Teletype Dataspeed 40KDA101 User manual
BELL SYSTEM PRACTICES
AT&TCo Standard SECTION 582-200-212
Issue 2,
January
1979
"DATASPEED"*
40
KEYBOARD-DISPLAY AMPLIFIER (KDA) FEATURE
CONTENTS PAGE
1.
GENERAL
.....................
1
2. DESCRIPTION
..................
1
TECHNICAL DATA
..............
3
3. INSTALLATION
................
4
4. OPERATIONAL TEST
............
17
5. TROUBLE ISOLATION
...........
17
6. DISASSEMBLY/REASSEMBLY
.....
23
7. PARTS
........................
23
NUMERICAL INDEX
.............
29
1.
GENERAL
1.01
This section provides general description,
installation information, testing, trouble
isolation procedures, disassembly/reassembly and
parts identification for
the
40KDA101 Keyboard-
Display Amplifier (Fig.
1).
1.02
This section
is
reissued,
to
add
C18
to
Fig.
10
and
specify TKS107 in place
of
31246RM.
Fig.
1-40KDA101
Keyboard-Display Amplifier
*Registered Trademark
of
AT&TCo.
Note: When ordering replaceable
components,
prefix each
part
number with
the
letters
"TP"
(ie, TP405372), unless specified otherwise.
1.03 Two types
of
KDA installations, (Fig.
2)
are described in this section:
(a) Free-standing units requiring a
405982
modification kit.
(b) KDA units
mounted
in a 40CAB251/AC
cabinet requiring a 405983 modification
kit.
Support
components for use
with
the
KDA in a DATASPEED
40/4
system are
also described.
2. DESCRIPTION
2.01 The KDA allows for
the
extension
of
a
KD
(Keyboard Display) device in an
already installed system
or
may be used
to
plan
new station layouts
with
a greater KD location
flexibility.
It
is only required when a KD is
to
be
more
than
100
feet away from its controller (up
to
600
feet). However
if
desired,
the
KDA can
also
be
used when a KD
is
less
than
100
feet
from a controller.
2.02
The
KDA may be used in maxi-cluster
station arrangements where
it
is
desired
to
place
the
Device Cluster Controllers (DCC) adja-
cent
to
the
Station
Cluster Controller (SCC)
to
more closely resemble
the
station arrangement
that
this station
is
replacing
and
thus
use similar
cable runs
to
the
devices. The use
of
the
KDA in
such a case allows
the
smaller diameter cable
to
be
used. Similarly, when
the
station includes a
Mini-Cluster Controller (MCC),
the
use
of
this
smaller diameter cable may be advantageous.
2.03 The keyboard-display amplifier accepts
the
low video and half-intensity signals
from
the
40C400
type
controller. These signals
are driven
into
an Emitter Coupled Logic (ECL)
line receiver
by
the
discrete differential ampli-
fiers.
The
outputs
are standard ECL differential
signals
of
1.6
volts.
Prepared for American Telephone and. Telegraph Company
by
Teletype Corporation
©1976
and
1979
by
Teletype Corporation
All rights reserved
Printed in U.S.A.
Pagel
SECTION 582-200-212
40KDAIOl
KEYBOARD-DISPLAY AMPLIFIER
WITH
405982
MOUNTlNG KIT (F'ree Standing)
CABLING FROM
CONTROLLER
405390
(Up
to
500
Feet)
TERMINATION
BOX
KD
KEYBOARD'
DISPLAY
CABLING FROM
CONTROLLER
(Up
to
500
Feet)
KD
KEYBOARD
DISPLAY
40KDAIOl
KEYBOARD-DISPLAY AMPLIFIER WITH
405983
MOUNTING
Krr
(40CAB251/AC Cabinet)
Fig.
2-KDA
Installations
2.04 Both
the
video and
the
half-intensity
channels are amplified in
the
samemanner.
Fig. a shows
the
video amplification circuit.
2.05 The received video line signal is developed
across
the
R1 resistor. The speed-up net-
works
of
CR1-R2 and CR2-Ra apply voltages
at
the
base
of
the
Q1 and Q2 transistors. The
emitter coupling
of
transistors Q1 and Q2
make
up
a differential amplifier. Transistor Qa
is
biased
by a constant current source
of
approximately
22
ma
through resistors RIO, R11
and'
R12.
WithQa
coupled
to
Q1 and Q2,
the
outputs
of
the
quiescent coupled collectors
to
receiver
ML1
produces voltages in
the
ECL signal voltage range
for
the
monitor.
2.06 The horizontal drive input signals (Fig.
4)
from
the
controller (a 5
ma
currentloop)
terminate
at
R15, a pull-up resistor coupled
to
a
DCC
or
MCC
+5
V supply. The
input
is
applied
to
the
cathode (pin
a)
of
the
optical isolator
+'V
RI
VIDEO
ML2.
':Ole
anode (pin 2)
of
ML2
is
driven
by
a
speed-up network
of
R16-C10 from
the
DCC
or
MCC
+5
V supply. A local
+5
V supply
is
present
at
ML2 (pin 8). The
output
of
ML2 (pin
6)
is
buffered by ML4 and given
to
the
KD display
monitor
at
connector P2 (pin 10) as Transistor
Transistor Logic (TTL) signals
to
drive a KD
display monitor.
2.07 A trouble analysis lamp (L1)
is
coupled
to
buffer ML4. This lamp is
on
when
the
+5
V local supply and
the
ac voltage supply are
on. Absence
of
either .the
+5
V
or
117
V ac
. supply extinguishes
the
lamp.
2.08 The vertical synchronization channel
signals (20
ma
current loop)
to
the
cathode (pin 2)
of
optical isolator MLa (Fig. 5).
The controller
+5
V supply
is
applied
to
the
anode (pin 1)
of
MLa through resistor R17. The
output
.
of
isolator MLa coupled
to
the
base
of
transistor Q7 allows a TTL signal
of
sufficient
power
to
drive
the
remote
KD
display monitor.
RII
Fig.
a-Video
Amplification
Page 2
ISS 2, SECTION 582-200-212
Fig.
4-Horizontal
Drive Input
+!lVIN
"0"1%. "TN.
VERT.
RTN.
VERT.
"TN.
'¥'ERT.
IYNC.
V£RT.
SYNC.
UN.
+'V
Fig. 5-:-Vertical Channel Signals
2.09 The keyboard-display amplifier allows
the
SSI (Standard Serial Interface) trans-
mission signals (Fig.
6)
to
pass through untreated
from connector
P1
(pins
9,
12,
14
and
15)
to
connector P3 (pins
1,
2, 3 and 6).
2.10 The power supply (Fig. 7) consists
of
a
center-tapped transformer (T1) feeding a
full-wave bridge rectifier (D1-D4) with filtering
being done
by
capacitors C12 and C13. The three
GRD), (pin
7,
+12 V), (pin
8,
-12 V) and (pin
9,
frame ground) are used
by
the
opcon.
2.11 Technical Data
Height
....................•...
3-1/2 inches
Width
.......................
11-1/2 inches
Depth
.............•..........
5-1/2 inches
Weight
.........•....•.•.•..•....
6-1/2Ibs
Power Requirement
........•....
103-127 V ac
50/60
Hz
at
0.4 ampere
voltage regulators ML5, ML6 and ML7 provide Operating characteristics are:
all required voltages. Diodes D5 and D6 are pro-
vided
to
preventregulatorlatch-up while supplying Temperature. . . . . . . . . . . . . . .
..
400
to
110
0 F
a common lead. Connector
outputs
of
P3 (pin
4,
Humidity
•.........
2%
to
95%
noncondensing
PI
I
P3
I .
12/
ITO
(N) I <
.
9E,,--+I---------'--'----TI~
lTD (Normal) -0.5 V
to
-2
V de
15(
I ITO
(I)
I :(lTD (Inverted)
-2
V
to
-0.5 V de
~
ITe
(N)
I <ITC (Normal) -0.5 V
to
-2
V de
I~
:
ITe
(I)
:
6(ITC(Inverted)-2Vto.0.5Vdc
Leg d lTD -Information
to
Device
en : .ITC -Information
to
Controller
Fig.
6-SSI
Transmission
Page 3
SECTION 582-200-212
PG
P4
FI
Sl
Bl
405977
'--_+-+<3
T RANSFO
RMER
ASS
EM.
CONNECTS
J4
2
3
~+-+--+-_..J
WIRE COLOR
CODE
(BL)
BLUE
(R)
RED
(W)
WHITE
Input
Voltages~
103
to
127
V ac 50/60 Hz
at
O.4a approx
Output
Voltages:
+5 V dc ±10%
at
200
ma
35 mV ripple max
+12 V
dc
±10%
at
750
ma
35
mV ripple max
-12 V dc ±10%
at
750
ma
35
mV ripple max
+5V
14
OUT
12
P3
JJ
•
GRD.
I
95
14<
• +12V :
7<
•
-12V
i
8(
Fig.
7-Power
Supply
3. INSTALLATION
3.01 The procedures for installing
the
KDA
on
an in-line
run
are given as 405982 modifi-
cation
kit
installation, see 3.03. Installing a KDA
in a 40CAB251/AC cabinet
is
given
'as
405983
modification
kit
installation, see 3.04 through
3.07. Retain
the
carton
and packing materials
until a complete operational test has been per-
formed, and
the
unit
is
found
to
be
satisfactory.
Page 4
3.02 The 405982 modification
kit
consists
of
the
following:
Qty
1
1
3.03
Part No.
401628
405967
Description
Strain, relief bushing
AC
cable assembly
The 405982·modification
kit
installation
on
the
KDA requires
the
following steps:
<D
Remove two 341718
screws and 407417
cover.
® Feed 401647 receptacle
of
405967 ac cord
through mounting hole.
Connect 401648 plug
to 401647 receptacle.
Caution: Do
not
plug
ac
cord to
115 volt source until
all
other
connections
are
made.
® Remount 407417 cover
with 341718 screws.
®Plug in cables;
video
ISSl
controller
to
P1, OPCON
to
P3,
and monitor
to
P2.
ISS 2, SECTION 582-200-212
407417 COVER
® Remove 401648 plug
from mounting hole
by compressing its
mounting ears while
pushing
it
inward.
401647
401648
RECEPTACLE
PL~
@)
Squeeze 401628 strain
relief bushing around
ac cord and push
the
bushing into mounting
hole until bushing is
seated.
405372
KDA
STUB CABLE
(Controller)
OPCON/MONITOR
CABLE
401648
PLUG
oRefer
to
3.08, for connections
at
controller, and 3.09
or
3.10 for opcon/monitor.
Page 5
SECTION 582-200-212
3.04 The 405983 modification kit provides all
the
hardware and cabies
to
mouni
and
operate
the
40KDA101 in an empty
40CAB251/AC
KD
cabinet. The 405983 mod-
ification kit consists
of
the
following:
2
1
Part No.
401582
405961
® Unplug 405038
connector
of
the
405047 cable from
the
405050 ac
distribution assem-
bly as shown.
J
~
ACCORD
Description
Nut
w/lockwasher
AC
cable assembly
AC
DISTRIBUTION
ASSEMBLY
® Needle-nosed pliers should be
used
to
insert
the
three pins
of
the
405961
accable
into
the
405038 connector
of
the
405047 cable.
Insert wires
as
shown;
Black
to
4
Green
to
5
White
to
6
Check
that
pins are fully seated.
Note: The 6 hole 405038
connector
is
not
numbered,
numbers are given as references.
Page
6
. Part No. Description
1 405969 Opcon cable assembly
(12"
long)
1 405975 Monitor cable assembly
(25"
long)
2 407418 Bracket w/stud
3.05 Installation
of
the 405961
ac
cable
assembly
of
the 405983 modification
kit
requires
the
following steps:
Caution: Unplug
ac
cord from
wall receptacle.
Wire
Side
of
Plug
ISS 2, SECTION 582-200-212
3.06
Installation
of
the
405969
(opcon)
and
405975
(monitor) cable assemblies
of
the
405983
modifi-
cation
kit
requires
the
following steps:
<D
Install
405969
opcon
cable assembly in
the
front
panel
of
the
cabinet with
the
keying notches
in
the
401623
connector
facing upward.
Be
sure
to
attach
the
181392
ground strap terminal
to
the
spade terminal in
the
side
of
the
cabinet.
@ Insert
the
320420
ground terminal
exactly as shown
between
the
98642
lockwasher and
the
401110
support
guide.
405975
MONITOR
CABLE
341691
CONNECTOR
®
Remount
401110
support
guide
using 45815 lockwashers
and
85471 screws. Pull excess
cable
into
cabinet.
® Insert
the
341691
con-
nector
(405975
monitor
cable)
into
the
right
support
guide. While
holding its ears
down,
a screwdriver used for
leverage
between
the
guide and
the
connector
will ease
the
connector
into
place. Keying
notches
of
the
341691
connector
are
to
face
........
""""'::=::------98642
the
rear
of
the
cabinet.
LOCKWASHER
5 Using
312918
nylon
strap,
(not
supplied)
tie
monitor
cable
to
cabinet
tab.
Page 7
SECTION 582-200-212
3.07 Mounting
the
KDA with
the
405983 modification
kit
hardware requires
the
following steps:
(j)
Plac~
two
407418
brackets with
the
401582
nuts
loosely
in
place
in
the
third
Or
fourth
slot, from
the
front, in
the
cabinet floor
by
sliding
the
brackets
under
the
skirt.
[C'i
<'i
JJi(i
(Cabinet Lid
Not
Shown)
® Remove
two
341718
screws
and
407417
cover. 341718 SCREWS
® With
the
KDA
heat
sink facing
the
rear
of
the
cabinet,
lower
the
KDA
into
cabinet, position
bracket
studs (with
401582
nuts)
either
left
or
right
until
the
401582
nuts
protrude
from
the
keyhole
slots.
Move KDA forward until studs
touch
the
rear
of
the
slots. Tighten
both
nuts.
HEAT
SINK
KEYHOLE
SLOT
401582
NUT
(Top View
of
KDA)
@
Remount
407417
cover
with
341718
screws.
Steps ®
through
®are
on
next
page.
Page 8
@
(Wiring Not Shown)
KEYHOLE
SLOT
401582
NUT
(Right
S'd
I
eofKDA)
® Connect
40
stub
cable t
5372
KDA
b 0
tenn'
ox, see 3.08. mation
Note: Cabl
cut
short
alloe
~ay
be
tenninatl' wmg
the
I
on
box
t
p aced in
th
0 be
cabinet. e 40CAB251
ACDIST
ASSE~~LUTION
(Part Y
of
Cabinet)
Warning' M
c~nnections
(~~~
ac
cord
a,
ter all cantrall V ac)
connections. er
, Connect
4059
opcon cabl
69
ass e
emblyatP3.
ISS 2
40CAB251/AC
, SECTION 582
-200-212
.
401647
RECEPTACLE
AT
P4
5 Connect
40
ac
cable 5961
at
P4. assembly
6
~onl!-ect
405975
omtor
cable
assembly
at
P2.
Page 9
SECTION 582-200-212
3.08 Interconnection
of
40KDA101
to
MCC
or
DCC Controller
~
"
[ ,.
[
,.
[ ,.
[
,.
[
,.
[ "
INTERCONNECTION MODULE
OF
DCC
OR
MCC
[Qlo[]
IT]
[D]
1 ,
."
1 •
52
53
54
S9 NOT USED
~
S.
50
51
50
~o~ [i]
[]
Video
Connector
at
410200
Back Panel
SSII/O
PORTS
0 [J
DATASET
CONNECTOR
S5 THROUGH S8 f
NOT ON
SSI
I/O
PORTS NOT 0
4OC402
ON
40C403
(MCC) (DCC)
For
cable connections
to
MCC
or
DCC, refer
to
Section 582-200-201.
(Side
View)
SSI CONNECTOR TO
INTERCONNECTION
MODULE
VIA
VIB
V2C
V2D
(Rear
View)
ALTERED
OPCON/MONITOR
CABLES:
405301
405302
405303
405304
405139
-405140
6
FT
12
FT
25
FT
50
FT
75
FT
100
FT
TKSI07
CABLE
(See
Note)
405390 405390
'":==;;;;;;;:;-
TERMINATION TERMINATION
..
~----~
BOX
~----------r-------~~
BOX
~--------'
405372
40
KDA STUB
CABLE{6
FT)
For
installation, refer
to
3.11.
From
Controller
PI
1
00000
00000
3
00000
40KDA101
Input-Output
Connections
ToOPCON
13 P3
3n===~
15
To
Monitor
P2
~==~3
For
cable connections, refer
to:
3.07 -KDA in a 40CAB251(AC
3.09 -KDA
to
Free-Standing KD
3.10-
KDA
to
Attached
KD
Page
10
Note:
The
length
of
the
TKS107 cable plus
the
altered
opcon(monitor
cable
and
a 40KDA
stub
cable is
not
to
exceed
500
feet.
ISS 2, SECTION 582-200-212
3.09
Interconnection
of
40KDA101
to
a Free-Standing
KD
(for
connections 40KDA101
to
controller,
see 3.08).
I
/
From
Controller
P1
00000
00000
3
0000
0 15
I
./
40MN101/AA
I
/'
MONITOR
/'
;"
MONITOR
b
I.;'
CONNECTOR
t-
/
KDCABLE
V
405611
40KDA101
Input-Output
Connections
To
Opcon
P3
To Monitor
P2
~==;::=J3
KDCABLES
405374
12
FT
405376
50
FT
405378
100
FT
ACCABLE----------
\ I
~
AC
CORD
405611
40K104/DAA
OPCON
~---
401150
CONNECTOR
(Included
With Base)
-",,,"
,l~""
<D
Mount
monitor
connector.
@Mount
opcon
connector.
346333
CABLE
(Supplied With
40BSE201 Base) Cable Routing
Install
346333
cable
from
opcon
base
(40BSE201).
(In 40BSE101 Base With
Bottom
Plate Removed)
Page
11.
SECTION 582-200-212
3.10 Interconnection
of
40KDA101
to
Attached
KD
(for connections 40KDA101
to
controller,
see 3.08). 40KDA101
Input-Output Connections
/
/
From Controller
-=v=::Pl::::::.::::...
Ir
13
000
CO
b
0000011
3
0000011
15
To Opcon
P3
3n--=~
40MNI0l/AA
I
MONITOR
3598
NUT
92260
\
~
) /
U
///
320420
LOCK·
CONNECTOR
WASHER~
® Mount 407066 cable
'407066'-,..
i
clamp as shown by
A'
___
===::!=~
I'
40CAB251/ZZ +
405562
=
40CAB251/AC CABINET
Page
12
first starting
181249
' .
screw
into
weld
nut
t
from below and , ,
tightening securely. :
CD
Route
KD
cable
through rear
of
cabinet.
® Install opcon connector
of
KD cable through
front
of
cabinet (as in 3.06).
To Monitor
P2
",,===;::::!J3
Install moni-
tor
connector
ofKD
cable
making sure
that
ground
lead is placed
over 98642
lockwasher
(as in 3.66).
4 Secure
KD
cable.
3.11 Connection from
the
40C400 controller
to
the
405390
termination
box
is accom-
plished using a standard controller
to
opcon/mon-
itor
cable (Fig.
17
through
20). Customer removal
of
the
opcon
and
monitor
connectors is required.
Between termination boxes, a length
of
TKSI07
is used. This cable is
ordered
by
the
foot. A maxi-
mum
of
500
feet
is
allowed (600
feet
where slight
display degradation
is
permissible) between termi-
nation
boxes providing
that
the
cable between
the
ISS 2, SECTION 582-200-212
controller and
termination
box
is
12
feet
or
less
in length. Longer cables
may
be
used, however,
their
length
must
be subtracted from
the
maxi-
mum
allowable length
of
500
feet between termi-
nation
boxes. Connection from the
termination
box
to
the
40KDAI0l
is
made using
the
405372
cable stub. This 6
foot
cable assembly has a
connector
at
one
end
and is suitably prepared
for
insertion (requiring only skinning)
into
a
termination
box
at
the
other
end.
<D
Cut
off
the
401150
and
341691
connectors from
the
dual
cable (opcon/monitor).
341691
CONNECTOR
® Slit and remove
four
to
five inches
of
both
the
outer
jacket
and shields. Also, remove
the
two
foil
shields
of
the
video cable.
Caution:
Care
must
be used to prevent cu-tting the
outer
shield drain wires.
@ Prepare one
end
of
the
TKSI07
cable
(up
to
500
feet) in
the
same
manner
as
in
step
®.
® Remove
195272
screw
to
remove
the
cover
of
the
405390
termination
box.
® Loosen
the
two
1291
clamp screws
on
bottom.
TKS107 CABLE
7 Insert
opcon/monitor
cable
and
TKSI07
cable; allow
1/4
to
1/2
inch
of
the
outer
jackets
to
extend
past
the
clamps. .
Steps ® through @ are
on
the
following pages.
Page
13
SECTION 582-200-212
® Each
conductor
lead
must
be
cut
to
length and
1/4
inch
of
insulation skinned
off_
Note: Conductors
must
not
be
solder tinned.
@ Loosen all terminal screws (keepers raise with screws). Insert
proper
lead(s)
to
terminal(s)
and
tighten
screws.
For
BLACK
opcon/monitor
cable (see Page
15
for
grey
opcon/monitor
cable).
NUMBER
QFLEADS
COLOR
OF
LEADS
~
/
2-White-Purple
2-Purple
2-White-Black
2-Black
1-White-Brown**
1-White-Blue**
1-White-Slate**
2-Yellow
2-Red
3-Drain
(Outer
Shields)*
2-0range
2-Green
*Drain wires
to
be
suitably insulated.
**Lead terminates
in
box.
@ Tighten
1291
clamp screws.
Remount
and fasten cover.
Page
14
1291
CLAMP SCREW
-2-White-Green
-No
Connection
-No
Connection
2-Brown
2-Slate
2-Drain (Video)*
2-White
2-Blue
2-
Drain (Half
In
t.)*
1-White-Orange**
1-White-Yellow**
1-White-Red
OPCON/MONITOR
CABLE (Black)
(Cable
From
Controller)
For
GREY
opcon/monitor
cable, follow steps@)
and@.
(See Page
14
for black
opcon/monitor
cable.)
NUMBER COLOR
OF
LiADS
?EADS
l·White·Purple*
l·White·Red
l·Purple*
l·Red
1·
White·Black*
l·Green
l·Black*
l·Brown
2-Brown
and
White Red
2-Black
and
Blue
2-Slate
and
White Yellow -
l-Yellow*
I-Yellow
l·Red*
I-Red
3·Drain
(Outer
Shields)**
l-Orange*
I-Green
l-Green*
l·Orange
*From
TKS107
**Drain wires
to
be
suitably insulated.
Note: Tie
off
WoO
and
P
wires
of
SSI leg.
ISS 2, SECTION 582-200-212
l-Whitp-Green*
I-Blue
No Connection
No Connection
l-Brown*
I-Orange
l-Slate*
l-White-Orange
2-Drain (Video)**
I-White*
I-Yellow
I-Blue*'
I-White-Yellow
2-Drain (Half
Int.)**
I-Purple
I-Slate
I-Black
OPCON/MONITOR
CABLE (Grey)
(Cable
From
Controller)
Page
15
SECTION 582-200,212
@ Install
the
TKS107 cable (long run). This cable is
not
intended for rigorous pulling through conduit.
Due
to
inner shielding
i:soiaLiun
requirement~
and the very iragiie wire used in the video and hali·
intensity pairs,
it
is
recommended
that
for
conduit
runs over
100
feet,
not
more
than
25
percent
of
the
conduit
area should be used. In addition,
if
more
than
one
90
degree
bend
is encountered in
the
conduit
run
a pull
box
should be inserted.
@The
405372
stub
cable
and
the
TKS107 cable are
then
installed in
the
second termination box,
go
back
and
follow steps
CD
through@ .
NUMBER
COLOR
OF
LE~
07EADS
2-White-Purple
2-Purple
2-White-Black
2-Black
2-Yellow
2-Red
2-Drain
(Outer
Shields)*-
2-0range
2-Green
*Drain wires
to
be
suitably insulated.
405372
KDA STUB
r---------;:::~~~
1291C~AMPSCREW
-2-White-Green
2-Brown
2-Slate .
2-Drain (Video)*
2-White
2·Blue
2-Drain (HaIf
Int.)*
TKS107
@ Tighten
1291
clamp screws.
Remount
cover
and
tighten
195272
screw.
(See 3.11, step
@.)
Page
16
4. OPERATIONAL TEST
4.01 Before any testing is started
on
the
KDA,
inspect
the
unit
for loose wires, badly
worn connectorpins, visual damage, etc.
4.02 At this time take proper action
to
obtain
a release
of
the
station from service. The
station
that
has
the
keyboard-display amplifier
must be isolated from
the
rest
of
the
system
before testing
to
avoid disrupting system opera-
tion.
Testing
4.03 Testing
of
the
40KDA
is
mainly a check
of
the
KD
performance. The testing
is
referenced
to
the
Trouble Analysis (5.07)
by
trouble number.
4.04 The power check for
the
40KDA
is
as
follows:
(a) Plug in KDA ac cord
at
proper receptacle
(tum
on
set power, monitor power and
controller power).
(b) Check
that
drive lamps (red indicators -
top
of
KDA and inside monitot:) are
lighted. Trouble
No.1
and (5.07).
(c) Adjust monitor brightness control
to
desired level and check cursor (Fig. 8).
Troubles
No.2,
3 and 4 (5.07).
4.05 Perform testing,from Section 582-200-501:
(a) CHART 1 - Controller Self-Test Proce-
dures -Trouble
No.5
(5.07)
(b) CHART 2 - KD/Controller Local Test
Procedures -Trouble No. 6 (5.07).
(c) CHART 4 -
KD
Local Test Procedures
MONITOR
POWER SWITCH
Fig. 8
MONITOR
BRIGHTNESS
CONTROL
ISS 2, SECTION 582-200-212
5. TROUBLE ISOLATION
5.01 Before attempting
to
troubleshoot
the
Keyboard-Display Amplifier (KDA), make
sure
the
trouble
is
not
caused
by
interconnected
equipment (monitor, opcon
or
40C400
type
controller). This can be done
by
making
the
self
test
of
the
controller
or
by
replacing
the
monitor
or
opcon as required.
If
you
have never observed
that
the
system (with
the
KD) operates correctly
(and a cable check is indicated), also check wire
colors.
5.02
To
isolate a trouble
to
a specific compo-
nent
in
the
KDA, start with
the
testing
procedures
of
Part 4.
If
the
monitor
or
opcon
does
not
perform
the
required responses, read
the
list
of
troubles in Trouble Analysis
of
5.07.
If
any
of
the
trouble conditions match
~e
units symptoms, follow
the
Trouble
AnalySlS
Procedures step
by
step until
the
trouble condi-
tion
is
eliminated.
Caution: Do not insert,
remOl/e,
connect, or
disconnect any cabling while
ac
power is applied.
5.03 Repair
of
the
KDA
on
customer location
should be confined
to
the
replacement
of
cables, fuses
or
circuit cards. Troubles
that
are
difficult
to
analyze may require replacement
of
the
entire KDA with a1mown good unit.
5.04
If
a trouble
is
isolated
to
the
410575
card
of
the
KDA, the trouble analysis
will recommend
that
the
card
be
replaced.
5.05 There are some volt-ohmmeter checks
required in
the
Trouble Analysis Proce-
dures. A volt-ohmmeter having 20,000
OhDlS
per
volt sensitivity is recommended (KS-14510 volt-
ohmmeter
or
its equivalent). The volt-ohmmeter
must
be
set
to
the
appropriate scale
by
the
user,
before any measurement is attempted. Standard
maintenance tools (screwdriver, needle-nose pliers
and
1/4
inch
or
5/16
inch
nut
drivers), as in Sec-
tion
570-005-800, are required.
5.06 Maintenance
of
the
KDA is aided
by
a
red
indicator
lamp
at
the
top
of
its cover. This
lamp
is
lit when
the
KDA
is
in operation (pro-
ducing a
+5
V de voltage and receiving a horizon-
tal
drive signal from
the
controller).
Page
17
SECTION 582·200-212
TROUBLE ANALYSIS CHART
NO. TROUBLE
1
Red
indicator lamp (L1)
is
not
on,
with power applied.
Page
18
TROUBLE ANALYSIS PROCEDURES
a. Check 143307 fuse (F1) 0.6 amp SL·BL
if
blown.
RED
LAMP
P2
Fl
Note:
If
fuse blows again, disconnect J4·P4
connectors. Replace
the
fuse.
If
fuse blows again,
replace 405977 transformer.
If
the
fulle
blows
after
the
power is restored, replace
the
entire KDA.
b. Check ac cord continuity:
(1) In·line installations (405967 cable), dis·
connect 401648 plug from 401647
receptacle (inside KDA) and remove
the
ac
plug from
the
wall receptacle.
(2) Cabinet installations (405961 cable), dis·
connect 401647 receptacle from 401648
plug (side
of
KDA). Remove
the
ac plug
from
the
wall receptacle. Check continuity
from ac plug
to
terminals
of
401647 receptacle
(see Fig. 22). After checks are complete,
remount
the
ac cord.
c. Check ac voltage
at
401647 connector. Pin 1
(black wire)
to
pin 2 (white wire) = 103·127 V
ac
(power on).
If
not
present, replace ac cord
or
check ac wall receptacle. Restore 401647
connection.
d.
Check ac voltages
at
J4
connector (unplug
J4
from
P4,
"No
Load Condition Check", with power on);
pin 1
to
pin 2 = 21 V ac (approx),
pin 2
to
pin 3 = 21 V ac (approx), and
pin 1
to
pin 3 = 43 V ac (approx).
If
any voltage
is
not
present, replace
the
405977
transformer assembly.
NO.
1
(Cont)
2
3
TROUBLE
Dark screen
at
monitor, no
raster present (with
monitor
brightness turned
on
full).
No cursor present and/or,
no
characters displayed
(raster present).
ISS 2, SECTION 582-200-212
TROUBLE ANALYSIS CHART
TROUBLE ANALYSIS PROCEDURES
e. Remove monitor cable from
P2,
connect
J4
to
P4,
(see Fig. 22). Check voltage between P2 pin
12
(or
14)
and pin 9 (or
15),
if
+5
volts
is
not
present;
check 402202 regulator (ML5) white lead
to
red
lead (GRD) for
+5
volts.
Ml7
·12 V
(402204)
TOP
Ml5
+5V
(402202)
Mi6
+12V
(402201)
If
voltage
is
not
correct, check blue
to
red leads
for a voltage
of
greater
than
+5
volts.
If
the blue
lead voltage
is
not
greater
than
+5
volts, install
a new 410575 card.
If
blue lead voltage
is
correct
but
the white lead voltage is
not
correct, replace
the ML5 regulator (402202).
a.
If
red indicator lamp (L1) is
not
on,
go
to Trouble
No.
1.
If
KDA passes all checks
of
Trouble
No.1,
replace 410575 card.
b.
If
red indicator lamp (L1) is lighted,
but
the drive
lamp (15)
of
the
monitor
is
not
lighted, replace
410575 card.
c. Recheck monitor.
d. Recheck cables.
Ref: Horizontal Drive, P2 pins 8 and
10
(Fig. 10).
a. Replace 410575 card.
b.
Recheck monitor.
c. Recheck cables.
Ref: Video Channel, P2 pins 3 and 6 (Fig. 10).
Page
19
SECTION 582·200·212
TROUBLE ANALYSIS CHART
NO. TROUBLE TROUBLE ANALYSIS PROCEDURES
4 Display roll over
on
screen,
a.
Replace
410575
carel.
continual.
b.
Recheck monitor.
c. Recheck cables.
Ref:
VerticalSyncChannel,P2
pins 11 and
13
(Fig. 10).
5 Half·intensity
or
protected a. Replace
410575
card.
data
is
displayed
at
full
inten·
sity, all
the
time.
b.
Recheck monitor.
c. Recheck cables.
Ref: Half·Intensity Channel, P2 pins 1 and 2 (Fig. 10).
6 Any problem related
to
opcon
a. Replace opcon.
operation. b. Remove
opcon
cable from P3
at
KDA. Check for
+12 V dc between P3·7 and P3-4 (grd). Check for
·12
V dc between P3·8
and
P3-4 (grd).
If
voltages
are correct,
go
to
Trouble No. 6c.
If
+12 V is bad,
replace ML6 regulator
(402201)
or
the
410575
card.
If
·12
V
is
bad, replace ML7 regulator
(402204)
or
the
410575
card.
Note: Before making
any
continuity
checks, observe
all cables for
proper
wiring.
c. Check SSI cable
continuity
between KDA and
opcon.
d.
Check SSI cable continuity between KDA and
controller.
e. Remove all cables from KDA. Check for con·
tinuity between
the
following pins
of
the
410575
card:
Connector P1
to
Connector P3 (Fig. 23)
Pin
12
.............
Pin 1
Pin 9
.............
Pin 2
Pin
15
.............
Pin 3
Pin
14
.............
Pin 6
If
no
continuity
is
found, replace
410575
card.
7 Red indicator lamp
of
KDA a. Recheck cables.
is
on;
but
drive lamp
of
KD
monitor
is
off.
b.
See Trouble No.
1d.
and
e.
c. Recheck
monitor
(if convenient, replace monitor).
Page
20
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