Teletype Dataspeed 4500 Series User manual
BELL SYSTEM PRACTICES
AT&TCo
Standard
SECTION
582-311-500
Issue
1,
April
1980
"DATASPEED*"
4500
KEYBOARDS
TESTING AND TROUBLESHOOTING
CONTENTS PAGE
1.
GENERAL.....................
1
2.
TESTING.
. . . . . . . . . . . . . . . . . . . . . 1
3.
TROUBLESHOOTING.
. . . . . . . . .
..
10
1.
GENERAL
1.01
This section provides testing
and
trouble-
shooting for
the
DATASPEED
4500
series
keyboard
as in Fig.
1.
45K301GAA/03
Keyboard
Without Magnetic Stripe
Reader
45K301GAA/02
Keyboard
With Magnetic
Stripe
Reader
Fig.
1-DATASPEED
4500
Keyboards
1.02
Whenever this section
is
reissued,
the
reason
for
reissue will
be
listed in this
paragraph.
*Registered
Trademark
of
AT&TCo.
Note: When ordering replaceable
parts,
prefix
each
part
number
with
the
letters
"TP"
(ie,
TP123456),
unless otherwise specified.
1.03
The
extent
of
the
testing
and
trouble-
shooting
procedures are limited
to
that
which
is
required
for
correction
of
troubles
or
replacement
of
parts in field locations.
1.04
Refer
to
Section 582-311-100
for
infor-
mation
providing description
and
opera-
tion
of
DATASPEED
4500
series
keyboards,
Section 582-311-400
for
wiring,
and
Section
582-311-700 for adjustments, disassembly/reas-
sembly
and
parts
information.
1.05
The
reference manual associated
with
the
DATASPEED
4500
series
keyboard
is:
999-300-140
How
to
Operate
Synchronous
DATASPEED
4540
Keyboard Display.
2.
TESTING
2.01 Operational
checkout
procedures are pre-
sented
in
Tables A through D. Use all
applicable tables
to
assure complete
operation
after
maintenance
or
to
isolate a
poorly
defined
trouble
area.
2.02 Perform
the
checkout
in
the
order
pre-
sented.
The
required response for each
test
step
is
.shown.
If
the
unit
under
test
fails
to
respond
correctly
to
a
test
step,
go
to
3. TROUBLESHOOTING.
2.03
The
keytop
identification can be
found
in Fig. 4.
Prepared for American
Telephone
and
Telegraph
Company
by
Teletype
Corporation
©
1980
by
Teletype
Corporation
All rights reserved
Printed
in
U.S.A. Page 1
SECTION 582-311-500
2.04 Typical
setup
for testing a 45K301GAA keyboard is shown below.
45K30lGAA
KEYBOARD
452015
CABLE ASSEMBLY
\
Note: Neither a 45CAB501 cabinet
or
a 45B301 base is required.
Fig. 2
Page 2
45C340
CONTROLLER
\
ISS
I,
SECTION 582-311-500
2.05 Tables A
and
B should be performed for
any
KD device having
trouble.
Table C
is
only
used for
keyboards equipped with a magnetic stripe reader (MSR). See Section 582-300-500
for
KD/CON-
TROLLER
LOCAL TEST.
Caution: When the sec
is
on-line, and a
KD
is
attempting to perform the loopback portion (Step 6)
of
the test, the sec will ignore the line (from computer) for 500 ms. During this time, poll
or
select
sequences may
be
missed.
If
two
or
more KDs
are
attempting to perform the loopback portion
of
the test
simultaneously, the sec will ignore the line for 500 ms for
each
KD
attempting the test. This may cause
the sec to miss several poll
or
select
.~equences
and therefore
fail
to respond to the computer, thus causing
the computer to stop polling the sec. For this reason, it
is
suggested that
an
interval
of
at least ten
seconds
be
provided between performing the loopback portion
of
the test at each KD being tested.
2.06 Power
up
in
the
following sequence:
SCC (45C340 Controller, Fig. 2),
Display Base
AC
Power Switch,
Monitor
AC Power Switch,
then
adjust
to
full brightness.
MONITORAC
POWER SWITCH
DISPLAY BASE·
AC POWER SWITCH
DISPLAY BASE
RUN
INDICATOR
MONITOR
BRIGHTNESS
Fig.
3-Display
Base
and
Monitor
IJJJJJ
-+-
7 8 9 I
* 4 5 6 .
I!iI
1 2 3
ri1
u
....
-0
(HTIEP
".
''''''
OVER-TRAVEL
LJ
[5
Q 0
INDICATOR BLOCKING BLANK
KEYTOP KEYTOP
Fig.
4-Keytop
Layout
for
45K301/GAA
Page 3
SECTION 582-311-500
TABLE A
OPERATIONAL CHECKS FOR THE 45K301 KEYBOARD
TEST
STEP PROCEDURE RESPONSE
1
E:9
indicator
is
on.
If
not,
depress it.
I---t------::=:-----..,=~-------+\\I/!-------------------___i
2 Depress
the
8
and
0 keys mindicator lamp lights (brightly)
and
remains
~
l'iit
3
4
5
Page 4
simultaneously
and
then
release. lighted indicating
the
loopback
test
mode
is
activated.
Depress
the
following keys while
observing lights
for
proper
indication.
(a) Depress G briefly,
(in
cluster).
Depress B release.
(b) Depress
~
fully.
Depress
CD
fully
and
release.
(c) Depress Q briefly.
Depress LINE
and
release.
INSRT
(d) Depress
[1J
briefly.
Depress
[1J
Depress
~
and
~
keys
INPUT
•
simultaneously
and
then
release.
Depress
E:9
if
not
on.
Depress
~
key
.
•
0""
Depress each key (shown
on
next
page).
Alarm sounds,
until
keys are released.
Q:]
flashes.
Q:]
on
steady and
then
off.
E:9
flashes.
e:g
on
steady and
then
off.
~flashes.
~
on
steady
and
then
off.
~flashes.
~
~
on
steady
and
then
off.
l§J
Note: Ignore
any
characters
that
may appear
on
your
screen during
test.
IT]
indicator
lamp extinguishes.
Alarm
may
sound.
Note: No
status
word
on
exit
of
test
mode.
E:9on.
~on.
l.§!j
CAPS characters displayed
on
monitor.
TEST
STEP
5
Contd
6
I 7
8
9
ISS
1,
SECTION 582-311-500
TABLE A (Contd)
OPERATIONAL CHECKS FOR THE 45K301 KEYBOARD
PROCEDURE RESPONSE
I
Lower
portion
of
depressed
I
keys
are
displayed.
I
iI2131~1516171819Iol~~1
-+-
, 7 8
IQ IwIE IR IT I
yJU
II I0 Ipi: I I * 4 5
I
r~T~"1
0 I
FIG
IH IJ IK IL I:
..
-t 1 2
, I
IzlxlclvlBINIMI~1
~1)1
-0
9 /
6 ,
3
Disengage
~
key
by
depressing
it
Alpha characters described in Step 5 are
I..oct&:
displayed in lower case (ie, abcdef, etc).
again
momentanly.
Again depress
each alpha key.
Depress
the
right B key together Upper portion
of
depressed keys are displayed.
with each nonalpha key (ie, !@*$,etc)
on
the
keyboard portion
of
the
opcon.
lil2131l15 •
71819Iol-l~
6 ,
..
,
1:1
I
I
...
'-
I:I: LIlliE 1
o Key repeats, when depressed (
1~1~1~1"'''1
EIIASt:
I"PUT
with additional force. 1
E~II
ItEPl'
-
Depress
the
left
B key together Character
on
the
upper
portion
of
depressed
key is displayed.
with one
of
the
keys depressed
in
Step
7.
With
the
LOCAL lamp lit, depress
the
The
~
lamp extinguishes each time a G
or
Wkey,
then
depress
the
E1.
key.
c::J
key
is
depressed and will remain
off
until
Continue
to
depress
the
W'
[2J
,
the
~
key
is
depressed.
(1]
,through
Wkeys
and
I
CONTROL
I
key
together
with
GJ
key
in
the
same
manner.
Page 5
SECTION 582-311-500
TEST
STEP
10
11
12
13
Page 6
TABLE A (Contd)
OPERATIONAL CHECKS
FOR
THE 45K301 KEYBOARD
PROCEDURE RESPONSE
With LOCAL lamp lit, depress
SPACE bar, with force. Repeat cursor movement
to
right.
Depress
~
FM
is displayed.
Depress B DU
is
displayed. Cursor moves home.
Depress
E(~~r
Local Indicator goes
out.
Depress E] ,
E}and
GJ
LOCAL lights. Repeated
Qs
displayed.
Depress
~,
Ej
off.
0'
Ej
on.
~,
~and
~
on,
,E:j
off.
If
there
is a printer
in
system Then = and .
~
off, E]
and
if
available.
PRINT
on.
LOCAL
If
there
is
no
printer
or
is unavailable.
~
flashes until
Ej
depressed
Turn keylock
to
off
(if present).
E:jOff.
Depress
~~~~T
and U simultaneously.
ill
lamp does
not
light.
Warning:
Do
not
depress any
key
while turning the keylock
on
or
off.
Turn keylock
on,
and depress LOCAL.
l:j
lights.
TEST
STEP
1
2
3
ISS
1,
SECTION 582-311-500
TABLE B
OPERATIONAL CHECKS
FOR
KEYBOARD
TO
MONITOR
PROCEDURE
Depress
left
ICONTROC Ikey
together
with
keys W containing
control
characters.
Depress 0 key.
Then
in sequence
L:J
depress momentarily,
with
more
force
than
normally required, each cursor
movement
key
shown.
The
left
arrow
in
the
cluster
must
be depressed 4
or
5 times as
it
is
not
repeating.
6 I
""I
1
,::.:::1
I
+11
-+-
7
* 4
8
5
2
o
RESPONSE
Test
Functions
(Local
Test
message displayed)
0-
--
--
---
-
-0-
---
- - ----9
O-+--®--1i l
:
cp
~
,
iI.-
-0---lJ.<---0--O
Note:
Attempts
to
move cursor
off
display
will result
as
shown
below.
~~----~r-----~
I
~
HOME /
POSITION
~~
-~==.=====II=J'it
r>'
n
u
Home
cursor
and
type
alpha
characters A 0
through
J.
Place cursor over
the
character
ABCDEFGHIJD
r:::l ABCD[E]FGHIJ
E
and
depress~key
momentarily;
then
ABCDDFGHIJ
depress
it
fully, releasing
it
after
characters
ABCDO
I
EFGHIJ
stop
moving. 1
r-+---------------~----------------~
4 Depress
13
key
momentarily;
then
depress
it
fully.
5 Depress
1~~NR'i-
key once.
6 Depress CINE key once;
then
depress
OLETE
B key.
ABCDOEFGHIJ
ABCDOEFGHIJ
ABCD(E)
FGHIJ
ABCDffi']GHIJ
ABCD[QjHIJ
Cursor remains in position
and
the
line
of
data
moves
down
one
line.
Cursor remains in position
and
the
line
of
data
moves up. Display
is
then
cleared
of
all
characters.
Pag~
SECTION 582-311-500
TABLE B (Contd)
OPERATIONAL CHECKS
FOR
KEYBOARD TO MONITOR
TEST
STEP PROCEDURE RESPONSE
7 Move cursor away from home position Cursor returns
to
home position (unformatted
display).
and depress
the
CURSOR
key.
TA.
Cursor advances
to
the
next,
current,
unprotected field in
the
display (formatted
display).
8 Move cursor away from home position Cursor returns
to
home position (unformatted
and depress
~
key. display).
Cursor reverses location
to
preceding
start
of
an unprotected field
on
the
display (formatted
display).
9 Move cursor away from home position Nulls are written (Displayed as Spaces) from cursor
and depress B key.
to
end
of
display
and
cursor returns
to
home
posi-
tion
(unformatted display).
Cursor advance
to
next, current, unprotected
field
on
the
display
and
replaces remainder
of
field from cursor location
with
nulls (formatted
display).
10
Home cursor and
type
alpha characters ABCDEFGHIJ when New Line depressed,
A through J. Depress
Gonce,
and
then
cursor moves
to
beginning
of
next
line.
Additional depressings cause cursor
LINE
to
move
the
next
line.
several more times.
11
Type a line
of
characters and depress Cursor returns to home position.
B and depress
T:~~~
key. Line
of
characters are cleared from display
(unformatted display).
(Test Ended)
~e
8
TEST
STEP
1
2
3
4
PF
e PF
12
TABLEC
LINE
INSERT
'-IN£
O'LETE
C.M
INSERT
CHAR
O'LETE
ISS
1,
SECTION 582-311-500
'IELD
.....
RK
DUP
BACK
TA.
OPERATIONAL CHECK FOR MAGNETIC STRIPE READER (MSR)
PROCEDURE RESPONSE
Note: These steps apply only
to
Note: MSR affects on-line operation,
keyboards equipped with a magnetic
not
off-line operation. Use
in
on-line
stripe reader (MSR). operation is system dependant.
Depress ERASE INPUT and
UNDERLINE keys together with TST indicator lights and remains on.
additional force.
Insert 406303 test card into
CAPS
LOCK indicator flashes repeatedly.
reader smoothly.
Remove test card. CAPS LOCK indicat-orstops flashing.
End test
by
depressing ERASE LOCAL indicator lights. TST indicator
INPUT and PERIOD keys together goes out.
with additional force.
Page 9
SECTION
582-311-500·.
3. TROUBLESHOOTING
3.01 Troubleshooting is based on
the
use
of
a series
of
questions
to
determine possible causes for
the
trouble, Depending on
the
response
to
the
questions, instructions are then given
to
correct
the
trouble.
3.02 To isolate a trouble
to
a specific area,
start
with
the
operational checkout procedures given in
TESTING, Table A, Page 4,
or
start with
the
following series
of
questions given in Table D.
3.03 Before attempting
to
troubleshoot
the
unit, make sure
the
trouble is
not
caused
by
interconnected
equipment.
3.04
If
a trouble is isolated
to
the
logic card,
the
troubleshooting instructions will recommend
that
the
unit be replaced.
3.05 Repair
of
the
keyboard
is
not
to
be
attempted
without proper shop facilities. Repackage
the
keyboard
to
be repaired in
the
box
of
the
replacement unit. Tag
the
unit, listing
the
found trouble.
TABLED
TROUBLESHOOTING PROCEDURES FOR KEYBOARDS
r-
__
AN
___
A_L_y_SI_S_Q_U_E_S_T_IO_N_.
__
+-
____
"y_E_~_I~~~~i~f~E
___I
1. Is LOCALlamp on?
(Depress LOCAL key.)
2. Can characters be entered
from keyboard and dis-
played correctly
on
the
screen?
3. Do
uc][!]U]BG
and
space bar.keys repeat
when lightly depressed?
(Not fully depressed
on
repeat keys.)
4. Do all repeatable char-
acter keys repeat when
fully depressed?
5. Does a character appear
on
the
s~reen
when power
is fIrst
turned
on?
(Turn power
off
then
on
again several times.)
Page
10
Go
to
2.
Go
to
3.
Check operation
of
REPT
keyswitch. Replace key-
board,
if
necessary.
Check operation
of
all
repeat keys.
Replace repeat keyswitch(s).
Replace keyboard.
Go
to
5.
Check operation
of
that
keyswitch associated
with character being dis-
played (go
to
7).
"NO"
RESPONSE
DIRECTIVE
-.----
Go
to
11.
Check terminals
1,
2, 3 and 6 at
J1
interface connector.
Replace keyboard.
Go
to
4.
Go
to
7.
Go
to
6.
I
I
6.
7.
8.
9.
10.
11.
ISS
1,
SECTION 582-311-500
TABLE D (Contd)
TROUBLESHOOTING PROCEDURES FOR KEYBOARDS
"YES"
RESPONSE
"NO"
RESPONSE
ANALYSIS QUESTION DIRECTIVE DIRECTIVE
Are any characters dis- Replace keyboard. Go
to
7.
played when key
is
not
depressed? (ie, key
touched, opcon vibrated,
or
other
keys operated.)
Do any keys fail
to
Check clearance between Go
to
8.
operate mechanically? keyboard cover and keytops
(adjust
if
necessary).
• All keys click when Replace defective keyswitch
depressed and click again
or
entire keyboard.
when released.
• Repeat
or
test keys click
a second time when fully
depressed and click again
when released slightly.
• Spacebar must
return
to
its Check spacebar mechanism
unoperated position fully and replace
any
parts
when depressed and necessary,
or
entire keyboard.
released slowly.
Do any keys fail
to
gener- Check for
short
between Go
to
9.
ate characters
to
the
keyswitch terminals.
screen? Replace keyswitch,
or
key-
board.
Replace keyboard, if any
groups
of
keys fail
to
operate
or
more
than
one
character is generated when
one key
is
depressed.
Do
any
indicators fail Go to
11.
Go
to
10.
to
light?
Does alarm sound (loud- Go
to
11.
Go
to
12.
ness controlled by
thumbwheel) when
test
mode
is
entered?
Does
the
TST lamp light Go
to
14
if
indicator failed Go
to
12.
when
test
mode
is
to
light.
entered~
Simultaneously depress
the
RETURN and PERIOD keys
fully,
to
extinguish lamp
if
no
further testing is required.
Page 11
SECTION 582-311-500
TABLE D (Contd)
TROUBLESHOOTING PROCEDURES
FOR
KEYBOARDS
"YES"
RESPONSE
"NO"
RESPONSE
ANALYSIS QUESTION DIRECTIVE DIRECTIVE
12. Is +12 V dc (pin 7) and Go
to
15.
Proper voltage
not
being
-12 V
dc
(pin
8)
present supplied
to
the
opcon:
with respect
to
frame
ground (pin 9)
on
Check 45BSE301 and its cable
connector. (Section 582-300-400).
'I
PI
000
Check power supply voltages.
000
+12VDC_~
Go
to
12
(a).
-12 V DC
J:~JD
(a) Check connector pins
of
Go
to
12
(b). Replace
453956
cable.
Jl.
(b) Check ground wires are
Try
Question 2,
if
yes, go Repair grounds.
properly placed.
to
14.
If
no,
go
to
15.
13. Does keyboard operate Keyboard
ok,
go
to
16.
Go
to
14.
in
TEST
mode
(loopback
test)?
14.
Do indicators light
in
Go
to
16.
Check indicator keyswitch,
loopback
test
mode? as
in
Question 7.
Check
"NO"
responses
of
Question
12
.
.-
15. Is +24 V dc present
at
Replace
341088
indicator Replace keyboard.
pins 3 and 4
of
indicator keyswitch
or
ill
assembly keyswitch
or
ill
indicator terminals when indicator
that
has defective
lamp should
be
lit?
346235
indicator lamp.
16.
If
keyboard has security Keyboard
ok.
Replace security keylock
keylock modification kit, modification kit.
does keyboard become
inoperative when lock
is
in
off
position?
Page
12
ISS
1,
SECTION 582-311-500
TABLEE
TROUBLESHOOTL"l'G PROCEDURES FOR MAGNET STRIPE READER (MSR)
ANALYSIS QUESTION
1. Does TST indicator
light.
2. Does
CAPS
LOCK
indicator flash with
card in place.
3. CAPS LOCK stops
flashing with card
removed.
"YES"
RESPONSE
DIRECTIVE
Go
to
2
Go
to
3
Reader ok.
"NO"
RESPONSE
DIRECTIVE
Go
to
Table D,
question 11.
Replace 406302
magnetic stripe reader
assembly. Replace
keyboard.
Replace keyboard.
Page
13
13 Pages
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