sion
to
the
current
level
wi
II
be
required.
Time
and
parts for this conversion may
be
charged
to Code
32.
B/M 1280498
includes
the
following parts:
Ref.
Part
No.
Description
1
1164310
Pu
lIey,
Ti
It
2
1128455
Stud,
Ti
It
Pu
lIey{redesigned}
3 1164099
Washer,
Fe
It
4 1164158
Washer,
Spacer
When orderi
ng
the
above
bi
II
of
materi a I,
it
wi
II
be
necessary
to
order
a new ti
It
tape
to be used in
con-
junction
with
the
above
bi II. The new ti
It
tape
part
numbers
are
as follows:
Figure
16.0
Ref.
5
5
Part
No.
1164314
1164316
4
__
....
l1li
Description
Tape,
11" Printers
Tape,
15" Printers
5
Installation:
Since
the
new
pulley
is
heavier,
it
may
be necessary to use two
spacer
washers to provide
suf-
ficient
clearance
between
the
pulley
and
the
yoke in
tilt
3
position.
The mounting stud should be
lubricated
with
IBM
#23
grease
and
the
felt
washer
kept
dry.
The purpose of this
washer
is
to
keep
erasures
out
of
the
pivot
bushing.
MECHANICAL
KEYBOARD
LOCKUP
17.0
Mechanical
Keyboard Lockup
17.1 The most common causes for Keyboard Lockup
are:
a.
The
Cycle
Clutch
Latch Link Pawl
doesn't
clear
the
keeper
with
an
interposer
latched
down.
(Section
1O.0).
b.
Fi
Iter shaft timing
adjustment.
c.
Cyc
Ie
shaft overthrow adjustment (Adjustment
4.5).
17.2
d.
Latch motion
restricted
by restori
ng
ro
lIer .
{Section
15.0}.
e.
Cycle
clutch
adjustments -
latch
binding (Section
15.0).
f.
Character
interrupter
adjustment.
Old
Style
-
See
Ref.
Man.
New
Style
-
See
17.2:
g.
The Linelock Interposer binds in
the
Selector
Compensator {clean
and
lubricate}.
KEYBOARD
LOCKUP
Keyboard lockup
wi
II
resu
It
from
excessive
overlap
of
the
cycle
clutch
pawl stop on
the
cycle
clutch
pawl.
All
SELECTRIC
I/O
Printers should be
checked
using a new
specification
of
1/3
to
1/2
overlap
of
the
pawl stop on
the
cycle
clutch
pawl {see
illustra-
tion}.
Be
sure
to
maintain
the
.010"
to
.020"
verti-
cal
adjustment.
Cycle
Clutch
Pawl
.010"
To
.020"
Pawl Stop
-Figure
17.0
TRANSMIT
ERRORS
18.0
Transmit Errors
18.1
S.H.
TRANSMIT CONTACTS
The transmit
contacts
may be
dirty.
Clean
with
IBM
contact
cleaning
fluid,
then
wipe
dry with
clean
bond
paper.
18.2
The transmit
contact
air
gaps should
be
.020".
-
18.3
The C 1
and
C2
contacts
must
not
bri dge
{N/O
and
N/C
make
at
the
same
time.}
For
Cl
and
C2 timing
see
the
applicable
systems
Reference
Manual.
18.4
PRINT
SELECTION CONTACT ACTUATORS
If
the
contact
actuators
bind,
they
should be
replaced
with
the
new
style.
The
material
used in
manufact-
uring
the
contact
actuators
has
been
changed
from
a
clear
translucent
nylon to a
cloudy,
yellowish,
fiber
nylon.
The finish
of
the
actuator
plates
has
been
changed
from
nickel
to
chrome to provide more
reliable
operation
of
the
actuators.
When
replacing
an
old
style
actuator
with
a new
style
actuator,
the
actuator
plate
must ALSO
be
changed.
Only' new
style
actuator
plates
are
available
for
field
replace-
ment.
All
part
numbers remain
the
same.
4-25
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