Tektronix 613 User manual

TABLE OF
CONTENTS
SECTION 1 OPERATING INSTRUCTIONS Page
General 1-1
lnstallation 1-1
Power Connections 1-1
Rack Mounting 1-2
Cooling 1-2
Operation 1-2
General 1-2
Hold Mode 1-2
View Mode 1-2
Erase Mode 1-2
Non-Store Operation 1-2
Controls and Connectors 1-3
Front Panel 1-3
Rear Panel 1-3
Internal Connections 1-4
Control Signals 1-5
Signal Interface Connector, J701 1-5
Hard Copy Connector, J705 1-6
Remote Program Inputs 1-7
Operating Precautions 1-7
Specifications 1-7
General 1-7
Vertical and Horizontal
Deflection 1-8
Z Axis 1-8
CRT 1-9
Display 1-9
Power Requirements 1-10
Environmental 1-10
Physical 1-11
SECTION 2 SERVICING
I
REV. B DEC 1974
Introduction 2-1
Cover Removal 2-1
Preventive Maintenance 2-1
General 2-1
Cleaning 2-1
Visual Inspection 2-1
Transistor Checks 2-1
Re-adjustment 2-2
Corrective Maintenance 2-2
General 2-2
Obtaining Replacement Parts 2-2
Standard Parts 2-2
Special Parts 2-2
SECTION 2 SERVICING (cont) Page
Component Replacement 2-2
Circuit Card or Board
Replacement 2-2
Transistor and Integrated
Circuit Replacement 2-2
Cathode Ray Tube Replacement 2-2
CRT Phosphor Burns 2-4
SECTION 3 CALIBRATION
CALIBRATION PROCEDURE
Test Equipment Required
CALIBRATION INDEX
Complete Procedure
Preliminary Procedure
Power Supplies
Storage
Z Axis
Deflection Amplifiers
Display Alignment
Cathode Ray Tube
Settling Time
Hard Copy Amplifier
613-1 Square Format
FIELD ADJUSTMENT
PROCEDURE
SECTION 4 CIRCUIT DESCRIPTION
Deflection, Hard Copy Logic,
Cursor, and Z-Axis Input 4-2
Deflection Amplifier 4-4
Hard Copy Amplifier 4-7
Storage Circuit 4-7
Low-Voltage Power Supply 4-10
High Voltage and
Z Axis 4-11
SECTION 5 ELECTRICAL PARTS LlST
SECTION 6 DIAGRAMS
SECTION 7 MECHANICAL PARTS LlST
CHANGEINFORMATION

Fig. 1-1. 613 Storage Display Unit.
8

Section 1
OPERATING INSTRUCTIONS
General
The613 isaStorageDisplay unit,featuring aTektronix
flat-faced direct-view storage cathode-ray tube. The crt
has a diagonal dimension of 11 inches (15 cm
X 20 cm
quality viewing area). Inthe standard 613 configuration,
the long dimension of the rectangular display screen is
horizontal. As an option, the instrument can be ordered
with the long-axis vertical; in that configuration, the
instrument is identified as a 613-1. All references in this
manualpertaintoboththe613and613-1exceptasnoted.
The613finds its primaryapplicationas thedisplayunit
for a system where there is a requirementfor agreat deal
of alphanumeric and/or graphic data to be displayed
simultaneously and without flicker. It is often used in
CAUTION
a
This instrument is intended to be operated from a
single-phase power source that has one of its
current-carrying conductors (the neutral conduc-
tor) at ground (earth) potential. Operation from
other power sources where both current-carrying
conductors are live withrespect to ground (suchas
phase-to-phase on amulti-phase system, or across
the legs of a 117-234
V single-phase three-wire
system) is not recommended, as only the Line
Conductor hasover-current(fuse)protectionwithin
the instrument.
NOTE
remote terminal stations for digital computers and other
The power cord on Tektronix instruments may
data transmission systems.
conform to either of the following two electrical
codes:
INSTALLATION
Power Connections
The 613 is providedwith an attached three-wire power
cord with a three-terminal polarized plug for connection
to the powersource.Thegrounding terminaloftheplugis
directly connected to the instrument frame as
*Tinnedcopper conductor
recommendedbynationaland internationalsafety codes.
Color coding of cord conductors follows the National The 613 is normally wired at the factory for operation
Electrical Code (ANSI C-1, 1968) that specifies Line, from a 115-volt, 60 Hz ac line voltage supply. However, it
Black;Neutral,White; Safety EarthorGround,Greenwith can be made to operate from any one of six different line
Yellow Stripe (or solid Green). voltages bychanging some internaljumper connections.
Fig. 1-2. Jumper combinations for different line voltages.
REV. C, JULY, 1975

Operating Instructions-61 3
Access tothese connections isobtained by removing the
dust cover. To remove the cover, it is necessary first to
remove the three screws found on the dark-colored
feature strip along each side of the cabinet (sixscrews in
all).Thenthedust covercanbeliftedoff andsetaside.The
terminal strip containing the line voltage connectors is
found at the lower right rear of the instrument. Fig. 1-2
shows the jumper combinations for each of the six line
voltages.
Rack Mounting
The standard 613 isshipped from thefactory inafree-
standing desk-top configuration. If you plan a
rackmounted installation, your Tektronix Field Engineer
can supply complete details.
Cooling
The 613 iscooled byconvection, anddoes notcontain
afan. The back of thecabinet isequipped with a,heatsink
for more efficient cooling. At least 3 inches clearance at
the rear, and
2 inches at the sides and top must be
provided to allow the air to circulate freely around the
instrument. If for any reason the air circulation is
obstructed, the internal temperatures can exceed a safe
operating level in a relatively short period of time. The
maximum ambient temperature at which the instrument
can be safely operated is approximately 122"
F (50"C). If
this temperature is exceeded, a thermal cutout switch
interrupts line power to the instrument.
OPERATION
General
The display screen of the613 isaSTORAGE Cathode-
Ray Tube (crt). This means that data needs only to be
written a single time on the face of the tube, and the
storage characteristic of the tube causes the written
information to be retained for a considerable period of
time. This is incontrast to a REFRESHED,or Television-
type tube, where continuous repetition of the writing
process is required to maintain a display on the crt. The
useof astoragecrtpermitssimplifiedoperation oftheunit
while giving a stable,
flicker-free,'high-density display.
Topreparethe613for normaloperation,connectthe
X,
Y, and Z-axis signal sources to the r.ear-panel BNC
connectors. Allow the instrument to warm up for ap-
proximately
1 minute, and then push the ERASE button
once.
When the preparation procedure for normaloperation
is completed, the instrument will be in a ready-to-write
state and a display may be produced
and stored by the
application of appropriate
X, Y, and Z-axis signals.
CAUTION
Thedisplay screen can be permanently damaged if
theintensity is set toohigh. Refer tothe
INTENSITY
information under Controls and Connectors.
When a display is stored, it will remain at its normal
viewing intensity for about 90 seconds after the VlEW
pushbutton ispushedorthe lastZ-axis signalisapplied. It
then becomesveryfaint (H.OLDMODE),tothepointthat it
may not be distinguished from the background areas.
When the display changes and appears to be reduced in
intensity, the instrument has automatically shifted to a
holding mode of operation.
Hold Mode. An operating feature designed to prolong
theuseful lifeof the613crtisthe"Hold" mode.Whendata
has been stored on the display screen, it remains in a
bright condition for approximately 90 seconds after the
last data entry.Then thescreen automatically revertsto a
Hold Mode, in which the data remains stored on the
screen, but at a leveltoo lowfordirect viewing. Itremains
in this condition until more data is written, the VlEW
button is pressed, or the screen is erased. When the 613
receives an erase command, it comes out of the Hold
Mode, erases, and then immediately drops back into the
Hold Mode. The Hold Mode can be over-ridden by
dropping VlEW (ontheSignal InterfaceConnector,J701)
to a "low" TTL level.
View Mode. The instrument is returned to the View
Modeof theoperationfrom the HoldModebyanyofthree
means: with the front-panel VlEW switch; by a remote
View switch; or by the application of a Z-axis turn-on
signal. If the front-panel VlEW switch is used, the
instrument will remain in the View Mode for about 90
seconds, then automatically revert tothe Hold Mode. If a
remote View switch is used, the instrumentwill remain in
theViewModeonlywhiletheremoteViewswitchisclosed
(ground closure) and return to the Hold Mode when the
switch isopened (afteran approximate 90-second delay).
If a Z-axis turn-on signal is applied, the instrument will
shift to, and remain in, the View Mode for about 90
seconds, then automatically return to the Hold Mode.
(TheZ-axis turn-on signal isusedtoadd new information
to a stored display while the instrument is inthe Holdor
View Mode.)
Erase Mode. Erasure of stored displays is ac-
complished with either the front-panel ERASE button or
with a remote Erasecommand, whether the instrumentis
intheView or the HoldModeof operation. An erasecycle
usually requiresabout 0.95 second, andatthecompletion
of the cycle the instrumentisreturned to a ready-to-write
state.
Non-Store Operation. The 613 will assume a non-
storage mode of operation withthe applicationof a"low"
REV. C, JULY, 1975

Operating Instructions-613
TTL level or ground potential to pin 6 of the rear-panel
access plug (J701). (This is accomplished by setting
remote Non-Store to On.) In a non-store configuration,
the 613 may be usedas aconventional crt display unit for
repetitive waveforms.
I Controls and Connectors
Front Panel. The front panel contains only two
pushbutton controls and
a red pilot light.Thelightglows
to indicate that power is applied to the instrument. The
i controls are:
ERASE. Pushbutton switch.Pressing ERASEcauses any
displayed informationto be removed from the screen.
VIEW. Pushbutton located immediately below ERASE.
When the display is in Hold Mode, pressing VIEW will
cause the display to return to the viewing level, and
remain at the viewing level for approximately 90
seconds before returning again to Hold.
Rear Panel. Fig. 1-3 shows the rear panel, and the
locations of the various controls and connectors to be
found there.
INTENSITY. A rotary control, which turns the writing
beam current to a level that determineswhether aspot
on the display screen stores. Inthe non-store mode, it
determines thebeambrightness.Sincethecrtscreen is
easily "burned" (permanentlydamaged byatoo-bright
display lefton too long),the INTENSITYcontrolshould
be kept at the minimum level for a visible display until
such time as the
613 is operating normally within the
system. When the 613 is so operating, the INTENSITY
Fig. 1-3. Rear panel controls and connectors.
REV. B DEC 1974

Operating Instructions-613
should be set for the viewing level that gives the
sharpest definition and left there for most normal
applications (clockwise for a high intensity level;
counterclockwise for a lower intensity level).
HCINT. HardCopy Intensity-A screwdriveradjustment
located adjacentto INTENSITY (refertoCalibrationfor
adjustment procedure). This controlsets the intensity
level of the scanning beam during the hard-copy
function only, and is independent of INTENSITY.
FOCUS. A rotary controllocatedjust below INTENSITY.
Properlyadjusted,itsetsthebeamwidthtoanoptimum
setting for the best display resolution.
OPERATING LEVEL. A screwdriver adjustment at the
upperleftcornerofthe rear panel. Itsetsthecrtstorage
target back-plate to the propervoltage levelforstorage
operation.Fordetails of itsadjustment,seetheAdjust-
ment Procedure, Section 3.
POWER. A toggle switch at the lower left corner of the
rear panel that controls ac line power to the 613.
Connectors X, Y, and
Z. Three BNC connectors located
onthe connector plate ontherearpanelabovetheheat
sink. The inputsignalstotheX (horizontal),Y(vertical),
and Z amplifiers are fed into these connectors.
Hard Copy Connector. A 15-contact socket (J705)
located to the left of the X, Y, and Z connectorsonthe
connector plate. This connector provides an interface
for signals from the 4610 (or4610 Option
1) HardCopy
Unitand viceversa,topermitthemakingof hardcopies
of 613 displays.
Signal Interface Connector. A 25-contact socket (J701)
located immediately below the Hard Copy Connector
onthe613rearpanel.TheX, Y, andZ-input signals,and
the signals for the remote control of the613operating
functions are applied through this connector.
Internal Connections (Fig. 1-4)
ORIGIN LOCATION JUMPERS J9-J10. Thesetwo "har-
monica" connectorsselect the undeflected horizontal
and vertical positionof the writing beam (see Fig. 1-5).
HARD COPY BUSY JUMPER J24. "Harmonica" connec-
tor inthe H C Busy position causes signal BUSY to be
true when the 613 display is being hard copied.
DEFLECTION BUSY JUMPER J26. "Harmonica" con-
nector in the Deflection Busy position causes signal
BUSY to be true when the613 deflectionsystem is not
settled.
INPUT POSIT1
SHORT AXlS
INPUT SIZE
Z AXIS INPUT
AXlS CENTERING
SHORT AXlS
Fig. 1-4. Internal connectionoptions located on the Deflection Amplifier Board.The 613 is shipped from the factory with the
jumpers wired as shown above.
REV. B DEC 1974

Operating Instructions-61 3
*Factory-connected position
Fig.
1-5.
Writing beam origin positions and the related jumper positions on the Deflection Amplifier board.
RECTANGULAR-SQUARE FORMATJ11. Fig.1-4shows commands enter at the rear-panel Signal lnterface Con-
the J11 jumper connected across pins 2 and 3, the trol, J701. Fig.1-6showsthe pinlocationsof thesesignals,
normal connection for a rectangular (15 X 20 cm) as well as the incoming and outgoing signals applied to
display format. In the 613-1, pins 1 and 2 of J11 are J705, the Hard Copy Connector, when a 4610 or 4610
normally connected to provide a square (15 X 15 cm) Option 1 Hard Copy Unit is connected. Further descrip-
display format. tions of the control signals follow.
Signal lnterface Connector, J701
GEOMETRY CALIBRATE J14. As shown in Fig. 1-4, the
~14jumper is always connected across pins 1 and 2, ErasePin 18. A TTL "low" signal causes the displaytobe
except when Geometry is being adjusted as described erased.
in Section 3 Calibration, Step I1e.
Z AXIS SELECTOR (Coaxial Cable). With the coaxial
cable connected as shown (to J17) in Fig. 1-4, Z-axis
input is normal (a one-volt signal turns on the Z-axis
Amplifier, and a0.5-volt signal turns it off). IntheTTL
(alternate) position(J16),aTTL-logic low level enables
the Z-axis Amplifier, and a TTL high shuts it off.
ORIGIN SHIFTER J15. Connected to pins 1 and 2 as
shown in Fig.1-4, the Origin Shifter movesthe display
trace origin in one-point increments on successive
erasures. Disable during calibration by connecting to
pins 2 and 3.
Non-Store Pin6. A TTL "low" signal placesthe 613 crt in
a"non-store" mode.A repetitiveinputtotheX,Y, andZ
amplifiers is requiredto produceacontinuous display.
Cursor Pin8. When aremote TTL "low" isapplied,thecrt
stops reacting in the normal way toaZ-amplifier input
pulse. Instead, the writing beam is duty-cycle con-
trolled at alowrepetition rateand moved inasquare
8 X
8 dot matrix pattern to produce a non-storing,square
cursor. This cursor is provided so that the beam
position can be visually located, without additional
information being stored, or existing information
destroyed. The 613 cursor does not have a write-thru
operating mode.
CONTROL SIGNALS
-
View Pin 20. When the 613 is in Hold Modeand a remote
Inthe typical system configuration in which the 613 is TTL "low" is applied, the instrument will switch to the
used, the XI Y, and
Z inputs and the control functions of View Mode and remain in that mode until the "view"
the instrument are commanded by remotesignals. These signal goes to a TTL "high".
REV. B DEC 1974

Operating Instructions-613
SLOW RAMP GND
FRAME GROUND
'copy Gate is called HCU on the
4610 Option 1 (Multiplexer Option).
A. Hard Copy Connector, 5705.
NON-STORE
Fig. 1-6. Pin configurations of (A) The Hard Copy Connector
and
(B) the Signal Interface Connector. (Illustrated from wired
side of connectors.)
613 Busy Pin7. A TTL "low" ispresentat thiscontactany
time the 613 is inan erase interval, a hard copy isbeing
made, or the 613 is in its settling time delay period.
These last two functions are internal jumper options
(see Fig. 1-4).The signal is used to notify associated
equipment, such as acomputer,that the613 isinoneof
the above-named states.
Make Copy Pin24. If a4610 HardCopyUnitisconnected
to J705, a TTL "low" at this terminal commands the
Hard Copy Unit to make a copy of the display.
Program Ground Pin 19. This isthe ground reference for
the remotely-connected external functions.
Hard Copy Connector, J705
The Hard Copy Connector provides interface between
the 613andthe4610 (or4610Option 1) HardCopy Unitfor
control signals having to do with the making of hard
copies of the 613 display. Fig. 1-6 illustrates the pin
configurationof J705. Furtherdescription
provided below.
Slow Ramp Pins1
& 2. TheSlow Rampsignalisfurnished
by the Hard Copy Unit to the 613 to provide a vertical
scanning signal on the 613 Display Unit (horizontal
scanning signal on the 613-1).
Fast Ramp Pins3
& 4. The Fast Rampsignal isfurnished
bythe HardCopy Unittoprovideahorizontalscanning
signal to the 613 DisplayUnit (verticalscanning signal
on the 613-1).
Interrogate Pins5
& 6. Interrogation pulses are supplied
bythe Hard Copy Unitto drivethez-axis ofthe Display
Unit during the hard-copy process.
-
Tarsig Pins 7 & 8. Signals are sent from the target
amplifier in the 613 to the Hard Copy Unit at any time
when a hard copy is being made.
-
7
Read Pin 9. When the copy command is given, Read is
sent to the 613 to switch it to the Hard Copy Mode.
Make Copy Pin 11.
A signal supplied to the Hard Copy
Unit(fromJ701toJ705)toinitiatethemakingof acopy.
Copy Gate Pin 13. In the 4610, this signal is supplied to
indicate that the Hard Copy Unit is busy. In the 4610
Option 1, this signal is called HCU, and it is always in
the low state when the Hard Copy Unit power is On.
-
Wait Pin 14. This signal is usedonly withthe4610 - Option
1. In the Hard Copy Unit Multiplexer Option,
- Wait is
held in the low state at all times except when Read is
high.
Pin 15. Frame ground.
Pins 10 & 12. Not used.
REV. B DEC 1974

Remote Program Inputs
The functions and operating modes of the 613 are as
follows: Erase, View, Non-Store, and Cursor. These
modes may be controlled from a remote station by
applying appropriate ground closures through the rear-
panel Signal lnterface Connector, J701 (see Fig. 1-6).
If desired, the Signal lnterface Connector may be used
to apply X, Y, and
Z signals to the instrument. Fig. 1-6
shows the pins that are normally reserved for this option.
To maintain the input capacitance specification of the
instrument when altering the wiring, use the internal
coaxial cables bydisconnecting the cables from the X, Y,
and
Z BNC connectors and reconnecting these same
cables to the appropriate pins.
Operating Precautions
Operating Instructions-61 3
A dark-burn condition is the destruction of the
phosphor on the crt by too much beam current. This
condition isevidenced byaspotorarea onthescreenthat
will not reacttothe writing gun (remainsdark and cannot
be illuminated). As with a conventional crt, the only
remedy for this condition is replacement of thecrt,unless
an adequate portion of the screen remains usable.
2. Erasethe displaywhen the informationis nolonger
needed. If a display is left on the crt too long, the crt can
cause a residual image to appear. The brightness level of
the image phosphor as compared to the brightness level
of the new display's backgroundphosphor will determine
whether the image appears as positive or negative. The
residual image can be erased by establishing a fade-
positive condition (refer to the Maintenance section).
SPECIFICATIONS
To prolong the useful life of the crt, observe the General
following precautions when operating the 613. Theelectrical performancecharacteristicsspecified in
this section are valid under the following conditions.
1. Adjust the INTENSITY controlfor the lowest (coun-
terclockwise) setting that will produce a clear, well- 1. The instrument must have been calibrated at an
defined display. Excessive intensity may Cause either a ambient temperature range between +680 F and +860
F
bright-burn condition or, if intense enough, a more (+200c and +30°c),
serious dark-burn condition. 2. The instrument must be operated in an ambient
temperature environment as described under Cooling in
A bright-burn condition is when a light image of the this section,
display remains on the screen after erasure. Refer to the
Maintenance section for instructions on how tomcurea 3. There must be a warm-up period of at least 20
bright-burn condition. minutes.
REV. B DEC 1974

Operating Instructions-61 3
TABLE 1-1
ELECTRICAL
VERTICAL AND HORIZONTAL DEFLECTION
Supplemental
Characteristic Requirement
REV. B DEC 1974
Internal gain adjustment permits 15%
additional range
See Fig. 1-5
lnput Requirements
Deflection
Horizontal (20 cm full
screen)
Vertical (15 cm full screen)
Sense
Maximum Input Voltage
Input R and C
Signal Beam Origin Position
Position Stability (0°C to
4-50" C)
Beam Settling Time
Z AXIS
1V/15 cm in square format
1V/20 cm in rectangular format
Within 2% of full screen deflection
(referred to center screen)
1 V/15 cm within 2% of full screen
deflection (referred to center screen)
+ vertical input moves beam upwards
+ horizontal input moves beam to the
right
f 18 V dc plus peak ac
20
kC2 minimum and 60 pF
maximum
Shipped with jumpers set for position
7
(origin in lower left corner)
5 mm maximum
(to within 0.025 cm) 14ps
-t 6ps/cm
for a spot movement up to 2 cm;
3 ps/cm for movements beyond 2 cm
lnput Requirements
Turn Beam On
Turn Beam Off
Maximum Input Voltage
At least $1 V
+0.5 V or less
f 20 V dc plus peak ac

Operating Instructions-613
TABLE 1-1 (cont)
CRT
Supplemental
Equivalent to
2 TTL loads
Characteristic
Input
R and C
TTL
(Z AXIS) Maximum Input
Turn Beam On
Turn Beam Off
Phosphor
Requirement
10
kn, +1O0/0, shunted by approximately
50 pF
+ 5 V
A TTL low level
A TTL high level
Type
I Storage Capacity
Quality Area
Bistable storage
I
Horizontal
Vertical
Stored Resolution
1 25% incremental in quality area
/ 200 x 266 line pairs
DISPLAY
REV. B DEC 1974
Linearity
Full Scale
Incremental
Viewing Time
Orthogonality
Line Straightness (deviation
from mean straight line)
Erase Time
Dot Writing Time
Within 1-1/2% along center axis (spot
will settle within 1-1/2% of proper
position for voltage applied)
No more than 15% difference in spacing
over any 2 cm interval in both axes
15 minutes or less recommended for
specified resolution
90 degrees, 311 degree
0.5% or less of line length
=0.9 second
5 gs or less at specified resolution
--
View Mode timer causes display to
enter Hold Mode 90 to 120 seconds
after VIEW switch is actuated

Operating Instructions-61 3
TABLE 1-1 (cont)
POWER REQUIREMENTS
--
Line Voltage Ranges
Low
Supplemental
Characteristic Requirement
Medium
Power Consumption (at 115 V
60 Hz)
220 v,
+lO0/0
115 V, +1O0/0 230 V, +1O0/0
High
180
W maximum
120V, &1O0/o 240 V, f1O0/0
Line Fuse 3 A fast blowing type for 115
V
operation
1
1.5 A fast blowing type for 220 V
I
I operation
Internal Fuses
4-25 V
I
1 3 A fast blowing type
TABLE 1-2
ENVIRONMENTAL
-25 V
Deflection
2 A fast blowing type
1 A fast blowing type for each
deflection axis (mounted on Deflection
etched-circuit board)
1-1 O
REV. B DEC 1974
Supplement
Qualified under NSTC test procedure
1A, category 11 (24 inch drop)
Characteristic
Temperature
Non-Operating
Operating
Specified Operation Range
Altitude
Non-Operating
Operating
Transportation
Requirement
-40" C to $65" C
0° to 50"C (at sea level)
25"C, +lO°C (at sea level)
To approximately 50,000 ft.
To approximately 15,000ft.

Operating Instructions-61 3
TABLE 1-3
PHYSICAL
REV. €3 DEC 1974
Characteristic
Dimensions
Height
Width
Depth
Weight
Net
Shipping
Requirement Supplemental
Approximately 11 inches (approxi-
mately 28 centimeters)
Approximately 13 inches (approxi-
mately 34 centimeters)
Approximately
21 inches (approxi-
mately 53 centimeters)
Approximately 43 pounds (approxi-
mately 19.5 kilograms)
Approximately
55 pounds (approxi-
mately 25 kilograms)

Introduction m
This section of the manual contains maintenance
information for use in preventive and corrective
maintenance.
Cover Removal
The top cover of the instrument is held in place by six
screws. To remove the cover, remove the screws and lift
the cover off the instrument. The cover protects the
instrumentfrom getting dust in the interior,and provides
proper airflow for cooling.
Avoid the use of chemical cleaning agents that
might damage the plastics used in this instrument.
Avoid chemicals that contain benzene, toluene,
xylene, acetone or similar solvents.
Exterior. Loosedust accumulated onthe outsideofthe
instrumentcan be removed with asoft clothorsmall paint
brush.The paintbrushisparticularlyusefulfor dislodging
dirt on and around controls. Dirt that remains can be
removedwith asoftclothdampened inmilddetergentand
water solution. Abrasive cleaners should not be used.
Dangerous potentials exist at several points
throughout this instrument. When the
613 is
operated with the cover removed, do not touch
exposed connections or components. Some tran-
sistors have elevated cases. Disconnect power
before cleaning the instrument or replacing parts.
PREVENTIVE MAINTENANCE
General
Preventive maintenance consists of cleaning, visual
inspection, lubrication, etc. Preventive maintenance per-
formed on a regular basis reduces instrument-downtime.
Theseverity of theenvironment to whichtheinstrumentis
subjected determines the frequency of maintenance. A
convenient time to perform preventive maintenance is
preceding re-adjustment.
Cleaning
-
General. The 613 should be cleaned as often as
operating conditions require. Accumulation of dirt in the
instrument can cause overheating and component
breakdown. Dirt onthe componentsacts as an insulating
blanket and prevents efficient heat dissipation. It also
provides electrical conduction paths that may result in
Interior. Dust in the interior of the 613 should be
removed occasionally due to its electrical conductivity
under high-humidity conditions.Thebestwaytocleanthe
interior is to blow off the accumulated dust with dry, low-
pressureair. Removeanydirtthatremainswith asoftpaint
brushoraclothdampenedwithamilddetergent andwater
solution. A cotton-tipped applicator is useful for cleaning
in narrow spaces or for cleaning circuit cards.
The high-voltage circuits, particularly parts located in
the high-voltage compartment, should receive special
attention. Excessive dirt in this area may cause high-
voltage arcing and result in improper instrument opera-
tion.
Visual Inspection
The 613 should be inspected occasionally for such
defects as broken connections, improperly seated tran-
sistors,damaged circuit boardsand heat-damaged parts.
The corrective procedure for most visible defects is
obvious; however, particular care must be taken if heat-
damaged components are found. Overheating usually
indicates other trouble in the instrument; therefore, it is
important that the cause of overheating be corrected to
prevent recurrence of the damage.
instrument failure.
Transistor Checks
The cover provides protection against dust in the Periodic checks of the transistors are not recommend-
interior of the instrument. Operation without covers in ed.The best check of the transistor performance is actual
place necessitates more frequent cleaning. operation in the instrument.
REV. B DEC 1974

Re-adjustment
To ensure acceptable performance, check the adjust-
mentof this instrumentaftereach
1000 hoursofoperation
or every six months if used infrequently. Any time
components are replaced, recalibration of the affected
circuits may be necessary.Complete adjustment instruc-
tions are given in the Calibration section
The adjustment procedure can also be helpful in
localizing certain troubles in the instrument. In some
cases, minor troubles may be revealed and/or corrected
by readjustment.
CORRECTIVE MAINTENANCE
General
Corrective maintenance consists of component
replacement and instrument repair. Special techniques
required to replace components in this instrument are
given here.
Obtaining Replacement Parts . '
Standard Parts. All electrical and mechanical parts
replacements can be obtained through your local
Tektronix Field Office or representative. However, many
of the standard electronic components can be obtained
locally in less time than is required to order them from
Tektronix, Inc. Before purchasing or ordering replace-
mentparts,check the parts listsforvalue,tolerance,rating
and description.
Component Replacement
Disconnect the instrument from the power source
before replacing components.
Circuit Card or BoardReplacement. Ifacircuit board is
damaged beyondrepair, the entire assembly including all
soldered-on components must bereplaced. Partnumbers
are given in the Mechanical Parts List for the completely
wired boards.
Transistor and Integrated Circuit Replacement.
Transistors and Integrated Circuits should notbe replac-
ed unless actually defective. If removedfromtheir sockets
during routine maintenance, returnthem totheir original
sockets. Unnecessary replacement of transistors or IC's
may affect the calibration of this instrument. When
transistors or IC's are replaced,checkthe operation of the
parts of the instrument that may be affected.
Replacement transistors or ICrs should be of the
original type or a direct replacement. Fig. 2-1 shows the
lead configuration of the transistors and ICrsused inthis
instrument. If atransistor is replacedbyanothertransistor
madebyadifferent manufacturer than the original,check
the manufacturer's basing diagram for correct basing.
Transistors that have heat radiators (or are mounted on
the chassis) use siliconegrease to increase heat transfer.
Replace the silicone grease when replacing these tran-
sistors.
NOTE
I WARNING )
Handle silicone grease with care. Avoid getting
silicone grease in the eyes. Wash hands thoroughly
after use.
When selecting replacement parts, it is important to
remember that the physical size and shape of a
component may affect itsperformanceintheinstru-
ment, particularly at high frequencies. All replace-
ment parts should be direct replacements, unless it
is known that a different component will not
Cathode Ray Tube Replacement
adversely affect instrument performance.
Special Parts. In addition to the standard electronic The crt may implode if it is scratched or struck
components, some special components are used. These severely enough. Wear protective clothing and a
components are manufactured or selected byTektronix, face shield when replacing the crt.
Inc. to meet specific performance requirements, or are
manufactured for Tektronix, Inc. in accordance with our
specifications. Most of the mechanical parts used in this To remove the cathode ray tube, use the following
instrument have been manufactured by Tektronix, Inc. procedure:
Order all special parts directly from your localTektronix
Field Office or representative. 1. Disconnect the signal cables.
REV. B DEC 1974

Fig. 2-1.
Lead configurations of transistors and integrated circuits in the 613.
2. Disconnect the power cord from the source. 10. Pull the crtstraight forward from the unit.Support
the crt neck when removing the crt cable and plug.
3. Remove the top dust cover. 11. With the crt out of the unit, remove the rubber
4. Removethe top two screws holding the heat sink to gasket.
the rear panel.Swing the heatsink outanddowntoobtain
access to the crt base socket. 12. Protect the crt from damage while it is out of the
unitbyplacing itfacedown onthesoft mat,or (preferably)
5. Disconnect thecrtbasesocket bypullingthesocket by placing it in a crt shipping carton.
straight back.
6. Disconnect stbrage plug J20 from the Hard Copy To installacrtinthe 613, use thefollowing procedure:
Amplifier board. 1. Place the rubber gasket on the crt faceplate. The
7. Remove the four screws that hold the green light rubber gasket must be correctly installed to prevent its
filter to the instrument. Disconnect thetwo-pinconnector front holding lip from rolling back and causing a bind
from the red pilot light and remove the filter. when installing the unit.
8. Remove the electro-magnetic interference (emi)
shield brackets and the emi shield. 2. Partially insertthecrtintotheunitandpushthe plug
and cable through the access hole in the shield, then
9. Remove the four nuts, spacers and the implosion guide the crt neck into the yoke and push the crt all the
shield frame (see Fig. 2-2). way into the unit. Do not allow stress on the crt neck.
REV. B DEC 1974 2-3

IMPLOSION SHIELD FRAME
WITH GROUNDING CLI
EM1 SHIELD
BRACKET
Fig. 2-2. Locationsof crt securing hardware.
3. Reinstall the implosion shield frame, spacers and Since a sharp blow may cause the shield to lose
nuts. some of its protective properties, handle it carefully.
If the shield is damaged and a loss
of shielding
4. Connect the base socket to the crt base.
5. Insert and tighten thescrewssecuring the heatsink
against the rear panel. Align the trace as described in
Section 3 Calibration.
6. Installthe emi Shieldwith the silver ringtowardthe
crt faceplate. Replace the front panel and red pilot light
connector. If the pilot light will not light when the 613 is
turned on, (uses a LED as an indicator) reverse the
indicator connector.
7. After the installation of the crt', it may be necessary
to calibratethe instrument and repositiontheyoke. These
procedures are given in Section 3.
occurs, contact your local Tektronix, Inc. Field
Office or representative for assistance.
CRT Phosphor Burns
A bright-burn condition iswhen afaint image (residual
image) of the display remains on the screen after erasure.
Bright-burn images can be erased by adjusting the
OPERATING LEVEL control to bringthe entire screen up
tothe brightness level of the residualimage (fade-positive
condition).Thetime requiredfor afade-positive condition
to completely erase the image dependsonthe severity of
the burn.A severe burnmay require uptoa 12-hour fade-
positive condition for complete screen erasure. Operate
the instrument in the fade-positive mode only as long as
necessary, since extended fade-positive operation will
decrease the life expectancy of the crt.
A dark-burn condition is the destruction of the
NOTE phosphor on the crt by the intensive beam current. This
conditionisevidenced by aspotorareaonthescreenthat
Thecrtshield and crtneck shield are fabricated from
will not reacttothe writing gun (remainsdark and cannot
a metal that protects the crt yoke and electron
be illuminated). As with a conventional crt, the only
trajectories from external magnetic interference.
remedy for this condition is replacement of the crt.
2 -4
REV. B DEC 1974