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Tektronix 556 Instruction Manual
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Tektronix 556 Instruction Manual

Tektronix 556 Instruction Manual

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  • Page 1 K4XL's 4 - KAMA This manual is provided FREE OF CHARGE from the “BoatAnchor Manual Archive” as a service to the Boatanchor community. It was uploaded by someone who wanted to help you repair and maintain your equipment. If you paid anyone other than BAMA for this manual, you paid someone who is making a profit from the free labor of others without asking their permission.
  • Page 2 IVIAIM UAL Serial Num ber TYPE OSCILLOSCOPE Tektronix, Inc. S.W. M illik a n W a y • P. O . Box 500 • Beaverton, O regon 97005 • Phone 644-0161 • Cables: Tektronix 0 7 0 -0 7 5 7 -0 0...
  • Page 3 A n y questions w ith respect to the w a r­ ra n ty m entioned above should be taken up w ith your Tektronix Field Engineer. Tektronix re p a ir and re p lace m e n t-pa rt...
  • Page 4 1 2B and o th e r standards o f the electronics indus­ try . C hange in fo rm a tio n , if a ny, is located a t the rear o f this m anual. Type 556...
  • Page 5 Serial num bor 2 0 0 0 and up. Serial num ber 1 9 9 9 and below . Fig. 1 -1 . Type 5 5 6 Oscilloscopes. Type 55 6...
  • Page 6 Introduction 0.1 [is to 50 s (calibrated) after application of a trigger pulse. The Type 556 Oscilloscope— is a versatile dual-beam labor­ This feature permits the delayed B sweep to expand a atory type instrument providing accurate voltage and time selected portion of the undelayed A sweep, thereby pro­...
  • Page 7 Characteristics— Type 556 Characteristics Performance S pecification S upplem ental Inform ation Incremental Delay Time Accuracy 5 s/cm to 1 /i,s/cm ± 1 % indicated incremental delay Incremental Delay Time is the difference time ± 4 % of A TIME/CM setting.
  • Page 8 Characteristics— Type 556 AMPLITUDE CALIBRATOR C haracteristic Performance S pecification S upplem ental In form ation Voltage Accuracy 5 mA Current Loop Accuracy ± 2 % . 1 kHz ± 2 5 % Repetition Rate 45% to 55%. D u ty C ycle Risetime <...
  • Page 9 ENVIRONMENTAL CHARACTERISTICS be obtained by contacting your local Tektronix Field Office or representative. The Type 556 has been designed to operate over a temper­ ature range of 0° C to + 5 0 ° C, altitude up to 15,000 feet. ACCESSORIES The non-operating storage temperature range is —40°...

  • Page 10: Operating Instructions

    Type 55 6 SECTION 2 OPERATING INSTRUCTIONS Change information, if any, affecting this section will be found at the rear of the manual. General SN 2000-up This section of the manual provides for the effective use of A Line Voltage selector assembly is provided to facilitate the instrument by describing the function and operation of changing the power transformer turns ratio (see Fig.
  • Page 11 O p e ra tin g Instructions— Type 5 5 6 SN 1 0 0 -1 9 9 9 menclature o f SOURCE to provide this complex switching function. The selections Instruments w ith serial numbers 100-1999, unless tagged o f the two position selector switch are: otherwise, are connected at the factory for operation at 115 volts (nominal).
  • Page 12 O p e ra tin g Instructions— Type 55 6 From Y ellow <1. • t « • ir» « • *h <h f <A1 104 V Store extra jum per hero Rod on From F1402 From FI 4 0 2 From FI 402 Green on...
  • Page 13 Operating Instructions— Type 5 5 6 INT NORM: From trigger pickoff in the Upper Beam oscilloscope vertical am plifier respective plug-in unit. DISPLAY Selects vertical (Y-axis) and horizontal (X- axis) mode of operation for the Upper INT PLUG IN: From trigger pickoff in the Beam.
  • Page 14 Operating Instructions— Type 556 CALIBRATED. An UNCAL neon turns on B TIME/CM switch sets the sweep rate when the VARIABLE control is not in the of the Lower Beam. CALIBRATED position. RIGHT PLUG-IN EXT: Right plug-in signal provides the vertical deflection while...
  • Page 15 A TIME/CM (OR SELECTION OF PLUG-IN UNITS DELAY TIME) switch and the DELAY-TIME MULTIPLIER control. The Type 556 Oscilloscope is designed to use Tektronix letter-series and 1-series plug-in units as the input stages for A GATE Output connector which supplies a posi­...
  • Page 16 For In te g ra tio n , D iffe re n tia tio n , Function G eneration, variety of plug-in units that can be used with the instrument. Linear and N on-Linear Uses The Type 556 Oscilloscope should not be used without 50 mV/cm to DC to 25 MHz 14 ns plug-in units installed or connected by extensions.
  • Page 17 AMPLITUDE CALIBRATOR 50 mVOLTS A clear plastic faceplate protector is provided with the Type 556 for use when the mesh filter or the tinted filter Rear Panel are not used. The clear faceplate protector provides the best display for waveform photographs. It is also preferable...
  • Page 18 Operating Instructions— Type 5 5 6 A . Front Panel UPPEB BEAM COWER BEAM CHOPPED BLANKING CHOPPED BLANKING mmtm/mmmtxxxmwA —1 5 ® 5 )5 $K 8 ^ B. Center p o rtion o f rear panel. Fig. 2 -3 . C ontrol setup chart fo r Type 5 5 6 SN 2 0 0 0 and up. 2 -9 <...
  • Page 19 Operating Instructions— Type 556 B. Center po rtion o f rear panel. Fig. 2-4. Type 55 6 control setup chart fo r instruments w ith serial number 1999 and below.
  • Page 20 Control Setup Chart Fig. 2-3 and Fig. 2-4 show the front panel and a portion of the rear panel o f the Type 556. If the controls of the plug-in Fig. 2 -5 . O utput waveforms ava ila b le a t the fro n t panel.
  • Page 21 Operating Instructions— Type 556 O utput o f device is ap p lie d to vertical p lug -in unit Fig. 2-6. Using the A GATE or A SAWTOOTH waveform to trig g e r o r drive an external device. Sweep is usually free running.
  • Page 22 5 of the interconnecting trigger signal. Signals with low-frequency components below plug, such as the Tektronix Types 1A1 and 1A2 Dual-Trace about 30 Hz w ill be attenuated. In general, AC coupling can Plug-In Units. This position is useful when operating the plug­...
  • Page 23 Operating Instructions— Type 5 5 6 SLOPE LEVEL LEVEL control set in the -J- region. SLOPE SLOPE LEVEL W aveforms a n d (D ) obtained w ith the Triggering LEVEL control set in the — region. Fig. 2-8. Effects o f Triggering LEVEL control and SLOPE switch. 2-14...
  • Page 24 Operating Instructions— Type 556 rejected and signals outside the given range are attenuated. To set the LEVEL control, first select the Triggering When triggering from complex waveforms, this position SOURCE, COUPLING and SLOPE switch positions. Then set is useful for providing a stable display of low-frequency the LEVEL control a few degrees either side of 0 (except for components.
  • Page 25 Operating Instructions— Type 556 tinuously variable sweep rates between the settings of the TIME/CM switch. Whenever the UNCAL light for either A or B is on, the sweep rate of either A or B Sweep Generator (or both if both UNCAL lights are on) is uncalibrated. The...
  • Page 26 Type 556. To use the single-sweep mode, first set the Triggering MODE switch to TRIG and then be sure to set the LEVEL control so the sweep trigger circuit will trigger on the event that is to be displayed.
  • Page 27 This modo allows tho B swoop to bo triggered by any triggering ovont follow ing the delay time (seo Fig. 2-13B). To demonstrate, set up the Type 556 controls in the same manner as described previously for Modo 1, oxcept this inform ation should be substituted for steps 8 through 10.
  • Page 28 Operating Instructions— Type 556 right plug-in unit Input connector. Connect a coaxial cable External Horizontal Deflection from the A GATE to the B TRIGGER INPUT connector. To deflect one of the CRT beams horizontally with an Set these controls as follows:...
  • Page 29 Operating Instructions— Type 556 Fig. 2*13. Comparison o f the tw o delayed-sw eep modes. In each case the Upper Beam presentation represents the in p u t to both vertical systems. The intensified po rtion o f the U pper Beam displa y shows the p a rt o f the in p u t wavefrom th a t is displayed by the Lower Beam.
  • Page 30 BASIC APPLICATIONS single input applied to the other beam. The following information describes the procedure and technique for making basic measurements with the Type 556 Provision is included in the oscilloscope for blanking the between-channel switching transients when operating a multi­...
  • Page 31 Operating Instructions— Type 556 NOTE age is negative with respect to ground, position the trace to a reference line above the Lower Beam graticule center This technique may also be used to make vertical line. Do not move the vertical plug-in Position control after measurements betw een tw o points on the w a v e ­...
  • Page 32 Operating Instructions— Type 5 56 line, using a 10X attenuator probe and an attenuator set­ A pply the signal to the Input connector, and measure ting of 2 volts per cm. the deflection. The amplitude may be determined by the following formula: Using the formula: Adjusted...
  • Page 33 Time measurements between two time-related events may be made using a Dual-Trace plug-in such as the Type 1A1 and a single beam display of the Type 556. To simplify procedure steps, assume that the Lower Beam w ill display Channels 1 and 2 of the right plug-in. Use the following procedure: Fig.
  • Page 34 C. Time-comparison measurements may also be made using both beams of the Type 556 and two single-channel vertical plug-ins. Time-related events can be displayed by both beams if the beams are both driven at the same sweep rate. It is generally advisable to use the same time base for driving both beams to reduce the overall error resulting from sweep rate tolerances.
  • Page 35 Operating Instructions— Type 556 The Lower Beam should show a magnified display of the Example: Assume the first dial reading is 3.28 and the intensified portion of the Upper Beam display. second dial reading is 7.41 with the A TIME/CM switch set to 2 mSEC (see Fig.
  • Page 36 Operating Instructions— Type 5 5 6 NOTE Displaying Complex Signals Using Delayed Sweep It may be necessary to adjust the fro n t panel C O N ­ TRAST control in o rde r to view the intensified p o r­ Complex signals often consist o f a number o f individual tion o f the Upper Beam d is p la y more easily.
  • Page 37 Operating Instructions— Type 556 shown in Fig. 2-23, the 10% point would be 0.5 cm up from the start of the rising portion. NOTE If the fastest sweep speed ( lO n s /c m ) is used, set th e T rig g e rin g LEVEL co n tro l so the rising p o r­...
  • Page 38 CRT as though the Type 556 were triggered in the normal manner. 11. Measure the horizontal difference between correspond­ ing points on the waveform.
  • Page 39 Operating Instructions— Type 5 5 6 MAG switch set to X 10. W ith a horizontal difference of 6 (without changing the B TIME/CM VARIABLE control setting). cm, the phase difference is: One of the easiest ways to increase the sweep rate is with the Lower Beam DISPLAY MAG switch.
  • Page 40 First Basic Mode (Fig. 3-1) Upper Beam— Vertical deflection by signals from either plug­ In this mode of operation the Type 556 is operating as in unit. Horizontal deflection by sweep signals from two completely independent systems. A signal applied to the either A or B time base generator or by signals from left plug-in unit is coupled to the Left Vertical Input Am pli­...
  • Page 41 +■ A SWEEP *> TRIGGER CONDITIONS: Two single-input p lug -in units are used; one signal to each. Type 556 control settings: © A TRIGGERING.... LEFT, INT, NORM, AUTO STABILITY (trig ­ gered sweep) Upper Beam DISPLAY. LEFT PLUG-IN A B TRIGGERING....RIGHT, INT,...
  • Page 42 Sweep Generator circuits. The A Sweep Generator and Upper Beam Horizontal Am pli­ In this mode of operation the Type 556 is operating as two fier circuits drive the Upper Beam horizontal deflection plates. interconnected vertical deflection systems.
  • Page 43 A SWEEP fo r most applications so this minimizes *■ TRIGGER load ing o f the device under test. ( 5 ) Type 556 control settings: TRIGGERING....RIGHT, INT, NORM, AUTO STABILITY (trig­ gered sweep) U pper Beam DISPLAY. . RIGHT PLUG-IN TRIGGERING....
  • Page 44 UPPER BEAM HORIZONTAL GENERATOR TRIGGER HORIZ IN connector. AMPLIFIER ( 5 ) Type 556 control settings: TRIGGERING....N ot used. U pper Beam DISPLAY . . . RIGHT PLUG-IN TRIGGERING....RIGHT, INT, NORM, AUTO UPPER BEAM STABILITY (trig­...
  • Page 45 Two single-input p lug -in units are used. U pper Beam Signal to be displayed is applied to right 'DISPLAY Sw p lug -in only. UPPER -► Type 556 control settings: A SWEEP A SWEEP BEAM TRIGGERING....N ot used. GENERATOR HORIZONTAL TRIGGER <...
  • Page 46 Single and dual-trace p lug -in units are used. Signals are applied to the righ t p lu g -in dual-trace unit operating in the alte rnate mode. ( ? ) Type 556 control settings: A TRIGGERING.... RIGHT, INT, PLUG-IN, AUTO STABILITY (trig­ gered sweep) U pper Beam DISPLAY.
  • Page 47 Sixth Basic Mode (Fig. 3-6) The push-pull output o f the left plug-in, with a fixed DC For the conditions given in Fig. 3-6, the Type 556 is opera­ level of about +67.5 V, is applied to the Input Cathode ting as two interconnected vertical deflection systems with Follower V3 stage (see Fig.
  • Page 48 Two single -inpu t p lug -in units are used. Signal to be displayed is ap p lie d to righ t plu g -in only. ( 5 ) Type 556 control settings: TRIGGERING.... RIGHT, INT, NORM, AUTO STABILITY (trig­...
  • Page 49 Circuit Description— Type 556 ing stage to be described later. Diodes D8, D108, D9 and The push-pull internal trigger output from Q74 and Q174 D109 (for SN 100-1999, D7, D8, and D108) provide pro­ is applied to the Trigger Pickoff E.F. stage.
  • Page 50 Circuit Description— Type 55 6 The error signal is applied to the base of Q83. This If the Upper Beam DISPLAY switch is set to the RIGHT transistor operates as an emitter follower for the error signal position, just the opposite occurs. + 5 0 V is applied to D17 which is then applied to the base of Q84.
  • Page 51 Circuit Description— Type 5 5 6 Left Plug-In Signal Left Plug-In Signal From Signal To O utput E. F. Input E. F. |Q43, Q143) <T> (Q3, Q103J < j> 50 V - * 72 V - + Right Plug-In Signal Right Plug-In Signal From Signal To O utput E.
  • Page 52 Circuit Description— Type 55 6 Fig. 3 -9 . P artial block diag ram o f Left and Right V ertical O utput A m plifiers. works C42-R42 and R142-C142 are temperature compensa­ In the RIGHT PLUG-IN positions of the switch, the regula­ tions for Q44 and Q144.
  • Page 53 Circuit Description— Type 556 Trigger SOURCE Switch Positions: 'Left Plug-In N orm al Internal Trigger LEFT, INT, . TRIGGER LEVEL From LEVEL Control NORM CENTERING Trigger Pickoff E. F. w ith PULL (Q73, Q173) <$> FOR 10X RANGE INCREASE Sw...
  • Page 54 Circuit Description— Type 556 If the SLOPE switch is set to —, the signal will be applied to A SWEEP TRIGGER<£> the grid of V534B and w ill be inverted when applied to D555 Trigger Source so D555 can switch on the falling (positive-going) portion of the displayed waveform.
  • Page 55 Circuit Description— Type 556 3. Negative-going gate signal during the A Sweep to curve of a tunnel diode). When a positive-going trigger is applied to the grid of V534A, the trigger is negative-going D1024 in the Alternate Trace Logic and Blanking circuit.
  • Page 56 Circuit Description— Type 5 5 6 Fig. 3 -1 2 . Block diagram o f the A Sweep G enerator circuit. 3 -1 7...
  • Page 57 Circuit Description— Type 5 5 6 ■High State + 0 .4 9 V Gate W aveform at Tunnel Diode D565 — 0.01 V Anode + 9.5 V G ate W aveform a t Q 56 3 and Q 573 Emitters + 0 .
  • Page 58 Circuit Description— Type 55 6 + 9 . 5 V A-Sweep G ale W aveform a t Q 56 3 an d Q 573 Em itters + 0 . 5 V Sweep— Clamped by D 799 + 129 V N orm al A-Sweep U nblanking Pulse a t V 5 7 4 A Plate...
  • Page 59 Circuit Description— Type 556 Sweep Timing Switch diagram; more details about this dia­ First A Sawtooth Cathode Follower V 67 3 A gram are given later). The First A Sawtooth Cathode Follower V673A stage As C660 begins to charge, a negative-going change in...
  • Page 60 Circuit Description— Type 55 6 cut off. V625A cathode resets at about + 1 2 V. Diodes D614, When triggers are applied to D565 and D765 (in the B D616, D624, D635 and D678 are reverse-biased; D627 and Sweep Generator circuit), both sweeps start. As the A sweep D629 are conducting.
  • Page 61 D565. This extra current causes D565 to be held at a thres­ position, the switch grounds the collector of Q615 and dis­ hold level that enables the Holdoff M ultivibrator to switch ables the automatic stability feature of the Type 556. 3 -2 2 <D...
  • Page 62 Circuit Description— Type 556 Upper Beam Unblanking Am plifier V 57 4 A is set to RIGHT PLUG-IN A, Lower Beam DISPLAY switch is set to RIGHT PLUG-IN B, the B sweep is operating faster When the Upper Beam DISPLAY switch SW185 is set to...
  • Page 63 C823 and R822, and through D824 to the cathode of V825B, the pulse drives V825B into cutoff and Assume the Type 556 circuits are set for these conditions: causes the multivibrator to switch states. V825B is now cut off, V825A is conducting, and the B sweep is ready to be 1.
  • Page 64 In addition, the trigger is applied to the DLY'D TRIG con­ drive the base of Q924, the trigger is taken off at the nega­ nector J935 on the front panel of the Type 556. This trigger is available for use in externally triggering other equipment.
  • Page 65 Circuit Description— Type 556 Fig. 3 -16. Block diagram o f A ltern ate Trace Logic and Blanking circuits fo r Type 5 5 6 instruments w ith serial number 2 0 0 0 and up. 3-26...
  • Page 66 A Sweep Inhibit Gate to H oldo ff M ulti V 625 <3> CONDITIONS: Chopped M ) Type 556 control settings: Blanking Pulse Upper Beam DISPLAY..... RIGHT PLUG-IN A to Lower Beam Lower Beam DISPLAY..... RIGHT PLUG-IN B B M O D E ............NORM...
  • Page 67 Circuit Description— Type 556 ALTERNATE TRACE the logic for producing one alternate trace sync pulse per last sweep to end. To accomplish this logic, +1 0 0 V is LOGIC & BLANKING applied to the collector circuits of Q1015 and Q1025 to disable the multivibrator stage and reverse bias D1021.
  • Page 68 Circuit Description— Type 556 Left Alternate Trace Sync Pulse Amplifier The signal generated at Q1025 collector is applied to the base of Q1033. The only portion of the signal that is used V 1 0 4 3 A to produce an alternate-trace sync pulse is the portion gen­...
  • Page 69 Circuit Description— Type 556 Conditions: Upper Beam Right plug -in Ch-1 Right p lug -in Ch-2 DISPLAY-RIGHT PLUG-IN signal displayed signal displayed A, A TIM E/CM - 0.1 mSEC, by one A sweep —► by one A sweep - ^...
  • Page 70 Circuit Description— Type 556 through C l051 to the grid of V1043B for amplification. The Amplifier V1174-V1184, Capacitance Driver V I 194, and Exter­ amplified and inverted pulses are applied through the UPPER nal Horizontal Amplifier V I 104. BEAM CHOPPED BLANKING position of the CRT Cathode Selector SW1395 to the Upper Beam cathode of the CRT.
  • Page 71 Type The composite signal output (DC-positioning and signal 556, thus limiting the grid-to-cathode voltages at that time. current) from the collector of Q1135 is applied to a compen­ sated divider network R1141, R1142 and Cl 141. The divider output is applied to the base of Q1145.
  • Page 72 CRT CIRCUIT 0 3 , The CRT in the Type 556 has two sets of vertical deflec­ High Voltage Delay Q 1 3 3 4 tion plates and two sets of horizontal deflection plates, The High Voltage Delay circuit consists of Q1334 and operated independently of each other.
  • Page 73 Beam Chopped Blanking Am p V1063B <§> 556 s / N 218 up. Some Instruments were modified out of sequence. * Added in T yp e Fig. 3-20. P artial block diagram o f CRT circuit showing the LowerBeam section and those adjustments th a t are common to both beams.
  • Page 74 CRT Control-Grid and Unblanking Circuit The EXT CRT CATHODE BNC connector on the rear panel of the Type 556 provides an input for externally modulating As stated eariler, D1322 rectifies the high voltage from the Lower Beam CRT cathode. The connector is normally T1301 secondary winding (terminals 6 and 9).
  • Page 75 Circuit Description— Type 556 along with the two main primary windings may be used to POWER SUPPLY allow the instrument to run on nominal line voltages of 104, 115, 208, and 230 volts, depending upon how all the windings HEATER W IRING (ft: are connected.
  • Page 76 Circuit Description— Type 556 Fig. 3 -2 1 . Block diagram o f Power Supply circuit and p a rtia l circuit o f Heater W irin g fo r the Type 55 6 SN 20 00 and up. 3 -3 7...
  • Page 77 Circuit Description— Type 556 Fig. 3 -22. Block diagram o f Power Supply circuit and p a rtia l circuit o f Heater W irin g fo r the Type 556 SN 100 to 1999, 3-38...
  • Page 78 Circuit Description— Type 556 a Q1517 collector to emitter drop which equals the difference Q1454 with its associated circuitry forms the error sensing between the rectifier output voltage and 150 volts. When the circuit. The base of Q1454 is connected to a resistance net­...
  • Page 79 The plate of V1605A operates from the + 1 0 0 V supply while the The Calibrator circuit in the Type 556 is a 1 kHz square- plate of V1605B operates from the +2 2 5 V supply. The plate wave generator (see Fig.
  • Page 80 Circuit Description— Type 556 the CAL OUT connector. W ith the switch set to 100 V DC, of V1605C is exactly 100 V peak to peak, the divider net­ work accurately divides the basic 100 V square wave to lower the Calibrator M ultivibrator stage is disabled because the cathode return circuit is disconnected from —...
  • Page 81 NOTES...
  • Page 82 Phillips-head screws. damage may be repeated. For further acces to the internal circuitry o f the Type 556 any o f the corner rail angles can be removed by using a Transistor and Tube Checks Phillips screwdriver.
  • Page 83 Due to the presence of normal stray fields and capacitance CORRECTIVE MAINTENANCE within the instrument, the locations of some components in the Type 556 are important to the operation of the system. General Be sure to install replacement components in the exact posi­...
  • Page 84 Beam high-voltage compartment on the right side of the the soldering techniques described earlier). instrument. Additional silver solder should be available locally or it can be purchased directly from Tektronix; order by Tektronix Part No. 251-0514-00. Observe the following precautions when soldering ceramic terminal strips: ^ i:iir r in r ^ 1.
  • Page 85 Maintenance— Type 5 5 6 Component Replacement Removal (See Fig. 4 -5 ) 1. At the rear of the instrument, remove the four cap nuts Transistor and Tube Replacement. Transistors and tubes securing the air filter housing. Remove the housing and air should not be replaced unless actually defective.
  • Page 86 M a in te n a n ce — Type 556 Fig. 4 -4 . Location o f lin o fusos. 4 -5...
  • Page 87 M aintenance— Type 55 6 CRT Shield Assembly CRT Socket W in g N ats Fan Assembly Fastening Screw Fan A tte m b ly Fastening Screws Fan A tie m b ly H in g e Fan Assembly Fastening Screw Fig.
  • Page 88 The follow ing information is provided to facilitate trouble­ Fig. 4-7. CRT filament lead locations (Lower Beam). shooting o f the Type 556. Information contained in other sections o f this manual should be used in conjunction with 4. Remove bolh vertical plug-ins from the instrument.
  • Page 89 Maintenance— Type 5 5 6 component in this instrument are indicated on the diagrams. the main circuits in the Type 556 and the series o f circuit Important voltages and waveforms are also shown. numbers assigned to each. For example, a resistor numbered R930 is identified as a component in the Delay Pickoff circuit.
  • Page 90 The first few checks assure proper connection, operation and calibration. If the 4. Isolate trouble to a particular circuit. The Type 556 trouble is not located by these checks, the remaining steps incorporates a significant feature in its design that greatly aid in locating the defective component.
  • Page 91 Trace Logic Circuit, the test oscilloscope should be externally circuit. triggered by the A GATE signal from the Type 556. The Type 556 can be used to signal-trace all of its own The Type 556 contains 15 main circuits. The normal inter­ circuits except: connections between these circuits is given in Table 4-5 to aid in circuit isolation.
  • Page 92 Lower Beam section, or a separate test oscillo­ Fig. 4 -1 0 . W aveform source iden tification . scope is used to obtain the particular waveform. The Type 556 graticule is shown with its eight vertical divisions, whereas 8. Check Individual Components. The following pro­...
  • Page 93 If substitute reversed. transistors or tubes are not available, a dynamic tester may be used (such as Tektronix Type 570 or 575). Static type CAUTION testers are not recommended, however, since they do not check operation under simulated operating conditions.
  • Page 94 NOTES...
  • Page 95 This section of the manual provides a means of rapidly 9. Plug-in preamplifiers with dual-channel inputs, vertical checking the performance of the Type 556. It is intended to deflection sensitivity to 5 millivolts/cm. Tektronix Type 1A1 or check the calibration of the instrument without the need for equivalent, 2 required.
  • Page 96 Rear Panel Controls controls fully counterclockwise. Upper Beam CRT Cathode EXT CRT CATHODE 4. Set the Type 556 POWER switch to O N and set the Selector autotransformer for 115 VAC (or 230 VAC). Lower Beam CRT Cathode EXT CRT CATHODE Selector 5.
  • Page 97 Performance Check— Type 5 5 6 TABLE 5-1 C a lib ra to r A m p litu d e A ccuracy Check Type W con tro l settings S tandard AMPLITUDE Comparison Input A m p litu d e CALIBRATOR Vc Range V o lta g e (V c)
  • Page 98 Adjust both plug-in vertical position controls so that e. Clip the probe to the current loop on the front panel of the time-mark base line is below the viewing areas for the the Type 556. two beams. f. Rotate the AMPLITUDE CALIBRATOR switch through all h.
  • Page 99 Replace the Type 1A1 plug-ins with two test load units. Allow at least three minutes for the Type 556 to stabilize. c. Set the test load unit Test Function switches to Common Fig. 5-3. Typical CRT displays showing (A ) poor geom etry adjust­...
  • Page 100 Performance Check— Type 556 e. Using the TRACE SEPARATION control, position the Check— Display amplitude of 4 cm ± 1 .2 mm. Upper Beam trace so it is superimposed on the Lower Beam Remove the calibrator signal from the left plug-in unit trace.
  • Page 101 The fo llo w in g procedure applies o n ly to a Type switches to Common Mode. 556 connected to a nom inal 1 1 5 -vo lt 3 -w ire pow er source. For an instrum ent connected to oth e r than e.
  • Page 102 141.4 peak VAC a t the autotrans­ former output, or 100 volts RMS. u. W a it two minutes to allow the Type 556 to stabilize, and observe the position of the Upper and Lower Beam traces.
  • Page 103 Performance Check— Type 5 5 6 k. Rotate the A TIME/CM and B TIME/CM switches through b. Remove the test load units and in their place install the all positions from 1 mSEC to .1 /xSEC, keeping the A and B Type 1A1 plug-in units.
  • Page 104 Performance Check— Type 556 0. Check— No stable display may be obtained with adjust­ ab. Check— Display not triggered. ment of the LEVEL control. Push in the A Triggering LEVEL control knob and dis­ connect the Standard Amplitude Calibrator signal.
  • Page 105 Performance Check— Type 556 to 6 MHz. Set the Type 556 B TIME/CM switch to .5 /xSEC, d. Set the A TIME/CM switch to 1 mSEC. and the display amplitude to 1 cm. e. Set the A Triggering COUPLING switch to AC LF REJ.
  • Page 106 Replace the low-frequency signal generator with the and a free-running display in the remainder of the rotation constant amplitude generator; set the generator frequency to 6 MHz. Set the Type 556 A TIME/CM switch to 15 /xSEC, area. and the display amplitude to 1 cm.
  • Page 107 Use steps (c) through (g) as a guide for the B sweep, the measurements from the g ra ticule, the area between right plug-in unit and Type 556 front-panel control settings. the first-cm and ninth-cm graticule lines provides the most linear measurement. Therefore the 0-cm Check—...
  • Page 108 Low Load e. Return the DISPLAY M AG switch to X I and disconnect the time-markers from the Type 556. c. Connect a 50 Q cable from the time-mark generator through a 50 O termination to the right test load unit Ext 32.
  • Page 109 Performance Check— Type 55 6 k. Check— The dial reading should be 9.00 ± 1 0 minor SLOPE divisions. MODE AUTO STABILITY . Check— The difference obtained between the dial read­ LEVEL Fully clockwise, knob ings obtained in steps (i) and (k) should be 800 minor divisions pulled outward ±...
  • Page 110 Performance Check— Type 5 5 6 37. Check Timing and Delaying Sweep Accu­ 0-< 1-cm racy— A Sweep a. Requirement— A Sweep accuracy, ± 3 % or ± 2 .4 mm; 4th cm sine-wave peak delaying sweep, within 8 minor divisions of the DELAY-TIME repositioned to MULTIPLIER dial for each position of the A TIME/CM switch.
  • Page 111 0-cm graticule line. (Turn up the INTENSITY control play. temporarily to see the start of the waveform for proper b. Set the Type 556 and plug-in unit controls as follows: positioning.) A Triggering Controls Change the Lower Beam DISPLAY MAG switch to X10.
  • Page 112 ± 2 .4 mm. Requirement— Trigger delay equal to or less than 150 TABLE 5 -3 nanoseconds. Tim ing Accuracy— B Sweep b. Preset the Type 556 controls as follows: Check Lower Time M ark B TIM E /C M G e nerator...
  • Page 113 Performance Check— Type 5 5 6 4 4. Check External Horizontal Amplifier Vari­ 4 3. Check External Horizontal Amplifier DC Balance— Upper Beam able Control Range— Upper Beam a. Requirement— No more than ± 5 cm horizontal shift of a. Requirement— A t least a 10:1 ratio of horizontal deflec­ tion control.
  • Page 114 Performance Check— Type 556 47. Check M agnifier X 1 - X 10 Ratio Accu­ 50. Check External Horizontal Amplifier racy— Upper Beam and X l O Compensation— Lower Beam a. Requirement— Front corner of waveform showing no a. Requirement— Ratio of 10:1, within 3%.
  • Page 115 Performance Check— Type 5 5 6 Test Load Units (both) Test Function Low Load Test Oscilloscope Time/cm 5 milliseconds c. Connect a 1 0 X probe to the test oscilloscope vertical am plifier input connector. d. Set the test oscilloscope vertical deflection switch to 5 volts/cm.
  • Page 116 Set the controls as follows: m. Change the left plug-in unit Test Function switch to — Pulse, and the Type 556 A Triggering SLOPE switch to — . A Triggering Controls The waveform w ill now appear as a negative-going pulse.
  • Page 117 Performance Check— Type 55 6 " (A ) Upper Beam Fig. 5 -1 4 . Correct positio ning o f Lower Beam waveform fo r risetime check. NOTE W hen pe rform ing steps 59 through 61, take into consideration sweep tim ing error, if any, a n d /o r geom etry and o rth o g o n a lity in the area w here the measurement is made.
  • Page 118 Performance Check— Type 5 5 6 point on the rising portion crosses the intersection of the 1-cm b. Check that the B TIME/CM switch is set to .1 fiSEC. horizontal graticule line and the graticule center vertical line. c. Set the Lower Beam DISPLAY MAG switch to X 10. See Fig.
  • Page 119 A complete procedure is provided in this section for check­ your local Tektronix Field Office or representative. ing the calibration o f the Type 556, and for making adjust­ ments when necessary. 1. Test oscilloscope. Bandwidth, DC to 10 MHz; minimum deflection factor, 0.005 volts/division;...
  • Page 120 Calibration— Typo 5 5 6 Fig. 6 -1 . Recommonded ca lib ra tio n equipm ent. Item * 1 throug h 12.
  • Page 121 C a lib ra tio n — Type 55 6 Fig. 6-2 . Recommended calibraH on equipm ent. Items 13 throug h 23. 6 -3...
  • Page 122 1 volt output, Heathkit Model 1G-72 or equivalent. 13. Current probe. Sensitivity, 1 milliam p/division; accu­ A djustm ent tools (see Fig. 6 -3 ) racy, within 3% . Tektronix P6019 Current Probe with Type 134 Am plifier recommended. T ektronix Description 14.
  • Page 123 (page 6-16) This Abridged Calibration Procedure is provided to aid Trace parallel to horizontal graticule lines. in checking the operation of the Type 556. It may be used as a calibration guide by the experienced calibrator, or it □ 13. Check Beam Finder Switch Operation (page 6-17) may be used as a calibration record.
  • Page 124 Tolerance, ± 3 % or ± 2 .4 mm. □ 39. Adjust B Sweep Sawtooth Slope (page 6-34) Timing adjustment to match the B sweep generator to This step is not applicable to 556 instruments with serial numbers 100 to 1999. the A sweep generator. □...
  • Page 125 77. Adjust Vertical Amplifer High Frequency Compensa­ 4. Install two test load units in the Type 556. tions— Right (page 6-55) <2.2 5% overshoot, rolloff, or ringing. 5. Preset the Type 556 and test load unit controls as follows: 6 -7 ®...
  • Page 126 Calibration— Type 5 5 6 Fig, 6 -4 . In itia l t o il to lv p fo r pow or tu p p ly vo lta g o ad ju itm o n t. Typo 5 5 6 B Triggering Controls NORM INT, RIGHT SOURCE...
  • Page 127 Calibration— Type 5 5 6 d. Check— A reading of — 150 volts, ± 1 .5 volts. Rear Panel Controls Upper Beam CRT e. Adjust R1498 (Fig. 6-4) for a reading o f — 150 volts. EXT CRT CATHODE Cathode Selector f.
  • Page 128 55 6 connected to a n o m in a l 1 15 -vo lt 3 -w ire p o w e r 556 power cord to the power socket ascmbly, as shown in source. For an instrum ent connected to other than Fig.
  • Page 129 Remove the probe tip, and change the Input Atten to N Remove the probe tip and ground lead from the power socket contacts, connect the probe tip to the Type 556 + 100- r. Connect the probe to the — 150-volt fuse, and change volt fuse (output end), and connect the probe ground lead to the Input Atten to 1.
  • Page 130 Disconnect the probe and ground lead from the Type Peak-to-Peak W ith the Type 556 pow er supply re g u la tio n circuits o pe ra tin g n orm a lly, the DC re gulated voltages w ill...
  • Page 131 Calibration— Type 55 6 Test Point — 1850 volts M eter lead at ground Fig. 6 -1 1 . Test setup fo r ad ju stin g high voltage— U pper Boam. Fig. 6 -1 0 . Test setup fo r ad ju stin g high v olta ge— Lower Boam. NOTES...
  • Page 132 A d ju st A m p litu d e C a lib ra to r a. Tost equipment setup as shown in Fig. 6-12. b. Connoct a 5012 cablo from the Type 556 CAL OUT connector to tho Standard Amplitude Calibrator Unknown Input connector.
  • Page 133 TABLE 6 -2 e. Turn off the Type 556 POWER switch, remove the jum­ per wire, and turn the POWER switch ON. A m p litu d e C a lib ra to r A djustm ent...
  • Page 134 STABILITY. Adjust the Upper and Lower Beam INTENSITY, d. Clip the probe to the current loop on the front panel of FOCUS and ASTIGMATISM controls to obtain well-defined the Typo 556. traces. e. Position the start o f the A and B sweeps to the inter­...
  • Page 135 Calibration— Type 55 6 b. Depress the BEAM FINDER button and hold in this Adjust the TRACE ROTATION control for best alignment position. of the traces with the graticule horizontal lines. Remove the meter leads. c. Rotate first the right and left vertical position controls fully clockwise and counterclockwise, and then the Upper Beam and Lower Beam POSITION controls, while observing the position of both displays.
  • Page 136 Calibration— Type 5 5 6 Fig. 6 -1 7 . T * it i« lu p Geometry adjustm ent. f o r h. Pre-adjust Sawtooth Amplitude controls R678 and R878 14. A d ju st G eom etry for approxim ately 10.5 cm sweep longths. (Sco Fig. 6-33 and a.
  • Page 137 Calibration— Type 556 (B l Right side view Fig. 6*1 8 . Typical CRT displays show ing (A ) p o o r g o o m ttry a d ju s t­ ment! (B l good geom etry adjustm ent.
  • Page 138 Calibration— Type 5 5 6 A Triggering Controls LEFT INT NORM SOURCE COUPLING SLOPE MODE AUTO STABILITY LEVEL Clockwise, knob pushed in Upper Beam DISPLAY LEFT PLUG-IN A Upper Beam DISPLAY M AG A TIME/CM .5 mSEC A VARIABLE CALIBRATED A MODE NORM B Triggering Controls...
  • Page 139 Calibration— Type 5 5 6 19. Adjust Vertical Am plifier DC Balance— © b. Change the right plug-in unit Test Function switch to Right Low Load. c. Using the right plug-in unit Vertical Position control, a. Check— Deviation of the Lower Beam trace from its position the Lower Beam trace to coincide with the horizontal graticule center horizontal line should not exceed 0.5 cm.
  • Page 140 Calibration— Type 5 5 6 Fig. 6 -2 2 . Equipm ent le tu p fo r vertical a m p lifie r g a in a d ju ilm e n ti. 21. A d ju s t V ertical A m p lifie r G ain Lower Beam DISPLAY RIGHT PLUG-IN B Lower Beam DISPLAY M AG...
  • Page 141 Calibration— Type 556 Check— Display amplitude of 4 cm. Center the 2-cm display in the Lower Beam viewing area. Note the display amplitude. j. Adjust G AIN R12 (see Fig. 6-20) for a display amplitude k. W ith the right test load Vertical Position control, move of exactly 4 cm.
  • Page 142 Calibration— Type 5 5 6 Test Oscilloscope Type 5 5 6 .T >-r • • Po wer Cord 2 0 - i n c h Po w o r Socket p o w o r cord As se m bl y Probo Fig.
  • Page 143 Fig. 6-24. m illiseconds/cm . o. W a it two minutes to allow the Type 556 to stabilize, and observe the position of the Upper and Lower Beam traces. p. Check— Vertical drift o f either trace should not exceed 2 mm in the upward or downward direction.
  • Page 144 25. Check Alternate Trace Operation through all positions from 1 mSEC to .1 fiSEC, keeping the A a. Connect the BNC T connector to the Type 556 CAL OUT and B TIME/CM settings the same. connector. Connect two 50 f l cables from the T connector to q.
  • Page 145 Calibration— Type 55 6 » Oscilloscope BNC T connector Fig. 6 -2 6 . Equipm ent setup fo r e xte rna l trig g e rin g adjustments. MODE TRIG 27. Adjust External Triggering— A and B Centered, knob pushed in Sweeps LEVEL Lower Beam DISPLAY...
  • Page 146 Calibration— Type 5 5 6 r. Change the two 50 f i cables from the right plug-in input connector and the B Triggering TRIGGER INPUT con­ nector to the left plug-in input connector and the A Trigger­ ing TRIGGER INPUT connector. s.
  • Page 147 Connect the 1 0 X probo to pin A (to grid o f V534B) on the A trigger switch board (see Fig. 6-30). Check that the Type 556 A Triggering SLOPE switch is set to - f . Sot tho tost oscilloscope vortical deflection switch to 0.2 Volts/cm.
  • Page 148 Set the constant-amplitude generator for a 10-MHz sig­ 6 MHz. Sot the Type 556 B TIME/CM switch to .5 /xSEC, and nal, and adjust the plug-in unit vertical controls to display a the display amplitude to 1 cm.
  • Page 149 MODE switch to AUTO STABILITY. constant amplitude generator; set the generator frequency to 6 MHz. Set the Type 556 A TIME/CM switch to .5/u.SEC, and b. Change the low-frequency generator output signal to the display amplitude to 1 cm.
  • Page 150 Use steps (b) through (f) as a guide for the B sweep, the right plug-in and Type 556 front-panel control settings. e. Check— Stable display with adjustment of the LEVEL control.
  • Page 151 C a lib ra tio n — Type 556 Fig. 6 -3 2 . Equlpm ont «otup fo r basic lim in g procoduros— A and B tw o o p t. MODE AUTO STABILITY 36. A d ju st Basic Tim ing— A Sweep...
  • Page 152 Calibration— Type 556 d. Adjust R1168 (Fig. 6-34) to position the start o f the trace to the graticule center line. e. Repeat steps (a) through (d) until there is no shift of the start o f the trace as the DISPLAY M A G switch is changed from X 1 0 to X I .
  • Page 153 (swoop length is 10.5 cm). Return the DISPLAY M A G switch to X 1 and disconnect tho time-markers from tho Typo 556. 41. A d ju s t Basic Tim ing— B Sweep a. Sot tho Lowor Beam DISPLAY switch to X 1 0 , and posi­...
  • Page 154 Calibration— Type 556 Fig. 6 -3 8 . Equipmont »*top fo r A and B ta w lo o lh current adjust. 0. Connect the I O X Probe tip to the Standard Calibrator A djust Lower Beam A Sweep G ain...
  • Page 155 C a lib ra tio n — Type 55 6 .1 M . R684 R884 A SAWTOOTH B SAWTOOTH CURRENT CURRENT Junction of Junction o f R884 and R684 and R88S IB ) B saw tooth currant adjustm ent and test n o in t locatio n (rig h t I A ) A saw tooth current adjustm ent and test...
  • Page 156 Calibration— Typo 556/R556 . 6 -4 0 . T o it ic lu p fo r a b u ttin g D elay Start and Stop. 4 6. A d ju st D elay S tart a n d Stop...
  • Page 157 C a lib ra tio n — Type 556 Fig. 6 -4 1 . D alay Start and Stop A d ju tl lo ca tio n !. NOTE A djustm ent o f the U pper Beam INTENSITY and CONTRAST co n tro ls m ay be necessary fo r optim um vie w in g o f the in te tn s ifie d p o rtio n o f the d is p la y .
  • Page 158 COUPLING accuracy. SLOPE AUTO STABILITY MODE Set the time-mark generator for 10-microsecond marker output and adjust the Type 556 A Triggering controls for a LEVEL Fully clockwise, knob stable display. pulled outward 6-40...
  • Page 159 Check— The 10th marker is intensified to the marker tip, similar to the wavoform shown in Fig. 6-44. Fig. 6-45. Adjustment locations for A swoop timing, top vlow of Typo 556. 2nd marker intensified to tho marker tip o. Connect a 10-microsecond trigger signal from the time-...
  • Page 160 Typo Calibration— 5 5 6 g. Adjust C l 182 (see Fig. 647) for maximum sweep expansion. h. Adjust C l 172 (see Fig. 6-47) for maximum sweep expansion. Repeat steps (f) through (h) in the same ordor. Position the display so the Upper Beam waveform starts a t the 0-cm graticule line.
  • Page 161 . n e -w o v * p • a k ) ( A ) Fig. Adjustment locations for sweep timing, top view of 6 -4 9 . Type 556. - w a v * wav« fo rm p e a l p o ir u t In...
  • Page 162 Adjust C881 (see Fig. 6-50) to obtain one marker/cm. 52. Adjust Timing— B Sweep s. Interaction— C881 and C860J adjustments interact; set a. Set the Type 556 and plug-in controls as follows: the time-mark generator for 1-microsecond markers and repeat A Triggering Controls steps (j) through (r) until no further adjustment is necessary.
  • Page 163 C a lib ra tio n — Type 556 b. Check— One m arker/cmf Upper Beam display. m. Adjust Cl 265 (see Fig. 6-50) for 1 cycle/2 cm and so the sine-waves peaks a t 1-cm and 9-cm locations coincide with c.
  • Page 164 UNCAL lights should be off. GER INPUT connector. TABLE 6 -4 Check Trigger Delay Tim ing Accuracy— B Sweep Preset the Type 556 controls as follows: Time M ark Check Lower B MODE DLY’D BY A B T IM E /C M...
  • Page 165 Calibration— Type 55 6 S ta n d a rd A m p litu d e C a lib r a to r BNC T C o n n o d o r Parch C ord 5 0 !2 t a b le t Fig.
  • Page 166 Calibration— Type 5 5 6 (A ) U ppor Boom ll o f l s ld t) C1200B IB I Lower Boom Fig. 6 -5 3 . A djustm ent locations, External H orlxo ntal A m p lifie r DC Fig.
  • Page 167 Calibration— Type 556 61. Adjust External Horizontal Amplifier X 10 Compensation— Upper Beam a. Check— Front corner of waveform similar to Fig. 6-55C, and showing no more than 3% overshoot, rolloff, or ringing. —" b. Adjust Cl 115 (Fig. 6-54A) for best front corner and flat top.
  • Page 168 Calibration— Type 5 5 6 67. Check M agnifier X 1 - X 10 Ratio Accuracy -— Lower Beam a. Measure horizontal deflection display observed in step 66d. b. Change the Standard Amplitude C alibrator output to 0.5 volts. f t f 1 c.
  • Page 169 Calibration— Type 55 6 Fig. 6 *5 7 . T*»t equipm ent »otup fo r chocking oxtornal w aveform *. Lowor Beam DISPLAY RIGHT PLUG-IN B A Triggering Controls Lower Beam DISPLAY MAG LEFT INT NORM SOURCE B TIME/CM 1 mSEC COUPLING B VARIABLE CALIBRATED...
  • Page 170 Calibration— Type 556 7 0. Check B Sweep S aw tooth A m p litu d e a. Move the probe tip to the B SAWTOOTH connector. b. Check— Sawtooth waveform amplitude > 9 4 .5 volts for a 10.5 cm B sweep.
  • Page 171 C a lib ra tio n — Type 556 m. Change the left plug-in Test Function switch to —Pulse, and the Type 556 A Triggering SLOPE switch to —. The wave­ form w ill now appear as a negative-going pulse.
  • Page 172 Calibration— Type 556 TABLE 6-5 A djustm ent A re a W a v e fo rm A ffe cte d (a p p ro x im a te distance from le a d ­ edg e n e a r to p...
  • Page 173 Calibration— Type 556 (A ) Upper Beam Fig. 6-62. Example o f misadjustment o f C244, rig h t vertical am pli­ fie r; sweep speed 100 nano$econd$/cm. NORM; and the Upper Beam DISPLAY switch to RIGHT PLUG­ IN A.
  • Page 174 Calibration— Type 5 5 6 horizontal graticule line and the vertical graticule center line. See Fig. 6-63B for correct display positioning. Check— Risetime of the 10%, to 90%, portion of the ris­ ing portion should be 6.93 nanoseconds or less with the test load unit pulse risetime of 3 nanoseconds.
  • Page 175 NOTES...
  • Page 176 If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative w ill contact you concerning any change in part number.
  • Page 177 ABBREVIATIONS A N D SYMBOLS a m p a m p e r e s i n d u c t a n c e a l t e r n a t i n g c u r r e n t l a m b d a —...
  • Page 178 Type 5 56 SECTION 7 ELECTRICAL PARTS LIST Values are fixed unless marked Variable. T ektronix S e ria l/M o d e l N o. C kt. N o._____________Part N o . Eff______________ Disc___________________ D escription Bulbs B619 150-0048-00 Incandescent #683 60m A B663...
  • Page 179 Electrical Parts List— Type 556 C apacitors (con/J T ektronix S e ria l/M o d e l N o. Ckt. No. Part No. D escription Disc 281-0510-00 22 pF 500 V 281-0630-00 390 pF 500 V 281-0528-00 82 pF...
  • Page 180 Electrical Parts List— Type 556 C apacitors (cont) Tektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description C225 283-0028-00 0.0022 50 V j l l C230 281-0510-00 22 pF 500 V...
  • Page 181 Electrical Parts List— Type 5 5 6 Capacitors (cont) T ektronix S e ria l/M o d e l No. Part N o. Disc Description Ckt. No. 0.0022 ju.F C547 283-0028-00 50 V 281-0580-00 470 pF C552 500 V 0.001 283-0000-00 500 V C558...
  • Page 182 Electrical Parts List— Type 556 Capacitors fconfj T e ktro n ix S e ria l/M o d e l N o. Ckt. No. Part N o. Disc D escription C683 281-0010-00 X2000 4.5-25 pF, Var C688 283-0000-00 0.001 500 V...
  • Page 183 Electrical Parts List— Type 5 5 6 Capacitors fcontj T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description C853 283-0002-00 X2000 0.01 tx? 500 V C855 283-0002-00 X2000 0.01 juF 500 V C860A 10 juF...
  • Page 184 Electrical Parts List— Type 5 56 Capacitors ( c o n t) Tektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc D escription Cl 074 281 -0508-00 12 pF 500 V...
  • Page 185 Electrical Parts List— Type 5 5 6 Capacitors fcontj T ektronix S e ria l/M o d e l N o. Description Part N o. Disc Ckt. N o. 283-0621-00 0.0027 /iF Mica 1000 V Cl 303 0.01 /iF 500 V 283-0002-00 Cl 305 500 V...
  • Page 186 Electrical Parts List— Type 556 Capacitors ( c o n t j T ektronix S e ria l/M o d e l N o. Ckt. No. Part N o. Disc Description 10x10x20x40 ju.F Elect. C1424A,B,C,D 290-0294-00 300/400/200/400V C1426A,B/C,D 290-0294-00 10x10x20x40 ixF Elect.
  • Page 187 Electrical Parts List— Type 5 5 6 Capacitors (c o n t) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description 285-0572-00 Cl 624 200 V 281-0525-00 Cl 640 470 pF 500 V 281-0523-00...
  • Page 188 Electrical Parts List— Type 556 Diodes (contj T ektronix S e ria l/M o d e l N o. Description Part N o. Disc Ckt. No. Replaceable by 1N3605 Silicon *152-0185-00 D561 Germanium Tek Spec D562 *152-0075-00 Tunnel Selected TD3A...
  • Page 189 Electrical Parts List— Type 556 (confj Diodes T ektronix S e ria l/M o d e l N o. Ckt. No. Part No. Disc Description D814 *152-0185-00 Silicon Replaceable by 1N3605 D816 *152-0153-00 Silicon Replaceable by 1N4244 D824 *152-0185-00 Silicon...
  • Page 190 Electrical Parts List— Type 55 6 Diodes ( c o n t) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc D escription D1382 152-0192-00 Silicon 7701-5X Varo D1412A,B,C,D (4) 152-0066-00 Silicon 1N3194...
  • Page 191 Electrical Parts List— Type 5 5 6 Connectors T e ktro n ix S e ria l/M o d e l N o. Part N o . Disc D escription Ckt. N o. 131-0018-00 Coaxial, 16 contact J ll Coaxial, 16 contact 131-0018-00 131-0106-01 Coaxial, 1 contact, BNC...
  • Page 192 Electrical Parts List— Type 556 Inductors fcont) N o. T ektronix S e ria l/M o d e l Ckt. N o. Part N o. Disc Description L752 276-0507-00 Core, Ferramic Suppressor L755 *108-0147-01 2.2 juH 1 .1 , L760...
  • Page 193 Electrical Parts List— Type 556 Transistors ( c on t) T ektronix S e ria l/M o d e l No. Ckt. No. Part N o. Disc D escription Q233 *151-0109-00 Silicon Selected from 2N918 Q244 151-0160-00 Silicon 2N3137 151-0190-00...
  • Page 194 Electrical Parts List— Type 556 Transistors (cont) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description *151-0096-00 Q1145 Silicon Selected from 2N1893 Q1154 151-0063-00 1999 Germanium 2N2207 Q1154 *151-0133-00...
  • Page 195 Electrical Parts List— Type 5 5 6 Resistors ( c o n t) T e ktro n ix S e ria l/M o d e ! N o. Ckt. N o. Part No. Disc D escriptio n 311 -0395-00 323-0206-00 1.37 kn Prec 308-0329-00...
  • Page 196 Electrical Parts List— Type 55 6 Resistors (cont) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description ’A w 301-0470-00 47 0 303-0472-00 4.7 ka 315-0473-00 47 ka ’A W 308-0077-00 i ka *310-0631-00...
  • Page 197 Electrical Parts List— Type 556 Resistors (con/) T ektronix S e ria l/M o d e l N o. Ckf. N o. Part N o. Disc Descriptiion y 8 w R108 321-0123-00 187 o Prec v 8 w 321-0129-00 R109...
  • Page 198 Electrical Parts List— Type 55 6 Resistors (cont) T ektronix S e ria l/M o d e l No. Ckt. No. Part N o. Disc Description y 2 w R184 323-0329-00 26.1 kn Prec ’A w R187 302-0100-00 io n R 201 315-0220-00 22 n...
  • Page 199 Electrical Parts List— Type 5 5 6 Resistors (confj T ektronix S e ria l/M o d e l No. Ckt. N o. Part N o. Disc Description R260 315-0221 -00 220 n 305-0152-00 R261 1.5 kn y 4 w 316-0220-00 R262 y 4 w...
  • Page 200 Electrical Parts List— Type 55 6 Resistors (c o n t) Tektronix S e ria l/M o d e l N o. Ckt. No. Part N o. Disc Descripti on 'A w R434 316-0220-00 22 n R440 308-0218-00 150n R441...
  • Page 201 Electrical Parts List— Type 556 Resistors ( c o n t) Tektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description 301 -0202-00 2 kn R544 ' A W 315-0202-00 R544...
  • Page 202 Electrical Parts List— Type 55 6 ( cont) Resistors Tektronix S e ria l/M o d e ! N o. Ckt. No. Part No. Disc Description y 2 w R586 323-0318-00 Prec y 2 w R587 323-0419-00 Prec v * w...
  • Page 203 Electrical Parts List— Type 556 Resistors ( c o n t) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description 7 M n y 2 w R660A \ y 2 w R660B 2.8 M fi...
  • Page 204 Electrical Parts List— Type 5 56 Resistors ( c o n t) T ektronix S e ria l/M o d e l N o. Description Ckt. No. Part N o. Disc 1 Mn 315-0105-00 'A W R712 '/2w 1.3 Mn R714 301-0135-00 330 kn...
  • Page 205 Electrical Parts List— Type 556 Resistors (confj T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description y 4 w R775 316-0101-00 100 n y 2 w R776 301-0474-00 470 kn...
  • Page 206 Electrical Parts List— Type 55 6 Resistors (cont) T ektronix S e ria l/M o d e l N o. Part N o. Ckt. N o. Disc Description R807 302-0103-00 io kn R810 301 -0393-00 39 kfl R811 302-0471 -00 470 0 R813 301-0752-00...
  • Page 207 Electrical Parts List— Type 556 Resistors (cont) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description R860A \ 7 Mn ’A w R860B 2.8 Mn ’A w *312-0641 -01 R860C ( 1.4 Mn...
  • Page 208 Electrical Parts List— Type 55 6 Resistors (cont) T ektronix S e ria l/M o d e l N o. Ckt. No. Part N o. Disc Description 315-0471-00 470 n R909 R910 302-0101-00 ioo n y2 w 316-0101-00 loon ' A W R911 47 kn R912...
  • Page 209 Electrical Parts List— Type 5 5 6 fconfj Resistors T ektronix S e ria l/M o d e l N o. Part N o. Disc Description Ckf. N o. 306-0332-00 R1054 3.3 kn 316-0472-00 4.7 kn ’A W R1060 316-0470-00 47 n R1061 ’A w...
  • Page 210 Electrical Parts List— Type 556 fconfj Resistors T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description R1153 301-0303-00 30 kn R1154 308-0211-00 323-0295-00 R1155 Prec R1157 323-0252-00 4.12 kn...
  • Page 211 Electrical Parts List— Type 5 5 6 Resistors ( c on t) T ektronix S e ria l/M o d e l N o. Description Disc Ckt. N o. Part N o. y 2 w 49.9 k fi Prec 323-0356-00 R1216 'A w 4.7 M n...
  • Page 212 Electrical Parts List— Type 55 6 Resistors ( c o n t j T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description R1284 *310-0601-00 30 kn Prec 316-0470-00 R1286 47 n V4 w 306-0224-00...
  • Page 213 Electrical Parts List— Type 556 Resistors ( c o n t ) T ektronix S e ria l/M o d e l N o. Ckt. No. Part N o. Disc Description R1342 311 -0026-00 R1344 311-0023-00 1999 R13449 311-0596-00 2000...
  • Page 214 Electrical Parts List— Type 556 fconfj Resistors T ektronix S e ria l/M o d e l N o. Description Ckt. No. Part N o. Disc 5.1 kn 301-0512-00 R1396 y 2 w 470Q 302-0471-00 R1397 y 2 w l M a...
  • Page 215 Electrical Parts List— Type 5 5 6 Resistors (conf) T ektronix S e ria l/M o d e l N o. Description Ckt. N o. Part N o. Disc 308-0447-00 25 W R1445 2000 308-0404-00 25 W R1446 1999 250 n 308-0447-00 2000 260 0...
  • Page 216 Electrical Parts List— Type 556 Resistors fconf) T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description R1500 305-0133-00 2000 13 ka R1501 301 -0103-00 1999 10 kn R1501 303-0622-00 2000 6.2 ka...
  • Page 217 Electrical Parts List— Type 5 5 6 Resistors (contj T ektronix S e ria l/M o d e l N o. Ckt. N o. Part N o. Disc Description 10 kn R1620 302-0103-00 y2 w R1622 302-0470-00 47 n y2 w 316-0220-00 R1624 22 a...
  • Page 218 Electrical Parts List— Type 55 6 Switches ( c o n t ) T ektronix S e ria l/M o d e l No. D escription Ckt. N o. Part N o. Disc SW625 260-0640-00 Lever A MODE SW660 W ired *262-0766-00 Rotary A TIME/CM SW660...
  • Page 219 Electrical Parts List— Type 556 Thermal Cut-Out T ektronix S e ria l/M o d e l No. Ckt. N o. Part N o. Disc Description TK404 260-0618-00 140° F ± 5 ° T ransformers *120-0437-00 Toroid, 2 windings T555...
  • Page 220 Electrical Parts List— Type 556 Electron Tubes fconfj T ektronix S e ria l/M o d e l No. Ckt. No. Part N o. Disc Description V I294 154-0146-00 6197 V I300 154-0494-00 6GF5 V I322 154-0051-00 5642 V I332...
  • Page 221 Mechanical Parts List— Type 556 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS (Located behind diagrams) F IG . 1 F R O N T & S W IT C H E S FIG . 2 A SW EEP, V E R T IC A L A M P LIFIE R & H IG H V O L T A G E F IG .
  • Page 222 Mounting hardware 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 department.
  • Page 223 Type 5 5 6 SECTION 8 MECHANICAL PARTS UST FIG. 1 FRONT & SWITCHES F ig . & T e k tr o n ix S e r ia l/ M o d e l N o . I n d e x D e s c rip tio n P a rt N o .
  • Page 224 Mechanical Parts List— Type 5 5 6 FIG. 1 FRONT & SWITCHES fconf) Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. N o. Disc 1-24 260-0574-01 SWITCH, push button— RESET...
  • Page 225 Mechanical Parts List— Type 556 FIG. 1 FRONT & SWITCHES fconfj Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part No. Disc 1-55 670-0434-00 ASSEMBLY, circuit board assembly includes: 388-0689-00 BOARD, circuit...
  • Page 226 Mechanical Parts List— Type 556 FIG. 1 FRONT & SWITCHES (confj Fig. & Index Tektronix S e ria l/M o d e l No. Description Part No. Disc 1-72 366-0220-00 2009 KNOB, charcoal— ASTIGMATISM 366-0360-00 2010 KNOB, charcoal— ASTIGMATISM knob includes:...
  • Page 227 Mechanical Parts List— Type 556 FIG. 1 FRONT & SWITCHES (cont) Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. N o. Disc 1-86 RESISTOR, variable mounting hardware: (not included w/resistor]...
  • Page 228 Mechanical Parts List— Type 556 FRONT & SWITCHES fconfj FIG. 1 Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part No. Disc -103 RESISTOR, variable resistor includes: 210-0438-00 NUT, hex., 1 -72 x 5 / 32 inch...
  • Page 229 Mechanical Parts List— Type 556 FIG. 1 FRONT & SWITCHES (coni) Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o . Part N o. Disc ________________________ 1 2 3 4 5...
  • Page 230 Mechanical Parts List— Type 5 5 6 (conf) FIG. 1 FRONT & SWITCHES Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part No. Disc 1 -1 3 4 ............RESISTOR, variable ............
  • Page 231 Mechanical Parts List— Type 556 FIG. 1 FRONT & SWITCHES fconfj Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. Disc 1-146 210-0255-00 LUG, solder, % inch -147 337-0852-00 GUARD, shielding, gasket, outside...
  • Page 232 Mechanical Parts List— Type 5 5 6 FIG. 2 A SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc ___________________ 441-0655-00 2009...
  • Page 233 Mechanical Parts List— Type 5 56 FIG. 2 A SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE ( c o n t ) Fig. & Index T ektronix S e ria l/M o d e l N o. Description Part No._________ Eff_____________ Disc______ y _________________________ N o.
  • Page 234 Mechanical Parts List— Type 556 fcon/j AMPLIFIER & HIGH VOLTAGE FIG. 2 A SWEEP, VERTICAL Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. N o. Disc 2-32 337-0005-00 SHIELD, socket, STS179...
  • Page 235 Mechanical Parts List— Type 55 6 FIG. 2 A SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE (conf) Index Tektronix S e ria l/M o d e l No. Description Part N o. Disc 2-48 386-1099-00 PLATE, CRT shield mounting hardware: (not included w /plate) 211-0008-00 SCREW, 4-40 x ’/4 inch, PHS...
  • Page 236 Mechanical Parts List— Type 5 5 6 AMPLIFIER & HIGH VOLTAGE fconfj FIG. 2 A SWEEP, VERTICAL Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc ______ 2-65...
  • Page 237 Mechanical Parts List— Type 556 FIG. 2 A SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE (cont) Fig. & Index Tektronix S e ria l/M o d e l N o. D escription N o. Part N o. Disc 2-87 TRANSFORMER mounting hardware: (not included w/transformer]...
  • Page 238 Mechanical Parts List— Type 556 FIG. 2 A SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE (confj Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. N o. Disc 1 2 3 4 5...
  • Page 239 Mechanical Parts List— Type 556 FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. ___ E f f ____________ Disc______ y...
  • Page 240 (cont) FIG. 3 B SWEEP VERTICAL AMPLIFIER a HIGH VOLTAGE Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part N o. E f f _____________________ D I S C __________ y...
  • Page 241 Mechanical Parts List— Type 5 56 (conf) FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 3-33 SOCKET, tube, 7 pin, w /ground lugs...
  • Page 242 Mechanical Parts List— Type 5 5 6 AMPLIFIER & HIGH VOLTAGE fcontj FIG. 3 B SWEEP VERTICAL Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part N o. Disc N o. CHASSIS, vertical amplifier "B"...
  • Page 243 Mechanical Parts List— Type 556 FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE (cont) Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 3-67 CAPACITOR mounting hardware: [not included w/capacitor)
  • Page 244 Mechanical Parts List— Type 556 FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE (conf) Fig. & Index T ektronix S e ria l/M o d e l N o. Description ___________________ N o. Part N o. Disc y_ _...
  • Page 245 Mechanical Parts List— Type 556 FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE (confj Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc______ y ________________________ 1 2 3 4 5...
  • Page 246 Mechanical Parts List— Type 556 FIG. 3 B SWEEP VERTICAL AMPLIFIER & HIGH VOLTAGE fconf) Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 5_______________________________________ 3-118 124-0147-00...
  • Page 247 Mechanical Parts List— Type 556 FIG. 4 CAPACITOR M O U N TIN G CHASSIS & TRANSFORMER Fig. & Index Tektronix S e ria l/M o d e l No. Description N o. Part N o. Disc 441-0654-00 CHASSIS, capacitor mounting...
  • Page 248 Mechanical Parts List— Type 556 FIG. 4 CAPACITOR M O U N TIN G CHASSIS & TRANSFORMER (contj Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc...
  • Page 249 Mechanical Parts List— Type 55 6 FIG. 5 POWER CHASSIS & PLUG-IN HOUSING Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 441-0657-00 2009 CHASSIS, power 441-0657-01 2010 CHASSIS, power chassis includes:...
  • Page 250 Mechanical Parts List— Type 5 5 6 (conf) FIG. 5 POWER CHASSIS & PLUG-IN HOUSING Fig. & Index T ektronix S e ria l/M o d e l N o. Part N o. Disc N o. LUG, solder, SE # 4 5-19 210-0201-00 mounting hardware for each: (not included w /lug)
  • Page 251 Mechanical Parts List— Type 5 56 fconf] FIG. 5 POWER CHASSIS & PLUG-IN HOUSING Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. Eff_____________ Disc 5-36 CONNECTOR, 16 contact 131-0018-00 mounting hardware for each: (not included w/connector) 211-0014-00...
  • Page 252 Mechanical Parts List— Type 5 5 6 FIG. 5 POWER CHASSIS & PLUG-IN HOUSING n t ) ig. & ndex Tektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 5_______________________________________ 5-55...
  • Page 253 Mechanical Parts List— Type 5 56 FIG. 6 FAN MOTOR & HEAT SINK CHASSIS Fig. & Index Tektronix S e ria l/M o d e l N o. Description N o. Part N o. Disc 1 2 3 4 5...
  • Page 254 M echanical Parts List— Type 5 5 6 FIG. 6 FAN MOTOR & HEAT SINK CHASSIS (conf) Fig. & Index Tektronix S e ria l/M o d e l N o. D escription N o. Part No. Eff_____________ Disc ....
  • Page 255 Mechanical Parts List— Type 556 FIG. 6 FAN MOTOR & HEAT SINK CHASSIS (confj Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. ________ Eff_____________ Disc______ y ________________________...
  • Page 256 Mechanical Parts List— Type 556 FIG. 7 CRT SHIELD & REAR Fig. & Index T ektronix S e ria l/M o d e l N o. Description N o. Part N o. E ff ________ Disc______ y SHIELD, cathode ray tube ’-1...
  • Page 257 Mechanical Parts List— Type 556 FIG. 7 CRT SHIELD & REAR [ c o n i ) Fig. & S e ria l/M o d e l No. Index Tektronix Description Part N o. Disc N o. __________________________ CONNECTOR, 3 wire motor base...
  • Page 258 Mechanical Parts List— Type 556 (contj FIG. CRT SHIELD & REAR Fig. & Index Tektronix S e ria l/M o d e l N o. Description 1 2 3 4 5 N o. Part N o. E ff Disc FILTER, air, foam...
  • Page 259 Mechanical Parts List— Type 55 6 FIG. 8 CABINET & RAILS Fig. & Index Tektronix S e ria l/M o d e l No. Description N o. Part No. Disc 386-1048-00 PLATE, cabinet, top mounting hardware: (not included w /plate) 212-0069-00 SCREW, 8-32 x ’/, inch, THS...
  • Page 260 £ > T V F E 5 5 6 o s c i l l o s c o p e...
  • Page 261 T O W ^R IZ O W T A L B L O C K D IA G R A M Q I7 5 ----- ► 'F F T O HO RIZO NTAL B L O C K D IA G R A M Q 4 6 3 ---------►...
  • Page 262 T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 263 UPPER B EAM D IS P L A Y M A G EXT HORIZ IN E X T E R N A L H O R I Z O N T A L -o*-o- A M P L I F I E R V I 1 0 4 IPPE.R B E A M IN B L A N K IN G...
  • Page 265 * TWO WIRE, 3HICL01D CARLE * * THREE. W IRE SUIELDED CARLE. M R H S 6 7 L E F T V E R T I C A L A M P L I F I E R <T> 5/ W 2000 - U P...
  • Page 266 T Y P E 5 5 6 O 5 C I L L O S C O P E...
  • Page 267 + 2Z5V ( D C P L )
  • Page 268 a d O D S O T T I O ^ O 9 S S 3 d A 1 A0S2 + AOSt +...
  • Page 269 + 225V (D C F L ) R I G H T V E R T I C A L A M P L I F I E R <£> 5 /N 2000 - UP...
  • Page 270 + 2 2 5 V S IG N A L T O TYPE. 5 5 6 O S C I L L O S C O P E...
  • Page 271 +225V (DCPL) R I G H T V E R T I C A L A M P L I S / U I O O - 1 9 9 9...
  • Page 272 - H O O V — I 5 0 V T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 273 - I 5 0 V + 6 V <S> A SWEEP GENERATOR <£> B SWEEP TRIGGER < 1 ^> HEATER WIRING <^> PLUG - IN JACK DETAILS E > T R I S W E E P...
  • Page 274 + I O 0 V + J O V + I O O V - I S O V - I S O V S & 6 O S C I L L O S C O P E t y p e...
  • Page 275 + 2 2 5 V R 5 8 3 IO O „ 5W "P > » " T 0 S W 1 6 5 SAW TOOTH V 9 0 4 - T O L O W E R BEAM SW 77S D E L A Y P I C K O r r A L T E R N A T E T R A C E L O G I C 4 B L A N K I N G...
  • Page 276 + IOOV — I50V + IO O V + IO V -150V T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 277 R568 TRACE B R IG H T E N IN G FMJL5E . • F R O M Q79 2 > < T > U P P E R B E A M D I S P L A Y E X T "...
  • Page 278 I------------------s -------------- II----------------- S -------------- II - W ( n - N t f i 5 o o ” W o r - r o u i o o ( 5 “ ^, * u ' " w u l...
  • Page 279 > £ "0 ■ H U > £ < (J1 >...
  • Page 280 -H O O V — f50V T Y P E 5 5 6 O S C I L L O S C O P E .
  • Page 281 <T> <$> L E F T V E R T I C A L A M P L I F I E R <$> < Z > R I G H T V E R T I C A L A M P L I F I E R <...
  • Page 282 T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 283 LOW ER B E A M A U N B L A N K IM G 2,R IC O N TgA V T X IK iT E N S >R85S M-O / /rnweo a tiu >20K R85<? HO-- W r * . D S S 9 TO B UNBLAUKlHG...
  • Page 284 + IOOV IS O V - I BO V +-IOOV +IO V T Y P E 5 5 6 O S C I L L O S C O P E !
  • Page 285 +225V SEE. P A R T S L IS T FO R S E M IC O N D U C T O R . T Y P E S 1266 S W E E . P G E N E R A T O R S / U i O O - 1 9 9 9...
  • Page 286 - f o u i - N O i ^ S g - f o u i - N i n ^ g g - N U i - i o u i ^ T T T T T T T T T T , £...
  • Page 287 ! £7 S W E E P T I M I N G S W I T C H...
  • Page 288 +225V TYPE: 5 5 6 & O S C I L L O S C O P E...
  • Page 289 + IOOV R 9 2 4 C924 I80K S1E PARTS LIST FO R SEMICONDUCTOR TYPES REFERENCE DIAGRAMS: <$> A SW EEP GENERATOR <7> B SW EEP G ENERATO R M R W P I C K O F F < >...
  • Page 290 R E F E R E N C E D IA G R A M S : < ^ > A S W E E P G E N E R A T O R B S W E E P G E N E R A T O R CRT CIRCUIT <^>...
  • Page 291 +»oov...
  • Page 292 SEE PARTS LIST TOR H50V SEMICONDUCTOR TYPES REFERENCE DIAGRAMS: <^> A SW EEP GENERATOR B SW EEP GENERATOR CRT CIRCUIT PLUG-IN JACK DETAILS < fe > T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 293 + IOOV...
  • Page 294 + IOOV RE.FE.gE.NCE. D IA G R A M S : < ^ > A S W ttP GtUEJ?ATOR < 7 > B 5WE.LP GE.NLRXTOR. HO RIZO NTAL D IS P L A Y 4 MOI T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 295 + IO OV...
  • Page 296 +IO O V A S W E E P F R O M R £ > S | R l 154 U P P E R BEAM EXT H O R IZ INI S EE PAR TS LIST F O R SEM ICONDUCTO R T Y P E S R E FE R E N C E DIAGRAMS: A SWEEP G EN ER ATO R...
  • Page 297 + IO O V...
  • Page 298 + IO O V + 10 O V A SWEEP <0> FROM R683 - B SWEEP FROM R8S2 -15 O V a . f T P A R T S l i s t f o r « . r M l C O N D U C T O R T Y P t - S O S C O P E 5 5 6...
  • Page 299 + IOOV S EE. P A R T S L IS T F O R S E M IC O N D U C T O R T Y P E S R E F E R E N C E D I A G R A M : e>...
  • Page 300 + 100V + IO O V BEE PARTS LIST F O R . SEMICONDUCTOR TYPES REFERENCE DIAGRAM: <7> B SW EEP GENERATOR & T Y P E O S C I L L O S C O P E 5 5 6...
  • Page 301 + IOOV £ Rl 244 >S>. Z K — C l 244 — ) ? 3 5 * ° ' TO LEFT H A N D D EFLEC TIO N P LA T E . T O RIG HT H A N D DEFLECT IO N P LA TE .
  • Page 302 + 3 5 0 V SELECTO R SELEC TO R T Y P E ! 5 5 6 o s c i l l o s c o p e...
  • Page 303 L O W E R B E A M UP P ER B E A M UN B LA N K IN G - U N B L A M K I N G F R O M V 7 6 3 B FRO M V 5 8 3 B L I 3 4 6 1 —...
  • Page 304 T1351 (Upper Beam) TRANSFORMER DETAILS T1301 (Lower Beam) TRANSFORMER DETAILS...
  • Page 305 +225V S E L E C T O R S E L E C T C T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 307 TI40I T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 308 + 3SO V P O W E R S U P P L Y 1067 S / N 2 0 0 0 - U P...
  • Page 309 T \4 0 i T Y P E 5 5 6 O S C I L L O S C O P E...
  • Page 311 V904 V1605 I €> D < J© 6M I i I ( TERMINAL'S) e > T Y P E , 5 5 6 O S C I L L O S C O P E...
  • Page 312 V 9 0 4 V I 6 0 5 S O J a <SM I I T I 4 0 I ( T E R M IN A LS ) REFERENCE. DIAGRAMS: < 3 > A S W E E P T R IG G E R . B S W E E P T R IG G E R P L U G - IN J A C K D E TA ILS M R H...
  • Page 313 F R O M P O W E .R <$> S U P P L Y PLUG - I K J JACK R E F E R E N C E D I A G R A M S : * L O C A T E D OKI L E F T V E R T IC A L C H A S S IS L E F T V E R T IC A L A M P L I F I E R ❖...
  • Page 314 F R O M P O W E R <8> S U P P L Y PLUG - IN JACK R E F E R E N C E - D I A G R A M S ? * L O C A T E D O N R IG H T V E R T IC A L C H A S S IS L E F T V E R T IC A L A M P L I F I E R R IG H T V E R T IC A L A M P L IF IE R A S W E E P T R IG G E R...
  • Page 315 + 100V +225V t y p e 5 5 6 O S C I L L O S C O P E...
  • Page 317 T Y P E . 5 5 6 O S C I L L O S C O P E ,...
  • Page 318 F R O M R I 4 - 0 , . <i> F R O M R 4 - 0 v 0 1 1 LE.FT P L U G -IN 0 1 2 R IG H T P LU G -IN H O R I Z O N T A L D I S P L A Y <$...
  • Page 319 FIG. 1 FRONT & SWIT...
  • Page 320 FIG. 1 FRONT & SWITCHES TYPE 5 5 6 OSCILLOSCOPE...
  • Page 321 FIG. 2 “ A " SWEEP, VERTICAL AMPI...
  • Page 322 SWEEP, VERTICAL AMPLIFIER & HIGH VOLTAGE TYPE 5 5 6 O S C ILL O S C O P E...
  • Page 323 FIG. 3 “ B” SWEEP, VERTICAL AMPLIFIER...
  • Page 324 ■ £ 9 — ® Y L y (99) ( 1 2 0 ) ( U 6 ) ) § TYPE 5 5 6 OSCILLOSCOPE...
  • Page 325 FIG. 4 CAPACITOR CHASSIS & TF...
  • Page 326 4 CAPACITOR CHASSIS & TRANSFORMER TYPE 5 5 6 OSCILLOSCOPE...
  • Page 327 FIG. 5 PLUG-IN HOUSINGS & P...
  • Page 328 TYPE 5 5 6 OSCILLOSCOPE...
  • Page 329 FIG. 6 FAN MOTOR & HEAT SlM...
  • Page 330 TYPE 556 OSCILLOSCOPE...
  • Page 331 FIG. CRT SHIELD & R...
  • Page 332 FIG. 7 CRT SHIELD & REAR TYPE 5 5 6 OSCILLOSCOPE...
  • Page 333 FIG. 8 CABINET & RAIL!
  • Page 334 FIG. 8 CABINET & RAILS TYPE 55 6 OSCILLOSCOPE...
  • Page 335 FIG. 9 STANDARD ACCESSORIES Fig. & T ektronix S e ria l/M o d e l N o. Index D escription Part N o. Disc N o. COVER, graticule 200-0382-00 FILTER, light, smokey grey 378-0567-00 PROBE, P6008, 10 MEG, 10X BNC 010-0129-00 COVER, BNC, non-shorting w /strap 016-0088-00...
  • Page 336 M A N U A L CHANGE INFORMATION A t T ektronix, we c o n tin u a lly strive to keep up w ith latest electronic developm ents by a d d in g circuit and com ponent im provements to our instruments as soon as they are developed and tested.
  • Page 337 TYPE 556 PARTS LIST CORRECTION CHANGE TO: 321 - 0245-00 3.48 1/8 W R 559 Prec 13 S R561 315-0560-00 1/4 W 323-0326-00 24.3 kG 1/2 W Prec R 563 3.48 k£ 321-02^5-00 1/8 w Prec 1$. R 759 R761...
  • Page 338 TYPE 556 TENT SN 2090 TYPE R556 TENT SN 1050 PARTS LIST CORRECTION CHANGE TO: 15-01 R1319 R1336 0121-01 15-01 R1369 0121-01 Mil,639/1067...
  • Page 339 TYPE 556 /R 556 PARTS LIST CORRECTION CHANGE TO: 119 - 0135-03 FLl*tOO AD D : Cl*fOO 285-0672-00 .1 vF 600 V SCHEMATIC CORRECTION PARTIAL POWER SUPPLY M 12 , 980/967...
  • Page 340 Page 1 of 3 TYPE 556 PARTS LIST AND SCHEMATIC CORRECTION ADD: c 66 i 281-0524-00 150 pF 500 V C861 281-052^-00 150 pF 500 v R665 1/4 w 315-0271-00 R67L 1/4 w 315-0272-00 2 .7 4 R865 1/4 w...
  • Page 341 TYPE Pa^e 2 of 3 R674- D6TT Z. 7 K ♦ - A M — - 0 1 - PARTIAL S SWEEP JENERATOR R847< R.84& C84S m 3 ,2 5 2 /1 1 6 7...
  • Page 342 Pa^e 3 o f 3 TYPE 556 6 T 1 M E / C M S F ^ P . -f> R3<2>5 C 8 fo l 2 7 0 1 1 ■ A V v ------------ J l— o - o — 4 o...
  • Page 343 T Y P E 5 5 6 T E N T S N 2 2 7 0 P a g e 1 o f 2 P A R TS L I S T C O R R E C T IO N A D D : 0000-00 0.001...
  • Page 344 TYPE 556 T E N T S N 2 2 7 0 P a g e 2 o f 2 SCHEMATIC CORRECTION UPPER BEAM HORIZONTAL AMPLIFIER ADD: R1101 as shown below: U P P E R B E A M...
  • Page 345 K4XL's BAMA This manual is provided FREE OF CHARGE from the “BoatAnchor Manual Archive” as a service to the Boatanchor community. It was uploaded by someone who wanted to help you repair and maintain your equipment. If you paid anyone other than BAMA for this manual, you paid someone who is making a profit from the free labor of others without asking their permission.