Tektronix SC 501 User Manual

SERVICES
AVAILABLE
d. Set
the following controls on
the
SC
501
.
Tektronix, Inc.,
provides complete
instrument repair
and
calibration at
local
Field Service Centers and at the
Factory
Service Center.
Contact
your local Tektronix
Field
Office
or
representative
for further
information.
NOTE
The test
equipment
end accessories required
for
complete calibration
of
the
SC 501
are listed
under
Test
Equipment
Required.
Do
not proceed
with
VERTICAL
or HORIZONTAL
adjustments
unless
the
checks
and
procedures
for
the POWE
R
SUPPL
Y
& CRT
ADJUSTMENTS
have
been performed. The
performance of
this instrument
can
be
checked at
any
temperature
within the
0°C
to +S0°C
range.
Make
any adjustment at a
temperature
of
+26^
C,
±5°C,
WARNING
Dangerous
potentials exist at
several points through-
out
this
instrument.
When the instrument is
operated
with
the covers
removed, do not touch
exposed
connections or
components. Disconnect
power before
cleaning
the instrument
or
replacing
parts.
PRELIMINARY
PROCEDURE
a. Check
that correct
nominal line selector block ha:
been
installed on the
line selector pins on the
Powe
Module
and that
the regulating range selected
includes th<
input
line voltage. See
Installation section of
Power Modul«
instruction
manual.
b. Remove
the
SC 501
side
covers and connect
th(
SC
501 to the
Power Module using
the
plug-in extender.
c. Connect
the Power Module to the
variable autotrans
former and
autotransformer
to
input line
voltage.
Se
autotransformer
to
nominal line voltage and apply
power t<
the
SC
501 .
INTENSITY
FOCUS
POSITION
(Vertical)
POSITION
(Horizontal)
VARIABLE
(Vertical)
VARIABLE
(Time
base)
LEVEL/SLOPE
Trigger Source
Pushbuttons
Fully counterclockwise
(ccw).
Midrange
Midrange
Midrange
Fully
clockwise
(c>w)
(XI)
Fully
clockwise
(ow) (XI)
AUTO
(Centered
and
pulled
OUT)
INT
ALL OUT,
except
ushed
in.
POWER
SUPPLY & CRT
1
.
Power
Supply Checks
Connect
the
precision
dc
voltmetf
between each
voltage
test point an
ground. Check;
that each supply
^withi
the tolerance liisted below.
Supply
Tolerance
+20
V
+
19.9
V to
+30.1
V
-20
V
-19.6
V to
-20.4
V
+8
V
+7.9
V
to +8.5
V
-8
V
-7.8
V to
-8.6
V
+65
V
+60
V
to +70
V
-980
V
-950 V to -1010 V
2.
+20
V
Adjustment
R500
Connect
the nrecision
dc
yoltmett
between the
+20
V
test
point
an
ground. Adjusit R500 (+20 V
ADJ)
for
reading of exactly +20 volts.
3.
Regulation
With the
dc
voltmeter on the
—980
'
test
point, adjust Variable
Autotran:
former
output
voltage from
the
low
limi
to
the
high Himit
as
indicated
in
th
Power Module: instruction manual.
Te:
point
reading should
not
vary
more
tha
±10
V- Return
Variable
Autotransforme
to
nominal line voltage
setting.
4. CRT Bias
Adjustment
R425
With the INTENSITY
control
se
fully ccw and! no test
equipment
cor
nected
to the SC 501
,
adjust
R42
(Bias!
until trace just disappears.
If
trac
is
rrot
visible^
adjust R425
until
trac
appears and readjust
R425
urjtil
trac
just
disappears
5.
Trace Rotation
Adjustment R415
Adjust INTENSITY
cw
for
visible
trace,
FOCUS
for best
trace,
horizontal
position for
centered trace.
Adjust R415
for
straight line
trace. Adjust
vertical
position control to
set trace top
to
bottom of
graticule.
It
may be
necessary
to
readjust
R415
so
that
trace
will
be
a
best
straight line
compromise
at
any
vertical position.
VERTICAL
SYSTEM
NOTE
Refer
to
POWER
SUPPLY &
CRT
(steps
1-5) before
performing any
vertical
system
adjustments. Be
certain that
the
power
supply and
crt voltages
are
within
their listed
tolerance and
that
all
controls on
the
SC 601 have
been sat
to
their
preliminary settings.
6.
Vertical
Balance R142
Set vertical
deflection factor to
10
mV/div,
AC
COUPL in,
and
center
the trace
with POSITION
controls.
No
input
signal applied. Rotate
vertical
VARIABLE from XI
to
X10
and note
the position of the trace at X10
setting.
Return vertical VARIABLE
to XI
position.
Adjust R142
(Bal)
to set
trace
to same
position
as
the
VARIABLE
X10
setting.
Repeat the above
procedure
until there
is
one-half minor division or
less of
trace
shift when rotating
vertical
VARIABLE over
its
entire
range. Reset
vertical
VARIABLE to XI position.
FIEV.
B.
AUG
1974

Tektronix SC 501 Specifications

General

Brand	Tektronix
Model	SC 501
Category	Test Equipment
Language	English