Tektronix SC 501 Instruction Manual

INSTRUCTION
MANUAL
Tektronix,
Inc.
P.O.
Box 500
Beaverton, Oregon 97005
070-1700-00
First Printing APR 1974
sc
501
TABLE
OF
CONTENTS
Page
SECTION 1
OPERATING INSTRUCTIONS
Introduction
Description
1-1
Installation and Removal
1-1
Controls
& Connectors
1-2
Operating Considerations
1-3
Deflection Factors
1-3
Applying Signals
1-3
Input
Coupling
1-3
Sweep
Triggering
1-3
Rear Interface
1-4
Table
1-1
Rear Connector Pin Assignments
1-4
Input
Assignments
1-4
Output Assignments
1-5
Electrical Characteristics
1-5
Table
1-2
Vertical Deflection
System
1-5
Table
1-3
Horizontal Deflection System
1-6
Table
1-4
Triggering
1-6
Table
1-5
Display
1-7
Table
1-6
Environmental
1-7
SECTION
2 SERVICING
INFORMATION
Introduction
2-1
Contents
2-1
Maintenance
2-1
Cathode-Ray Tube
Replacement
2-1
Test Equipment Required
2-2
Diagrams and Parts Lists
2-3
Electrical Parts List
2-4
Calibration
Adjustments
Component Locations (reverse side of foldout)
Block Diagram
Input &
Vertical
Amplifier
(Circuit Description)
Sweep
&
Horizontal Amplifier (Circuit Description)
Z-Axis & CRT Circuit (Circuit Description)
Low Voltage Supplies
(Circuit Description)
Mechanical
Parts List
Fig. 1 Exploded
View
Fig. 2 Accessories &
Repackaging
CHANGE
INFORMATION
sc
501
Section 1—SC 501
OPERATING
INSTRUCTIONS
INTRODUCTION
DESCRIPTION
The SC
501
general
purpose oscilloscop)e is
designed
to
operate
in
a
TM 500
Series Power
Module. The
SC
501 has
a
bandwidth of
at
least
5
MHz
and
a
calibrated
vertical
deflection range
from
10 mV/DIV
to
1 V/DIV,
selectable
in
decade steps.
An uncalibrated
VARIABLE control
extends
this
range
to at
least 10
volts/division.
Calibrated sweep
rates are selected by
pushbutton-
controlled
logic in decade steps
from
1
ms/DIV
to
lOOms/DIV
(millisecond
range)
and
in decade steps
from
1
ms/DIV
to 100 ms/DIV
(microsecond
range). A
VARIABLE
control
extends
the
slowest calibrated sweep
rate
to
at
least 1
second/division and
a
X5
Magnifier
extends
the fastest
calibrated
sweep
rate
to
at
least
200
nanoseconds/division.
The
triggering circuits
allow stable
triggering from either
internal or external sources. An AUTO
triggering mode and
manual LEVEL/SLOPE
selection
is
combined in
a
single
control. With no
input signal,
automatic
triggering provides
a
bright baseline
at
all
sweep rates.
An internal switch
converts the
horizontal deflection
system
of the
SC
501 to
an External Horizontal
Amplifier
mode
of operation.
INSTALLATION AND
REMOVAL
The
SC
501
is calibrated and ready
for use as
received.
Referring to
Fig. 1-1,
install the
SC
501
and turn on
the
Power
Module. Check
that the POWER
indicator on
the
SC
501 front panel comes
on.
NOTE
It
is
recommended
that the
Power Module be
turned
off before
inserting or removing
the
SC
501. Arcing
at
the
rear connector terminals
can reduce
connector
life. However,
no internal
damage will
result
if
the
SC
501 is
inserted in
a
live Power
Module.
Refer
to
CONTROLS &
CONNECTORS
(Fig.
1-2)
for
description
of front panel
controls, connectors
and
indicators.
©
1-1
Operating
Instructions—
SC 501
CONTROLS &
CONNECTORS
NOTE
Switch
for
Y-T
or
X-Y
operation located inter-
nally; right
side,
lower cen-
ter of instrument.
Vertical
Input Connector.
BNC connector for
vertical
amplifier signal
input.
VARIABLE
Control
Extends
each
calibrated
vertical
deflection factors
over
a 10:1
range. Maxi-
mum
at
least
10 V/Dhr.
Trigger Controls.
LEVEUSLOPE
selection
from
INT or EXT
sources.
Pull
LEVEL/SLOPE
con-
trol
out
for
AUTO
trig-
gering mode.
Sweep
VARIABLE
and
X5
Mag.
Variable controls
extends
each calibrated
sweep
rate
over
a
10:1 range.
Slowest
sweep rata
1
sac/Oiv.
Pull
variable
out
for
X5
magni-
fication of each
calibrated
sweep
rata. Fastest
cali-
brate
sweep rate
at least
200
ns/Div.
SC 501
OSCILLOSCOPE
p
;
!
I
i
t
1
1
i
!
"-ImTUISI
Jl
TY
EXT
HORIZ
pin
jack.
Operates
in
conjunction
with
internal
swit^ to
al-
low
X-Y
operation.
Range
EXT TRIG
pin
jack.
Allows
sweep
triggering
from
external
sources.
Tima/Div
button.
A
push-push switch
to
al-
low
selection of a
milli-
second or
microsecond
range
for the
calibrated
Time/Oiv settings.
FOCUS
Control
Provides
adjustment to
obtain
a
well-defined
dis-
play.
INTENSITY
Control.
Controls
display
brightness.
POSITION Control.
Positions
display vertically.
Volts/Div
Pushbuttons.
Two
self-canceling switches
select the
calibrated deflec-
tion factors as
indicated.
T o
return
to
the
10 mV/Oiv
setting, depress
the unused
pushbutton
just
enough
to
release the other
pushbutton.
POSITION
Control.
Positions
display
horizon-
tally.
Time/Div Pushbuttons.
Two
self-canceling
switches
select the calibrated
sweep
rates as
indicated.
Ground Connector.
Chassis
return connector
for signals.
Fig.
1-2.
CONTROLS
&
CONNECTORS.
Operating
Instructions—SC 501
OPERATING
CONSIDERATIONS
DEFLECTION FACTORS
The
amount of
vertical
deflection
produced
by
a
signal is
determined
by the signal amplitude,
the attenuation factor
(if
any)
of the probe, the setting of the
Volts/Div
pushbuttons,
and
the setting
of
the associated
VARIABLE
control.
Use
the
largest deflection factor
.(1
V/DIV)
when first
connecting
the
SC
501 to an
unknown voltage source.
If
the
deflection is too
small
to
make the measurement,
switch
to a
lower
deflection factor.
The
deflection factors
indicated
by the
Volts/Div push-
buttons
are calibrated
only when the
VARIABLE
control is
rotated
fully clockwise.
The range
of the VARIABLE
control is
at
least 10:1.
It
provides
uncalibrated
deflection factors covering the full
range
between
the fixed settings of Volts/Div pushbuttons.
The
VARIABLE
control extends the maximum deflection
factor to at
least 1
0
volts/division.
APPLYING SIGNALS
While most
connections
to
the
SC
501
will probably be
made
using coaxial
cables, probes offer
another convenient
method
of
applying a'
signal
to
the input of the
SC
501.
Tektronix
probes are
shielded
to
prevent
pickup
of
electro-
static
interference.
A 10X
attenuator
probe offers a
high
input
impredance and
allows the circuit under test to
perform
very close to
normal operating conditions. The
SC
501
is
compatible with probes
such as Tektronix P6006
and
P6028
Passive
Probes. When probe
attenuation is not
desired,
a
Tektronix P6011
Passive Probe
is recommended.
NOTE
Probe
compensation should be
checked with a
known
signal
(risetime of 700
nanoseconds or
less) before
using
the
SC
501.
Input
time constant is
normalized
for
each
attenuator step.
Unshielded test leads
can sometimes
be used to
connect
a
signal
source
to
the
SC
501,
particularly
when
a
high-level,
low-frequency signal is monitored at a
low
impedance
point. However, when any
of these
factors are missing, it
becomes
increasingly important to use
shielded cables. In
all cases, the signal
transporting leads should
be kept as
short
as
practical.
Be
certain that
a
common ground
connection is established
between the device under test
and
the
SC
501
.
The shield of a
coaxial cable or ground strap of
a
signal
probe
provides
an adequate
common
ground
connection.
INPUT COUPLING
The
AC COUPL
pushbutton switch allows
a
choice of
input coupling. The type of
display desired
determines the
method of coupling used.
Dc
coupling
(button out)
can be used for most
applica-
tions. However,
if
the dc compronent of
the applied
signal
is
much larger than the
ac
component, ac
coupling (button in)
will probably provide
a
better display.
Dc
coupling
should
be used to
display an
ac
signal below
ebout 3
hertz.
In
the
ac
coupling position, the dc
component
is blocked
by a
series capacitor
in the input circuit. The
low-frequency
response in the
ac
position is about
3 hertz
(—3
dB
point);
therefore, some
low-frequency attenuation
and
phase shift
can
be
expected
near this
frequency limit. Distortion
will
also appear
in square waves that
have
low-frequency
components.
SWEEP TRIGGERING
When the source
switch isinthe I NT
position,
the
sweep
is triggered by a
sample of the
signal applied to
the VERT
INPUT connector.
The display
is stable
for either Normal
or AUTO
triggering modes
as
long as
the signal frequency
is
above 10 Hz. Below
10 Hz, it may be
desirable
to
use
Normal mode
triggering (LEVEL/SLOPE
control
pushed
in). The
AUTO
triggering mode
(LEVEL/SLOPE
control
pulled
out)
reduces operator
adjustments
and provides a
bright
baseline in the absence
of an input
signal.
When
the
source
switch
is
in the
EXT
position,
the
sweep is
triggered
by
the
signal
applied
to
the
EXT
TRIG
pin jack.
The
signal applied
to
the
EXT
TRIG pin jack must
be
time-related
to
the signal appliedtothe
VERT
INPUT
connector in order
to
prevent drift in the display.
Operating
Instructions—SC
501
REAR INTERFACE
TABLE
1-1
REAR
CONNECTOR
PIN
ASSIGNMENTS
(REAR
VIEW)
Pin No.
Left (B)
Right
(A)
28 Unassigned
Unassigned
27
*
-t-
Gate
Out
‘EXT TRIG signal
26 Unassigned
EXT TRIG common
23-25
Unassigned
Unassigned
22
Unassigned
Unassigned
18-21
Unassigned
Unassigned
17
‘VERT INPUT
signal
EXT HORIZ common
16
‘VERT INPUT common
‘EXT
HORIZ signal
14
Unassigned
Unassigned
15 Unassigned
Ramp Out
13
Not used
Not used
12 +33.5
V
Filtered
dc
+33.5
V Filtered dc
11
Collector PNP Series-Pass
Transistor
Base
PNP
Series-Pass Transistor
10
Not used
Emitter
PNP
Series-Pass Transistor
9 ±33.5
Vdc common
±33.5
Vdc common
8 —33.5
V
Filtered
dc
—33.5
V Filtered
dc
7
Collector NPN
Series-Pass
Transistor
Emitter NPN Series-Pass Transistor
-6
No Connection
Base
NPN Series-Pass Transistor
1-5
Not used
Not used
*
Instrument not supplied
with these connections.
See INPUT
and OUTPUT
ASSIGNMENT.
NOTE
Refer
to
Power
Module instruction
manual for
information concerning pins labeled
Not
used.
INPUT ASSIGNMENTS
The VERT INPUT signal,
EXT TRIG signal
and
EXT
HORIZ signal
can be applied
through
the rear
interface
connectors if
the
SC 501 is modified
as
follows:
A. VERT INPUT signal.
1. Unsolder the 200 ohm resistor
attached
to
the
VERT
INPUT connector.
Connect tl\e center conductor
of a coaxial cable
to
the 200 ohm
resistor. Connect the
coaxial cable shield
to ground.
2. Connect the other end
of the coaxial cable: center
conductor
to
pin
17B
and
shield
to
pin
16B
(common).
NOTE
Parallel operation
may
be
obtained if
another
200 ohm
resistor
is
connected in series
with
the
center conductor of
a
coaxial cable to the
junction
of
R100 and the main circuit board. The
addition
of
any
coaxial cable
to
input circuits affects
the input
impedance.
B. EXT TRIG
signal.
1 .
Connect the center conductor of
a
coaxial
cable
to
the EXT TRIG pin jack. Ground the
coaxial
cable
shield.
2.
Connect the other end of the
coaxial
cable:
center
conductor to pin 27A
and
shield
to
pin 26A
(common).
1-4
REV. B,
AUG.
1974
Operating
Instructions—
SC 501
3. Set
the trigger
source switch to
the
EXT
position
to
trigger
the
sweep from
pin
27A.
C. EXT
HORIZ signal.
1 .
Connect
the center conductor of a
coaxial cable
to
the
EXT
HORIZ pin jack.
Ground the coaxial
cable
shield.
2. Connect
the other end of the
coaxial cable: center
conductor to pin 16A
and
shield
to
pin
17A (common).
OUTPUT
ASSIGNMENTS
A
+
Gate Out
signal can
be routed to
the rear
interface
connector via
the
center conductor
of
a
coaxial
cable to
pin
27B.
Shield ground may be any
convenient
location. A
Ramp Out Signal is
factory
wired to
pin
15A
.
Other
pins
(unassigned)
are
available
at
the rear
interface
connector
for
routing signals to
and from the
SC
501 for
specialized
applications. One or more
compartments
of
a
multi-plug-in
Power Module can
be wired
with
barriers installed to
provide specific
functions
between
compartments.
See
Power Module
instruction
manual
for
additional
information.
ELECTRICAL
CHARACTERISTICS
PERFORMANCE
CONDITIONS
The
electrical
characteristics
are valid
only if the SC 501
has
been
calibrated at an
ambient
temperature
between
-h
20°C
and
-t-30°C
and is
operating at
an
ambient
temperature
between
0°C
and
-h
50°C
unless
otherwise
noted.
TABLE
1-2
VERTICAL DEFLECTION
SYSTEM
CHARACTERISTICS
Characteristics
Performance
Requirements
Supplemental
Information
Bandwidth
Dc to
at
least 5 MHz.
Deflection
Factors
10
mV/div,
100
mV/div, and 1 V/div.
Accuracy
Within 3%
of indicated deflection.
VARIABLE in XI
(fully cw)
position:
gain
correctly
set at 10
mV/div.
Uncalibrated
(Variable)
Range
Continuously variable
between steps.
Extends
deflection factor
to a
maximum
of 10
V/div.
10:1 range
for
all attenuator settings.
Low
Frequency
Linearity
0.1
division or
less
compression or
expansion of
a
two
division (at
center
screen)
signal when p>ositioned to
the
top
and bottom of
the graticule area.
Input
Coupling
Ac or dc.
Lower
bandwidth
limit when
ac-coupled
is approximately
3 Hz.
Input
Impedance
1 MJ7
paralleled by 47
pF.
Input time constant
is
normalized for
each attenuator step.
Maximum
Safe Input Voltage
350 V (dc +
peak ac).
REV.
B, AUG.
1974
1-5
operating
Instructions—SC
501
TABLE
1-3
HORIZONTAL
DEFLECTION
SYSTEM
CHARACTERISTICS
Characteristics Performance
Requirements
Supplemental
Information
Time
Base
Calibrated Sweep Rates
1 ms/div,
10
ms/div, 100 ms/div,
1
ps/div,
10
ps/div, 100
/is/div.
Uncalibrated
(Variable) Range
Extends slowest
calibrated rate to at
least
1 sec/div.
10:1
range for all
calibrated
rates.
Zero to
10 V ramp
output
available at
rear
interface
connector for
all sweep
rates
(excluding
X5
magnification).
X5
Magnifier (fixed)
Extends
fastest
calibrated sweep rate to
at
least 200
ns/div.
Accuracy (Over
8
div)
Within 5%
for all
sweep
rates.
Disregard
first
0.5
ps
of total sweep
length.
Linearity (any two
division
fxartion
within center
eight divisions)
Within 5%.
Disregard
first
0.5
/is of total sweep
length.
External Horizontal
Amplifier
Internal
switch
must
be
set
to
X-Y
position.
Bandwidth
Dcto
100 kHz.
Internally
calibrated
for
100 mV/div.
Input lmF>edance
Approximately 100
kJ2
paralleled by
25
pF.
Maximum
Input Voltage
±3
V.
TABLE
1-4
TRIGGERING
CHARACTERISTICS
Characteristics
Performance
Requirements
Supplemental
Information
Normal Trigger
Sensitivity (Trigger
LEVEL/SLOPE control
pushed in)
Internal: Dc-coupled
0.4 major
division of
deflection at dc
increasing to 1.0
major
division of
deflection at
5
MHz.
External: Dc-coupled
1 V
minimum
to 5
V
maximum
from dc
to 5 MHz.
Input
Impedance
22 Kfi
paralleled by
approximately
150
pF.
AUTO
triggering
(Trigger LEVEL/
SLOPE
control
pulled to out
position)
Sweep
free-runs in
absence of
trigger
signal or for
trigger repetition
rates
below
10 Hz.
Operating
Instructions—
SC
501
TABLE
1-5
DISPLAY
CHARACTERISTICS
Characteristics
Performance Requirements
Supplemental
Information
Graticule
Type Internal black line, nonilluminated.
Area
Six divisions vertical
by 10
divisions
horizontal.
Each division
equals
0.203 inch.
Phosphor P31
standard.
TABLE
1-6
ENVIRONMENTAL
CHARACTERISTICS
Characteristics
Performance
Requirements Supplemental
Information
Temperature
Operating
0°C to
-t50°C.
Storage
-40°C to +75‘’C.
Altitude
Operating To
15,000
feet.
Storage To 50,000
feet.
Vibration
Operating
and Non-operating
With the instrument complete
and
operating, vibration frequency swept
from 10
to
50 to
10 Hz
at
1 minute per
sweep. Vibrate 15 minutes in each
of
the
three major axes at 0.015 inch total
displacement.
Hold 3 minutes at
any
major
resonance,
or
in
none,
at
50 Hz.
Tot^l time,
54 minutes.
Shock
Operating and Non-operating
30
g's, 1/2
sine,
1 1 ms duration, 2 shocks
in
each direction along
3 major
axes, for
a
total of
12
shocks.
1-7
Section
2—SC 501
SERVICING
INFORMATION
INTRODUCTION
CONTENTS
This
section of
the manual
contains
information neces-
sary to
service
the
SC
501
A
block
diagram
and
schematic
drawings are
provided as
an
aid
in
understanding the
theory
of
operation
of the
SC
501.
A circuit
description
for each
schematic
drawing
is
included on
the
associated
foldout page.
Adjustment and
calibration
procedures are
provided on
a
foldout
page
with supporting
illustrations that
show inter-
nal adjustment
locations and
measurement
check points.
Also included is
the
electrical parts list and a
component
location
grid
to
facilitate the location
of the components
on
the etched
circuit boards.
Mechanical
parts are
listed
in the
rear of
this
section
with an
exploded
view of
the
instrument. A
list of
standard
accessories and
a
carton assembly
drawing are
on
the back
of
the
exploded view foldout
page.
MAINTENANCE
General system
maintenance
procedures are
provided in
the Power Module instruction
manal,
i.e.,
preventive main-
tenance, troubleshooting aids, parts
removal
and
replace-
ment procedures, parts ordering information, etc.
Adjustment
of
the
SC
501 may be required after
a
repair
has been made, or after long time
intervals
in
which normal
aging of components may
affect instrument accuracy.
Before
complete calibration, thoroughly
clean and in-
sfject
this
instrument as
outlined in the service section of
the Power
Module
instruction manual.
Refer to
Fig.
2-1
as
an aid
in removing
or
replacing the
cathode-ray tube.
CRT
base
socket
NOTE
It
is
not necessary
to
remove the
crt shield
or
front
panel.
CRT shield
Use
care
when handling a
crt.
Protective
clothing and
safety
glasses
should
be
worn. Avoid
striking it
on
any object
whidi
might cause it to
crack or
implode.
When storing a crt,
place
it in a
protective car-
ton or set
it face down in a
protected
location on
a
smooth
surface with a soft mat under the
faceplate
to
protect it from
scratches.
Fig.
2-1. Replacing
the cathode-ray tube.
Replacing
the
crt
will require
partial
instrument readjostments. Refer
to
CALIBRATION
ADJUST-
MENTS
foldout
page.
2-1
Servicing
Information—SC 501
TEST
EQUIPMENT REQUIRED
The
following test equipment and accessories,
or its
equivalent, is
required
for
complete
calibration
of
the
SC
501.
Specifications
given
for
the test
equipment
are
the
minimum
necessary
for accurate
calibration
or
measure-
ment. All test
equipment
is assumed
to
be correctly
calibrated
and operating
with specifications.
If other
test
equipment
is substituted, control settings or
calibration setup may
need
to
be altered to meet
the
requirements of
the
equipment
used.
Detailed
operating
instructions
for the test
equipment used
are not given in
the
adjustment
or
calibration procedures.
Refer
to
the
instruc-
tion manual
for the test
equipment if more
information is
desired.
1. TM 500
Series Power
Module
2.
Plug-in
Extender.
Tektronix Part
No.
067-0645-01.
3.
Variable
Autotransformer.
Must be
capable of
supplying
sufficient wattage
over
a
range of
90
to
132 V or
180 to
264 V.
Autotransformer
must have an ac
voltmeter
to
indicate
output
voltage.
4. Dc
Voltmeter:
accuracy
within 0.1% and a
measure-
ment
range from
—1000
V to
-t-100
V.
For example,
a
DM
501
Digital
Multimeter, or any
high impjedance
dc
voltmeter
meeting the above
requirements.
5.
Amplitude
Calibrator:
accuracy
within 0.25%. Out-
put
amplitudes
from
50
mV
to
10 V.
Square-wave
repeti-
tion rate about
1 kHz. For example, Tektronix
Calibration
Generator
PG
506 or
Calibration Fixture
067-0502-01.
6. Test
Oscilloscop>e. Minimum bandpass
of
1
MHz
and
deflection
factor
of at
least 10 mV/div
with
a 10X
probe.
For
example, Tektronix 5103/D10
oscilloscope
with
5B10N
Time
Base/Amplifier,
5A23N
Amplifier
plug-in
and
a
P6006 probe, or any
oscilloscope that meets the
above
requirements.
7.
Leveled Sine-Wave
Generator.
Tektronix
SG 503 or
191
Constant-Amplitude
Signal Generator.
8.
Time-Mark
Generator.
Tektronix
TG 501
or
2901.
9.
Input
Ndrmalizer
47
pF (BNC).
Tektronix Calibra-
tion Fixture
067-0541-00.
10. 50-ohm termination with BNC connectors.
Tektronix Part No. 01
1-0049-01.
11.
Coaxial cables. Impedance
50 ohms, RG 58/U,
maximum length
42 inches,
BNC
connectors.
Tektronix
Part No.
012-0057-01.
12. Adapter, BNC
to
pin
jack. Tektronix
Part
No.
1
75-1
1 78-00, or
equivalent.
13.
Screwdriver, three-inch
shaft, 3/32
bit. Xcelite
R-3323.
14.
Low-capacitance
screwdriver, one and
one-half inch
shaft.
Tektronix Part No.
003-0000-00.
Servicing
Information—
SC
501
DIAGRAMS
AND PARTS
LISTS
SYMBOLS
AND
REFERENCE
DESIGNATORS
Electrical
components
shown on the
diagrams are in
the following units
unless
noted otherwise:
Capacitors
=
Values one or
greater are
in picofarads (pF).
Values less
than one
are in microfarads
(pF).
Resistors
=
Ohms
Symbols
used
on
the
diagrams are based on
ANSI
Y32.2
1970.
Logic
symbology
is
based
on MIL-STD-806B
in
terms of positive logic. Logic
symbols
depict the logic function
performed
and
may
differ
from
the manufacturer's data.
The
following
special
symbols are used
on the
diagrams:
External Screwdriver adjustment.
External
control or connector.
Clockwise
control
rotation
in
direction of
arrow.
Refer
to
diagram
number indicated
in
diamond.
Refer
to
waveform
number indicated
in
hexagon.
Connection
soldered to
circuit board.
Connection made to
circuit
board
with interconnecting
pin.
Blue
tint
encloses
components
located on
circuit
board.
P/0
circuit
board
ELECTRICAL
REPLACEABLE
PARTS
LIST
PARTS ORDERING INFORMATION
Replacement parts are available from
or through your
local Tektronix,
Inc.
Field
Office or representative.
Char>ges
to Tektronix
instruments are
sometimes made
to accommodate
improved
components as they become available, and to give
you
the benefit
of the
latest
circuit
improvements developed in our engineering department.
It is
therefore
important,
when
ordering parts,
to
include the following
information
in your order:
Part number,
instrument type or number, serial number,
and modification
number if
applicable.
If
a f)art you
have
ordered
has been replaced with
a
new
or improved
part, your
local Tektronix, Inc.
Field
Office or representative will
contact
you concerning
any
chartge in
part
number.
Change information,
if
any, is located at
the
rear of this manual.
SPECIAL NOTES
AND SYMBOLS
XOOO Part first added
at
this serial number
OOX
Part removed after
this serial number
ITEM NAME
In the Parts List, an Item Name is
separated from
the description
by
a colon
(:).
Because
of
space limitations, an
Item Name may sometimes appear
as incomplete.
For
further Item Name
identification, the
U.S.
Federal
Cataloging Handbook
H6-1
can be
utilized
where
possible.
ABBREVIATIONS
ACTR ACTUATOR
PLSTC PLASTIC
ASSY ASSEMBLY QTZ
QUARTZ
CAP CAPACITOR, RECP
RECEPTACLE
CER CERAMIC
RES RESISTOR
CKT CIRCUIT
RF RADIO
FREQUENCY
COMP COMPOSITION
SEL SELECTED
CONN CONNECTOR SEMICOND
SEMICONDUCTOR
ELCTLT ELECTROLYTIC SENS
SENSITIVE
ELEC
ELECTRICAL SEP
SEPARATELY
FXD FIXED
VAR
VARIABLE
INC
AND
INCANDESCENT
WW
Wl
REWOUND
LED LIGHT
EMITTING DIODE
XFMR
TRANSFORMER
NONWIR
NON
Wl
REWOUND
XTAL
CRYSTAL
Electrical Parts
List—
SC 501
CROSS
INDEX MFR.
CODE
NUMBER TO
MANUFACTURER
MFR.CODE
MANUFACTURER
ADDRESS
CITV.STATE.ZIP
0085
SaztgaiBO Electric
Co.
,
S.
Carolina
Dlv.
F.
O.
Box
128
Pickens,
SC
29671
01002
General Electric
Co.
,
Industrial and
Pover Capacitor
Products Dept,
John
St.
Hudson
Falls, NY 12839
0X121
Allen-Bradley
Co. 1201
2nd
St.
South
Milwaukee,VL53204
02735 BCA Corp.
,
Solid State Division Route
202
Somerville,
NY
08876
03508
General
Electric
Co
.
Semi-Conductor
Products
Dept.
Electronics
Peu'k
Syracuse, NY
13201
04713
Motorola, Inc.
,
Soslconductor
products Dlv.
5005 E. McDowell Rd.
Phoenix,
AZ 85008
07263
Fsirchild
Semiconductor,
X
Dlv.
of
FEtlrchild Camera and Instrument
Corp. 464 Ellis St.
Mountain
View,CA94040
07910 Teledyne
Semiconductor 12515 chadron
Ave.
Hawthorne, CA 90250
10389 Chicago Switch
,
Inc
2035
Wabansia Ave.
Chicago, IL
60647
12040 National
Semiconductor Corp.
Ccsmnerce
Drive
Danbury,
CT
06810
14752 Electro Cube
Inc. 1710
S.
Del Mar Ave.
San
Gabriel,
CA
91776
22229 Solltron
Devices,
Inc.
8808
Balboa
Ave.
San Diego, CA
92123
24931
Specialty Connector
Co., Inc. 3560 Madison Ave.
Indianapolis,
IN
46227
27014
National Semi-Conductor Corp. 2900
San
Ysidro Way
Santa Clara,
CA 95051
34553-
Ai^rex Electronic
Corp.
,
Coo^nent Dlv. 35 BOfAllan Ave.
Bappauge, NY
11787
56289 Sprague Electric
co.
North Adams,
MA 01247
63743
Nsurd
Leonard
Electric
Co., Inc. 31
South St.
Mount Vernon, NY
10550
71590 Centralab Electronics, Dlv.
of
Globe-Union, Inc. 5757
N.
Green
Bay
Ave.
Milwaukee,
WI
53201
71744
Chicago Miniature
Laji^ Works
4433 Ravenswood Ave. Chicago, IL
60640
72136 Electro
Motive
Mfg.
Co.,
Inc., The
South Park and John Streets
Willimantic,
CT 06226
72982 Erie Technological Products, Inc. 644W.12th
St.
Erie, PA
16512
73138 Beckman
Instruments, Inc., Bellpot Dlv. 2500 Harbor Blvd. Fullerton,
CA
92634
74970
Johnson,
£.
F.
,
Co. 299 10th
Ave.
S.
W.
Waseca,
MN
56093
75042
TRW
Electronic Coe^xments,
IRC
Fixed
Resistors,
Philadel^la Division 401
N.
Broad
St.
Philadelphia,
PA
19108
80009 Tektronix, Inc.
P.
0. Box 500 Beaverton,
OR 97005
91637 Dale
Electronica, Inc.
P. 0. Box 609 Columbus,
NB 68601
Electrical
Parts
ListSC
501
Tektronix
Ckt No.
Port
No.
Serial/Model
No.
Eff
Dscont
Nome
&
Description
Mfr
Code
A1
670-3304-00
CKT
BOARD ASSY:MAIN
80009
A2
670-3364-00
CKT BOARD ASSY :
AMPLIFIER
80009
ClOO
283-0189-00
C102
281-0184-00
C104
281-0153-00
C105
281-0628-00
C107
283-0641-00
CAP.,FXD,CER
DI:0.lDF,20%,400V
72982
CAP.
,VAR,PLSTC:2-18PF,500VDC
34553
CAP.
, VAR,AIR
DI:1.7-10PF,
250V
74970
CAP.,rXD,CER
DI:15PF,5%,600V
72982
CAP.
,FXD,MICA
D:180PF,1%,100V
00853
Clio
281-0184-00
C112
281-0153-00
C113
281-0628-00
C115
283-0696-00
C117
281-0184-00
CAP.
,VAR,PLSTC:2-18PF,500VDC
34553
CAP.
,
VAR,AIR
DI:1.7-10PF,
250V
74970
CAP.,FXD,CER
DI:15PF,5%,600V
72982
CAP.
,FXD,MICA
D:2300PF,1%,500V
72136
CAP.
,VAR,PLSTC:2-18PF,500VDC
34553
C118
281-0576-00
C120
283-0003-00
C124
290-0525-00
C127
281-0518-00
C138
283-0003-00
CAP.,FXD,CER
D1:11PF,5%,S00V
72982
CAP.,FXD,CER
DI:0.01UF,
+80-20%, 150V
72982
CAP.
,FXD,ELCTLT:4.7tJF,20%,50V
56289
CAP.,FXD,CER
DI:47PF,+/-9.4PF,500V
72982
CAP.,FXD,CER
DI
:0.01UF,
+80-20%, 150V
72982
C154
281-0528-00
C156
290-0525-00
C169
281-0576-00
C200
281-0550-00
C204
281-0629-00
CAP.,FXD,CER
DI:82PF,+/-8.2PF,500V
72982
CAP.,FXD,ELCTLT:4.7UF,20%,50V
56289
CAP.,FXD,CER
DI:11PF,5%,500V
72982
CAP.,FXD,CER
DI:120PF,10%,500V
72982
CAP.,FXD,CER
DI:33PF.,5%,600V
72982
C205
290-0522-00
C210
283-0004-00
C218
290-0522-00
C220
283-0051-00
C228
283-0594-00
CAP.
,FXD,ELCTLT:1UF,20%,50V
56289
CAP.,FXD,CER
DI:0.02UF,
+80-20%, 150V
72982
CAP.,FXD,ELCTLT:1UF,20%,50V
56289
CAP.,FXD,CER
DI:0.00330F,5%,100V
72982
CAP.
,FXD,MICA
D:0.001DF,1%,100V
00853
C229
285-1049-00
CAP
C230
285-1051-00
CAP
C270
283-0003-00
CAP
C305
281-0524-00
CAP
C310
281-0658-00
CAP
C318
281-0638-00
CAP
C339
281-0526-00.
CAP
C345
283-0178-00
CAP
C346
283-0178-00
CAP
C348
283-0003-00
CAP
C367
283-0010-00
CAP
C369
290-0522-00
CAP
C375
283-0010-00
CAP
C378
290-0410-00
CAP
C380
285-0629-00
CAP
.
,FXD,PLSTC:0.010F,1%,200V
14752
.
,FXD,PLSTC:1UF,1%,200V
14752
.,FXD,CER
DI.-O.OIOF,
+80-20%, 150V
72982
.,FXD,CER
DI:150PF,+/-30PF,500V
72982
.,FXD,CER
DI:6.2PF,+/-0.25PF,500V
72982
.,FXD,CER
DI:240PF,5%,500V
72982
.
,FXD,CER
DI:1.5PF,+/-0.5PF,500V
72982
.,FXD,CER
DI:0.1OF,
+80-20%, lOOV
72982
.
,FXD,CER
DIiO.lOF,
+80-20%, lOOV
72982
.,FXD,CER
DI:0.01UF,
+80-20%,
150V
72982
.,FXD,CER
DI:0.0'50F,
+100-20%,
50V 56289
.,FXD,ELCTLT:1UF,20%,50V
56289
.,FXD,CER
DI:0.050F,
+100-20%, 50V
56289
.
,FXD,ELCTLT:15UF,
+50-10%, lOOV
56289
.
,FXD,PLSTC:0.047UF,20%,100V
01002
C382
290-0410-00
C384
283-0267-00
C385
283-0267-00
C387
283-0267-00
C388
283-0267-00
CAP.
,FXD,ELCTLT:15UF,
+50-10%, lOOV
56289
CAP.
,FXD,CER
DI:0.01DF,20%,500V
72982
CAP.
,FXD,CER
DI:0.01UF,20%,500V
72982
CAP.,FXD,CER
DI:0.01DF,20%,500V
72982
CAP.
,FXD,CER
DI:0.01UF,20%,500V
72982
C390
283-0267-00
C391
283-0267-00
C392
283-0013-00
C394
283-0013-00
C395
283-0013-00
CAP.
,FXD,CER
DI:0.010F,20%,500V
72982
CAP.
,rxD,CER
DI:0.01DF,20%,500V
72982
CAP.,FXD,CER
DI:0.01UF,
+100-0%, lOOOV
56289
CAP.,FXD,CER
DI:0.01UF,
+100-0%, lOOOV
56289
CAP.,FXD,CER
DI:0.01UF,
+100-0%,
lOOOV
56289
C397
283-0013-00
C408
283-0279-00
CAP.,FXD,CER
DIiO.OlUF,
+100-0%, lOOOV
56289
CAP. ,FXD,CER
DIiO.OOlOF, 20%,
3000V
72982
Mfr
Part Number
670-3304-00
670-3364-00
8151-400X5R104M
2222-809-05003
187-0106-005
301-000C0G01S0G
D151E181F0
2222-809-05003
187-0106-005
301-OOOCOGO15OG
2222-809-05003
301-050COG0110J 855-547E103Z
196D475X00S0KA1
301-O0OU2J047OM 85S-547E103Z
301-OOOU2M0820K
196D475X0050KA1
301-050COG0110J
301-OOOX5P0121K
308-000COG0330G
196D105X0050HA1
855016Z5V0203Z
196D105X0050HA1
8131N145C0G332J
D151F102F0
230B1C103F 230B1C105F
855-547E103Z
301-OOOX5UO151M
301-000C0H0629C
301-OOOZ5D0241J
301-OOOS2K0159D 8131N145651104Z
8131N145651104Z
855-547E103Z
273C20
196D105X0050HA1
273C20
30D156F1000DD4
64F19AB473
30D156F1000DD4
841-541C103M 841-541C103M 841-541C103M 841-541C103M
841-541C103M 841-541C103M
33C29A7
33C29A7 33C29A7
33C29A7
878Y5S102M
REV. B
AUG
1974
2-6
Electrical Parts
List—
SC
501
Tektronix
Serial
/Model
No.
Ckt No.
Port No.
Eff
Dscont
C412
290-0522-00
C41S
283-0343-00
C418
283-0279-00
C420
290-0164-00
C422
281-0638-00
C424
283-0057-00
C505
281-0638-00
CS14
290-0525-00
C520
290-0525-00
CS2S
290-0525-00
C527
290-0525-00
C530
290-0525-00
CS37
290-0525-00
C540
281-0638-00
CR121
152-0246-00
CR12S
152-0141-02
CR152
152-0141-02
CR154
152-0141-02
CR165
152-0233-00
CR178
152-0233-00
CR190
152-0141-02
CR200
152-0141-02
CR201
152-0141-02
CR215
152-0141-02
CR238
152-0141-02
CR280
152-0141-02
CR282
152-0141-02
CR285
152-0061-00
CR290
152-0061-00
CR334
152-0141-02
CR362
152-0141-02
CR365
152-0141-02
CR366
152-0141-02
CR382
152-0107-00
CR384
152-0107-00
CR386
152-0107-00
CR387
152-0107-00
CR389
152-0107-00
CR390
152-0107-00
CR392
152-0107-00
CR415
152-0107-00
CR416
152-0107-00
CR418
152-0107-00
CR420
152-0107-00
CR424
152-0107-00
CR540
152-0141-02
DS515
150-0109-00
JlOO
131-0955-00
JlOl
355-0170-00
Name
&
Description
CAP
.
,FXD
,
ELCTLT
;
lUF
,
20%
,
50V
CAP.,FXD,CER
DI:0.01OF,
20%,
2000V
CAP.,FXD,CER
DIsO.OOlDF,
20%,
3000V
CAP
.
,FXD
,
ELCTLT :
lOF
, +50-10%
,
ISOV
CAP.,FXD,CER
DI:240PF,5%,500V
CAP.,FXD,CER
DliO.lOF,
+80-20%,
200V
CAP.,FXD,CER
DI:240PF,S%,500V
CAP.
,FXD,ELCTLT:4.70F,20%,50V
CAP
.
,FXD
,ELCTLT : 4
.
TOT,20%
,
50V
CAP.
,FXD,ELCTLT!4.7UF,20%,50V
CAP.
,FXD,ELCTLT:4.7OF,20%,50V
CAP
.
,
FXD ,ELCTLT
!
4
. 70F , 20%
,
50V
CAP.
,FXD,ELCTLT!4.7OF,20%,50V
CAP.,FXD,CER
OI:240PF,5%,500V
SEMICOND
DEVICE:SILICON,400PIV,200MA
SEMICOND
DEVICE:
SILICON,
30V,
150MA
SEMICOND
DEVICE:
SILICON,
30V,
1
SOMA
SEMICOND
DEVICE:SILICON,30V,lS0MA
SEMICOND
DEVICE:SILICON,8SV,100MA
SEMICOND
DEVICE:SILICON,8SV,100MA
SEMICOND
DEVICE
:SILICON,
30V,
150MA
SEMICOND
DEVICE
:SILICON,
30V,
150MA
SEMICOND
DEVICE:
SILICON,
30V,
ISOMA
SEMICOND
DEVICE:
SILICON,
30V, 1
SOMA
SEMICOND
DEVICE:SILICON,30V,150MA
SEMICOND
DEVICE
:SILICC»J,
30V,
150MA
SEMICOND
DEVICE:SILICON,30V,150MA
SEMICOND
DEVICE:
SILICON, 17
SV,100MA
SEMICOND
DEVICE;
SILICON,
17
5V,100MA
SEMICOND
DEVICE :
SILICON,
30V, 1
SOMA
SEMICOND
DEVICE
:SILICON,
30V,
ISOMA
SEMICOND
DEVICE:
SILICON,
30V, ISOMA
SEMICOND
DEVICE:SILICON,
30V, ISOMA
SEMICOND
DEVICE:SILICC»J,375V,400MA
SEMICOND
DEVICE:SILICON,375V,400MA
SEMICOND
DEVICE
:SILICON,
375V,
400MA
SEMICOND
DEVICE:SILICON,37SV,400MA
SEMICOND
DEVICE:
SILICON,
375V,
400MA
SEMICOND
DEVICE:SILICON,375V,400MA
SEMICOND
DEVICE:SILICON,375V,400MA
SEMICOND
DEVICE :
SILICON
,
37 SV
,
400MA
SEMICOND
DEVICE:SILICON,37SV,400MA
SEMICOND
DEVICE:
SILICON,
375V,
400MA
SEMICOND
DEVICE:SILICON,375V,400MA
SEMICOND
DEVICE:SILICON,37SV,400MA
SEMICOND
DEVICE-.SILICON,
30V, ISOMA
LAMP
,
INCAND :
18V
,
26MA
CONNECTOR,
RCPT,
:BNC,
FEMALE
STDD,SH(XILDERED:6-32
X
0.40 INCH
LONG
Mfr
Code
Mfr Part
Number
56289
196D105X0050HA1
72982
3848-019E103M
72982
878YSS102M
56289
30D105F1S0BA4
72982
301-000ZSD0241J
56289
274C10
72982
3O1-O00Z5DO24U
56289
196D47SX0050KA1
56289
196D475X0050KA1
56289
196D475X0050KA1
56289
196D475XOOSOKA1
56289
196D475X0050KA1
56289
196D475X0050KA1
72982
301-OO0Z5D0241J
07910
CD12676
07910
1N4152
07910
1N4152
07910
1N4152
07910
CD61128
07910
CD61128
07910
1N4152
07910
1N4152
07910
1N4152
07910
1N4152
07910
1N4152
07910
1N4152
07910
1N4152
80009
152-0061-00
80009
152-0061-00
07910
1N4152
07910
1N4152
07910
1N41S2
07910
1N4152
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
80009
152-0107-00
07910
1N4152
71744
CM7220
24931
28JR200-1
80009
355-0170-00
L415^
P415^
^Furnished
as a unit
with
V415.
2-7
REV.
B
AUG
1974
Electrical
Parts List—
SC 501
Ckf
No.
Tektronix
Port No.
Seriol/Model
No.
Etf Dscont
Nome
& Description
Mfr
Code Mfr
Port
Number
Q120A,B
151-1011-00
TRANSISTOR
: SILICON
,
JFE
,
N-CHANNEL
,
DUAL 22229 FD1167
C125
151-0190-00
TRANSISTOR
: SILICON
,
NPN
04713 2N3904
Q135
151-0190-00
TRANS
ISTOR : S ILIC£»I
,
NPN
04713 2N3904
Q148
151-0190-00
TRANSI STOR ! S
ILICON,NPN
04713
2N3904
Q150
151-0188-00
TRANSISTOR
: SILICC8J
,
PNP
04713 2N3906
Q158
151-0188-00
TRANSI STOR
: S ILICON
,
PNP
04713
2N3906
Q160
151-0190-00
TRANSISTOR : SILICON
,
NPN
04713 2N3904
C165
151-0279-00
TRANSISTOR
: SILICON
,
NPN
07263
S25381
Q167
151-0190-00
TRANSI STOR : S ILICON
,
NPN
04713 2N3904
C176
151-0190-00
TRANSISTOR:
SILICON
,
NPN
04713 2N3904
Q178
151-0279-00
TRANSI STOR
: S ILICON
,
NPN
07263
S25381
Q184
151-0342-00
TRANS
ISTOR
: SILICON
,
PNP
07263
2N4249
Q190
151-0341-00
TRANSISTOR : SILICON
,
NPN
07263 2N3565
Q230A,B
151-1054-00
TRANSISTOR
: SILIOXJ
,
JFE ,N-CHANNEL
.DUAL
22229 FD1644
C240
151-0190-00
TRANSISTOR
: SILICON
,
NPN
04713 2N3904
Q250
151-0190-00
TRANSISTOR:SILICON,NPN
04713 2N3904
C252
151-0342-00
TRANSISTOR
: S ILICCM
,
PNP
07263
2N4249
C270
151-0342-00
TRANSISTOR
: SILICCM
,
PNP
07263
2N4249
Q285
151-0347-00
TRANSISTOR
: S ILICON
,
NPN
80009
151-0347-00
Q290
151-0347-00
TRANSISTORiSlLICON
,NPN
80009
151-0347-00
5305A,B
151-1054-00
TRANSISTOR
: SILICON
,
JFE
,
N-CHANNEL
,
DUAL
22229 FD1644
Q315
151-0341-00
TRANS
ISTOR
: SILICON
,
NPN
07263 2N3565
C320
151-0341-00
TRANSISTOR:SILICON,NPN
07263
2N3565
C336
151-0342-00
TRANSI STOR : S
ILICON,PNP
07263 2N4249
C345
151-0350-00
TRANSI STOR : SILICON,PNP
07263
2N5401
Q348
151-0347-00
TRANS
ISTOR : S ILICON
,
NPN
80009
151-0347-00
C350
151-0301-00
TRANSISTOR
: S ILICON
,
PNP
04713
2N2907A
Q360
151-0519-00
TRANSISTOR:SILICON,SCR
04713
2N5063
C365
151-0254-00
TRANSISTOR
: SILICON
,
NPN
03508 2N5308
0370
151-0301-00
TRANSISTOR
: SILICON
,
PNP
04713 2N2907A
Q380
151-0358-00
TRANSISTOR:SILICON,NPN,SEL
FROM D44R4 03508
D44R211
0500
151-0190-00
TRANSI STOR : S
ILICON
,
NPN
04713 2N3904
0510
151-0342-00
TRANSISTOR
: SILICON
,
PNP
07263 2N4249
0520
151-0208-00
TRANSISTOR : SILICtW , PNP
12040 2N4036
0525
151-0341-00
TRANS
ISTOR : SILICON
,
NPN
07263
2N3565
0530
151-0342-00
TRANSISTOR: SILICON
,
PNP
07263
2N4249
0535
151-0136-00
TRANS
ISTOR
: S ILICON
,
NPN
02735 35495
0540
151-0342-00
TRANSISTOR
: SILICON, PNP
07263
2N4249
0545
151-0341-00
TRANSISTOR: S
ILICON
,
NPN
07263 2N3565
RlOO
315-0201-02
RES.,FXD,CC»0>:200
OHM,5%,0.25W
01121 CB2015
R105
322-0621-00
RES.,FXD,FILM:900K CNm,l%,0.25W
75042 CEBT0-9003F
R107
321-0617-00
RES.
,FXD,
FILM: lllK OHM,1%,0.125W 75042
CEAT0-1113F
R113
322-0624-00
RES. ,FXD,FIU!:990K
OHM,1%,0.25W
75042 CEBT0-9903F
R115
321-0614-00
EES. ,FXD,Fim:10.1K
C«M,1%,0125W
75042 CEAT0-1012F
R117
321-0481-00
RES.,FXD,FIm:lM OHM,1%,0.125W
75042 CEAT0-1004F
R120
315-0104-00
RES.,FXD, COMP :100K CNm,5%,0.25W
01121
CB1045
R121
315-0201-00
RES.
,FXD,COMP:20O OHM,5%,0.25W
01121 CB2015
R125
321-0184-00
RES. ,FXD,FILM:806 OHM,1%,0.125W
75042
CEAT0-8060F
R127
321-0242-00
RES.,FXD,FILM:3.24K
75042 CEAT0-3241F
R129
321-0086-00
EES. , FXD,FILM:
76.
8 OHM,1%,0.125W
75042
CEAT0-76R80F
R130
311-1182-00
RES.
,VAR,NONWIR:1.5X
OHM, 10%, 0.
SOW
01121 W-783S
R132
311-1560-00
RES. ,VAR,NONWIR:5K OHM,
5%,
0, SOW
73138
91A-500CW1
R134
321-0242-00
RES, ,FXD,FILM:3.24K
CNiM,l%,0.12SW 75042
CEAT0-3241F
R136
321-0181-00
EES.
,FXD,FILM:750 OHM,1%,0.125W 75042
CEAT0-7500F
REV. B AUG 1974
2-8
Electrical
Parts
List—
SC
501
Ckt No.
Tekfronix
Port No.
Serial /Model No.
Eff Dscont Name
&
Description
Mfr
Code
Mfr Part Nur
R138 31S-0S60-00
RES.,
FXD,
COMP:
56
OHM,5%,0.25W
01121
CB560S
R139
315-0472-00
RES.,FXD,COMP:4.7K OHM,5*,0.25W
01121 CB4725
R142
311-1558-00
R£S.,VAR,t)ONWIR:20R (%M ,
20%
,
0
. SOW
73138 91A-20001M
R145
311-1298-00
RES.,VAR,NOtJWIR.-10K
OHM,
20%,
0.
SOW
01121
W7909
R146
315-0622-00
RES.,FXD,COMP:
6.
2K 0HM,5%,0.25W
01121
CB6225
R147
315-0155-00
RES.,FXD,COMP:1.5M
OHM,5%,0.25W
01121
CB1555
r148
315-0103-00
RES.
,
FXD,
COMP: lOK OHM,5%,0.25W
01121
CB1035
R150
321-0221-00
RES.,FXD,FILM:1.96K
OHM,1%,0.125W
75042 CEAT0-1961F
R1S2
321-0230-00
RES.,FXD,FILM:2.43K OHM,1%,0.125W
75042
CEAT0-2431F
R154
321-0155-00
RES.,FXD, FILM:402 OHM,l% ,0.12SW
75042
CEATO-4020F
R156
321-0230-00
RES.,FXD,FILM:2.43K OHM,1%,0.125W
75042
CEAT0-2431F
Rise
321-0221-00
RES.,FXD,FIIM:1.96K
OHM,1%,0.125W
75042
CEAT0-1961F
R160
315-0103-00
RES.,FXD, COMP :10K
OHM,S%,0.2SW
01121
CB1035
R165
308-0293-00
RES.,FXD,WW:4K OHM,5%,3W
91637
RS2B-B40000J
R167
322-0210-00
RES. ,FXD,FILM:1.5K CHM,1%,0.25W
75042
CEBT0-1501F
R169
321-0184-00
RES.
,
FXD,
FILM:
806
OHM,1%,0.125W
75042
CEATO-8060F
R172
311-1563-00
RES. ,VAR,N0NWIR:1K OHM,
20%,
0. SOW
73138
91A-10000M
R174
315-0392-00
RES.,FXD,COMP:3.9K CMffl,5%,0.25W
01121
CB392S
R176
322-0210-00
RES. ,FXD,FILM:1.5K OHM,1%,0.25W
75042
CEBT0-1501F
R178
308-0293-00
RES.,FXD,WW:4K
OHM,5%,3W
91637
RS2B-B40000J
R184
315-0622-00
RES. , FXD,
COMP
:6.2K
OHM,5%,0.2SW
01121
CB6225
Riee
311-1565-00
RES.,VAR,NONWIR:250 OHM,
20%,
0.
SOW 73138
91A250R0M
R187
315-0331-00
RES.
,
FXD,
COMP :330 OHM,5%,0.25W
01121
CB3315
R189
315-0561-00
RES.,FXD,
COMP:
560
OHM,5%,0.25W
01121
CB5615
R190
315-0182-00
RES. ,
FXD,
COMP
:1.8K
C«M,5%,0.2SW
01121
CB1825
R192
315-0272-00
RES.
,FXD,COMP:2.7K
OHM,5%,0.25W
01121
CB2725
R200
315-0223-00
RES.,FXD,COMP:22K CMM,5%,0.25W
01121
CB2235
R205
315-0332-00
RES.,FXD,CC»a>:3.3K
C»M,5%,0.25W
01121
CB3325
R210
311-1686-00
RES.,VAR,NONWIR:2.5K OHM,20%,1W
01121
12M358
R212
311-1559-00
RES. ,VAR,NONWIR:10K
OHM,
20%,
0.
SOW
73138
91A-10001M
R214
315-0333-00
RES.,FXD,
COMP:
3
3K
OHM,5%,0.25W
01121
CB3335
R215
315-0122-00
RES.,FXD,COMP:1.2K
OHM,5%,0.25W
01121
CB1225
R220
315-0223-00
RES.,
FXD,
COMP
:22K
OHM,5%,0.25W
01121
CB2235
R22S
311-1686-00
RES.
,VAR,N0NWIR:2.5K OTM,20%,1W
01121
12M358
R226
311-1564-00
RES.,VAE,NONWIR:500 CMM,20%,0.50W
73138
91A-500R0M
R228
321-0368-00
RES.,FXD,FILM:66,SK
OHM,1%,0.125W
75042
CEAT0-6652F
R229
322-0464-00 RES. ,FXD,FILM:665K
OHM,1%,0.25W
75042
CEBT0-6653F
R230
323-0557-08
RES.,FXD,FILM:6.19M OHM,1%,0.50W
75042
CECT2-6194F
R231
321-0450-00
RES., FXD,FILM :475K
OHM,1%,0.125W
75042
CEAT0-4753F
R235
311-1558-00
RES. ,VAR,NONWIR:20K
OHM, 20%,
0.
SOW
73138
91A-20001M
R236
315-0433-00
RES.,FXD, COMP:
4
3K
OHM,5%,0.25W
01121
CB4335
R238
315-0432-00
RES.,FXD,COMP:4.3K OTM,5%,0.25W
01121 CB4325
R240
315-0103-00
RES. , FXD,
COMP: lOK
OHM,5%,0.25W
01121
CB1035
R242
315-0303-00
RES., FXD, COMP :30K
OHM,5%,0.25W
01121
CB3035
R245
311-1558-00
RES.
,VAR,N0NWIR;20K OHM,
20%,
0.
SOW
73138
91A-20001M
R248
315-0562-00
RES. ,FXD,COMP:5.6K C«M,5%,0.25W
01121
CB5625
R250
315-0103-00
RES. , FXD,COMP: lOK
OHM,S%,0.25W
01121
CB103S
R251
315-0471-00
RES.,FXD, COMP: 4
70
OHM,5%,0.25W
01121
CB471S
R252
321-0246-00
RES.,FXD,FILM:3.57K
CMM,1%,0.125W
75042
CEAT0-3S71F
R254
321-0259-00
RES. ,FXD,FILM:4.87K OHM,1%,0.12SW
75042
CEAT0-4871F
R256
315-0512-00
RES.,FXD,C0MP:S.1K OHM,5%,0.25W
01121 CB5125
R2S8
311-1564-00
RES. ,VAR,NONW1R:500
OHM
,
20%
,0.
SOW
73138
91A-5O0R0M
R260
315-0821-00
RES,,FXD, COMP:
820
OHM,5%,0.25W
01121
CB8215
R265
311-1561-00 RES. ,VAR,N0NWIR:2.5K OHM,
20%,
0. SOW
73138
91A-25000M
R267
321-0259-00
RES. ,FXD,FILM:4.87X
OBM,1%,0.125W
75042
CEAT0-4871F
2-9
REV. B
AUG
1974
Electrical Parts List
SC
501
Ckt
No.
Tektronix
Port
No.
Seria
Eff
1
/Model
No.
Dscont
Nome
&
Description
Mfr
Code Mfr Part
Number
R270
321-0246-00 RES.
,FXD,FILM:3.57K OHM.l*
.0.125W 75042
CEAT0-3571F
R272
315-0222-00
RES.
,FXD,COMP:2.2K
C»IM,5%,0.25W
01121
CB2225
R273
315-0912-00
RES.,FXD,C«a>!9.1K
C«M,5%,0.25W
01121 CB9125
R275
311-1298-00 RES.
,VAR,fKMWIR:10K C«JM , 20% , 0 .
SOW
01121 W7909
R280
315-0102-00
RES.,FXD,CCMP:1K
OHM,5%,0.25W
01121 CB1025
R285
308-0412-00
RES.,FXD,WW:8.2K
OHM,l%,3W
91637 RS288201F
R287
321-0243-00
RES.,FXD,FIU<:3.32K
OHM,1%,0.125W
75042
CEAT0-3321F
R289
321-0193-00 RES.
,FXD,FIU1:1K
CMM,1%,0.125W
75042 CEATO-IOOIF
R291
321-0243-00
RES.
,FXD,FIIA!:3.32K
OHM,1%,0.125W
75042 CEAT0-3321F
R294
308-0412-00
RES.
,FXD,WW:8.2K
OHM,l%,3W
91637 RS288201F
R300
311-1555-00
RES.,VAR,NONWIR:100K
C«M,20%,0.5W
73138 91A-10002M
R302
315-0153-00
RES.
,FXD,CCMP:15K OHM,5%,0.25W
01121 CB1535
R303
315-0512-00
RES.
,FXD,COMP:5.1K
OHM,5%,0.25W 01121 CB5125
R305
315-0392-00
RES.
,FXD,COMP:3.9K
C«M,5%,0.25W
01121 CB3925
R307
315-0332-00
RES.
,FXD,CCMP:3.3K
OTM,5%,0.25W
01121
CB3325
R310
315-0243-00
RES.
,FXD,COMP:24K
OHM,5%,0.25W
01121
CB2435
R315
315-0273-00
RES.
,FXD,C0MP:27K
OHM,5%,0.25W
01121
CB2735
R316
315-0273-00
RES.,FXD,CX»G>:27K
OHM,5%,0.25W
01121 CB2735
R318
315-0103-00
RES.
,FXD,COMP:10K
C»M,5%,0.25W
01121
CB1035
R320
315-0222-00
RES.,FXD,C0MP:2.2K
C»JM,5%,0.25W
01121 CB2225
R324
321-0226-00
RES.
,FXD,FILM:2.21K
OHM,1%,0.125W
75042 CEAT0-2211F
R326
321-0298-00
RES.,FXD,FIU<:12.4K
QHM,1%,0.125W
75042 CEAT0-1242F
R328
315-0113-00
RES.,FXD, COMP :11K
C»M,5%,0.25W
01121 CB1135
R330
311-1298-00
RES.,VAR,NONWIR:10K
CttiM,20%,0.50W
01121
W7909
R334
315-0184-00
RES.
, FXD,
COMP: 180K
OHM,S%,0.25W
01121
CB1845
R336
315-0222-00
RES.,FXD,CC«P:2.2K
C«m,5%,0.25W
01121
CB2225
R337
315-0472-00
RES.,FXD,COMP:
4.
7K
C«M,5%,0.25W
01121
CB4725
R339
321-0344-00
RES.,
FXD,FILM: 37.
4K OHM,1%,0.125W
75042 CEAT0-3742F
R342
315-0683-00
RES.,FXD,COMP:68K
OHM,5%,0.25W
01121 CB6835
R343
315-0682-00
RES.
,FXD,COMP:6.8K
OHM,5%,0.25W
01121 CB6825
R345
315-0471-00
RES. ,
FXD,
COMP :470
OHM,5%,0.25W
01121 CB4715
R346
315-0182-00
RES.
,FXD,COMP:1.8K
OHM,5%,0.25W
01121 CB1825
R348
315-0101-00
RES.,FXD,
COMP:
100
OHM,5%,0.25W
01121 CB1015
R352
315-0102-00
RES.
, FXD,COMP: IK
OHM,5%,0.25W
01121
CB1025
R354
315-0472-00.
RES. , FXD,
COMP: 4. 7K
C«M,5%,0.25W
01121 CB4725
R356
315-0183-00
RES.,FXD,
COMP
:18K
OHM,5%,0.25W
01121 CB1835
R357
315-0102-00
RES. , FXD,
COMP: IK OHM,5%,0.25W
01121 CB1025
R362
321-0645-00
RES.
, FXD, FILM:
lOOK
OHM,0.5%,0.125W
75042 CEAT2100KD
R363
315-0102-00
RES. ,
FXD,
COMP: IK
Omi,5%,0.25W
01121 CB1025
R365
315-0103-00
RES.
, FXD, COMP: 1OK
OHM,5%,0.25W
01121
CB1035
R367
315-0103-00
RES.
,
FXD,
COMP: 1OK
OHM,5%,0.25W
01121 CB1035
R369
315-0101-00
RES.
,FXD,CCWP:100
OHM,5%,0.25W
01121
CB1015
R370
315-0222-00
RES.
,FXD,COMP:2.2K
OHM,5%,0.25W
01121 CB2225
R372
315-0682-00
RES.
,FXD,COMP:6.8K
OHM,5%,0.25W
01121 CB6825
R374
315-0472-00
RES. , FXD,
COMP :4.7K
OHM,5%,0.25W
01121 CB4725
R375
315-0101-00
RES.
, FXD,
COMP: 100
OHM,5%,0.25W
01121
CB1015
R378
315-0100-00
REE. , FXD,
COMP:
10
OHM,5%,0.25W
01121 CB1005
R380
315-0100-00
RES.
,FXD,COMP:10
OHM,5%,0.25W
01121 CB1005
R382
315-0220-00
RES. , FXD,
COMP
:22
OHM,5%,0.25W
01121 CB2205
R392
315-0822-00
RES.
,FXD,COMP:8.2K
OHM,5%,0.25W
01121
CB8225
R395
315-0203-00
RES.,FXD,CX»IP:20K
OHM,5%,0.25W
01121
CB2035
R397
315-0100-00
RES. , FXD,
COMP :10
OHM,5%,0.25W
01121 CB1005
R398
315-0100-00
EES.
,FXD,COMP:10
OHM,5%,0.25W
01121 CB1005
R400
321-0481-00
RES.
,FXD,FILM:1M
OHM,1%,0.125W 75042
CEAT0-10O4F
R402
321-0481-00
RES.
,FXD,FILM:1M
OHM,1%,0.125W 75042 CEAT0-1004F
REV. B AUG
1974
2-10
Electrical
Parts
List—
SC 501
Ckf
No.
Tektronix
Port
No.
Serial/Modet No.
Eff Dscont
Nome
&
Description
Mfr
Code Mfr Part
Number
R405
311-1312-00
R£S.,VAR,N0NWIR:5M
OHM,20%,1W
01121 10M156A
R406 321-0481-00
RES,,FXD,Fn«;lM
OHM,1%,0.125W 75042 CEAT0-1004F
R407 321-0481-00
RES.,
FXD,FILM :1M 0HM,1%,0.125W
75042 CEAT0-1004F
R408 321-0481-00
RES.
,FXD,FIIM:1M C»]M,1%,0.12SW 75042 CEAT0-1004F
R410
315-0106-00
RES.,FXD,COMP :lC»t OHM,5%,0.2SW
01121 CB1065
R412
321-0377-00
RES.,FXD,FIIM:82.5K
OHM,1%,0.125W
75042 CEAT0-8252F
R413
321-0354-00
RES.,FXD,FILM:47.5K
0HM,1%,0.125W 75042 CEAT0-4752F
R414
315-0822-00
RES.,FXD,COMP:8.2K
OHM,S%,0.25W
01121
CB8225
R415
311-1558-00
RES.,VAR,IK)NWIR:20K
C*M,20%,0.50W 73138 91A-20001M
R422
315-0334-00
RES.,FXD,COMPs330K
OHM,5%,0.25W
01121
CB3345
R424 315-0222-00
RES. ,FXD,COMP:2.2K
OHM,5%,0.25W 01121 CB2225
R42S
311-1554-00
RES.,VAR,NONWIR:200K
OHM,20»,0.5bW 73138 91A-20002M
R500 311-1564-00
RES.,VAR,N0NWIR:500
OHM,
20%, 0.
SOW 73138
91A-500R0M
RSOl
321-0222-00
RES.,FXD,FIIM:2K
OHM,1%,0,125W 75042 CEATO-2001F
R502
321-0252-00
RES.,FXD,FIIM:4.12K
OHM,1%,0.125W
75042
CEAT0-4121F
R504
315-0222-00
RES.,FXD,COMP:2.2K
OHM,5%,0.25W
01121
CB2225
R506
315-0102-00
RES.,
FXD,COMP: IK CX1M,5%,0.25W
01121 CB102S
R507
315-0621-00
RES.,FXD,COMP:620
OHM,5%,0.25W
01121
CB6215
R510
315-0822-00
RES.,FXD,COMP:8.2K
OHM,5%,0.25W 01121 CB8225
R512
307-0115-00
RES.,
FXD,COMP:
7. 5 OHM,5%,0.25W 01121 CB75G5
R514 315-0201-00
RES.,
FXD,COMP:
200
OHM,5%,0.25W
01121
CB201S
RSIS
308-0218-00
RES.,FXD,WW:150
OHM,5%,3W 56289 242E1S1J
R520
315-0102-00
RES.,
FXD,COMP: IK OHM,5%,0.25W
. 01121
CB1025
R522
321-0237-00
RES.,
FXD,FILM:
2. 87K
OHM,1%,0.12SW
75042 CEAT0-2871F
R523
321-0226-00
RES.,FXD,FILM:2.21K 0HM,1%,0.125W
75042 CEAT0-2211F
RS25
315-0121-00
RES.,FXD,
COMP:
120
OHM,5%,0.25W
01121 CB1215
R527
315-0121-00
RES.,FXD,COMP:120
OHM,S%,0.25W
01121 CB1215
R532
321-0226-00
RES. ,FXD,FIIM:2.21K
OHM,1%,0.125W 75042 CEAT0-2211F
RS33
321-0237-00
RES.,FXD,FIIM:2.87K
OHM,1%,0.125W 75042 CEATO-2871F
R535
315-0102-00
RES. ,
FXD,COMP: IK C«M,5%,0.25W
01121 CB1025
R537
308-0385-00
RES.,FXD,WW:200
0HM,5%,3W 63743
35326
RS40
315-0622-00
RES.,FXD,COMP:6.2K C»m,5%,0.25W
01121 CB6225
R542 321-0289-00
RES.,FXD,FILM:10K
75042 CEAT0-1002F
R543
321-0289-00
RES.,FXD,FIIM;10K
OHM,1%,0.125M 75042 CEAT0-1002F
R545
315-0102-00
RES. ,
FXD,COMP: IK 0HM,S%,0.25W
01121 CB1025
R546
315-0621-00
RES.,
FXD,
COMP :620
OHM,S%,0.25W
01121 CB6215
R548 315-0822-00
RES.,FXD,COMP:8.2K
OHM,5%,0.25W 01121 CB822S
RS50
307-0109-00
RES.,FXD,C0MP:8.2
0HM,5%,0.25W
01121 CB82G5
SlOO
260-1445-00
SWITCH,
PUSH:
80009
260-1445-00
S110A,B
260-1365-00
SWITCH,
PUSH:
80009
260-1365-00
S200
260-1470-00
SWITCH
,
SLIDE : DPDT
,
0
.
5A
,
12
5V
10389
23-021-309
S220A,B
260-1365-00
SWITCH,
PUSH:
80009
260-1365-00
S225
260-1332-00
SWITCH,
PDSH:1
BUTTON,
MS
71590
2KHB010010-XXX
S230
260-0723-00
SWITCH
,
SLIDE : DPDT
,
0 . 5A
,
12 SVAC 80009
260-0723-00
T380
120-0863-00
XFMP,PWR,SDN
fi:HV 80009
120-0863-00
U200
155-0055-00
MICROCIRCUIT
LI :TRIG SWP 80009
155-0055-00
U310
156-0105-00
MICROCIRCUIT,
LI :OPERATIONAL AMPLIFIER 27014
LM301AN
V415
154-0699-00
ELECTRON TUBE: 80009
154-0699-00
VR280
152-0279-00
SEMICOND DEVICE:ZENER,0.4W,5.1V,5%
07910
1N751A
VR350 152-0283-00
BOlOlOO B029999X SEMICOND
DEVICE:ZENER,0.4W,43V,S%
04713
1N976B
VR352 152-0241-00
BOlOlOO B029999 SEMICOND DEVICE:ZENER,0.4W,33V,5% 04713 1N973B
VR352
152-0357-00
B030000 SEMICOND
DEVICE:
ZENER,
0.4W,
82V,
5% 04713
1N983B
VRSOO
152-0280-00
SEMICOND DEVICE:ZENER,0.4W,6.2V,5% 04713 1N7S3A
2-11
REV.
B AUG
1974
sc
501
MECHANICAL
REPLACEABLE PARTS LIST
PARTS
ORDERING
INFORMATION
Replacement
parts are
available
from
or
through your
local
Tektronix, Inc.
Field
Office or
representative.
Changes to
Tektronix
instruments
are sometimes
made
to
accommodate
improved
components as
they become
available,
and
to give you
the benefitofthe
latest circuit
improvements
developed in
our
engineering
department.
It
is
therefore
important,
vi/hen
ordering parts, to
include the
following
information
in your
order; Part
number, instru-
ment type
or
number,
serial
number, and
modification
number if
applicable.
If
a
part you
have
ordered has
been replaced
with
a
new
or
improved part,
your
local
Tektronix, Inc.
Field
Office or
representative
will contact
you
concerning
any change in
part
number.
Change
information, if
any, is
located
at
the rear of this
manual.
SPECIAL
NOTES AND
SYMBOLS
XOOO
Part
first added at
this serial number
OOX
Part
removed
after this
serial
number
FIGURE
AND INDEX NUMBERS
Items in this
section
are referenced
by
figure and index
numbers
to
the illustrations.
INDENTATION SYSTEM
This mechanical parts
list
is indented to irxficate
item
relationships. Following is an example of the
indentation
system
used in the description column.
1
2
3 4 5
Name
&
Description
Assembly and/or
Component
Attaching parts
for
Assembly and/or Component
Detail
Part of Assembly
and/or
Component
Attaching
parts
for Detail Part
«
Parts of Detail Part
Attaching parts for Parts of
Detail
Part
Attaching
Parts
always
appear
in the same indentation as
the item
it
mounts,
while the detail parts are irxlented
to
the right. Irxlented items
are
part of,
and included with,
the
next
higher indentation.
The separation symbol
*
irxlicates
the end
of
attaching
parts.
Attaching
parts
must be purchased separately,
unless
otherwise specified.
ITEM NAME
In the Parts List,
an
Item
Name
is separated from the
description by a
colon
(:).
Because of
space limitations,
an
Item
Name
may sometimes appear
as
incomplete.
For
further
Item Name
identification,
the
U.S.
Federal
Cataloging
Handbook
H6-1 can be
utilized
where
{possible.
2-12
Mechanical Parts List—SC 501
ABBREVIATIONS
"
INCH
FLH PLAT HEAD
PWR
POWER
f
NUMBER
SIZE
PLTR FILTER
RCPT
RECEPTACLE
actr ACTUATOR
FR FRAME or
FRONT
RES
RESISTOR
ADPTR ADAPTER
PSTNR FASTENER
RDG
RIGID
ALIGN
alignment
FT
FOOT
RLF
RELIEF
AL
ALUMINUM
FXD
FIXED
RTNR
RETAINER
ASSEH
ASSEMBLED
GSKT GASKET
SCH
SOCKET
HEAD
ASSY
ASSEMBLY
HDL
HANDLE
SCOPE
OSCILLOSCOPE
ATTEN
ATTENUATOR
HEX
HEXAGON
SCR
SCREW
AWG
AMERICAN
WIRE GAGE HEX HD
HEXAGONAL
HEAD SE
SINGLE END
BD
BOARD
HEX SOC
HEXAGONAL SOCKET
SECT
SECTION
BRKT
BRACKET
HLCPS
HELICAL
COMPRESSION
SEMICOND
SEMICONDUCTOR
BRS
BRASS
HLEXT
HELICAL EXTENSION
SHLD
SHIELD
BRZ
BRONZE
HV HIGH VOLTAGE
SRLDR
SHOULDERED
BSHG BUSRING
IC INTEGRATED
CIRCUIT
*
SKT
SOCKET
CAB
CABINET
ID
IVSIDE
DIAMETER SL
SLIDE
CAP
CAPACITOR
IDENT
IDENTIFICATION
SLFLKG
SELF
-LOCKING
CER
CERAMIC
IMPLR
IMPELLER
SLVG
SLEEVING
CHAS
CHASSIS
IN INCH
SPR
SPRING
CKT
CIRCUIT
INCAND INCANDESCENT
SQ
SQUARE
COMP
COMPOSITION
INSUL
insulator
SST
STAINLESS
STEEL
CONN
CONNECTOR
INTL INTERNAL
STL
STEEL
COV
COVER
LPHLDR
LAMPHOLDER
SW
SWITCH
CPLG
COUPLING
MACH
MACHINE
T
TUBE
CRT CATHODE
RAY TUBE
MECH MECHANICAL
TERM
TERMINAL
DEG
DEGREE
MTG MOUNTING
THD
THREAD
DWR
DRAWER
NIP NIPPLE
THK
THICK
ELCTRN
ELECTRON
NON WIRE
NOT
WIRE WOUND
TNSN
TENSION
ELEC
ELECTRICAL
OBD ORDER BY
DESCRIPTION
TPG
TAPPING
ELCTLT
ELECTROLYTIC
OD OUTSIDE
DIAMETER
TRH
TRUSS
HEAD
ELEM
ELEMENT
OVH OVAL HEAD
V
VOLTAGE
EPL
ELECTRICAL PARTS LIST
PH BRZ
PHOSPHOR BRONZE
VAR
VARIABLE
EQPT EQUIPMENT
PL
PLAIN or
PLATE
w/
WITH
EXT
EXTERNAL
PLSTC
PLASTIC
WSHR
WASHER
FIL
FILLISTER HEAD
PN
PART NUMBER
XFMR
TRANSFORMER
FLEX
FLEXIBLE
PNH
PAN
HEAD
XSTR
TRANSISTOR
CROSS
INDEX MFR. CODE
NUMBER TO
MANUFACTURER
MFR.CODE
MANUFACTURER
ADDRESS
CITY.STATE.ZIP
00779
AMP, Inc.
P. 0.
Box 3608
Harrisburg,
PA 17105
01295
Texas
Instruments, Inc.,
Components
Group
P. 0. Box
5012
Dallas,
TX
75222
10389 Chicago
Switch, Inc.
2035
Wabansia Ave.
Chicago, IL
60647
22526 Berg
Electronics, Inc.
Youk
Expressway
New Cumberland,
PA
17070
24931 Specialty
Connector
Co.,
Inc.
3560 Madison
Ave.
Indianapolis,
IN
46227
45722
USM Corp.,
Parker-Kalon Fastener
Div.
1
PeeRay
Drive
Clifton,
NJ
07014
71159
Bristol
Socket
Screw,
Div.
of
American Chain
and
Cable Co., Inc. P. 0. Box
2244
Waterbury,
CT
06720
71590
Centralab
Electronics, Div.
of
Globe-Union,
Inc.
5757
N.
Green Bay
Ave.
Milwaukee,
WI
53201
73743
Fischer
Special Mfg. Co.
446 Morgan St.
Cincinnati,
OH
45206
74445
Holo-Krome Co.
31 Brook St.
West
Hartford,
CT
06110
78189
Illinois Tool
Works,
Inc.
Shakeproof
Division St.
Charles
Road
Elgin,
IL
60126
79807
Wrought
washer Mfg.
Co.
2100 S. 0 Bay St.
Milwaukee,
WI
53207
80009
Tektronix, Inc.
P. 0. Box 500
Beaverton,
OR 97005
82647 Texas
Instruments,
Inc.
Control Products
Div.
34 Forest St.
Attleboro,
MA 02703
85385
Central
Screw Co.
2530
Crescent
Dr.
Broadview,
IL 60153
85471 Boyd, A. B.,
Co.
1233
Howard
St.
San
Francisco,
CA
94103
2-13
Mechanical
Parts
List—
SC
501
FIGURE
1
EXPLODED
Rg. &
Index
Tektronix Serial/Model No.
Mfr
No.
Port
No.
Eff
Osconf
i34 s
Nome
& Deicription
Code Mfr
Port
Number
1-1 337-1399-00 2
SHLD , ELECTRICAL
:
S IDE
80009 337-1399-00
-2 366-0494-00
3
KNOB: GRAY
WITH
SETSCREW
80009 366-0494-00
-
.
EACH KNOB INCLUDES:
213-0153-00 1
.
SETSCREW:5-40
X 0.125 INCH, HEX
SOC
STL 74445
OBD
-3
366-1173-03 2 KNOB : CHARCOAL
,
W/SETSCREW
80009
366-1173-03
-
.
EACH KNOB
INCLUDES:
213-0239-00 1
.
SETSCREW:3-48
X 0.062 INCH, STL
71159 OBD
-4
366-1257-27
1
PUSHBUTTON:
GRAY,AC COUP
80009
366-1257-27
-5
366-1257-54 1 PUSHBUTTON : GRAY
,
10
OMV
80009
366-1257-54
-6
366-1257-55
1
PUSHBUTTON
: GRAY
,
IV
80009
366-1257-55
-7
366-1257-87 1 PUSHBUTT0N:GRAY
, XIO
80009
366-1257-87
-8
366-1402-41
1 PUSHBUTTON
:
GRAY
, XI0
80009
366-1402-41
-9
366-1422-01 1 KNOB: LATCH
80009
366-1422-01
-10 214-1840-00 1 PIN, KNOB SECRG:
80009
214-1840-00
-11
366-1489-74
1
PUSHBUTTON : GRAY
,
MS
80009
366-1489-74
-12 426-0681-00
6
FR.PUSH
BUTTON:GRAY PLASTIC
80009
426-0681-00
-13 384-1114-02
2 EXTENSION SHAFT:
80009
384-1114-02
-14 220-0633-00
1
NUT,
PLAIN,
KNURL:0.
50-28
X 0.25 INCH,BRS
80009 220-0633-00
-15 355-0170-00
1
STUD,BDG POST:6-32
X
0.40
INCH LONG
80009
355-0170-00
-16
131-0955-00 1
CONNECTOR
,
RCPT
,
: BNC
,
FEMALE
24931
28JR200-1
-17 2
RES,VAR, NONWIRE:
(SEE
R2104R225 EPL)
(ATTACHING PARTS)
-18 210-0583-00
2
NUT, PLAIN, hex.
:0.
25-32
X
0.312 INCH,BRS
73743
2X20319-402
-19 210-0940-00
2
WASHER,FLAT: 0.2
5 ID X
0.375 INCH
OD,STL
79807
OBD
-20
358-0378-00 2
BUSHING, SLEEVE:
PRESS MOUNT
80009
358-0378-00
-21 260-1470-00
1
SWITCH , SLIDE : DPDT
, 0 .
5A ,
12SVAC
10389 23-021-309
-22
1
RES,
VAR: (SEE
R130
EPL)
(ATTACHING
PARTS)
-23 210-0583-00
1
NUT,
PLAIN, HEX.
:
0.25-32
X 0.312
INCH,BRS
73743
2X20319-402
-24
210-0940-00
1
WASHER, FLAT:
0.2
5 ID X
0.375 INCH OD,STL 79807
OBD
-25
333-1890-00
1
PANEL,
FRONT:
SC 501
80009
333-1890-00
-26
214-1513-01
1
LCH,
PLUG-IN
RET:
80009 214-1513-01
(ATTACHING
PARTS)
-27
213-0254-00 1
SCR,TPG,THD
CTG:2-56X0.25"100
DEG,FLH STL 45722
OBD
-28
200-0935-00 1
BASE,
LAMPHOLDER;
0.2
9 OD
X
0.19"
L,BK PLSTC
80009
200-0935-00
-29
378-0602-00
1
LENS , L
IGHT :
GREEN
80009
378-0602-00
-30
352-0157-00 1
LAMPHOLDER:
WHITE PLASTIC
80009 352-0157-00
-31
200-1555-01
1
BEZEL,
CRT:
80009
200-1555-01
(ATTACHING
PARTS)
-32
211-0101-00
2
SCREW,MACHINE:4-40
X
0.25"
100 DEG,FLH
STL 83385 OBD
-33
386-2641-01
1
SUBPANEL
,
FRONT : PLASTIC
80009
386-2641-01
(ATTACHING
PARTS)
-34
213-0229-00
3
SCR,TPG,THD.
FOR:6-20X0.375
100 DEG,FLH
STL
83385 OBD
-35
337-2026-00 1 SHIELD, ELEC:
REAR
SUBPANEL
80009 337-2026-00
-36
384-1216-00 1
EXTENSION
SHAFT:
6.
375 INCH
LONG
80009
384-1216-00
-37
384-1217-00 1
EXTENSION
SHAFT:
8.
4 5 INCH
LONG
80009
384-1217-00
-38
384-1099-00 2
EXTENSION
SHAFT:PUSH BUTTON, 1.54
INCH
LONG
80009
384-1099-00
-39
354-0423-00 1 RING ,
SPRT
,
CRT :
RUBBER
80009
354-0423-00
-40
348-0279-00 1 CUSHION, CRT:
85471
OBD
-41
337-1458-03
1
SHLD, ELECTRON
T:
80009
337-1458-03
(ATTACHING
PARTS)
-42
211-0101-00
1
SCREW,MACHINE:4-40
X
0.25’
100 DEG,FLH STL
83385 OBD
-43
136-0611-00 1
SKT,ELCTRN
TUBE:
.
SKT,
ELECTRON
TUBE ASSEMBLY INCLUDES:
.
SKT,ELCTRN
TUBE:
80009
136-0611-00
136-0453-00 1
80009
136-0453-00
131-1109-00 10
.
CONTACT,
ELEC:
00779
42869-6
-44
343-0403-00
1
CLAMP,
XSTR:
80009
343-0403-00
(ATTACHING
PARTS)
-45
211-0114-00
1
SCREW,
MACHINE
:4-40
X 0.438
INCH
L,FLH STL 83385 OBD
-46
342-0082-00 1 INSULATOR PL;
80009
342-0082-00
*
0
2-14
Mechanical Parts
List—
SC 501
FIGURE
1
EXPLODED (CONT)
Fig. &
Index
Tektronix
Seriol/Model
No. Mfr
No.
Port
No. Eff Dscont
1 I 3 4 s
Nome &
Description
Code
Mfr Port Number
X-47
214-1061-00
1
SPRING
,
GROUND
:
FLAT 80009
214-1061-00
-48
426-1022-00
1 FR SECT, TOP: 80009
426-1022-00
(ATTACHING PARTS)
-49
213-0146-00
1 SCR,TPG,THD FOR:6-20
X
0.313 INCH,PNH
STL
83385
OBD
-50
426-1047-00
1 FR SECT, BOTTOM: 80009
426-1047-00
(ATTACHING
PARTS)
213-0146-00
1
SCR,TPG,THD
FOR:6-20 X 0.313 INCH,PNH STL 83385
OBD
-51
337-1839-00
1 SHIELD, ELEC:HI VOLT, RIGHT
80009
337-1839-00
(ATTACHING
PARTS)
-52
211-0008-00
1
SCREW,
MACHINK:
4
-40
X
0.25 INCH,PNH
STL 83385
OBD
-S3 210-0994-00
1
WASHER,
FLAT:0. 125 ID
X
0.25"
OD,STL
83385
OBD
-54
337-1842-00
1
SHIELD,
ELEC:HIVOLT, LEFT 80009
337-1842-00
(ATTACHING PARTS)
-55
211-0144-00
1
SCREW,MACHINE:4-40
X 01.312 INCH L,PNH STL
83385
OBD
-56
210-0994-00
1 WASHER,FLAT: 0.125
ID X
0.25"
OD,STL
83385 OBD
-57
361-0581-00
1
SPACER, SLEEVE:
0.25 OD
X
1.044 INCH
LONG
80009
361-0581-00
-58
129-0419-00
1
POST,ELEMCH: 80009
129-0419-00
-59
1
CRT
BOARD
ASSY:
(SEE A1 EPL)
-
.
CRT BOARD
ASSY
INCLUDES:
-60
131-0608-00
8
.
CONTACT,
ELEC: 0.365 INCH LONG
22526
47357
-61
136-0252-04
15
.
SOCRET,PIN CONN:0.188
INCH
LONG
22526
75060-001
-62
136-0260-02
1 . SOCRET,SEMICOND:16
CONTACT, LOW
CLEARANCE
01295 C931602
-63
214-0579-00
1
.
TERM.,
TEST PT:0.40 INCH LONG
80009
214-0579-00
-64
214-0973-00
1 .
HEAT
SINR,ELEC:
0.28 X 0.18
OVAL X 0.187"H
80009
214-0973-00
-65
260-0723-00
1 .
SWITCH,
SLIDE :DPDT,0.5A,
12
5VAC
80009
260-0723-00
-66
260-1332-00
1
.
SWITCH,
PUSH :1 BUTTON
71590
2RAB010010-XXX
-67
361-0542-00
2
.
SPACER,
SWITCH -.PLASTIC
71590
J-64281
-68
337-1838-00
1 . SHIELD, ELEC:
PUSHBUTTON
80009
337-1838-00
-69
260-1445-00
1 . SWITCH,
POSH:
80009
260-1445-00
361-0542-00
2
. SPACER, SWITCH:
PLASTIC
71590 J-64281
-70
260-1365-00
2
. SWITCH,
PUSH:
80009
260-1365-00
-71
337-1837-00
1
.
SHIELD,
ELEC: PUSHBUTTON
80009
337-1837-00
-72
376-0051-01
4
.
CPLG,
SHAFT,FLEX: FOR 0.125 INCH
80009
376-0051-01
-
.
.
COUPLING,
SHAFT,FLEXIBLE INCLUDES:
354-0251-00
2
.
.
RING, COUPLING:
80009
354-0251-00
376-0049-00
2
. .
CPLG, SHAFT,
FLEX:
PLASTIC
80009
376-0049-00
213-0048-00
4
. .
SETSCREW:4-40
X
0.125 INCH HEX
SOC STL
74445
OBD
-73
3
.
RES,VAR,NONWIR:
(SEE R405
EPL)
-74
1 .
RES,VAR,NONWIR:
(SEE R145,R275 £
R330 EPL)
(ATTACHING PARTS)
-75
210-0583-00
3 .
NOT, PLAIN, HEX.
:
0.25-32 X 0.312
INCH,BRS 73743
2X20319-402
-76
210-0046-00
3 .
WASHER,LOCR:1NTL,0.26 ID
X
0.40"
OD,STL
78189
1214-05-00-0541C
-77
337-1840-00
1 .
SHIELD, ELEC: POT
MTG
80009
337-1840-00
-78
1 CRT BOARD ASSY: (SEE A2 EPL)
-
.
CRT BOARD ASSY
INCLUDES:
-79
136-0252-04
6 . SOCRET,PIN CONN:
0.188
INCH LONG
22526
75060-001
-80
136-0514-00
1 . SOCRET,SEMICOND:MICROCIRCUIT,8
CONTACT
82647
C930802
(ATTACHING PARTS)
-81
210-0406-00
1
NOT, PLAIN,HEX.
-.4-40
X
0.188 INCH,BRS
73743 2X12161-402
-82
211-0144-00
1
SCREW,MACHINE:4-40
X 1.312 INCH
L,PNH STL
83385
OBD
-83
213-0336-00
1 SCR,TPG,THD FOR:6-32
X
1.25 INCH.PNH STL
83385
OBD
-84
361-0671-00
2
SPACER, SLEEVE:
0.18 9 OD jC 1.06
INCH
LONG 80009
361-0671-00
2-15
®
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
CALIBRATION
ADJUSTMENTS
7.
Trigger Balance R186
Attach
probe of test oscilloscope to
junction
of
R200,
C200
and connection
to
trigger selector
switch.
Using
the
test
oscilloscope as a
dc voltmeter,
adjust
R186
for
a
reading of +50
mV. Apply
a
50 mV,
1 kHz
square wave from the
Amplitude Calibrator to the VERT
IN-
PUT
connector of the
SC 501 . Measure
the peak-to-peak
amplitude.
Displayed
signal
on
the test oscilloscope should
be
a
square wave
with
a peak-to-peak
am-
plitude not less than
2.8
volts nor
more
than 4.2
volts.
Remove test oscilloscope
probe
from
SC
501
.
8.
Vertical
Gain
(XI) and vertical
VARIABLE range
(X10)
With 50 mV square
wave still applied,
adjust
SC 501
LEVEL/SLOPE control
for
stable display.
Set vertical
VARIABLE to
XI
and
adjust
R172
(Vert Gain) for
a
display
amplitude of
exactly
5
major divisions.
Set vertical
VARIABLE to
X10. Apply
500 mV
square
wave
from
Amplitude
Calibrator.
Adjust
R132 (X10 Cal) for
a
display
amplitude
of exactly
5 major divisions.
Remove Amplitude
Calibrator signal.
Set
vertical
VARIABLE to XI.
9.
Normalize
(10 mV/div) input time
constant
Attach Input
Normalizer
(47 pF) to
VERT INPUT connector.
Set SC 501
controls to 10
mV/div, vertical
VAR-
IABLE to
XI. Apply
100 mV,
1kHz
square wave from
Amplitude Calibrator
to
Input Normalizer.
Adjust
Cl 17
for
best displayed
square wave
(flat
top and
square
corners)
on
SC
501
crt.
Remove
Input Normalizer from
circuit.
10.
Normalize
(100 mV/div)
input
time
constant
Set
SC
501
to
lOOmV/div.
Apply
500 mV, 1 kHz
square wave
from
Ampli-
tude Calibrator
directly
to
VERT
INPUT
of
SC
501
.
Check
for
displayed
ampli-
tude
of 4.85
to
5.15 major
divisions.
Adjust
Cl
12 for
best dispiayed
square
wave. Insert
Input
Normalizer
between
VERT INPUT
connector
and
Amplitude
Calibrator.
Apply
1
V, 1 kHz
square
wave
to Input
Normalizer.
Adjust
Cl
10
for
best displayed
square
wave.
Remove
Input
Normalizer
from circuit.
11.
Normalize
(1
V/div)
input time
constant
Set SC 501
controls
to 1 V/div.
Apply
5
V, 1 kHz
square wave from
Amplitude
Calibrator directly
to
VERT
INPUT connector.
Check for displayed
amplitude
of 4.85
to 5.15 major
divisions.
Adjust
C104
for
best displayed
square
wave. Insert
Input Normalizer
between
VERT INPUT connector
and
Amplitude
Calibrator.
Apply
10 V,
1 kHz
square wave
to Input Normalizer.
Adjust 0102 for
best displayed
square
wave.
Remove Input Normalizer
from
circuit.
Set
SC 501
controls
to
10 mV/div;
dc coupled (all vertical
push-
buttons
OIJT).
12.
Check vertical
bandwidth
Terminate
VERT
INPUT connector
of
SC
501
with
50-ohm
termination.
Set all
SC
501 vertical
pushbuttons
to
OUT
position
(lOmV/div;
decoupled).
a.
Apply
50
kHz
reference
signal
frequency
from Leveled
Sine-Wave
Gen-
erator to 50-ohm termination
and adjust
output for
a
displayed
amplitude of
6.0
major divisions. Set Leveled
Sine-
Wave
Generator frequency
to
5
MHz.
Displayed amplitude
must be
greater
than
4.2 major divisions.
b.
Repeat step
12a
with
SC
501
set
for
100
mV/div.
c.
Repeat step
12a
with
SC 501 set
for
1 V/div. Use
5.0
major divisions
of
displayed amplitude
at the
50
kHz refer-
ence frequency. Displayed amplitude
at
5
MHz must
be
greater than
3.5 major
divisions.
HORIZONTAL
SYSTEM
NOTE
Refer
to POWER SUPPLY
8< CRT
(steps 1-5) befor performing
any
horizontal
system adjustments.
Be
certain
that the power supply and
crt voltages are within their
listed
tolerance and
that
all
controls on
the
SC 501
have
been
set to their
preliminary
settings.
13.
Check Time/div accuracy
Apply appropriate
time
marks from
Time-Mark Generator to
VERT INPUT
connector
on
SC 501
.
Adjust
SC 501
controls
so
that second marker
is
on the
second vertical
graticule line. Check for
proper
timing
over the
.
center eight
division portion of
the
sweep
for each
Time/div setting.
Disregard the first
0.5
microsecond
of total sweep length.
Time
SC
501
Marks Time/div
1 ms 1 ms/div
10 ms 10 ms/div
100 ms 100 ms/div
1ms 1
Ms/div
10
ms
10
Ms/div
100
ms
100
MS/div
Tolerance
The second
through tenth
time
marks dis-
played
for
each
Time/div setting must be
aligned
with its associated
vertical graticule
line
within ±2
minor
divisions
(5%
of eight
divisions).
14.
Check
X5
Magnification
Apply
500 microsecond markers
to
SC 501
at 1 ms/div. Pull time
base
VARIABLE control
out (X5). Five-
division
spacing
between two time marks
indicates
X5 magnification. Push time
base
VARIABLE
in
and set to
XI
position.
15.
Check time base
VARIABLE range
Apply
10
millisecond
time marks to
SC
501
at 1 ms/div.
Set
time
base VAR-
IABLE to X10
position.
One time mark
per
division indicates
a
10:1 range.
Re-
turn time
base VARIABLE
to XI
position.
16.
Adjust
basic timirrg
Apply one millisecond time marks
to
SC 501
at 1 ms/div.
Adjust
R265
(Hor-
izontal
Gain
XI)
on Auxiliary board for
nine’
divisions of horizontal deflection.
Adjust
R212
(Sweep
Adj) to
display
a
total of eleven time marks.
Readjust
R265
for
one time mark per major
division on the
SC 501 .
of
two time marks per
five major
divisions. Position
display horizontally
from full left
to
full
right. Signal lin-
earity
must
remain
within
±2
minor
divisions. Return horizontal
POSITION
control
to
midrange.
Push time
base
VARIABLE control in and
set to
XI
position.
18. Adjust
time
base VARIABLE range
Apply 10 millisecond time marks
to
SC
501
at 1 ms/div. Set time base
VAR-
IABLE to
’XIO position.
Adjust
R226
(Sweep XIO Cal) for
a
display of one
time mark per
major
division
on the
SC 501
.
Return time
base VARIABLE
to X
1
position.
19.
Check Trigger functions
Connect
time marker output from
the Time-Mark Generator to VERT IN-
PUT
of
SC
501 and
trigger
output
from
Time-Mark Generator to EXT
TRIG
pin
jack of
SC
501
. Set
SC
501
trigger
source to EXT
arid triggering
mode to
AUTO. Set SC
501 time
base
for
1
ms/div.
Set
time marks and triggers
from Time-Mark Generator for 1 milli-
second.
Adjust LEVEL/SLOPE
control
for
a
stable display on
SC
501 Keeping
marker
output
of Time-Mark Generator
at 1
millisecond: select in sequence,
10
millisecond, 0.1 second, and
1
second
triggers from Time-Mark Generator.
SC
501 display should not
be
stable for
1
second triggers in
AUTO
mode. Push
LEVEL/SLOPE
control in and check for
a
stable display with
1
second triggers.
Adjustment of LEVEL/SLOPE
control
may be
necessary.
20.
Check
+
Gate
Out
Set SC 501
time
base
for
1
ms/div.
LEVEL/SLOPE
out (AUTO). Trigger
source to INT. No
signals applied. Using
test
oscilloscope, check
+
Gate Out
for
a
10
millisecond rectangular pulse. Ampli-
tude
limits:
7.7
volts
to 8.7
volts.
21.
Adjust Ramp
Out
With
SC
501
controls
set
the same
as
for step
8,
attach probe
of
test
oscillo-
scope to
pin
15B
at
rear
interface
con-
nector. Using
test oscilloscope
as a
volt-
meter adjust
R245 (Ramp
Gain)
for
a
10 V
peak-to-peak signal. Adjust R235
(Ramp Zero)
for signal level to start at
a
zero volt
dc
level.
22.
Adjust
External
Gain
Set
SC
501
Ext Horiz (X-Y) selector
switch,
S230,
toward
rear of instrument.
Adjust INTENSITY
for visible
dot on
crt
of
SC 501 .
Position
dot
to first vertical
line on left side of screen and centered
vertically. Apply
a
1 V,
1 kHz
square
wave
from Amplitude
Calibrator to
EXT
HORIZ
pin jack on
SC
501
.
Adjust
R300
(Ext Gain)
for
10 major
divisions
of horizontal
deflection
(lOOmV/div).
NOTE
AFTER
COMPLETION
OF STEPS
16THROUGH
18,
REPEAT
STEPS
13
THROUGH
15,
MANUAL CHANGE
INFORMATION
TEKTRONIX®
to
t0ChnicMt
CHANGE:
PRODUCT
EFF SN
B040250-UP
CHANGE
REFERENCE
DATE
9-10-74
DESCRIPTION
M22,921
ELECTRICAL PARTS
LIST
AND
SCHEMATIC
CHANGES
CHANGE- TO:
R165
308-0349-00
RES.,FXD,WW:3.6K
OHM,
1%,
3W
R167
322-0205-00
RES.,FXD
Fim:1.33K OHM,
U,
0.25W
R176
322-0205-00
RES.,FXD,FI1M:1.33K OHM,
17.,
0.25W
R178
308-0349-00
RES.,FXD,WW:3.6K
OHM,
17.,
3 W
PAGE
1
OF
1
TEKTROryiX®
committed to
technical excellence
MANUAL CHANGE INFORMATION
PRODUCT
SC
501
CHANGE
REFERENCE
Cl/1074
DATE
10-8-74
CHANGE:
DESCRIPTION
070-1700-00
CALIBRATION ADJUSTMENTS
Step 21
Adjust
Ramp Out
CHANGE TO READ:
With
SC 501 controls set
the
same as for
step
8,
attach
probe of test oscilloscope
to
pin
15A
at rear interface
DIAGRAM
INPUT & VERT AMP
C120
sh
be
0.01
pF
PAGE
1
OF
1
MANUAL
CHANGE
INFORMATION
TEKTHOIMIX’
sr SOI
PRODUCT
CHANGE
REFERENCE
C2/1-75
PH
to
lochnicsl
oxceltenco
1
'
070-1700-00
DATE
1-7-75
CHANGE:
DESCRIPTION
CALIBRATION
ADJUSTMENTS
Step
10
CllANCi;: AJiust C112 to
read:
"Adjust
C104”
CllANCn:;
Adjust
CllO to
read:
"Adjust
C102"
Step 11
CHANGE:
Adjust
C104
to
read:
"Adjust
Cl
12"
CHANGE;
Adjust
C102 to
read:
"Adjust
CllO"
INTERCHANGE: Circuit Board
Step
(circled) Notations
10
and
11,
PAGE
1
OF
1
MANUAL
CHANGE INFORMATION
PRODUCT
_S_C
5Q1
EFF
SN
B050560-U-
CHANGE
REFERENCE
^^3,539
DATE
7-17-75
CHANGE:
DESCRIPTION
070-1700-00
ELECTRICAL
PARTS LIST
AND SCHEMATIC
CHANGES
CHANGE
TO:
A1
670-3304-02
CKT
BOARD
ASSY:MAIN
C154
281-0637-00
CAP.
,FXD,CER DI:91
PF,
5%,
500V
(C154
is
located
on
diagram
1
INPUT &
VERT AMP)
PAGE OF
IMPUT
COUPLIUG,
ATTEKJUATOR.
XI XIO
XlOO
VER.-TIC.AI_
PR-EeaMP
QI20>
<5125
QI
|^5
EMITTER
FOU-OWERS
Ql
4
a
<au.o
^
VERTICAL
OUTPUT
Qiao (3IUT
QlS8 Q|T<0
QK«4 QI7S
VARIA&UE
TRIGiCiER
AMPUIPIEP.
G5184
ai40
!
MULTIPLIER
5270
I
S2 2&
RAMP
amplifier.
Q
240
0250
*KT
9X00
I
i.Eveu/si.ope
SOUR.ce
FOL. LOWER-
SV^EEP
GENERATOR
HORIZONTAL
amplifier
Q2SZ
Q28E
Q.Z10
Q
2HO
Z AXIS
amplifier
asiE.
Gisau
GiaRO
QS
4
E
as
4
S
MI<^H
VOLTA<^E
SUPPLIES
Q
850
SlSTO
Q.3C>0
Q3SO
S134E.
T3SO
+
L5 VOUX5
PIN
A
CRT
SEXTUPLER
P«0
VOL-fS
EXT
HORIZ.
E XTERNAL
HORIZONTi^L
AMPLIFIER
aaos
U
3
IO
|ikixen'»itY
LOW
VOLTAIRE
SUPPLIES
GJSOO
QEtO
as20
0525
ZO VOLTS
8.Z VOLTS
QSSO 053
S
S.2
VOLTS
GtS-AO
SS4
S
*0
VOLTS
Block. Diag^ram
ozta
Servicing
Information-
SC
501
INPUT
AND
VERTICAL
AMPLIFIER
CIRCUIT
DESCRIPTION
Input
Attenuator.
The input attenuators
allow
a
choice
of
either XI.
X10,
or X100
attenuation
of the input
signal,
which
is ac- or
dc-coupled
by
the
selected
position of SI 00.
C112
and
C104
allow the
XIO
and
X100
attenuation
networks to
be
frequency compensated. C117,
C110,
and
Cl 02
allow the
attenuation
networks
to
be normalized
for
a
time
constant
of
47 microseconds.
Preamplifier. The
preamplifier stage
employs a
dual field
effect
transistor.
Q120,
to
provide
a
high input
impedance.
Q120B
acts as a
constant-current source
for
Q120A.
Q125
and Q135
circuitry
operates as a
paraphase
amplifier. Q148
and
Q160
operate as
emitter-followers to
provide a
low-
impredance drive to
the
following stages.
Quiescently,
the
two
sides of the
paraphase
amplifier are
balanced
by
the
adjustment of R142 so
that there is no
current
through
the
gain-setting
resistor, R129,
when
the VARIABLE
control
is
fully
clockwise.
The input stages
are
diode clampred by
CR121
and
CR125,
protecting
the input stages
against
negative-going
over-drive
signals.
R130
(VARIABLE
con-
trol)
provides an adjustable
attenuation
factor other than
the
fixed
calibrated values set by
the input attenuators
and
the XI
position
of
R130.
Output
Amplifier. A
push-pull
signal is developed
at
the
emitters of Q148
and
Q160,
along
with
a
dc positioning
voltage
from R145
(vertical POSITION
control). The
gain
of
the
push-pull
amplifier,
consisting
of
0150, 0158,
0167,
and
0176,
is controlled by
Gain
adjustment R172.
The
output
stage, 0165
and
0178,
with their associated
components
is
a
balanced
grounded-base
amplifier
circuit
which is
protected
from over-drive
signals
by
clamping
diodes, CR165
and
CR178.
Trigger Takeoff.
The
trigger takeoff
amplifier,
0184
and
0190,
with their
associated
components,
develops the
internal
signal
to
trigger
the
sweep
generator. The
gain of
this
stage is about
seven.
Servicing
Information— SC
501
SWEEP
AND
HORIZONTAL AMP CIRCUIT DESCRIPTION
Trigger. Integrated circuit
U200
is a
combination
Trigger/Sweep Generator.
The Trigger
portion (input pin
13)
derives
trigger pulses
from
a
sample of the Vertical
Amplifier signal, or
from
an
applied
to
the
EXT
TRIG
pin jack. CR200 and CR201
limit the amplitude
swing
of
the trigger
signals.
C204
is the
differentiating
capacitor
for
the
trigger pulses. LEVEL/SLOPE control is
provided
by a
voltage
applied
to
pin 14 from R210. No
trigger signals can start
the sweep
generator system until
sweep
hold-off period has been
completed. The sweep
hold-off
F>eriods
(pin
3)
are
determined by the RC time
constants of
R215, C218,
and
C220.
The
timing period for
the
AUTO
triggering mode is
determined
by
the
time
constant
of R205 and C205
if
no
voltage is
applied
to
pin
10
through
S205.
For
normal
triggering,
approximately
—6
V
is
applied
to
pin 10 through S205.
Sweep
Generator. The Sweep
Generator
portion
of
U200
produces two output
signals; the sweep ramp voltage
on pin
4 and
crt
unblanking gate on
pin 16.
The
sweep is
generated
by
a feedback
operational
amplifier integrating
circuit. The slope of the ramp
is controlled by
fixed
RC
time
constants selected
by
the Tlme/div
pushbuttons.
CR215
provides
a
low
impedance discharge path
for
the
sweep
capacitors. Sweep
length is
controlled
by a
voltage
applied
to
pin
6
from R212
(Sweep Adjust).
Sweep
VARIABLE
control, R225,
controls
the charging
current
to
the
sweep
(integrating)
capacitors
and when
varied changes
the slope of the ramp at
pin 4.
Horizontal Amplifier.
Sweep
ramp voltages
or
signals
from the
EXT HORIZ pin jack
are applied
to the base of
Q252.
The circuit containing
Q252 and
Q270 is
an
emitter-coupled paraphase
amplifier
with
a
horizontal
POSITION
control voltage applied
to
the
base of
0270
and
R275.
In
the
magnified
mode,
emitter degeneration is
reduced, resulting in
a X5
increase
in
gain.
Clamping diodes,
CR280
and
CR282
limit
the positive
excursions of the
signals
at the bases
of
Q285
and
0290 to about
—3
V as set
by
Zener diode,
VR280.
Push-pull signals
are developed
at
the collectors of
Q285
and
0290 to drive the horizontal
deflection plates of the crt.
Ramp Out. The
Ramp
Out
feedback
amplifier circuit,
0240 and
0250,
produces
a
zero
to
-HO
V
ramp or an
amplified and
inverted version of signals from the EXT
HORIZ
pin jack to
the rear connector pins.
The feedback
arrangement
allows the
emitter of
0250 to
be
set
to a
zero
volt dc
level, and produces a
low
output
impedance without
causing 0240 to go
into saturation.
External Horizontal Amplifier.
The External Horizontal
Amplifier circuit is an operational amplifier configuration,
U310,
fed
by
buffer amplifier
0305.
The gain
of U310 is
fixed
at about
six
by
R310 and R305.
R300
controls the
external
signal amplitude
to
the
gate of
O305A.
80TM
OUT
XI
1
XJOOl
Ixiol
S115
I
yn
S
out;
T T
T
IZOWT-^L AMPUlFiEfa-
^
oi
Ol
Servicing
Information—SC 501
Z-AXIS
AND CRT
CIRCUIT
DESCRIPTION
Z-Axis
Amplifier
and
+
Gate Out.
The Z-axis amplifier is
a
shunt-feedback
operational
amplifier with
a
voltage
output.
The
amplifier consists of
Q336, Q348,
and Q345.
The
feedback path is
from the collectors
of
Q345-Q348
through C339-R339
to
the
summing point at the base of
Q336.
Q345 and Q348
are connected as
a
complementary
amplifier to provide a
fast
risetime signal
while
consuming
minimum
quiescent power. Q345 acts as a
pull-up
transistor
and
Q348
acts
as
the
pull-down transistor for the amplifier.
The
output voltage
from the
amplifier provides
the
drive
signal
to
control the
crt intensity
level
through the
control-grid supply.
Emitter-follower
Q315,
acts as
a
buffer
amplifier
for the
Z-axis
amplifier
and
+
Gate Out
circuits.
The negative-going
unblanking gate
at
the
emitter
of Q315
is
coupled
through
CR334 to
the Z-axis
amplifier.
The
current through
CR334
is set
by
R330,
INTENSITY control.
When R330
is set to
+20
V,
CR334
is cut
off and the
crt is
blanked.
Cathode-Ray
Tube
Circuit.
A
repetitive, sinusoidal
signal
is
produced
by a
regenerative feedback oscillator in the
primary
of
T380
and
induced
into
the secondary. Current
drive for
the
primary
winding
is
furnished
by
Q380,
whose
conduction
is controlled
by
the voltage
difference between
its base
and emitter. The secondary
winding
of
T380
develops
about 350
volts peak-to-peak. The sextupler rec-
tifier
circuit (six
diodes in series) produces about
—980
V
dc at
the
crt
directly-heated cathode
(filament).
A
separate
transformer tap
and
rectifier
circuit,
CR382,
in
the
second-
ary
of
T380 produces
about
-t70
V
dc
for the vertical,
horizontal, and Z-axis
amplifiers.
The 350
volts
peak-to-peak
output
of
T380 is also
applied to CR415 and
CR416
to
provide the rectified
negative potential for the crt control
grid. CR420
limits
the
positive swing with respect to the
-t
dc
reference level
set by
Bias
adjustment
R425. CR418 limits the negative swing
with respect to the output voltage level of the
Z-axis
amplifier.
R410
connects the
crt
grid voltage
to
the crt
filament (cathode)
to
ensure
that the crt grid is
more
negative than —980
V
(crt is
cut
off).
A
positive-going
unblanking gate from the Z-axis amplifier
decreases crt bias
and
intensifies the
trace.
High voltage
regulation is accomplished
by
sampling the
—980
V
across
a
voltage
divider
returned
to
-t-20
V
(five
1
resistors
in series with
R362). A quiescent
level
of
zero
volts is established
at
the
base of
Q365,
a
Darlington
amplifier.
If
the
output
level
of the nominal —980
V goes
more
negative,
the
output
level of
Q365
goes
more
positive,
reducing the
conduction of
Q370 and
Q380.
The
result is a
lower
peak-to-F>eak
amplitude
induced in the
secondary of
T380.
Conversely, if
the
—980
V goes
more
positive,
Q380
will conduct harder
and
a
larger
peak-to-peak voltage
appears across the secondary of
T380.
C367
limits
the
regulator bandwidth
to
prevent
oscillations.
Q360
and
Q350,
and
associated components, is
a
high
voltage
shut-down circuit.
If
the
-t70
V or
—980
V supplies
increase above the amplitude regulation
limits, Q360
will
turn on, reducing the voltage difference between the
base
and
emitter of
Q380 to
near zero
and removes
the
current
drive
to
the primary
of
T380.
sc
5.01
REV-
6,
AUC
Z
Axis
and CRT
Cir-cuit
OKM
0174
Servicing
Information—
SC
501
LOW
VOLTAGE
SUPPLY
CIRCUIT
DESCRIPTION
The
+20
V
supply
provides power to
operate
the
SC
501
and
also
establishes
the
reference supply for
all
other
power
supplies,
including the crt
system. An error-
sensing
circuit,
Q500,
compares
a
sample of
the
+20
V
across
a
voltage
divider (R507-R506-R504)
with a
reference
voltage
established by
Zener diode,
VR500. Any
voltage
difference (or
change)
between
the base
and
emitter
of
Q500
is
amplified
by
Q500
and
applied to
the base of
Q510.
This
results in Q510
controlling (or regulating) the
conduction
of the
PNP
series-pass transistor
(located
in the
mainframe)
to
correct
for
a
change in the
+20
V
supply.
R500 (+20 V
Adjust)
sets
the quiescent
level at the base
of
Q500. R506
provides current
limiting for
Q500
in case
Q510
fails.
C505
prevents regulator
oscillations. Boot-
strapped
emitter-followers,
Q520
and
Q525
regulate the
+8.2
V supply in a
manner
similar
to
the
operation of
the
+20
V
regulator.
The
—20
V
and
—8.2
V
supplies are
regulated in
a
manner
similar
to
the
+20
V
and
+8.2
V
supplies,
except
that Q545
controls the conduction of
the NPN
series-pass
transistor located in the
mainframe. The
reference voltage
for the error-sensing circuit,
Q540,
is established by
CR540.
Loading...