IBM 3278 Setup guide

==i:.= =
§ ~ ~';'§: Maintenance Library
3278
Display Station
Models
1, 2, 3; 4, and, 5
Maintenan.ce Information
.' SY27-2510-6

Seventh Edition (January 1981)
This
is a revision of SY27-2510-5, which is now obsolete.
It incorporates minor technical changes. Changes or additions
to the text and illustrations are indicated by a vertical line
to the left of the change. Information in this manual is sub-
ject to change from time to time; any such change will be
reported
in subsequent revisions or Technical Newsletters.
The drawings and specifications contained herein shall
not
be reproduced in whole or in part without written permission.
IBM has prepared this maintenl!nce manual for the use of
IBM customer engineers in the installation, maintenance, or
repair
of the specific machines indicated. IBM makes no
representations
that it is suitable for any other purpose.
It is possible that this material may contain reference to, or
information about, IBM products (machines and programs),
programming,
or services that are not announced in your
country. Such references
or information must not be con-
strued
to mean that IBM intends to announce such IBM
products, programming, or services in your country.
Requests for copies of
IBM publications should be made to
your I BM representative or to the I BM branch office ser-
vicing your locality.
A form for readers' comments
is provided at the back of this
publication.
If the form has been removed, addres~ comments
to IBM Corporation, Department 52Q, Neighborhood Road,
Kingston, N.Y., U.S.A. 12401.
IBM may use or distribute
any of
the information you supply in any way it believes
appropriate
without incurring any obligation whatever. You
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of course, continue to use the information you supply.
©Copyright International Business Machines Co.rporation
1977,1978, 1979, 1980, 1981
ii
SY27-2510-6

Preface
This publication contains the information needed to
service and maintain the IBM 3278 Display Station
Models 1, 2, 3, 4, and 5. Part numbers for
the
usually needed field replaceable units (FRUsI are
given in Chapter
4; keyboard assembly FRUs are
given
in paragraph 6.7 (Chapter 61. Additional in-
formation on the ordering of parts is contained in
the IBM 3278 Display Station Parts Catalog, order
number S126-0020.
Organization
This publication has seven chapters:
• Chapter 1 is a brief introduction to the 3278
and to the maintenance plan for the 3278.
• Chapter 2 contains the maintenance analysis pro-
cedures (MAPs).
• Chapters 3 through 7 contain reference material
that supports the MAPs.
Appendix A, Glossary, defines terms used in this
publication.
Starting Point
The starting point for
all failure isolation on the
3278 is MAP 00, Start/Restart MAP.
SY27-2510-5
(1/81) iii

Contents
Chapter 1. Introduction 1·1
1.1 General 1-1
11.1.1 Magnetic
Slot Reader
1-3
1.1.2 Selector Pen 1-4
1.1.3
APL!Text 14
1.1.4 Electrical Grounding
14
1.1.5 Equipment Lightning Protection
1.2
Maintenance Plan 1-6
1.3 Operation Tests 1-6
1.4 FRU
Swapping
1-6
1.5
MAPs 1-6
Chapter 2. MAPs 2-1
MAP 00, Start/Restart MAP 2-00-1
Symptom/Repair List 2·00-3
MAP 01, Terminal Failure MAP 2·01·1
MAP 02, Display MAP 2·02·1
MAP 03, Keyboard MAP 2-03-1
MAP 04, Feature Error
MAP 2-04-1
1-5
MAP
05, System Indicated Failure MAP 2·06-1
Chapter 3. Maintenance Aids 3-1
3.1
Introduction 3-1
3.2 Switches and Indicators 3-1
3.3 Operation Tests 3-1
3.3.1 Offline Tests 3-1
3.3.1.1 Test Mode 1 3-2
3.3.1.2 Test Mode 2 3-6
3.3.1.3 Test Mode 3 3-9
3.3.2 Online Tests 3-19
3.3.2.1 Requesting Online Tests 3-20
3.3.2.2 Test 0, Display Operation 3-22
3.3.2.3 Test 1, Error Log Display 3-26
3.3.2.4 Test 8, PS Feature Test Pattern 3-30
3.3.2.5 Error Log/Repair Action 3-31
Chapter 4. Locations (See Figures) 4-1
Chapter 5. Display Image Adjustments 5-1
5.1 Yoke Alignment and Centering 5-1
5.1.1 Remove Cone Sh ield 5-1
5.1.2 Yoke Alignment 5-1
5.1.3 Centering and Horizontal Width 5-3
5.1.4 Reinstall Cone Shield 5-3
5.2 Analog Card
Adjustments 5-3
5.3 Focus Adjustment 5-4
5.4 +44 V Power Supply Adjustment Procedures 5-4
Chapter 6. Removals and Replacements 6-1
6.1 Covers 6-1
6.2 Power Units 6-1
6.2.1 Low-Voltage Power Supply 6-1
6.2.2 AC Capacitor 6-2
6.2.3 Prime Power Box 6-2
6.2.4 Ferrotransformer 6-2
SY27-2510-6 (1/81 ) v

6.2.5 High-Voltage Power Supply 6-3
6.2.6 Fuses 6-3
6.2.7 Card/Connector Removal and Replacement
Procedures 6-3
6.2.7.1 Internal Connectors 6-4
6.2.7.2 Internal Coax 6-4
6.2.7.3 Cards 6-4
6.2.8 Circuit Board Segments 6-5
6.3
CRT 6-5
6.4 Yoke and Shields 6-7
6.5 Operator Controls 6-8
6.5.1
CRT Frame Assembly 6-9
6.5.2 On/Off Switch 6-9
6.5.3
Intensity and Contrast Controls 6-9
6.5.4 Indicator Card Assembly 6-9
6.5.5 Switches 6-9
6.6 OPtional Features 6-10
6.6.1 Audible Alarm 6-10
6.6.2 Security Keylock 6-10
6.7 Keyboard Units 6-10
6.7.1 Keyboard from Display Station 6-11
6.7.2 Keyboard Top Cover 6-11
6.7.3 Keyboard Assembly from Base 6-11
6.7.4 Clicker Assembly 6-12
6.7.5 Keybutton 6-12
6.7.6 Key Module 6-12
6.7.6.1
6.7.6.2
6.7.7
6.7.8
6.8
Key Module Removal (Including Spacer
Module) 6-12
Key
Module Replacement 6-13
Spacebar 6-14
Logic Card Assembly 6-14
Selector Pen 6-15
Chapter 7. Magnetic Slot Reader Information 7-1
Appendix A. Glossary A-1
vi SY27-2510-6

Figures
1-1 3278 Field Replaceable Units, (D) Type 1-1
1-2 3278 Field Replaceable Units, (M) Type 1-2
1-3 IBM
3276/3278 Problem Report Form 1-8
3-1 Test Patterns 3-3
3-2
Japanese Katakana Test Patterns 3-4
3-3
Japanese English Test Patterns 3-5
4-1 Switches and Indicators 4-1
4-2 Switches and Indicators (Katakana) 4-2
4-3 Lower Frame 4-3
4-4 Upper Frame 4-4
4-5
CRT and CRT Frame Assembly 4-5
4-6
Card Locations, (D) Type 4-6
4-7 Card Illustrations 4-8
4-8 Card Locations, (M) Type 4-9
4-9
Card Illustrations, (M) Type 4-11
4-10 Keyboard 4-12
4-11
Fuse Locations-Low-Voltage Power Supply 4-13
4-12 Prime Power and
DC Voltage Distribution 4-14
4-13 Operator Controls 4-15
4-14 Operator Controls and Indicators 4-16
4-15 Feature Cabling 4-17
4-16 Logic Gate
to Keyboard Cables 4-18
4-17
DC Power Distribution 4-19
5-1 CRT and High-Voltage Power Supply 5-2
5-2 Yoke Adjustments 5-2
5-3
Yoke Grounding Clips 5-2
SY27-2510-6 11/81)
vii

Safety Notices
IDANGER,
IDANGER:
I DANGER:
I DANGER:
IDANGER,
All power unit removal and
replacement procedures must be
performed with power turned off and
with
the power cord disconnected.
All persons handling a CRT or who
are near an exposed CRT under
vacuum must wear safety glasses and
long-sleeved garments.
High voltage can be present when
Indicator 2 is off.
Safety glasses must be worn when you
are working on
the machine with
power on
or off.
Voltages are present
in the heat sinks
on the analog card when the power is
on. Also, be careful when removing
this card because
the heat sinks will
be hot (at high temperatures).
I DANGER: Ferrocapacitor
01D/Cl is grounded
only when
the capacitor is retained by
its mounting spring.
The machine frame
is grounded only
when
the prime power assembly
010/ A1 is mounted and fastened in
place.
The ferrotransformer assembly 01D/T1
is grounded only when it is mounted
and fastened
in place.
Caution: The CRT weighs
about 7.25 kg (16 pounds).
Protect and support
the CRT when removing and
replacing it
to prevent damage to the CRT and other
units.
Caution: The 3278 must be off before cards and
cables are reseated
or swapped. Be careful not to
loosen cards or cables when working on the 3278.
This could cause intermittent failures then
or at a
later time.
Caution: The indicator above
the ON/OFF switch is
not a primary Power On indicator. Machine voltage
may
be present when this indicator is off.
Caution: Do not connect or disconnect
the device
cables during an electrical storm.
viii SY27·2510-6

CE SAFETY PRACTICES
All Customer Engineers are expected to take every safety
precaution possible and observe the following safety
practices while maintaining IBM 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. Remove all power AC and DC when removing or
assembling major components, working in immediate
area of power supplies, performing mechanical
inspection of power supplies and installing changes in
machine circuitry. Pull the power plug from the
receptacle to remove power source.
3. Wall box power switch, when used to disconnect
power, should be locked or tagged in off position. "Do
not Operate" tags, form 229-1266, should be securely
attached to power switch or to outside of power box.
4. When it is absolutely necessary to work on equipment
having exposed operating mechanical parts or exposed
live electrical circuitry anywhere in the machine, the
following precautions must be followed:
a. At least one other person familiar with power off
controls, emergency power off procedures, and the
location of the wall box power switch, must be in
the
immediate vicinity at all times.
b. Rings, wrist watches, chains, bracelets, metal cuff
links, shall not be worn.
c. Only insulated pliers and screwdrivers shall be used.
d. Keep one
hand in pocket.
e. When using test instruments be certain they are of
proper capacity and controls are set correctly.
Only insulated probes are used.
f.
Avoid contacting ground potential (metal floor
strips, machine frames, etc. - use suitable rubber
mats purchased locally if necessary).
5. Safety Glasses must be worn when:
a. Using a hammer to drive pins, riveting, staking, etc.
b.
Power hand drill ing, reaming, grinding, etc.
c.
Using spring hooks, attaching springs.
d.
Soldering, wire cutting, removing steel bands.
e. Parts cleaning, using solvents, sprays, cleaners,
chemicals, etc.
f. All other conditions that may be hazardous to your
eyes. REMEMBER, THEY ARE YOUR EYES.
6. Special safety instructions such as handling Cathode
Ray Tubes and extreme high voltages, must be followed
as outlined in CEM's and Safety Section of the
Maintenance Manuals.
7. Do r.ot use solvents, chemicals, greases or oils that have
not been approved by IBM.
8. Avoid using tools or test equipment that have not been
approved by IBM.
9. Replace worn or broken tools and test equipment.
10. The maximum load to be lifted is that which in the
opinion of you and management does not jeopardize
your own health or well-being or that of other
employees.
SY27-2510-6 (1/81 )
ix

11. All safety devices such as guards, shields, signs, ground
wires, etc., shall be restored after maintenance.
12. Each Customer Engineer is responsible to be certain
that no action on his part renders product unsafe or
exposes hazards to customer personnel.
13. Place removed
machine covers in a safe out·of-the-way
place where no one can trip over them.
14. All machine covers must be in place before machine is
returned to customer.
15. Always place CE tool kit away from wal k areas where
no one can trip over it !i.e., under desk or table).
16. Avoid
to~ching mechanical moving parts (i.e., when
lubricating, checking for play, etc.).
17. When using stroboscope - do not touch ANYTHING -
it
may be moving.
18. Avoid wearing loose
clothing that may be caught in
machinery. Shirt sleeves must be left buttoned or
rolled above
the elbow.
19. Ties must be tucked in shirt or have a tie clasp
(preferably
nonconductive) approximately 3 inches
from
end. Tie chains are not recommended.
20. Before powering up or starting equipment, make
certain other CEs and customer personnel are not in
a hazardous position.
21. Maintain good
housekeeping in area of machines while
performing and after completing maintenance.
22. Even though preventive measures are taken, accidents
do occur. CEs and support personnel should be
prepared to follow emergency first aid procedures as
outlined below.
First
Aid -General
1. If accidental electrocution occurs:
a.
Remove power source before touching victim.
b. If
power cannot be removed, pull victim away from
equipment by using non-conductive material such
as a
broom handle, leather belt, or necktie.
c.
Immediately begin rescue breathing; see below.
d. Begin CPR if necessary
and only if trained person is
available.
e. Call a
doctor.
Have someone summon medical aid.
f. Remain in position.
After victim revives, be ready to resume respiration
if necessary.
2.
For serious injury:
a.
Summon medical aid.
b. Do
not move victim unless absolutely necessary to
remove from danger.
c.
Attempt to stop serious bleeding by using pressure
points or a pressure bandage.
d. Loosen
clothing and keep victim warm.
Artificial Respiration
General Considerations
x
1. Start Immediately, Seconds Count
Do not wait or look for help or stop to loosen clothing,
warm the victim or apply stimulants.
SY27-2510-6

2. Check Mouth for Obstructions
Remove foreign objects -Pull tongue forward.
Rescue Breathing for Adults -Place
Victim on His Back Immediately
1. Clear throat of water, food, or foreign matter.
2. Tilt head back to open air passage.
3. Lift jaw up to keep tongue out of air passage.
4. Pinch nostrils
to prevent air leakage when you blow.
5. Blow until
you see chest rise.
6.
Remove your lips and allow lungs to empty.
7. Listen for snoring and gurglings, signs of throat
obstruction.
8. Repeat mouth to mouth breathi,i'gs 10-20 times a
minute. Continue rescue breathing until he breathes
for himself, or medical aid arrives.
Thumb and
finger positions
~
inalmouth
o mouth
" position
. -..:....
SY27-2510-6 (1/81)
xi

Chapter 1. Introduction
1.1 General
The
IBM 3278 Display Station must be attached to a
port of the IBM 3274 Control Unit or of the IBM
3276 Control Unit Display Station (or other compat-
ible controllers) by a coaxial cable. The 3278 con-
tains field replaceable units (FRUsl. as shown in
Figures ,-, and '-2.
Coax
Timing and
Control
Base 3 E2
__ ....:C~a=-bl~e __ ~ Input/Output
Serdes
Storage/
Storage Co ntro I
MSR Card
Magnetic
Base 1 G2
Feature
Logic
Base 1 G2
Selector
Pen Card
Selector
Pen
Slot Reard_e _r ---1_---.
RA PS ECS Card
RAMC2
D2
Base 2 F2
Character
Generator
and Video
Output
Base 3 E-2
Analog
H2
APL/Text
ROS Module
(Pluggable Module)
Figure 1-1. 3278 Field Replaceable Units, (0) Type
SY27-2510-6 (1/81)
1-1

Coax
Cable
MSR Card
B4
Magnetic
Line
Control
Base 1 G2
Selector
Pen Card
G4
Selector
Pen
Slot Reader
r---'-----,
RAM PS ECS Card
RAM D2 E2
Timing
Base 1
G2
Storage Control
Feature Logic
Character
Generator
Base 2 F2
Video
Output
H2
APL!Text
ROS Module
(Pluggable Module)
Figure
1-2_ 3278 Field Replaceable Units, (M) Type
1-2 SY27-2510-6

There are two configurations of the logic for the 3278
Display Station. The first is the (D) type, shown in
Figures 1-1,4-6, and 4-7. Three base logic cards are
used
in this configuration: base 1 (G2), base 2 (F2),
and base 3 (E2). The second configuration,
the (M)
type, shown in Figures 1-2,4-8, and 4-9, has two base
cards: base 1 (G2) and base 2 (F2). Note
the new
locations
of the feature cards when present with the
second configuration.
The
3278 Display Station Model 5 has the (M) config-
uration only, and can display either an 80- or a 132-
character line. The offline test describes
the method
for testing and aligning
the Model 5.
The
(D) type basic logic is packaged on three cards,
one 2WX3H and
two 4WX3H, and contains basic
functions as follows:
Base card 1-01A/A1G02
Interface to coax, command decode and gates, and
paths to features.
Base card 2 - 01A/A1F02
Storage, counters, and storage control.
Base card 3 - 01A/A 1E02
Character generator,
dot character line and row
counters, video serializer, and control.
The (M) type base logic is packaged on two cards,
one 2WX3H and
the other 4WX3H. Most of the
basic functions are contained in the 4W card, which
is located at 01 A/A1F2. The interface to the coax
cable, the dot counter, and the video serializer are
located on
the card in 01A!A1G2.
1.1.1 Magnetic
Slot Reader
The magnetic slot reader (MSR) and
the magnetic
hand scanner
(MHS) accessories allow the 3278 to
enter data recorded on a magnetic stripe. They
attach
to the display station through a cable. The
magnetic slot reader reads information when a
magnetic striped card
is passed through a slot in the
reader. The magnetic hand scanner reads data when
it
is passed over a magnetic stripe. (The magnetic
SY27-2510-0
(1/81) 1-3

hand scanner is only supported on a 3278 attached
to a 3274 customized for the alphanumeric character
set.)
1.1.2 Selector Pen
The Selector Pen feature for the 3278 Display Station
is used to select a field or fields displayed on the
screen. The point of the pen contains a device
that
can detect the light of a character on the screen;
pressing the point
of the pen against the screen acti-
vates a switch in the point.
1.1.3
APl/Text
The APl/Text feature allows users to use APl or
Text applications at the 3278. A 3278 with APL!
Text installed can:
• Display the 2?2-character-plus-space APL!Text
character set.
• Be used to enter 94 EBCDIC characters and 81
APL-specific characters plus space on the APL
keyboard.
• Be used to enter 94 U.S. English characters and
65 Text-specific characters plus space on the
Text keyboard.
1.1.4 Electrical Grounding
The 3278 is electrically connected between ac and de
returns at
the unit. A ground wire is attached from
the upper chassis
to the gate and then to dc return at
card location 01A/A1H2P8.
The coax return (shield) is isolated from the dc return
at the 3278. With the ac power cord disconnected, a
correctly wired unit should indicate continuity
between ac and dc ground, and
an open circuit
between the customer coax shield and the 3278 dc
ground.
1-4 SY27-2510-6

Major frame static points exist around the CRT area
of the machine. Poor or no contact at these points
may cause
intermittent or erratic display operation
such as:
• No display (blank screen)
• Erratic raster on the lower or the upper half of
the screen
• A bright miniature raster in the center of the
screen
• The high-voltage power supply cycling on and off
• A single line on the top of the screen
If the initial MAP procedures do not isolate the erratic
display problem, check the following static ground
points before retrying
the MAPs.
• CRT harness (see Figure 4-5)
• Yoke shield and CRT connector (see Figure 5-1)
• Yoke/centering rings (see Figure 5-3)
• Contrast/intensity control (see Figure 4-5)
• Yoke grounding clips (see Figure 5-3)
The brightness-contrast assembly is grounded through
a spring clip located behind
the brightness assembly.
Verify this connection by removing the brightness
knob and checking for
continuity between the frame
and
the brightness potentiometer shaft. (See Figure
4-5.)
Failure to maintain good grounding connections at
all ground locations may cause erratic PQR reset
operation.
1.1.5 Equipment Lightning Protection
The 3278 is designed to provide a low-impedance
energy path from the external coax shield to frame
(ac) ground for potentials above
36 V. Additional
information on lightning protection for the customer
coax (customer responsibility) is provided in the
IBM 3270 Information DisplaySystem: Installation
Manual-Physical Planning, GA27-2787.
SY27-2510-6 (1/81) 1-5

1.2 Maintenance Plan
The maintenance plan for the 3278 uses the following:
• Operation tests
to sense failures, both for problem
determination and for verification.
• FRU swapping as an aid to failure isolation.
• Maintenance analysis procedures (MAPs)
to give
a planned procedure
to isolate and repair any
failure
on the 3278.
1.3 Operation Tests
Operation tests include offline and online tests.
• Offline tests (Test mode) - The 3278 offline tests
are activated by placing
the Normal/Test switch
in the Test position, taking the 3278 offline from
its control unit,
and putting it in Test mode.
• Online tests- The 3278 online tests are in the
control unit to which the 3278 is attached. Online
tests may be requested from any online display
station with a keyboard, and may be run on
any
specified online terminal attached to the same
control unit. The results
of the test are displayed
at the requesting display station. Online tests
include a routine
to display the error log for any
terminal attached
to the same control unit, and
for the control unit.
Operation tests are described in detail in Chapter 3.
1.4 FRU Swapping
The FRU swapping procedures are given in the MAPs
in Chapter 2; F RU locations and part numbers, in
Chapter 4.
1.5 MAPs
The MAPs are designed
to give a quick and effective
procedure for isolating and repairing
any problem on
the 3278. To use the MAPs effectively, you must
observe the following rules:
1·6
1. Before the 3278 MAPs are used, the customer
should have performed problem determination,
using the 3278 Problem Determination Guide
(PDG), located under the keyboard handrest.
SY27·2510-6

2 If a failure was sensed while the 3278 PDG was
being used,
the failing step number was record-
ed on a problem report form (GX23-0201,
or GXl8-1033 for Japanese English or
Katakana; see Figure 1-3). This step number
will be useful when the MAPs are being used.
3.
If the failure is intermittent, cards and cable
connectors should be checked for correct
seating, and voltages should be checked for
correct tolerances
as described in MAP 01.
Check
the tightness of the screws on the capa-
citors in the low-voltage power supply.
4. The 3278 should be online to its control unit
unless the MAP instructs you to place the
3278 offline. If the 3278 is offline (in Test
mode), some
of the symptoms may differ
from those for which the
MAPs were designed.
5. The
MAPs will instruct you to reseat/swap
cards
in a specific sequence. The first card is
the first probable cause of the failure, the next
card
is the next probable cause, etc.
6. Always
res eat the cards and their associated
cables, and test before swapping parts. Reseat
the cables, and check
the capacitor screws for
tightness before swapping the low-voltage
power supply.
7. When the analog card (card 01 A-H2) is swapped,
the new card may need adjustment.
8. Always reinstall the original
part when the
new part did
not repair the problem.
9. If you go through the MAP once without
repairing the problem, go back to the starting
point and go through the
MAP a second time.
If, after a second pass through the MAPs, the
trouble is not repaired, call for assistance.
10. The ECScard
01A/AlD02 (0) or O1A/A1E2
(M) may contain a pluggable APL/Text char-
acter generator ROS module. Static discharge
can damage
the ROS module if you do not
follow proper grounding procedures when
handling a loose module, that is, one not in-
stalled
in a card socket. Hand contact should
first be made to the foam or wrapping in which
SY27-2510-6
(1/81) 1-7

~~M 3276/3278 Problem Report Form
Unit Idernilieation
Unit Type 3276 3278 (circle one)
Una Seri~1 Number
Telephone Number
Dale and T,me
Reported by
1 Record the step number where you detected the failure
~
~ :
~ :;; Q
--
~--
$tepNumber
2Circle all 01 the followrng symbol, thaI are displayed in the Operato. Information Area of the falling display station(s):
Note: Ifnota BI ora iii! ,recordthesymbo'- Subsystem ReadY __ E!1 or iii! __
If one of these three wmbol. is displayed, insert
the 2· or 3~jgit code following the symbol
Host Conflecljon __ .!!. or 1.
(
Comm,",,,,",, P,o""m_ -"n-
Display Station Problem- I!I!
Program Error ___ PROG
3 If the display station is a 3278. go to slep 6: if the display statl<;Ml IS a 3276. continue
4Areallattachedtermrnal,falling?
If "NO" is Checked. identify ail the failing terminal,
DD
5 Write an "X" in each circle below for each light that wa, on when the error occurred
0 2
0
.s-
OK
0 (
S,wm
Machine
3276
Front
o-g
3276Conlrol
Check Check
Panel 0 0 0
~
6 If the keyboard is failing, fill in the appropriate section below. On the keyboard diagram below write an X in
theapproprjate location for each key that failed
DAlikevsfail.
DAllchlraeterkaysfail.
888888888888888E388888
8888888P8888888888888
88 BBBRPPRPR8888n BB BBB
BB BBBBPPDf=~BPBRBtd 88 888
Q::=Jt \HcO "." ... ~ .. '""
7After completing this form. follOW your organi~ation', procedure for reporting problems and ,ave thi, form for the
service representative.
_ .... OOmmenU cc,,",ce<"ing t~i. form to IBM Corporation,
DoINOr'tINnt63T, Ne;gnbDrhOOdRoed. King.ton. NBW York 12401
© Copvright Inlemattonal BUStnes, Machines CorPDrotkm 1978. 197 9
''''.'"'""n.' •••' ........ h .... CO,PO'",>OO
D.t. p,o< ... ",~ a,.";,,
'!33W .... " ... , ......... Wh".PI."'. " .• ,"' ..
,.M Wor'd ,,, ••• ,. .. "' •• ,, .... "CO'.O,.!lon
,_.O'''OOU',., ....., R,.,"9.N."hTa"._n.H' .. U'.A '05"
'SMWor'.''' ••• "o .. , .. , ...... '''.r,'''.c'' .... ,...
U.~.m"r.nA ... "•. W"".P' .. "'.N .•.. U.'.A.'OfOl
I'dn,ed;" the U.S.A. GX23.0201·2 3/79
Figure 1-3_ IBM 3276/3278 Problem Report Form
1·8 SY27-2510-6