

of

halt codes and error conditions

is

included

in

this

section. An intermittent failures procedure

is

provided

to

help you determine

the

cause

of

intermittent failures.

APPENDIXES

Several appendixes are provided for

your

use

in

servicing

the

5110. One appendix contains the installation pro-

cedures for

the

5110

and

the

5106

Auxiliary Tape Unit.

Another contains

the

tools and test equipment.

The

numbering systems used on

the

5110

are also covered

in

an appendix. A Glossary containing definitions

of

uncommon terms and abbreviations used within

the

MIM

and

MAPs

is

also

in

an appendix.

INDEX

The index

is

a detailed listing of

all

topics discussed within

the maintenance information manual.

v

The operating procedures

for

the 5110

are

found in the

following manuals:

IBM

5110System BASIC Introduction, SA21-9306

IBM

5110System APL Introduction,

SA21~9301

Information about the attachable features

is

located in the

following manuals:

IBM

5103 PrinterMaintenance Information Manual,

SY31-0414

IBM

5114 Diskette

Unit

Maintenance Information

Manual, SY31-0551

IBM

5110Serial

I/O

AdapterFeature Maintenance

Information Manual, SY31-0582

IBM

5110Parallel

I/O

Adapter Feature Maintenance

Information Manual, SY31-0583

IBM

5110Asynchronous Communications Feature

Maintenance Information Manual, SY31-0557

IBM

5110 Binary Synchronous Communications

Feature Maintenance Information Manual, SY31-0558

The logic diagrams

for

the 5110 Computer, 5114 Diskette

Unit,

5103 Printer, 5106 Auxiliary

Tape

Unit,

and other

attachable features

are

located in the IBM 5110 Logic

Manual, SY31-0552.

vi

"'-,

)

'"'

,/

( \

(

J

(

CE

SAFETY

PRACTICES

All

Customer

Engineers are

expected

to

take

every safety

precaution

possible

and

observe

the

following

safety

prac·

tices

while

maintaining

I

BM

equipment:

1.

You

should

not

work

alone

under

hazardous

conditions

or

around

equipment

with

dangerous voltage.

Always

advise

your

manager

if

you

MUST

work

alone.

2.

Turn

off

all

ac

and

dc

power

when

removing

or

assembling

major

components,

working

in

immediate

areas

of

power

supplies,

performing

mechanical

inspection

of

power

supplies,

or

installing

changes

in

machine

circuitry.

3.

After

you

have

turned

off

the

wall

box

power

switch,lock

it

in

the

Off

position

or

tag

it

with

a

"Do

Not

Operate"

tag,

Form

229-1266.

Pull

power

supply

cord

whenever

possible.

4.

When

it

is

absolutely

necessary

to

work

on

eqUipment

having

exposed

operating

mechanical parts

or

exposed

live

electrical

cirCUitry

anywhere

in

the

machine,

observe

the

following

precautions:

a.

Another

person

familiar

with

power

off

controls

must

be in

immediate

vicinity.

b.

Do

not

wear rings,

wrist

watches,

chains, bracelets,

or

metal

cuff

I

inks.

C.

Use

only

insulated

pliers

and

screwdrivers.

d. Keep one

hand

in

pocket.

e.

When using test

instruments,

be

certain

that

controls

are set

correctly

and

that

insulated

probes

of

proper

capacity

are used.

f.

Avoid

contacting

ground

potential

(metal

floor

strips,

machine

frames).

Use

suitable

rubber

mats,

purchased

locally

if

necessary.

5. Wear safety glasses

when:

a.

Using a

hammer

to

drive

pins,

riveting,

staking.

b.

Power

or

hand

drilling,

reaming,

grinding.

C.

Using

spring

hooks,

attaching

springs.

d.

Soldering,

wire

cutting,

removing

steel bands.

e.

Cleaning

parts

with

solvents,

sprays,cleaners,

chemicals.

f.

Performing

any

other

work

that

may

be hazardous

to

your

eyes.

REMEMBER

-

THEY

ARE

YOUR

EYES.

6.

Follow

special safety

instructions

when

performing

special·

ized tasks, such

as

handling

cathode

ray tubes

and

extremely

high

voltages. These

instructions

are

outlined

in

CEMs

and

the

safety

portion

of

the

maintenance

manuals.

7.

Do

not

use solvents, chemicals, greases,

or

oils

that

have

not

been

approved

by

IBM.

B.

Avoid

using

tools

or

test

equipment

that

have

not

been ap·

proved

by

IBM.

9. Replace

worn

or

broken

tools

and

test

equipment.

10.

Lift

by

standing

or

pushing

up

with

stronger

leg

muscles-

this

takes

strain

off

back

muscles.

Do

not

I

ift

any

equip·

ment

or

parts

weighing

over

60

pounds.

11. A

iter

maintenance,

restore

all

safety

devices, such

as

guards,

shields, signs, and

grounding

wires.

12.

Each

Customer

Engineer is

responsible

for

making

sure

that

no

action

on

his

part

renders

products

unsafe

or

exposes

customer

personnel

to

hazards.

13. Place

removed

machine

covers

in

a safe

out·of·the·way

place

where

no

one

can

trip

over

them.

14. Ensure

that

all

machine

covers are

in

place

before

returning

machine

to

customer.

15.

Always

place CE

tool

kit

away

from

walk

areas

where

no

one can

trip

over

it;

for

example,

under

desk

or

table.

Safety

16.

Avoid

touching

moving

mechanical

parts

when

lubricating,

checking

for

play.

17. When using

stroboscope,

do

not

touch

ANYTHING-

It

may

be

moving.

18.

Avoid

wearing

loose

clothing

that

may

be

caught

in

mao

chinery.

Shirt

sleeves

must

be

left

buttoned

or

rolled

above

the

elbow.

19. Ties

must

be

tucked

in

shirt

or

have a

tie

clasp

(preferably

nonconductivel

approximately

3 inches

from

end.

Tie

chains are

not

recommended.

20.

Before

starting

equipment,

make

certain

fellow

CEs and

customer

personnel

are

not

in

a

hazardous

positIOn.

21.

Maintain

good

housekeeping in area

of

machine

while

per·

forming

and

after

completing

maintenance.

Knowing

safety

rules is

not

enough.

An

unsafe

act

will

inevitably

lead

to

an

accident.

Use

good

judgment·

eliminate

unsafe acts.

ARTIFICIAL

RESPIRATION

General Considerations

1.

Start

Immediately

-Seconds

Count

Do

not

move

the

victim

unless

absolutely

necessary

to

remove

from

danger.

Do

not

wait

or

look

for

help,

or

stop

to

loosen

clothing,

warm

the

victim,

or

apply

stimulants.

2.

Check

Mouth

for

Obstructions

Remove

foreign

objects. Pull

tongue

forward.

3.

Loosen

Clothing

-Keep

Victim

Warm

Take

care

of

these

items

after

the

victim

is

breathing

by

himself

or

when

help

is

available.

4.

Remain

in

Position

After

victim

revives, be ready

to

resume

respiration

if

necessary.

5. Cali a

Doctor

Have someone

summon

medical

aid.

6.

Don't

Give

Up

Continue

without

interruption

until

victim

is

breathing

without

help

or

is

certainly

dead.

Rescue Breathing for Adults

1.

Place

victim

on

his

back

immediately.

2.

Clear

throat

of

water,

food,

or

foreign

matter.

3.

Tilt

head back

to

open

air

passage.

4.

Lift

jaw

up

to

keep

tongue

out

of

air

passage.

5. Pinch

nostrils

to

prevent

air

leakage

when

you

blow.

6.

Blow

until

you

see

chest rise.

7.

Remove

your

lips and

allow

lungs

to

empty.

B.

Listen

for

snoring

and

gurglings -signs

of

throat

obstruc·

tion.

9.

Repeat

mouth

to

mouth

breathing

10·20

times

a

minute.

Continue

rescue

breathing

until

victim

breathes

for

himself.

Thumb

and

finger

pOSitions

Final

mouth-to-

mouth

position

vii

viii

(

*-

.'

" (

5110

MAINTENANCE

LIBRARY

IBM

5110

Computing

System Publications

Maintenance

Library

Contents

MAPs.

MAP

Organization

Using the MAPs .

MAP

Example

MAINTENANCE

INFORMATION

MANUAL

Maintenance .

Theory

Diagnostic Aids

Appendixes

Index.

"

,

1·2

1·3

1·5

1·6

1·7

1·8

1·9

1·11

Contents

1·1

5110

Maintenance library

The 5110 maintenance library (MLM) consists

of

mainte-

nance analysis procedures (MAPs), maintenance informa-

tion

manuals

(M

IMs), 5110 logic manual, parts catalogs

(PCs), and diagnostic tools.

These

publications and diag-

nostic tools

are

all contained in II single binder.

r--

~

,.--

~

I-

MAPs

...--

MIMs

---

LOGICs

PCs

-=-

The diagnostic tools contained in the 5110

MLM

are:

Diagnostic tape cartridge

Diagnostic diskette

Logic board jumpers

Wrap connectors

Cartridge stop

gauge

The

following

chart shows the relationship between the

publications contained in the maintenance library

and

some other related publications. The related publications

contain the operating procedures and language

information

(APL-A

Programming Language, BASIC-Beginners AI/-

Purpose Symbolic Instruction Code)

for

the 5110.

1-2

/

/ '

..

('

/

{

If

(

IBM 5110 COMPUTING SYSTEM PUBLICATIONS

r

-..-.

--

- - - - - - - - - - - - - - - - - - -

--

- - - - - - - - - - - - - - - - - - - - - - .

SY31·0552

5110 System

Logic Manual

SY31·0553

5110

MAPs

SY31·0550

5110

MIM

Maintenance Library

SY31·0551

5114

MIM

SY31·0414

5103

MIM

,------'

d.0627

~

"31-0600

S131·0626

S131·0598

SY31-0581

Language

Support MIM

5110

PC

5106

PC

SY31·0557

Async Comm

MIM

~-----!-------

------

ISA21·9306

BASIC

Introduction

SA21·9308

BASIC

Reference

L'-----r----J

SA21·9307

BASIC User's

Guide

I SA21·9301

APL

Introduction

SA21·9303

APL

Reference

SA21·9302

APL

User's

Guide

5114

PC

SY31-0582

Serial

I/O

MIM

Maintenance

Related Publications

TSY31·0558

BSCA

MIM

5103

PC

1SY31-0583

Parallel

I/O

MIM

5110

Maintenance Library 1·3

When

necessary,

MAPs

and

MIMs

are updated

to

provide

the latest informtion for diagnosing 5110 problems.

Updates

to

these documents are made through technical

newsletters

(TN

Ls)

or

periodic major revisions. It

is

important

that

the

MAPs

and

MIMs

be

at compatible

levels. Never mix publications from system

to

system;

always use the publications shipped with the system.

The contents

of

the entire 5110 maintenance library are

shown

in

the chart on the following page. Notice

that

the

chart lists the topics alphabetically. The numbers

or

letters

to

the right

of

the topics indicate the section or appendix

containing the information. Look

at

the column heading

at

the

top

of

the chart

to

determine the publication

that

contains the information.

1-4

(

',,-

,

--#-,

(

f

(

("

(/

MAINTENANCE LIBRARY CONTENTS

Circuits

Communications

Asynchronous

Binary Synchronous

Character Code Chart

Diagnostic Aids

Glossary

Installation Procedures

Logic Card Part Numbers

And Jumpering

Maintenance

MAPs

Bring

Up

Cable Checkout

Communications

Diskette

Read

Diskette

Unit

Display

Keyboard

Machine Checkout

Parallel

I/O

Power

Process

Check

Serial

I/O

Start

Tape

Read

TV

Monitor

5103 Printer

5106

Auxiliary

Tape

Numbering Systems

Print Character

Information

Preventive Maintenance

Theory

Tools and Test

Using the Maintenance

Library

050

400

210

830

310

880

500

600

900

830

700

420

830

200

300

510

810

850

4

D

A

2

C

3

B

100 1

C

A

2

3

D

A

B

C

3

x

X

Publication/Section Number

x

X

x

A

5110

Maintenance

Library

1-5

MAPs

The

MAPs

guide you through

the

service call using step-by-

step procedures

that

require you

to

follow trace lines when

responding

to

questions or when leaving

or

entering a page.

The

MAPs

use a logical approach for isolating

the

possible

causes

of

machine problems and point you

to

that

part

of

the

5110

that

requires adjustment

or

replacement.

Two types of

MAPs

are used

in

the

5110 maintenance

library. First, there are

the

hard-copy (printed)

MAPs

within

the

MLM

binder. These

MAPs

are contained

in

a

separate removable binder. The second type

of

MAP

is

the

MOl

(MAP

diagnostic integration). These

MAPs

are

located on

the

diagnostic tape/diskette and are shown on

the

display screen. The system automatically pages

through the

MAPs

when you respond

to

the questions on

the

display.

1-6

'--

.

./

..

(

MAP

ORGANIZATION

START

Start

MAP

200

Record the Error Code Displayed

Diagnostic

Aid

Section

For Intermittent Failures

----+---------"""T""---l~

~============~

Indicator Lights-Use

MAP

200 System Function Test

MAP

400-Bring

Up

Bring

Up

Diagnostic Failures

---+-----------I~

~============~

MAP

420-Process Check

Process

Checks--------+-----------I~

~--------------------------~

MAP

500-Display

Display Failures

-------1------------...--

...

~============~

Other Reported Failures

----I-----------i)

No

Symptoms

--------+---------,

Begin

each call with Start

MAP

200. This

MAP

ensures

that

the system

is

operating sufficiently

to

use

other

MAPs

or

MDls.

Start

MAP

200 asks you

to

record the status bytes,

error logs, and history

logs

because this information

is

lost on power down or RESTART. The

Start

MAP

either fixes or directs you

to

a

MAP

that

tells you how

to

fix any

of

the following problems:

Indicator lights

Bring up failures

Process checks

Display failures

For other failures, the Start

MAP

directs you

to

the cor-

rect

MAP

through an error code.

If

you are certain the

failures

is

not covered

in

the

Start

MAP,

you

canA

directly

to

the other

MAPs

as

indicated by the

~

in

the chart.

All

MDls

have a

MAP

as

an

entry. For example,

MAP

810-5103

is

an entry for

MDI

800 through 805. These

MAPs

provide the setup instructions for running the

MDls.

The

MDls

are a combination of

MAPs

and diagnostics.

The MDls

call

in

and run the appropriate diagnostics

and answer most of the

MAP

questions automatically.

The procedures for diagnosing intermittent failures

contain a more detailed description of what part of the

system each

MDI

checks.

MAP

300-

Tape Read

MAP

310-Diskette

Read

I

L-

..

I

MDI

860,861

MAP

700-Power

MAP

510-

TV Monitor

MAP

600-Keyboard

MAP

810-5103

I

l_

~

MDI

800,801,802,803,804,805

MAP

830-Communications, SID,

PIO

MDI821-BSCA

MDI

820-Asynchronous Communications-

Serial I/O

MDI

823-Parallel I/O

MDI

890-Communications Routines

I I

MAP

850-5106

I

L_

~

MDI

840

through 847 and

860,861

MAP

880-Diskette

Drive

MDI

881 through

888

MAP

gOO-Checkout Procedures

MAPs 1-7

USI

NG

THE MAPS

When using

the

MAPs,

you

must:

READ CAREFULLY. The

MAPs

can help

you

find

the

problem only if you follow instructions and answer

questions accurately.

FOLLOW THE SEQUENCE. Proceed step-by-step

at

all

times.

At

times,

the

MAP

instructions might seem irrele-

vant. However,

they

can be

important

in

determining

the

correct

error indications.

FOLLOW INSTRUCTIONS. Instructions must be carried

out

exactly in

the

order given. Questions are based on

instructions immediately preceding

the

questions. Do

not

change

the

conditions established

by

the

instructions

before answering

the

questions. Do

not

press

the

RESTART switch until you are told

to

do

so in

the

MAPs.

When you are asked

to

probe a line

in

the

MAPs,

the

line

name and its active level are given. For example:

-Probe H2-G06

(-

machine check).

The -(minus)

in

front

of

machine check indicates

that

this

line

is

active

at

a down level.

1-8

j

/---

/

('

(

,-

(

~.

--...

~

."-

~-~

(

MAP EXAMPLE

PROCESS CHECK

MAP

0420 _

_

--------~;:~:=::=:::a~

MAP

name

and

number

Entry and

exit

points show all entry and

exit

points

to

PAGE 1

OF

75

ENTRY

POINTS

FROM

ENTER

THIS

MAP

NUMBER

0200

0300

0600

0810

0830

0850

0900

830C

ENTRY

POINT

A

PAGE

NUMBER

STEP

NUMBER

001

and from this MAP.

EXIT

THIS

MAP

TO

PAGE

STEP

MAP

ENTRY

NUMBER

POINT

5 044 0400 A

18

218 0400 A

75

828 0500 A

001 Step number

(Entry

Point

AI

--------

_______

Entry point-indicates a possible starting

point

in this

Is

the

PROCESS

CHECK

light

on7

YN-----------------------------

002

Can

you

create

the

PROCESS CHECK7

Y N

003

The MAPs depend on having the PROCESS

CHECK on the machine

or

being able

to

create the PROCESS CHECK. Gather and

record all available information pertaining

to

the PROCESS CHECK. Advise the

customer

that

if

the PROCESS CHECK

appears again,to leave the machine in the

failing condition until you arrive.

004

Is

the

PROCESS

CHECK

intermittent7

Y N

222

ABC

MAP.

It

is

usually referenced from a step

within

a

MAP.

Y=yes, N=no

Off-page reference-identifies the

page

and

trace on

which this MAP

leg

continues. The 2 indicates

that

this

leg

continues on

page

2.

The C indicates

that

this

leg

continues at trace

C.

MAPs 1-9

MAP

EXAMPLE (continued)

ABC

PROCESS CHECK

MAP

1 1

1--

__

PAGE

2

OF

75

005

Create

the

PROCESS

CHECK.

Did

the PROCESS

CHECK

come on

as

a

result

of

pressing RESTART or powering

-On-page reference-indicates the trace and page from

which this

MAP

leg

came. The 1 indicates

that

this

leg

came from page

1.

The C indicates

that

this

leg

came from trace

C.

J

on the 5110? T

V N

/ "

~

We

will

assume

that

the

PROCESS

CHECK

comes

on

as

a result of running

a job.

Go

to

Step

010,--------------lnternal

exit point-indicates the page, step, and entry

Entry

Point

H.

point

to

go

to

within this

MAP.

007

We

will use

the

RESTART

condition

to

create

the

PROCESS

CHECK.

Go To

Map

0400, Entry Point

A.

---------

External exit point-indicates the

MAP

and entry

point

to

go

to.

OOS

Create the PROCESS CHECK

-------------Instruction-establishes

conditions for answering the

Go

to

the INTERMITTENT FAILURE CHART next question.

in

the 5110 SERVICE AIDS.

009

Is

the

PROCESS CHECK

intermittent?--------Question-answer

either yes or no. Continue from

V N your answer

to

the next question or instruction.

010

(Entry

Point

H)

Bad

RESTART switch.

-------------

Action-possible fixes for the failure. Replace, repair,

Check/repillce Z3 (display and control panel) or adjust

in

the order given. (Check/replace means

to

cable

(see

MAP

0210 and

MIM

210, 241). check first, then replace

if

defective.)

Is

the

display

blank

or

dark?

V N

011

~.-----

Reference number-refers

to

a loclltion graphic, .

Are there

~ny

devices attached to

th~

maintenance procedure, chart, or other pertinent

5110

I/O mterface port? (see

MIM

information

in

the maintenance section.

271)

V N

771

558

o E F

G-

1·10

_____ On-page reference-indicates the trace on this page

from which this

leg

of

the

MAP

continues. /

",-,.

./"

\"..

/

( Contents

LOCATIONS. 2-2 Centering. 2-32

( 200 Covers 2-2 Horizontal 2-33

201

5110 Model X1

X.

Functionsl Units . 2-3 Vertical 2-33

2::125110 Functional Units_ 2-5 248

Display-Z3

Socket Pin Assignments. 2-34

203 Tape

Unit

2-6 249 Display and Control

Panel

Cable . 2-35

204 Display 2-7

KEYBOARD.

2-36

-,.'

205 Keyboard and Control

Panel

2-8 250 Key

Codes

2-36

206 Keyboard 2-9

251

Keyboard 2-37

0"

--

207 AC

Box.

2-10 Removal 2-37

( 208 Power Supply

2-11

Disassembly 2-37

209

A1

Board (card side) 2-12 Cleaning 2-37

211

5106

Auxiliary

Tape

Unit.

2-13 252 Spacebar. 2-38

TAPE.

2-14 Removal 2-38

f 220 Jackshaft Housing 2-14 Installation 2-38

Service Check 2-15 253 Key

Module.

2-38

Adjustment 2-15 Removal 2-38

221

Forward and Reverse Select Magnets 2-16 Installation 2-38

Service Check 2-17 254 Flyplate Replacement. 2-39

Adjustment 2-17 255

Keyboard-Z4

Socket Pin Assignments 2-40

222 Locking Wheel Assembly 2-19 POWER

2-41

Adjustment 2-19 270

CE

Meter Calibration Check

2-41

223 Cartridge

Stops.

2-20

271

Power Supply 2-42

Service Check 2-20 Removal 2-42

Adjustment 2-20 Replacement . 2-42

224 Tape Switch Assembly. 2-21 272

Power-

Y1

Socket Pin Assignments 2-44

( Service Check 2-21 273

AC

Voltage

Distribution

2-45

Adjustment 2-21 274 DC Voltage

Distribution

2-46

225 Read/Write Head 2-23

FEATURES.

2-48

Removal 2-23 280

I/O

Interface Cable Pin Assignments. 2-48

Replacement • 2-23 282 Async

Comm/Seriall/O

Adapters-Z1

Socket

Adjustment 2-23 Pin Assignments 2-50

Cleaning 2-23

2835106

Auxiliary

Tape

I/O

Interface Connector 2-52

226

LED

and PTX Assembly 2-23

2845106

Auxiliary

Tape

AC

Voltage Distribution 2-53

Removal 2-23 285

BSCA-Y2

Socket and Wrap Connector Pin

Replacement. 2-23 Assignments 2-54

227

Motor

Pulley 2-24 286 Parallel

1/0-Y3

Socket and Wrap Connector

Service Check 2-24 Pin Assignments 2-56

( Adjustment 2-24

IBM

5103 Printer 2-58

228 Tape Positioning and

Rewind.

2-25

IBM

5114 Diskette

Unit

2-59

Manual Tape Positioning 2-25

-(

Loose Tape

Rewind.

2-25

229 Tape Rethreading 2-26

--'"

-,

230 Tape Control Card Pin Assignments . 2-27

231

Internal Tape

Unit-Z2

Socket Pin Assignments 2-28

DISPLAY.

2-29

240 Display Removal 2-29

-(:.!

Removal 2-29

241

Brightness

Control.

2-30

( 242 Reverse Display Switch 2-30

243 Display Registers/Normal Switch. 2-30

244 L32-64-R32 Switch 2-30

245 Restart Switch and Lamp Test 2-30

246

Basic-AP

L Switch . 2-30

247 Display Raster Adjustments 2-31

Brightness 2-31

-"

Focus.

2-31

(-

Contents

2-1

2-2

D TopCover

fJ

Front

Cover

II

Base

II

Top

Cover

Screws

II

Front

Cover

Screws

;"'f

IBM 5110 Setup guide

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