Tektronix 5000 Series User Manual

4054 DISPLAY CONTROLLER MODIFICATION # 39763 CORRECTION
Please refer to March 21 , 1980 Issue 10-6 page 22 Wizards Workshop . In
the article , " 4054 DISPLAY CONTROLLER MODIFICATION # 39763 " , it states
that the Display Controller part number will go from a 670-5672-00 to
670-5672-01 . This statement is incorrect , the board level should change
from a 670-5672-01 to a 670-5672-02 level after MOD # 39763 is implemented .
--Darrell McGiverin
63/503
,
ext . 3786
4054
OPT
. 30
VECTOR
GENERATOR
&
DISPLAY
CONTROLLER
INTERACTING
PROBLEM
There
have
been
two
cases
of
4054's
(
with
Option
30
installed
)
demonstrating
an
undesirable
problem
when
operating
in a
refresh mode
.
The
symptom of
this problem occurs as follows .
The
4054
may
draw
some
unwanted
vectors
and hang busy .
In
addition ,
when
the machine
hangs
busy ,
the Z
axis
may re
main
on ,
causing
the
CRT
to
be
damaged
.
This
problem
is
caused
by
interaction
between
the Vector
Generator
(
670-5666-01 )
and
Display
Controller
,
(
670-5672-02
) ,
and
is
only
apparent
with
Option
30
installed .
To date
there is
no
defined
solution
,
other
than
changing
either
one
or
both
of
the
boards .
C
The
source
of the
problem
has
been
identified
and
as soon
as
a
modification
is
completed it
will
be
documented in
the Wizards
Workshop
.
--Darrell
McGiverin
63/503
,
ext .
3786
CLUTCH AND
CONTROL
BOARD
MODIFICATIONS
# 37349 ,
40065
4631 / 32 / 33A / 34 :
AND 40750
4633A
To use
the
available
105-0519-00
drive
roller
clutches
in
the
4633A
Continuous Recorder , the clutches were screened for a low pull - in voltage .
Those
meeting
the
requirements
were
part
numbered
105-0519-01
and used in
the 4633A . The continuous duty cycle , however , raised the possibility of
the
clutch
coil
overheating .
To
correct
this , MOD
37349 has
been
implemented .
The internal resistance
of the
coils
in
both the
105-0519-00 and
105-0520-00 has
been increased
from
near 90
ohms
to
about 145
ohms . The
new part
numbers
are
105-0519-02
for the
drive
roller
clutch
( L1020
) and
105-0520-01 for
the
cutter
clutch
( L1022 ) .
In
addition ,
Ri on
the
4633A
control
board had
been
changed
from 471
to
2782.
This increased
the
voltage
applied
across the
drive roller
solenoid ,
L1020 .
It
also
rolled the
control
board
part number
from
670-4599-06 to
670-4599-07 .
It was
found
that low -
line
conditions could
still
cause the
drive roller clutch flapper to fail to pull in .
( continued on the following page ) -30
June 27 ,
1980
Issue
10-13

Tektronix 5000 Series Specifications

General

Brand	Tektronix
Model	5000 Series
Category	Test Equipment
Language	English