Teletype Dataspeed 4500 Series Installation instructions
I BELL SYSTEM PRACTICES
AT&TCo
Standard
SECTION 582-311-700
Issue
1,
June
1980
"DATASPEED*"
4500
SERIES KEYBOARDS
DISASSEMBLY/REASSEMBLY, ADJUSTMENT, AND PARTS
CONTENTS PAGE
1.
GENERAL....................
1
TOOLS
REQUIRED.
. . . . . . . . . . . . 1
2.
DISASSEMBLy/REASSEMBLy....
2
3. ADJUSTMENT
................
.
17
COVER TO KEYTOP
ADJUSTMENT
................
.
17
4. PARTS
......................
.
18
NUMERICAL
INDEX.....
.
.....
. 27
1.
GENERAL
1.01
This section providesdisassembly/reassem-
ly, adjustment, and
parts
information
for
the
DATASPEED 4500 series keyboards as in
Fig.
1.
45K301GAA03
Keyboard
without
Magnetic Stripe Reader
45K301GAA02
Keyboard with
Magnetic Stripe Reader
Fig. I--DATASPEED 4500 Keyboards
*Registered Trademark
of
AT&TCo.
1.02
Whenever this section is reissued,
the
reason
for
reissue will
be
listed in this
paragraph.
Note: When ordering replaceable parts,
or
tools
prefix each
part
number
with
the
letters
"TP"
(ie,
TPI23456),
unless specified otherwise.
1.03
The procedures
for
keyboard removal
and
replacement are included in this section.
1.04
The
extent
of
the
disassembly procedures
is limited
to
that
which
is
required for
correction
of
troubles
or
replacement
of
parts
in field locations.
1.05
Refer
to
Maintenance Tools Section
570-005-800
for
a complete listing
of
the
various
types
of
hand
tools available for
maintenance
of
Teletype ® equipment.
TOOLS REQUIRED
1.06
The
following
tools
are recommended
for
use during
the
disassembly and reassembly
procedures:
75765
89954
100982
108285
143484
145867
346257
346260
346392
346960
402840
406303
Spring
hook
--
pull
1/4-inch
nut
driver
Screwdriver (6-inch medium)
Long-nose pliers
Grease
(I
lb. can)
or
Grease
(4
oz. tube)
Keyswitch
extractor
Key
top
extractor
Static discharge strap
Extractor
Soldering iron (low wattage)
Desolderer
Terminal extractor
tool
Test card (MSR)
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 582·311·700
2. DISASSEMBLYjREASSEMBLY
Warning:
To
avoid possible internal damage to circuitry, wear a 346392 static discharge strap connected
to ground to allow static discharge before disassembly and reassembly.
Avoid
touching circuit lands or
components
as
much
as
possible. Soldering irons, test, and insertion equipment
must
be grounded.
Attach 346392 static discharge
strap tightly
to
wrist
as
shown. Attach clip
end
of
static discharge
strap
to
frame ground.
2.01 Precautions should be
taken
to
assure
that
disassembly/reassembly
is
done
under
clean conditions.
No oil, grease,
or
other
liquids should be allowed
on
loose parts, subassemblies, keyswitches,
or
the
complete keyboard.
2.02 Reference in
the
procedures
to
left
or
right,
up
or
down, and
top
or
bottom,
etc, refer
to
the
units
normal operating position.
2.03 When removing
any
subassembly
or
part,
do
not
force
or
pry parts, unless specified,
to
provide
the
necessary clearance for removal. No forcing
is
required
to
accomplish a removal procedure. Follow
the
removal procedure
and
~ote
how each
part
is
removed and
the
sequence
of
its removal so
that
proper
~eassem?ly
can
~e
accomplIshed.
For
reassembly, reverse
the
removal procedure
except
where different
instructIons are gIven.
2.04
To
remove keyboard:
oPull keyboard forward
to
disengage from cabinet.
0----
____
6itD
Note: Use same procedures
to
remove
and
replace keyboard
from table
or
free standing base.
2.05
To
replace keyboard:
B _
oSlide
left
and
right latches down.
oSlide left and right latches
upward
into
latched position.
---
r:1
__
V -
__
LATCH
~~.
oWith right
hand
place
thumb
~
~
on
right inward latch
tab
and
9(_
~
press downward
to
unlatched
e position.
1 Place
thumb
on
left inward latch
tab
~d
press doV'mward
tounlatched
position.
2 Engage connector
and
left
and
right guides into slots.
Warning: Check that
unit
is
firmly attached
on
both sides before releasing hold.
Page 2
2.06
To
remove 347000 cover:
(j)Place keyboard upside-down
on
a smooth surface. (Avoid
scratching
or
marking
the
keytops).
®Remove
the
three fasteners, one
at
a time, by inserting a screwdriver
to
lift each fastener. Hold
the
fastener down while prying
up
from
under
the
bottom
cover.
LIP
3 Swing 347309
bottom
cover
up
and away from retaining lip
to
release pan.
FASTENERS
0Use
a
thin
bladed screwdriver
or
orange stick
and
pry
up
left
and right levers. Lift keyboard
out
of
347000 cover.
For
reassembly go
to
2.34.
ISS
1,
SECTION 582-311-700
Page 3
SECTION 582-311c700
2.07
To
remove
346958
pan:
_Remove cover (2.06).
Q) Remove
two
screws from
left
and
right side frame tabs, and lift
off
347330
bracket.
346958
PAN
For
reassembly go
to
2.34.
2.08
To
remove
left
side frame:
-Remove
cover{2.06).
-Remove
pan
(2.07).
Q)Remove
two
mounting
screws
from
left
side frame.
CD
Side frame
can
then
be eased
off
the
pan
lip.
Note:
If
keylock is present, go
to
keylock cable removal (2.15).
For
reassembly go
to
2.27.
Page 4
184056
MOUNTING
SCREW
184056
Ic
MOUNTING
~~
SC~EW
~
---:.
.
\--
346958
PAN
LIP
ISS
1,
SECTION 582-311-700
2.09
To
remove right side frame:
-Remove
cover (2.06).
Warning:
Be
careful when removing the upper mounting screw. The lockwasher and
nut
may drop
onto
the circuit card.
QRemove
upper
screw, lockwasher
and
nut.
@Remove
connector
guide.
G)Remove lower mounting screw.
0Removal
of
the
knob
may be required
before
side frame will detach.
For
reassembly go
to
2.32.
2.10
To
remove magnetic stripe reader:
UPPER MOUNTING
SCREW, LOCKWASHER
AND NUT
===;;;;;;;~=====;:::::;:;;;1rvCARD
MOUNTING
-Remove
cover (2.06).
_Remove pan (2.07).
READER
QRemove
four
reader mounting screws.
<YLift reader
out
of
frame. MOUNTING ....::::=--11+-0
SCREWS
(4)
For
reassembly go
to
2.29.
2.11
To
remove circuit card
(410097
or
410495):
-Remove
cover (2.06).
-Remove
pan
(2.07).
0Remove
six screws (four
front
and
two
rear).
@Move card
to
the
left away
from
guides
on
right bracket
rr-n
~
~
I I I I I I I I I I I I I I I I I
1
00
00
0
!gll
I
Willi
~I
II
~
0 :
~-'"
""~
:
oL..-,
'-,
.....
Top
View
For
reassembly go
to
2.28.
I
I
SCREW
CARD MOUNTING SCREW
.....
I-.-;
I I
I
II
,
,.......
....,
I I
100
CONNECTOR
GUIDES
\
q~
I I I I
II
,.-J
Page 5
SECTION 582-311-700
2.12
To
remove MOS (Metal Oxide
Semiconductor)
covers:
• Remove cover (2.06).
~
FRICTION
POST
HOLES
,_
LONG
MOS
COVER
COVER
For
reassembly go
to
2.31.
2.13
To
remove
346760
three
digit display:
Note:
Refer
to
2.22
keyswitch removal.
• Remove cover (2.06).
0Remove
solder
from
terminal pins.
Remove cover, insert spring
hook
in large hole
and
pull in direction
shown (3 places).
@ Use
346257
tool
to
extract
digit display,
or
disengage tines
with
a
thin
bladed screwdriver while lifting
the
display.
Q)Carefully guide cable
out
of
channel tines.
0Disconnect
J3
connector.
346460
CHANNEL
TINES
(Both
Sides)
RED
EDGE
THIS
SIDE
~================~-'~'"CONN"CTOR
Page 6
ISS
1,
SECTION 582-311-700
2.14
To
remove reader
and/or
keylock cable:
-Remove
cover (2.06).
0Disconnect
keylock connector.
(~')IRemove
the
five mounting screws
of
346698
bracket. Move bracket
to
the
left
to
provide clearance for removal
of
the
connector.
READER CARD
347304 CABLE
3-DIGIT DISPLAY J2 CONNECTOR
oRelease
J2
connector
from Cll'cuit card.
For
reassembly go
to
2.30.
2.15
To
remove keylock:
Remove cable
from
between
side frame
and
end
of
card.
J3
CONNECTOR
@J3
connector
(if present)
and
post
must
be
removed
to
allow
connector
to
pass
through
this area
and
under
the
cross
member.
DO NOT DISASSEMBLE
WITH KEY
IN
PhACE
0R,m"",
.....
Md
"""'~.\;>
~
/~/
LOCK
oRemove cam
and
~
switch assembly.
For
reassembly go
to
2.26.
/~/
\z,
~
~~
2 Remove hardware furnished
with
lock.
Hardware varies depending
on
lock style.
Page 7
SECTION 582·311·70Q
2.16
To
remove SSl cables:
-Remove cover
(2.06)
.
•U magnetic stripe reader is present, remove 346958 pan.
341648
TERMINAL
(9)
(2)
Remove
198670
screw from right side
of
347330
bracket. Swing bracket downward.
For
reassembly
go
to
2.33.
Page 8
0Remove
181242
mounting screw.
~Remove
320418
ground terminals.
4 Remove seven
400574
terminals.
ti
ORANGE
RED
~
• BLUE
PURPLE~
SLATE L
______
~~------------~
YELLOW
GREEN
Rear View Filter Bracket
5 Remove
401149
plug
of
453956
cable from
bracket.
To
remove terminals use a 402840
extractor tooL
@Remove
MOS
cover, insert spring hook in
large hole and pull up.
____
'lijJ"""nuv"
J1 connector
using a 346960
connector extractor.
@Remove seven 400574. terminals from
front
of
453954
filter bracket.
453955
CABLE
I
;1
ISS
1,
SECTION 582-311-700
;1
2.17
To
remove data keytops:
['1
2.18
To
remove control keytops and blocking keytops:
0Grasp
key
top
using
thumb
and index finger.
0Exert
upward force until key
top
releases.
REAR
FRONT
Caution: Control row blocking keytops are
not
the same on the front and
rear
side and must be
assem-
bled with the proper orientation. New style blocking keytop has finger-like extensions to the interior
of
the keytop to prelJent
relJersal.
2.19
To
remove the
NEW
LINE key
top
with
hous~:
NEWLINE
KEYTOP
-Remove
cover (2.06).
oRemove
key
tops
that
surround
the
NEW
LINE keytap-using346260
tool.
2 Disengage rear tine from housing
with a small screwdriver while
pulling
NEW
LINE key
top
up
and toward
the
front.
@ Continue applying upward pressure
to
the
NEW
LINE key
top
1lIld
disengage
the
front
tine from housing using a spring hook. Remove
key
top
with housing from channel.
FRQNT
TINE
(Front
View)
2:20
To
reassemble insert housing with keytop, observe position
of
locating lug
on
housing and press
into
channel. Housing must snap fully into front and rear channel tines.
Page 9
SECTION 582-311-700
Spacebar Mechanism
2.21
To
remove spacebar mechanism:
• Remove cover (2.06).
SPACEBAR BUMPER
SPRING
HOOK
1 Disengage leaf spring (bronze colored) from wire bail using a spring
hook
and
pull toward the front.
CHANNEL
~
7~H~
(Rear
View)
oDisengage
two
rear tines (one
at
each end
of
spacebar) with a small screw-
driver while pulling
the
spacebar
up
and toward
the
front.
G)Continue applying upward pressure
to
spacebar
and
disengage
two
front
tines.
4
Remnvewirebail
fromJeft
andri~ht
spacebar guides (snaps in
and
out).
SNAP DETENT
2.22
To
reassemble spacebar mechanism, make sure
the
four tines engage
the
notches in spacebar hous-
ing
and
leaf spring
is
engaged
to
wire bail.
2.23 Check mechanical operation
of
spacebar
so
that
it
returns
to
its unoperated position freely when
depressed
and
released slowly.
Page
10
ISS
1,
SECTION 582-311-700
Keyswitches
and
341088 Test Indicator Assembly
2.24
To
remove keyswitches
and
341088
test
indicator assembly:
eRemove cover (2.06).
eRemove pan (2.07). . .
eRemove key
top
if keyswitch
is
being removed (2.17),
or
unsnap
test
mdlCator cap.
oRemove solder from around terminal pins
of
keyswitch
or
test
indicator
to
he
rem"",d.
~
---Ai
A
~SOLDER
REMOVED
Warning:
Use
agrounded,
low
wattage soldering
iron
(avoid
prolonged
contact
with
pins)
along
with
a
desoldering
tool
to
prevent
damage
to
keyswitch card
circuits
and components.
Q)Place 346257
tool
over keyswitch
or
test
indicator
and
press downward.
When tool
bottoms
and embossed projections snap
into
notches
on
housing, squeeze and pull back
on
tool
to
lift
keyswitch
or
test
indicator out.
c;-u~
LOCATING
LUG
HOUSING
Note:
The tines
of
the
tool
must
pass between keyswitch
or
test
indicator housing and inside
of
channel tines.
2.25
To
reassemble, insert new keyswitch
or
test
indicator, observe position
of
locating lug (on key-
switch only),
and
press
into
channel. Housing
must
snap fully
into
front
and
rear channel tines.
Hold keyswitch
or
test
indicator in place
and
resolder.
Page 11
SECTION
582·311·700
REASSEMBLY
2.26
Assemble
keyboard
lock:
=
~====od
//'
"
184067
SCREW
W/LOCKWASHER
(!)Assemble
347301
isolator sleeve
and
bracket
with switch assembly
to
the
side frame
and
secure with
the
184067
screw.
~
454205
LOCK
"rQn
2 Assemble
the
347302
cam
to
454205
lock
with
high
part
of
cam
toward
the
switch.
3 Secure with
nut
and
lockwasher
or
screw
with
lockwasher,
whichever is supplied.
0The
lock
should be assembled in
the
sleeve so
that
in
the
"off"
position
the
key
is inserted with
notched,
or
bitted
side
up.
12
O'CLOCK POSITION
OF
KEY
SLOT
(Other
side)
Cam Position With
Respect
to
Key
Slot
@Tighten
switch assembly
mounting
screws.
Page
12
HIGH
PART
OF
CAM
ISS
1,
SECTION
582-311-700
2.27 Replacement
of
left
side frame:
CD
Position side frame with guide
over lip
on
pan. -
__________
_
0Secure
with
two
mounting
screws.~----
.
~
0:
1)""'""-
PAN LIP
2.28
Circuit card replacement
(410097
or
410495):
CDPosition circuit card
into
frame
and
against
the
guides
on
the
right side bracket.
@Replace
six
mounting
screws (four
front
and
two
rear).
CONNECTOR
GUIDES
\
,-'
'-
·4
I I I I I I I I I I I I I I I
II
I I I
II
I I I I
o
100
00
I .1
...
'0;.;;0""",==..Jt
!gllllt:,:,~,]llilllll
o
2.29
Magnetic stripe reader replacement:
0Position
reader
and
secure with
four
mounting
screws.
@Attach
connector
to
card, position
card
and
secure
with
two
mounting
screws
to
base
of
reader.
,....
Top
View
===;;;;;:;~====::::;;:;::;::;IIVCARD
MOUNTING
SCREW
READER
MOUNTING
"";:::'~-iK::!
SCREWS
(4)
CARD MOUNTING SCREW
Page
13
SECTION 582-311-700
2.30 Installing 347305 jumper cable:
6)Remove five mounting screws, two front, one
at
crossmember and two rear, move cross-
member
to
the
left
to
provide clearance for
oRoute jumper cable
behind 3-digit display
connector, when present.
jumper cable co:nnlector.,
(Top
View)
3-DIGIT DISPLAY
(Optional)
3-DIGIT DISPLA
CONNECTOR
(Optional)
@ Connect keylock cable
to
J4
of
jumper cable.
2.?1 Installing
MOS
covers:
I~
Page
14
Route
347305 jumper cable
between moved subassembly
and end
of
circuit cards.
6)
Install large
MOS
cover
so
that
projection bears
against upper row
of
....a:::L
keyswitches\
FRICTION
POST HOLES
(3)
(Top
View)
0Removal
of
friction post may be
required
to
route jumper cable
connector under frame
(9(:';ol1me'~t
J2
of
jumber cable.
~
Install short
MOS
cover
so
that
tab
engages hole
m side frame.
o
ISS
1,
SECTION 582-311-700
2.32 Replacement
of
right
side frame:
Warning:
Be careful when replacing the upper mounting screw. The lockwasher and
nut
may drop onto
the circuit
card.
oReposition right side frame
onto
keyboard. Secure
with
lower
mounting screw.
2.33
Replacement
of
SSI cable:
oInsert
J1
connector
into circuit card.
<D
Replace MOS cover
(See 2.31).
oReposition
347330
bracket. Secure with
198670
screw.
0Replace
401149
plug.
Jl
<D
Replace
upper
mounting screw,
lockwasher
and
nut.
4 Slide volume
knob
onto
shaft.
1 Replace seven terminals
to
front
of
453954
filter
bracket.
6 Position ground terminals
and
secure
with
151722
screw.
141+1---"\5
Replace seven terminals
at
rear
of
453954
filter
bracket.
£fE
ORANGERED
~
?
BLUE
PURPLE
.~
SLATE
~
____
~~~~
__________
-J
¥ELLOW
GREEN
Rear View Filter Bracket
Page
15
SECTION 582-311-700
2.34
Replacement
of
covers:
oCheck position
of
side
frame
and
mounting
screws.
oPosition cover
onto
keyboard.
Place
keyboard
upside
down.
®Swing left
and
right cover
latching lever
downward
to
engage posts
on
cover.
@Reposition
bottom
cover over
front
lip.
347330
BRACKET
453952
COVER
PLATE 2 Replace these seven
screws, rear cover
plate
and
metal
pan.
3 Replace
two
screws
and
bracket.
LEVER
POST
(VReinsert
three
453959
fasteners
by
pressing
into
position.
Page
16
ISS
1,
SECTION 582-311-700
3.
ADJUSTMENT
3.01
The
clearance between
the
cover
and
key
top
is
the
only adjustment provided
on
the
KD.
Normally,
readjustment is
not
necessary unless
the
cover is replaced
or
if
there
is
an
interference between a
key
top
and
the
cover.
COVER TO KEYTOP ADJUSTMENT
Requirement
Gap, approximately equal
in
four
places shown.
@>
f=1
=;====r===r=="f"="T"'==r==""I-=;==-r='F....".,.-=r===F""T=;'.....,.-T'TII~11i"""11
=;====;=........,
.....
d:1
~
I I I I I I 1 1 1 1 1 I 1
I I I I I
II
II
J I 1
I I
III
I I I I I I I I I I
J J
.L
1 1 1 1 1 1 1 1 I I I
u U I 1
JI
II
To Adjust
• Remove cover (2.09).
Loosen
two
184056
mounting screws friction
tight
on
both
sides
of
opcon.
MOUNTING
SCREW
KEYBOkRD
ASSEMBLY
I I I I I
Insert screwdriver blade
into
adjusting
slot
and
move keyboard assembly forward
or
to
the
rear
to
gain gap clearance.
Tighten screws, replace cover and
check
gaps.
Note:
If
gaps required are
not
approximately
equal
after
reassembly, remove cover and
repeat
adjustment
procedures.
GA
@)
~
Page
17
~ECTION
582-311-700
4. PARTS
oNot
part
of410097
circuit card.
Page
18
c
Fig.
2-410097
Console
Logic
Circuit Card Components
for40K301
\
346975
••
219\
__
~_®
359S-(i)
347294--'
..
181241
---
l~..:::----------------"----~-
..
181241 I
,...,
""i
",
4{
I
"~'.
1
• I
\
'\
'-,:
Ref
1'1
453953 I I
I I
I I
~~,
'.-
S
,
:
I
I
I
~
453959/
Fig.
3-Pans
and Covers
ISS
1,
SECTION 582-311-700
o"
""
""
Ref~
~O1l38_
•
" .
"
'0
Page
19
SECTION
181241
~
,
,
Page 20
582~811-700
Ref
346956
\
F'
Ig,
4-Left
Side Components
Ref
346698
Other manuals for Dataspeed 4500 Series
1
This manual suits for next models
2
Other Teletype Keyboard manuals
