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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
1
Page
INTRODUCTION ................................................... 1-1
3
3.1
3.2
3.3
4
2
2.1
2.2
2.3
4.1
4.1.1
4.1.2
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
4.2.9
4.3
5
OPERATOR'S GUiDE ............................................... 2-1
1377 DISPLAY ................................................... 2-1
KEYBOARD OPERATION ......................................... 2-2
1377 SELECTOR LIGHT PEN .................................... 2-13
INSTALLATION .................................................... 3-1
SPECIFICATIONS ................................................ 3-1
CABLE REQUIREMENTS ......................................... 3-3
PROCEDURE .................................................... 3-3
MAINTENANCE .................................................... 4-1
DISASSEMBLY/ASSEMBLY ....................................... 4-1
Monitor Disassembly ........................................... 4-1
Keyboard Disassembly .......................................... 4-7
MONITOR ALIGNMENT ......................................... 4-10
Voltage Levels ................................................. 4-11
Horizontal Size ................................................ 4-13
Horizontal Frequency .............................•............ 4-14
Vertical Size ................................................... 4-15
Vertical Linearity .............................................. 4-16
Master Brightness ............................................. 4-17
Centering ..................................................... 4-18
Tilted Raster .................................................. 4-19
Focus ......................................................... 4-20
TROUBLESHOOTING .............................. . . . . . . . . . . . .. 4-20
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 highperformance 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 configu rations.
1377 .
20-01-3 / 76
FIGURE 1-1. MEMOREX 1377 DISPLAY STATION
1-1
1270
2701
2703
3704
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
3271-2*
·ONE TO FOUR DEVICES (STATIONS/PRINTERS)
MAYBE ATTACHED TO A SINGLE CONTROL UNIT
WITHOUT FEATURES INSTALLED. WITH FEA-
TURES, 5 TO 32 DEVICES MAY BE ATTACHED.
··ONE TO 31 STATIONS MAY BE ATTACHED TO A
SINGLE 3791 CONTROL UNIT.
-"
I
N
S/360-370
MPLX
CHNL
SLTR
CHNL
BLK
MPLX
CHNL
3271-12'
S/370
BLK
MPLX
CHNL
Fc...;U:..:L:=L-.:D:..:U:..cP..=L.::cEX-'-_ _ _ --~
SDLC LINE
3791··
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
SECTION 2
OPERATOR'S GUIDE
2.1 1377 DISPLAY
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.
1377 .20-01-3/76
FIGURE 2-1. 1377 DISPLAY
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, uppercase 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.
C. )
BACKSPACE Key-
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
Key Name
I Logical OR, Vertical Bar
@ At Sign
# Number Sign
$ Dollar Sign
% Percent Sign
¢ Cent Sign
& Ampersand
* Asterisk
Left Parenthesis
Right Parenthesis
OPERATOR CONSOLE
KEYBOARD
Key Name
=
Equals Sign
< Less Than Sign
Semicolon
Colon
% Percent Sign
Apostrophe
> Greater Than Sign
* Asterisk
Left Parenthesis
Right Parenthesis
Key
UPPER/LOWER PUNCTUATION MARK AND SYMBOL KEYS
TYPEWRITER KEYBOARD
Name Key
OPERATOR CONSOLE
KEYBOARD
Name
Underscore
M' S' mus Ign t
J
Automatic
, Repeat
Capability
+
!
-,
<
>
Plus Sign
Equals Sign
Exclamation Point
Logical NOT Sign
Colon
Semicolon
Quotation Mark
Apostrophe
Less Than Sign
Comma
Greater Than Sign
Period
? Question Mark
/ Slash
Underscore } Automatic
' , Repeat
Minus Sign Capability
+ Plus Sign
& Ampersand
¢ Cent Sign
@ At Sign
! Exclamation Point
..
$ Dollar Sign
Quotation Mark
# Number Sign
Logical OR, Vertical Bar
Comma
-,
Logical NOT Sign
Period
? Question Mark
/ 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
1377
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.
.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
~'-"'-. -.
----.
.
- ---
..
-
1377
.
20-01_3
/ 76
FIGURE
2-4. SELECTOR
LIGHT PEN
OPERATION
2-14
SECTION 3
INSTALLATION
3.1 SPECIFICATIONS
Dimensions Refer to Figure 3-1 *
Weight
Operating Clearances
Top
Bottom
Sides
Front
22 kg (49 Ib). including keyboard
15 cm (6 in.)
No requirement
8 cm (3 in.) o cm (0 in.)
3 cm (1 in.) Rear
Airflow
Power Requirements kVA
Phases
Power Cord Length
Environment. Operating
Convection only
0.085
Single
2.43 m (8 ft)
Temperature
Relative Humidity
Maximum Wet Bulb
Environment. Nonoperating
10% to 90%
Temperature
Relative Humidity
Maximum Wet Bulb
10 0 to 49
0
C (50
10% to 90%
27°C (80
0 F)
0 to 120 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
I
I
50.8 em
(20 in.)
D
0
~
L J
""
;=
I I
TOP VIEW
,
.. 39.7 em
(15.625 in.)
~
50.8 em
(20 in.)
I
30.5 em
(39--r-.8~5em_in.)
_ tT"t:;;;:·
=:=:;;;;;:r:) t
2.5 em Nom. 60.9 em Max.
(1 in. Nom. 24 in. Max.)
SIDE VIEW
I . .
30.5 em
(12 in.)
1377 .20-01-3/76
FIGURE 3-1. DIMENSIONS OF 1377 DISPLAY STATION
3-2
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:
Connector Type:
Coax Commercial Type RG-62 A/U
Commercial Type BNC UG-260 B/U
3.3
PROCEDURE
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.
COAXIAL
CABLE
KEYBOARDI
DISPLAY
INTERFACE
CABLE
FUSE
(1 AMP)
1377 .20-01-3/76
FIGURE 3-2. CABLE CONNECTIONS
3-3
AC
CABLE
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 e r a s e d . '
,
.
. . .
. , , 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
Display Station: the monitor and the keyboard. To assemble the 1377,
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
1377.20-01-3flS
MOUNTING
PLATE
SCREW
KEYBOARD/
MONITOR
INTERFACE
CABLE
FUSE
(1 AMP)
TOP
COVER
SCREW
AC
CABLE
FIGURE 4-1. MONITOR CONNECTOR PANEL
MOUNTING
PLATE
SCREW
4-1
/
M O NI T OR
T O PC OVER
M ON I TOR
AD JU S T M ENT
KNOBS
KEY B OAR D
A SM
FIGURE 4-2. DISPLAY STATION MAJOR ASSEMBLIES
4 . Remove the top cover of the monitor (Figure 4-2) .
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 mon i tor stand as shown i n Figure 4-3 .
7 . Remove the adjustment knobs .
8 . Remove the stand from the mon i tor .
13 77 .
2 0 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 INTERNAL
KEYBOARD/
MONITOR
INTERFACE
CABLE
1377 .20-01-3fla
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.
KEYBOARD
HOUSING COVER
MOUNTING SCREWS
1377 .20-01-3/76
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 /P CB 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 .
LOGIC PCB /
KEYBOARD PCB
INTERFACE CABLE
AUDIBLE
ALARM
CABLE
INTERNAL
MONITOR / KEYBOARD
INTERFACE CABLE
MOUNTING
SCREWS
KEYBOARD / PCB
1377 .
20-01-3/76
FIGURE 4-8. CABLE DISCONNECT AND PCB REMOVAL.
4-8
LOGIC PCB
MOUNTING
SCREWS
1377 .
20-01 3 / 76
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.
1377 .20-01-3176
FIGURE 4-10. HIGH VOLTAGE AREAS
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 rn
L:I
MONITOR CHASSIS
TOP VIEW
, +12 VDC
ADJUST TO
+12.00 ± .05
• -12 VDC
ADJUST TO
-12.00 ± .05
+5 VDC
ADJUST TO
+5.00 ± .05
L
~~~~~t?~~G~
'"
1 2 3 4 5
....
I rt
I
~~~G~G~G~~-~
0
6 7 8 9 10 11 12 13 14 15
LOGIC PCB
T
1
4-11 1377 .20-01-3nS
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
4-12
MONITOR PCB
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.
MONITOR
(REAR VIEW)
I I
I I
MAXIMUM ADJUSTMENT
I I
I I
I I
I I
MINIMUM ADJUSTMIONT
1377 .20-01-3/76 4-13
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.
MONITOR PCB
IDEAL HORIZONTAL FREQUENCY
1377.20-01-3/76
PARTIAL AND TOTAL MISADJUSTMENT
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
1377 .20-01-3/76 4-15
MAXIMUM ADJUSTMENT
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
RASTER
·1
CONTRAST CONTROL
(ON/OFF PUSHBUnON)
FRONT VIEW
(MONITOR)
1377 .20-01-3/76
4-17
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. .
CENTERING
RINGS
1377 .20-01-3/76 4-18
4.2.8 Tilted Raster i\lustrated below. monitor is rotated. adjusting the image. and securing the screws. thO screw on the
Image rotation is yOKE
SCREW
1377.20-01-3/76 4-19
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 highvoltage locations, refer to' the illustration p'resented in Figure 4-10.
1377 .20-01-3nS 4-20
..... w
-..j
-..j o
I
..... YES
{
/ '
OTHER
STATIONS
HAVE SAME
PROBLEM
YES
USE PEN WITH
INCREASED
INTENSITY.
YES
ADVISE
MEMOREX
THAT PROB-
LEM IS DUE
TO A PARITY
ERROR.
NO
LINE AND
COLUMN
DISPLAYED
WITHOUT
CORRES-
PONDING
NUMBERS
SWAP COAX
CABLES BE-
TWEEN SUS-
PECT STA-
TION AND A
SECOND
STATION.
/
"
/
[
RETRIED
WITH ORIG.
CABLING
POWER UP
SUSPECT
STATION
AND RETRY
FAILING
OPERATION.
ADVISE
OPERATORS
TO USE
INCREASED
INTENSITY.
REPLACE BAD
COAX CABLE.
ROTATE
INTENSITY
CONTROL
TO FULL
CLOCK-
WISE POSI-
TION.
CHECK
EXTERNAL
FUSE AND
REPLACE
IF BLOWN.
POWER UP
AND RETRY
FAILING
OPERATION.
PERSISTS
RETURN TO
OPERATIONAL
USE
FIGURE 4-11. CUSTOMER TROUBLESHOOTING
YES
YES
- - . . 1
.....
....,
N o
6
PERFORM
"CUSTOMER
TROUBLE-
SHOOTING"
PROCEDURE
(SEE FIG. 4-10).
/
/
{
.
CUST.
TROUBLE-
SHOOTING
DONE
YES
/
{(PROBLEM IN STATION; EXT. FUSE OK.)
{
BRANCH DETERMINED BY
RESUL TS OF CUSTOMER
TROUBLESHOOTING.
,
YES REPLACE PEN.
'lPROBLEM
IN
STATION
MOVE
JUMPER
CONNECTION
ON LOGIC
PCB TO
OTHER
POSITION.
(SEE FIG. 4-13)
SAME}
PROBLEM -
PERSISTS NO
NO
EXCHANGE
MONITOR/
KEYBOARD
INTERFACE
CABLE
WITH
ANOTHER
MONITOR
MEASUREMENT
LOCATION
PCB
LOGIC
LOGIC
LOGIC
MON.
PIN
5
4
3
1
MONITOR DC VOLTAGE
SPECIFICATIONS
MIN.
+ 4.95
NOM.
+ 5
MAX.
+ 5.05
-12.05
+11.95
+72.5
-12
+12
+73
-11.95
+12.05
+73.5 f-
NO
REMOVE
SPARE MON-
ITOR CHECK
DC VOLTAGES
AGAINST SPE-
VOLTAGE!} CIFICATIONS.
ADJUSTED "-
NO
"-
YES
CHECK INTER-
NAL FUSES
AND REPLACE
IF BLOWN.
(SEE FIG. 4-14)
NO
U
HE WORD "EXCHANGE" REFERS
NOT AN ACTUAL COMPONENT REPLACEMENT.
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)
NO
REPLACE
LOGIC
BOARD.
REPLACE
MONITOR
ALL FUSES OK.
PROBLEM NOT
CORRECTED.
NO
REMOVE
SPARE
LOGIC PCB.
REPLACE
STATION.
FIGURE 4-12. STATION FAULT ISOLATION AND REPAIR PJ:lOCEDURE
1377.20-01-3/76
FIGURE 4-13. LOGIC PCB JUMPER POSITIONING
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
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 respectively.
NL, EM, DUP, and FM are n, r, \ , and -,
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
0010 2
00 01 10 11
Bits
4567
Hex 00 01 10 11 00 01 10 11 00 01 10 11 00
1
+
0 1 2 3 4 5 6 7 8 9
A B e
01 10 11
0 E F
- 2 , 3
-Hex 0
0000 0 NUL OLE SP
&
-
SP OC>
"-
" -
0
0
0001 1 SOH SSA / a j 1:
1
A J 1
SYN
Bits
- 0 , 1
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 A
STX EUA
ETX Ie
EM
PT NL
EM
ETS
ESC EOT
¢ !
I
I b k c 1 s
2
B K S 2 t
3 e L T 3 d m u
4 0 M U 4 e n v 5
E N V 5 f
9 P h q i
0 r
W 8
F 0 W 6 x
7 G P X 7
Y 8
H Q Y 8 z I I R Z 9
1011
1100
1101 0
1110
1111
S e
E
F
OUP RA <
$
.
SF ENQ NAK ( ) -
%
FM
ITS
+
SUB
I
-,
>
?
#
@
_.
" l
1
#J. 7r So TM
f
[ > rnJ
•
\
+
~
}
-
J -
•
-
±
-
X /\
1377 .20-01-3/76 5-1
COMMENTS FORM
1377 DISPLAY STATION OPERATION AND SERVICE MANUAL-1377.20-01
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