Memorex 1377 Operation And Service Manual

REX

1377 Display Station

Operation and Service Manual

1377.20-01

Publication Number 1377.20-01

March 1976 edition

The information in this publication is subject

to

periodic revisions and

to

updates by Publications Bulletins. A bulletin is identified

as

Publication

Number

1377.20-01

XX,

where "XX" equals

"01"

for

the first bulletin

released. ' ,
To request copies

of

this publication

or

any bulletin, send a Supplies
Requisition (form number 7020) using the publication number to: Memorex
Corporation, Marketing Distribution Center, San Tomas at Central Ex­pressway, Santa Clara, California 95052.

A readers' comments form is provided at the back

of

this publication.

If

the
form has been removed, please send comments to Memorex Corporation,
Department 6940, MIS 14-07, San Tomas at Central Expressway, Santa
Clara, California 95052.

©1976

MEMOREX CORPORATION

PREFACE

This manual provides information about the operation

of

and service requirements

for

the Memorex 1377 Display Station. The Introduction, Section 1, lists the advantages

of

the 1377 Display Station over other cathode-ray tube display stations. A description

of

the 1377 display, keyboards, and optional selector

light

pen operation

is

provided in

Section

2.

Sections 3, 4, and 5 comprise installation procedures, maintenance instructions, and
programming notes, respectively.

Because the Memorex 1377 is designed to interface specifically with the IBM 3271,
3272,

or

3791

Control Unit, the reader should refer to the following IBM publications

for

system information:

• An Introduction

to

the IBM 3270 Information Display System, GA27-2739

• IBM 3270 Information Display System Component Description, GA27-2749

• Introduction

to

Programming the IBM 3270, GC27-6999

• A Guide to Using the Test Request Feature on IBM 3270 Information Display
Systems, GA27 -2774

• An Introduction to the IBM 3790 Communication System, GA27-2767

1377.20-01-3/76

iii

TABLE OF CONTENTS

Section

Page

1 INTRODUCTION

...................................................

1-1

2 OPERATOR'S

GUiDE

...............................................

2-1

2.1

1377 DISPLAY

...................................................

2-1

2.2 KEYBOARD OPERATION

.........................................

2-2

2.3 1377 SELECTOR

LIGHT

PEN

....................................

2-13

3 INSTALLATION

....................................................

3-1

3.1

SPECIFICATIONS

................................................

3-1

3.2 CABLE REQUIREMENTS

.........................................

3-3

3.3 PROCEDURE

....................................................

3-3

4 MAINTENANCE

....................................................

4-1

4.1

DISASSEMBLY/ASSEMBLY

.......................................

4-1

4.1.1

Monitor

Disassembly

...........................................

4-1

4.1.2 Keyboard Disassembly

..........................................

4-7

4.2 MONITOR

ALIGNMENT

.........................................

4-10

4.2.1

Voltage Levels

.................................................

4-11

4.2.2 Horizontal Size

................................................

4-13

4.2.3 Horizontal Frequency

.............................•............

4-14

4.2.4 Vertical Size

...................................................

4-15

4.2.5 Vertical Linearity

..............................................

4-16

4.2.6 Master Brightness

.............................................

4-17

4.2.7 Centering

.....................................................

4-18

4.2.8 Tilted Raster

..................................................

4-19

4.2.9 Focus

.........................................................

4-20

4.3 TROUBLESHOOTING

..............................

. . . . . . . . . . .

..

4-20

5 PROGRAMMING NOTES

...........................................

5-1

1377

.20-01-3/76

iv

SECTION

1

INTRODUCTION

The Memorex 1377 Display Station, shown in Figure

1-1

, consists

of a high-

performance cathode-ray tube (CRT), a

typewriter

or

operator

console keyboard, and

an

optional

selector

light

pen. These Display Stations are used in local

or

remote

clusters

to

display

alphanumeric

data, and to enter data

into

and retrieve data from

an

IBM System/360

or

System/370 . Figure 1-2 illustrates

compatible

system

con-

figu rations.

FIGURE

1-1. MEMOREX 1377 DISPLAY STATION

1377 .

20-01-3

/76

1-1

-"

I

N

S/360-370

MPLX
CHNL

SLTR
CHNL

BLK

MPLX

CHNL

S/370

BLK
MPLX
CHNL

1270

2701

2703

3704

j~

•

..

1270

AND

1360

ARE

MEMOREX CONTROL UNITS;

OTHERS SHOWN

ARE

IBM CONTROL UNITS.

HALF/FULL DUPLEX COMM

f---~B-I-SY-N-C-:-H-R-O-N-O-U~S----""-

LINE

f-

_______

Fc...;U:..:L:=L-.:D:..:U:..cP..=L.::cEX-'-

___

COMM

--~

SDLC LINE

3271-2*

3271-12'

3791··

·ONE TO

FOUR

DEVICES (STATIONS/PRINTERS)

MAYBE

ATTACHED TO A SINGLE CONTROL UNIT
WITHOUT FEATURES INSTALLED. WITH FEA­TURES, 5 TO

32

DEVICES MAY

BE

ATTACHED.

··ONE

TO

31

STATIONS MAY

BE

ATTACHED TO A

SINGLE

3791

CONTROL UNIT.

FIGURE 1-2, LOCAL AND REMOTE CLUSTERS OF 1377 DISPLAY STATIONS IN COMPATIBLE SYSTEM CONFIGURATIONS

The Memorex 1377

is

a plug-compatible replacement

for

the IBM 3277-2 Display

Station used in IBM 3270 Information Display Systems. Unique advantages

of

the 1377

are provided by the following

standard features.

• Upper/lower case graphics.

• Keyboard shift lock - Permits full secretarial shift.

• Audible Alarm

for

source

error

detection - Alerts the operator that a

keyboard entry was

not

accepted

or

that the screen

is

full. Additional

utilization

of

the Audible Alarm may be provided

by

the application program.

• Horizontal frequency

of

approximately 19 KHz - Provides quiet operation.

• Non-glare screen - Reduces eye strain.

• Refresh cycle

of

60 Hz - Eliminates eye fatigue caused by noticeable

blinking

of

the display.

• Reverse video

cursor

(dark

print

on

light

background when remainder

of

screen displays

light

print

on a dark background) - Indicates clearly where

the next character typed on the keyboard will appear on the screen.

• Additional line (line 25) - Indicates line and column numbers

of

cursor and
defines status (Le., SYSTEM AVAILABLE, INPUT INHIBITED, and INSERT
MODE).

• Keyboard Numeric Lock - Allows the programmer

to

set up fields that will

accept only numeric entries from the keyboard.

• Tiltable screen - Flexible position adjustment allows the screen

to

be tilted

for

maximum operator convenience

or

unusual operating environments.

• Fewer components resulting in reduced power consumption and increased
reliability.

1377

.20-01-3/76

1-3

2.1

1377 DISPLAY

SECTION 2

OPERATOR'S GUIDE

The

1377

display, shown in Figure 2-1, allows up to 1920 characters

to

be entered

and/or displayed

in

an

area

24

lines by

80

columns. An additional line is provided at

the bottom

of

the screen to display the cursor line and column number position$ and

machine status

as

illustrated

in

Figure 2-1.

The display may

be

unformatted

or

formatted, depending on the application program.

An unformatted display allows entering data in any line except the 25th line, which is

reserved for cursor location and status information. A formatted screen provides

display fields intended

for

certain types

of

information, such

as

customer name, date,

model number, etc.
The keyboard Numeric Lock feature prevents entering any type

of

data except
numeric data (numerals, minus sign, period, and DUP) into certain fields set up by the
application program. If the operator attempts to enter

an

alphabetic character into a
program-controlled numeric field, INPUT INHIBITED appears on the ·screen and the
Audible Alarm sounds from the the station. The computer may also indicate to the
operator erroneous data entry into other display fields, although the alarm and system
status may not indicate the error unless directed

to

do so by the program.

FIGURE 2-1. 1377 DISPLAY

1377

.20-01-3/76

2-1

Some

of

the fields on a formatted screen are protected

by

the program. Any attempt to
enter data in a field that is protected is inhibited. A protected field is generally the title
of

the information to be entered by the operator (Le., MODEL NO.). Data

mayor

may

not

be displayed, depending on the program. In a personnel history,

for

example,

SALARY display and/or modification would probably be inhibited to the operator.
Since the program knows what type

of

information to expect from the fields set up on

a formatted screen, it can process the data much more rapidly than

it

can process data

entered randomly on an unformatted screen.
The Power.

switc/1foroperation

of

the 1377 Display Station is located in

the

.Iower

lefthand corner

of

the display

as

shown in Figure 2-1. The switch is a push.,.pull switch

which provides power to the Display Station when pulled

out

and removes power

when pushed in.

In

addition, the operator can adjust the brightness

of

the display by

turning the switch clockwise

for

a brighter image

or

counterclockwise to dim the

image.
To accommodate a variety

of

viewing angles, the 1377 display may be adjusted to
individual preference. This adjustment is made by turning the knobs located on each
side

of

the display (reference Figure 2-1) in a counterclockwise motion to release the

display, adjusting the

screenas

desired, and turning the knobs in a clockwise motion

to tighten. them, thus securing the desired viewing angle.
As noted

in

the Introduction, the 1377 display has several advantages

for

the operator

that are provided

as

standard features

of

the Display Station. A non-glare screen and a

rapid refresh cycle

(60

Hz) eliminate eye fatigue caused by glare and blinking

of

the

display. Features are also provided

for

quick reference and early

error

detection

purposes. The reverse video cursor (light rectangular area

on

a dark background

as
shown in Figure 2-1) indicates clearly where the next character to be entered will
appear on the screen.

In

addition to this quick reference aid, the 25th line continuously

displays the cursor line number and column number and spells

out

the current status

information

for

the operator.

2.2

KEYBOARD

OPERATION

Two keyboards are available with the Memorex 1377 Display Station: a standard 78­key EBCDIC typewriter keyboard (Figure 2-2) and a 78-key EBCDIC operator console
keyboard (Figure 2-3). In addition, six local function keys

(F1

through

F6)

are available

for

future capabilities.

The unshaded keys in Figures 2-2 and 2-3 are those keys which have an automatic
repeat capability

as

long

as

they are pressed down (Le., the SPACE bar). All other keys

must be pressed down once

for

each . keystroke

..

·NOTE

Any character key can automatically repeat itself when the operator
simultaneously presses the SPACE bar and the character to be
repeated. A Space will occupy the first position on the screen,

but
the character will repeat from that point until the operator releases
the keys.

1377.20-01-3/76

FIGURE 2-2. TYPEWRITER KEYBOARD

FIGURE

2-3. OPERATOR CONSOLE KEYBOARD

A Security Key

lock

feature is provided as

an

optional feature

to

prevent unauthorized

operation

of

either keyboard. Although the cursor appears on the screen when this

feature

is

installed, the keyboard is inoperable unless the key is turned in the key lock

where it must remain

for

the duration

of

keyboard operation. The Security Key

lock

is

located on the righthand side

of

the keyboard.

The operation

of

the Audible Alarm feature has been expanded to include these

additional functions:

• Indicates that the operator has attempted

to

enter data while the system is in

the INPUT INHIBITED mode.

• Indicates that the operator has attempted to tag a non-selectable field using
the selector

light

pen.

• Indicates that the operator has attempted to enter non-numerical data into a
program defined numerical field.

Although the status INPUT INHIBITED appears on the screen when a keyboard entry
is

not

accepted, the sounding

of

the alarm alerts the operator to discontinue entry at

the exact

point

where

input

is inhibited should the operator fail

to

see the status

1377.20-01-3/76

2-3

indication appear on the screen. The Audible Alarm also indicates that the cursor is in
the last character position on the screen.

In

addition, the Audible Alarm may

be

sounded by

CPU

control per the application program.

A description

of

the control, alphanumeric, symbol, and special purpose keys

is

provided below for each type

of

keyboard. The location

of

each key

is

shown

as

it is

discussed. When keys are different

or

are in different locations on the two keyboards,

illustrations

of

both keyboards are provided

so

that the differences may be compared

easily. When the keys are identical on the two keyboards, only the typewriter keyboard

is

shown.

SHIFT

fLOCK

Keys

The SHIFT and LOCK keys are identical

in

function

to

those

of

a standard typewriter.

When the SHIFT key

is

pressed

in

conjunction with a character key, the character

shown on the upper half

of

the key is displayed. When the

k~yboard

is

shifted in
conjunction with a dual-function control key, the function indicated on the upper half
of

that key

is

performed

(Le.,

DUP). Pressing

,a

key without the SHIFTfLOCK,.key

executes the character

or

function shown on the lower half

of

the key.

Pressing the LOCK key locks the keyboard in the shifted position until released by
pressing either SHIFT key.

The

1377

keyboards provide a

fuU

secretarial shift. That is, when the LOCK key is
pressed, the LOCK key remains down until released by pressing eitoer SHIFT key.
This provides the operator with a clear indication that the LOCK key

is

in the pOSition

desired before data

is

typed.

An advantage provided

as

a standard feature

of

the

1377

keyboard is the upperllower

case graphics display. When the, SHIFT/LOCK keys are in

an

unshifted positton,

lower-case alphabetic characters are displayed on the screen; when shifted, upper-

case letters are displayed.

1377

.20-01-3/76

2-4

SPACE Bar

The keyboard SPACE bar

is

interpreted by the 1377

as

any other character entry.
When the SPACE bar is pressed, a space character replaces any character that
appears in the position indicated by the cursor on the display. Therefore, caution
should be taken

not

to use the SPACE bar to reposition the cursor.

The SPACE bar has

an

automatic repeat capability.

CURSOR

CONTROL

Keys

•••• : .j

.••••

:.:

::

::.

:.

The cursor indicates to the operator where the next character entered will appear on
the screen. Eight keys allow the operator to move the cursor

quickly

from one position

to another.

As

noted in the individual key descriptions below; some

of

the CURSOR
CONTROL keys move the cursor one character location at a time, while others move
the cursor from one position on the screen

to

a position on a new line

or

at the

beginning

of

a new field. The CURSOR CONTROL keys have automatic repeat

capability with the exception

of

the

backtabkey.

A brief description

of

each CURSOR

CONTROL key function follows, with illustrations presented

as

required.

1377

.20-01-3/76

2-5

NEW LINE

Key-

Moves the cursor

to

the first unprotected character position on the next line

containing

an

unprotected data field.

If

no unprotected field exists, the cursor returns

to line 1, column 1

of

the screen.

TAB

Key-

(3

Moves the cursor to the beginning

of

the next unprotected data field. If the display is

unformatted, the cursor moves

to

line

1,

column

~.

BACKT

AB

Key-

8

Moves the cursor back to the first unprotected character position in the field in which

the cursor

is

located; if the entire field is protected

or

if

the cursor is located at the

beginning

of

the field, the cursor moves back

to

the first character location in the

preceding unprotected input field.

HORIZONTAL

and VERTICAL POSITIONING

Keys-

OJ

CD

88

Moves the cursor one character position

ata

time in the direction indicated by the

arrow. When located in the last character position in a line

or

column, the

c;:ursor

moves to the opposite side

of

the screen

(Wraps

around) if a positioning key

is

pressed.

In

the case

of

the horizontal keys, the cursor wraps around and appears on

the righthand side

of

the line above

if

the arrow pointing to the left is pressed; the

cursor wraps around and appears on the lefthand side

of

the line below if the key

showing the arrow pOinting to the right is pressed. When either vertical key

is

pressed,

the cursor moves

off

the screen and reappears on the opposite end

of

the screen in the

same column location.

BACKSPACE

Key-

C.

)

Moves the cursor one character position

ata

time to the left; operates the same

as

the

left horizontal positioning key described above.

1377.20-01-3/76

2-6

ALPHABETIC

Keys

The ALPHABETIC keys on the 1377 are identical

to

those

of

a standard typewriter.

Although

only

the upper-case letters appear on the keyboard, lower-case letters

appear on the screen when the letters are typed and the SHIFT/LOCK keys are

not

pressed. The SHIFT/LOCK keys must be pressed in conjunction with

an

ALPHABETIC

key to enter

an

upper-case alphabetic character.

NUMERIC

Keys

Numbers are entered and displayed on the screen by pressing the NUMERIC keys
while the keyboard is in the unshifted position.

1377

.20-01-3/76

2-7

PUNCTUATION MARK and SYMBOL

Keys

Typewriter Keyboard

Operator Console Keyboard

PUNCTUATION MARKS and SYMBOLS are entered and displayed by pressing the
appropriate key while the keyboard is in either the shifted (for characters appearing on
the upper portion

of

the keys)

or

the unshifted (for characters appearing on the lower

portion

of

the keys) position.

SYMBOLS and PUNCTUATION MARKS may be located

indifferent

keyboard

positions

and,in

some cases, may be entirely different on the two types

of

1377

keyboards. The names

of

the PUNCTUATION MARKS and SYMBOLS shown in the

illustrations above are

as

follows:

1377

.20-01-3/76

2-8

UPPER

HALF

OF

NUMERIC

KEYS

TYPEWRITER KEYBOARD

OPERATOR CONSOLE

KEYBOARD

Key

Name

Key Name

I

Logical OR, Vertical Bar

=

Equals Sign

@

At

Sign

<

Less Than Sign

#

Number

Sign

Semicolon

$

Dollar

Sign

Colon

%

Percent Sign

%

Percent Sign

¢

Cent Sign

Apostrophe

&

Ampersand

>

Greater Than Sign

*

Asterisk

*

Asterisk

Left Parenthesis

Left Parenthesis

Right Parenthesis

Right Parenthesis

UPPER/LOWER

PUNCTUATION

MARK

AND

SYMBOL KEYS

TYPEWRITER KEYBOARD

OPERATOR CONSOLE

KEYBOARD

Key

Name Key Name

Underscore

t

Automatic

Underscore }

Automatic

M'

S' , Repeat

' , Repeat

mus Ign

J Capability

Minus Sign

Capability

+

Plus Sign

+

Plus Sign

Equals Sign

&

Ampersand

! Exclamation

Point

¢

Cent Sign

-,

Logical

NOT

Sign @

At

Sign

Colon

! Exclamation

Point

Semicolon

$

Dollar Sign

Quotation

Mark

..

Quotation Mark

Apostrophe

#

Number

Sign

<

Less Than Sign

Logical OR, Vertical Bar

Comma

Comma

>

Greater Than Sign

-,

Logical

NOT

Sign

Period

Period

?

Question Mark ?

Question Mark

/

Slash / Slash

1377

,20-01-3/76

2-9

CLEAR,

ERASE

INPUT,ERASE EOF, TEST

REQ,

and

RESET Key.

The CLEAR key

er~ses

the entire screen and returns it to an unformatted state. When

the CLEAR key is pressed, INPUT INHIBITED appears in the status area on the 25th

line

of

the display. Keyboard entry is then inhibited until released by the program

or

by

pressing the RESET key.

The ERASE INPUT key erases all unprotected fields on

the

screen and moves the

cursor .to the

first

pOSition where data may be entered. If the entire display is

unformatted, the cursor moves to line 1, column 1

of

the screen.

The ERASE EOF (End

of

Field) key erases all characters from the cursor position to

the end

of

the unprotected field in which

it

is located. The cursor does

not

move when

this key is pressed.

the

primary function

of

this key is to correct erroneous data

entered by tabbing to the beginning

of

the data field, erasing data entered in that field

by

preSSing ERASE EOF, and typing in the correct data.

The TEST REO key signals the computer that a test message is on the screen and
causes INPUT INHIBITED to display on the screen'. Data entry is then inhibited until

released

by

the program

or

by preSSing the RESET key. After TEST REO has been
pressed, the computer should provide further instructions. For details regarding the
use

of

this key, the reader should refer to the IBM manual A Guide to Using the Test

~equest

Feature on IBM 3270 Information Display Systems, GA27-2774.

The RESET key resets the INSERT MODE and INPUT INHIBITED status indications,

unless data is being transferred to

or

from the system. When these indications are

not

reset because

of

data being transferred, the RESET key must be pressed again after

data transfer has

been.

completed.

1377

.20-01-3/76

2-10

DUP/PA1 and FIELD MARK/PA2

Keys

(Typewriter Keyboard)

PA1

and CNCL

Keys

(Operator Console Keyboard)

Typewriter Keyboard

Operator Console Keyboard

The

PA1

(for both keyboards) and PA2 (typewriter keyboard only) keys provide

Program Access from the keyboard. The function

of

these keys

is

determined by the

program being executed at the time one

of

the keys is pressed. After a

PA

key is

pressed, INPUT INHIBITED is displayed on the screen until reset by the program

or

by

preSSing the RESET key.

The DUP key is unique to Display Stations having a typewriter keyboard.

To

use this

key, the keyboard must be in the shifted position. When pressed, the DUP key enters a

backward slash

(\)

in the cursor position on the display and moves the cursor to the

beginning

of

the next unprotected data field. The DUP key signals the program that a

duplication function

is

necessary. The program, however, determines the exact

interpretation

of

this function.

The FIELD MARK key, also unique to typewriter keyboards, causes

an

arrow

(-)

to

be
displayed in the cursor position on the display. This code is normally used when the
display is unformatted to indicate

to

the program that the end

of

a field has been

reached.

The CNCL (Cancel) key normally signals the

computer

to erase all data entered in

unprotected fields and moves the

cursor

to the beginning

of

the first unprotected data

field on the screen. The program determines the exact function

of

this key.

1377

.20-0

1-3/76

2-11

INS MODE and

DEL

Keys

The INSERT MODE key allows the operator to enter

or

correct data in

an

unprotected
field without changing the data following the insertion. When this key is pressed, the
Display Station enters the Insert Mode. Keyboard operation is

not

inhibited unless the

cursor is positioned in a protected field. Once the

cursor

has been moved

to

the

location where

an

insertion is necessary, any key

entry

moves the character in the

cursor location one space to the

right

and enters the new character in its place. Each

character is inserted into the location originally occupied by the cursor, shifting the

remaining letters to the right one character position.

If

necessary, and

if

the field is

long enough, the characters may move

to

the line below to complete the insertion. The

Audible Alarm sounds and the INPUT INHIBITED status appears

if

character insertion

attempts to exceed the length

of

the field.

The keyboard

is

taken

out

of

the Insert Mode

by

pressing the RESET key.

The DEL key allows the operator

to

delete data entered in the keyboard and displayed

on the screen. This is accomplished

by

moving the

cursor

over the character

to

be
deleted and pressing the DEL key. The character is removed and all characters
following to the end

of

the field shift one character position

to

the left, thereby filling in

the space left by the deleted character. The DEL key must be pressed once

for

each

character deletion.

ENTER

Key

The ENTER key signals the

computer

that keyboard

entry

is complete and ready

for
transfer into the computer. When pressed, INPUT INHIBITED appears in the status
area

of

the display and

input

is inhibited until released

by

the program

or

by pressing

the RESET key.

1377 .20-0

1-3/76

2-12

PF1

Through

PF12

Keys

The function performed

by

pressing a

PF

(Program Function) key is determined by the

application program being executed

at

the time the key is pressed. Under one

program, pressing

PF1

may Signal the

computer

to

send,a

specified form

to

the

display. The function

of

PF1

may be entirely

different

under

another

appli~ation

program.

2.3 1377 SELECTOR

LIGHT

PEN

A selector

light

pen is available

as

an optional feature

of

the 1377 Display Station.

When used, the pen selects certain fields displayed on

the

screen. The addresses

of

these fields are then sent

to

the

computer

to

be used as defined in the program.

A

light

pen field is denoted

by

a designator character located at the beginning

of

the

field. These designators may be either a Greater Than Sign

(»,

a Question Mark (?),

or

a

null

or

space character. Whenever a light-pen-detectable field showing a designator
character is selected (tagged), the designator displayed changes (Le., a Question Mark
becomes a Greater Than Sign and vice versa).

This

indicates to the

operator

that the

field has been tagged. Selectable fields without a Greater Than Sign

or

a Question

Mark designator are attention ·fields and function like the ENTER key when selected.
To use the selector light pen, the operator presses the

tip

of

the pen against the screen
at a location within the field to be tagged (Figure 2-4). The eh3ctronic eye inside the
pen reacts to the presence

of

light

on the screen

by

changing the designator.

In operating the selector

light

pen, care should be taken to

make

sure

thatthe

tip

of

the pen is placed perpendicular

to

the screen.

Slight

tipping

of

the

point

may cause

the field above

or

below the desired selection

to

be tagged.

If

this should happen, the

operator

simply

presses the pen against the tagged field

to

deselect

it

and proceeds

to

reselect the proper field.
After all correct fields have been tagged, the field addresses are sent to the

computer

by

pressing the light pen against a selectable field designated by a space

or

a null on

the screen. These selectable fields are usually identified

by

the messages they spell

out

(i.e., ORDER COMPLETE).

1377.20-01-3/76

2-13

~-

'-"'-.

-.

----.

.

-

---

..

-

FIGURE 2-4. SELECTOR LIGHT PEN OPERATION

1377.

20-01_3

/76

2-14

3.1

SPECIFICATIONS

Dimensions

Weight

Operating Clearances

Top

Bottom
Sides
Front

Rear

Airflow
Power Requirements

kVA
Phases
Power Cord Length

Environment. Operating

Temperature
Relative Humidity
Maximum Wet Bulb

Environment. Nonoperating

Temperature

Relative Humidity
Maximum Wet Bulb

SECTION 3

INSTALLATION

Refer

to

Figure

3-1

*

22

kg (49 Ib). including keyboard

15 cm

(6

in.)

No requirement

8 cm

(3

in.)

o cm (0 in.)

3 cm

(1

in.)

Convection only

0.085
Single

2.43

m

(8

ft)

10%

to

90%

100 to 490 C (500 to

1200 F)

10%

to

90%

27°C

(80

0

F)

*The 1377 is designed

for

tabletop use. Recommended table height is 66 cm (26 in.).

The keyboard can be physically located up

to

60.9 cm (24 in.) from the

front

of

the

display stand.

1377.20-01-3/76

3-1

50.8 em

(20

in.)

I I

D

0

I

30.5 em

~I

~

-«

______

(12 in.)

~

(39--r-.8~5em_in.)

_

tT"t:;;;:·

=:=:;;;;;:r:)

t

2.5 em Nom. 60.9 em Max.
(1

in. Nom. 24 in. Max.)

~

;=

TOP

VIEW

,

..

SIDE

VIEW

L J

""

~

I I

39.7 em

(15.625 in.)

I

..

30.5

em

(12 in.)

FIGURE 3-1. DIMENSIONS OF 1377 DISPLAY STATION

1377

.20-01-3/76

3-2

50.8 em
(20

in.)

46.4 em

(18.25

in.)

3.2 CABLE REQUIREMENTS

The customer is responsible for the interconnect cable between the Display Station
and the Control Unit. Cable length may not exceed 609 m

(2000

ft):

Cable Type:

Coax Commercial Type RG-62 A/U

Connector Type:

Commercial Type BNC UG-260 B/U

3.3 PROCEDURE

COAXIAL
CABLE

1.

Remove DIsplay Station from packaging per instructions provided on the
container.

2.

Connect display to keyboard by attaching keyboard cable to back panel

of

display

as

illustrated in Figure 3-2.

3.

Interconnect AC cord between connector at back

of

display

(see

Figure 3-2)

and wall outlet.

KEYBOARDI
DISPLAY
INTERFACE
CABLE

FUSE
(1

AMP)

FIGURE 3-2. CABLE CONNECTIONS

AC
CABLE

1377

.20-01-3/76

3-3

4. Offline Check
a. Pull power switch

out

to apply power to Display Station. Assure that

Audible Alarm sounds and that cursor, line number, and column

number

appear on the screen (within 30 seconds) before proceeding. (If an error

or

malfunction occurs

at

this point,

follow

applicable steps in customer

troubleshooting flowchart, Figure

4~11.)

If

INPUT INHIBITED appears,

press RESET key.

b. Enter several random characters from the keyboard to verify accuracy in

character display.

c. Test function

of

CURSOR CONTROL keys.

d. Test INSERT MODE

by

pressing key. INSERT MODE should appear on

25th line

of

screen. Move the cursor to a location in the center

of

data

displayed on the screen. Insert two

or

three characters to assure that

INSERT MODE is functioning properly. Press Reset key.

, .

e. Test DEL key by moving cursor

to

location in the center

of

data displayed

on the screen and pressing DEL two

or

three times to assure that

characters are properly deleted from display.

f. Test ERASE EOF key

by

moving cursor to a location in the center

of

data

displayed on the screen and presSing the ERASE EOF key.

All

data from

the

cursor location to. the last character tYped on the screen should

disappear.

. '

g. Test ERASE INPUT

by

pressing key

andassu

ring

that

aU

data dIsplayed on

, the screen

is

erased.'

. , ,

, . . . .

h.Testthe

CLEAR

key

by'

entering

damon

the. screen and then pressing

'CLEAR

to" assure that the screen is cleared. INPUT INHIBITED should

appear . Press ' Reset key. .

Ifan

error should

occur

or

the Display Station should malfunction during

Offline

Check

(steps·b, through

h.);

n~tifY

Memorexservice, Otherwise,

proceed

to

Step

5.

5.

Connect coaxial cable from the Control

Unit

to the Display Station

as

shown

in Figure

3~2.

Identify Display Station Coaxial Cable by tagging it at the

Control Unit connector and at the Display Station.

6. Online Check
If

customer programs include IBM Online Tests (OL Ts)

or

Requests

for

Tests

(RFTs), these programs may be run to check the online functioning

of

the

Display Station.

If

these programs are unavailable, the customer application

program should be run

for

online testing. Should an error

or

malfunction

occur

during the test program, the customer should follow the

troubleshooting guidelines set' forth in Section

4.

1377

.20-01-3n6

3~

SECTION 4

MAINTENANCE

This section describes the procedures to

be

taken for disassembly and assembly

of

the

1377 Display Station, the various procedures for monitor alignment, and the customer

and Memorex field service troubleshooting procedures. Disassembly/assembly
procedures are provided first since these procedures may

be

required for either

monitor alignment

or

troubleshooting.

4.1

DISASSEMBLY/ASSEMBLY

The following disassembly procedures cover the two major components

of

the 1377
Display Station: the monitor and the keyboard. To assemble the 1377, reverse the
procedures specified in paragraphs

4.1.1 and 4.1.2.

4.1.1

Monitor Disassembly

1.

Disconnect the external AC, coaxial, and keyboard/monitor interface cables
from the back

of

the monitor (Figure 4-1).

2.

Remove

the external fuse shown in Figure 4-1.

3.

Loosen the top cover screw (Figure 4-1).

COAXIAL
CABLE

MOUNTING
PLATE
SCREW

KEYBOARD/ FUSE
MONITOR

(1

AMP)
INTERFACE
CABLE

TOP AC
COVER CABLE
SCREW

FIGURE 4-1. MONITOR CONNECTOR PANEL

1377.20-01-3flS

4-1

MOUNTING
PLATE
SCREW

MONI T

OR

/ TOPCOVER

KEYBOARD
ASM

FIGURE 4-2. DISPLAY STATION MAJOR ASSEMBLIES

4. Remove the top cover

of

the

monitor

(Figure 4-2).

MONITOR
AD

JU

STMENT

KNOBS

5. Loosen the

monitor

adjustment knobs until the housing rocks back and forth

freely . (Figure 4-2)

CAUTION

Do

not

remove the adjustment knobs .

6. Position the

monitor

and moni

tor

stand as shown in Figure 4-3.

7. Remove the adjustment knobs.

8. Remove the stand

from

the moni

tor

.

1377.20-01- 3/76

4-2

FIGURE 4-3. ADJUSTMENT KNOB AND STAND REMOVAL POSITION

1377

.20-01-3/76

4-3

MONITOR
CHASSIS
MOUNTING

SCREWS

FIGURE 4-4. MONITOR HOUSING (BOTTOM VIEW)

9.

Tilt

the

monitor

so that the screen is facing

down.

10. Using a

%"

hex driver, remove the

four

monitor

chassis

mounting

screws

located on the

bottom

of

the

monitor

housing (Figure 4-4).

11

..

Remove the

connector

cable mounting plate screws (Figure 4-1).

12.

Tilt

the

monitor

upright.

13. Disconnect the power/brightness plug (Figure 4-5).

14. Disconnect the coaxial wire

connector

(Figure 4-5).

15. Assure that the

connector

plate is loose (Figure 4-5).

1377.20-01-3/76

4-4

POWERI
BRIGHTNESS
PLUG

COAXIAL
WIRE
CONNECTOR

CONNECTOR

PLATE

FIGURE 4-5. INTERNAL CABLE CONNECTIONS (MONITOR)

16. Facing the back

of

the monitor, lift the

monitor

chassis

out

of

the housing by

slightly rotating the chassis toward the rear and sliding

it

out

of

the housing.

17. Using a

3/

16

"

hex driver, remove the internal keyboard/monitor interface cable
connector from the connector plate by removing the two screws located on
either side

of

the connector (Figure 4-6). This step completes monitor

disassembly.

1377

.20-01-3/76

4-5

HARDWARE

1377

.20-01-3fla

INTERNAL
KEYBOARD/
MONITOR
INTERFACE
CABLE

FIGURE 4-6. CONNECTOR

PLATE

4-6

4.1.2 Keyboard Disassembly

1.

Tilt

the keyboard

as

shown in Figure 4-7.

2.

Remove the six keyboard housing cover mounting screws located on the

bottom

of

the keyboard (Figure 4-7).

3.

Set the keyboard in

an

upright position.

4.

Remove the keyboard housing cover.

1377

.20-01-3/76

KEYBOARD
HOUSING COVER
MOUNTING SCREWS

FIGURE 4·7. KEYBOARD (BOTTOM VIEW)

4-7

5. Disconnect the

logic

PCB/keyboard PCB interface cable (two places). the

Audible Alarm cable, and the internal

monitor/keyboard

interface cable

(Figure 4-8).

6. Using a

%"

hex driver, remove the keyboard/PCB assembly from the

keyboard brackets by removing the

four

mounting

screws (Figure 4-8).

7.

Remove the logic PCB

by

taking

out

the five screws and five kep nuts shown

in Figure 4-9 . This step completes keyboard disassembly .

1377 .

20-01-3/76

LOGIC

PCB/
KEYBOARD PCB
INTERFACE CABLE

MOUNTING
SCREWS

AUDIBLE
ALARM
CABLE

KEYBOARD/PCB

INTERNAL

MONITOR/KEYBOARD

INTERFACE CABLE

FIGURE 4-8. CABLE DISCONNECT AND PCB REMOVAL.

4-8

1377 .20-01 - 3/76

LOGIC PCB
MOUNTING

SCREWS

FIGURE 4-9. REMOVAL OF LOGIC PCB

4-9

4.2 MONITOR ALIGNMENT

Monitor alignment may

be

required in the maintenance

of

the

1377

Display Station.

Most

of

the adjustments are made with a special tool that

is

provided with each

Display Station.

The various monitor alignments, with accompanying illustrations, are covered in the

following paragraphs. When performing

an

alignment procedure, observe the warning

affixed to the monitor chassis. Areas

of

high voltage are shown in Figure 4-10.

FIGURE 4-10. HIGH VOLTAGE AREAS

1377

.20-01-3176

4-10

4.2.1

Voltage Levels

Potentionmeter locations for +12.

-12.

and +5 VDC adjustments are shown below.

Measure these voltages on

P2

of

the logic

PCB

with respect to

Pin

S (ground).

POWER

SUPPLY PCB

VERSION 1

POWER

SUPPLY PCB

VERSION 2

, +12 VDC

ADJUST TO
+12.00

±

.05

L

MONITOR CHASSIS

TOP VIEW

•

•

-12

VDC

ADJUST TO

-12.00

±

.05

I

+5 VDC

ADJUST TO

+5.00

± .05

I

rn

L:I

~~~~~t?~~G~

rt

~~~G~G~G~~-~

'"

....

1 2

345

6 7

8 9 10

11

12

13 14

15

0

LOGIC PCB

1

T

1377

.20-01-3nS

4-11

Measure +73 VDC at Pin 1

of

the monitor PCB with respect to the chassis.

+73

VDC

ADJUST TO

73.00 ±

.5

.1377

.20-01-3/76

MONITOR PCB

4-12

4.2.2 Horizontal Size

Adjust the horizontal size by turning the knob located on the back

of

the monitor. An

illustration

of

how this adjustment affects the monitor image is shown below.

1377

.20-01-3/76

MONITOR

(REAR VIEW)

4-13

I I

I I MAXIMUM ADJUSTMENT

I I

I I

I I

I I

MINIMUM ADJUSTMIONT

4.2.3 Horizontal Frequency

To center data within the

monitor

raster, adjust the horizontal frequency potentiometer
located on the monitor PCB. The illustrations depict the ideal adjustment, along with
two photographs showing

how

the monitor may appear before the adjustment is made.

IDEAL

HORIZONTAL

FREQUENCY

MONITOR

PCB

PARTIAL

AND

TOTAL

MISADJUSTMENT

1377.20-01-3/76

4-14

4.2.4

Vertical

Size

The vertical size adjustment potentionmeter is located on the monitor PCB.

Illustrations

of

minimum and maximum adjustment are shown below.

MONITOR

PCB

MIN.IMUM ADJUSTMENT

MAXIMUM ADJUSTMENT

1377

.20-01-3/76

4-15

4.2.5 Vertical Linearity

To provide equal spacing between lines,

of

data, adjust the vertical linearity

potentiometer located on the monitor PCB.

An

illustration shows a misaligned monitor

requiring this type

of

adjustment.

MONITOR

PCB

UNEVEN SPACING BETWEEN LINES

1377

.20-01-3/76

4-16

4.2.6 Master Brightness

The raster should be barely visible when the Contrast Control (ON/OFF pushbutton) is
turned to its brightest intensity. Set this maximum brightness by adjusting the master

brightness potentiometer located on the monitor PCB.

MONITOR PCB

CONTRAST CONTROL

(ON/OFF

PUSHBUnON)

FRONT VIEW

(MONITOR)

1377

.20-01-3/76

4-17

RASTER

·1

4.2.7 Centering

To center the image on the monitor, manually adjust the centering rings located on the
monitor

yoke. An off-center image is illustrated below. .

1377

.20-01-3/76

4-18

CENTERING

RINGS

4.2.8 Tilted Raster

II

the image on the monitor is rotated. adjUst the yoke

bY

loosening

thO

screw on the

right side

01

the yoke. adjusting the image. and securing the screws. Image rotation is

i\lustrated below.

4-19

1377.20-01-3/76

yOKE

SCREW

4.2.9

Focus

To focus the image on the monitor, adjust the potentiometer shown below.

4.3 TROUBLESHOOTING

Figures 4

...

11

and 4-12 illustrate the steps to be taken. by the customer a'ndMemorex
field se.rvice, respectively, should a malfunction occur during Display Station
operation. Whenever the monitor housing must beremoved·t6 comply withpTocedure,
make certain to observe the warning

noti~affixed

to

inside

ot

chassis. For high-

voltage locations, refer to' the illustration p'resented

in

Figure

4-10.

1377

.20-01-3nS

4-20

.....

w

-..j

-..j

N

o

I

o

.....

YES

STATIONS

{

OTHER

/'

HAVE SAME

YES

USE PEN WITH
INCREASED
INTENSITY.

ADVISE
OPERATORS
TO USE
INCREASED
INTENSITY.

YES

PROBLEM

ADVISE
MEMOREX
THAT PROB­LEM

IS

DUE
TO A PARITY
ERROR.

NO

LINE AND

COLUMN

DISPLAYED

WITHOUT

CORRES­PONDING
NUMBERS

/

"

[

RETRIED

WITH ORIG.

/ CABLING

REPLACE BAD
COAX CABLE.

RETURN TO

OPERATIONAL

USE

SWAP COAX
CABLES BE­TWEEN SUS­PECT STA­TION AND A
SECOND
STATION.

POWER UP
SUSPECT
STATION

AND

RETRY
FAILING
OPERATION.

ROTATE
INTENSITY
CONTROL
TO FULL
CLOCK­WISE POSI­TION.

CHECK
EXTERNAL

FUSE AND

REPLACE

IF BLOWN.
POWER UP
AND RETRY

FAILING
OPERATION.

r-~~~

PROBLEM

"{

SAME

PERSISTS

FIGURE 4-11. CUSTOMER TROUBLESHOOTING

YES

YES

--..

1

.....

(.)

....,

....,

N

o

6

.....

{

CUST.

.

TROUBLE-

SHOOTING

/ DONE

{(PROBLEM

IN STATION;

EXT.

FUSE

OK.)

/

/

PERFORM
"CUSTOMER
TROUBLE­SHOOTING"
PROCEDURE
(SEE

FIG. 4-10).

,

YES

YES

REPLACE

PEN.

'lPROBLEM

IN

STATION

SAME}

PROBLEM - - - - ­PERSISTS NO

{

BRANCH DETERMINED

BY

-

RESUL

TS

OF

CUSTOMER

TROUBLESHOOTING.

MEASUREMENT

MOVE
JUMPER
CONNECTION
ON LOGIC
PCB TO
OTHER
POSITION.
(SEE

FIG. 4-13)

LOCATION

PCB
LOGIC
LOGIC

LOGIC
MON.

YES

NO

ALL

FUSES

OK.
PROBLEM NOT
CORRECTED.

PIN

5

4
3
1

NO

NO

EXCHANGE
MONITOR/
KEYBOARD
INTERFACE
CABLE
WITH
ANOTHER
MONITOR

MONITOR DC VOLTAGE

SPECIFICATIONS

MIN.

NOM.

+

4.95

+ 5

-12.05

-12

+11.95

+12

+72.5

+73

CHECK INTER­NAL

FUSES
AND REPLACE
IF

BLOWN.

(SEE

FIG. 4-14)

MAX.

+

5.05

-11.95
+12.05

+73.5

f-

REMOVE
SPARE

MON-

ITOR

CHECK
DC VOLTAGES
AGAINST

SPE-

VOLTAGE!}

CIFICATIONS.

ADJUSTED

"-

"-

NO

NO

REPLACE
MONITOR

FIGURE 4-12. STATION FAULT ISOLATION AND REPAIR

PJ:lOCEDURE

U

HE WORD "EXCHANGE"

REFERS

_ TO JUMPERING A SPARE COMPONENT,

NOT

AN

ACTUAL COMPONENT REPLACEMENT.

NO

EXCHANGE
LOGIC/
KEYBOARD
INTERFACE
CABLE
WITH A

SPARE
KEYBOARD.
(SEE

FIG. 4-15)

REPLACE
KEYBOARD

REMOVE SPARE
KEYBOARD.
EXCHANGE
LOGIC/
KEYBOARD
INTERFACE
CABLE
WITH A
SPARE
LOGIC PCB.

(SEE

FIG. 4-15)

REPLACE
LOGIC
BOARD.

REMOVE
SPARE
LOGIC

PCB.
REPLACE
STATION.

FIGURE 4-13. LOGIC PCB JUMPER POSITIONING

1377.20-01-3/76

4-23

INTERNAL

FUSES

(0.8 AMP)

1377

.20-01-3fiS

FIGURE 4-14. INTERNAL FUSES

4-24

FIGURE 4-15. EXCHANGE OF LOGIC/KEYBOARD INTERFACE CABLE

1377

.20-01-3/76

4-25

Bits

SECTION 5

PROGRAMMING NOTES

The 1377 Display Station

is

plug and program compatible with the IBM 3270

Information Display System. Therefore, the reader should refer to the IBM manuals

listed in Section 1

for

programming

details. The few enhancements

of

the Memorex

1377 are pointed

out

in this section.

Table

5-1 presents the

EBCDIC

Input/Output

Interface Code used

by

the Control

Unit

and the Display Station.

The

characters that appear in bold typeface indicate those

codes which are

not

identified

for

the 3277-2

but

which have been specified

for

the

1377 Display Station. As shown, however, several codes remain unidentified.

If

an
undefined code is transmitted, a random character may appear on the screen. Since
the character is unspecified,

another

device may display a different character.

The

control

characters displayed

for

NL, EM, DUP, and FM are n,

r,

\ , and

-,

respectively.
The

1377 displays

upper

and lower case letters. Although the IBM 3277-2 displays

only

upper

case letters, both

upper

and lower case letters are transmitted. Therefore,

no

software changes are required when using a Memorex 1377.

TABLE 5-1. EBCDIC

INPUT/OUTPUT

INTERFACE CODE

00

01

10

Hex

00

01

10

11

00

01

10

11

00

01

10

11

00

11

01

10

11

Bits

-0,1

-2,3

1

4567

+

0 1

2 3

4

5 6

7

8 9

A

B

e

0 E F

-Hex

0

0000 0

NUL

OLE

SP

&

-

SP

OC>

"-

0

0

"-

0001

1

SOH

SSA

/

a

j

1:

1

A

J

1

0010

2

STX

EUA

SYN

b

k

s

2

B

K

S

2

0011

3

ETX

Ie

c

1

t

3

e

L T

3

0100 4

EM

d m

u

4

0

M

U

4

0101

5

PT

NL

e

n v

5

E

N

V 5

0110

6

ETS

f 0 W

8 F

0 W 6

0111

7

ESC

EOT

9

P

x

7

G

P X 7

1000 8

h

q

Y

8 H

Q

Y 8

1001

9

EM

i r

z

I

I

R

Z 9

1010 A

¢

!

I

I

#J.

7r

So

TM

1011

S

$

#

f

[ >

rnJ

1100

e

OUP

RA

<

.

% @

•

\

+

~

1101

0

SF

ENQ

NAK

(

)

-

}

J

- •

1110 E

FM

+

>

_.

l

-

±

-

1111

F

ITS

SUB

I

-,

?

" 1

-

X

/\

1377

.20-01-3/76

5-1

COMMENTS FORM

1377 DISPLAY STATION OPERATION

AND

SERVICE MANUAL-1377.20-01

Please send us your comments; they

wi"

help us produce better publications.

Whenever possible, please use specific page and paragraph references.

• Is

the.

material:

Easy

to understand?

Conveniently organized?

.......

'.'

....................

.
Complete?
We"

illustrated?
Accurate?
Suitable for its intended audience?

Ve.

Cl
Cl

[J
[J

Cl

[J

No

Cl

Q

[J
[J
[J
[J

•

For

what

purpose did you use this publication (reference, general interest,

etc.)?

• Please state your department's funCtion:

Please use the space below for specific comments which you feel would improve any
aspect of this publication. All comments become the property of Memorex Corpora­tion.

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........................................................................................................................................................................

·······1

..............................................................................................................................................................................

.

."

1

1
1
1
1

I

I

I

I