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Teletype Dataspeed 4500 Series Installation instructions

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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