Tektronix 323 Instruction Manual Download Page 65

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Maintenance— Type 3 2 3

Sweep G enerator Troubleshooting Chart.

In itia l setup:

D isplay is o b ta in a b le 1'in EXT HORIZ mode; VOLTS/DIV set a t 5 DIV CAL;

T IM E /D IV a t .5 mS; POSITION controls “ in ” a n d centered; POWER — O N ; VARIABLE controls a t CAL; TRIGGER a t + AUTO; T rig /
H oriz C oupling switch a t INT — AC.

4-9

Fig. 4 -6 . Sweep G enerator troubleshooting chart.

Summary of Contents for 323

Page 1: ...IV IA IS I U A L TYPE 323 OSCILLOSCOPE Tektronix Inc S W Millikan Way P O Box 500 Beaverton Oregon 97005 Phone 644 0161 Cables Tektronix 070 0750 00 268 ...

Page 2: ...ed directly to the field therefore all requests for repairs and re placement parts should be directed to the Tektronix Field Office or representative in your area This procedure will assure you the fastest possible service Please include the instrument Type and Serial or Model Number with all requests for parts or service Specifications and price change privi leges reserved Copyright 1968 by Tektr...

Page 3: ...t Abbreviations Parts Ordering Information Electrical Parts tist Mechanical Parts List Information Section Mechanical Parts List Section 9 Diagrams List Illustrations Mechanical Abbreviations and symbols used in this manual are based on or taken directly from IEEE Stand ard 260 Standard Symbols for Units MIL STD 12B and other standards of the electronics industry Change information if any is locat...

Page 4: ...Type 323 Fig 1 1 Type 323 Oscilloscope ...

Page 5: ...eration and 14 watts maximum when operated from an AC line Operation from an AC line also provides full or trickle charging for the internal batteries The electrical characteristics which follow are divided into two categories The instrument is checked in the Per formance Requirement and Calibration sections of this manu al against the characteristics listed in the Performance Re quirement column ...

Page 6: ...her VOLTS DIV switch positions 0 C to 55 C Peak aberrations not to exceed 3 or 3 total peak to peak aberrations not to exceed 3 15 C to 0 C Peak aberrations not to exceed 4 or 4 total peak to peak aberrations not to exceed 4 Positioning effect on aberrations Negligible with signal on screen Probe effect on aberrations Negligible Overload Recovery 0 C to 40 C One microsecond or less to stabilize af...

Page 7: ...h temperature change from 1 5 C to 55 C TRIGGERING Trigger Source Internal or external Trigger Coupling Internal AC capacitive coupled AC capacitive coupled low frequency re ject Selected by front panel Trig Horiz Cou pling switch External AC capacitive coupled DC direct coupled Trigger Mode Manual triggering adjustable for desired level Automatic triggering at average level of triggering waveform...

Page 8: ...t di visions of graticule 5 cs to 0 2 s DIV Within 3 VARIABLE TIME DIV control set to CAL 0 5 s to 1s DIV Within 4 Magnified Time Measurment Ac curacy over center eight di visions of graticule equivalent magnified sweep rates given 2 microseconds to 20 millisec onds division Within 4 VARIABLE TIME DIV control set to CAL Exclude first two and last two divisions of total magnified sweep length at 0 ...

Page 9: ...ter Dynamic range At least 20 divisions 2 5 volts to 2 5 volts with X10 HORIZ MAG switch pulled out EXT TRIG OR HORIZ ATTEN switch set to 10X EXT HORIZ VAR control set to CAL Dynamic range is reduced when any of these controls are changed from the above positions CALIBRATOR Waveshape Square wave Output Voltage Zero to 0 5 volts peak to peak Repetition Rate 750 hertz Accuracy Voltage 20 C to 30 C 1...

Page 10: ...g nal displayed full intensity Typical power consumption at normal intensity 1 6 watts with calibrator signal applied Battery Operation Batteries Six size C nickel cadmium cells Charge time Power Pack switch set to FULL CHG At least 16 hours Operating time batteries charged at 20 C to 25 C operated at 20 C to 30 C 10 microamperes or less cathode current low intensity Calibrator waveform displayed ...

Page 11: ...ases 1 C 1000 feet increase in alti tude between 15 000 and 30 000 feet Non operating storage Tested to 50 000 feet Humidity Non operating Five cycles 120 hours of Mil Std 202C Method 106B Exclude freezing and vibration Vibration Operating and non operating 15 inutes along each of the three major axis at a total displacement of 0 025 inch peak to peak 4 g at 55 c s with fre quency varied from 10 5...

Page 12: ...1 2 inches 21 59 centi meters 9 inches 22 86 centimeters with AC power cord install ed Length Handle extended 13 inches 33 02 centimeters Handle not extended 10 inches 27 05 centi meters Net Weight Approximately 63 4 pounds 3 06 kilograms without ac cessories Connectors VERT INPUT and EXT TRIG OR HORIZ INPUT BNC CAL OUT EXT BLANK and EXT DC POWER Banana jack AC POWER Special three pin connector co...

Page 13: ...ts a 5 division reference square wave signal for calibration purposes The following controls connectors and indicators are contained on or are accessible through the exterior surfaces of the Type 323 Oscilloscope and are intended to be used during routine oscilloscope operation All other controls are contained inside the covers and should be moved only dur ing instrument calibration The names of a...

Page 14: ...Operating Instructions Type 323 2 2 Fig 2 1 External controls connectors and indicators ...

Page 15: ...o the CRT horizontal deflection plates Coarse and fine control potenti ometers with a 10 1 ratio are connected to the POSITION shaft The fine control has 30 of rotation independent of the coarse control This back lash arrangement per mits the use of a single knob for coarse and fine adjustments with the coarse ad justment during X I HORIZ MAG being equal to the fine adjustment during X10 HORIZ MAG...

Page 16: ...N Two position slide switch When in 10X position it attenuates the EXT TRIG OR HORIZ INPUT signal by a factor of 10 INPUT BNC connector with 62 pF input capaci tance Capacitance changes slightly when ATTEN is at 10X Has 1 MU input resis tance whenever the Trig Horiz coupling switch is at DC or when the EXT TRIG OR HORIZ ATTEN switch is at 10X Maxi mum allowable input is 500 V DC peak AC EXT BLANK ...

Page 17: ...d through the AC power source when the adapter is in use A separate grounding connection must be used Panel Cover A friction fit keeps this cover over the front panel during storage or transporting The cover can be placed over the rear of the Oscilloscope for storage when the Oscilloscope is in use The recess in the cover accom modates the accessory pouch strap and should not be used as a finger g...

Page 18: ...g scrow AC power connection Blk on wht Wht Grn on wht Interconnecting leads H i ll I H 1 1 5 V terminals 230 V terminals Fuse location pull cover straight down to expose fuse align cover detents and fuse mounting base when roplacing cover Positioning lugs 2 6 Fig 2 2 Power Pack removal ...

Page 19: ... are contained inside the Oscilloscope adjacent to the side con trol panel The following procedure explains the Power Pack removal connection changes and Power Pack replace ment Power Pack Removal Disconnect all cables from the Oscilloscope and place the Oscilloscope Power Pack switch at EXT DC Remove the cover securing screw from the back of the case See Fig 2 2 A Grip the front edge of the Oscil...

Page 20: ...Cd batteries is not recommended as a common practice occasional partial recharges can be tolerated About 30 to 45 minutes of operating time can be expected as a result of a 1 hour charge period The energy storing capability of the NiCd cells decreases gradually with age and the number of charge discharge cycles However the battery should provide a useful operat ing life well in excess of several h...

Page 21: ... CRT Readjust INTENSITY and FOCUS for optimum presentation Use the minimum CRT intensity necessary for good viewing to conserve battery power Operating the Vertical Controls 4 Adjust the vertical POSITION control to center the square wave observe 5 divisions 0 15 division display amplitude 5 Adjust the horizontal POSITION control to start the trace at the left 0 div vertical graticule line 6 Gradu...

Page 22: ...es to 2 division Again calculate the input signal amplitude 0 5 V 14 Pull the X10 VERT GAIN control out Note that the display amplitude increases to 5 divisions Compute the display amplitude by using the following procedure Divide the VOLTS DIV setting by 10 to determine the vertical deflection factor with the X10 VERT GAIN out Multiply this deflection factor by the number of divisions of deflecti...

Page 23: ...addles the graticule centerline during X I horizontal operation 20 Rotate the VARIABLE TIME DIV slowly ccw Note that the resultant decrease in sweep speed causes more square waves to appear With VARIABLE fully ccw approx imately 4 square wave appear Return the VARIABLE con trol to CAL and the X10 HORIZ MAG to in Operating the Trigger Controls 21 Note that the positive portion of the square wave is...

Page 24: ...TRIG OR HORIZ AC The straight diagonal line rising as it progresses from left to right is indicative of in phase conditions existing between the signals at the vertical and horizontal input con nectors The deflection along the vertical and horizontal coordinates is dependent upon the amplitude of the re spective input signals and the deflection factors involved 29 Rotate the EXT HORIZ VAR counterc...

Page 25: ...ement should be made from trace center to trace center to avoid the effect of trace width ADJUST VERT X I GAIN to provide a 5 division square wave presentation VERT X lO GAIN Pull the X lO VERT GAIN control out CHECK The square wave presentation has 5 divisions 0 15 division vertical amplitude ADJUST VERT X lO GAIN to provide a 5 division square wave presentation SIGNAL TRANSPORTING METHODS ADJUST...

Page 26: ...the circuit becomes negligible and circuit performance is not affected Signal Frequency Versus Signal Source Capacitance and Oscilloscope Input Capacitance The 47 pF oscilloscope input capacitance is of little con cern when measuring DC or low frequency signals How ever as frequency increases the oscilloscope input capac itance in parallel with the signal source lowers the effective load impedance...

Page 27: ...tion Use DC blocking capacitor between source and termi nation reflections from oscilloscope input imped ance Terminated coaxial cable with coaxial attenuator be tween source and termina tion Less reflection from oscil loscope input impedance increased voltage range Reduces oscilloscope sen sitivity Coaxial cable with BNC connectors BNC coaxial attenuator BNC termi nation Termination value typ ica...

Page 28: ...e unit to be elevated to the voltage of the applied signal Reference or ground lead Reliable signal observations cannot be made unless both the oscilloscope and the unit under test are connected together by a reference ground lead in addition to the signal lead See Fig 2 11 Most AC operated equipment has a common ground supplied by the AC power source circuitry This is true of the Type 323 Oscillo...

Page 29: ...amples in Fig 2 13 B use internal triggering and give the indication that the positive spike is coincident with the rising portion of the square wave The examples given in Fig 2 13 A both use the same external trigger source and show that the square wave actually goes negative at the time the positive spike occurs External triggering is extremely useful in measuring phase difference between signal...

Page 30: ...Use the horizontal sweep rate position and magnifier controls as necessary to view the slope b Use the opposite slope to trigger the sweep select the sweep rate which displays the point to be observed as near to the right of the sweep as possible use the Hori zontal VARIABLE control if calibrated measurement is not required using the Horizontal POSITION control set the point of interest to the cen...

Page 31: ...l to horizontal frequency ratio of 3 2 H Vertical to horizontal frequency ratio of 2 1 J Vertical to horizontal frequency ratio of 3 1 Fig 2 15 Lissajous figures A through E X and Y inputs having same frequency but different phase angles FI through J X and Y inputs having different frequencies which have a common divisor Vertical to horizontal ratio is determined by the ratio Ih to lv where lb is ...

Page 32: ...ndition existing when a capacitor is inserted between the signal pickoff point and the circuit to which the signal is applied Accelerating Voltage A voltage applied to components within a cathode ray tube to accelerate beam electrons during their passage from cathode to phosphor screen Astigmatism Any deviation from a circular appearance of the electron beam spot Also the control which corrects fo...

Page 33: ...ese plates creates an electro static field which controls horizontal vertical or blanking deflection of the electron beam Deflection Polarity The relation between signal polarity and spot displacement direction The Type 323 Oscilloscope has a positive deflection polarity indicating upward and right deflection in response to vertical and horizontal input signals respectively Deflection Sensitivity ...

Page 34: ...lopes of an electrical pulse Usually meas ured at the 50 amplitude points Push Pull Currents or voltages which are equal in ampli tude but opposite polarity Also defines a circuit which has that type of response Reflection A signal caused by reflected signal energy Usually thought of as energy returned by a transmission line which is not terminated in its characteristic impedance or which has impe...

Page 35: ... circuit in response to a change in input Transition A voltage shift commonly refers to the step function of a square wave Trigger A pulse used to initiate some function In oscillo scopes commonly refers to the signal which initiates the horizontal sweep Triggered Sweep A sweep that can be initiated only in re sponse to a trigger as opposed to a free running sweep Triggering Level The instantaneou...

Page 36: ...es a Sweep Gate circuit This causes the Sweep Generator circuit to develop a linear sawtooth voltage which drives the Horizontal Am plifier The Horizontal Amplifier increases the amplitude of the sawtooth voltage as necessary to provide slightly more than ten division of horizontal deflection when the voltage reaches its peak When the sawtooth voltage out of the Sweep Generator rises sufficiently ...

Page 37: ...s Q91 and Q99 decreasing the cur rent in one side as the current increases in the other The result is a change in the quiescent reference vertical posi tion of the trace The Limiter D86 D87 D88 D89 decouples the Buffer Am plifier from the Paraphase Amplifier during overdrive con ditions This prevents the Output Amplifier from being driv en to a non linear operating region during overdrive condi ti...

Page 38: ... Refer to the Vertical Preamplifier schematic The multi vibrator square wave output is taken from the collector of Q9 and applied to the D11 D12 switching circuit When Q9 is cut off D11 is back biased by the positive potential at the Q9 collector Current flows through R12 D12 and R15 to provide 0 5 V 05 V and 005 V at the top of R17 R18 and R19 respectively When Q9 conducts D ll also goes into con...

Page 39: ...Circuit Description Type 323 3 4 Fig 3 3 Paraphase Am plifier simplified ...

Page 40: ...ain when the effective resistance of R76 is 0 and the X10 VERT GAIN switch is open Circuit gain decreases to 40 or less of the cali brated amount when R76 is fully inserted into the circuit Circuit Description Type 323 Refer once more to the Q41 emitter circuit If R46 is switched info the circuit it effectively decreases the re sistance between Q41A and Q41B More current then flows between the emi...

Page 41: ...cing of the deflection plate voltages independent of the inputs from the limiter circuit This enables the CRT vertical deflection plate voltages to be centered within their dynamic operat ing range VERTICAL OUTPUT AMPLIFIER 2 General A basic knowledge of operational amplifier theory is helpful in understanding the Vertical Output Amplifier and other circuits in the Type 323 Oscilloscope The follow...

Page 42: ...the base emitter junction of Q160 The resulting increased drive to Q160 causes its collector voltage to rise raising the upper deflection plate voltage The R160 feedback current changes in proportion to the deflection plate voltage change to null out the input error signal at the base of Q103 High Frequency Operation Large transient currents are necessary in the output circuit Q160 Q163 to charge ...

Page 43: ...t upon the internal vertical signal applied to Q215 Source follower action comparable to cathode follower ac tion provide the signal to a contact of the TIME DIV switch In all except EXT HORIZ position the output of the source follower is sent through or around C221 and C223 to the base of Q231 With the Trig Horiz Coupling switch in INT TRIG AC LF REJ signals below approximately 30 kHz are attenua...

Page 44: ... switching action by itself Consider the AUTO condition existing when Q263 is cut off A positive going ramp occurs at the base of Q263 If a negative signal simultaneously appears at the base of Q253 it will be coupled to the emitter lowering the Q263 emitter voltage The positive ramp at the base and the neg ative signal at the emitter combine their effects to increase the emitter base forward bias...

Page 45: ... and will remain there as long as its voltage and cur rent remain greater than indicated by point C If the cur rent or voltage falls below that value the diode will again switch through the negative resistance region and return to its low state The difference between low and high state operating voltages is commonly in the vicinity of 2 volt Circuits are designed to permit quiescent operation in e...

Page 46: ...346 and SWEEP LENGTH potentiometer R347 This causes the current through D303 to decrease because R303 cur rent is relatively constant D303 switches back to its low state as soon as its current drops below the amount required to hold it in its high state See Fig 3 7 C The setting of R347 determines the output voltage and therefore the sweep length required to cause D303 to switch to its low state D...

Page 47: ...pulse starts Holdoff time new sweep completed Fig 3 7 Sweep Generator waveform analysis Type 323 Oscilloscope sweep rate 1 ms DIV VOLTS DIV switch set at 5 DIV CAL W ave forms obtained with Type 547 Oscilloscope and C12 camera system deflection factor 0 5 m s div B 2 is the same as B l except that B intens by A was used to show the triggers which initiate the sweep A Time cm was set at 0 1 is d iv...

Page 48: ...r which supplies the signal to the right deflection plate The Output Inverter is also an operational amplifier and has a gain of one under all operating conditions As the electron beam is moved from left to right across the face of the cathode ray tube the Output Amplifier cir cuit current decreases as its voltage output decreases Simultaneously the Output Inverter current increases in step with i...

Page 49: ... graticule center vertical line When R439 is properly set the 1 division of horizontal presentation which straddles the center graticule vertical line during X I operation will be magnified and appear as a 10 division display when the X10 HORIZ MAG knob is pulled out Any 10 portion of the sweep sawtooth can be displayed as a 10 division sweep during X10 HORIZ MAG operation by adjusting the Hori zo...

Page 50: ...ncreased cathode current is thus made available Blocking Oscillator Operation Refer to Fig 3 8 When power is applied a positive volt age appears at the collectors of Q525 and Q529 at the emitter of Q518 and at the base of Q515 Q515 conducts and supplies Q518 with base emitter current turning Q518 on Q518 collector current flows through D523 and turns Q525 on The Q525 collector current passes throu...

Page 51: ...Circuit Description Type 323 3 16 Fig 3 8 Blocking Oscillator simplified ...

Page 52: ...ent 3 Drive voltage to Energy Storage Switch Q529 4 Em itter base drive current through Energy Storage Switch Q529 5 Charging current to T538 primary 6 T538 primary voltage 7 Current to load filters Q525 and Q529 off 3 17 Fig 3 9 Idealized waveforms referenced to the Blocking Oscillator simplified diagram Fig 3 8 ...

Page 53: ... difference be tween the 9 V reference supply and the charge on C550 It may be noted that current through R558 is also fixed being dependent upon the voltage at the base of Q558 Error sensor Q555 constantly compares a selected por tion of the 9 V reference supply against the 5 V output This comparison determines the collector current of Q555 Any changes of Q555 collector current must be accompanie...

Page 54: ...ference to the voltage generated by the battery charg ing current which flows through R615 The Comparator Am plifier output controls the Driver Amplifier which controls the conduction of the Series Regulator Q617 thereby de termining the battery charging current The battery charg ing circuit is independent of the POWER switch operating whenever AC power is applied Battery Charger Refer to the Powe...

Page 55: ...Voltage across R615 0 2 V 0 V H Q634 B and Q636 B 0 2 V 0 V I Q634 E and Q636 E D610 conducts Q621 stops conducting D637 and D638 conduct 0 8 V 0 6 V Fig 3 10 Battery charger waveform analysis during fu ll charge operation with Oscilloscope OFF Ground is used as reference except for C and F Waveforms are indicative of fully charged batteries Amplitudes change w ith battery charge rate and ON OFF s...

Page 56: ... POWER switch is turned on the base of Q634 is driven negative between charging current pulses This occurs because the battery reverses current flow through R615 while it supplies the Oscilloscope with power The net result is that the average charge on C636 tends to de crease providing more drive to Q634 This permits more current to flow through Q617 keeping the average charge on C636 at its previ...

Page 57: ...oscope in addition to im proving its appearance aids its operation and lengthens its operating life Dirt on components can result in short circuits A dry soft cloth and a soft bristled brush are recommended for removing loose dirt from the outside of the instrument Dirt on the inside should be loosened with a soft bristled brush and removed by using a vacuum clean er or a stream of low pressure ai...

Page 58: ...ists the response to all exterior controls should be ob served The first time operation listed in Section 2 can be used for this purpose All trouble symptoms should be evalu ated and compared against each other Equipment trouble will often create a combination of symptoms that will pin point the trouble A good example of this is power supply trouble which will usually cause symptoms to occur in ot...

Page 59: ...device is conducting voltage will be developed across resistances in series with it where as if it is open no voltage will be developed across re sistances in series with it unless current is being supplied by a parallel path An ohmmeter can be used to check a transistor if the ohmmeter s voltage source and current are kept within safe limits 1V2 volts and 2 mA are generally acceptable Se lecting ...

Page 60: ...the Type 323 Oscilloscope 3 color bands digit digit multiplier tolerance 4 color bands digit digit digit multiplier tolerance Numbers printed on wire wound and metal film re sistors The first two methods translate to the IEEE color code equivalent and are illustrated in Fig 4 2 Wiring Information Insulated wires in the Type 323 Oscilloscope are color coded to make wire tracing easier When it is ne...

Page 61: ...oscope can be purchased through Tektronix Field Offices or representatives However replacements for standard electronic items can readily be obtained from local electronic parts stores When selecting replacement parts it is important to re member that the physical size and shape of a component may affect its performance at high frequencies All re placement parts should be direct replacements unles...

Page 62: ...co u p lin g s w itc h a t DC Yes Swoop present in AUTO TRIGGER m ode w ith T IM E DIV a t 1 ms Trig Gen H oriz A m p Spot a t le ft o f g r a t i c u le w it h POSITIO N con tro ls centered Spot a t rig h t o f g r a t i c u le w it h POSITIO N con tro ls centered Yes Spot c e n t e r e d can be co ntro lle d w it h POSITIO N controls Yos T IM E D IV switch D isconnect CAL OUT from EXT TRIG OR HO...

Page 63: ...ul in remov ing solder from circuit boards expediting component remov al and replacement Other soldering aids should be made or purchased to suit specific needs General Soldering Techniques Keep the soldering iron well tinned and wiped clean To avoid excessive heating of the general area around the connection the iron should be completely heated before being applied When removing components apply ...

Page 64: ...o 40 watt iron with a y8 inch tip Keep the tip well tinned and clean Do not overheat components or circuit board Do not put excessive pressure on the board To remove a component grip a lead with the tip of a pair of needle nosed pliers Touch the tip of the soldering iron to the connection When the solder melts gently pull the lead from the board If a clean hole is not left in the board reheat it a...

Page 65: ...a l setup Display is obtainable1 in EXT HORIZ mode VOLTS DIV set at 5 DIV CAL TIME DIV at 5 mS POSITION controls in and centered POWER ON VARIABLE controls at CAL TRIGGER a t AUTO Trig Horiz Coupling switch at INT AC 4 9 Fig 4 6 Sweep Generator troubleshooting chart ...

Page 66: ...m plifier Troubleshooting Chart Initial setup VOLTS DIV at 5 DIV CAL POSITION controls in and centered TIME DIV a t 1 mS TRIGGER at AUTO Trig H oriz Coupling switch at INT AC POWER ON Remove Q160 and Q170 a horizontal line appears across center of CRT N o _ C R y Jnblank ckt Swp or N Horiz c k t s Yes Replace Q 160 and Q 170 connect bases of Q103 and Q109 together a horizon tal line appears ac ros...

Page 67: ...nstructions outline the most expeditious methods for removing components or for exposing their surfaces so that they may be inspected or worked on Undue force should not be used during disassembly or assembly Soldering should be done in accordance with the information given earlier in this section under Soldering Instructions Instruc tions for removing the Oscilloscope case and replacing the Power...

Page 68: ...fo r 115 V and 230 V AC operation Place insulated sleeves on unused square pins after changing the con nections Battery Pack Removal Unsolder the two leads which connect the battery pack to terminals I and M on the circuit board Free the one lead from the cable clamp Tape up one lead end creating minimum bulk so that the two leads cannot come in contact with each other Remove the nine screws and t...

Page 69: ... CRT and shield back by pushing gently on the face of the CRT Raise up on the CRT and shield until the slack is taken up on the front and rear cables and then remove the base socket from the CRT Do not put too much strain on the cables while removing the base socket Avoid bending the CRT base pins The CRT is free to slide out of the front of the shield once the base socket is removed so be careful...

Page 70: ...g the three screws from the upper surface and then lifting the board up and out pivot ing it on the wiring harness at the side of the board Power Supply Circuit Board For access to the bottom of this board perform the following Remove the Power Regulator circuit board Then unscrew the three nylon mounting posts Turn the Oscilloscope up side down to permit two lock washers to fall free and set them...

Page 71: ...Maintenance Type 323 4 15 Fig 4 13 Transistor data ...

Page 72: ...Maintenance Type 323 4 16 Fig 4 14 M ain circuit board p a rtia l loft side vertical circuit components ...

Page 73: ... 0 5 0 5 0 2 3 9 Q326 S f R32 R308fi D309 R305I D305 R 4 1 0 R43l R C433 C432fc l 04201 R342I C353 10353 R 42 2 y o 2 C362 Q 3 S 6 1 JC 364 I r 04271 O370 C454 C446 R367I 0 3 7 3 C s 0 4 5 9 0 3 6 3 i V rC457 R457 R 363f i r iR 372 Jr R366Mrp r i R 3 6 5 JR3 R455 C493 4 17 Fig 4 15 Main circuit board p a rtia l right s id e trig g e r and horizontal circuit components FRONT ...

Page 74: ...ig H o rii Coupling sw A to center cont veit B to center cont vert POSITION G Coax from VOLTS DIV sw F1 5 V to vert POSITION E 5 V to vert POSITION AS to POWER sw to pin 7 CRT AR to pin 11 CRT T to X 1 0 VERT GAIN sw K to X 1 0 VERT GAIN sw 4 18 Fig 4 16 M ain circuit board p a rtia l le ft side wire connections ...

Page 75: ... cont horlz POSITION BA to X 1 0 HORIZ MAG BB Shld for BA A W to ew cont horlz AV to ccw cont L to pin 6 CRT M to pin 3 CRT N to trace rotation coll CRT to ccw cont VARIABLE TIME DIV P to trace rotation coil CRT TRIGGER IF 2 U to Trig H oriz Coupling sw and C209 T to TIME DIV sw 4R 17 R 5 V from C Pwr Reg bd O to 5 V to front panel to Trig H oriz Coupling sw W to TRIGGER 2F 1 X to TRIGGER 2F 7 V 5...

Page 76: ... term 5 T601 A to term 6 T601 E to term 4 T601 F601 pin conn for operation G to emitter Q617 H to term 8 T601 T to term bat J to Power Pack sw to term 2 T601 wire w conn for selecting 115 V 230 V operation F to term 3 T601 wire w conn for select ing 1 1 5 V 2 3 0 V operation Pin conn for 230 V operation GR to gnd at J16 AC POWER conn WH to GND on Pwr Sup bd coll Q61 7 BL to POWER sw Power Pack sw ...

Page 77: ...FOCUS M to pin 13 CRT conlor cont FOCUS F 5 V from U Pwr Rog bd G to T Pwr Reg bd O to cw cont INTENSITY K to pin 12 CRT FRONT Fig 4 20 Power Supply circuit board F to T Pwr Sup bd G 14 V to H Pwr Sup bd BJ M ain bd E to J Pwr Sup bd D S V to Y1 M ain bd C 5 V to R M ain bd B to GND on Pwr Sup bd to ON position POWER sw R_519 5 1 8 fc Q518 L 9 9 R 5 0 g f 7 05 1 6 C O S IS 1J D547 J S R 5 1 2 f c ...

Page 78: ... may be obtained from separate generators 120 volts amplitude at one kilohertz repetition rate with a one microsecond risetime 500 millivolts into 50 ohms at M ay tie deleted and instrument connected directly to applicable power source If step 1 is not performed one kilohertz and one megahertz repetition rates with a 50 nanosecond risetime Tektronix Type 106 Square Wave Generator recommended meets...

Page 79: ...supply does not have an accu rate meter to indicate output voltage use an accurate DC voltmeter to monitor the output for this step c Return variable DC power supply output voltage to 8 volts 2 Check Variable Volts Division Balance REQUIREMENT Less than one division vertical trace shift as the VARIABLE VOLTS DIV control is rotated through out its range a Position the trace to the center horizontal...

Page 80: ... 1 division from straight line Fig 5 2 shows a typical display of good geom etry d Disconnect the time mark generator e Position the trace to the top line of the graticule with the vertical POSITION control f CHECK Deviation from straight line should not exceed 0 1 division g Position the trace to the bottom of the graticule with the vertical POSITION control h CHECK Deviation from straight line s...

Page 81: ...litude calibrator for a 50 milli volt square wave output b Change the following control settings VOLTS DIV 01 INPUT AC c Center the display about the center horizontal line with the vertical POSITION control d CHECK Rotate the VARIABLE VOLTS DIV control fully counterclockwise Display must be reduced to two divisions or less indicates adequate range for continuously variable deflection factor betwe...

Page 82: ...obe instruc tion manual f CHECK CRT display at each VOLTS DIV switch setting for optimum square corner and flat top within 3 or 3 or total peak to peak aberrations not to exceed 3 Readjust the generator output and remove the attenuator as necessary lo muinluin a five division display pull the X10 VERT GAIN switch for 5 10 and 20 positions g Disconnect all test equipment 16 Check High Frequency Com...

Page 83: ... following control settings INPUT AC X10 VERT GAIN Pushed in TIME DIV 5 s c Set the low frequency generator for a four division display centered about the center horizontal line at a refer ence frequency of one kilohertz d Without changing the output amplitude reduce the output frequency of the generator to two hertz e CHECK CRT display 2 8 divisions or greater in amplitude not more than 3 dB f Di...

Page 84: ...5 and 11 divisions as shown by 0 5 to one division of display to the right of the tenth vertical line 22 Check Variable Tim e Division Control Range REQUIREMENT Continuously variable sweep rate be tween the calibrated TIME DIV switch settings a Set the time mark generator for 10 millisecond mark ers b Set the TRIGGER control for a stable display in the variable positive slope area c Position the m...

Page 85: ... EXT TRIG OR HORIZ ATTEN switch side panel to 10X b Set the standard amplitude calibrator for a 20 volt square wave output c CHECK CRT display for horizontal deflection of 6 7 to 10 divisions between dots two to three volts division 28 Check External Horizontal Variable Control Range REQUIREMENT 10 1 range or greater a Turn the EXT HORIZ VAR control fully counterclockwise b CHECK CRT display not m...

Page 86: ... BNC cable 50 ohm BNC termination and the BNC T connector Connect the output of the BNC T connector to the EXT TRIG OR HORIZ INPUT connector with a 42 inch 50 ohm BNC cable c Set the constant amplitude generator for a 0 3 divi sion display at 400 kilohertz d CHECK Stable CRT display is presented with the Trig Horiz Coupling switch set to INT TRIG AC and ACLF REJ e Turn the TRIGGER control clockwis...

Page 87: ...e CRT display is presented t Disconnect the high frequency generator 34 Chedk Low Frequency Triggering Operation REQUIREMENT External stable display in EXT TRIG OR HORIZ AC and DC positions of the Trig Horiz Coupling switch with the TRIGGER control set to AUTO variable positive slope area variable negative slope area and AUTO check with 75 millivolt signal at 30 hertz Internal stable display in IN...

Page 88: ... the positive slope of the waveform indicates TRIGGER control range of at least and 0 8 volt Display is not triggered at either extreme of the positive slope area except in AUTO de tent e CHECK Rotate the TRIGGER control throughout the negative slope area and check that the display can be trig gered at any point along the negative slope of the wave form Display is not triggered at either extreme o...

Page 89: ...control for a table display f Position the top of the waveform onto the display area with the vertical POSITION control g CHECK Difference between the standard amplitude calibrator output level and the Type 323 calibrator output level is 0 05 division about one trace width or less 0 5 volt 1 see Fig 5 7 Fig 5 7 Typical CRT display when checking voltage output of cali brator NOTE b Connect the CAL ...

Page 90: ...ision voltage divider is available for use w ith the precision DC voltmeter such as Fluke 80E 2 Voltage D ivider it is recom mended for more accurate adjustment of the high voltage supply 3 Variable DC power supply Voltage range at least 6 to 16 volts current capability at least 0 75 ampere output voltage measured within 3 except where noted For example Trygon Model HR40 750 4 Test oscilloscope Ba...

Page 91: ...__ Calibrated by ___ ___________________________ 1 Adjust Charging Current R644 Page 6 6 54 millivolts millivolts across R615 at FULL CHG Check for about 20 millivolts across R615 at TRICKLE CHG 1 2 Adjust High Voltage Supply and Check Page 6 7 Regulation R513 1900 volts 3 8 volts Must maintain this toler ance over DC power input range r 3 Adjust Intensity Limit R583 Page 6 7 1 00 volt 0 05 volt a...

Page 92: ...206 Optimum square wave response for external trig ger siqnals with EXT TRIG OR HORIZ ATTEN set to 10X 27 Adjust High Frequency Compensation Page 6 17 Cl 60 Cl 70 Optimum square wave response at 100 kilohertz with peak aberrations not to exceed 2 or 2 or total aberrations not to exceed 3 peak to peak 28 Check Upper Vertical Bandwidth Limit Page 6 18 Not more than 3 dB at four megahertz Q 29 Check ...

Page 93: ...not be obtained at 30 hertz 50 Check Trigger Slope Operation Page 6 27 Stable triggering on correct slope of trigger sig nal in the AUTO variable positive slope area variable negative slope area and AUTO posi tions of the TRIGGER control FI 51 Check TRIGGER Control Range Page 6 27 EXT TRIG OR HORIZ ATTEN switch set to IX at least and 0 8 volts EXT TRIG OR HORIZ ATTEN switch set to 10X at least f a...

Page 94: ...it Preliminary Procedure for Complete Calibration 1 Remove the cabinet from the Type 323 2 Remove the high voltage cover and power pack from the Type 323 Removal instructions are given in the Main tenance section of this manual 3 Using the AC power cord connect the power pack of the Type 323 to an AC line voltage source which is within the voltage and frequency requirements of this instrument NOTE...

Page 95: ...t equipment setup for steps 1 through 12 Power Controls POWER Power Pack rear panel ON FULL CHG 1 Adjust Charging Current a Test equipment setup is shown in Fig 6 1 o b Connect the precision DC voltmeter across R615 see Fig 6 2 The positive lead of the voltmeter should be con nected to the bottom of R615 Be sure the negative lead of the voltmeter is isolated from ground c CHECK Meter reading 54 mi...

Page 96: ...Return the variable DC power supply to 8 volts k INTERACTION May affect operation of all circuits within the Type 323 If the precision 2 kV voltage divider is available for use with the precision DC voltmeter it should be used for this step Point K Power Regulator board intensity lim it test point A Point L Power Supply board high voltage test point Intensity Limit Fig 6 3 Location of high voltage...

Page 97: ...volt test point point BJ Main board see Fig 6 4A to chassis ground b CHECK Meter reading 14 volts 2 8 volts c Connect the precision DC voltmeter from the 100 volt test point point AN Main board see Fig 6 4A to chassis ground d CHECK Meter reading 100 volts 5 volts e Connect the precision DC voltmeter from the 175 volt test point point AO Main board see Fig 6 4A to chassis ground f CHECK Meter read...

Page 98: ...tical X lO Balance O a Return the VARIABLE VOLTS DIV control to CAL b Position the trace to the center horizontal line with the vertical POSITION control c Pull the X lO VERT GAIN switch out Note to pre vent changing knob position the X lO VERT GAIN switch can be actuated using the vertical POSITION control bracket behind the front panel d CHECK Trace shift less than 1 5 division vertically e ADJU...

Page 99: ...SITION control k Connect the precision DC voltmeter from the collector of Q163 case of Q163 see Fig 6 5 to chassis ground l Preadjust the Limit Centering adjustment R66 see Fig 6 5 for a meter reading of 50 volts perform this adjust ment only if proceeding to next step m Disconnect all test equipment Fig 6 6 Initial test equipment setup fo r steps 13 through 22 Vertical Controls Horizontal Control...

Page 100: ...Position the baseline of the marker display below the bottom of the graticule with the vertical POSITION control c CHECK CRT display for curvature of vertical lines markers within maximum deviation of 0 1 division from straight line Curvature can be most easily checked by posi tioning the markers to the vertical graticule lines with the horizontal POSITION control Fig 6 7C shows a typical display ...

Page 101: ...ERT GAIN switch c Center the display about the center horizontal line with the vertical POSITION control d CHECK CRT display for five divisions of deflection e ADJUST VERT X lO GAIN adjustment R46 see Fig 6 7B for exactly five divisions of deflection 19 Check Vertical Deflection Accuracy a Push the X lO VERT GAIN switch in b CHECK Using the VOLTS DIV switch and standard amplitude calibrator settin...

Page 102: ...enter horizontal line h Disconnect all test equipment 22 Check Trace Shift Due to Input Current a Change the following control settings INPUT GND X10 VERT GAIN Pulled out b Install the calibration shield 067 0571 00 on the Type 323 c Position the trace to the center horizontal line with the vertical POSITION control d CHECK Set the INPUT switch to DC Trace shift should be negligible 0 085 division...

Page 103: ... wave generator Type 106 high amplitude output connector to the VERT INPUT connector through the GR to BNC adapter 10X BNC attenuator 42 inch 50 ohm BNC cable 50 ohm BNC termination and 47 pF input RC normalizer in given order d Set the square wave generator for a five division dis play at one kilohertz e CHECK CRT display for 0 2 division or less over shoot or rounding 47 pF 4 pF see Fig 6 9 f Di...

Page 104: ...ttenuator and pull the X10 VERT GAIN switch as given in Table 6 3 to provide five divisions of deflection Fig 6 1O B shows the location of the variable capacitors h Disconnect all test equipment and remove the calibra tion shield 25 Adjust Internal Trigger Compensation O a Change the following control settings M 7E V 0 Incorrect top ot fl at MM L Fig 6 10 A Typical CRT display showing correct and ...

Page 105: ...oint T Main board see Fig 6 11C Be sure the probe is compensated f Set the square wave generator for a one kHz five divi sion vertical display on the test oscilloscope Disregard overshoot or rounding and adjust for five divisions as meas ured between trailing edges of square waves See Fig 6 11 A g CHECK Test oscilloscope display for about one divi sion front corner rounding at normal CRT intensity...

Page 106: ...al deflection fac tor of one volt division 10 volts division at 10X probe tip at a sweep rate of two microseconds division Adjust the triggering controls when necessary to provide a stable dis play f Connect the 10X probe tip to the collector of Q163 case of Q163 see Fig 6 12B Be sure the probe is com pensated g CHECK Test oscilloscope display for flat top on square wave similar to Fig 6 12A h ADJ...

Page 107: ...est equipment setup is shown in Fig 6 13 b Connect the high frequency constant amplitude sine wave generator Type 191 to the VERT INPUT connector through the GR to BNC adapter 42 inch 50 ohm BNC cable 10X BNC attenuator and the 50 ohm BNC termination c Set the constant amplitude generator for a four division display centered about the center horizontal line at its reference frequency 50 kilohertz ...

Page 108: ...ol settings VOLTS DIV 5 INPUT DC TIME DIV 1 ms b Connect the time mark generator to the VERT INPUT connector through a 42 inch 50 ohm BNC cable and a 50 ohm BNC termination c Set the time mark generator for five millisecond mark ers d Set the TRIGGER control for a stable display in the variable positive slope area e Position the middle marker three markers on sweep to the center vertical line see ...

Page 109: ...clockwise e CHECK CRT display for four division maximum spac ing between markers indicates adequate range for con tinuously variable sweep rates between the calibrated steps 34 Adjust Sweep Length O a Return the VARIABLE TIME DIV control to CAL b Set the time mark generator for one millisecond mark ers c Adjust the TRIGGER control for a stable display in the variable positive slope area d Move the...

Page 110: ...n shield on the Type 323 b Set the TIME DIV switch to 10ps X10 HORIZ MAG switch remains pulled out c Set the horizontal POSITION control to midrange d Set the time mark generator for one microsecond mark ers e Set the TRIGGER control for a stable display f CHECK CRT display for optimum linearity and timing between the sixth and tenth vertical lines see Fig 6 17A Sixth vertical line Tenth vertical ...

Page 111: ...nd 2 5 ms 5 millisecond 1 10 ms 10 millisecond 1 20 ms 10 millisecond 2 50 ms 50 millisecond 1 1 s 0 1 second 1 2 s 0 1 second 2 5 s 0 5 second 1 0 32 division 1 s 1 second 1 within 4 b CHECK Using the TIME DIV switch and time mark generator settings given in Table 6 4 check normal sweep timing within the given tolerances over the middle eight divi sions of the display Set the TRIGGER control as n...

Page 112: ... Power Controls POWER Power Pack rear panel AUTO EXT TRIG OR HORIZ DC I X EXT HORIZ CAL Midrange Pulled out Adjust for focused display Adjust for visible display ON EXT DC c CHECK Rotate the EXT HORIZ VAR control VARI ABLE TIME DIV throughout its range Dot should not move horizontally d ADJUST Ext Horiz Var Bal adjustment R218 see Fig 6 19 for no trace shift as the EXT HORIZ VAR control is rotated...

Page 113: ...h a Change the following control settings EXT TRIG OR 1X HORIZ ATTEN EXT HORIZ VAR CAL fully clockwise b Connect the low frequency sine wave generator to the EXT TRIG OR HORIZ INPUT connector through the 42 inch 50 ohm BNC cable and 50 ohm BNC termination c Set the low frequency generator for six division hori zontal deflection centered about the center vertical line at one kilohertz d Without cha...

Page 114: ...nstant amplitude sine wave generator to the VERT INPUT connector through the GR to BNC adapter 42 inch 50 ohm BNC cable 50 ohm BNC termination and the BNC T connector Connect the output of the BNC T connector to the EXT TRIG OR HORIZ INPUT connector with a 42 inch 50 ohm BNC cable c Set the constant amplitude generator for a 0 3 division display at 400 kilohertz d CHECK Stable CRT display is prese...

Page 115: ...display is presented j Set the constant amplitude generator for a 1 9 division display 190 millivolts at 400 kilohertz k Without changing Ihe oUlpUl amplitude set the yell erator to four megahertz l Pull the X10 HORIZ MAG switch out m CHECK Stable CRT display is presented n Turn the TRIGGER control counterclockwise to the vari able negative slope area o CHECK Stable CRT display can be obtained wit...

Page 116: ...ig 6 22A d Turn the TRIGGER control clockwise until a stable dis play is obtained in the positive slope area e CHECK CRT display starts on the pos tive slope of the waveform f Turn the TRIGGER control clockwise until a stable dis play is obtained in the negative slope area g CHECK CRT display starts on the negative slope of the waveform see Fig 6 22B Fig 6 22 A Typical CRT display when checking po...

Page 117: ... b Position the start of the trace to the left first ver tical line of the graticule c CHECK CRT display for duration of one cycle be tween 5 and 10 divisions repetition rate 750 hertz 250 hertz 54 Check Calibrator Duty Cycle a Set the TIME DIV switch to 1 ms b Set the VARIABLE TIME DIV control for one complete cycle in 10 divisions c CHECK CRT display for length of positive segment of the square ...

Page 118: ...yrene EMC electrolytic metal cased prec precision EMT electrolytic metal tubular PT paper tubular ext external PTM paper or plastic tubular molded F 1 focus and intensify RHB round head brass FHB flat head brass RHS round head steel FHS flat head steel SE single end Fil HB fillister head brass SN or S N serial number Fil HS fillister head steel SW switch h height or high TC temperature compensated...

Page 119: ...Part number instrument type or number serial or model number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number X000 00 X 000 0000 00 Use 000 0000 00 O SPECIAL NOTES AND SYMBOLS Part first added at this serial number Part removed ...

Page 120: ...18 pF Var Cer 2 8 pF Var Cer 470 pF Mica 5 5 18 pF Var Cer 2 8 pF Var Cer 300 V 10 C25C 283 0617 00 300000 300305 4700 pF Mica 300 V 10 C25C 283 0617 01 300306 4700 pF Mica 300 V 10 C28A 281 0091 01 2 8 pF Var Cer C28B 281 0093 01 5 5 18 pF Var Cer C28C 281 0592 00 4 7 pF Cer 500 V 0 5 pF C29A 281 0093 01 5 5 18 pF Var Cer C29B 281 0091 01 2 8 pF Var Cer C31 283 0068 00 0 01 fiF Cer 500 V C33 290 ...

Page 121: ... 00 300295 100 pF Cer 350 V C256 281 0578 00 18 pF Cer 500 V 5 C270A 290 0134 01 22 ixF Elect 15 V C270B 290 0136 01 2 2 ju F Elect 20 V C270C 290 0264 01 0 22 ixF Elect 35 V 10 C290 290 0183 01 1 XF Elect 35 V 10 C293 290 0183 01 1 fxF Elect 35 V 10 C301 281 0504 00 300000 300030 10 pF Cer 500 V 10 C301 281 0578 00 300031 18 pF Cer 500 V 5 C310 290 0183 01 1 Elect 35 V 10 C313 283 0003 01 0 01 fx...

Page 122: ...2 152 0246 00 D33 152 0246 00 D54 152 0185 00 D81 152 0185 00 D82 152 0185 00 Description 2 8 pF V a r Cer 1 pF Cer 600 V 22 pF Elect 1 5 V 1 p F Elect 35 V 10 1 p F Elect 150 V 1 pF Elect 35 V 10 1 pF Cer 25 V 8 0 2 0 150 pF Elect 1 5 V 0 01 pF Cer 150 V 0 1 pF Cer 500 V 0 03 pF Cer 200 V 8 0 2 0 0 03 pF Cer 200 V 8 0 2 0 3 pF Elect 150 V 22 pF Elect 15 V 22 pF Elect 15 V 47 pF Elect 6 V 47 pF El...

Page 123: ... 00 Silicon Replaceable by 1N4152 D416 152 0185 00 Silicon Replaceable by 1N4152 D442 152 0127 00 Zener 1N755A 400 mW 7 5 V 5 D452 152 0185 00 Silicon Replaceable by 1N4152 D501 152 0107 00 Silicon Replaceable by 1N647 D516 152 0185 00 Silicon Replaceable by 1N4152 D521 152 0185 00 Silicon Replaceable by 1N4152 D523 152 0185 00 Silicon Replaceable by 1N4152 D525 152 0061 00 Silicon Tek Spec D528 1...

Page 124: ...10 00 Silicon Dual FET Q41 A B 151 0232 00 Silicon Dual Q50 151 0221 00 Silicon 2N4258 Q53 151 0190 00 Silicon 2N3904 Q55 151 0190 00 Silicon 2N3904 Q58 151 0221 00 Silicon 2N4258 Q61 151 0190 00 Silicon 2N3904 Q71 151 0190 00 Silicon 2N3904 Q91 151 0221 00 Silicon 2N4258 Q99 151 0221 00 Silicon 2N4258 Q103 151 0190 00 Silicon 2N3904 Q109 151 0190 00 Silicon 2N3904 Q lll 151 0190 00 Silicon 2N3904...

Page 125: ... 151 0220 00 Silicon 2N4122 Q427 151 0233 00 Silicon 2SC805 High Voltage Selector Q440 151 0228 00 Silicon Tek Spec Q450 151 0228 00 Silicon Tek Spec Q459 151 0233 00 Silicon 2SC805 High Voltage Selector Q505 151 0179 00 Silicon 2N3877A Q515 151 0190 00 Silicon 2N3904 Q518 151 0219 00 Silicon Replaceable by 2N4250 Q525 151 0231 00 Silicon 2SC756 4 Q529 151 0231 00 Silicon 2SC756 4 Q555 151 0190 00...

Page 126: ... W 5 R34 321 0068 30 49 9 n 8 W Prec i R36 321 0249 30 3 83 kn 8w Prec i R38 321 0249 30 3 83 kn 8 w Prec i R39 311 0622 00 100 n Var R40 311 0634 00 500 n Var R42 321 0223 30 2 05 kn y8 w Prec i R44 321 0210 30 1 5 kn 8w Prec i R46 311 0643 00 50 n Var R47 321 0111 30 140 n 8w Prec i R49 321 0223 30 2 05 kn 8 W Prec i R 51 321 0285 30 9 09 kn W Prec i R52 321 0208 30 1 43 kn w Prec i R54 315 0432...

Page 127: ...3 30 315 0101 01 321 0289 30 321 0270 30 321 0318 30 321 0239 30 321 0239 30 321 0289 30 321 0281 30 315 0102 01 321 0452 00 315 0510 01 315 0620 01 315 0202 01 321 0114 30 315 0203 01 315 0333 01 3kn Var 4 02 kO V w 24 kn V w 2 X 10 kO Var 24 kn V w 4 02 kn y w 12 kn w 17 8 kn w 17 8 kn W 24 kn V w lOkn Var 10kn Var 24 kn V w 4 42 kn y w 3 9 kn y w 3 9 kn y w 4 42 kn y w 5 49 kn y w 3 24 kn y w 3...

Page 128: ... R238 321 0240 30 3 09 kO AW Prec 1 R239 315 0101 01 100 O AW 5 R242 315 0472 01 4 7 kO AW 5 R244 315 0203 01 300000 300915 20 kn AW 5 R244 315 0183 02 300916 18 kn AW 5 R246 311 0687 00 50 kn Var R 251 321 0289 30 io kn A W Prec 1 R252 321 0297 30 12 1 kn AW Prec 1 R253 321 0339 30 33 2 kn AW Prec 1 R254 321 0176 30 665 0 A W Prec 1 R256 321 0289 30 io kn AW Prec 1 R257 321 0245 30 3 48 kn AW Pre...

Page 129: ...0688 00 300000 300251 20 kQ y 200 kQ var R334A R334B J 311 0688 01 300252 20 kQ y 200 kQ V R340A 315 0512 01 5 1 kQ AW 5 R342 315 0913 01 91 kQ A W 5 R344 315 0333 01 33 kQ A W 5 R346 321 0247 30 3 65 kQ Vb W Prec 1 R347 311 0633 00 5 kQ Var R351 315 0104 02 100 kQ A W 5 R353 315 0204 01 200 kQ A W 5 R355 315 0472 01 4 7 kQ A W 5 R357 315 0151 01 150 Q A W 5 R359 315 0102 01 1 kQ A W 5 R363 315 04...

Page 130: ...915 01 9 1 Mn A W 5 R 450 315 0433 01 43 kn A W 5 R451 315 0472 01 4 7 kn A W 5 R452 315 0222 02 2 2 kn A W 5 R454 322 0481 00 i Mn A W Prec 1 R455 321 0338 30 32 4 kn w Prec 1 R457 322 0481 00 i Mn A W Prec 1 R491 315 0100 01 io n AW 5 R493 315 0201 01 200 n A W 5 R503 321 0308 30 15 8 kn w Prec 1 R504 321 0388 30 I07kn w Prec 1 R506 315 0105 01 1 Mn A W 5 R510 315 0153 02 15 kn A W 5 R512 315 01...

Page 131: ...0472 01 4 7 kn A W 5 R570 315 0221 01 220 n A W 5 R572 315 0332 02 3 3 kn A W 5 R580 301 0106 00 io Mn y w 5 R 581 311 0690 00 5 Mn Var R582 301 0106 00 io Mn y w 5 R583 311 0698 00 1 Mn Var R584 315 0474 01 300000 300372 470 kn Selected nominal value R584 315 0105 01 300373 1Mn Selected nominal value R585 311 0690 00 5Mn Var R587 301 0226 00 22 Mn A W 5 R590 315 0470 02 47 n A W 5 R 591 315 0470 ...

Page 132: ... Wired 262 0821 00 Rotary TRIGGER SW246 260 0886 00 Rotary TRIGGER SW335 Wired 262 0822 00 Rotary TIME DIV SW335 260 0887 00 Rotary TIME DIV SW435 260 0904 00 Slide X I0 HORIZ MAG SW501 260 0903 00 Slide POWER ON OFF Transformers T525 120 0505 00 300000 300507 Toroid T525 120 0505 01 300508 Toroid T538 120 0504 00 H V Power Electron Tube V590 154 0519 00 CRT T3230 7 13 ...

Page 133: ...n Replaceable by 1N647 Germanium Germanium Zener 1N753A 400 mW 6 2 V 5 Fuses F601 Use159 0080 00 F601 Use159 0074 00 1 5A Slo Blo 115 Voperation 1 10A Slo Blo 230 Voperation Connectors P601 131 0552 00 Motor Base J611 136 0139 00 Socket Banana Jack Assy J612 136 0140 00 Socket Banana Jack Assy Inductor L611A B 108 0488 00 150 H Transistors Q617 151 0229 00 Silicon 2SD28 Q620 151 0219 00 Silicon Re...

Page 134: ...45 00 422 kQ w Prec 1 R635 315 0752 01 7 5 kQ A W 5 R637 315 0102 01 1 kQ A W 5 R638 315 0102 01 l kn A W 5 R639 315 0152 01 1 5 kO A W 5 R641 315 0272 02 2 7 kO A W 5 R643 321 0341 30 34 8 kQ V W Prec 1 R 644 311 0635 00 1 kQ Var Switches Unwired or Wired SW612 260 0902 00 Slide EXT DC TRICKLE CHG FULLCHG Transformers T601 120 0503 00 L V Power 7 15 ...

Page 135: ...must be purchased separately unless otherwise specified PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements developed in our engineering departmen...

Page 136: ...Mechanical Parts List Type 323 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS Located behind diagrams FIG 1 MECHANICAL PARTS FIG 2 CABINET FIG 3 STANDARD ACCESSORIES ...

Page 137: ...rnal 7 1 RESISTOR variable resistor includes 8 1 WASHER flat 9 1 NUT metric mounting hardware not included w resistor 10 210 0046 00 1 LOCKWASHER internal 0 261 ID x 0 400 inch 11 214 1001 00 1 SPRING detent 376 0069 00 1 COUPLING shaft extension 8 to 0 80 inch coupling includes 12 354 0319 00 1 RING coupling w detent notch 13 376 0046 00 1 COUPLING plastic 14 354 0251 00 1 RING coupling 213 0048 ...

Page 138: ...lit NUT hex 4 40 x 3 4 inch RESISTOR variable resistor includes WASHER flat NUT metric mounting hardware not included w resistor LOCKWASHER internal 0 261 ID x 0 400 inch OD SPRING detent COUPLING shaft extension 8 to 8 inch coupling includes RING coupling w detent notch COUPLING plastic RING coupling SCREW set 4 40 x V8 inch HSS SHAFT extension mounting hardware not included w switch WASHER flat ...

Page 139: ...D x 9 u inch OD NUT hex 3 g 32 x 7 m inch x V s inch thick KNOB lever gray INT TRIG EXT TRIG SWITCH lever INT TRIG EXT TRIG SWITCH lever INT TRIG EXT TRIG mounting hardware not included w switch LOCKWASHER internal 4 NUT hex 4 40 x z inch KNOB lever gray INPUT SWITCH lever INPUT mounting hardware not included w switch LOCKWASHER internal 4 NUT hex 4 40 x 3 w inch SWITCH slide POWER mounting hardwa...

Page 140: ...0004 00 1 GROMMET rubber inch diameter 84 348 0031 00 1 GROMMET plastic V32 inch diameter 85 343 0042 00 1 CLAMP cable half 5 1 4 inch diameter mounting hardware not included w clamp 210 0801 00 1 WASHER flat 0 140 IDx0 281 inch OD 86 210 0586 00 1 NUT keps 4 40 x 4 inch 87 670 0576 00 1 ASSEMBLY circuit board MAIN assembly includes 388 0910 00 1 BOARD circuit 88 136 0220 00 27 SOCKET transistor 3...

Page 141: ...for each not included w holder SPACER plastic 0 281 inch long SPRING mounting hardware not included w assembly SCREW 4 40 x inch PHS SHIELD electrical angle co netic foil ASSEMBLY power pack assembly includes ASSEMBLY circuit board BATTERY CHARGER assembly includes BOARD circuit SOCKET transistor 3 pin CONNECTOR square pin CONNECTOR square pin angled mounting hardware not included w assembly WASHE...

Page 142: ...g hardware not included w connector SCREW 4 40 x 1 inch 100 csk FHS COVER fuse TRANSFORMER mounting hardware not included w transformer SCREW 4 40 x 1 4 inches RHS SCREW 4 4 0 xiy3j inches RHS WASHER fiber Vs ID x inch OD LUG solder SE 4 NUT hex 4 40 x 3 4 inch SWITCH slide EXT DC TRICKLE CHG FULL CHG mounting hardware not included w switch SCREW 4 40 x 4 inch 100 csk FHS TRANSISTOR mounting hardw...

Page 143: ... inch 100 csk FHS 169 210 0801 00 1 WASHER flat 0 125 ID x 0 250 inch OD 170 210 0004 00 1 LOCKWASHER internal 4 171 210 0406 00 1 NUT hex 4 40 x 3 u inch 172 210 0586 00 3 NUT keps 4 40 x y4 inch 173 348 0067 00 1 GROMMET plastic 5 u inch diameter 174 348 0055 00 2 GROMMET plastic y4 inch diameter 175 337 0984 00 1 SHIELD electrical attenuator mounting hardware not included w shield 176 211 0008 ...

Page 144: ...___________________________ CONNECTOR coaxial 1 contact BNC with hardware mounting hardware not included w connector LUG solder inch SOCKET banana jack charcoal mounting hardware for each not included w socket WASHER insulating LUG solder ID x 7 n inch OD SE NUT hex y4 32 x inch CONNECTOR coaxial insulated 1 contact BNC with hardware ASSEMBLY binding post assembly includes POST binding CAP binding...

Page 145: ...0 300000 300150 2 POST metallic 6 32 tap 129 0148 02 300151 2 POST metallic 6 32 tap 8 386 1339 00 2 PLATE brake friction inner 9 386 1331 00 2 PLATE brake friction outer 10 210 1053 00 4 WASHER spring tension 11 200 0819 00 2 COVER handle brake 12 132 0084 00 2 SPACER plastic 0 450 dia x 0 050 inch long 13 213 0179 00 300000 300150 2 SCREW cap 6 32 threads 213 0179 02 300151 2 SCREW cap 6 32 thre...

Page 146: ...r adjustment Externally accessible control or con nector Clockwise control rotation in direc tion of arrow Refer to indicated diagram Connection to circuit board made with pin connector Blue line encloses components lo cated on circuit board Connection soldered to circuit board ...

Page 147: ...T Y P E 3 2 3 O S C I L L O S C O P E B L O C K D IA G R A M MRI4 i ...

Page 148: ...23 Oscilloscopes Variations may also be introduced because of the type of test equipment involved in reproducing the volt ages or waveforms VOLTAGE comparisons should be made under the follow ing con ditions Diagram Number 1 2 4 6 7 3 8 Type 323 Oscilloscope Setup Power Source VOLTS DIV VARIABLE TIME DIV VAR INTENSITY POWER POSITION controls TRIGGER T rig H oriz Coupling Same as above TRIGGER Any ...

Page 149: ...E R a O R S JUNC TIOW TO THE R 8 3 R 8 4 JU N C TIO N SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE A T T E K JU A T O K V O LT A G E A klD W A V E F O R M INSTRUCTION S APPEAR AT THE LEFT OF THIS DIAGRAM T Y P E 3 2 3 O S C I L L O S C O P E y g R T I C A L P R E A M P f ...

Page 150: ...ME DIV 1 ms VARIABLE CAL POWER ON INTENSITY Minimum intensity consistent with good viewing POSITION Controls Knobs in and display centered TRIGGER AUTO T rig H oriz Coupling INT TRI G AC POWER ON Test Oscilloscope Externally triggered by positive slope from Type 323 Oscilloscope CAL OUT Sweep Rate 0 5 ms division 3 4 6 Same as for diagrams 1 and 2 except Type 323 Oscilloscope TIME DIV at 50 j i s ...

Page 151: ...STRUCTIONS APPEAR AT THE LEFT OF DIAGRAM SEE PARTS LIST FOR SEMICONDUCTOR TYPES REFERENCE DIAGRAMS VERTICAL PREAMP TRIGGER GENERATOR j SWEEP GENERATOR MRK4 T Y P E 3 2 3 O S C I L L O S C O P E A V E R T I C A L O U T P U T A M P L I F I E R I 68 ...

Page 152: ...ies w ill be noted VOLTS DIV 20 TIME DIV EXT HORIZ INTENSITY Fully CCW POSITION Knobs in and set Controls to midrange TRIGGER M idrange POWER ON Test Oscilloscope Externally triggered by positive slope from term inal I of the Power Supply circuit board Sweep Rate 10 xs division Type 323 Oscilloscope Power Pack disconnected and re moved from the Oscilloscope See Operating Instructions section for r...

Page 153: ...UCTOR TYPES TIMING SWITCH HORIZONTAL AMPLIFIER VOLTAGE AND WAVEFORM IN S T R U C T IO N S A P PEAR AT TH E L E F T OF DIAGRAM EXCEPT AS FOLLOW S 3 2 3 TRIGGER AT AUTO VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE t y p e 3 2 3 osciL i OscopE c T R IGG E R G E N E R A T O R 5 fo 9 ...

Page 154: ...PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED TH BLUE OUTLINE V O LT A G E AMD W AVEFORM INSTRUCTIONS APPEAR AT T H E L E F T OF DIAGRAM J reference diag ram s 2 VERTICAL OUTPUT AMPLIFIER TRIGGER GENERATOR TIMUJG SWITCH HORIZONTAL AMPLIFIER 3 POWER REGULATOR CRT TYPE 3 2 3 OS CI L L OSCOP E S W E E P G E N E R A T O R J ...

Page 155: ...X F TIMIK1G c a p a c i t o r s t i mi wq RESISTORS k T R I G G E R A U T O CAPACITORS I H O L D O F F I k C A P A C IT O R S 4 R E F E R E M C E D IA G R A M S T R IG G E R GEN ER ATO R SWEEP GENERATOR HORIZONTAL AMPLIFIER 1 1 I I 4R 5f r 5R T Y P E 3 2 3 O S C I L L O S C O P E A TIMING SW ITCH hI t ...

Page 156: ... PLATES 3 SEE PARTS LIST FOR SEMICONDUCTOR TYPES REFERENCE DIAGRAMS TRIGGER GENERATOR SWEEP GENERATOR TIMING SWITCH POWER REGULATOR 4 CRT V O LT A G E AND WAVEFORM INSTRUCTIONS APPEAR AT TM E L E F T OP D IAG R AM O S CI L MRU IZG7 ...

Page 157: ...BL OCK DIAGRAM ...

Page 158: ......

Page 159: ...HORIZONTAL AMPLIFIER S POWER PACK SEE P A R TS L IS T FOR SEM IC O N D UC TO R TY P E S SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE VOLTAGE AND WAVEFORM INSTRUCTIONS APPEAR AT TWE LEFT OF DIAGRAM T Y P E 3 2 3 O S C I L L O S C O P E PO W ER REG UL AT OR C R T CIRCUIT ...

Page 160: ... 7 J f o c r o t j F 7 H O r o X J n u n 7 H 7 3 F F F 7 1 F z n r o o 7 3 O H 7 1 r O O 0 7 3 O O ff in nn r zn 25 Qc O O th 7 J 5 g U T J 7 F O 0 0 pi F f 0 z f _z zh HZ Eu O f h r r 7 3 H F C T 0 O HH P I o o r F pi a 27 ZF I F pi z 3 T J O rn 7J V o A ...

Page 161: ...A TYPE 323 OSCILLOSCOPE ...

Page 162: ...1 TYPE 323 OSCILLOSCOPE ...

Page 163: ...FIG 2 CABINET ...

Page 164: ...OPTIONAL ACCESSORIES 016 0119 00 1 POWER PACK 016 0112 00 1 COVER protective oscilloscope ...

Page 165: ...oot 3 010 0223 00 1 PROBE PACKAGE P6049 4 200 0812 00 1 COVER panel 5 103 0013 00 1 ADAPTER 3 to 2 wire 6 426 0403 00 1 FILTER light smoke gray 7 012 0089 00 1 CORD patch BNC to banana 6 inch red 8 103 0033 00 1 ADAPTER BNC to binding post 346 0051 00 1 STRAP ASSEMBLY not shown 016 0113 00 1 ACCESSORY PACK not shown 070 0750 00 2 MANUAL instruction not shown i TYPE 323 OSCILLOSCOPE ...

Page 166: ...mmediately into printed manuals Hence your manual may contain new change information on following pages A single change may affect several sections Sections of the manual are often printed at different times so some of the information on the change pages may already be in your manual Since the change information sheets are carried in the manual until ALL changes are permanently entered some duplic...

Page 167: ... Apply external DC power between 6 and 16 V to the EXT DC connectors inserting a 0 to 0 5 A ammeter in series with one of the power leads 2 Set the Oscilloscope controls as follows 3 Multiply the applied DC voltage by the current indicated on the ammeter The product should be approximately 1 6 W A product of 2 W or more is an indication of excessive circuit drain and should be checked further by p...

Page 168: ...ascertain that no dead or shorted cells exist If the battery voltage is below 7 2 V individual cell voltages should be checked To check individual cells remove the battery as explained in the Disassembly and Assembly instructions in this section Then use jumper wires to reconnect the battery during this check observing proper polarity All cell voltages should be in excess of 1 2 V Replace bad cell...

Page 169: ...eed 47 Page 1 6 POWER SUPPLY CHANGE portions of Battery Operation to read Battery Operation Batteries Six size C nickel cadmium cells Charge time Power Pack switch set to FULL CHG At least 16 hours Operating time batteries charged at 20 C to 25 C operated at 20 C to 30 C 10 microamperes or less cathode current low intensity Calibrator waveform displayed 7 hours Six division four megahertz signal d...

Page 170: ...TYPE 323 ELECTRICAL PARTS LIST CORRECTION CHANGE TO J15 136 0140 01 Jacktip J350 136 0140 01 Jacktip POWER PACK J611 136 0139 01 J612 136 0140 01 Jack tip Jack tip S15 238 769 ...

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Tektronix 323, Instruction Manual

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