Lear Siegler ADM-2 User manual

ADM-i
MaintenanceManual

PREFACE
This manual contains installation, maintenance, operation, and related theory necessary to maintain and
troubleshoot the ADM-2 Interactive Display Terminal. Abrief description
of the unit and its options are
included in the manual to assist the service technician in maintaining the equipment. For additional infor-
mation on the ADM-2, write:
Lear Siegler Inc.
714 N. Brookhurst St.
Anaheim, CA 92803

TABLE OF CONTENTS
Section Page
INTRODUCTION
1-1
1.1 USE AND CAPABILITIES ..................................... .. 1- 2
1.2 PHYSICAL DESCRIPTION AND SPECIFICATIONS 1-5
1.3 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 1-9
2
3
INSTALLATION .
2.1
GENERAL INFORMATION .
2.2 UNPACKING .
2.3 INSTALLING
THE ADM-2 .
2.4 INSTALLING OF ADM-2 OPTIONS .
2.4.1
Data Interfaces .
2.4.2 Serial
Printer Interface .
2.4.3 Polling Interface .
2.4.4 Word
Structure .
2.4.5
Power Option .
FUNCTIONAL DESCRIPTION .
3.1
GENERAL .
3.2 CRT MONITOR AND DISPLAY .
3.3 KEYBOARD .
3.4 MAIN LOGIC BOARD .
3.5 POWER SUPPLY .
3.6 RS-232-C DATA INTERFACE .
3.7 OPTIONS .
3.7.1 Serial
Printer Interface .
3.7.2 Polling In terf ace ..........................................
3.7.3 Additional
Data Interfaces .
2-1
2-1
2-1
2-1
2-3
2-3
2-3
2-3
2-4
2-4
3-1
3-1
3-2
3-2
3-2
3-3
3-3
3-5
3-5
3-5
3-8
THEORY OF OPERATION .
44.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.1.9
4.1.10
4.1.11
4.1.12
4.1.13
4.1.14
4.1.15
4.2
4.2.1
4.2.2
4.2.3
4.2.4
MAIN LOGIC BOARD .
Clock (Schematic P.
2) .
Counters (Display Generation) (Schematic P. 2) .
Tristate Bus (TSB) (Schematic
P. 13) .
Microprocessor Logic .
Keyboard Logic (Schematic P. 17, 19) .
External Interface Logic (Schematic P. 20-23) .
Video Logic (Schematic P.
5,6,7, II, 12, 19) .
Data Memory Address Logic (Schematic P. 3) .
Protect Mode Logic (Schematic P. 19) .
Program
Counter Logic (Schematic P. 8) .
Reset Logic (Schematic P. 17) .
Beeper Logic (Schematic P. 17) .
Optional Timeout Logic (Schematic P. 17) .
Polling
Option Logic (Schematic P. 17) .
Printer Interface Option (Schematic P. 23) .
MONITOR LOGIC .
Video Amplifier .
Vertical Deflection .
Horizontal Deflection .
Low Voltage Regulated Supply .
4-1
4-1
4-1
4-1
4-4
4-6
4-9
4-9
4-16
4-19
4-19
4-19
4-20
4-20
4-20
4-20
4-20
4-20
4-20
4-21
4-22
4-23

Section
5
TABLE OF CONTENTS (Continued)
OPERATOR CONTROLS &KEYBOARD .
5.1 ADM-2 BACK PANEL CONTROLS .
5.1.1 Power
ON/OFF Switch .
5.1.2 Mode Selector Switch .
5.1.3 EIA Switch .
5.1.4 Baud Rate Switch .
5.1.5 Contrast Adjustment .
5.1.6 Brightness
Adjustment .
5.2 KEYBOARD .
5.2.1 Data Keys .
5.2.2 Shift Lock Key .
5.2.3 Special
Function Keys .
5.2.4 Control Keys .
5.2.5 Status Keys .
5.3 BASIC OPERATOR
PROCEDURES: .
5.3.1 ADM-2 System Start-Up .
5.3.2 Initiating Escape Sequences .
5.3.3 Formatting Control .
5.3.4 Data Editing .
5.3.5 Cursor Control .
5.3.6 Data Transmission Control .
5.4 OPERATOR
PROCEDURES-POLLING MODE .
5.4.1 Polling Addressing Dialog .
Page
5-1
5-1
5-1
5-1
5-1
5-1
5-2
5-2
5-2
5-2
5-2
5-2
5-2
5-2
5-11
5-11
5-11
5-13
5-13
5-14
5-15
5-15
5-16
6LOGIC BOARD (MICROCONTROLLER) PROGRAMMING .....
.. 6-1
7MAINTENANCE .
7.1 PREVENTIVE MAINTENANCE (PM) .
7.2 ADJUSTMENTS .
7.2.1 Synchronization and Drive Signals .
7.2.2 Low Voltage Supply .
7.2.3 Brightness .
7.2.4 Video Contrast .
7.2.5 Vertical Adjustments .
7.2.6 Horizontal Adjustments .
7.2.7 Focus Adjustment .
7.2.8 Centering .
7.2.9 Power Supply Adjustment , .
7.3 CORRECTIVE MAINTENANCE .
7.4 REMOVAL AND REPLACEMENT .
7.4.1 Keyboard , .
7.4.2 Display Unit Cover .
7.4.3 Upper Chassis .
7.4.4 ADM-2 Logic Board .
7.4.5 Monitor Logic Board .
7.4.6 Monitor Assembly .
7.4.7 Power Supply .
7.4.8
Component Replacement .
7.5 TROUBLESHOOTING THE ADM-2 .
7.5.1 Fault Isolation .
7.5.2 Fault Location Determination .
7.6 RETURNING EQUIPMENT
FOR REPAIR .
ii
7-1
7-1
7-1
7-1
7-1
7-1
7-1
7-1
7-2
7-2
7-2
7-2
7-2
7-2
7-3
7-3
7-3
7-3
7-3
7-3
7-3
7-3
7-4
7-4
7-9
7-16

TABLE OF CONTENTS (Continued)
Appendix Page
AADM-2
PARTS LIST A-I
BADM-2 WIRE LIST, CABLING, &
PIN ASSIGNMENTS B-1
CADM-2 OPTION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. C-l
DADM-2 SUBASSEMBLIES D-1
KEYBOARD 0 • 0 ••• 0 •• 0 ••••• ,D-3
MONITOR 0 ••• 0 •••••••• 0 0 ••••••••• 0 0 • 0 0 ••••••••• 0 • • • • • • • • • • • •• D-11
POWER SUPPLY 0
•••• 0 •••••••••••••••••••••••••••••••••••••••••• 0 0 • 0 D-15
EADM-2
LOGIC DIAGRAMS .. o0 ••••• 0 •• 0 •• 0 ••••• 0 ••••••••• 0 0 ••• 0' ••• E-1
-7 0 •••••• ; ••• 0 ••••• 0 ••• 0 • 0 •••••••••• 0 •••• 0 •••• 0 •••••• 0 ••••••••• E-2
-13 0
••••••••• 0 •••••••• 0 •••••••••••••••••••••••• 0 •• 0 0 • 0 ••••••••• 0 • •• E-25
FADM-2
PoCo BOARD ASSEMBLY 0 0 ••• 0 •••••••••• 0 ••• 0 0 •••• 0 • • • • • • •• F-1
GADM-2
CIRCUIT BOARD 0 •• 0 •••• 0 0 •••• 0. 0 •• 0 • 0 ., G-1
iii

Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
3-1
3-2
4-1
4-2
4-3
4-4
4-5
4-6
4-7
5-1
5-2
5-3
5-4
5-5
5-6
5-7
6-1
7-1
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
LIST OF ILLUSTRATIONS
ADM-2 Functional Makeup .
ADM-2
Character Format (By Ascending ASCII Codes) .
ADM-2
Keyboard .
ADM-2
Printed Circui1 Board .
ADM-2
Power Supply .
ADM-2
Interactive Display Terminal .
Word Format Codes .
ADM-2
Functional Operation Block Diagram .
ADM-2 Main Logic
Board Data Flow Path Block Diagram .
ADM-2 Logic
Board Block Diagram .
ADM-2 Main Logic Board Detailed Block Diagram .
Tristate Bus and Elements that Use It .
Microprocessor Logic Block Diagram .
ADM-2
Asynchronous Receiver/Transmitter (UART) Block Diagram .
Video Logic
Block Diagram .
Cursor Logic Block Diagram .
ADM-2 Back Panel View .
Poll
Function Dialog, Flow Diagram .
Select
Function Dialog, Flow Diagram .
Sequential Select Function Dialog, Block Diagram .
Fast Select Function Dialog, Block Diagram .
Broadcast Select Function Dialog, Block Diagram .
Send Function Dialog, Flow Diagram .
ADM-2
Microcontroller Program Example .
No
Video Display/Erratic Video Flow Chart .
I/O Problems Flow Chart .
No Characters
on Screen Flow Chart .
Test POillt Data ; .
Null Codes
Required Versus Transmission Speeds .
Monitor Voltage Waveforms .
Input Signal Format .
Monitor Circuit Board Component Location .
Main Logic Board Assembly
with Terminal Locations .
iv
Page
1-1
1-2
1-3
1-4
1-4
1-5
1-9
3-1
3-2
4-2
4-3
4-5
4-7
4-11
4-17
4-18
5-1
5-17
5-18
5-19
5-20
5-21
5-22
6-10
7-5
7-6
7-7
7-8
7-9
7-10
7-11
7-12
7-15

Table
1-1
1-2
2-1
2-2
2-3
2-4
2-5
3-1
4-1
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11
6-12
7-1
7-2
7-3
LIST OF TABLES
ADM-2 Specifications .
ADM-2
Monitor Specifications .
RS-232-C
Data Interface Connector J 1 Signal/Pin List .
20ma Current Loop Data Interface Connector J1Signal/Pin List .
RS-232-C Auxiliary
Interface Connections .
Transmission Baud
Rate Select .
J3 Serial Printer Interface Connector .
Tristate Bus Connected Registers .
UART Specifications .
ADM-2
Keyboard Operations .
ASCII Codes
with Associated Keys .
Special
Function Keys with Transmitted Codes .
Status Displays .
ADM-2 Binary Codes .
Formatting Aids .
Data Editing Commands .
ASCII Code Cursor Positioning .
Block Transmission
Functions & Controls .
ADM-2
Functional Units .
ADM-2
Instruction Set .
Tristate Bus Control .
Display
Control .
Utility Register
Control .
RAM Address
Con trol .
Random Access Memory Control .
Table
of Flags .
Auxiliary
Asynchronous Receiver/Transmitter Control .
ROM
Instruction Execution Sequence Control .
Miscellaneous
Control Instructions .
Condition Instructions .
ADM-2 Failure Analysis Guide .
Monitor Troubleshooting Guide " .
Main Logic Board
Terminal Identification Chart .
v
Page
1-6
1-8
2-1
2-2
2-2
2-2
2-3
3-4
4-12
5-3
5-5
5-10
5-10
5-12
5-13
5-13
5-14
5-15
6-1
6-2
6-3
6-3
6-4
6-4
6-5
6-6
6-6
6-7
6-7
6-8
7-4
7-9
7-14

SECTION ONE
INTRODUCTION
The ADM-2 Interactive Display Terminal is a
microprogram-controlled device
that provides a
means
of communicating with aremote computer
and can offer the user the ability to do some
limited independent processing
at the display
area.
The terminal is acomplete self-contained unit.
Included within the terminal's lightweight hous-
ing
is afan, cabling, and all required hardware.
The keyboard
is housed in aseparate enclosure
but can be mounted with the ADM-2 terminal, if
desired. The ADM-2 terminal consists of four
main functional sections, which are:
•Cathode Ray Tube (CRT) display and
monitor
Circuit Board with microcontroller, memory
and logic
•Power Supply
•Keyboard with key encoding electronics.
Figure
1-1 illustrates the functional makeup of
the ADM-2.
An
ADM-2 character page (full screen) contains
24 character lines, each with 80 character posi-
tions, providing atotal display capacity
of 1920
CRT
DISPLAY
LOGIC BOARD
WITH
MEMORY
KEYBOARD
characters per page. Display fields are refreshed
at arate set by acrystal oscillator synchronously
with
60 Hz input power in the standard terminal.
This rapid refresh rate generates flicker-free images
and high contrast display even in bright light.
The ADM-2 transmits data
to the computer (or
data set) via astandard RS-232-C data interface.
The standard code for ADM-2 transmissions is
aten-bit asynchronous serial ASCII code with
even parity.
The ADM-2 can emulate an ADM-l by using
special sequence codes designated for this purpose.
When emulating an ADM-I, with aserial printer,
unformatted print must be specified by the
program.
Optional equipment available with the ADM-2
include:
•Line Printer interface
•Polling interface
•20ma Current Loop interface
•RS-232-C Extended interface
•Optional word structures in addition
to the
ten-bit code
•Composite Video.
INTERNAL
POWER
SUPPLY
Figure 1-1. ADM-2 Functional Makeup
1-1

1.1 USE AND CAPABILITIES
The ADM-2 consists of four main sub-units: the
monitor and display, keyboard, logic board, and
power supply. These sub-units, along with their
capabilities, are described below.
protect against overwriting, or show blank fields
(for security reasons). The display also contains
eight status indicators.
The monitor is asolid-state, all transistorized unit
featuring printed circuit board construction. The
monitor is used to display alphanumeric data. All
data characters and controls may be entered
on
the screen from the keyboard or received from a
remote computer. Reverse image display is auto-
matically enabled any time the cursor is positioned
over data. Display fields may be set to: blink,
The standard ADM-2 character set contains 96
ASCII characters. Acomplete ADM-2 standard
character set is depicted in Figure 1-2. Control
characters can be displayed if transmission from
computer or keyboard is preceded by an ASCII
ESC Ucode sequence, setting the program mode.
There are 32 control characters in the standard
character set.
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Figure 1-2. ADM-2 Character Format (By Ascending ASCII Codes)
1-2

The ADM-2 keyboard contains 118 keys. A
rollover feature has been incorporated in
the key-
board
to protect against mis-keying. (If akey is
depressed before apreviously depressed key is
released, the second key code cannot be transmit-
ted until the first depressed key has been released.)
The keyboard can be removed from the ADM-2
display unit enclosure and placed up to five feet
away. Figure
1-3 illustrates the standard ADM-2
keyboard.
PROG ICONV
MODE MODE
PAGE
TAB
SOM
BACK
SET EOM
PAGE t
CR
FWD
..
HOME
..
RESET •
NEW
LINE
- I
TAB
789
456
123
,•
Figure 1-3. ADM-2 Keyboard
1-3.

All ADM-2 functions are controlled by asingle
printed circuit board. This
is the only logic board
in the ADM-2, with the exception
of the power
supply assembly. The logic board contains
the
microcontroller, display memory, logic electronics,
transmission rate control, and data interface
electronics. Figure
1-4 shows the ADM-2 printed
circuit board.
Figure 1-4.
ADM-2 Printed Circuit Board
The ADM-2 power supply provides the main logic
board with +5V
DC. The power supply is rated
at
12 amps and contains an internal voltage regula-
tor, current limiter, and overvoltage protection.
The power supply
is capable of supplying the
display terminal functions with aload regulation
of .075%. The power supply is shown in Figure
1-5.
-OUT
r--------- -- -----------------------,
2 I 03 Rll I
I REGULATOR CARD :
I C1 Rl R2 R3 Wl I
I,..., I
3I
+SENSE
I
II
a:
CR1 I
LU
I
CR5
LUli:
C5 C6 I
....
(,9-
I
~ol-
o-u
IR15 I
~a:LU
+
Cl0l
R23 :>coa: I
I6
R24
I
R18 R20
I-SENSE
IOVP
ADJ
I
Fl
+ OUT
R6
IN-
II
L!
Figure 1-5. ADM-2 Power Supply
1-4

1.2 PHYSICAL DESCRIPTION AND SPECIFICATIONS
The ADM-2 Interactive Display Terminal is shown
in Figure 1-6. The dimensions are
noted in the
figure.
Table
1-1 lists the specifications of the ADM-2.
Table 1-2 lists
the monitor specifications of the
ADM-2
unit.
Figure 1-6. ADM-2 Interactive Display Terminal
1-5

Table 1-1. ADM-2 Specifications
GENERAL Security Fields Display
is suppressed
(no display)
Input Power:
Standard
l15V, 60Hz Protected Fields Reduced intensity for
write
protect
Optional 230V, 50Hz Cursor:
Input Connector Type Receptable, molex
Format
Reverse video block
number 03-06-1041
Unit mating plug, molex Controls Forespace, backspace,
number 03-06-2041 upline, downline, new
line, return,
home, tab,
OperatingTemperature 50 to 500Cback-tab, position ad-
(41 0
to 1220 F)
dressing, position reading
Storage Temperature -100
to 65 0CScreen
12" (diagonally);
(500to 149 0
F)
rectangular CRT with
etched non-glare surface
Humidity
5% to 80% non-condensing Resolution (TV lines)
900 at 40 fl. (center)
Altitude Operates up
to 10,000 feet
800 at 40 fl. (corner)
Dimensions (overall)
l2Y2"H"x 20Y2"W x 24"L Display Format:
Weight Standard 1920 characters
501bs 24 lines
of 80 characters
DISPLAY Character Set:
Generated 128 ASCII characters
Lines
of Characters 24 (upper/lower case,
numeric, punctuation,
Characters
per Line 80
control)
Displayed
64 ASCII characters
Character Positions 1920 standard (upper case, numeric,
punctuation)
Screen Phospher White (P4) Character Generation:
5" by 7" dot matrix
Face Plate Etched Height
0.18"
Refresh Rate 60 pages per second Width
0.075"
Status Displays 8(with printer) Cursor
7" by 9" rectangle
Homes to upper right
Control Character Refresh Rate:
Display
32
Standard 60Hz
Blinking Field Rate 4per second Optional 50Hz
Page Roll From
bottom to top
Dimensions (display)
12Y2"H x 20Y2"W x 17"L
1-6

Table 1-1. ADM-2 Specifications (Continued)
MEMORY COMMUNICATIONS
Storage Capacity 1920 characters Interface:
Standard EIA RS-232-C
Security Locations Display suppressed Optional 20 milliamp current loop;
Extended RS-232-C
port
Control Character In program mode, direct
Storage from keyboard or Data Transfer Rates:
computer
Standard
110,150,300,600,1200,
240~480~and9600baud
Protected Fields Character_protect bit
Optional 1800 baud
enabled
Send/Receive Modes Full duplex,
half duplex,
or block (line, page, or
message, all or fore-
ground)
KEYBOARD Optional Interface
Mode Operation Polling
Construction Solid-state logic; similar
to ateletypewriter layout Code for Transmission Asynchronous ASCII
(data keys); separate unit
with 5' cable Word Format:
Standard 10-bit code
Character &Control Optional 9, 11,
or 12-bit code
Keys 68 Parity:
Cursor&
Format Keys 14 Standard Even
Optional Odd, fixed bit
or none
Numeric Keys Pad 14
Function Keys
16
DATA EDITING CONTROLS
Transmission Send
Can
tro1 Keys Page, line, message, print Keyboard Editing:
Character edit Type over, insert, delete
Interlocking Feature Rollover protection
of
Line edit Insert, delete, erase
to
keys end
of line
Key Operation Force 2ounces Page edit Clear all
or foreground to
nulls or spaces; erase to
end of page (replace all
Lighted Mode Keys Shift lock,
prot mode,
or foreground with nulls
write protect, program,
or spaces)
conversation, page edit Computer Controlled All
of above with receipt
Dimensions (keyboard) 3%"H x20%"W x
9"L
Editing
of an ESC sequence.
1-7

Table 1-2. ADM-2 Monitor Specifications
GENERAL
Temperature:
Operating range
Storage range
5.° to 55° C
(41 0
to 13 10 F)
-40° to 65° C
(-400
to 149° F)
Video Amplifier:
Bandwidth
Rise and fall times
(10%
to 90% ampli-
tude)
Storage time
12MHz (-3db)
Less than 35 nsec
(linear mode)
15 nsec, maximum
(linear mode)
Retrace and Delay Times:
Vertical
900 usec retrace,
maximum
Humidity
Input Voltage
5%to 80% non-condensing
105V
to 130V rms
(120V nominal) Horizontal 7usec retrace plus 4usec
delay, maximum
INPUT DATA REQUIREMENTS
Pulse Rate
or Width:
Video Pulse width =100 nsec or
greater
Vertical drive signal Pulse
rate=4 7 to 63 pulses
per second
Horizontal drive signal Pulse rate =15000
to
16500 pulses per second
Input Frequency:
Standard
Optional
Output Voltages
Input Power
X-Ray Radiation
CONTROLS
60Hz
50Hz
+15V DC (short circuit
protected)
+12KV DC; 12.6V rms
24 watts (nominal)
Comply
to DHEW rules-
42-CFR-part 78
Input Connector Printed circuit board
edge connector (Viking
number 2VK1 OX/ 1-2
or Amphenol number
225-21031-101)
Contrast 500 ohm potentiometer
carbon composition;
appx. 1/8 watt
Amplitude:
Video low
Video high
0.0
to OAV
4V (± 1.5V)
ELECTRICAL
Minimum Maximum
Shunt Shunt
Input Impedance: Resistance Capacitance
Video input 3.3K ohms
40 PF
Vertical drive input 3.3K ohms
40PF
Horizontal drive input
470 ohms
40 PF
GEOMETRIC DISTORTION
The perimeter
of afull field of characters will be
an ideal rectangle
to within ±1.5% of the rectangle
height.
Signal Rise and Fall Times
(10%
to 90% amplitude):
Video Less than 20 nsec
Vertical drive signal Less than 100 nsec
Horizontal drive signal Less than 50 nsec
Shown in Figure 7-2Input Signal Format
100kilohm potentiometer;
appx. 1/8
watt
Brightness
1-8

1.3 OPTIONS
The following
options are available for use with the
ADM-2:
• A serial
printer interface which allows the
ADM-2 to control aserial character printer
using RS-232-C standards. Operation of the
printer may be initiated from the keyboard or
remotely from the computer. A number of
baud rates are available to accommodate
various printers.
• A polling interface
is available which allows
the ADM-2 to act as apolling tenninal in a
multipoint communications network. When
the polling option is present, the ADM-2 is
prevented from initiating transmissions except
under control of the network control center.
All message transmission
is between the net-
work control center and
the selected terminal
or terminals. Operation of the communica-
tions
network and interaction of the ADM-2
terminals with
the center is controlled entirely
by apolling/addressing dialog initiated by
the
center.
•The ADM-2 comes with astandard RS-232-C
data interface. An extension for this interface
is available for driving a printer or other
device with EIA RS-232-C voltage level
signals. This interface appears
to the auxiliary
device
as though the terminal were a data set.
• A
20ma current loop interface is also available
for the ADM-2. This interface complements
the standard RS-232-C interface
that comes
with
the ADM-2.
•The ADM-2 is equipped for standard
60 Hz,
110 volt AC power. 50 Hz and/or 230volt AC
power input are easily accommodated. The
monitor supply transformer, power supply
transformer, and
input voltage connections
to the main logic board can be reconnected
for
230 volt AC.
• A word
structure option allows the ADM-2
to transmit and receive data characters in
anyone of the asynchronous characterformats
shown in Figure 1-7. This
option permits
the codes shown
to be used in addition to,
and not in place of, the ADM-2 standard ten
unit code. Codes are selected by re-strapping
the synchronous receiver/transmitter chip
on the main logic board.
•The composite video
option converts video
and sync signals from ADM-2 terminals
to
acomposite video output through the use of
an internal piggyback board. Data is then
transmitted to acompatible composite video
monitor located up to 1000 feet away through
asingle coaxial cable.
The composite video
option provides the
capability
of locating the control terminal
in an area separate from
the electronics,
making it ideal for such applications as
airport control towers, emergency communi-
cations centers, hospital areas, and
other
environments in which it is necessary to
locate the terminal some distance from the
computer.
Ten unit code with odd parity.
Ip~~6YI STOP I
JSTARTI
234567
Ten unit code with parity bit = "1"
JSTARTI
234567
I~~~~:I STOP I
Figure 1-7. Word Format Codes
1-9

Ten unit code with parity bit = "0"
JSTARTI
234567
Ip~:~~yl STOP I
Eleven unit code with even parity.
JSTARTI
234567
IptJ~~YI STOP Ep I
Eleven unit code with odd parity.
JSTARTJ
234567
Ip~~iiyl STOP Ep I
Eleven unit code with parity bit = "I"
JSTARTI
234567
I~~~J,:! STOP I
Eleven unit code with parity bit = "0"
JSTART I234567
Ip~:~~yl
STOP ISTOP I
A "protect" bit in the bit 8position may be transmitted or received by the
ADM-2. With this arrangement, the following formats can be accommodated.
If bit 8= I, the protect bit will be written = 1.
Ten or eleven unit code (one or two stop bits) with no parity bit.
JSTART 1 2_"""-_3 4 5_--L.._
6
_......_7
_-'-_8_* _I STOP
Eleven or twelve unit code (one or two stop bits) with even or odd parity.
JSTART 1 .........
2
_"""-_3 4 5 _"--_6_-40-_
7_
Figure 1-7. Word Format Codes (Continued)
1-10

SECTION TWO
INSTALLATION
This section contains installation instructions for
the ADM-2 Interactive Display Terminal. Acheck-
out procedure for the unit is also included.
2.1 GENERAL INFORMATION
The ADM-2 Interactive Display Terminal
is suitable
for desk
or tabletop mounting in any normal office
or commercial environment. All that is required
for installation
is apower connection, data signal
interface connection
to either the computer or the
optional printer, and interconnecting cable connec-
tion between
the keyboard and display unit.
2.2 UNPACKING
The
ADM-2 units are packed using standard practices
for shipping
of electronic equipment. Every precau-
tion
is taken to ensure that each unit is complete
and ready for installation upon arrival at
the cus-
tomer site. However, it is recommended that each
unit be inspected
upon receipt for intransitdamage.
Inspect for exterior evidence
of damage. Contact
the carrier and LSI immediately if damage is evident,
specifying the nature and
extent of the damage (if
known).
If there is no apparent shipping damage, open the
shipping carton and remove the items, checking
them against
the shipping list to verify carton
contents. Contact LSI immediately in the event
of apacking shortage.
Check
that the serial number of the unit corresponds
to that shown on the invoice. Visually inspect the
exterior of the enclosure for evidence of physical
damage which may have occurred in shipment.
Check the hardware
to determine if any assemblies
or screws have been loosened during shipment.
Tighten
as required. Inspect for dust or foreign
material which may impair electrical
contact when
cable connections are made. Vacuum
to remove
any loose dirt.
The ADM-2
is now ready for installation.
2-1
2.3 INSTALLING THE ADM-2
The ADM-2 unit is fully assembled and operationally
checked prior
to shipment from the factory. Only
the interconnecting cable, interface, and power
must be connected at the site. The physical dimen-
sions
of the unit are shown in Figure 1-6. Installa-
tion power and environmental parameters are
depicted in Table 1-1. In determining
the installa-
tion area required, consideration must be given to
access, power outlet required (a three prong plug),
and environmental conditions. The
unit also
requires atable
or desk for mounting.
To install the ADM-2 unit, proceed as follows:
a. Connect the data interface cable to the ter-
minal using the information provided in one
of the following tables:
RS-232-C interface: Table 2-1.
20ma current loop interface: Table 2-2.
RS-232-C auxiliary interface: Table 2-3.
Table 2-1. RS-232-C Data Interface
Connector
J1Signal/Pin List
PIN NUMBER SIGNAL FUNCTION CODE
1Equipment Ground
AA
2Transmit Data
BA
3Receive Data
BB
4Request
to Send CA
5Clear
to Send
CB
6Data Set Ready
CC
7Signal Ground
AB
8Received Line Signal CF
Detector
20 Data Terminal Ready CD

Table 2-2. 20ma Current Loop Data Interface
Connector J1 Signal/Pin List
PIN NUMBER SIGNAL FUNCTION CODE
1Equipment Ground AA
4Request
to Send CA
5Clear
to Send
CB
9Current Loop Power
(+20V through 910 ohms)
10 Current Loop
Output +
11
Current Loop Return -
12
Current Loop Input +
13
Current Loop Return -
14 Current Loop Power
(+20V through 910 ohms)
NOTES:
1.
Current loop power (20 volts) is available on
pins 9 and/or 14, if required.
Table 2-3. RS-232-C Auxiliary Interface
Connections
FUNCTION PIN NUMBER
Data
Out to Device Pin 3(on BB)
Direct Connect (Two Wire) Pin 9
Option (129511) Pin 14
Handshaking with the Device
Done through EIA Signal
CD
Pin 20
b. If the ADM-2 has aprinter and/or polling
interface option, refer to Section 2.4 of
this manual.
c. Connect the cable between the keyboard
and display unit.
d. Check the ON/OFF switch to ensure it is in
the OFF position.
e. Plug the ADM-2 into agrounded AC outlet
of the proper voltage.
2-2
(FOR STEPS f-h, THE SELECTOR SWITCHES
ARE LOCATED ON THE REAR OF THE UNIT.)
f. Select the transmission baud rate in accor-
dance with Table 2-4.
Table 2-4. Transmission Baud Rate Select
BAUD RATE SWITCH SETTING
(Thumb Wheel Type)
110 7
150 6
300
5
600 4
1200 3
2400 2
4800
1
9600 0
g. Select mode (B=block, F=full, H=half) with
mode select switch.
h. Set EIA switch
to the left for RS-232-C
interface (standard)
or to the right for the
optional current loop interface.
i. Proceed to ~heck out the ADM-2 unit.
The ADM-2 unit
is checked out with the following
procedure:
a. Set the ON/OFF switch on the rear of the
ADM-2 to
the ON position.
b. Check to see that the fan starts when power
is turned on. If it does not, check the power
switch and push red circuit reset button.
c. At
turn on, listen for an audible tone that
lasts approximately one second. If no tone
is heard, look for cursor as in step dbelow.
d. If the cursor does not appear after anormal
warm-up period, press the HOME key.
If
this fails to produce the cursor, reset the
display by pressing the key.
If there is still
no cursor, it is possible the brightness and/or
contrast controls are misadjusted. They are
adjusted
as follows:
1. Set the contrast control to the middle of
its range.

2. Turn the brightness control clockwise
until the screen
is bright, then reduce
brightness slowly until
the background
is barely visible. The cursor should be
present.
3. Adjust brightness and contrast for desired
presentation.
4.
If the cursor does not appear, check the
power supply voltage; replace the moni-
tor if necessary.
e. To check out transmittal and receival of data
to and from a computer or modem in the
non-block mode, proceed as follows:
1. Place the mode select switch in F(full)
position.
2. Depress conversation mode key.
3. Remove the cable from the terminal out-
put connector and jumper pins 2and 3
together, and pins 4and 5together,
on
the terminal connector.
4. Type something on the keyboard; what-
ever
is typed on the keyboard should
appear on
the screen.
f. Test the function of the character storage in
memory by doing the following:
1. Run the cursor to the bottom of the
display.
2. Test the page roll functioning
of display
characters by filling up aline, forcing
the
page to roll upward.
3. The memory storage
of characters can
be assumed
to be working if the roll
function operates correctly.
2-3
2.4 INSTALLING OF ADM-2 OPTIONS
2.4.1 Data Interfaces
The 20ma Current Loop interface complements
the standard RS-232-C data interface. Table 2-2
lists
the proper 11 connections for the optional
data interface. 1I is connected to the computer,
modem or acoustic coupler via cable.
The RS-232-C
Extended interface is used as an
auxiliary interface, enhancing
the standard RS-232-C
capabilities
of the ADM-2. This interface connects
to the next terminal in line via cable connector 12.
Table
2-3 lists the proper pin connections for this
interface.
2.4.2 Serial Printer Interface
The Serial Printer interface
is connected to the 13
plug
(at the rear of the ADM-2 unit) via cable con-
nector. The pins listed in Table 2-5 are utilized for
printer operation.
Table 2-5. 13 Serial Printer Interface
Connector
PINS FUNCTION
1
Equipment Ground
3Serial Data to Printer
6Terminal RTS (Request to Send) to Printer
7Signal Common
8ADM-2 Ready
20 Printer Ready
2.4.3 Polling Interface
The ADM-2 terminal
must be assigned adevice
address,
to identify the terminal, when operating
in the polling mode. Any
of the 96 ASCII characters
may be assigned
to the terminal as its device code.
The terminal will recognize and respond only
to a
header containing its device address code.
To select the terminal's device address, aDIP switch
device, with eight rocker switches, has been pro-
vided
at the bottom of the ADM-2 unit. To set the
address, proceed as follows:
a. Turn the ADM-2 unit on its side to expose
the bottom panel. The DIP switch is acces-
sible through
the opening in the panel.