Tektronix 606B Service Manual Download

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Summary of Contents for 606B

Page 1: ...SERVICE MANUAL Tektronix Inc P O Box 500 Beaverton Oregon 97077 MANUAL PART NO 070 2821 00 First Printing SEP 1979 Revised JAN 1981...

Page 2: ...ation in a residential area is likely to cause interference in which case the users at their own expense must 1 take whatever measures may be required to correct the interference h Copyright 1979 Tekt...

Page 3: ...1 3 p c 1 C V v t4 5 S s lc 5 s 1 5 1 5 1 5 1 A V2W 2 1 2 1 2 r 2rl V v 2 4W iM 2 4 STIGMATOR 1 OUTPUT AMPLIFIER AND LEVEL SHIFTER REMOTE DEFOCUS STIGMATOR 2 CORRECTION SHAPER AND MIXER STIGMATOR 2 O...

Page 4: ...0 B CRT 5 33 C HORIZONTAL X AMPLIFIER 5 35 D VERTICAL Y AMPLIFIER 5 41 E Z AXIS AMPLIFIER 5 47 F DYNAMIC FOCUS 5 51 SECTION 6 INSTRUMENT OPTIONS SECTION 5 CALIBRATION MO USING THESE PROCEDURES 5 2 PER...

Page 5: ...X Y Preamplifier circuit board assembly 4 6 A2 X Y Pre Amplifier board removal 7 4 11 8 7 A3 Low Voltage Power Z Akiis circuit board assembly 4 7 A3 Low Voltage Power and Z Axis board 8 8 A6 Dynamic F...

Page 6: ...ds the marking IN THIS MANUAL Static Sensitive Devices own AThis symbol indicates where applicable cautionary or other information is to be found AS MARKED ON EQUIPMENT DANGER High voltage Protective...

Page 7: ...or adjustment of this prodppt unless another person capable of rendering first aid and resuscitation is present USE CARE WHEN SERVICING WITH POWER OiSi f s Dangerous voltages exist at several points...

Page 8: ...signed for display applications as in ultrasonic detection systems electronic microscope systems radiation and thermal scanning systems speech therapy volume and vibration analysis and medical and bio...

Page 9: ...environmental characteristics standard and recommended accessories installation and packaging for shipment instructions e tign Replaceable Electrical Parts contains information necessary tp order rep...

Page 10: ...minal line voltage source CAUTION To prevent damage to the instrument always check the line voltage information recorded on the rear pane before applying power to the instrument Power Cord Information...

Page 11: ...ting screw to the appropriate hole in the line voltage information chart on the 606 B rear panel 5 Apply power to the Monitor INSTALLATION IN PATIENT CARE FACILITIES o Do not use the amplifier INPUTS...

Page 12: ...FUSE Regulating Range Data Line Voltage Selector Position 110 Volts Nomina 220 Volts Nominal M MED H HIGH 90 to 1 1 0 V ac 99 to 121 V ac 108 to 132 V ac 180 to 220 V ac 198 to 242 V ac 216 to 250 V a...

Page 13: ...l CABINET TO RACKMOUNT CONVERSION j INSTRUMENT PACKAGING v Ti f V If thg instrument is to be shipped to a Tektronix Service Center for service or repair attach a tag showing the following Owner with a...

Page 14: ...LATCHES AND PUSH INSTRUMENT TOWARD RACK UNTILTHE LATCHES SNAP INTO THEIR HOLES 4 AGAIN PRESS STOP LATCHES AND PUSH INSTRUMENT INTO RACK 5 SECURE THE INSTRUMENT IN PLACE WITH THE FRONT PANEL SECURING...

Page 15: ...o at least 1 2 5 volts full screen Polarity X INPUT Positive signal applied deflects beam to the right negative signal applied deflects beam to the left X INPUT Positive signal applied deflects beam t...

Page 16: ...Less than 0 2 cm drift from 0 to 50 C ambient temperature variation after 20 min warmup Gain Stability Less than 1 change under all conditions of line voltage cand temperature Crosstalk Between X and...

Page 17: ...V to 0 8 V Rise Time 35 ns or less Fall Time 35 ns or less Stability Light output varies less than 5 under all conditions of line voltage and temperature when intensity is set for at least 10 of maxim...

Page 18: ...WIDTH The maximum linear dimension perpendicular to the length Quality Area 1 Any number of defects less than 5 mils in both width and length 2 No defects with length plus width exceeding 20 mils exc...

Page 19: ...haracteristics Characteristic Information Ventilation Convection cooling Position Instrument has to be positioned with the bottom or the regr panel down within 45 degrees Temperature ambient Operating...

Page 20: ...1 procedure IV modified and specified in MIL T 28800B Par 4 5 51 1 2 Operating 50 C 90 to 95 R H Nonoperating 60 C 90 to 95 R H TABLE 1 5 Physical Characteristics Characteristic Information Weight App...

Page 21: ...General Information 6068 NOTE TOP NUMBERS IN INCHES BOTTOM NUMBERS IN CENTIMETERS...

Page 22: ...ven in Figure 2 2 DETAILED OPERATING INFORMATION SIGNAL CONNECTORS The bnc connectors on the rear panel of the standard 606B Monitor are provided for application of input signals to the vertical Y and...

Page 23: ...uminates when instrument is on ON OFF Controls power to the monitor Insrument is on when pushbutton is in TRACE ALIGN Provides slight beam rotation for alignment in the X axis X GAIN Provides 10 adjus...

Page 24: ...nector with grounding cap A positive signal applied deflects beam down a negative signal deflects beam up Z INPUT bnc input connector A positive signal applied provides a linear function to increasedi...

Page 25: ...erefore a minimum amount of test equipment is required If performing the Checkout Procedure reveals improper performance or instrument malfunction check the operation of associated equipment then refe...

Page 26: ...erminator 7 Place the grounding cap on the X INPUT connector 8 Center the display with the horizontal Position control 9 Check for 8 divisions of horizontal deflection 10 Disconnect the signal from th...

Page 27: ...flected from the crt center Thus by varying the voltage to the crt gun elements the Dynamic Focus circuit compensates for geometric defocusing The High Voltage and Low Voltage Power Supplies provide a...

Page 28: ...Theory of Operation 606B 3 2 REV A MAY 1980...

Page 29: ...d from the X Preamplifier to the X Absolute Value Amplifier diagram 4 for focus correction in the X axis A sampling of the X voltage signal is converted to a current signal by Q170 and the X voltage s...

Page 30: ...drive signals to protect the field effect transistors from excessive input voltages The Y Gain adjust R229 allows settling the 8 cm deflection from 0 5 volts to at least 2 5 volts 12 5 volts with atte...

Page 31: ...the negative going overdrive signals to protect the field effect transistors from excessive input voltages Front panel control R46 provides intensity control by differentially altering the bias voltag...

Page 32: ...age remains the same As a result the display is defocused appearing larger at the edge of the screen than at crt center see Figure 3 2 The Dynamic Focus circuit varies the voltages to the focus and st...

Page 33: ...340 Q350 Q360 The feedback network consists of R373 C373 C374 with C373 and C374 supplying high frequency compensation The input signal is applied to the bases of emitter followers Q310 Q320 and fed t...

Page 34: ...current necessary to drive the capacitive load 5 CONVERTER AND HIGH VOLTAGE POWER SUPPLY The Converter and High Voltage Power Supply provides the voltage levels and control circuits necessary for ope...

Page 35: ...ed on the schematic 250 Volts The ac voltage from pins 22 and 1 6 of T200 is rectified by CR201 CR202 filtered by L201 CL201 and fed to the circuit locations indicated on the schematic 300 Volts The a...

Page 36: ...es through C215 R215 and R220 to a voltage level determined by the output level from the Focus Output Amplifier stage of the Dynamic Focus circuit diagram 4 At this voltage level approximately 15 volt...

Page 37: ...the supply due to ripple change of current through the load etc is immediately transmitted to the base of Q350 and cancelled by a change in Q350 conduction maintaining a steady output The output of t...

Page 38: ...aner consult your Tektronix Service Center EXTERIOR Loose dust accumulated on the outside of the instrument can be removed with a soft cloth or small brush The brush is particularly useful for dislodg...

Page 39: ...may cause the indicated malfunction The stage names given in shaded blocks correspond directly to the names given in the functional stage blocks of the schematic diagrams The circuits are discussed in...

Page 40: ...0 POSITIVE POLARITY AND VOLTAGE RATING METAL FILM RESISTORS COMPOSITION RESISTORS SMALL DISC CAPACITORS CERAMIC CAPACITORS DIPPED TANTALUM ELECTROLYTICS RESISTORS CAPACITORS DIPPED mi OR SIGNIFICANT...

Page 41: ...CASE TRANSISTOR METAL CASE TRANSISTOR POWER TRANSISTORS 14 PIN INDEX METAL HEAT SINK o cs o INDEX 1 1 POWER TRANSISTOR L DUAL METAL J CASE FET INTEGRATED CIRCUIT INDEX configuration may vary from one...

Page 42: ...t When the defective component is located replace it using the replacement procedure given under Component Replacement in this section 1 CHECK CONTROL SETTINGS Incorrect control settings can indicate...

Page 43: ...The shaded blocks of the Troubleshooting Chart indicate circuit stages that may cause the malfunction and correspond directly to the functional blocks on the schematic diagrams The circuits listed ar...

Page 44: ...as had any electrical components replaced Adjustment of the circuit may be necessary Corrective maintenance consists of component replacement and instrument repair Special techniques required to repla...

Page 45: ...inserted components easier straighten the leads of the component on the back of the circuit board using a small screwdriver or pliers while heating the soldered connection 4 Bend the leads of the rep...

Page 46: ...ront panel with the 2 bezel securing screws NOTE Align the extender shafts with the appropriate holes in bezel 7 Press the crt front support toward the rear of the crt The corner supports will fall aw...

Page 47: ...ot shipped as part of the board assembly 4 Unplug the 2 pin Harmonica P290 and 4 individual pins connected to the crt deflection plates 5 Position the instrument on its right side 6 Remove 8 Transisto...

Page 48: ...the X Y Pre Amplifier board 2 Then remove the X Y Output Amplifier board as previously described however do not unsolder the 8 transistors in step 3 Next proceed with the following instructions 3 Unpl...

Page 49: ...e board near the interboard connectors 2 while guiding the two heat sinks from their slots See step 3 10 Remove the board 1 1 To install the board reverse the removal procedure A4 Converter Board Remo...

Page 50: ...2 PIN SPRING INSULATING CLIPS 2 CHIPS 2 REMOVE SCREWS REMOVE SCREWS V A4 CONVERTER BOARD INTERBOARD CONNECTOR Figure 4 8 A4 Converter board remova INTERBOARD 01 fji CONNECTOR CAPACITOR Figure 4 9 A5 H...

Page 51: ...r the Interboard Connector Remove the board 6 Remove the plastic Lexan shield from the board 7 To install the board reverse the removal procedure A6 Dynamic Focus Board Remove the Dynamic Focus board...

Page 52: ...rs press the replacement pin with attached spare ferrule into the hole Position the replacement pin in the same manner as the original pin had been Solder the pin to the circuit board on each side of...

Page 53: ...I and Part II are written so that the entire instrument or any major circuit or part of a circuit can be checked or adjusted Table 5 1 Calibration Procedure Electives lists the choices available and...

Page 54: ...ment is necessary If no ADJUST instruction appears in the same step the EXAMINE instruction concerns measurement limits that do not have a related adjustment Measurement limits following the word EXAM...

Page 55: ...Geometry R185 Orthogonality 90 within 0 7 B2 Check Orthogonality B3 Check Orthogonality Compression and Expansion Less than 1 of full screen deflection Does not normally require customer verification...

Page 56: ...3 MHz at 3 dB point C4 Check Horizontal Bandwidth C6 Check Horizontal Bandwidth Settling Time C3 Check Horizontal Settling Time C5 Check Horizontal Settling Time After deflection between any 2 points...

Page 57: ...y Less than 1 change under all conditions of line voltage and temp erature Crosstalk Between X and Y Amplifiers 0 005 cm 0 002 inch or less of deflection on the undriven channel with full screen ampli...

Page 58: ...700 ns Phase Difference Dc to 500 kHz 1 or less between X and Y amplifiers D7 Check Phasing D8 Check Phasing Risetime 116 nsec or less Does not normally require customer verification However risetime...

Page 59: ...wave applied to the other channel Other i inputs grounded or terminated into 50 O From Z to Y Amplifier 0 012 cm 0 005 inch or less of deflection on the undriven channels when the Z Axis Amplifier is...

Page 60: ...o maintain instrument accuracy check peformance every 1000 hours of operation or every 6 months if used infrequently Before complete adjustment thoroughly clean and inspect this instrument as outlined...

Page 61: ...tput DC Level Adjust bias R306 dynamic focus Crt grid bias R245 Check spot diameter a TEKTRONIX DM 501A Option 02 Digital Multi Meter operates in TM 500 series power module b TEKTRONIX 7D13 Digital Mu...

Page 62: ...rate inputs A B Measure ment of ratio of A_ B averaged over 10 s cycles of B AC coupling Check spot diameter a TEKTRONIX DC 503 Universal Counter operates in TM 500 series power module 9 Test Oscillos...

Page 63: ...3 8 inches Adjust variable capaci tors and internal variable resistors a TEKTRONIX part 003 0675 01 18 Screwdriver insulated with metal tip 7 32 inch bit Adjust internal variable resistors a TEKTRONI...

Page 64: ...eck Vertical Bandwidth 5 20 5 Check Vertical Input Attenuation 5 21 6 Check Vertical Y Common Mode Rejection IX 5X Atten 5 21 7 Check Phasing 5 22 E Z AXIS AMPLIFIER 5 23 1 Z Axis Amplifier Preliminar...

Page 65: ...Calibration Part I 606B Performance Check A POWER SUPPLIES There are no performance checks for the Power Supplies 5 13...

Page 66: ...the graticule within 0 1 division c See TEST POINT AND ADJUSTMENT LOCATIONS and Internal control and selector locations foidout pages in Section 8 Diagrams and Circuit Board Illustrations B3 CHECK GE...

Page 67: ...hich may affect this procedure c See TEST POINT AND ADJUSTMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foidout pages in Section 8 Diagrams and Circuit Board Illustrations d Set 606B Cont...

Page 68: ...the crt a Slowly increase the Sine Wave Generator output b CHECK that the time required for the leading edge frequency until the display amplitude is 5 6 divisions of the square wave to travel from th...

Page 69: ...IONS bnc Cables Test Equipment Controls Ramp Generator Duration Triggering Amplitude Function Generator Function Frequency Amplitude 10 ms AUTO Ext set for 8 div deflection Sine wave 500 kHz 3 V p p 2...

Page 70: ...ease the Function Generator output to 15 volts p p k CHECK For 0 6 division or less of free running horizontal display on the 606B position as necessary l Turn off the 606B POWER Return SI 00 X Atten...

Page 71: ...OINT AND ADJUSTMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foldout pages in Section 8 Diagrams and Circuit Board Illustrations d Set 606B controls INTENSITY Visible display Vertical and...

Page 72: ...ipment Controls Ramp Generator Ramp Signal Triggering Amplitude Sine Wave Generator Frequency Amplitude 10 msec r AUTO Set for 10 div deflection 50 kHz 0 8V p p 2821 40 2821 81 a Rotate the Var Period...

Page 73: ...10 div deflection Function Generator Function Sine wave Frequency 500 kHz Amplitude 3 V p p 2821 421 2821 83 a Set the and Atten switches S200 S205 in the 5X position back Turn on the 606B POWER a Mo...

Page 74: ...TTEN to the IX forward position Turn on the 606B POWER D7 CHECK PHASING NOTE If the preceding step was not performed first perform step D7 then proceed r D7 SETUP CONDITIONS 606B Controls Make no chan...

Page 75: ...c See TEST POINT AND ADJUSTMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foidout pages in Section 8 Diagrams and Circuit Board illustrations d Set 606B controls INTENSITY Visible display...

Page 76: ...the Sine Wave Generator Amplitude for a 7 division 70 V display on the test Oscilloscope Make sure no clipping occurs on the test Oscilloscope display E4 CHECK Z AXIS COMMON MODE REJECTION NOTE If th...

Page 77: ...ff the 606B Move PI 76 and P179 to the LO position d CHECK That only the positive portion of the square wave is displayed e Turn off the 606B POWER Move the jumpers PI 76 PI 79 to the position f CHECK...

Page 78: ...T LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foldout pages in Section 8 Diagrams and Circuit Board illustrations d Set 606B controls INTENSITY Visible display Vertical and Horizontal Positi...

Page 79: ...t the DVM Do not move the INTENSITY control c Using the Level control of Ramp Generator A provide a synchronized raster d While viewing the raster with a 24X magnifier rotatethe duration multiplier Ra...

Page 80: ...st Geometry R185 5 34 C HORIZONTAL X AMPLIFIER 5 35 1 Horizontal X Amplifier Preliminary Setup 5 35 2 Adjust X Output Dc Level 5 35 3 Adjust X Amplifier Gain R104 R109 R129 And Check Positioning 5 36...

Page 81: ...e line voltage and range See Fig 1 1 of Section 1 General Information 3 Check the rear panel to determine which options have been installed in your Monitor 4 Check that grounding caps are on the INPUT...

Page 82: ...TMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foldout pages in Section 8 Diagrams and Circuit Board illustrations d Set 606B controls INTENSITY fully counter clockwise Vertical and Horiz...

Page 83: ...606B Monitor Test Equipment Controls DVM Digital Voltmeter Range Function kV dc Variable Ac Power Supply Output Voltage 90 V ac 2821 52 a Disconnect the 606B from the power source and Connect the 90...

Page 84: ...B POWER e EXAMINE For a voltage reading between 5350 and 5450 f ADJUST R295 FIV Adj for a voltage reading of approximately 5400 volts g EXAMINE For no movement of the 5400 V Supply when the INTENSITY...

Page 85: ...TY Visible display Vertical and Horizontal Position Midrange FOCUS Well defined display a Position the sharply focused dot display near graticule center b Rotate the INTENSITY control counter clockwis...

Page 86: ...to the left edge of the graticule and then to the right edge b CHECK the vertical trace for 0 1 division or less of bowing at the left and right edges of the graticule c ADJUST R185 Geometry for mini...

Page 87: ...AND ADJUSTMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foldout pages in Section 8 Diagrams and Circuit Board illustrations d Set 606B Controls C2 ADJUST X OUTPUT DC LEVEL NOTE Perform s...

Page 88: ...selecting jumpers P101 P105 are in the 50 Q position a Assure that attenuator switches S100 S105 are in the IX position and grounding caps are on all unused INPUTS b Position the display near horizont...

Page 89: ...djust so that the corner and the area just after the corner is flat d Remove the square wave from the X INPUT and apply it to the X INPUT Install the grounding cap on the unused input Center the displ...

Page 90: ...the amplitude to provide 10 cm of horizontal deflection d CHECK That the time required for the leading edge of the square wave to travel from the zero percent level to the 100 percent level see Fig 5...

Page 91: ...Disconnect the Calibration Generator from the test Oscilloscope vertical input and connect it Calibration Generator High Ampl Output through the dual input coupler to the X INPUT connector on the 606B...

Page 92: ...p p sinewave as indicated on the test Oscilloscope e Disconnect the sine wave signal from the test Oscilloscope and connect it using the dual input coupler to both the X and X INPUT connectors on the...

Page 93: ...f this manual for any modifications which may affect this procedure c See TEST PO NT AND ADJUSTMENT LOCABONS and INTERNAL CONTROL AND SELECTOR LOCATIONS foidout pages in Section 8 Diagrams and Circuit...

Page 94: ...poor off screen recovery and degradation of settling time performance e ADJUST Y GAIN R204 front panel for a crt display of exactly 4 cm of deflection f Disconnect the Calibration Generator from the...

Page 95: ...06 HF Comp 1 for the bottom corner until both positive and negative going waveforms are optimum 04 SETUP CONDITIONS 606B Controls Make no changes to the control settings bnc Cables Test Equipment Cont...

Page 96: ...3 MHz D6 ADJUST VERTICAL Y ATTENUATOR COMPENSATION 203 C207 AND CHECK VERTICAL INPUT ATTENUATION NOTE If the preceding step was not performed first perform step D1 then proceed Before performing the f...

Page 97: ...nstall the grounding cap on the Y INPUT j Center the display k ADJUST C207 Y Atten Comp for optimum square corner D7 CHECK VERTICAL Y COMMON MODE REJECTION IX 5X ATTEN NOTE If the preceding step was n...

Page 98: ...N and S105 Y ATTEN to the IX forward position Turn on the 606B POWER D8 CHECK PHASING NOTE if the preceding step was not performed first perform step D1 then proceed D8 SETUP CONDITIONS 6068 Controls...

Page 99: ...e square wave displayed on the test Oscilloscope is 70 volts higher than the cutoff level noted in step e h Check the 606B for a fully brightened trace E3 SETUP CONDITIONS 6068 Controls Make no change...

Page 100: ...or V Test Equipment Controls Function Generator Function Frequency Amplitude Test Oscilloscope Deflection Factor Input Coupling Triggering Sweep Rate Sme wave 1 MHz 5 V p p 1 V div AC Internal 1 ms 28...

Page 101: ...urn off the 606B Move PI 76 and PI 79 to the LO position d CHECK That only the positive portion of the square wave is displayed e Turn off the 606B POWER Move the jumpers PI 76 PI 79 to the position f...

Page 102: ...ons and the Change Information at the rear of this manual for any modifications which may affect this procedure c See TEST POINT AND ADJUSTMENT LOCATIONS and INTERNAL CONTROL AND SELECTOR LOCATIONS fo...

Page 103: ...High Voltage board for smallest center dot j Set the FOCUS R76 front panel fully counter clockwise k ADJUST R385 Center Stig 1 and R295 Center Stig 2 for roundest center dot l Locate the Stigmator 2...

Page 104: ...dot tt Turn off the 606B POWER and move P398 Defocus jumper to position B S CAUTION i Always turn off the 606B POWER before turning off the Dot Generator The INTENSITY control may be set to a level t...

Page 105: ...JUST R425 top focus for roundest dot z Move the dot to the bottom center edge of screen aa ADJUST R435 bottom focus for roundest dot bb Turn off the 606B POWER and move P398 Defocus jumper to position...

Page 106: ...while displaying a 700 line 7 9 cm raster Rotate the INTENSITY until a reading of 3 5 pW cm2 is read on the photometer b Disconnect the DVM Do not move the INTENSITY control c Using the Level control...

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Tektronix 606B, Service Manual

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