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Tektronix 511A, Instruction Manual

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TABLE 

OF 

CONTENTS

SECTION I.

General 

Description.

Characteristics.

Functions 

of

 

Controls 

and

 

Binding

 

Posts.

SECTION II. OPERATING INSTRUCTIONS.

Sweep 

Circuit

 

Adjustments.

Adjustment 

of

 

sweep 

stability.

Function

 

of

 trigger

 

selector.

Adjustment 

of

 

trigger

 

amplitude.

Adjustment

 of 

sweep

 

speed.

 

Recurrent

 sweep.

Single sweep.

Ext. 

sweep 

input.

Vertical Deflection 

System.

Sweep

 

magnifier.

Video

 

amplifier.

Direct 

connection

 

to

 

deflection

 

plates.

Calibration.

Signal

 

calibrate

 

switch.

Measurement

 

of

 signal amplitudes.

Intensity

 

Modulation (Z axis).

Sweep 

Output.

Gate 

Outputs.

SECTION

 

III. CIRCUIT DESCRIPTION.

Cathode

 

Ray

 Tube

 

Circuit.

Sweep 

Chassis.

Trigger

 

phase

 

splitter.

Trigger

 

amplifier.

Trigger

 

coupling diode.

Multivibrator.

Unblanking

 

circuit.

Gate

 

output

 

generator.

Sweep 

generator.

Sweep

 

output

 cathode 

follower.

Sweep

 

magnifier.

Sweep 

amplifier.

Vertical 

Deflection 

System.

Probe.

Input 

attenuator.

Video

 

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.

WAVEFORM

 

PHOTOGRAPHS.

Deflection

 

Polarity

 

Selector

 

Waveforms.

 

Power Supply 

Waveforms.

Sweep

 

and

 

Trigger

 

Circuit

 

Waveforms.

Video

 

Amplifier

 Waveforms.

ADJUSTMENT.

Operation

 on 

210-250

 

Volt 

line.

Adjustment

 

of

 

225

 

Volt Regulated Supply.

 

Adjustment

 

of

 

Sweep

 

Speed

 

Calibration.

 

Adjustment

 

of

 

Input

 

Attenuator.

Adjustment 

of

 

Video

 Amplifier 

H.F.

 

Response.

Adjustment

 

of 

Video

 Amplifier

 L.F.

 

Response.

INTERIOR

 

PHOTOGRAPHS.

SECTION 

V. PARTS LIST.

Abbreviations.

Capacitors.

Inductors.

Resistors.

Tube

 Complement.

Switches.

Transformers.

Miscellaneous.

Warranty.

SECTION 

VI. DIAGRAMS.

Block

 

Diagram.

Sweep and Trigger 

Circuits.

Video

 

Amplifier 

and

 

CRT

 

Circuits.

Power

 

Supply

 

Circuits.

SECTION vn. VIDEO DELAY 

NETWORK.

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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