Tektronix 511A Instruction Manual Download Page 16 | Manualshive

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background image

To

cover

a

range

of

sweep

time

from

.1

sec

to

1 micro

second,

C7

has

five

values

as

selected

by

the

SWEEP

RANGE

switch.

In the

three

slowest

positions

R20A

is

returned

to

ground,

but

for

the

two

fastest

it

is

returned

to

+225

V.

This

makes

possible the

use of

a

larger

value

of

C7 than

would

otherwise

be

possible,

thus

re

ducing

the

capacity

voltage

divider

action

of

the

stray

shunt

capacities

to

ground

of

the

grid

circuit

of

V4.

Vari

ation

of

R20A

in

conjunction

with

the

five

values

of

C7

gives

a

continuously variable adjustment

of

the

multi

vibrator pulse

length.

UNBLANKING

CIRCUIT

During

the

waiting

period

the

bias

on

the

cathode

ray

tube

is

such

that

it

is

completely cut

off.

As

soon

as

a

trigger

appears

and

the

sweep

starts,

it

is

necessary

to

provide

a

positive pulse

on

the

grid

of

the cathode ray

tube

and

thus

turn

on

the

electron

beam.

This

pulse

should

have

an

extremely fast

rise

and

a

very

flat

top

so

that

the

brightness

of

the

image

is uniform. To

secure

a

pulse

of

this

nature,

the

positive pulse

from

the

multi

vibrator

is

clipped

before

it

reaches its

normal

ampli

tude

by

the

diode

V6A.

The

cathode

of

V6A

is

held at

ap

proximately

+55

V

and thus

the

plate cannot

rise

more

than

a

few

volts

above

this

value.

In

order

that

the

capacity

to

ground

of

the

cathode

ray

tube

grid and its

associated

components

and wiring

should

not

reduce

the

rate

of

rise

appreciably,

the cathode

follower

V7

is

used.

This

circuit

is

capable

of

unblanking

the tube

within

.1

microsecond

after

a

sharp

trigger

impulse

reaches

the

TRIGGER

INPUT binding post.

GATE

OUTPUT

GENERATOR

V8

serves

to isolate

the

gate

output

binding

posts from

the

multivibrator.

It

receives

a

positive

pulse

on

its

grid

of

the

same

duration

as

the

sweep

from the

plate

of

V5

via

the voltage

divider

R32

and

R33.

C

10

maintains

the

steep

sides

of

the

pulse.

Since

the

plate

and

cathode

load

resistors are

equal,

pulses

of

equal

size

but

oppo

site

polarity

appear

at

the

plate

and

cathode. The

+gate

from

the

cathode has

no

blocking

capacitor and

therefore

preserves the

square pulse

for

the

longest

sweeps.

It

was

not

felt

desirable

to

have

the

—

Gate

binding

post

carry

the

+225

V potential

of

the

plate;

therefore

a

blocking

capacitor

is

used.

SWEEP

GENERATOR

The

sweep

generator

circuit

produces

the

basic

wave

necessary

to

sweep

the beam

linearly

across

the tube

and

return

it

to

its starting

point. During

the

waiting

period

the

6AG7

tube

V9

is

held

fully

conducting since

it

has

no

bias

and

therefore its

plate

is

about

at ground

potential.

When

a

trigger

occurs

the

negative

pulse

from

the

multivibrator

cuts

the

grid of

V9

off

very

rapidly.

The

plate therefore

rises

in exponential

fashion

at

a

rate

depending

on

R20B,

R39,

and

C15.

When

the

multivi

brator

pulse

ends

V9 conducts

again,

thus

discharging

C15.

Since

C15

is

charged to

only

about

5%

of

the

supply

voltage, the

rate

of

rise

is

very

nearly linear.

Five

values

of

015

as

determined

by

the

SWEEP

RANGE

switch

in

combination

with

the

variable

resistor

R20B

provide

a

continuous

variation

in

sweep

speed

of

from

less

than .1

sec

to

1

microsecond

for

10

cm

sweep.

In

order

to

maintain

the correct

multivibrator

pulse

length

as

the

sweep

speed is

raised, the

SWEEP

RANGE

switch

changes

C7

in

the

multivibrator

and

C

15

simultaneous

ly.

Likewise

the

SWEEP

SPEED

MULT,

is

a

twin control

changing

R20A

and

R2QB

simultaneously.

To maintain

the

calibration of

the

SWEEP

SPEED MULT

dial

when

tubes

are

changed

etc.,

the

voltage

applied

to R20B

may

be

varied

by

R42

which

sets

the

grid

potential

of

the

cathode

follower

V

1

5. The

use

of the cathode

follower

in

place

of

a

potentiometer

maintains

a

constant

charg

ing

potential

as

R20B

is

varied.

Details

of

this

adjust

ment will

be

found

in

Section IV.

SWEEP

OUTPUT

CATHODE

FOLLOWER

To

provide

the

necessary

isolation

between

capaci

ties

fastened to

the

SWEEP

OUTPUT

binding

post

and

the

sweep

generator,

the

cathode

follower

V

1

0

is

pro

vided.

The

grid

of

V10

is

connected

to the

plate

of the

sweep

generator.

The

SWEEP

OUTPUT

binding

post

is

connected

,

to

the

cathode

of

V

10

without a

blocking

capacitor.

SWEEP

MAGNIFIER

The

function

of

this circuit

is

to

delay

the

start

of

the

sweep for

a

variable

time,

and

then

cause

it

to

go

at

five

times

its

normal

speed. This

is

accomplished

by

the

biased cathode

coupled

amplifier

V

1

1.

In

this

type

of

amplifier a

positive

change

in

the

grid

potential

of

V

1

1A

raises

both

cathodes

and

therefore

corresponds

to

a

negative change

on

the

grid

of

V11

B.

Thus the plate

of V1

1

gives

an

amplified

version

of the signal

on

the

grid

of V11

A,

without

change

of

polarity.

The

SWEEP

MAGNIFIER

POSITION

potentiometer

raises the poten

tial

on

the

grid

of

V

1

B above

ground

and

thus

the

cath

ode potential

of

V11A. No

sweep

appears on the plate

of V11B

until

the

plate

of

the

sweep

generator

overcomes

this

bias,

then

the

amplified

sweep

appears. Sufficient

bias

is

available

on

the SWEEP

MAGNIFIER

POSITION

to

make

it

possible

to

start

the

magnified

sweep

at any

point

on

the

normal

sweep.

V6B

is

employed

as

a

DC

restorer

to

insure

that

the

magnified

sweep

will

start at

the

same

potential

each

time,

thus

preventing

jitter

or

instability

of

the

trace. When the magnified

sweep

is

not

desired,

the

SWEEP

MAGNIFIER

POSITION

knob

is

turned to

the

OUT

position

which

operates

a

SPDT

switch

connecting the

sweep amplifier

directly

to

the

plate

of

the

sweep

generator.

SWEEP

AMPLIFIER

The

sweep

voltage

at

the

plate

of V9

is

only

about

20

V

amplitude.

To

sweep

the spot

across

the

screen,

about

350

V

is

necessary.

The

sweep amplifier provides

the

necessary

amplification

and

in

addition

converts

the

single sided

voltage

from the

sweep

generator

into

a

balanced voltage

suitable for

deflecting

the

beam.

This

balanced

voltage

is

necessary

to

maintain

the

aver

age

potential

of

the deflection

plates

constant

over the

entire

sweep,

and

thus prevent

defocussing.

The

am

TYPE

5I1-A,

511-AD

SECTION

3, PAGE 2

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Summary of Contents for 511A

Page 1: ......

Page 2: ......

Page 3: ...TYPE 511A TYPE 511AD OSCILLOSCOPE INSTRUCTION MANUAL Manufacturers of Cathode Ray and Video Test Instruments 712 S E Hawthorne Blvd Portland 14 Oregon EAst 6197 Cables Tektronix ...

Page 4: ...amplifier Calibrating circuits Power Supply SECTION IV MAINTENANCE AND ADJUSTMENT MAINTENANCE Removal of Case Cleaning Inspection Trouble Analyzing and Repair General Absence of power Absence of spot on cathode ray tube Power supply Sweep circuits Trigger circuits Video amplifier Voltage and Continuity Tables Average tube socket voltages Point to point socket continuity Transformer continuity WAVE...

Page 5: ... to 1 8 megohms and the variable control provides fill in between steps thus permitting continu ously variable adjustment of sweep speed between positions of the Sweep Range switch Since 100 dial divisions are provided for each 10 1 sweep speed range very accurate indication is obtained The sum of the Sweep Speed Mult control readings multiplied by the Sweep Range switch setting indicates the swee...

Page 6: ......

Page 7: ... Input Attenuator Frequency compensated RC type with attenuation ratios of 2 4 and 8 Vertical Deflection Sensitivity Without amplifier 27 V per cm maximum 200 V per cm minimum DC or peak to peak AC 1 Stage 2 7 V per cm maximum 40 V per cm mini mum 2 Stages 27 V per cm maximum 4 V per cm mini mum Sensitivity is reduced by a factor of 10 when probe is used In no case should the combined AC and DC in...

Page 8: ...esistors controlling time constant of sweep generator and per iod of multivibrator thereby determin ing sweep speed and duration within range set by SWEEP RANGE VERT POSITION Twin potentiometers controlling aver age potentials of vertical deflection plates and therefore the image posi tion EXT SWEEP ATTEN Potentiometer controlling the fraction of the voltage applied to EXT SWEEP INPUT binding post...

Page 9: ... DEFLECTION grid of V4 in the multivibrator circuit POLARITY This bias determines whether the sweep will operate recurrently or must be triggered Switch determining source and polari ty of trigger voltage Potentiometer controlling the bias ap plied to the trigger amplifier tube V2 and thereby determining the ampli tude of trigger signals applied to the multivibrator Binding post connecting externa...

Page 10: ......

Page 11: ... image of a sine wave appears The oscilloscope is now observing the 50 60 cycle power line waveshape To observe other waveshapes connect them to the SIGNAL INPUT binding post turn the SIGNAL CALIBRATE switch to SIGNAL select the appropriate sweep speed etc SWEEP CIRCUIT ADJUSTMENTS The sweep circuit of the Type 511A is different from the gas tube type usually employed in portable oscillo scopes It...

Page 12: ...screwdriver adjustment inside the case Pro cedure for adjustment of this control will be found in Section IV RECURRENT SWEEP In case it is desirable to have a sweep without using any sort of trigger merely advance the SWEEP STABILI TY control until a stable sweep is obtained This sweep is the conventional sawtooth variety as used in most oscilloscopes SINGLE SWEEP The triggered sweep circuit used ...

Page 13: ... if desired by in creasing L6 and readjusting L7 L8 L9 and L10 but overshoot will occur on steep wave fronts With opti mum transient response the rise time 10 to 90 of full amplitude is 04 microseconds or better At the low frequency end of the band the top of a 10 000 micro second square pulse will not depart by more than 5 from flatness The deflection sensitivity is approximately 2 7 V per cm pea...

Page 14: ... calibration volt age is now equal to the signal amplitude CAUTION IF THE INPUT PROBE ATTEN 10X IS USED THE SIGNAL AMPLITUDE IS EQUAL TO TEN TIMES THE CALIBRA TION VOLTAGE The scale on the CAL VOLTAGE potentiometer is calibrated in peak to peak volts If a sine wave is being measured this may be converted to R M S by dividing by 2 828 If a voltmeter is used to measure the CAL OUTPUT remember to mul...

Page 15: ...witch is in the INT or EXT positions signals are taken off the cathode of V1 and do not change in polarity Therefore a positive impulse must be supplied by the external source or video amplifier as the case may be With the TRIGGER SEL in the INT or EXT positions signals are taken off the plate and reversed in polarity thus providing the required positive output from negative trigger sources TRIGGE...

Page 16: ...the rate of rise is very nearly linear Five values of 015 as determined by the SWEEP RANGE switch in combination with the variable resistor R20B provide a continuous variation in sweep speed of from less than 1 sec to 1 microsecond for 10 cm sweep In order to maintain the correct multivibrator pulse length as the sweep speed is raised the SWEEP RANGE switch changes C7 in the multivibrator and C15 ...

Page 17: ...impedance of 10 megohms shunted by 14 mmfd CAUTION ALTHOUGH THE PROBE IN TRODUCES A SIGNAL ATTENUATION OF 10 TIMES IT SHOULD NOT BE CON NECTED TO CIRCUITS WITH PEAK VOLT AGES EXCEEDING 600 VOLTS INPUT ATTENUATOR All signals and calibrating voltages pass through a four position RC compensated attenuator having at tenuation ratios of 1 2 4 and 8 If a conventional resis tance voltage divider is shunt...

Page 18: ...l of the 60 cycle power The principal power supply provides 225 v at approximately 250 ma Two 5V4G tubes are used as rectifiers The comparatively low voltage drop of these tubes reduces the no load voltage to which the input capacitors may be subjected A large input capacitor 80 mfd reduces the ripple to about 12 volts The elec tronic regulator reduces this to less than 1 volts This circuit consis...

Page 19: ...uld be checked for serious discoloration which would indicate excessive dissipation and there fore faulty operation A moderate amount of discolora tion is normal 3 Connections Loose screws or nuts should be tightened This is especially important when the screw serves as an electrical connection Corrosion of the chassis and electronic components is unlikely under normal conditions It should be remo...

Page 20: ...ION control centered the HOR POSITION control clockwise the SWEEP STABILITY control counter clockwise and no vertical input signal measure the voltage between each CRT deflection plate and ground which should be within 60 volts The average potential of both horizontal X plates or both vertical Y plates should be within 40 volts of ground when measured under the above conditions Abnormal potential ...

Page 21: ...ASS 2 Sweep Generator Faulty operation of the sweep generator is indicated when the multivibrator output is normal fig 12 and the sawtooth at the plate of V9 fig 21 is not If the sawtooth amplitude is low slow sweep speed V9 is known to be good and circuit volt ages appear normal remove V9 and measure the volt age at terminal 4 of V9 socket which should be between 5 and 30 volts This measurement i...

Page 22: ...riation of in put capacity it is desirable to check the adjustment of C44 as explained in the Adjust of Input Attenuator section If satisfactory waveshape cannot be obtained try another 6AG7 2 C39 C51 These electrolytic capacitors are em ployed in the low frequency compensating circuits and should be replaced if the range of R99 and R116 be comes insufficient to properly compensate the amplifier I...

Page 23: ...Y Centered AVERAGE TUBE SOCKET VOLTAGES Measured at 117 volt line DC voltmeter sensitivity 20 000 ohms per volt Tube Pin To Voltage V1 1 2 Gnd 0 3 5 Gnd 15 5 4 Gnd 7 50 volt scale 6 Gnd 187 7 Gnd 6 5AC 8 Gnd 177 V2 1 2 Gnd 0 3 5 Gnd 10 TRIGGER AMPL clockwise 3 5 Gnd 0 TRIGGER AMPL counter clockwise 4 Gnd 0 TRIGGER AMPL clockwise 4 Gnd 20 TRIGGER AMPL counter clockwise 50 volt scale 6 Gnd 225 7 Gnd...

Page 24: ...TY counter clockwise V10 3 Gnd 0 4 Gnd 6 5AC 5 Gnd 225 6 Gnd 65 SWEEP STABILITY clockwise 6 Gnd 3 2 SWEEP STABILITY counter clockwise 7 Gnd 70 SWEEP STABILITY clockwise 7 Gnd 16 SWEEP STABILITY counter clockwise V11 1 Gnd 156 MAGNIFIER POSITION out 1 Gnd 145 MAGNIFIER POSITION clockwise 2 Gnd 135 MAGNIFIER POSITION out 2 Gnd 110 MAGNIFIER POSITION clockwise 3 Gnd 0 4 Gnd 6 5AC 5 Gnd 2 5 MAGNIFIER ...

Page 25: ... Gnd 29 DEFLECTION POLARITY down 2 Gnd 6 5AC 3 Gnd 0 4 Gnd 23 DEFLECTION POLARITY up 50 volt scale 4 Gnd 20 DEFLECTION POLARITY center 50 volt scale 4 Gnd 17 5 DEFLECTION POLARITY down 50 volt scale 6 Gnd 160 DEFLECTION POLARITY up 6 Gnd 195 DEFLECTION POLARITY center 6 Gnd 165 DEFLECTION POLARITY down 7 Gnd 0 8 Gnd 110 DEFLECTION POLARITY up 8 Gnd 150 DEFLECTION POLARITY center 8 Gnd 200 DEFLECTI...

Page 26: ...5AC 5 450 18 6 225 46 V27 1 4 225 38 2 5 Gnd 325 3 6 Gnd 225 7 Gnd 6 5AC 8 Gnd 0 V28 1 Gnd 87 2 7 Gnd 89 3 Gnd 0 4 Gnd 6 5AC 5 225 38 6 Gnd 137 V29 1 Gnd 89 4 Gnd 0 V30 2 Gnd 150 5 Gnd 0 V31 1 7 Gnd 17 2 Gnd 2 4 3 Gnd 0 4 Gnd 6 5AC 5 Gnd 225 6 Gnd 140 V32 2 Pin 7 1 25AC Measured with thermocouple meter 7 Gnd 1600 V33 2 Pin7 1 25AC Cap Gnd 1500 POINT TO POINT TUBE SOCKET CONTINUITY Tubes in Sockets...

Page 27: ...225 75K SWEEP STABILITY clockwise 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 9 5K V5 1 Gnd 0 2 Gnd 0 3 Gnd 0 4 Gnd 200K SWEEP SPEED MULT clockwise 4 Gnd 2 2M SWEEP SPEED MULT counter clockwise 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 4 5K 8 V4 pin 4 80K V6 1 Gnd 35M 1 V11 pin6 470 2 140 85K 2 V5 pin 8 78K 3 Gnd 0 4 Gnd 0 5 Gnd 14K 5 225 20K 6 7 Gnd 0 V7 1 2 3 Gnd 0 4 Gnd 0 5 225 0 6 V6 pin 2 0 7 G...

Page 28: ...K V14 1 Gnd 0 1 Gnd 90K 2 7 140 11K 3 Gnd 0 4 Gnd 0 5 6 450 25K V15 1 0 450 0 3 450 2 4 450 0 5 450 0 6 450 240K to 6 450 0 7 V9 pin 8 200K 7 V9 pin 8 2 2M V16 1 3 2 Gnd 0 4 Gnd IM 5 7 Gnd 0 6 225 10K 8 225 3 2K V17 1 3 5 Gnd 2K 2 Gnd 0 4 Gnd IM 6 225 0 7 Gnd 0 8 225 1 5K SWEEP MAGNIFIER POSITION out HOR POSITION clockwise HOR POSITION counter clockwise 480K depending on setting of R 42 with SWEEP...

Page 29: ... panel 0 8 Y1 access panel 0 9 140 0 ASTIGMATISM control clockwise 9 225 0 ASTIGMATISM control counter clockwise 10 X2 access panel 0 11 X1 access panel 0 14 V20 pin 1 2 V21 1 T1 term 7 0 2 3 7 T1 term 11 0 4 T1 term 10 0 6 T1 term 9 0 V22 2 T1 term 13 0 4 6 T1 term 14 0 8 225 IK V23 2 V22 pin 2 0 4 6 T1 term 16 0 8 V22 pin 8 0 V24 1 6 140 4 5K 3 T1 term 17 0 4 7 T1 term 16 0 V25 1 V25 pin 5 470K ...

Page 30: ...INUITY T1 Measured with leads disconnected T2 Measured with V32 and V33 removed from sockets Terminals Ohms Resistance 20 C From To Ohms Resistance 20 C 1 to 3 1 7 V31 pin 5 225 2 to 4 1 7 15 3 5 to 6 3 junction C74 C75 225 2 8 7 to 8 147 V32pin2 V32 pin 7 03 8 to g 150 V33 pin 2 V33 pin 7 03 10 to 11 27 V33 pin 7 Gnd 1175 12 to 13 03 14 to 15 10 8 15 to 16 10 9 16 to 17 21 18 to 19 025 20 to 21 6...

Page 31: ...nts in the Type 511 A under test 5 Variations in control settings of the 511 A under test 6 Line voltage variations DEFLECTION POLARITY SELECTOR WAVEFORMS Normal operation of this circuit for observation of pulses is shown in the following photographs The saw tooth pulse has a duration of 1 millisecond and a 60 cycle repetition rate Fig 1 Sawtooth pulse with DEFLECTION POLARITY switch in the up po...

Page 32: ...plitude 12 volts Fig 8 Waveform at V31 plate Amplitude 350 volts Fig 7 High voltage supply oscillator waveform at V31 grid Amplitude 75 volts SWEEP AND TRIGGER CIRCUIT WAVEFORMS Fig 9 Multivibrator waveform at V4 grid with con Fig 10 Multivibrator waveform at V4 plate controls set trols set for 10 µsec recurrent sweep Amplitude for 10 µsec recurrent sweep Amplitude 120 70 volts volts TYPE 511 A Sl...

Page 33: ... 45 volts Fig 15 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 16 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 17 Unblanking pulse at V7 cathode 1000 µsec re current sweep Amplitude 70 volts Fig 18 Unblanking pulse at V7 cathode 10 µsec re current sweep Amplitude 65 volts Fig 19 Unblanking pulse at V7 cathode 1 µsec recur rent sweep Amplitude 65 volts...

Page 34: ...et ting of SWEEP MAGNIFIER POSITION control Amplitude 30 volts Fig 24 Amplified sweep sawtooth at X1 deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 25 Amplified sweep sawtooth at X2 deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 26 1 µsec negative pulse at V1 grid from either video amplifier or TRIGGER INPUT Amplitude 5 volt Fig 27 The same pulse at V2 grid Nega...

Page 35: ...requency compensation is insufficient also in dicating need for L F adjustment Fig 32 Normal response to 1 megacycle square wave Fig 33 Response to 1 megacycle square wave showing overshoot due to excessive high frequency com pensation Readjustment is indicated Fig 34 Response to 1 megacycle square wave showing the effect of insufficient high frequency compen sation Fig 36 Response to 1 kilocycle ...

Page 36: ......

Page 37: ...alues used in the capacity divider each divider incorporates a variable ceramic trimmer capacitor in one arm To make the input capac ity of each amplifier and that of the attenuator equal similar capacitors are shunted across these circuits also The easiest way to make these adjustments is to send a square wave through the attenuator and observe the resulting waveshape on the oscilloscope itself W...

Page 38: ...ned 6 If it is not possible to obtain a satisfactory wave shape increase the inductance of L10 and repeat steps 4 and 5 7 Move the INPUT CHAN SEL to 2 STAGES and readjust the amplitude of the input signal for the same deflection as before 8 Adjust L4 and L5 for best waveshape The bandwidth may now be measured if desired For the 1 STAGE position the response should be flat to about 5 mc sloping gra...

Page 39: ...ALLIGATOR CLIP BANANA PLUG INSULATOR Fig 41 Input Probe disassembled SECTION 4 PAGE 21 TYPE 511 A 511 AD ...

Page 40: ...Fig 42 Interior view right front side SECTION 4 PAGE 22 TYPE 511 A 511 AD ...

Page 41: ...X Fig 43 Interior view left side SECTION 4 PAGE 23 TYPE 511 A 511 AD ...

Page 42: ...E CI5E Fig 44 Sweep chassis bottom view R63 C2I TYPE 511 A 511 AD SECTION 4 PAGE 24 ...

Page 43: ...SECTION 4 PAGE 25 TYPE 511 A 511 AD ...

Page 44: ...R99 C48 C5O R98 R97 RIOI 102 RI34 C55 L6 RII5 RI2I RI22 C53 RII6 RII8 RIOO VI6 R RIO6 RII2 Rill L7 Rill I VI9 C54 LIO RI28 C56 RI27 I RI27 RI26 I RI26 L9 R110 C5I Fig 47 Video Amplifier bottom 7 7 fo ro t3 ro N ro Popppu bi ro Fig 46 Video Amplifier top TYPE 511 A 511 AD SECTION 4 PAGE 26 ...

Page 45: ...067 072 Rl R 156 R 150 25 26 C69 RI5I 152 Fig 48 Power Supply bottom view 450 6 3 225 140 660 6 3 XIO SW SW o Fig 49 Power Supply top view SECTION 4 PAGE 27 TYPE 511 A 511 AD ...

Page 46: ...Sll A S il AD SECTION 4 PAGE 28 Fig 51 Vertical Attenuator bottom RI23 RI2O 2 R 120 1 RI20 RII9 I RIO Fig 50 Vertical Attenuator top Fig 52 Deflection Polarity Switch and Terminal Board ...

Page 47: ...Km SECTION 4 PAGE 29 TYPE 511 A 511 AD C9 CIOA v LI 1 L LP4 ...

Page 48: ......

Page 49: ...B Fixed EMC 2x20 µf 20 50 450 WVDC C15AA Fixed Mica or Cer 12 µµf 10 400 WVDC C15A Var Cer 7 45 µµf 500 WVDC C15B Fixed PT 920 µµf 2 Selected 400 WVDC 23 C15C Fixed PT 01 µf 2 Selected 400 WVDC 23 C15D Fixed PT 1 µf 2 Selected 400 WVDC 95 C15E Fixed PBT 1 µf 2 Selected 200 WVDC 2 55 C16 Fixed Mica 100 µµf 10 400 WVDC C17 Fixed PT 1 µf 10 400 WVDC C18 Fixed Mica 100 µµf 10 400 WVDC C19A B Fixed PBT...

Page 50: ... 2x20 20 50 450 WVDC C69 Fixed PT 01 µf 20 400 WVDC C70 Fixed PT 01 µf 20 400 WVDC C72 Fixed PT 01 µf 20 400 WVDC C73A B Fixed EMC 2x20 µf 20 50 450 WVDC C74 Fixed PT 01 µf 400 WVDC C75 Fixed Mica 006 µf 10 500 WVDC g76A rxp UJ µl ZU o zUUU WVJJO 8 C76B pif QX f onnn unnv an C77 Fixed PMC U j 5 µt uf ZjU O 20 ZUUU WVU 2000 WVDC 0 4 05 C76C D 2 x 05 µf 20 2000 INDUCTORS L1 Fixed 35 microhenries 10 ...

Page 51: ... R34 Fixed Comp 1 watt 10K 10 R35 Fixed Comp 1 watt 10K 10 R36 Fixed Comp 72 watt 47 ohm 10 R37 Fixed Comp 72 watt 120 K 10 R38 Fixed Comp 72 watt 100 K 10 R39 Fixed Dep Carb 2 watt 200 K 2 R39 1 Fixed Comp 72 watt 33 meg 10 R40 Fixed Comp 72 watt 470 ohm 10 R41A Fixed Comp 2 watt 10K 10 R41B Fixed Comp 2 watt 10K 10 R42 Var Comp 74 watt 500 K 20 R43 Fixed Comp 72 watt 1 meg 10 R44 Fixed Comp 72 w...

Page 52: ...92 Fixed WW 5 watt 2K 5 R93 1 Fixed Comp 1 watt 680 ohm 0 5 0 5 26 R93 2 Fixed Comp 1 watt 560 ohm R94 Fixed Comp 72 watt 47 ohm 10 R95 Fixed Comp 1 watt 10K 10 R96 Fixed Comp 72 watt 9 1 meg 5 R97 Fixed Comp 72 watt 9 1 meg 5 R98 Fixed Comp 72 watt 220 K 10 R99 Var Comp 74 watt 500 K 20 R100 Fixed Comp 72 watt 220 K 10 R101 Fixed Comp 72 watt 100 ohm 10 R102 Fixed Prec 72 watt 1 meg 1 33 R103 Fix...

Page 53: ...d Comp watt 1 5 meg 10 R137 Fixed Comp watt 1 5 meg 10 R138 Fixed Comp 2 watt 120K 10 R139 Fixed Comp 2 watt 4 7 meg 10 R140 Var Comp watt 2 meg 20 R141 Fixed Comp watt 1 5 meg 10 R142 Var Comp watt 500 K 20 R149 Fixed WW 25 watt 1K 5 R150 Fixed Comp watt 470 K 10 R151 Fixed Comp watt 150 K 10 R152 Fixed Comp watt 47 K 10 R153 Fixed Comp 1 watt 220 K 10 R154 Fixed Comp 72 watt 1 meg 5 R155 Fixed C...

Page 54: ...ector Rotary 1 Section 1 Pole 5 Position 1 02 S2 Sweep Range Rotary 5 Section 6 Pole 6 Position Front Sections 2 50 Rear Sections 1 25 S3 Signal Calibrate Rotary 2 Section 2 Pole 5 Position 1 20 S4 Input Attenuator Rotary 2 Section 2 Pole 4 Position 1 70 S4 Input Attenuator completely assembled and wired including S4 C31 C32 C33 C34 C35 C36 C37 C38 R79 R80 R82 R83 R84 and R85 12 50 S5 Input Channe...

Page 55: ...ally available through electronics parts distributors WARRANTY This instrument is guaranteed to the original user to be free from defects in material and workmanship for a period of one year from date of purchase Our respon sibility under this warranty is limited to the repair or replacement of the instrument or any part thereof fail ure of which is not due to abuse For service under this warranty...

Page 56: ......

Page 57: ...TRIGGER INPUT SIGNAL INPUT CAL INPUT EXT SWEEP CAL OUTPUT K VOLTAGES j TO C R T 1 FROM J LINE BLOCK DIAGRAM OF TYPE 5IIA CATHODE RAY OSCILLOSCOPE ...

Page 58: ......

Page 59: ...TRIGGER AMPLIFIER MULTIVIBRATOR SWEEP GENERATOR SWEEP MAGNIFIER SWEEP AMPLIFIER ...

Page 60: ......

Page 61: ...VALUES I AND GREATER ARE MMFDS UNLESS OTHERWISE MARKED AVERAGE SUPFLY CURRENT AT CHASSIS TERMINAL BLOCK 140 V SUPPLY 0 8 MA 225 V SUPPLY 126 MA TEKTRONIX INC TYPE St A VERTICAL AMPLIFIER ______ AND CRT CIRCUITS DATE 4 18 80 DR BY a X CH BY ...

Page 62: ......

Page 63: ...90 MA 14 MA 6 3 o 450 6 3 V TO V26 23 3V TO CRT FIL 6 1 fl I55 s I MEG if T V26 oSW 7 4 oSW C73BI 2OMFTB ADJ TO 225 V R 162 470 K 0 225 0 140 600 o 6 3 oXIO CAL 1800V TO CRT A3 V32 IB3S OI6 820 K IOOK ORT FIL 05MF 1500V C76A 05 MF C76B I5K 6 P V3 6AQ5 7 TEKTRONIX INC POWER SUPPLY TYPE5IIA CATHODE RAY OSCILLOSCOPE DATE 4 18 50______________________ DR BY ch BY Z c 76 c xx t 5 c 7 D ...

Page 64: ......

Page 65: ...eeded it may be re moved from the circuit by means of a rotary switch operated from the front panel ADJUSTMENT AND MAINTENANCE If the Vert Ampl Atten potentiometer R107 or the limiting resistor R108 are replaced it may be necessary to change the delay network shunt resistance so that the correct termination is maintained To check for proper termination set the sweep speed at 3 to 10 microseconds a...

Page 66: ...Ceramic Ceramic 12 3 12 1 5 7 INDUCTORS mmf mmf mmf 10 10 10 500 WVDC 500 WVDC 500 WVDC RESISTORS R1 Fixed Composition watt 270 ohm 10 R2 Fixed Composition watt Selected SWITCH S1 l AD 25 in out DPDT Rotary RELAY RL1 l D 25 Type 227A DPDT 32VDC 1000 ohm NOTE L l TO L 12 INCLUSIVE ARE COAXIALLY WOUND ON THE SAME COIL FORM L I3TOL 23 ii SECTION 7 PAGE 2 ...

Page 67: ...SIGNAL INPUT CAL INPUT which may be used as an alternate signal input or any of six calibrating ranges from 3V to 100V peak to peak Continuously variable control for each range is provided by means of the CAL VOLTAGE potentiometer R76 1 Refer to Section II Calibration for operating in structions which still pertain except that the calibration ranges now represent full scale readings of the CAL VOL...

Page 68: ......

Page 69: ...AVERAGE CURRENT AT TERMINAL BLOCK 225 V SUPPLY 190 MA 140 V SUPPLY 14 MA _ L V25 J 6AQ5 TEKTRONIX INC POWER SUPPLY TYPE5IIA CATHODE RAY OSCILLOSCOPE DATE 4 18 50______________________ DR BY CH BY ...

Page 70: ......

Page 71: ......

Page 72: ...TRIGGER INPUT SIGNAL INPUT CAL INPUT CAL OUTPUT VOLTAGES j TO C R T 1 FROM J LINE BLOCK DIAGRAM OF TYPE 5IIA CATHODE RAY OSCILLOSCOPE ...

Page 73: ...G PLATE VI7 6 3 V 51 TRIGGER SELECTOR 52 SWEEP RANGE NOTE CAPACITOR VALUES LESS THAN I ARE MFD3 VALUES I AND GREATER ARE MMFDS UNLESS OTHERWISE MARKED 6 Ext sweep input 140 v X 600V Xg 140 V C R T GRID 0 6 gate gate d SWEEP1 output TEKTRONIX INC TYPE 5IIA SWEEP GENERATOR DATE 4 18 50 DR BY CH BY X ...

Page 74: ...IA COND o I STAGE AMPL ATTEN 220 K 470 K CAL OUTPUT 140 V TO SIA I NT SYNC 6 3 V CAPACITOR VALUES LESS THAN I ARE MFDS VALUES I AND GREATER ARE MMFDS UNLESS OTHERWISE MARKED AVERAGE SUPPLY CURRENT AT CHASSIS TERMINAL BLOCK 140 V SUPPLY 0 3 MA 225 V SUPPLY 128 MA L7 L9 A Rill 330 RI26 330 Rlll l 330 R 126 1 330 RII2 330 RI27 330 RII2 I 330 RI27 I 330 4 7 M focus I500V CATHODE OF V7 CRT CATHODE 1800...

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