Tektronix 221 Instruction Manual Download Page 66

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R662

■1000V

R739

C735

R661

R663

C733

,2V

C731

C617

-5V

C734

C732

P733

P633

Q648

g CR654

C632

| Q646 1 C647

CRS33

T633

CR626

R623

C623

L626

S TP

cc 5V

Q 666

T701

□644 0642

R626

Q626

0622

C662

0660

Q662

rDfibo

CR624

R665

R664

R666

R669

Q664

C644

Q668

C656

C657

U654

C663

R657

R656

ID $
S a

P-

C712

CR712

C666

0640 |

CR634

L632

R633 C633

R632

R634 Q 634

R636

CR625

T623

F630

P632

VR634

C634

CU CR622

CD CO

o cc

CRS21

« IE is

I-

T—

CD eg CD

cc cc

« c

CJ O o

C615

R735

VR738

C713 CR715

R734

C715

CR713

C739

C714

L713

CR716

L716

C736

C737

R732

R733

C613

R614

C614

R613

17 18

20 21 22 23 24

L610

F610

On back o f board:

R624

V R 625

R627

V R 626

FIG . 9-6. A 4 —Power supply c irc u it board (above) SNB020475

REV C, DEC. 1974

Summary of Contents for 221

Page 1: ...TEKTRONIX OSCILLOSCOPE SERVICE INSTRUCTION MANUAL Tektronix Inc P O Box 500 Beaverton Oregon 97005 070 1573 01 ...

Page 2: ...the fastest possible service Please include the instrument Type Number or Part Number and Serial Number with all requests for parts or service Specifications and price c Copyright 1973 new material 1974 by Tektronix Inc Beaverton Oregon Printed in the United States of America All rights reserved Contents of this publication may not be reproduced in any form without permission of Tektronix Inc U S ...

Page 3: ...ENANCE Diagrams 6 1 Troubleshooting Equipment 6 1 Disassembly 3 1 Component Color Coding 6 2 Cleaning 3 1 Isolating Trouble To A Circuit 6 2 Visual Inspection 3 2 Semiconductor Checks 3 2 Recalibration 3 3 SECTION 7 CORRECTIVE MAINTENANCE Obtaining Replacement Parts 7 1 SECTION 4 CIRCUIT DESCRIPTION Component Replacement 7 1 Recalibration After Repair 7 2 BLOCK DIAGRAM 4 1 Instrument Repackaging 7...

Page 4: ...Fig 1 1 The Tektronix 221 Oscilloscope 221 Service http manoman sqhill com ...

Page 5: ...r an ambient temperature range of 15 C to 55 C 5 F to 131 F when battery operated or 0 C to 40 C 32 F to 104 F when the instrument is connected to ac line voltage Warmup time for given accuracies is five minutes ELECTRICAL The 221 oscilloscope will meet the following electrical specifications after calibration The check portion of the calibration procedure provides a convenient method of checking ...

Page 6: ...k line non illuminated Area Six vertical divisions by 10 horizontal divisions Phosphor P31 Standard Power Line Voltage Operation Line Voltage Range 90 V to 250 V ac 80 V to 250 V dc Line Frequency Range 48 to 62 Hertz Maximum Power Five watts Line Fuse 0 2 A 250 V Common Isolation Line Operation Line voltage plus floating voltage not greater than 250 volts RMS sine wave or 1 4 times line voltage d...

Page 7: ...ck operating and non operating Tested with two shocks at 100 g one half sine two millisecond duration each direction along three major axes Weight without accessories 3 5 pounds 1 5 kilograms Altitude Operating to 25 000 feet maximum operating tem perature decreased by 1 C per 1 000 feet shown above 15 000 feet Dimensions measured at maximum points Height 3 0 inches 7 6 centimeters Width 5 25 inch...

Page 8: ...c components of input signal Low frequency lim it 3 dB point is about two hertz GND Input circuit is grounded The applied signal is connected to ground through a large resistor to provide a precharge path for the AC input coupling capacitor DC All components of the input signal are passed to the vertical amplifier system SEC DIV selects the sweep rate VAR SEC DIV must be in the CAL detent HORIZ MA...

Page 9: ...negative going slope When the LEVEL SLOPE control is set to the AUTO PRESET detent the sweep is automatically triggered at a preset level on the positive going slope AUTO PRESET screwdriver adjustment to set the PRESET trigger point for AUTO sweep operation EXT INT selects the source of the trigger signal INTENSITY controls brightness of crt display detent turns OFF instrument power FOCUS screwdri...

Page 10: ...he instrument side panel Cleaning The 221 should be cleaned as often as operating conditions require Accumulation of dirt in the instrument can cause component breakdown The high impact plastic covers provide protection against dust in the interior of the instrument Loose dust accu mulated on these covers can be removed with a soft cloth or small brush The brush is also useful for dislodging dirt ...

Page 11: ...tion in the instrument If checking the performance of a semiconductor out of the instrument is desired a dynamic checker such as the Tektronix Type 577 Curve Tracer system is recommended Lead configurations of the semiconductors used in the 221 are shown in Fig 3 2 An extracting tool should be used to remove the eight pin flat integrated circuit to prevent damage to the pins If an extracting tool ...

Page 12: ...00 hours of operation or every six months if used infrequently In addition replace ment of components may necessitate recalibration of the affected circuits The Calibration procedure can also be helpful in localizing certain troubles in the instrument In some cases minor troubles may be revealed or corrected by recalibration 3 3 manom ...

Page 13: ...ators the Preamplifier and the Output Amplifier A block diagram of the Vertical Amplifier is shown in Fig 4 1 Schematics of the Vertical Amplifier are shown on diagrams 1 and 3 The input signals are applied to a 800 kilohm im pedance in the probe and a 200 kilohm attenuator network which provides the 1 megohm impedance for the oscilloscope The output of the attenuator isapplied to the input of the...

Page 14: ...follower Q456 The output signal from the differential amplifier collector Q442A is applied to the input of the operational amplifier base Q452 Feedback resistor R456 receives a common output signal from the collector of Q452 and the emitter of Q456 Under fast positive output signal conditions the deflection plate is driven through the emitter follower Q456 Under fast negative signal conditions the...

Page 15: ...is also provided so external signals can be applied to the Horizontal Amplifier circuit to produce horizontal deflec tion for the crt The block diagram of the Trigger Sweep circuit is shown in Fig 4 2 The schematic of the circuit is shown on diagram 2 The Trigger Source Follower Q232A Q232B receives and buffers all incoming trigger signals and couples them to the base of Q234 one half of a differe...

Page 16: ...eep runs down Q324 becomes turned off by the current through CR328 and R328 When Q324 turns off Q322 turns on Transistor Q328 also turns on and supplies retrace current through R333 The sweep runs back up until Q330 turns on and sets the sweep start voltage The retrace current from the collector of Q330 then discharges the sweep start hold off capacitors When transistor Q316 turns on and Q312 off ...

Page 17: ...the XI and X10 mode In the XI mode Q518 is turned on and shorts R511 In the XI0 mode Q518 is turned off adding R511 to the feedback resistance Horizontal Position control R518 applies an offset current to the input of the operational amplifier for the required dc positioning Current output from the collector of Q526 which is proportional to the output signal is applied through the diode limiter CR...

Page 18: ...ply is shown on Fig 4 4 The schematic of the Power Supply is shown on diagram 4 When the instrument is connected to a power source C612 R612 C613 R613 R614 L610 and C614 function as a RFI filter to minimize RFI interference The line voltage is rectified by diode bridge CR612 CR613 and CR615 which supplies the dc voltage for the Line Inverter circuit Transistors Q622 and Q626 convert the dc voltage...

Page 19: ...ery supply When the battery voltage becomes lowerthan 10 3 volts Q640and Q646are turned off which turns off the entire power supply This action prevents the complete discharge of the batteries whenever the battery charge becomes low Operational amplifier U654 is connected as a buffer amplifier providing a ground reference at the mid point of the 10 volt supply creating the 5 volt and the 5 volt su...

Page 20: ...ol voltage The 1000 volt supply is also returned to the Secondary Inverter stage and serves as areference for the regulating circuit Deflection plate blanking is used for controlling the crt beam When an unblanking signal is received Q754 turns on and forward biases CR756 which lowers the deflection blanking voltage to approximately 40 volts which allows the electron beam to pass to the crt screen...

Page 21: ...Calibration Fixtures are used in this procedure only where they facilitate instrument calibration These calibration fixtures are available from Tektronix Inc Order by part number through your local Tektronix Field Office or representative Table 5 1 TEST EQUIPMENT REQUIRED Description Minimum Specifications Usage Examples of Applicable Test Equipment 1 Constant Amplitude Signal Generator 50 kHz ref...

Page 22: ...3 0030 00 14 Screwdriver Three inch shaft 3 32 inch bit Used throughout procedure to adjust variable resistors Xcelite R 3323 15 Low Capacitance Screwdriver 3 4 inch shaft 5 64 inch bit Used to adjust variable capacitors T e k tro n ix Part Number 003 0675 00 J F D Adjustm ent Tool 5284 PRELIMINARY PROCEDURE 4 See the Adjustment Locations in the pullout pages This instrument should be calibrated a...

Page 23: ...l Gain 5 8 15 Check Adjust Vertical Step Response 5 9 16 Check Adjust Vertical Bandwidth 5 9 17 Check Vertical Position Range 5 9 18 Check Input Noise 5 9 19 Check Gate Leakage 5 10 20 Check AC Coupling 5 10 Sweep Trigger 21 Check Trigger Slope 5 11 22 Check Adjust Auto Preset Triggering 5 11 Horizontal System Vertical System 10 Check Adjust Step Attenuation 5 7 Balance 11 Check Adjust VOLTS DIV V...

Page 24: ...eck the 5 volt supply for 5 volts 50 mV 2 Check Adjust High voltage Supply a Connect the digital voltmeter to the 1 kV test point b Check for a reading of 1000 volts c Adjust the High Voltage adjustment R662 for exactly 1000 volts See Fig 5 1 3 Check Adjust Grid Bias a Connect the digital voltmeter to the 0 2 volt test point b Rotate the INTENSITY to the fully clockwise position c Check the digita...

Page 25: ...ng of 0 6 to 0 8 of a volt on the digital voltmeter d Check for a 0 volt reading on the digital voltmeter when the instrument is disconnected from the power line 75 Volts 5th Pin Connector From Rear 48 Volts 4th Pin Connector From Rear OANC i 2nd Pin Connector From Rear Battery Charge BC Test Point Fig 5 2 Location of the 75 volt 48 volt and the battery charger test points Behind Pot TP R662 High ...

Page 26: ... screwdriver adjustment on sidepanel for a trace that is parallel with the horizontal graticule lines See Fig 5 4 Astig Adjust Rear View R752 r Fig 5 3 Location of Astigmatism and CRT Unblanking adjust ments 8 Check Adjust CRT Unblanking a Set the INTENSITY to maximum and set the SEC DIV switch to 1 i b Adjust unblanking adjustment R753 see Fig 5 3 so that retrace is just blanked out 9 Check Geome...

Page 27: ... trace to the center horizontal graticule line b Set the VOLTS DIV setting to 0 1 and the VOLTS DIV VAR to minimum counterclockwise direction c Check that there is less than 0 1 division of trace shift when varying the VOLTS DIV VAR control d Adjust the VAR VOLTS DIV BAL adjustment for a trace shift for no more than 0 1 division See Fig 5 5 12 Check Adjust Probe Compensation a Set the VOLTS DIV sw...

Page 28: ...s Set the output of the square wave generator for a five kHz four division signal t Set the SEC DIV switch to 1 m Vert Gain C126 C123 R417 1 5 7 3 1 6 Fig 5 6 Location of attenuator compensation and Vertical Gain adjustments u Check for a flat square wave v Adjust C l28 for a flat square wave w Set the square wave generator for a 50 kHz signal x Set th e SEC DIV sw itch to 10 Us y Check for a flat...

Page 29: ...e SEC DIV switch to 1 m and MAG to IX b Connect the constant amplitude signal generator to the 221 Use a GR to BNC adapter 50 ohm termination and a probe tip to BNC adapter c Set the constant amplitude signal generator to 50 kHz and adjust the output amplitude of the constant amplitude signal generator for a deflection of six divisions d Adjust the frequency of the constant amplitude signal genera...

Page 30: ...a Set the VOLTS DIV switch to 5 m b Set the amplitude of the standard amplitude cali brator to 100 volts dc b Connect the probe through a probe tip to BNC adapter to a 50 ohm termination c Set the INPUT COUPLING switch to GND and position the trace to center graticule line c Change INPUT COUPLING switch from GND to AC d Set the INPUT COUPLING switch to AC d Check for a trace shift of less than 0 1...

Page 31: ...ng a dual banana plug adapter GND on adapter to COMMON d Set the VOLTS DIV switch to 1 b Set the INPUT COUPLING switch to DC e Check that the display remains triggered stable c Set the SEC DIV switch to 5 i f Adjust the AUTO PRESET R214 side panel screw driver adjustment for a triggered display See Fig 5 9 d Set the frequency of the constant amplitude signal generator to 50 kHz g Switch TRIGGER se...

Page 32: ...ration adjustments f Adjust Horizontal Gain adjustment R505 for a five division display See Fig 5 8 g Disconnect all the test equipment 24 Check Adjust Horizontal Magnifier Registration a Position the spot to the center of the crt graticule b Set the HORIZ MAG switch to the 10X position c Check that the spot remains within one division of graticule center d Adjust the Mag Regis adjustment R433 for...

Page 33: ...is time marks k Check that the time marks align with the graticule disregard the first 0 5 is of the display I Adjust C354 so that the time marks align with the center eight graticule lines See Fig 5 9 m Set HORIZ MAG to 10X n Set time mark generator for 1 is time marks o Check that the time marks align with the center eight divisions of the graticule within 5 disregard first 5 is of sweep 27 Chec...

Page 34: ...onent on the boards is identified by its circuit number The components are listed in the table near the circuit board layouts To find a component locate it in the component list and note the coordinates listed with it Locate the coordinates on the layout and the component is located within this area Troubleshooting Equipment The majority of troubleshooting to be done on the 221 can be accomplished...

Page 35: ...stripe nearest the end of the resistor Composition resistors have four stripes that consist of two significant figures a multiplier and a tolerance value see Fig 6 2 Precision resistors have five stripes consisting of three significant figures a multiplier and a tolerance value The capacitance value of common disc capacitors and small tubular electroiytics is marked in microfarads on the side of t...

Page 36: ...RTER CIRCUIT 48V 75V AND 1 kV SUPPLY WITHIN TOLERANCE NO TRACE CHECKTRIGGER CIRCUITS CHECK VERTICAL AND HORIZONTAL AMPLIFIER OUTPUT VOLTAGE LEVELS MIDRANGE HORIZONTAL AND VERTICAL POSITION CONTROLS SET TRIGGER TO AUTO PRESET INT NO TRACE CHECK BLANKING CIRCUIT CHECK HORIZONTAL SPOT ONLY AND SWEEP CIRCUITS TRACE APPEARS CHECK VERTICAL AND HORIZONTAL POSITIONING NO VERTICAL POSITIONING NO HORIZONTAL...

Page 37: ...onic components some special components are used in the 221 These components are manufactured or selected by Tektronix Inc to meet specific requirements or are manufactured for Tektronix Inc in accordance with our specifications Most of the mechanical parts used in this instrument have been manufactured by Tektronix Inc Order all special parts directly from your local Tektronix Field Office or rep...

Page 38: ...ers for replacement parts Troubleshooting Aids Circuit board extenders are available to allow trouble shooting boards with power applied Order Tektronix Part No 067 0760 00 for Power Supply board extender and 067 0761 00 for Amplifier board extender Recalibration After Repair After any electrical component has been replaced the calibration of that particular circuit should be checked as well as th...

Page 39: ...will contact you concerning any change in part number Change information if any is located at the rear of this manual SPECIAL NOTES AND SYMBOLS X000 Part first added at this serial number 00X Part removed after this serial number ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For fur...

Page 40: ...180 32293 INTERSIL INC 10900 N TANTAU AVE CUPERTINO CA 95014 32997 BOURNS INC TRIMPOT PRODUCTS DIV 1200 COLUMBIA AVE RIVERSIDE CA 92507 51642 CENTRE ENGINEERING INC 2820 E COLLEGE AVENUE STATE COLLEGE PA 16801 56289 SPRAGUE ELECTRIC CO NORTH ADAMS MA 01247 71450 CTS CORP 905 N WEST BLVD ELKHART IN 46514 72982 ERIE TECHNOLOGICAL PRODUCTS INC 644 W 12TH ST ERIE PA 16512 73138 BECKMAN INSTRUMENTS INC...

Page 41: ...CAP VAR PLSTC 1 8 1OPF 500V 80031 2805D1R810BH02FO Cl26 281 0178 00 CAP VAR PLSTC 1 3 5PF 500V 80031 2805D013R5BH02F0 C127 283 0729 00 CAP FXD MICA D 2500PF 5 500V 00853 D19 5E252J0 C128 281 0182 00 CAP VAR PLSTC 1 8 10PF 500V 80031 2805D1R810BH02F0 C133 283 0204 00 CAP FXD CER DI 0 01UF 20 50V 72982 8121N061Z5U0103M Cl64 283 0095 00 CAP FXD CER DI 56PF 10 200V 72982 855 535A560K C167 281 0182 00 ...

Page 42: ...F 80 20 50V 72982 C542 283 0110 00 CAP FXD CER DI 0 005UF 80 20 150V 56289 C544 283 0110 00 CAP FXD CER DI 0 005UF 80 20 150V 56289 C545 283 0348 00 CAP FXD CER DI 0 5PF 0 1PF 100V 51642 C548 283 0317 00 CAP FXD CER DI 1PF 0 1PF 500V 72982 C556 283 0317 00 CAP FXD CER DI 1PF 0 1PF 500V 72982 C557 290 0525 00 CAP FXD ELCTLT 4 7UF 20 50V 56289 C571 290 0530 00 CAP FXD ELCTLT 68UF 20 6V 90201 C572 28...

Page 43: ...80 20 150V 72982 855 558Z5U 103Z CR132 152 0246 00 SEMICOND DEVICE SILICON 40V 200MA 80009 152 0246 00 CR137 152 0141 02 SEMICOND DEVICE SILICON 30V 50NA 80009 152 0141 02 CR162 152 0141 02 SEMICOND DEVICE SILICON 30V 50NA 80009 152 0141 02 CR165 152 0141 02 SEMICOND DEVICE SILICON 30V 50NA 80009 152 0141 02 CR175 152 0141 02 SEMICOND DEVICE SILICON 30V 50NA 80009 152 0141 02 CR176 152 0141 02 SEM...

Page 44: ...2 0107 00 CR713 152 0107 00 SEMICOND DEVICE SILICON 400V 400MA 80009 152 0107 00 CR715 152 0107 00 SEMICOND DEVICE SILICON 400V 400MA 80009 152 0107 00 CR716 152 0107 00 SEMICOND DEVICE SILICON 400V 400MA 80009 152 0107 00 CR733 152 0040 00 B010100 B020679 SEMICOND DEVICE SILICON 600V 1A 80009 152 0040 00 CR733 152 0586 00 B020680 SEMICOND DEVICE SILICON 600V 500MA 14936 RGP10J CR734 152 0040 00 B...

Page 45: ...0 Q322 151 0367 00 B010100 B020849 TRANSISTOR SILICON NPN SEL FROM 3571TP 80009 151 0367 00 Q322 151 0333 00 B020850 TRANSISTOR SILICON NPN SEL FROM MPS918 04713 SPS1752 Q324 151 0367 00 B010100 B020849 TRANSISTOR SILICON NPN SEL FROM 3571TP 80009 151 0367 00 Q324 151 0333 00 B020850 TRANSISTOR SILICON NPN SEL FROM MPS918 04713 SPS1752 Q326 151 0190 00 TRANSISTOR SILICON NPN 07263 S032677 Q328 151...

Page 46: ...7 MFF1816D20001D R123 321 0646 00 RES FXD FILM 200K OHM O 5 0 125W 91637 MFF1816D20002D R124 321 0222 01 RES FXD FILM 2K OHM O 5 0 125W 91637 MFF1816G20000D R126 321 0646 00 RES FXD FILM 200K OHM 0 5 0 125W 91637 MFF1816D20002D R127 321 0126 01 RES FXD FILM 200 OHM O 5 0125W 91637 MFF1816G200R0D R133 321 0159 00 RES FXD FILM 442 OHM 1 0 125W 91637 MFF1816G442R0F R134 321 0158 00 B010100 BO10419 RE...

Page 47: ...0 RES FXD CMPSN 91OK OHM 5 0 25W 01121 CB9145 R233 315 0134 00 RES FXD CMPSN 130K 0HM 5 0 25W 01121 CB1345 R234 315 0105 00 B010100 B010579 RES FXD CMPSN 1M OHM 5 0 25W 01121 CB1055 R234 315 0914 00 B010580 RES FXD CMPSN 910K OHM 5 0 25W 01121 CB9145 R235 315 0102 00 RES FXD CMPSN IK OHM 5 0 25W 01121 CB1025 R236 315 0102 00 RES FXD CMPSN IK OHM 5 0 25W 01121 CB1025 R237 315 0242 00 B010100 B01057...

Page 48: ...50R0F 01121 CB2215 91637 MFF1816G787ROF 91637 MFF1816G10501F 91637 MFF1816G69800F 91637 MFF1816G17400F 91637 MFF1816G15800F 91637 MFF1816G43200F 01121 CB1255 91637 MFF1816G44200F 91637 MFF1816G665R0F XB054451 BOIOIOO B010580 RES FXD CMPSN 20K OHM 5 0 25W RES FXD CMPSN IK OHM 5 0 25W RES FXD CMPSN 2K OHM 5 0 25W RES FXD CMPSN IK OHM 5 0 25W RES FXD FILM 5 9K OHM 1 0 125W RES FXD CMPSN 8 2K OHM 5 0 ...

Page 49: ...0219 00 RES FXD FILM 1 87K OHM 1 0 125W 91637 MFF1816G18700F R525 321 0184 00 RES FXD FILM 806 0HM 1 0 125W 91637 MFF1816G806R0F R526 321 0185 00 RES FXD FILM 825 OHM 1 0 125W 91637 MFF1816G825R0F R527 321 0264 00 RES FXD FILM 5 49K OHM 1 0 125W 91637 MFF1816G54900F R532 321 0306 00 RES FXD FILM 15K OHM 1 0 125W 91637 MFF1816G15001F R533 311 1245 00 RES VAR NONWIR 10K OHM 10 0 50W 73138 72 28 0 R5...

Page 50: ...0392 00 B022749 RES FXD CMPSN 3 9K OHM 5 0 25W 01121 CB3925 R731 315 0102 00 RES FXD CMPSN IK 0HM 5 0 25W 01121 CB1025 R732 315 0205 00 RES FXD CMPSN 2M OHM 5 0 25W 01121 CB2055 R733 311 1646 00 RES FXD VAR NONWIR 2M OHM 20 0 SOW 73138 72 97 0 R734 315 0205 00 RES FXD CMPSN 2M OHM 5 0 25W 01121 CB2055 R735 315 0205 00 RES FXD CMPSN 2M OHM 5 0 25W 01121 CB2055 R736 315 0103 00 RES FXD CMPSN 10K OHM...

Page 51: ...12V 5 80009 152 0168 00 VR626 152 0168 00 XB020807 SEMICOND DEVICE ZENER 0 4W 12V 5 80009 152 0168 00 VR634 152 0243 00 SEMICOND DEVICE ZENER 0 4W 15V 5 14552 1N965B VR654 152 0166 00 SEMICOND DEVICE ZENER 0 4W 6 2V 5 80009 152 0166 00 VR738 152 0287 00 SEMICOND DEVICE ZENER 0 4W 110V 5 04713 1N986B VR757 152 0127 00 SEMICOND DEVICE ZENER 0 4W 7 5V 5 80009 152 0127 00 REV C JAN 1980 8 13 ...

Page 52: ...tify components or assemblies on the diagrams A Assembly separable or repairable H Heat dissipating device heat sink RT Thermistor circuit board etc heat radiator etc S Switch AT Attenuator fixed or variable HR Heater T T ransformer B M otor HY Hybrid circuit TC Thermocouple BT Battery J Connector stationary portion TP Test point C Capacitor fixed or variable K Relay U Assembly inseparable or non ...

Page 53: ...dill IN PU T C O U P L IN G I PROBE 4r 5V I A C DC SOURCE 5V 221 O s c il l o s c o p e http manoman sqhi T com ...

Page 54: ...REV B j JU L Y 19 7 4 BLOCK DIAGRAM ...

Page 55: ...B331 R332 R328 351 R335 C324 Q316 M in M CC T 312 Q312 00 Q334 C333 CR318 S C O cc u Q324 R327 R214 0322 R315 8 9 10 11 12 S ill 13 14 15 C316 R258 C112 Q256 C100 0214 Q212 in R222 cv cc o o o M z r CM r O CN co CC CM PM CC Q222 I W C M CM CC CO C C 0218 Q216 S c c S521 R676 S235 R233 RZ32 C235 CZ32 R235 CR232 J232 R234 Q226 0 CO CC fs in IV c N a o N N CC C C R256 L237 N c c 0232 Q234 R228 R237 I...

Page 56: ...6 ts o c R352 R 4 1 8 C365 S213 R213 S738 R738 C362 r r n ID M m R112 C234 C233 R100 plOO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 157 3 2 4 Fig 9 2 A1 Input circuit board back Sl l B020475 above REV D FEB 1979 Note Shield Removed ht4p m ...

Page 57: ...Q214 R676 0236 0246 N Located on back of board C233 C362 C234 C365 Fig 9 3 A1 Input circuit board Below SIM B020475 ...

Page 58: ...mitter lead R137 CR132 o T cc o R153 R143 R 144 R 154 R 145 R155 R146 R147 R174 R175 a I tD I p s a r u 5 R156 R136 tC175 R 173 R176 R134 C O C O c n C D C O C O 4 fo C O C O u C N C O R164 C N 0 to C D h D C N C D D C O CO R165 D r C D 1573 26 Fig 9 4 A2 Preamplifier circuit board ...

Page 59: ...t to AUTO PRESET Input coupling switch to ground GND Voltmeter common is connected to the instrument common Waveform Measurements The 221 Oscilloscope under test The vertical deflection is set to 1 V with a four volt square wave connected to the probe tip and the SEC DIV switch is set for 0 5 m The TRIGGER LEVEL SLOPE set to AUTO PRESET with a triggered display Any change in the set up will be not...

Page 60: ...OO RIOO too j___ 80OK t m t i V E R T SIGMA I T O G 4 2 2 A L 192 2 0 0 4 H TftnT v w SV R192 4 1 V R1 9 4 4 7 T O R 4 I J D1A R A R T IA L A I IN P U T B O A R D 221 OSCILLOSCOPE REV B JULV 1974 P R E A M P L I F I E R j 1 ...

Page 61: ...LOPE set to AUTO PRESET Input coupling switch to ground GND Voltmeter common is connected to the instrument common Waveform Measurements The 221 Oscilloscope under test The vertical deflection is set to 1 V with a four volt square wave connected to the probe tip and the SEC DIV switch is set for 0 5 m The TRIGGER LEVEL SLOPE set to AUTO PRESET with a triggered display Any change in the set up will...

Page 62: ...M o v D IA FROM ufeSA p in a 5 V h PARTIAL A4 PWK S P l V B D UNBLANKING SIGNAL DtAG 5 5V Dcpta 5V dcple SWEEP OUT TO Q502 DIAG COMMON JS33 22 1 O S C I L L O S C O P i 1 5 7 3 2 8 R EV C FEB 1979 TR IG G E R S W E E P ...

Page 63: ...C573 8 7 6 5 R437 tf CO in D C Sgcv 8 S D C R533 0 51 8 Q526 Q522 Q516 C535 C447 N f cc m o D C CC C523 CM in S D C g O m D C R505 Q502 R502 R504 R503 R516 R519 C516 8 S D C L S i D C C512 K l C517 in CO o R415 R416 8 a F g g g X l a H k H i P r C435 s D C R436 C M CO C C C432 CR423 Q424 Q422 CR435 R435 R CR434 R425 R434 0426 C443 I h R433 d r R422 CT V T I R423 R424 C422 C423 CR422 NOTE CR469 and...

Page 64: ...OPE set to AUTO PRESET Input coupling switch to ground GND Voltmeter common is connected to the instrument common Waveform Measurements The 221 Oscilloscope under test The vertical deflection is set to 1 V with a four volt square wave connected to the probe tip and the SEC DIV switch is set for 0 5 m The TRIGGER LEVEL SLOPE set to AUTO PRESET with a triggered display Any change in the set up will ...

Page 65: ...v ON DIAS g SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED OR DEPICTED IN BLUE ON d ia g g 2 2 1 O S C I L L O S C O P E REV C M AY 1978 VER TICA l_ HORIZONTAL AMPLIFIERS g ...

Page 66: ...C657 U654 C663 R657 R656 s o ID S a cc C O C D C O U S P C O CO CJ C712 CR712 C666 S 0640 CR634 L632 R633 C633 R632 R634 Q634 R636 CR625 5 4 3 T623 9 6 F630 P632 VR634 C634 CU CR622 CD CO o c c CRS21 n n IE is I I T CO to CD eg CD sc cccc c CJ CJO o C615 R735 C C VR738 0 0 w C713 CR715 j j R734 u C715 CR713 C739 C714 L713 CR716 L716 C736 C737 R732 R733 C613 R614 C614 R613 16 17 18 19 20 21 22 23 2...

Page 67: ... g C647 to tr Q644 Q642 C644 to IT CC CR634 Q640 C715 3 cc VR634 C634 CR633 4 5 T633 6 CR632 R632 L632 R634 Q634 R636 CR626 n C737 C613 R626 Q626 Q622 T T 4 3 T623 9 6 So CR622CR621 3 N t l J2 N 7 a s o cc g 0 A J C O a o CO C M iD CO C t o c O C O o C D C O C O CC CC D C G O O C615 C614 L610 N l r ID O to cc F610 N R733 2 M 02 3 2 7 16 17 18 19 20 2122 23 24 25 FIG 9 7 A4 Power supply circuit boa...

Page 68: ...P6I0 9 0 2 5 0 V AC 3 8 6 2 HH 8 0 2 5 0 V DC 2 2 1 O S C I L L O S C O P E R EV F M AYJ976 1S73 33 POWER SUPPLY SEE DIA6 5 S E E DIA6 ...

Page 69: ...LOPE set to AUTO PRESET Input coupling switch to ground GND Voltmeter common is connected to the instrument common Waveform Measurements The 221 Oscilloscope under test The vertical deflection is set to 1 V with a four volt square wave connected to the probe tip and the SEC DIV switch is set for 0 5 m The TRIGGER LEVEL SLOPE set to AUTO PRESET with a triggered display Any change in the set up will...

Page 70: ...1573 34 REV C FE S 5 7 9 C R T C I e c u IT S W E 2 Z i O S C IL L O S C O P E ...

Page 71: ...icates the end of attaching parts Attaching parts must be purchased separately unless otherwise specified ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS INCH ELC...

Page 72: ...NICS INC YOUK EXPRESSWAY NEW CUMBERLAND PA 17070 23050 PRODUCT COMPONENTS CORP 30 LORRAINE AVE MT VERNON NY 10553 49671 RCA CORPORATION 30 ROCKEFELLER PLAZA NEW YORK NY 10020 73743 FISCHER SPECIAL MFG CO 446 MORGAN ST CINCINNATI OH 45206 76545 MUELLER ELECTRIC CO 1583 EAST 31ST ST CLEVELAND OH 44114 77250 PHEOLL MANUFACTURING CO DIVISION OF ALLIED PRODUCTS CORP 5700 W ROOSEVELT RD CHICAGO IL 60650...

Page 73: ...WITCH POLYCARBONATE 80009 23 401 0127 01 1 ROTOR ELEC SW W CONTACTS 80009 24 337 1844 00 1 SHLD ELECTRICAL PREAMPLIFIER OUTER 80009 ATTACHING PARTS 25 211 0069 00 1 SCREW MACHINE 2 56 X 0 125 INCH PNH STL 77250 26 200 1232 00 1 COVER RTRY SW CIRCUIT BOARD 80009 ATTACHING PARTS 27 210 0405 00 3 NUT PLAIN HEX 2 56 X 0 188 INCH BRS 73743 28 401 0127 01 1 ROTOR ELEC SW W CONTACTS 80009 29 214 1863 01 ...

Page 74: ...ACT ELEC CKT CARD GROUND 80009 131 1172 00 64 136 0252 04 76 SOCKET PIN TERM U W 0 016 0 018 DIA PINS 22526 75060 007 65 136 0328 02 15 SOCKET PIN TERM HORIZONTAL 00779 86282 2 66 253 0154 00 4 TAPE PRESS SENS 0 125 THK 18121 MT8 67 342 0205 00 1 INSULATOR FILM PREAMPLIFIER CARD 80009 343 0205 00 136 0582 00 1 SKT PL IN ELEK ELECTRON TUBE 11 CONTACT 80009 136 0582 00 68 136 0555 00 1 SKT PL IN ELE...

Page 75: ... 2 INSULATOR PLATE TRANSISTOR 01295 10 21 023 106 342 0332 00 B022706 2 INSULATOR PLATE TRANSISTOR SILICONE RUBBER 08530 OBD 101 344 0255 00 2 CLIP ELECTRICAL FUSE MOUNT 80009 344 0255 00 102 342 0176 01 1 INSULATOR FILMiPOWER SUPPLY CARD 80009 342 0176 00 103 200 1467 00 1 COVER CORD WRAP PROBE LOWER 80009 200 1467 00 104 334 2117 00 1 LABEL IDENT WARNING FOR 22 80009 334 2117 00 105 348 0254 00 ...

Page 76: ......

Page 77: ...221 OSCILLOSCOPE ...

Page 78: ...R Y I N G 8 0 0 0 9 0 1 6 0 5 1 2 0 0 3 3 4 6 0 1 0 4 0 0 1 S T R A P C A R R Y I N G 1 7 5 1 6 4 1 8 8 B A 4 1 5 9 0 0 8 0 0 0 2 F U S E C A R T R I D G E 0 2 A 2 5 0 V S L O W B L O W 7 5 9 1 5 2 1 3 2 0 0 0 7 0 1 5 7 2 0 0 1 M A N U A L T E C H O P E R A T O R S N O T S H O W N 8 0 0 0 9 0 7 0 1 5 7 2 0 0 0 7 0 1 5 7 3 0 1 1 M A N U A L T E C H S E R V I C E N O T SHOW N 8 0 0 0 9 0 7 0 1 5 7 3...

Page 79: ...High Am plitude output put 60 V 100 V 067 0502 01 PG 506 Does not have 0502 01 Com parator output chopped feature can be alternately chopped to a refer ence voltage SG 503 replaces 190 190A 190B SG 503 Am plitude range 190B A m plitude range 40 mV 5 mV to 5 5 V p p to 10 V p p 191 067 0532 01 SG 503 Frequency range 0532 01 Frequency range 250 kHz to 250 MHz 65 MHz to 500 MHz SG 504 replaces 067 05...

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