Tektronix 214 User manual

O
Tektronix , Inc.
P.O.
Box
500
Beaverton
,
Oregon
97077
070-5055-00
Product Group 40
Tektronix
COMMITTED
TO
EXCELLENCE
WARNING
THE
FOLLOWING
SERVICING
INSTRUCTIONS
ARE
FOR
USE
BY
QUALIFIED
PERSONNEL
ONLY .
TO
AVOID
PERSONAL
INJURY
,
DO
NOT
PERFORM
ANY
SERVICING
OTHER
THAN
THAT
CONTAINED
IN
OPERATING
INSTRUCTIONS
UNLESS
YOU
ARE
QUALIFIED
TO
DO
SO
.
PLEASE
CHECK
FOR
CHANGE
INFORMATION
AT
THE
REAR
OF THIS
MANUAL .
214
OSCILLOSCOPE
SERVICE
SN
B300000 &
ABOVE
INSTRUCTION
MANUAL
B304255
1304259
MAGNETIC
DATA
CALIFORNIO
Serial
Number
First
Printing
SEP
1984
Revised
JUL 1989

Copyright  1973 , 1984 Tektronix , Inc. All rights reserved . Contents of this
publication may not be reproduced in any form without the written
permission
of
Tektronix ,
Inc.
Products of Tektronix , Inc. and its subsidiaries are covered by U.S. and
foreign patents issued and pending .
ERTRONI
TEKTRONIX , TEK , SCOPE - MOBILE , and
of Tektronix , Inc.
Printed in U.S.A. Specification and price change privileges are reserved .
are
registered
trademarks
INSTRUMENT SERIAL NUMBERS
Each
instrument has a
serial
number
on
a
panel
insert
, tag
, or
stamped on
the
chassis
.
The first
number or letter
designates the country
of
manufacture .
The last five digits of the serial number are assigned sequentially and are
unique to each instrument . Those manufactured in the United States have six
unique
digits .
The
country
of
manufacture
is identified as
follows
:
B000000 Tektronix , Inc. , Beaverton , Oregon , U.S.A.
HK00000
TEKTRONIX , INC . ,
Hong
Kong
G100000 Tektronix Guernsey , Ltd. , Channel Islands
E200000 Tektronix United Kingdom , Ltd. , Marlow
J300000
Sony
/
Tektronix
,
Japan
H700000
Tektronix
Holland
, NV ,
Heerenveen ,
The
Netherlands


LIST OF ILLUSTRATIONS
LIST OF TABLES
OPERATORS SAFETY SUMMARY
SERVICING SAFETY SUMMARY
SECTION 1
SPECIFICATION
SAFETY CONSIDERATIONS .
TABLE OF CONTENTS
PERFORMANCE CONDITIONS
SECTION 2
OPERATING INFORMATION
INTRODUCTION
SAFETY CONSIDERATIONS
LINE FUSE ....
CONTROLS AND CONNECTORS
INTRODUCTION
FRONT PANEL CONTROLS ..
LEFT SIDE PANEL CONTROLS .
RIGHT SIDE PANEL CONTROLS
OPERATING CONSIDERATIONS ..
OPERATING POWER INFORMATION
Internal
Battery
Operation
..
Battery
Charging
AC
Operation
INTENSITY CONTROL
GRATICULE
.
CRT CARE ..
SIGNAL CONNECTIONS
GROUNDING ...
INPUT
COUPLING ..
OPERATOR'S ADJUSTMENTS
INTRODUCTION ...
EQUIPMENT REQUIRED
VERT GAIN
CHECK
STEP ATTENUATOR BALANCE
HORIZONTAL GAIN CHECK
HORIZONTAL TIMING CHECK
FOCUS .....
AUTO PRESET
Page
iv
1-1
1-1
2-1
2-1
2-1
2-2
2-2
2-2
2-3
2-3
2-5
2-5
2-5
2-5
2-5
2-6
2-6
2-6
2-6
2-7
2-7
2-8
2-8
2-8
2-8
2-8
2-9
2-9
2-9
2-9
214
Service ( SN
B300000 &
ABOVE )
SECTION 3
THEORY OF OPERATION
INTRODUCTION
GENERAL DESCRIPTION
DETAILED CIRCUIT DESCRIPTIONS
Vertical
amplifiers .
Chop
Oscillator .
Vert Mode Switch ..
Vertical and
Horizontal
Output
Amplifiers
Trigger
Generator
Auto
Preset .....
Sweep
Generator
Single Sweep .
Storage
..
Power
Supply
Overvoltage
Protection
CRT Circuit ...
SECTION 4 CALIBRATION
INTRODUCTION
PURPOSE ..
STRUCTURE .
TEST EQUIPMENT
LIMITS AND TOLERANCES .
STEP TITLES ....
PREPERATION FOR CALIBRATION
POWER SUPPLY AND CRT DISPLAY
VERTICAL DEFLECTION SYSTEM ..
TRIGGER SYSTEM .....
HORIZONTAL DEFLECTION SYSTEM
SECTION 5
MAINTENANCE
INTRODUCTION ...
STATIC - SENSITIVE COMPONENTS .
PREVENTIVE MAINTENANCE ...
INTRODUCTION
GENERAL CARE
INSPECTION AND CLEANING .
Exterior ..
Interior
..
LUBRICATION
SEMICONDUCTOR CHECKS .
PERIODIC READJUSTMENT .
Page
3-1
3-1
3-3
3-3
3-3
3-3
3-4
3-5
3-5
3-5
3-5
3-5
3-7
3-10
3-10
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-5
4-9
4-13
4-15
5-1
5-1
5-2
5-2
5-2
5-2
5-2
5-3
5-4
5-4
5-4

214
Service
(
SN
B300000
&
ABOVE
)
SECTION 5
MAINTENANCE (
cont
)
ii
TABLE OF CONTENTS ( cont )
TROUBLESHOOTING
INTRODUCTION
TROUBLESHOOTING AIDS ..
TROUBLESHOOTING
EQUIPMENT
TROUBLESHOOTING
TECHNIQUES
CORRECTIVE MAINTENANCE
INTRODUCTION ...
MAINTENANCE
PRECAUTIONS
OBTAINING REPLACEMENT
PARTS
...
MAINTENANCE
AIDS
.
INTERCONNECTIONS
TRANSISTORS
AND
INTEGRATED
CIRCUITS .....
SOLDERING TECHNIQUES ..
DISASSEMBLY INSTRUCTIONS .
REPACKAGING
FOR
SHIPMENT
SELECTABLE
COMPONENTS ..
Page
5-5
5-5
5-5
5-6
5-6
5-10
5-10
5-10
5-10
5-10
5-11
5-12
5-12
5-13
5-15
5-15
SECTION 6
OPTIONS
INTRODUCTION
OPTION 01 ..
OPTION 02 .
SECTION 7
SECTION
8
SECTION
9
REPLACEABLE
ELECTRICAL
PARTS
DIAGRAMS
Page
REPLACEABLE
MECHANICAL
PARTS
CHANGE
INFORMATION
6-1
6-1
6-1
O

Figure
2-1
2-2
3-5
3-6
3-7
The
214
Oscilloscope ..
Front panel controls ..
Right side panel controls .
3-1
Vertical input amplifiers detailed block diagram ..
3-2
Vertical and Horizontal output amplifiers detailed block diagram
3-3
Trigger / Sweep
Generator detailed
block diagram
3-4 Identification of portion of the Sweep Start Holdoff waveform at Pin 5
of
the
Single
Sweep
Board .
Storage circuit detailed block diagram .
Power Supply
circuit block
diagram
CRT
Circuit detailed
block diagram
Table
LIST OF ILLUSTRATIONS
5-1
Location of circuit boards
5-2
Multi - connector holder orientation
5-3
Location
of
screws
for
disassembly
5-4 Proper method for wrapping probes
5-5 Selecting power supply capacitors for 48 to 52 Hz sinewave operation
5-6
Selecting
power supply
capacitors for 58
to 62 Hz
sinewave operation
1-1
Specifications
2-1
Test
Equipment .
Test
Equipment
Required
.
Power Supply Limits
214 Service ( SN B300000 & ABOVE )
LIST OF TABLES
4-1
4-2
4-3
Deflection Accuracy Limits
4-4
Settings
for
Bandwidth Checks
5-1
Relative Susceptiblity to Stataic - Discharge Damage
5-2
External Inspection Check List ..
5-3
Internal Inspection Check List .
5-4
Maintenance Aids ...
5-5
Power Supply
Capacitors
Page
vi
2-2
2-3
3-2
3-4
3-6
3-7
3-8
3-9
3-10
5-5
5-6
5-13
5-14
5-16
5-16
Page
1-2
2-8
4-2
4-5
4-10
4-12
5-1
5-2
5-3
5-11
5-15
iii

214 Service ( SN B300000 & ABOVE )
OPERATORS
SAFETY
SUMMARY
The
general
safety information
in this
part of
the
summary is
for both
operating
and
servicing
personnel .
Specific
warnings
and
cautions will be
found throughouat
the
manual
where they
apply
, but
may not
appear
in this
summary
.
CAUTION
statements
identify
conditions or
practiaces
that
could
result in
damage to the
equipment
or
other
property .
WARNING
statements
identify
conditions
or practices
that
could
result in
personal
injury or
loss of
life .
Terms As Marked on Equipment
CAUTION
indicates
a
personal
injury
hazard not
immediately
accessible as
one
reads the
marking
, or a
hazard to
property
including
the
equipment
itself
.
DANGER
indicates
a
personal
injury
hazard
immediately
accessible
as one
reads the
marking .
4
Terms
In
This Manual
DANGER
-
High
voltage .
iv
This
symbol
indicates
where
applicable
cautionary or
other
information
is to be
found
.
Symbols
In This
Manual
Symbols As
Marked on
Equipment
ATTENTION
- refer
to manual
.
Protective
ground
(
earth
)
terminal .
Use the Proper Fuse
To
avoid fire
hazard , use
only the
fuse of
correct
type
,
voltage
rating and
current
rating as
specified
in the
parts
list for
your
product .
Refer
fuse
replacement
to
qualified
service
personnel
.
Do Not Operate in Explosive Atmospheres
To
avoid
explosion
, do
not
operate
this
product in
an
explosive
atmosphere
unless it
has
been
specifically
certified
for
such
operation .
Do
Not Operate
Without
Covers
To
avoid
personal
injury
, do not
operate
this
product
without
covers
installed .
O

214 Service ( SN B300000 & ABOVE )
SERVICING SAFETY SUMMARY
FOR
QUALIFIED
SERVICE
PERSONNEL
ONLY
Refer also to the preceding Operators Safety Summary .
Do Not Service Alone
Do
not
perform internal
service or
adjustment of this
product unless
another
person capable
of rendering first
aid
and
resuscitation is
present
.
Use Care When Servicing With Power Applied
Dangerous
voltages
exist at
several
points in this
product . To
avoid
personal injury
, do not
touch exposed
connections or components while power is applied .
Disconnect power before removing protective cover , soldering , or replacing components .

214 Service ( SN B300000 & ABOVE )
vi
CH 1
( X )
STEP
ATTEN
INPUT
COUPLING
AC KNO
* C
INPUT
COUPLING
AC
GND
OC
STEP
ATTEN
CH
2 BAL
m
Tektronix
POSITION
POS
POSITION
POS
READY
VAR V /
DAY
VAR
SINGLE
SWP
RESET
STORE
ERASE
VAR V / DIV
VOLTS
/
DIV
214
STORAGE
OSCILLOSCOPE
CH1
(
EXT
HORZI
POWER
(
BATTERY
CH2
TRICSSO
VERT
MODE
AUTO
PRESET LEVEL / SLOPE
2018
C # 2
TRIG
Wents
PIECET
INT
INTENSITY
OFF
TRIG
SOURCE
FOCUS
MONIZ
MAS
COCH EXT
VAR
POS
]
]
EXT
TRIG
Tektronix 214 Dual - Trace Storage Oscilloscope .
COMMON
5054-01

O
SPECIFICATION
INTRODUCTION
The
TEKTRONIX 214
Storage
Oscilloscope is a
portable
500 - kHz instrument that combines
mall
size
and
light
weight with the ability to make precision waveform
measurements . It
is
designed for general - purpose
applications where display storage is desired , along with
conventional (
NONSTORE )
operation .
The dual - channel
DC - to - 500 kHz
vertical
system
provides vertical deflection factors from 1 mV ( at a reduced
bandwidth ) to 50
V per division
at the tip of either
of the
integral high - impedance probes . Single trace operation is
achieved by selecting either CH 1 or CH 2 with the VERT
MODE switch and dual trace operation is achieved by
selecting BOTH from the VERT MODE switch . Single
Sweep operation is provided to display infrequently
recurring events . The trigger circuit provides stable
triggering over the full range of vertical frequency response .
Section 1-214 Service ( SN B300000 & ABOVE )
The horizontal deflection system provides calibrated
sweep rates from 500 mS to 5 S per division . Uncalibrated
sweep rates , via a variable sweep magnifier , are available to
at least 5 times the indicated sweep rate for a maximum of
at least 1 S per division . Stored Automatic Enhance occurs
( in Single Sweep mode ) at sweep rates of 0.1 ms per
division and faster .
X - Y operation is provided with Ch 1 supplying the
horizontal deflection of the applied ( X ) signal , with a range
from less than 1 mV to 50 V per division ( at a reduced
bandwidth of 50 kHz ) . Ch 2 suplies the vertical deflection of
the
applied
(
Y ) signal .
The 214 is operated either from AC line voltage or from
internal
rechargeable
batteries . The
internal batteries
are
recharged from the AC power line by the integral battery
charger ( with the instrument OFF ) .
PERFORMANCE CONDITIONS
This instrument will meet the following electrical
characteristics ( Table 1-1 ) after complete calibration . These
characteristics apply over an ambient temperature range of
-15  C to + 55  C ( + 5  F to + 131  F ) when operating from
the internal batteries , and  C to + 40  C ( + 32  F to
+ 104  F ) when operating from an AC line source , except as
otherwise indicated . Warm - up time for given accuracies is at
least 5 minutes .
1-1

Specification
214
Service
( SN
B300000 &
ABOVE
)
Characteristics
Deflection Factor
Range
Accuracy
Variable
Range
Frequency
Response
AC
Coupled
Lower
Bandwidth
Input
Resistance
Input
Capacitance
1
mV / DIV to
50 mV / DIV
100
mV /
DIV to 50
V / DIV
Maximum
Input
Voltage
50
V / DIV
to 0.1
V / DIV
50
mV / DIV
to 1 mV / DIV
Chopped
Mode
Alternate Mode
Input
Impedance
Matching
1-2
Table 1-1
SPECIFICATIONS
VERTICAL
DEFLECTION
SYSTEM
Performance Requirements
1 mV / DIV to 50 V / DIV in a 1-2-5 sequence of 15 steps .
Within 
5 % with
VAR
VOLTS / DIV
control
in CAL
position and
gain
correctly
set
at 5
mV /
div
.
Continuously
variable
between
calibrated
maximum
deflection
factor
to at
least 125 V / div
.
Six
-
division , 5
-
kHz reference
signal ,
with
VAR VOLTS
/
DIV control
in
calibrated
detent .
VOLTS
/
DIV
Setting
1 mV / DIV
2
mV /
DIV
5
mV /
DIV
10
mV
/
DIV
to
50
V /
DIVb
Approximately
2
Hz.a
1
 +
5
% .a
Approximately
160 pF.a
Approximately
140
pF.a
600 V (
DC +
peak AC
) .a
600 V
peak
- to -
peak
AC ( 5
MHz or
less
) .a
aperformance
Requirement
not
checked in
manual
.
bperformance
Requirement
not
checked in
manual above 10 mV
/ DIV .
settings .
Extends
Frequency
Response
DC to
100kHz
DC
to
200kHz
DC to
400kHz
DC
to
500kHz
600 V
( DC +
peak
AC ) .a
600 V
peak -
to -
peak
AC (
not over
2
kHz or a
risetime
100 nS
) .a
To
within 10 %
.
From
500
mS / DIV to
2 mS / DIV
of time
rate at
approximately
50
kHz.a
From
1
mS
/
DIV
to
5 S
/
DIV
of
time
rate.a