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AM 503 CURRENT PROBE AMPLIFIER

1. 7 8558 KURTAN 0515 2306 S 2 GAIN SELECT FROM J100 DIAG 5 4 8030829 AND BELOW bi ATTEHGATERO AL EGNA L 22305 P300 D 8506 S 1 7 87 k 1 MD IDC LEVEL ATTENUATED AC SIGNAL FROM 02308 DIAG S N 8030830 AND UP C85I 01 2352 __ ______ _ _______ AMPLIFIER RIS X 019 X 6346 PIN GROUNDED 536 levi CZ SELECTABLE Q360 CSS ras 6 VOLTAGE amp WAVEFORM F CONDITIONS 7 ES 5 6 PARTIAL Al AMPLIFIER BOARD 2052 35 503 REY 1983 OL LNdLNO 5200 DI 774 OSCILLOSCOPE 10 mv DIV OWITCH SHOWN IN 2 ImA POSITION 5 m 10 20 50 5510 0 SEE PARTS LIST FOR EARLIER 0 2 i VALUES AND SERIAL NUMBER 0 5 RANGES PARTS OUTLINED OR DEPICTED IN GREY 5 MHz 5 30 I 6310 3 7 49 R370 I OUTPUT i I po 665 R397 gt 2 AAA 21 47 5 I6V R394 2392 249 5882 2k 8 394 58399 0295 33 26 OY 2527 gt gt case C396 DU TL pr S Ere a NM VR380 anum 3v OUTPUT AMPLIFIER C385 1383 CR383 401 19 386 49
2. Plug Index SEL Value Selected 3 at Factory 1 RIA Refer to Waveform SEL 12 X 2 3 J M A Refer to Diagram Number Test Voltage J13 Dto Internal z Coaxial Connector Shielding Screwdriver 10 5 Adjustment S Heat Sink 9 Decoupled or Filtered Voltage Assembly Number AMPL I2V Etched Circuit Board Board Name Outlined in Black VERTICAL BOARD VERTICAL AMPLIFIER gt lt and Number REV FEB 1982 SINVHOVIO Z NOIL23S x CURRENT PROBE CONNECTIONS ON XIO CURRENT PROBE ONLY MECHANICALLY LINKED PROBE N SLIDER N GROBE SHIELD CLOSED AM 503 CURRENT TRANS FORMER CONNECTOR 2100 LAM DRIVERS 0185 3V PROBE UNLOCKED BALANCE HALL DEVICE PREAMP HALL DISCONNECT 915 5125 DEGAUSS sia L o 6V L S200A CURRENT DIV SWITCH R206 R208 52008 ATTENUATOR lt gt AMPLIFIER lt gt 2052 32 REV B OCT 19179 5310 BANDWIDTH FULL Y 5 MHz 16V DC LEVEL 5200A CURRENT DIV SELECT L C BANDWIDTH AMPL OUTPUT J390 AMPL OUTPUT 9 INTO 504 0360
3. Power supply test point and adjustment locations Gain and compensation adjustment locations Example of correct compensation Lubrication procedure for a typical cam switch Semiconductor lead configurations Installation of lead end connectors Circuit board and ferrule assembly ae AM 503 and probe waveforms __ DEC 1980 AM 503 OPERATOR S SAFETY SUMMARY The following text contains a two part summary of general safety precautions that must be observed during all phases of operation service and repair of this instrument OPERATORS SAFETY SUMMARY The general safety information in this part of the summary is for both operating and servicing personnel Specific warnings and cautions will be found throughout the manual where they apply but may not appear in this summary TERMS In This Manual CAUTION statements identify conditions or practices that could result in damage to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life As Marked on Equipment CAUTION indicates a personal injury hazard not im mediately accessible as one reads the marking or a hazard to property including the equ
4. CER DI 0 01UF 20 50V FXD CER DI 0 01UF 20 50V CAP FXD CER 01 0 040 20 50V CAP FXD CER 01 0 010 20 50 CAP FXD MICA 01 1 100V CAP FXD PLASTIC 0 47UF 10 50V CAP FXD MICA 01 4730PF 1 500V CAP FXD ELCTLT 4 7UF 20 50 CAP DI 1UF 80 202 25V CAP PLASTIC O 1UF 124 200V D1 0 0033UF 54 100V CAP FXD ELCTLT 10UF 202 25V TANTALUM CAP CER D1 0 01UF 202 50V 01 0 01UF 202 50V CAP MICA DI 43PF 5X 500V MICA 01 82PF 1 500V CAP FXD ELCTLT 47UF 20 50V CAP CER D1 0 01UF 20 50V CAP FXD CER DI 0 01UF 20 50V CAP ELCTLT 4 UF 20 50V CAP FXD CER 01 1500 5 200V CAP FXD CER D1 0 01UF 20 50V CAP FXD CER D1 0 01UF 20 50V CAP FXD CER 01 0 010 202 50 CAP FXD CER O1 2UF 20 50V CAP FXD CER DI 0 22UF 10 50V CAP FXD CER D1 0 01UF 202 50V CRP FXD CER DI1 0 01UF 202 50V FXD ELCTLT 22UF 20 15V DI 0 01UF 20X 50V ELCTLT 22UF 20 15 CAP CER D1 0 01UF 20X 50V CAP FXD CER 01 0 01UF 207 50V FXD CER D1 330PF 5 500V CAP 01 330PF 5X 500V CAP 01 0 010 20 50 01 43 5 500V DI 33PF 5 500V CAP 01 0 010 20
5. 0 19701 5043 047 50 2114 321 0289 00 RES FILM 40 0K OHM 15 0 125 TC TO 19701 5033ED10KOF R116 315 0471 00 RES 70 0IM 5X 0 25M 57668 NTR25J E470E R118 321 0289 00 RES FXO FILM 10 0K OHM 13 0 1258 0 19701 5033ED10K0F R120 311 0580 00 RES VAR NONNW 0 5 01121 8155 R121 321 0200 00 RES FXD FILM 1 18K 0HM 12 0 125M TC TO 19701 5033ED11K80F R122 321 0193 00 RES FXD FILM 1K OHM 1 0 125 0 19701 5033ED1KOOF R123 321 0183 00 RES FXD FILM 787 OHM 1X 0 125M TC TO 07716 CE 0D787ROF 8124 315 0225 00 RES FXD FILM 2 2M 5 0 250 01121 82255 R126 315 0470 00 8030000 RES FXO FILM 47 52 0 25 57668 NTR25J E467 0 R127 315 0474 00 RES FXD FILM 470K 5 0 25 19701 5043CX470KOJ92U R128 315 0105 00 RES FXO FILM 1M 0HM 5X 0 25N 19701 5043CX1M000J R129 321 0164 00 RES FILM 499 0MM 1X 0 125M IC 10 19701 5033ED4899ROF R130 315 0200 00 8010100 8019999 FILM 20 510 250 19701 5043CX20R00J R130 315 0300 00 8020000 RES FXD FILM 30 OHM 5 0 25 19701 5043 30800 R132 315 0105 00 RES FXD FILM M 0HM 5X 0 25N 19701 5043CX1M000J R133 315 0104 00 RES FILM 100K OHM 5 0 250 50668 NTR25J E100K R134 315 0104 00 RES FILM 100K OHM 54 0 25N 57668 NTR25J E100K R135 SELECTED NOMINAL VALUE R135 321 0230 00 8047649 8063100 RES FILM 2 43K OHM 14 0 1254 0 19701 5063 02 630 R
6. 1 SMITCH SLIOE SEE 5370 REPL ATTACHING PARTS 32 211 0030 00 2 SCREW MACHINE 2 56 X 0 25 FLH 82 DEG STL 83385 ORDER BY DESCR 33 220 0627 00 2 NUT PLAIN HEX 2 56 X 0 156 HEX BRS NP 73743 10002 56 101 34 210 0001 00 2 WASHER LOCK 2 INTL 0 013 THK STL 77900 1202 00 00 0541 ENO ATTACHING PARTS 35 1 RESISTOR VAR SEE 8120 REPL ATTACHING PARTS 36 358 0409 00 1 BSHG MACH 0 0 25 32 X 0 159 ID 0 247 L 80009 358 0409 00 37 210 0223 00 1 TERMINAL LUG 0 26 10 LOCKING TIN PL 86928 5441 37 38 210 0471 00 1 NUT SLEEVE 0 25 32 X 0 594 L X 0 312 HEX AL 80009 210 0471 00 39 210 0046 00 1 WASHER LOCK 0 261 ID INTL 0 018 THK STL 77900 1214 05 00 0541 END ATTACHING PARTS 40 2 LAMP LED SEE CR168 CR103 REPL 41 337 1430 00 2 SHIELD ELEC 80009 337 1430 00 42 378 0703 00 2 LENS LIGHT HOLOER CLEAR 80009 378 0703 00 43 214 1513 01 8010100 8036697 1 LCH PL IN RTNG PLASTIC 80009 214 1513 01 43 1 105 0719 00 8036698 1 LATCH RETAINING PLUG IN 80009 105 0719 00 43 2 105 0718 01 8036698 1 BAR LATCH RLSE 80009 105 0718 01 ATTACHING PARTS 44 213 0254 00 8010100 803669 1 SCR TPG TF 2 32 X 0 25 SPCL TYPE FLH STL 45722 ORDER BY DESCR END ATTACHING PARTS 45 396 3501 00 1 SUBPANEL FRONT 80009 386 3501 00 ATTACHING PARTS 46 213 0229 00 4 SCREM TPG TF 6 20 X 0 375 B FLH 93907 ORDER BY DESCR REV DEC 1985 8 3 Replaceable Mechanical Parts AM 503 Fig amp index Tek
7. AM 503 CURRENT PROBE AMPLIFIER INSTRUCTION MANUAL Tektronix Inc P O Box 500 Beaverton Oregon 070 2052 01 Product Group 75 97077 Tektronix COMMITTED TO EXCELLENCE PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL AM 503 CURRENT PROBE AMPLIFIER INSTRUCTION MANUAL Serial Number First Printing SEP 1976 Revised DEC 1985 Copyright 1976 1979 Tektronix Inc All rights reserved Contents of this publication may not be reproduced in any form without the written permission of Tektronix Inc Products of Tektronix Inc and its subsidiaries are covered by U S and foreign patents and or pending patents TEKTRONIX TEK SCOPE MOBILE and are registered trademarks of Tektronix Inc TELEQUIPMENT is a registered trademark of Tektronix U K Limited Printed in U S A Specification and price change privileges are reserved INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert tag or stamped on the chassis The first number or letter designates the country of manufacture The last five digits of the serial number are assigned sequentially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufacture is identified as follows B000000 Tektronix Inc Beaverton Oregon USA 100000 Tektronix Guernsey Ltd Channel Islands 200000 Tektronix United Kingdom Ltd London 300000 S
8. 5 24 5 0 25 57668 NTR25J E24K0 R153 315 0123 00 6030000 RES FD FILM 12K OHM 5 0 25 57668 NTR25J E12K0 R156 321 0181 00 RES FXO FILM 750 14 0 1250 0 07716 0750 0 8158 308 0441 00 RES FXD WW 3 OHM 5X 3M 14193 5431 3800 R159 322 0292 00 RES FXD FILM 10 7K 0HM 1x 0 25M TC TO 19701 5043R010K70F R160 321 0181 00 RES FXD FILM 750 1 0 125 TC TO 07716 0750 R162 322 0292 00 RES FXO FILM 10 7K OHM 1 0 25 0 19701 5043R010K70F R166 308 0441 00 RES WA 3 OHM 5 3M 14193 Sn31 3R00J R168 321 0068 00 RES FXD FILM 49 9 0 5 0 125 TC TO 91637 55116049890 R163 315 0620 00 RES FXD FILM 62 5 0 25 19701 5043 63800 8172 308 0243 00 5 240 52 3 14193 5431 2400 R174 315 0822 00 8010100 8020286 RES FXO FILM 8 2K OHM 5 0 19701 5043CX8X200 R175 315 0274 00 8010100 8047648 RES FXO FILM 270K OHM 5 0 25M 57668 NTR2SJ E270K R175 315 0103 00 8047649 RES FXD FILM 40K OHM 5 0 257 19701 5043CX10K00J 8176 315 0274 00 RES FXD FILM 270K 5 0 25 57668 NTR25J E270K 8181 302 0271 00 RES FXD CMPSN 270 OHM 10X 0 5M 01121 EB 2711 R182 345 0682 00 RES FXD FILM 6 8K OHM 5Z 0 25M 57668 NTR25J E06KS8 183 315 0153 00 RES FXO FILM 15K 5 0 25 19701 5063 15 00 8185 315 0512 00 8010100 0020286 RES FXO FIUM 5 1K OHM 5 0 25 57668 NTR25J 05K41 R197 315 0512
9. oe k T x 2 3 5 R x Sy h ee __ _ lt lt 2 _ 3 _ Located on back of board Fig 7 1 A1 Amplifier circuit board with component loca See Parts List for serial number ranges MATAR AO RE AONE SCY INHER NE ORA RARE UA iE NIA OC NA ONIN ANC CR nO OH Medo Odo rcd MEI GEMM RMA EET OLEAN ROE E __ 402 et A ite aui ast i E x Y 1 F 2 T _ _ __ As T f gt lt R480 15 i EA i SANA CA AA Sor IPEDS gala Haeo gan aat za RATIO AAGA O MIEN BO NARI AO SSRN ONE IB HAN HO rdc I AMI Nc Io MPO PRR Bo 2538 20 2052 43 board with component locations of components SN B030830 amp above REV C OCT 1979 CMI M0 C100 C108 C110 C112 C124 C125 C133 C137 C138
10. 136 0269 02 8010100 8056559 1 9 ELEK MICROCIRCUIT 14 DIP 09922 011814 1087 98 136 0728 00 8056550 1 OKT PL IN ELEK MICROCKT 14 CONTACT 09922 011814 108 33 131 1030 00 8010100 8033999 43 CONT ASSY ELEC CAM SWITCH BOTTOM 80009 131 1030 00 131 1030 00 8034000 3 CONT ASSY ELEC CAM SWITCH BOTTOM 80009 131 1030 00 131 1030 01 8034000 8047648 10 CONT ASSY ELEC CAM SWITCH BOTTOM 80003 131 1030 01 131 1030 00 8047649 8049985 13 CONT ASSY ELEC CAM SWITCH BOTTOM 80009 131 1930 00 131 1030 01 8049996 8059852 13 ASSY ELEC CAM SWITCH BOTTOM 80009 131 1030 01 131 1030 06 8059853 13 ede 80009 131 1030 06 ATTACHING PARTS 400 210 3082 00 13 EYELET METALLIC 0 047 00 X 0 133 L BRS NP 61957 56494 MODIFIED END ATTACHING PARTS 101 131 1031 00 13 ASSY ELEC CAM SWITCH TOP 80003 131 1031 00 102 214 0973 00 8010100 8029999 1 SINK XSTR TO 92 CU BE CD PL 80009 244 0973 00 103 136 0269 02 1 SSKT PL IN ELEK MICROCIRCUIT 14 DIP 09922 011814 108 131 0566 00 8030000 2 5 0 0 00 RES 0 094 00 X 0 225 L 24546 OMA 07 4104 214 1061 00 1 CONTACT ELEC GROUNDING BE 80009 214 1061 00 105 426 0725 05 1 FR SECT PLUG IN TOP 80009 426 0725 05 105 1 386 3657 01 8036698 2 SUPPORT PLUG IN 83486 ORDER BY OESCR 105 2 210 1270 00 8036698 2 WASHER FLAT 0 14110 X 0 04THK 0L 0 21900 80009 210 1270 00 106 426 0724 14 1 FR SECT PLUG IN BOTTOM 80009 426 0724 14 198 0001 00 1
11. 1C 1C 1C 2C 3C 3C 3C 2C 2C 1C 1C 1C 1C CMI GRID GRID CKT GRID CKT GRID CMI GRID CKT GRID NC LOC NO LOC NO LOC NO LOC NO LOC NO LOC R352 20 8368 R391 2F 8414 2G RT160 4H VR103 5G R353 10 R370 1E R392 1F 8415 26 RT342 3 VR166 5G R354 2D R372 1D R393 2D 8416 16 RT135 48 VR167 5G R356 10 8373 16 8394 2F R422 1H VR172 4D 8356 2D R374 1D 8395 2F R432 2G 125 5A VR187 4C R357 2D R376 2E R396 1 R436 3G S200A 4C VR380 26 R358 2 R377 2E R397 2F R442 1G VR452 3H R360 R380 16 R398 2F R446 1G U110 5E VR462 3H R361 8382 16 R399 8452 3H 0135 4B R362 2 R383 2 8403 2H 8454 0145 R363 3D R384 2E R404 2G R462 2H U350 2 R364 2D R386 2L R405 2G R464 2H U370 2D R365 2D 8387 2F R406 1G 8480 BJ U410 2G 8366 2 R388 8407 1H R367 1D R390 16 R412 3H RT156 SH VR100 50 Reid 45 ESTAS Bc zz _ _ _ _ 2 uum gt Q Q OS o e TEE gt 2 T 20508 4 6 _ Ze m 4 gt 2 oz lt CI 99 O z 72 x Olul 1 4 OO UY fa 27 2 1 k 2 _ w I I
12. 20 V The output voltage of the 16 V supply is adjusted by the Volts control R405 The Balance control R415 sets the 16 V supply output to match the 16 V supply R403 and R407 are the load current sensing resistors They set the bias on the series pass transistors locatedin the power module The output voltage is sensed at the sense input U410 pins 4 and 11 This sense voltage determines the current in R403 and R407 For example if the voltage at the 16 V output decreases the sensing circuit increases the current in R403 which increases the forward bias on the series pass transistor Thus the output voltage increases to 16 V The current through VR452 and VR462 is set to cause 20 V drop across them This 20 V sets the pass transistor bases Q450 Q460 at 20 V With 20 V on the base the output is at about 19 3 V REV A NOV 1979 Section 6 AM 503 REPLACEABLE ELECTRICAL PARTS 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 our engineering department It is therefore important when ordering parts to include the following information in your order Part number instrument type or number seria number and modification number if appl
13. ULATVAR TEA CAP FXO ELCTLT 4 75 102 35V0C 65680 ULATVAR TEA LT EMITTING OIO RED 660NM 100MA 58361 5024 SEMICOND VC 01 5M 51 30 150MA 30V 00 35 03508 042527 444152 SEMICONO 1 5 51 30 150 8 00 35 03508 042527 1 4152 SEMICONO OVC DI SM SI 30V 150M 30V 00 35 03508 042527 1 4152 SEMICOND 0VC 01I 5M 51 30V 150M 30 00 35 03508 002527 1N4152 SEMICOND 0VC 01 5M 51 30V 150M 30V 00 35 03508 042527 104152 SEMICONO 0VC 0I S8 91 30V 150M0 30V 00 35 03506 042527 144152 SEMICOND 01 51 2007 18 14936 WO2M 30 LT EMITTING 010 60 660MM 100M8 58361 MV5025 SEMICONO 0VC 01 5M 51 30V 150MA 30V 00 35 03508 042527 104152 SEMICOND OVC 01 50 51 30 0 1 00 75 07263 541480 SEMICONO 01 50 51 30 150 30V 00 35 03508 042527 104152 SEMICOND 0VC 01 5M 51 30V 150 30V 00 35 03508 042527 144152 SEMICOND 1 5 51 30V 150 30V 00 35 03508 04252 1 4152 SEMICOND 0 01 5 8 51 30 150 0 30 00 35 03508 002527 1 4152 SEMICONO OVC OI RECT SI 200V 14 14936 M02M 30 SEMICONO DVC DI RECT SI 200V 18 11936 020 30 SEMICOND OVC 01 50 SI 30V 150MA 30V 00 35 03508 042527 1N4152 SEMICOND 0VC 0I SM SI 30V 150MAh 30V 00 35 03508 042527 1N4152 INCAND 10 0 044 21070 NIRE LEAD 71744 2107 LAMP INCANO 10V 0 040 21070 NIRE LEAD 71744 2107 FUSE CARTRIDOGE OIN 250 10SEC 7591
14. 1 0 25 TC TO 75042 CEBTO 6040F 6 6 1985 Tektronix Serial Assembly Mfr Component No No Effective Name Description Code Mfr Part No _ R323 315 0151 00 010100 8029999 RES FXD F11M 150 5 0 257 57668 NTR25J E150E R323 321 0068 00 8030000 RES FXD FILM 49 9 OHM 0 5 0 125 0 91637 CMWF55116G49R90F R326 321 0216 00 8010100 8029999 RES FXD FILM 1 74K 0MM 1 X 0 125M IC I0 07716 CEA017400F R326 315 0821 00 B030000 RES FXD F1LM 820 0HM 5X 0 25N 19701 5043CX820R0J R327 321 0242 00 RES FXD FILM 3 24K OHM 1 0 125W TC T0 19701 5043ED3K240F R328 317 0680 00 RES X0 CMPSN 68 52 0 125 01121 886805 R330 322 0662 00 8 010100 8029999 RES FXD FILM 334 12 0 25 75042 CEBTO 33q0F R330 321 0140 00 8030000 RES FXD FILM 280 OHH 1 0 125W TC T0 07716 CE RD280ROF R332 321 0068 00 8010100 8029999 RES FXD FILM 49 9 0 0 5 0 125 0 91637 55116649890 R332 321 0097 00 8030000 RES FXD FILUM 100 1 0 125 TC TO 91637 CMWF55116G100R F R334 321 0068 00 8010100 B029999 RES FXD FILM 49 9 0 5 0 125 lt 91637 CMF55116G49R90F R334 321 0097 00 8030000 RES FXD FILM 100 QHM 1X 0 125M 0 91637 CMF551166100R0F R335 322 0109 00 RES FXD F1LM 133 0HM 1X 0 25M 0 91637 MFF1421G133RO0F R336 321 0111 00 RES FXD FILM 140 0HM 1X 0 125M TC TO 07716 CEAD140R0F R338 321 0111 00 RES FXD FILM 190 1 0 1
15. 50V 01 0 01UF 20 50V CAP MICA 01 33 L 5 500V VAR O1 7 45PF 25V 01 0 00560 20X 100V CAP FXD MICA 01 56 4 100 DI 43PF 5X 500V SELECTED CER 01 20 20 50 FXD CER 01 0 010 10 50V CAP 01 0 015UF 20 50V CAP FXD CER 01 0 010 20 50 Mfr Code 80009 80009 80009 80009 80009 80009 04222 04222 04222 04222 04222 00853 14752 00853 0539 04222 14752 04222 0539 04222 04222 00853 00853 56289 04222 04222 56289 59660 84222 04222 04222 04222 0539 04222 04222 05397 04222 0539 04222 04222 59660 59660 04222 00853 00853 04222 04222 00853 59660 51642 00853 00853 04222 04222 04222 04222 Mfr No 6 0 4353 00 670 4353 01 670 4353 02 6 0 4353 03 670 4353 04 670 4353 06 SR4558403MR0 58195 103 50455C103M80 155 103 58 155 103 4 D155E 00F0 2308 1A474K D195F1731F0 13688475M05085 SR302E105700 23081 104 583014332 44 T368B106M02505 SR155E103MAA SR155E103MAn D105E430J0 0105 820 0 1090476X0050F 2 58155 103 00 SR155E103MAA 1090426 0050 2 805 534 Y500152J SR155E103KAA SR155E103MAA SR155E103MAA 58405 205 00 330 224 585 0 58155 103 00 SR155E103MAA 11408226M0158S SR1558103MQ0R T1108226M0458S SR155E103MAA 58155 10 8
16. C140 C146 C148 C153 C155 C156 C160 C165 C168 C172 C176 C2181 C220 C232 C234 C242 C244 C306 C308 C328 C345 C351 C360 C363 C364 C365 C366 C367 C380 C383 C385 C388 C391 C393 C394 C396 C398 C402 C406 C413 C414 C423 C434 C436 C444 C446 C452 C462 CR115 CR116 CR127 GRID LOC 5D 5E 4E 5E 5E 4G 4A 5A 5B _ 4F 5F 4G 5H 5H 4H 41 4H 4D 5C 3A 3B 2A 2A 2A 2B 2B 2C 2C 2C 20 30 20 2D 1D 2D 2C 2C 3C 2F 1D 2F 1F 26 3 21 26 2C 2G 3G 3G 1G 1G 4H 3H 5F 5F 5A CKT NO CR133 CR167 CR175 CR226 CR320 CR380 CR383 CR386 CR402 CR406 F402 T F406 t L168 L202 L380 L383 P110 P120 P160 P168 P190 P195 P202 P302 P346 P370 P380 t P470 P475 P480 t Q115 0130 0155 0165 0180 0185 0230 0310 0315 0325 0360 0385 0390 0395 0440 0450 0460 0470 R100 R102 R103 R104 R105 R106 R108 R110 GRID LOC 5B 5G 5D 2A 2B 2E 2E 2F 3J 1J 3 1J 4H 3G 2E 2C 50 5F 4H 5G 4C 5C 3C 18 1C 16 3F 4J 5J 5J 5F 4A 5 4I 5C 5C 38 28 2C 2C 36 2C 1C 2E 2H 3G 3G 1H 4D 5D 5G 5D 5D 5D 5E 4E CKT GRID NO LOC R112 5E R113 5E R114 5E R116 R118 4E R121 4G R122 5E R123 4G R124 5F R126 5A R127 4A R128 R129 5G R130 4B R132 133 4A R134 4B R135 5A R136 5B R137 5B R138 5B R140 4B R145 SF R146 4F R148 5F R150 5F R151 5G R152 5G R153
17. F406 b U410 c 0155 0166 d R403 R407 a Q450 Q460 b VR452 VR462 0130 0135 R136 0155 0115 0145 503 Table 4 2 cont TROUBLESHOOTING E TROUBLE SYMPTOM Excessive Droop in Pulse Response CHECK 1 Probe is CLOSED 2 3 V Supply 3 R364 Adjustment 4 Voltage at P202 with DEGAUSS button depressed is 11 V p p with probe connected 5 Press and release DEGAUSS button and set OUTPUT voltage at P202 to zero with BALANCE control Voltage at P202 should be 20 mV p p with 40 mA p p into P6302 probe F TROUBLE SYMPTOM Poor Bandwidth CHECK 1 16 V Supply 2 Gain Adjustment R344 3 Aberrations Adjust ments R345 and R363 4 With Coupling set to CAL DC LEVEL adjust DC LEVEL for zero volt at OUTPUT con nector and check bias II CHECK indicates a pro blem examine the following components and replace if necessary a VR100 b VR172 a Cables from J100 to P160 and P202 are properly installed b 0155 0165 c Q115 d U145 a U110 b Check probe as shown in Probe Check following this troubleshooting table Excessive Pulse Aberrations or If CHECK indicates a pro blem examine the following components and replace if necessary a F402 F406 b U410 c Q155 Q166 d R403 R407 a Set per step B in Adjustments procedure Section 6 a Adjust per step C2 in Adjustments proc
18. I I I I 8 UT N DC FEEDBACK TO Riel DIAG VOLTAGE amp WAVEFORM CONDITIONS PARTIAL A AMPLIFIER BOARD 2052 34 REV C 1979 AM 5O3 Su E 1 _ gt A ME gt T NOTES DOTS INDICATES A CONTACTS ARE CLOSED AND B CONTACTS OPEN 2 A CONTACTS ON THE ls 2 SIDE THE BOARD 3 SWITCH SHOWN IN ImA POSITION 22222 COUPLING e 02 2 WER 52008 CAL DC LEVEL 4 l I I 16 5 R232 200 am R234 LL 620 C234 22uF Reis 50s TERM A A Q230A 8236 20 0 ATTENUATED AC SIGNAL 8 Q320 DIAG Loos 100 5 I I I I I I I I I I I I I I I I I i I e Px 2 I I I I I I I I I l l I I i B C218 18 D222 0 22 AF OR EARLIER E 20 0 NUMBER coda 4 OUTLINED lt ee aF CR226 R244 ATTENUATOR YHOLVANNALLY
19. Monitor Oscilloscope Volts Div 50 mV Time Div 10 us Triggering ext s Set the function generator Amplitude control for a six division display t Decrease the frequency of the function generator until the display is reduced to 4 2 divisions u Check that the function generator frequency is not more than 7 Hz 5 DC Level and Balance Set the following controls as indicated AM 503 Current Div 1 LLIII Coupling Cal DC Monitor Oscilloscope Volts Div 10 mV Time Div 10 us Triggering ext 2 9 Specification and Performance Check AM 503 a Set monitor oscilloscope input coupling to gnd Position trace vertically at the center of the CRT b Reset monitor oscilloscope input coupling to DC NOTE If the trace has moved from the gnd setting there is an offset problem with the monitor oscilloscope c Using a 50 Q cable and a 50 Q feed through ter minator connect the AM 503 OUTPUT to the input of the monitor oscilloscope 2 10 d Reset the AM 503 coupling to DC e Adjust the front panel balance so there is a minimal shift on monitor oscilloscope trace between the Cal DG Level position and the DC position on the AM 503 f Remove test set up This complete the performance check JUL 1980 WARNING THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID PERSONAL INJURY DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED
20. connect the calibration generator fast rise output to the AM 503 INPUT b Using a 50 Q cable and a 50 Q termination connect the AM 503 OUTPUT to the monitor oscilloscope input c Adjust the calibration generator pulse amplitude for a six division display d Set the monitor oscilloscope time div to 20 ns REV B JUL 1980 Adjustment AM 503 2052 42 Fig 3 3 Gain and compensation adjustment locations Examine front corner of waveform for correct compensation ignore long term roll off caused by L202 f Adjust R364 R345 C363 and R363 for optimum compensation g Refer to Fig 3 4 for example a 4 2052 44 Fig 3 4 Example of correct compensation REV JAN 1983 NOTE compensation adjustments are made it is necessary to re check the bandwiaths of the instru ment Refer to the RISE TIME BANDWIDTH proce dure in Section 2 Performance Check h Hemowve test connections Adjust Degauss Offset Signal Amplitude Set the following controls as indicated AM 503 CURRENT DIV Fully clockwise H136 Fully counterclockwise Coupling CAL DC LEVEL Monitor Oscilloscope Volts Div 10 mV Time Div 1 ms Triggering ext Input Coupling gnd Adjustment AM 503 a Connect a 50 Q coaxial cable from the AM 503 OUTPUT through a 50 Q termination to the monitor oscilloscope input b Position trace to the center graticule line using the monitor oscilloscope
21. it is important that the cause of overheating be corrected to prevent recurrence of the damage Lubrication Generally there no components in the AM 503 that require lubrication Pushbutton and Slide Switches The switches are lubricated prior to leaving the factory and should not require further lubrication However if they become electrically noisy cleaning and lubrication may solve the problem Cam Switches In most cases the factory lubrication of these switches is adequate for the life of the instrument The switch contacts are designed to operate dry If the switch has been disassembled for the replace ment of switch sub parts a lubrication kit containing the necessary lubricating materials and instructions is available through any Tektronix Field Office Order Tektronix Part No 003 0342 01 General Electric Ver silube G 322L silicone grease may be applied sparingly so that the lubricant does not get on the contacts Refer to Fig 4 1 for lubrication instructions CORRECTIVE MAINTENANCE Corrective maintenance consists of component replacement and instrument repair Special techniques required to replace components in this instrument are given here Obtaining Replacement Parts Most electrical and mechanical parts can be obtained through your local Tektronix Field Office or represen tative However you should be able to obtain many the 4 1 Maintenance AM 503 standard electronic compon
22. p p stalled with probe connected b 2155 Q165 c Q115 0145 0135 0130 6 Press release 0110 DEGAUSS button and b Check probe set level at P202 to zero volt with BALANCE control Voltage at P202 should be 20 mV p p with 40 mA into 0 1X probe e g P6302 7 Set Coupling to CAL a Q230 DC LEVEL adjust DC b 9360 LEVEL control for c Q385 zero volt out of d Q390 OUTPUT connector e Q395 and check bias f U370 voltages on schematics g U350 2 and 3 h Q310 Q310 i Q315 Q325 Table 4 2 cont TROUBLESHOOTING A TROUBLE SYMPTOM No signal at OUTPUT connector cont 8 Rotate CURRENT a DIV throughout its full b R208 range and note that c R210 there is no sudden loss d R212 of signal at e R214 OUTPUT connector B TROUBLE SYMPTOM Unable to zero output level with Coupling in CAL DC LEVEL If CHECK indicates a pro blem examine the following components and replace if necessary F402 F406 R403 R407 U410 0155 0166 0230 0360 0385 0390 0395 f 0370 g 0350 0310 0320 0315 0325 3 302 adjusts 302 between 15 b R300 R304 volts with no sudden discontinuities CHECK 1 16 V Supply gt 2 Check bias voltages on schematics 2 and 3 o o o o C TROUBLE SYMPTOM Unableto set signal at OUTPUT to zero with BALANCE control If CHECK indicat
23. 00 B070000 RES VAR NONWW 1K OHM 0 5W M58635 R407 315 0101 00 B063181 RES FXD CMPSN 100 OHM 5 0 25W M52308 370 260 1833 00 B055859 SWITCH SLIDE DPDT 0 5A 125V M46477 2 21 86 Change Reference Page 3 of 6 C9 0286 4 C9 0286 Change Reference 2 21 86 Date 503 Current Probe Amplifier Product DESCRIPTION Diagram Changes R14 R189 ae Gem 2 ey 1 380 7 X i 386 8122 CRIS RIBE cs 819 A jeus 1 pon jJ 3 82 12 97 SZ be EZ 22 02 amp 9 S bh Fl I 6 87 2 92 GZ OF 8 9 S ti I Ol 6 Fig 7 1 1 Amplifier circuit board component locations Page 4 of 6 DESCRIPTION Diagram Changes cont Partial Diagram 4 Partial Diagram gt Q230A Lovet dao s lt OVERLOAD 4 R236 20 0 ATTENUATED AC SIGNAL TO Q320 Di AG Partial Diagram 3 ICV gt Call 4 14F CR226 395 5 of 6 DESCRIPTION Replaceable Mechanical Parts List Changes ADD Fig amp Index Tektronix Serial Modei No No Part No _Dscont Qty 12345 amp Description Reference 214 2593 00 B063181 1 HEAT SINK XSTR TO 5 AL M51712 CHANGE TO 1 54 211 0244 00 2 SCR ASSEM WSHR 4 40 X 0 312 P
24. 0097 00 RES FXD FILM 100 0IM 1X 0 125M IC I10 91637 CMF55116G100ROF 8384 301 0681 00 RES 680 52 0 5 01121 6815 0386 321 0068 00 RES FXD FILM 49 9 0HM 0 52 0 125N 91637 CMF55116G49R90F 0387 321 0306 00 RES FXD F1LM 15 0K 12 0 125 TC TO 19701 5033ED15J00F R388 315 0822 00 RES FXD F1LM 8 2K 0HM 52 0 25N 19701 59043 8 200 R390 322 0212 00 RES FILM 1 5 K 0H4 12 0 258 TC TO 75042 CEBTO 1581F R391 321 0068 00 8010100 8020286 RES FILN 49 9 0MM 0 5X 0 125M IC 0 9163 55116049890 R391 321 0066 00 8020287 RES FILM 47 5 0H4 0 52 0 125N TCZTO 91637 55116647850 392 315 0122 00 RES FXD FIUM 1 2K OHM 52 0 25N 57668 NTR25J E01K2 REV DEC 1965 6 7 Electrical Parts AM 503 Replaceable Electrical Parts AM 503 Tektronix Serial Assembly No Mfr Component Part Effective Dscont Name 8 Description Code Mfr Part R393 315 0470 00 RES FXD FILM 47 5 0 25 57668 NTR2SJ 4760 R394 321 0135 00 RES FXD FILM 249 0HM 1X 0 125M TC TO 07716 CERD249ROF R395 323 0183 00 RES FXO FILM 787 OHH 1Z 0 5M TC T0 19701 5053R0787ROF R396 315 0391 00 RES FXD FILM 390 0HM 5X 0 25M 57668 NTR25J C390E R397 315 0151 00 RES FXO FILM 150 5 0 25 57668 NTR25J E150E 8398 315 0511 00 8010100 8054926 RES FXD FILM 510 52 0 25 19701 5043 51080 R398 301 0361 00 8054927 RES FXD FILM 360 5 0 5 19
25. 4F R156 5H R158 5H R159 5H R160 5H R162 4H R166 4H R168 4H R169 5G R172 5E R175 5C R176 5C R181 4c R182 5C R183 5C R189 4 R202 3G R220 R222 3A R224 3A R232 1A R234 2A R236 2B R242 1A R244 2A R246 3B R300 1B R304 1B R306 2B R308 2B R311 2B R312 2B R313 2C GRID NO LOC 8314 28 8315 1A R317 2B R321 2C R323 2C 8326 1C R327 1 R328 1 R330 1C R332 2C R334 2 R335 R336 3C R338 R340 R344 2C R345 2 R346 1C R347 1 R349 1 R351 1C R352 2D 833 10 R354 2D R355 1D 8356 2D R357 2D R358 2 R360 8361 8362 2F R363 3D R364 2D R365 2D R366 2D R367 1D R368 1E R370 16 R372 1D R373 R374 10 8376 2E R377 2E R380 16 8382 1E R383 2E R384 26 R386 26 R387 2 R388 3E 8390 1F 391 2 8392 1F R393 20 8394 2 8395 2F R396 1 8397 2 8398 2 8399 R403 2 CKT NO R404 R405 R406 R407 R412 R414 R415 R416 R422 R432 R436 R442 R446 R452 R454 R458 R462 R464 R480 RT135 RT156 RT160 RT342 S125 S200A U110 U135 0145 U350 U370 U410 VR100 VR103 VR166 VR167 VR172 VR380 VR452 VR462 W452 W462 GRID LOC 2G 2G 1G 1H 3H 2G 2G 1G 1H 2G 3G 1G 1G 3H 3H 3 2H 2H 4B 5H 4H 3C 5A 5 48 5L 2C 2D 2G 5D 5G 5G 5G 4D 2F 3H 3H 3H 3H I dq t CONDITIONS USED TO MEASURE DC VOLTAGES ON SCHEMATICS
26. FET Q130 is biased off and the oscillator circuit is not operating When DEGAUSS switch S125 is depressed it dis charges C126 which turns on Q130 The Q130 drain to source resistance in series with the parallel combination of R130 RT135 increases the gain of 0135 causing the circuit to oscillate The RC network R138 C138 R137 C137 applies positive feedback to U135 non inverting input and sets the frequency of oscillation at approximate ly 160 Hz The oscillator U135 output amplitude is limited by an AGC circuit composed of CR133 C133 R132 and R133 The oscillator output is rectified by CR133 and filtered by C133 This negative voltage is applied through R132 to Q130 gate to control its drain to source resistance and maintain the oscillator output at a constant level as long as the DEGAUSS is held pressed Oscillator output reaches U145 via R140 When the DEGAUSS switch is released Q130 remains biased on for approximately 0 5 second by 127 126 time constant As Q130 drain to source resistance in creases as Q130 goes toward cutoff the oscillator output amplitude decays degaussing the probe core Power Amplifier This circuit consists of U145 Q155 Q165 VR166 VR167 CR167 CR168 and associated components in cluding the degauss offset control R152 The 160Hz degaussing signal from 0135 low frequency input signal is applied to pin 2 of U145 Degaussing offset R152 adjusts the offset at J160 of
27. INCLUDES 131 0963 00 1 CONTACT ELEC GROUNDING BRZ W BRACKET TK0507 ORDER BY OESCR 56 Sees 7 ATTEN TERM SEE R204 R206 R208 R210 R212 8214 AND 216 REPL 57 344 0248 0900 7 ATTENUATOR 0 866 L CU BE 80009 344 0248 00 263 1111 00 1 AS CURRENT OTV 80009 263 1111 00 ATTACHING PARTS 58 211 0116 00 8 SCR ASSEM NSHR 4 40 X 0 312 PNH BRS 01 77900 ORDER BY DESCR END ATTACHING PARTS ACTR ASSEMBLY INCLUDES 59 200 1950 00 1 COVER 5 7 amp 31 ELEMENTS 80009 200 1950 00 ATTACHING PARTS 50 211 0244 00 8 5 ASSEM NSHR 4 40 X 0 312 PNH STL 01536 ORDER BY OESCR ATTACHING PARTS 61 131 0963 00 1 ELEC GROUND ING BRZ W BRACKET 0507 ORDER BY DESCR 62 210 0406 00 3 NUT PLAIN HEX 4 40 X 0 188 8RS CO PL 73783 12161 50 53 214 1139 03 2 SPRING FLAT 0 885 X 0 156 CU RED CLR 80009 214 1139 03 64 214 1752 00 2 ROLLER OETENT 0 125 00 X 0 16 55 80009 214 1752 00 55 401 0180 00 1 SW FR 8 RERR 0 8 amp 0 83 DIA 80009 401 0180 00 ATTACHING PARTS 56 354 0390 00 1 RING RETRINING BASIC 0 0 0 37501 79136 5100 37 10 ATTACHING PARTS 67 105 0716 00 1 ACTUATOR 5M 0C 0C 80009 105 0716 00 68 384 0878 01 1 5 5 1 166 L X 0 288 00 OUTER CON 80009 384 0878 01 M ORIVER 59 210 0406 00 3 NUT PLAIN
28. METALLIC 0 126 00 X 0 205 L BRS 80009 210 0775 00 15 366 1669 00 1 KNO8 GY CUR DIV 0 489 10 X 0 72 00 X 0 79 H 80009 366 1669 00 213 0153 00 2 SETSCREM 5 40 X 0 125 STL BK 0 0 SKT 27238 ORDER BY DESCR 16 1 CONNECTOR RCPT SEE 4100 REPL 47 366 0215 05 1 KN08 GY FOR LEVER 0 375 H W RTNR SPR 80009 366 0215 05 18 366 0494 05 1 KN0B 6Y 0 127 10 X 0 5 0D X 0 531 H 80009 366 0494 05 213 0153 00 1 SETSCREN 5 40 X 0 125 STL BK 0 0 SKT 27238 ORDER BY DESCR 19 366 1559 00 1 PUSH BUTTON SIL GY 0 18 50 X 0 43 80009 366 1559 00 20 358 0301 02 1 BUSHING SLEEVE 0 16 10 X 0 205 00 X 0 125 L 80009 358 0301 02 21 426 1072 00 1 FRAME PUSH BTN SILVER GRAY PLSTC 80009 426 1072 00 22 1 RESISTOR VAR SEE 8302 REPL ATTACHING PARTS 23 210 0583 00 2 NUT PLAIN HEX 0 25 32 X 0 312 885 CD PL 73763 2 20319 402 24 210 0940 00 1 WASHER FLAT 0 25 ID X 0 375 00 X 0 02 STL 79807 ORDER BY DESCR 25 210 0046 00 1 WASHER LOCK 0 261 0 INTL O 018 THK STL 77900 1214 05 00 0544C END ATTACHING PARTS 26 359 0029 05 1 BSHG MACH THO 0 375 32 X 0 6 BRS 0 4384 80009 358 0029 05 ATTACHING PARTS 27 220 0495 00 1 NUT PLAIN HEX 0 375 32 X 0 438 845 0 PL 73743 ORDER BY DESCR 28 210 0978 00 1 WASHER FLAT 0 375I0 X 0 024THK STL 0 500 1232 ORDER BY DESCR 29 210 0012 00 1 WASHER LOCK 0 384 IO INTL 0 022 THK STL 77900 1220 02 00 0541C ATTACHING PARTS 30 933 2131 09 1 PANEL FRONT 80009 333 2131 00 31
29. MICROCKT LINEAR OPNL AMPL SEL 04713 1741 1 0135 156 0067 01 8056550 LINEAR OPNL AMPL CHECKED 04713 MC1741CP1DS 1145 156 0317 00 8010100 8049499 MICROCKT LINEAR OPNL AMPL 80009 156 0317 00 0145 156 0317 03 8049500 MICROCKT LINEAR OPNL AMPL SCREENED 2 TESTED 34371 42 2626 7 0350 155 0078 11 8010100 8033939 MICROCKT LINEAR SELECTED 80009 155 0078 11 50 155 0078 10 8033931 MICROCKT LINEAR VERTICAL AMPLIFIER ML 80009 155 0078 10 0370 155 0078 11 8010100 8033930 MICROCKT LINEAR SELECTED 80009 155 0078 11 U370 155 0078 10 8033931 MICROCKT LINERR VERTICAL AMPLIFIER ML 90009 155 0079 10 U410 156 0208 00 8010100 8049499 MICROCKT LINEAR DUAL RGLTR SEL 34333 568195 35018 0410 156 0208 01 8049500 MICROCKT LINERR DUAL TRKG RGLTR SCRN 90009 156 0208 01 VR100 152 0278 00 SEMICOND OVC O1 ZEN SI 3V 5 0 4N 00 7 04713 S1635009K20 VMI4II3 157 0278 00 SEMICOND OVC 01 51 3 5 0 48 00 7 04713 SIG35009K20 VR166 152 0306 00 SEMICOND 90VC 01 7 M 51 9 1V 5X 0 4M 00 7 12954 1 9608 6 8 1965 Replaceable Electrical Parts AM 503 Tektronix Serial Assembly No M Part No IV nt Name amp cription Cod Part VR167 152 0306 00 8010100 8047648 SEMICOND 9VC 01 7 M 51 9 14V 5 0 4M 00 7 12954 1M9608 VR172 152 0278 00 SEMICOND OVC 01 ZEN 51 3 52 0 4 00 7 04713 351635009 20 VR187 152 0226 00 8010100 8020286 SEMICOND OVC 01 ZEN SI 5 1V 5 0 4N
30. NUMBER RANGES OF PARTS OUTLINED OM DEPICTED IN GREY NOTE OPTION NOT ASSIGNED AT THIS DATE POWER SUPPLY 5 H3MOd 44 Section 8 503 REPLACEABLE MECHANICAL PARTS 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 It is therefore important when ordering parts to include the following information in your order Part number instrument type or number serial number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your focal Tektronix Inc Field Office or representative 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 FIGURE AND INDEX NUMBERS Items in this section are referenced by figure and index numbers to the illustrations INDENTATION SYSTEM This mechanical parts list is indented to indicate item relationships Following is an example of the indentation system used in the description column 12345 Name amp Description A
31. Probe not connected to input Bandwidth set to full AC CAL DC Level DC set to CAL DC LEVEL Set voltage at output to zero volts into 50 ohms with DC Level control BALANCE DC FEEDBACK 52807 DIAG RIIS I PREAMP ALL DISCONNECT 5 v A ane x 1 RIO6 U 47 5K 2 CCII6 LL 2104 915 Decauss osc RIO2 AC IOK WITH PROBE OVED F ksaq s las DIAG 5125 233 p Rie che DEGAUSS IV 76 ake DEGAUS e AMPLITU AG Rize SIGNAL IK L M 0 CV i Rias DIAG 43K 0130 8130 0126 GAIN x im wd Rize RISB RTI35 3 3246 ae at p DIAG TIEM RIS 30 C 9 16V DEFLECTION SENSITIVITY LAMP DRIVERS w PARTIAL Al AMPLIFIER BOARD AM503 RE DC FEEDBACK 8129 RISI 1 18 499 4 99K 3 94H CI60 SIGNAL Y ML 166 THIS 1500 DIAG DEGAUSS OSC sige 49 5 INPUT RIeS gt S CI37 38137 IOK SEE PARTS LIST FOR EARLIER PISO VALUES AND SERIAL NUMBER Ig RANGES OE PARTS OUTLINED 05190 OR DEPICTED IN GREY 05192 B
32. a high internal current High currents may damage the diode A diode may be checked for an open or shorted condition by measuring the resistance between terminals With an ohmmeter scale having an internal source of between 800 mV and 3 V the resistance should be very high in one direction and very low when the leads are reversed Resistors Check the resistors with an ohmmeter Resistor tolerances are giveninthe Replaceable Electrical Parts list in every manual Resistors do not normally need to be replaced unless the measured value varies widely from the specified value Capacitors A leaky or shorted capacitor can be detected by checking resistance with an ohmmeter onthe highest scale Use an ohmmeter which will not exceed the voltage rating of the capacitor The resistance reading should be high after initial charge of the capacitor An open capacitor can best be detected with a capacity meter or by checking whether it passes AC signals Power Supply II incorrect operation of the power supply is suspected first check that the power module line selector block is in the correct position see Power Module Instruction Manual Use a dc voltmeter to check each supply voltage and check ripple with a test os cilloscope Voltages are measured between the power supply test points and chassis ground Power supply test points are shown in the Calibration section of the manual Check that each power supply is within the tolerance given in T
33. attenuator also includes a source follower Q230A and B that isolates the attenuator output from the X2 Gain Amplifier on the Output Amplifier block diagram 5 1 Circuit Description AM 503 Output Amplifier The X2 Gain Amplifier provides gain and a means of setting the output amplifier dc level front panel DC LEVEL control The selectable gain amplifier provides a choice between two gains one gain for the 1X probe and another for the 10X probe The selectable bandwidth amplifier provides a choice of full bandwidth 100 MHz for the AM 503 or bandwidth limited to 5 MHz The bandwidth is selected by BAND WIDTH switch 370 The output amplifier provides current drive to the OUTPUT INTO 50 0 connector 4390 It also provides via S200A 5X attenuation in the 50 mA to 50 A CURRENT DIV switch positions Power Supply The power supply provides four regulated voltages 16 16 19 3 and 19 3 V to the AM 503 Detailed Circuit Description Circuits unique to this instrument are described in detail in this discussion Complete schematic diagrams are located in the Diagrams section of this manual Refer to these schematics throughout the following circuit description The number inside the diamond after a heading refers to the schematic diagram for that circuit DC AMPLIFIER Deflection Sensitivity Lamp Drivers This circuit consists of Q180 Q185 VR187 05190 DS192 and associated components One of the two
34. connector mates with the interconnecting pin soldered into the board COAXIAL TYPE LEAD END CONNECTORS Replacement of the coaxial type lead end connectors requires special tools and techniques only experienced maintenance personnel should attempt to remove and replace these connectors It is recommended that the cable be replaced as a unit For cable part numbers see Replaceable Mechanical Parts list An alternative solution is to refer the replacement of the defective connector to your local Tektronix Field Office or representative LEAD END PIN CONNECTORS The pin connectors used to connect the wires to the interconnecting pins are clamped to the ends of the associated leads To remove and replace a damaged lead end connector remove the old pin connector from the lead and clamp the replace ment connector to the lead If the lead end connectors become dislodged from the plastic holder they can be re installed as follows see Fig 4 3 1 Bend grooved portion of holder part nearest cable away from cable in the direction of its hinged side 2 Re insert terminal connector into its proper hole in the holder and bend the grooved part of the holder backto its vertical position so connector s fit into groove Some of the pin connectors are grouped together and mounted in a plastic holder the result is that these connectors are removed and installed as a multi pin connector To provide correct orientation of this multi pin conn
35. following test equipment or equivalent is required to perform the performance check Test equipment characteristics listed are the minimum required to verify the performance of the equipment under test Substitute equipment must meet or exceed the stated requirements All test equipment is assumed to be operating within tolerances 2 3 Specification and Performance Check AM 503 Special test devices are used where necessary to facilitate the procedure Most of these are available from Description 1 Test Oscilloscope 2 Power Module TM 500 Series 3 Digital Voltmeter 4 Calibration Generator 5 Constant Amplitude Sine Wave Generator Table 2 4 Tektronix Inc and can be ordered through your local Tektronix Field Office or representative LIST OF TEST EQUIPMENT REQUIREMENTS Minimum Specifications Bandwidth dc to 150 MHz minimum vertical deflection 5 mV Div minimum Time Div 2 ns All amplifier output measurements Provide power to AM 503 and test equipment Ranges ac rms 0 200 mV Dynamic range 0 2 V Accuracy 0 5 1 count at 1 kHz Amplitude Calibrator and two pulse modes High Amplitude and Fast Rise Amplitude Calibrator Amplitude to 5 V into 50 Q period approx 1 ms Noise Rise Time Bandwidth High Amplitude Output Period 1 us to 10 ms duty cycle approx 50 amplitude range 0 5 Vorless
36. mV of noise k Set the AM 503 CURRENT DIV to 2 mA Check using the procedure in part i for amaximum of 4 mV of noise m Set AM 503 CURRENT DIV to 5 mA n Repeat parts b through i 2 8 o Check for a maximum of 0 8 mV of noise p Repeat parts n and o for all remaining settings of the AM 503 CURRENT DIV control NOTE At 20 mV Div with monitor oscilloscope go to High Amplitude Output on Calibration generator Remove 10X attenuator on 0 1 A setting Remove last 10X attenuator on 1 0 A setting 4 Check Rise Time Bandwidth Set the following controls as indicated AM 503 CURRENT DIV 20 mA BANDWIDTH FULL Coupling DC Calibration Generator Mode Fast Rise Period 1 Amplitude Minimum Monitor Oscilloscope Volts Div 10 mV Bandwidth Full Time Div 02 us Magnifier X10 Triggering ext a Using the 50 Q cable and 50 Q termination connect the AM 503 OUTPUT to the input of the monitor os cilloscope b Using the special adapter and a 50 Q cable connect the calibration generator Fast Rise Output to the AM 503 INPUT c Set the display amplitude to five divisions using the calibration generator Pulse Amplitude control d Set the test oscilloscope to Internal Triggering and using the Triggering Level and horizontal Position con trols obtain a display of the waveform leading edge e Measure the rise time 10 90 point f Check that the rise time is 3 5 ns or less REV A JUL 198
37. 0 g Disconnect the calibration generator from the special adapter h Connect the sine wave generator Output to the special adapter i Set the following controls as indicated AM 503 CURRENT DIV 5 mA BANDWIDTH FULL Coupling DC Leveled Sine Wave Generator Frequency Range MHz REF 350 kHz Amplitude Multiplier X 01 Output Amplitude 3 0 Monitor Oscilloscope Volts Div 10 mV Time Div 50 us Triggering ext j Adjust the Output Amplitude control of the sine wave generator for a six division display k Increase the frequency of the sine wave generator until the display is reduced to 4 2 divisions Check that the sine wave generator frequency is at least 100 MHz m Change the following controls as indicated AM 503 BANDWIDTH 5 MHz Sine Wave Generator Frequency Range Ref 350 kHz n Adjust Output Amplitude of the sine wave generator for a six division display o Increase the frequency of the sine wave generator until the display amplitude is reduced to 4 2 divisions REV NOV 1981 Specification and Performance Check AM 503 p Check that the sine wave generator frequency is at least 4 MHz and not more than 6 MHz q Disconnect the cable from the Output of the sine wave generator and connecttothe Output of the function generator r Set the following controls as indicated AM 503 CURRENT DIV 20 BANDWIDTH 5 MHz Coupling Function Generator Frequency 1 ML17 Amplitude Minimum
38. 0 315 0101 00 RES FILM 100 OHM 5 0 25M 57668 NTR25J E 1006 R302 311 0546 00 8010100 8050202 RES VAR NONWM 10K 0 5 01121 81544 R302 311 0429 00 8050203 RES VAR NONMM PNL 100K X 10K 0 0 5 12697 433098 R304 315 0101 00 RES FXD FILM 100 OHM 5X 0 25M 57668 NTR25J E 1006 R306 321 0243 00 8010100 8029999 RES FILM 3 32K OHM 12 0 125 TCz TO 19701 5033 03 2 R306 321 0279 00 8030000 RES FILM 7 87K OHM 12 0 125M TC TO 07716 CE 078700F R308 321 0032 00 8010100 8029939 RES F1LM 21 0 0HM 1X 0 125N TC TO 57668 RB14FXE 2160 R308 321 0068 00 8030000 RES FXD FIUM 49 9 0HM 0 52 0 1258 TC TO 91637 CMf55116G49R90F R311 322 0172 00 8030000 RES FXO FILM 604 OHM 12 0 25M TC TO 75042 CEBTO 6040F R312 321 0111 00 RES FILM 140 OHM 1 0 125N TC T0 07716 _ CERDT140ROF R313 315 0151 00 8010100 8029999 5 150 OHM 5X 0 25M 57668 NTR25J E150E 8313 321 0068 00 8030000 RES FXO 49 9 0 5 0 125 0 91637 55116049890 8314 321 0111 00 RES 140 OHM 12 0 125N TC TO 07716 CEAD140R0F 8315 308 0553 00 RES FXD NM 680 OHM 1 TC 20PPM 05347 53 680 F R31 321 0010 00 8010100 8029999 RES FILM 12 4 12 0 125 TC TO 57668 RBI4FXE 1268 8317 321 0068 00 8030000 RES FILM 49 9 0HM 0 52 0 125M TC TO 91637 CMF55116G49R90F R321 322 0172 00 8030000 RES FXD F1LM 604
39. 00 7 04713 521226281 VR380 152 0278 00 SEMICOND DVC DI IEN SI 3V 5X 0 4I 00 7 04713 S1635009K VR452 152 0304 00 8010100 8029999 SEMICOND OVC 01 7 51 20 5 0 40 00 7 45238 75414 VR452 152 0680 00 8030000 SEMICOND DVC D1 2EN SI1 19 3V 13 0 4N 04713 516266 VR462 152 0304 00 8010100 B029999 SEMICOND DVC DI IEN SI 20V 5 X 0 4M 00 7 45238 158411 VR462 152 0680 00 B030000 SEMICOND DVC 01 2EN S1 19 3V 13 0 4M 04713 526266 W452 131 0566 00 8030000 8047648 BUS COND DUMMY RES 0 094 0D X 0 225 L 24546 07 M462 131 0566 00 8030000 8047648 BUS COND DUMMY RES 0 094 00 X 0 225 24546 07 REV DEC 1985 6 9 Section 7 AM503 DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols and Reference Designators Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors Values or greater are in picofarads Values less than one are microfarads uF Resistors Ohms 52 Graphic symbols and class designation letters are based on ANSI Standard Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data The overline on a signal name indicates that the signal performs its intended function when it goes to the low state Abbreviations are based on ANSI Y1 1 1972 Other ANSI standards that are used in the preparation of diagrams by Tektronix Inc are
40. 00 8010100 8020286 RES FXO FIUM 5 1K 0HM 52 0 25M 97668 NTR25J E05K1 R189 302 0271 00 RES CM05M 270 10 0 5 01121 EB 2711 8202 321 0040 00 RES FXD FILM 25 5 12 0 125 0 91637 55116625850 R204 307 1040 00 TERM THK FILM 50 OHM 80009 307 1040 00 R206 307 1020 00 ATTENUATOR FX0 2X 50 OHM 80009 307 1020 00 8208 307 1020 00 ATTENUATOR FXD 2X 50 OHM 80009 307 1020 00 R210 307 1023 00 ATTENUATOR 5 50 OHM 80009 307 1023 00 R212 307 1024 00 ATTENUATOR 10X 50 OHM 80009 307 1024 00 R214 307 1024 00 ATTENUATOR 10 50 OHM 80009 307 1024 00 R216 307 1040 00 TERM THK FILM 50 OHM 80009 307 1040 00 R220 315 0102 00 RES FXO IIM 1M 52 0 25 57668 NTR25JE01K0 R222 315 0203 00 8010100 8032319 RES FXO FILM 20K 52 0 25 57668 NTR25J E 20K R222 315 0164 00 8032320 RES FXO FILM 160K OHM 5 0 25 57668 NTR25J E160K R224 315 0101 00 RES FXO FILM 100 OHM 5 0 25 57668 NTR25j E 1006 9232 315 0201 00 RES FXO FILM 200 5 0 25 57668 NTR25J E200E R234 315 0624 00 RES FXO FILM 620 5 0 25 57668 NTR25J E620E R236 321 0030 00 RES FXO FILM 20 0 OHM 1 0 1251 lt 57668 CRB14FXE 20 R242 315 0201 00 RES FXD FILM 200 5 0 25 57668 NTR25J E200E 0244 315 0621 00 RES FXD FIUM 620 5 0 25M 57668 NTR25J E520E 8246 321 0030 00 RES FXD FILM 20 0 OHM 12 0 125M 0 57668 CI814 XC 20 R30
41. 0385 00 2 SPACER PB SW 0 164 L GREEN POLYCARBONATE 80003 361 0385 00 93 136 0252 0 108 50 CONN W O DIMPLE 22526 75060 012 84 131 0608 00 39 TERMINAL PIN 0 365 L X 0 025 BRZ GLD PL 22526 48283 036 85 131 1003 00 4 CONN ELEC CKT 80 MT 3 PRONG 80009 131 1003 00 86 344 0255 00 4 CLIP ELECTRICAL FUSE CKT 80 MT CU 80009 344 0255 00 87 343 0149 00 2 STRAP 6 75 L PLASTIC 06383 ORDER BY DESCR 88 214 4797 00 44 CLIP 80009 214 1797 00 99 2 TRANSISTOR SEE 0155 AND 0165 REPL ATTACHING PARTS 90 211 0001 00 2 5 MACHINE 2 56 X 0 25 PNH STL 83385 ORDER BY OESCR 91 220 0627 00 2 NUT PLAIN HEX 2 56 X 0 156 HEX BRS NP 73743 10002 56 101 210 0801 01 1 MASHER FLAT 0 14 IO X 0 025 THK STL NP 86928 ORDER BY OESCR 92 210 0001 00 2 MASHER LOCK 2 INTL 0 013 THK STL 77900 1202 00 00 0541C 93 210 1156 00 2 WASHER SHLOR 0 0910 X 0 200 X0 0850 MVL 80009 210 1156 00 ATTACHING PARTS 94 342 0166 00 2 INSULATOR PLATE TRANSISTOR MICA 80009 342 0166 00 95 214 2407 00 1 SINK XSTR 2 0 125 0 141 DIA HOLES 80009 214 2407 00 ATTACHING PARTS 96 211 0097 00 4 SCREW MACHINE 4 40 X 0 312 PNH STL TK0435 OROER BY DESCR 9 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CO PL 8189 211 041800 00 END ATTACHING PARTS 136 0514 00 8010100 8056553 1 SKT PL IN ELEK MICROCIRCUIT 8 DIP 09922 01188 108
42. 1 4195 x PROBE SELECT T OPTION ONLY GY EFFECTIVE FOR SN BOIOZ 87 BELOW 211 25 2052 33 REV MAR 1964 DC AMPLIFIER u3ldtldiNV COMPONENT LOCATIONS AMPLIFIER BOARD SN B030829 amp BELOW 503 T imi y at SS hea 640350 r gt eGR 35381 22 vie I 3 4 R384 yu ES D gt 55 3 Pa w p E EET LV ants 2 238317 R360 b J 2 IE miu e 7 See Parts List for serial number ranges Fig 7 2 A1 Amplifier circuit board witl Located on back of board CKT GRID CKT GRID CKT GRID CKT GRID CKT GRID CKT GRID CKT GRID NO LOC NO LOC NO LOC NO LOC NO LOC NO LOC NO LOC C100 5D C160 4H C323 2 C393 1D CR127 5A J110 5D L380 2E C108 5E C165 Al C328 2C C394 2F CR133 5B J120 5F L383 2E C110 4E C168 4H C345 2 C396 1F CR167 5G J160 4H C112 5E C172 4D C351 2D C398 2E CR175 5D J168 5G P302 1B C124 5E C176 5C C360 C402 3l CR226 2A J190 4C P370 1E C125 4G C187 4D C363 3D C406 2 CR320 28 2195 5C P380t C133 4A C218 t C364 2D C413 2G CR380 2E J202 3G Q115 56 C137 220 38 C365 20 C414 2C CR383 2E J346 1C 0130 4A C138 5B C232 2A C366 2D ca23 2G CR386 2F J380 3F 0155 5 C140 4B _ C234 2A C367 1D C434 3G CR402 3 J470 4 0165 4 C146 4F C242 2A C380 2D C436 3G CR
43. 10 78 04713 SRF572 0315 151 0188 00 TRANSISTOR PNP S1 16 92 80009 151 0188 00 0320 153 0609 00 8010100 8029999 SEMICOND DVC SE MATCHED PAIR 80009 153 0609 00 0325 151 0188 00 TRANSISTOR PNP 51 10 92 80009 151 0188 00 0360 151 0190 00 TRANSISTOR NPN SI TO0 92 80009 151 0190 00 0385 151 0188 00 TRANSISTOR PNP 51 10 92 80009 151 0188 00 0390 151 0190 00 TRANSISTOR NPN SI 10 92 80009 151 0190 00 0395 151 0188 00 TRANSISTOR PNP 51 10 92 80009 151 0188 00 0440 151 0347 00 8020000 TRANS 15708 51 10 92 04743 SPS7951 Q450 151 0190 00 TRANSISTOR NPN S1 10 92 80009 151 0190 00 0460 151 0188 00 TRANSISTOR PNP 51 10 92 80009 151 0188 00 0470 151 0350 00 8020000 TRANSISTOR PNP S1 10 92 04713 SPS6700 R100 308 0243 00 RES FXD WW 240 5 14193 5031 2400 R102 315 0103 00 RES FXD FILM 40K OHM 5 0 25 19701 5063 10 00 R103 315 0102 00 RES FILM 1K OHM 5 0 251 57668 NTR25JE01K0 R104 321 0162 00 RES FXO FILM 475 OHM 1 0 1250 0 19701 5033 047580 R105 321 0162 00 RES FILM 475 OHM 1 0 125M IC 10 19701 5033 047500 R106 321 0354 00 RES FILM 47 5K OHM 1 0 1258 TC TO 19701 5043 047 50 R108 315 0100 00 RES FILM 10 OHM 5 0 25M 19701 5043CX10M08 R110 315 0100 00 RES FXD FILM 10 0HM 52 0 25N 19701 5043CX10RROOJ R142 315 0102 00 RES FILM 0HM 52 0 258 57668 NTR25JE01KO R113 321 0354 00 RES FILM 47 5K 0MM 1X 0 1254
44. 135 321 0227 00 8063101 RES FXO FILM 2 26K 1 0 1258 lt 0 07716 C M022600L R136 311 1267 00 8010100 8047648 RES VAR 5K OHM 0 SH 32997 3329 158 502 R136 311 1264 00 8047649 RES VAR TRMR 1 5 OHM 0 54 32997 3329 158 152 R137 321 0289 00 RES FXD FILM 10 0K 0MM 1X 0 125M IC I0 19701 5033 010 0 R138 321 0431 00 RES FXD FIU 301K 0MM 1 1 1258 0 07716 CE 0D30102F R140 315 0821 00 RES FXD FILW 820 OHM 57 0 254 19701 5043CX820ROJ R142 315 0241 00 8010100 8029999 RES FXD FILM 240 52 0 25 19701 5043CX240R0J R145 321 0135 00 8010100 8019999 RES FILM 249 0MM 1X 0 125M IC I190 07716 CEAD249ROF R145 315 0241 00 8020000 RES FXD F1LM 240 5 0 25 19701 5043CX240R0J R146 315 0100 00 RES FXO FILM 10 52 0 25 19701 5043CX40RRO0J R148 315 0100 00 RES FXD FILUM 10 0MM 5X 0 25M 19701 5043CX10RR00J R150 315 0243 00 8010100 B029999 RES FILM 24K OHM 5X 0 25M 57668 NTR25J E24KO REV DEC 1985 6 5 Replaceable Electrical 503 Tektronix Serial Assembly No Mfr Component No _ Part No Effective Dscont Name amp Description Code Mfr Part R150 315 0123 00 8030000 RES FXD FTLM 12K 5 0 25 57668 NTR25J E12K0 R151 321 0260 00 RES FXO FILM 4 99K OHM 12 0 125 TC T0 19701 SO33ED4KSS0F R152 311 1271 00 RES VAR NONMW 0 5 32997 3329 158 503 R153 315 0243 00 8010100 8029999
45. 14 15 1966 Drafting Practices 14 2 1973 Line Conventions and Lettering 10 5 1968 Letter Symbols for Quantities Used in Electrical Science and Electrical Engineering The following prefix letters are used as reference designators to identify components or assemblies on the diagrams A Assembly separable or repairable H Heat dissipating device heat sink 5 Switch or contactor circuit board etc heat radiator etc T Attenuator fixed or variable HR Heater TC Thermocouple B Motor HY Hybrid circuit TP Test point BT Battery J Connector stationary portion U Assembly inseparable or non repairable C Capacitor fixed or variable K Relay integrated circuit etc CB Circuit breaker L Inductor fixed or variable V Electron tube CR Diode signal or rectifier M Meter VR Voltage regulator zener diode etc OL Delay line P Connector movable portion VV Wirestrap or cable DS Indicating device lamp Q Transistor or silicon controlied Y Crystal E Spark Gap Ferrite bead rectifier Z Phase shifter F Fuse R Resistor fixed or variable FL Filter RT Thermistor Plug to E C Board The following special symbols may appear on the diagrams Identifies Panel Strap or Link lt Controls Connectors and 5 BAL Indicators Cam Switch 12 V Modified Component Closure Chart ue Depicted in Grey or Dot indicates 10 IRIS With Grey Outline switch closure mV See Parts List 26 WIG di Des
46. 250 0 07716 CENn0140ROF R340 315 0121 00 RES FXO FILM 120 0HM 5X 0 25N 19701 5043CX120R0J R344 311 1260 00 RES VAR 250 0 5N 32997 3329 158 251 9345 311 1259 00 RES VAR 100 0 5 32997 3329 58 101 R346 311 1268 00 8010100 8047648 RES VAR TRMR 0 54 32997 3329 158 103 R346 311 1267 00 8047649 RES VOR NONWN OHM 0 5N 32997 3329 158 502 R347 315 0102 00 RES FXD FILM 1K OHM 57 0 25 57668 NTR25JE01K0 R349 321 0222 00 RES FXD FILM 2 00K OHM 1 0 1258 0 19701 5033 02 00 0351 315 0103 00 RES FXD FILM 10K 0484 52 0 25N 19701 5043CX10K00J R352 321 0173 00 RES 619 1X 0 125 0 07716 CEADG19ROF R353 322 0167 00 RES FXD F1LM 536 12 0 25 0 07716 CCAD536ROF R354 321 0068 00 RES FXD FILM 49 9 0HM 0 52 0 125N TC TO 91637 CMF55116G649R90F R355 322 0109 00 RES FILM 133 1X 0 25 70 91637 MFF1421G133R0F R356 321 0068 00 RES FXD F1LM 49 9 0M 0 5x 0 1258 70 91637 CMF55116G49R90F 357 321 0068 00 RES FXD FILM 49 9 0HM 0 52 0 125N TC TO 91637 JCMF55116G49R90F R358 321 0068 00 RES FXD FILM 49 9 0 5 0 1257 0 91637 CMF55116G49R90F 8360 321 0085 00 RES FXD FILM 5 1 0 1258 lt 57668 CRB844FXE 75 OHM R361 321 0085 00 RES FXD FILM 5 OHM 1Z 0 125W TC T0 57668 CR844FXE 75 OHM R362 301 0131 00 RE
47. 3 01 670 4353 02 670 4353 03 670 4353 04 670 4353 06 283 0204 00 283 0204 00 283 0204 00 283 0204 00 283 0204 00 283 0647 00 285 1097 00 283 0693 00 290 0525 00 283 0177 00 285 1050 00 283 0051 00 290 0536 00 283 0204 00 283 0204 00 283 0600 00 283 0676 00 290 0272 00 283 0204 00 283 0204 00 290 0272 00 283 0114 00 283 0204 00 283 0204 00 283 0204 00 283 0212 00 283 0339 00 283 0204 00 283 0204 00 290 0134 00 283 0204 00 290 0134 00 283 0204 00 283 0204 00 283 007 00 283 007 00 283 0204 00 283 0600 00 283 0615 00 283 0204 00 283 0204 00 283 0615 00 281 0158 00 283 0210 00 283 0639 00 283 0600 00 283 0212 00 283 0238 00 283 0268 00 283 0204 00 Serial Assembly No Effective B010100 B030000 B047649 8049500 8054927 8063181 8010100 8020000 8010100 8010100 8032320 8010100 8010100 8010100 8030000 8010100 8030000 8010100 8030000 8047649 8010100 8030000 8030000 8047649 8029999 8047648 8049499 8054926 8063180 8019999 8020286 8032319 8029999 8029999 8029999 8029999 8029999 8047648 8029999 8047648 Replaceable Electrical 503 Name Description SELECTED NOMINAL VALUE CIRCUIT BD ASSY MAIN PLUG IN CIRCUIT ASSY MAIN PLUG IN CIRCUIT BO ASSY MAIN PLUG IN CIRCUIT BO ASSY MAIN PLUG IN CIRCUIT BO ASSY MAIN PLUG IN CIRCUIT BD ASSY MAIN PLUG CAP FXD CER D1 0 01UF 204 50
48. 303 23 ns Random Noise AM 503 only 1st two cw positions of CURRENT DIV switch 4 mV BANDWIDTH Full coupling CAL t 1st tw iti f LEVEL dc level adjusted for zero out except 1st two positions o CURRENT DIV switch 0 8 mV Random Noise typical probes BANDWIDTH Full coupling in DC P6302 only lt 0 3 mA tangentially measured CURRENT DIV full cw DC LEVEL adjust ed for zero dc out P6303 only 3 mA tangentially measured Attenuator Accuracy Within 3 of indicated CURRENT DIV Page 1 of 6 DESCRIPTION Adjustment Procedure Changes Replace Fig 3 3 Fig 3 4 and steps d through h of part 3 Adjust Compensation with the new steps d through beginning on page 3 4 as follows Fig 3 3 Gain and compensation adjustment locations d Examine the long term waveform Adjust R366 for optimum compensation f Set the monitor oscilloscope TIME DIV to 20 ns g Examine the front corner of the waveform for correct compensation h Adjust R364 R345 C363 and R363 for optimum compensation Refer to Fig 3 4 for exampie NOTE If compensation adjustments are made it is neces sary to re check the bandwidths of the instrument Refer to the RISE TIME BANDWIDTH procedure in Section 2 Performance Check Fig 3 4 Example of correct compensation i Remove all test connections Page 2 of 6 Product 503 Current Probe Amplifier DESCRIPTION R
49. 31 5008331J 831 5008331J SR155E103MAA D105E430J0 D155E330J0 58155 103 00 58155 103 00 D155E330J0 518 006 G 7 45 300 100 78 562 0155 560 0 D105E430J0 58405 205 00 58155 203 00 3439 050 153 SR155E103MAA 6 3 Replaceable Electrical Parts AM 503 Component C380 C383 C385 C388 C391 C391 C393 C394 C396 C398 C402 C406 C413 C414 C423 C434 C436 C444 C446 C452 C462 CR103 CR445 CR116 CR127 CR133 CR158 CR156 CR16 CR168 CR1 5 CR226 CR320 CR380 CR383 386 CR402 CRA06 CR452 CR462 05190 05492 F402 F402 F406 F406 J100 J 160 J202 J380 9480 168 L202 1202 L380 L383 Q115 Q130 0155 6 4 283 0625 00 283 0600 00 283 0204 00 290 0517 00 283 0615 00 283 0773 00 281 0593 00 281 0626 00 283 0629 00 283 0204 00 290 0334 00 290 0334 00 283 0111 00 283 0177 00 283 0111 00 283 0204 00 283 0204 00 283 0204 00 283 0204 00 290 0782 00 290 0782 00 150 1001 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0585 00 150 1001 00 152 0141 02 152 0321 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0585 00 152 0585 00 152 0141 02 152 0141 02 150 0046 00 150 0046 00 159 0064 00 159 0107 00 159 0064 00 159 0107 00 131 1315 01 131 1003 00 131 1003 00 131 1003 00 131 1003 00 108 0245 00 108 0853 00 108 0200 00 108 0345 00 10
50. 406 1J J475 5J 0180 5 C148 5F C244 2B C383 2E C444 1G J480 5J 185 5C C153 4G C306 2B C385 2E C446 1G C402 t 3J Q230 38 C155 5H C308 2C C388 3E CR115 5 406 t 1J 1168 0310 2 156 5H C313 2 C391 2F 116 5F 1202 3G 0315 2 64450 02 r Wu iz ET mplifier circuit board with component locations of components SN B030829 amp below CKT GRID CKT GRID CKT GRID NO LOC LOC 0 LOC Q320 2 R106 R129 0325 2C R108 5E R130 48 Q360 3E R110 4C R132 4A Q385 2C R112 5E R133 4A O390 1E R113 5E R134 4B 0395 2C 8114 5C R136 5B Q440 2H R116 5E R137 58 _ 0450 3G R118 4 8138 58 0460 3C R121 4G R140 4B 0470 1H R122 5E R142 4B R100 4D R123 4G R145 5F R102 5D R124 5F R146 4F R103 5G R126 R148 5F R104 5D R127 4 R150 5F R105 5D R128 4A R151 5G C406 C402 CKT OCT 1979 GRID LOC 4F 5H 5H 5H 5H 4H 4H 4H 5G 5E 50 5C C 2 68404 ye P gt 406 402 F402 CKT yt GRID LOC 4C 5C 5C 4C 5C 4C 3C 3A 3A 1 28 14 2052 30 N R246 R300 R304 R306 R308 R311 R312 R313 R314 R315 R317 R321 R323 R326 GRID ras s r e a 18 18 28 28 28 28 2C 28 1 28 2C 2C 1C CKT R327 R328 R330 R332 R334 R335 R336 R338 R340 R344 R345 R346 R347 R349 R351 GRID
51. 5 to 10 Hz Vibrate 15 minutes in each of the three major axes at 0 015 total displacement Hold 10 minutes at any major resonance or if none at 55 Hz Total time 75 minutes Shock Non operating 30 g s 1 2 sine 11 ms duration 3 shocks in each direction along 3 major axes for a total of 18 shocks Transportation Category II Qualified under National Safe Transit Committee Test Procedure 1A Table 2 3 PHYSICAL CHARACTERISTICS Characteristics Maximum Overall Dimensions Height Width Length Front Panel Finish Net Weight Information 225 inches 12 7 2 6 inches 6 7 11 7 inches 29 8 cm Anodized aluminum 2 Ibs PERFORMANCE CHECK Introduction This procedure checks the electrical characteristics of the AM 503 that appear in the Specification section of this manual If the instrument fails to meet the requirements given in this performance check the adjustment procedure should be performed This procedure can also be used by an incoming inspection facility to determine acceptability of performance The electrical characteristics in Section 2 are valid only if the AM 503 is calibrated at an ambient temperature of 20 C to 30 C and operated at an ambient temperature of 0 C to 50 C REV B NOV 1979 Tolerances that are specified in this Performance Check procedure apply to the instrument under test and do not include test equipment error Test Equipment Required The
52. 5 212001 FUSE CARTRIDGE DIN 20 250VAC SLOM 71400 GDOC 2 FUSE CARTRIOGE DIN 14 2501 10SEC 75915 212001 FUSE CARTRIOGE DOIN 2A 250 0 SLOM 71400 606 28 CONN RCPT ELEC FEMALE 80009 131 1315 01 CONN RCPT ELEC CKT BD MT 3 PRONG 80009 131 1003 00 CONN RCPT ELEC CKT 80 MT 3 PRONG 80009 131 1003 00 CONN RCPT ELEC CKT 80 MT 3 PRONG 80009 131 1003 00 CONN RCPT ELEC CKT 80 MT 3 PRONG 80009 131 1003 00 CHOKE RF FIXED 3 9UH 76493 86310 1 COIL RF FIXED 48 7UH 89009 108 0853 00 COIL RF FIXED S2UH 80009 108 0200 00 COIL RF FIXED 1 89UH 80009 108 0345 00 COIL RF FIXED 1 89UH 80009 108 0345 00 TRANSISTOR FET N CHAON T0 106 04713 ORDER BY OESCR TRANSISTOR FET N CHAN T0 106 04713 ORDER BY DESCR TRANSISTOR NPN SI X 81 04713 SPS34140RMPSU45 REV DEC 1985 Replaceable Electrical Parts AM 503 Tektronix Serial Assembly No Mfr Component No Part No Effective Dscont Name amp Description Code Part No _ 0165 151 0391 00 TRANSISTOR PNP 51 81 04713 SPS6867K 0480 151 0254 00 8010100 8047648 TRANSISTOR DARLINGTON NPN S T 03508 X38L3118 0180 454 0190 00 8047649 515708 51 TO 92 80009 151 0190 00 0185 151 0190 00 TRANSISTOR NPN SI T0 92 80009 151 0190 00 Q230 151 1032 00 TRANSISTOR FE DUAL SI T0 78A 04713 5 01032 0310 153 0609 00 8010100 B029999 SEMICOND DVC SE MATCHED PAIR 80009 153 0609 00 0310 151 0451 00 8030000 TRANS ISTOR NPN 51
53. 701 5053CX360R0J R399 321 0078 01 RES FXD FILM 63 4 OHM 0 5 0 1250 TC TO 91637 551166638400 9403 317 0101 00 8010100 8063100 RES FXD CMPSN 100 OHM 5X 0 125 01121 881015 R403 315 0101 00 8063101 RES FXD FILM 100 OHM 5 0 257 57668 NTR25J E 1006 8504 321 0380 00 010100 8047648 RES FXD FILM 88 7K 14 0 125 0 07716 CE n088701F R404 321 038 00 8047649 RES FXD FILM 105K OHM 1 0 125 TC T0 07716 CE 010502F R405 311 1271 00 RES VAR SOK 0 5 32997 3329 158 503 R406 321 0377 00 8010100 8047648 RES FXD FILM 82 5K 12 0 125 07716 CE n082501F R406 321 0369 00 8047649 RES FXD FILM 68 1K 1 0 125 4 0 19701 5043ED68K10F 9407 317 0101 00 RES CMPSN 100 52 0 125 01121 881015 R412 308 0755 00 8010100 8019999 RES 0 75 55 284 75042 SWH R7500J 8412 308 0679 00 9020000 RES 0 51 5 2 75042 0 51 OHM 5 8414 321 0356 00 RES FXO FILM 49 9K 0 1 0 126 4 TC TO 19701 O 5033ED49K90F R415 311 1268 00 RES VAR 10K 0 5M 32997 3329 158 103 R416 321 0356 00 RES FXD FILM 49 9K OHM 15 0 1250 TC TO 19701 5033 049 90 8422 308 0755 00 8010100 8019999 RES FXD 0 75 5 2 75042 BNMH R7500J R422 308 0679 00 8020000 RES FXD NN 0 51 OHM 5Z 2M 75042 BHH 0 51 OHM 5 R432 307 0103 00 RES CMPSN 2 7 5 0 25 01121 82765 R436 315 0100 00 RE
54. 8 0345 00 151 1059 00 151 1059 00 151 0390 00 Serial Assembly No Dscont Effective 8010100 8047649 8030000 8030000 8020000 8020000 B010100 8020000 8010100 8020000 8010100 8047649 8047648 8029999 8029999 8019999 8019999 8047648 amp Description Code Part No CAP FXO MICA 01 220 1 500 00853 0105F221F0 FXO MICA 01 43 5 500V 00953 0105 430 0 CAP 01 0 01UF 202 50V 04222 SR155E103MAA CAP FXO ELCTLT 6 8UF 20 35 0539 3688685 036507 CAP FXO MICA 01 33 5 500 00853 0155 330J0 CAP FXO 01 27 2 500V 00853 0155 27060 CAP FXO 01 3 9PF 0 25PF 500V 59660 301 080 C0J0399C FXO CER 01 3 3PF 0 1PF 500V 59660 301 000 0 0 3398 X0 MIC 01 62 1 500 00853 0105 620 0 CAP FXO CER 01 0 01UF 20X 50V 04222 58155 103 00 FXO ELCTLT 1250UF 75 10 50V 56289 530282 FXO ELCTLT 1250UF 75 10 50 56289 530282 CAP FXO CER OF 0 1UF 20 50 05397 C330C104M5U1CA OI 1UF 80 20 25V 04222 583026105700 01 0 1UF 20 50V 05397 C330C104M5U1CA 01 0 01UF 20 50V 04222 SR155E103MAA CAP FXO CER 01 0 01UF 20 50V 04222 SR155E103MHA FXO CER DI 0 04UF 20 50V 04222 SR155 103MAA CAP FXO CER 01 0 01UF 20 50V 04222 SR155 103MAA CAP FXO ELCTLT 4 7UF 75 10 35V0C 55680
55. 9 0 04 V CR586 0387 1951 6V 5 6388 R36 86 SELECTABLE Bok T 66 BANDWIDTH ley AMPLIFIER af OUTPUT AMPLIFIER VOLTAGE amp WAVEFORM CONDITIONS 1 LOCATED MAINFRAME IIB 51 4 I38 DIODE RAIA BRIDGE 49 9K FROM SA RECTIFIERS Tew BALANCE MAIN IOK FRAME 58 0 49 9K 16V 0 C l6v 6 IB R422 0 5 I TB 6A LOCATED ON MAINFRAME TA R458 2 PARTIAL Al AMPLIFIER BOARD J 886 5 5 2 __ 98 gt T FROM 4 54 MAINFRAME lt ONLY t 6 2086 gt 20A J475 OPTION I ONLY F ees _ _ _ _ _ 23A 28 JA eza J480 5 INTERNAL SOmTERM 10 MAINFRAME SRE 2052 36 REV C 1979 19 3V REGULATOR masa up 4 gt su 7 F8 MORI s de 19 3V ON AME 20VQISmA I CV 16V l6Va3 C436 IO 2 CI BALANCE IC 16 5 V REGULATOR exe SEE PARTS LIST FOR EARLIER VALUES AND SERIAL
56. 927 E STATE PKY SCHAUMBURG IL 60195 56289 SPRAGUE ELECTRIC CO 87 MARSHALL ST NORTH ADAMS MA 01247 57668 ROHM CORP 16931 MILLIKEN AVE IRVINE CA 92713 58361 GENERAL INSTRUMENT CORP 3400 HILLVIEM AVE PALO ALTO CA 94304 OPTOELECTRONICS DIV 59660 TUSONIX INC 2155 N FORBES 8LVO TUCSON ARIZONA 85705 59821 CENTRALAB INC 7158 MERCHANT AVE EL PASO TX 79915 508 NORTH AMERICAN PHILIPS CORP 71400 MC 00M C0150M CO 502 EARTH CITY PLAZA ST LOUIS M0 63178 BUSSMANN MFG OIV P 0 BOX 14460 71244 GENERAL INSTRUMENT CORP LAMP OIV 4433 N RAVENSMOOD AVE CHICAGO IL 60640 75042 TRA INC 401 N BROAD ST PHILADELPHIA PA 19108 TRA ELECTRONIC COMPONENTS IRC FIXED RESISTORS PHILADELPHIA OIV 75915 LITTELFUSE INC 800 E NORTHMEST HAY 065 PL INES IL 60016 76493 BELL INDUSTRIES INC MILLER J DIV 19070 REYES AVE COMPTON CA 90224 P 0 BOX 5825 79727 C M INOUSTRIES 550 OAVISVILLE RD WARMINSTER 18974 P 0 80X 96 80009 TEKTRONIX INC 4900 S M GRIFFITH DR BEAVERTON OR 97077 P 0 80X 500 91637 DALE ELECTRONICS INC P 0 80X 609 COLUMBUS NE 68601 6 2 REV DEC 1985 mponent No 48135 M M M A1 1 At C100 C101 C103 C108 C110 112 124 125 C126 C133 C137 C138 C140 C146 C148 C153 C153 C155 C156 C160 C165 C168 C172 C176 C187 C218 C218 C220 C232 C234 C242 C244 C306 C308 C313 C323 C328 C345 C345 C351 C360 C363 C363 C364 C364 C364 C365 C365 C366 C366 C367 REV DEC 1985 Tektronix Part No 670 4353 00 670 435
57. C HEXAGONAL SOCKET COMP COMPOSITION HLCPS HELICAL COMPRESSION CONN CONNECTOR HLEXT HELICAL EXTENSION COVER HV HIGH VOLTAGE CPLG COUPLING IC INTEGRATED CIRCUIT CRT CATHODE RAY TUBE ID INSIDE DIAMETER DEG IDENT IDENTIFICATION DWR DRAWER IMPLR IMPELLER IN INCH SE SINGLE END INCAND INCANDESCENT SECT SECTION INSUL INSULATOR SEMICOND SEMICONDUCTOR INTL INTERNAL SHLD SHIELD LPHLDR LAMPHOLDER SHLDR SHOULDERED MACH MACHINE SKT SOCKET MECH MECHANICAL SL SLIDE MTG MOUNTING SLFLKG SELF LOCKING NIP NIPPLE SLVG SLEEVING NON WIRE NOT WIRE WOUND SPR SPRING OBD ORDER BY DESCRIPTION SQ SQUARE OD OUTSIDE DIAMETER SST STAINLESS STEEL OVH OVAL HEAD STL STEEL PH BRZ PHOSPHOR BRONZE SW SWITCH PL PLAIN or PLATE T TUBE PLSTC PLASTIC TERM TERMINAL PN PART NUMBER THD THREAD PNH PAN HEAD THK THICK PWR POWER TNSN TENSION RCPT RECEPTACLE TPG TAPPING RES RESISTOR TRH TRUSS HEAD RGD VOLTAGE RLF RELIEF VAR VARIABLE RTNR RETAINER VV WITH SCH SOCKET HEAD WSHR WASHER SCOPE OSCILLOSCOPE XFMR TRANSFORMER SCR SCREW XSTR TRANSISTOR Replaceable Mechanical Parts AM 503 Code Manufacturer Address 01536 TEXTRON INC CAMCAR 0IV 1818 CHRISTINA ST SEMS PRODUCTS UNIT 02660 BUNKER RAMO CORP 2804 S 25TH AVE AMPHENOL NORTH AMERICA 0IV 06383 PANDUIT CORP 17301 RIOGELANO 09922 8URNOY CORP RICHAROS AVE 12327 FREEWAY CORP 9301 ALLEN OR 18203 ENGELMANN MICROWAVE CO SKYLINE ORIVE 22526 OU PONT E Ot NEMOURS AN
58. D CO INC 30 HUNTER LANE DU PONT CONNECTOR SYSTEMS 24546 CORNING GLASS WORKS 550 HIGH ST 27238 BRISTOL INDUSTRIES 630 E LAMBERT RO P 0 80X 630 45722 USM CORP PARKER KALON FASTENER OIV 61957 USM CORP 140 FEDERAL ST SUB OF EMHORT INDUSTRIES INC 70278 ALLIED STEEL CONVEYORS DIV OF 17333 HEALY SPARTON CORP 73743 FISCHER SPECIAL MFG 446 MORGAN ST 77900 SHRKEPROOF SAINT CHARLES RD DIV OF ILLINOIS TOOL WORKS 78189 ILLINOIS TOOL WORKS INC ST CHARLES ROAD SHAKEPROOF OIVISION 79136 WALDES KOHINOOR INC 47 16 AUSTEL PLACE 79807 WROUGHT WASHER MFG CO 2100 S 0 BAY ST 80009 TEKTRONIX INC 4900 S M GRIFFITH OR P 0 80X 500 83385 MANUFACTURING INC 3221 BIG BEAVER RD GREER CENTRAL 0IV 83486 INDUSTRIES INC 1101 SAMUELSON RD 85480 BRAOY M H CO 727 M GLENOALE AVE 86928 SEASTROM MfG CO INC 701 SONORA AVE 93907 TEXTRON INC 600 18TH AVE CAMCAR OIV TK0435 LEWIS SCREW CO 4114 5 PEORIA TK0507 0 HARA METAL PRODUCTS CO 542 BRANNAN ST CROSS INDEX MFR CODE NUMBER TO MANUFACTURER C State Zip Code ROCKFORD IL 61108 BROAOVIEN IL 60153 TINLEY PARK IL 60477 NORWALK CT 06852 CLEVELAND OH 44125 MONTVILLE NJ 07045 CAMP HILL 12011 BRADFORD PA 16701 BREA CA 92621 CAMPBELLSVILLE KY 42718 BOSTON 02107 DETROIT MI 48212 CINCINNATI OH 45206 ELGIN IL 60120 ELGIN IL 60120 LONG ISLAND CITY NY 11101 MILWAUKEE MI 53207 BEAVERTON OR 97077 TROY MI 48098 ROCKFORD IL 61101 MILWAUKE
59. E MI 53209 GLENOALE CA 91201 ROCKFORD IL 61101 CHICAGO IL 60609 SAN FRANCISCO CA 94107 REV DEC 1985 Replaceable Mechanical Parts AM 503 Fig amp Index Tektronix Serial Assembly No Mfr No Part No Effective Qty 12345 Description 1 1 337 1399 04 2 SHIELD L C 5106 80009 337 1399 04 2 366 1286 04 8010100 8036697 1 KNOB LATCH 80009 366 1286 04 2 1 366 1690 00 8036698 1 KNOB LATCH SIL GY 0 53 X 0 23 X 1 059 80009 366 1690 00 ATTACHING PARTS 3 214 1840 00 8010100 8036697 1 PIN KNOB SECRG 0 12L X 0 94 0 100 ACETAL 80009 214 1840 00 END ATTACHING PARTS 4 179 2415 00 1 WIRING HARNESS PROBE SIGNAL amp BIAS 80009 179 2415 00 ATTACHING PARTS 5 211 0012 00 4 SCREN MACHINE 4 40 X 0 375 PNH STL CO PL 83385 OROER BY OESCR 6 210 0586 00 4 NUT PL ASSEM WA 4 40 X 0 25 STL CO PL 78189 211 04 1800 00 210 0261 00 1 TERMINAL LUG 0 14 ID PLAIN BRASS 80009 210 0261 00 ENO ATTACHING PARTS HARNESS ASSEMBLY INCLUDES 8 131 1855 00 1 CONN RCPT ELEC 165 SERIES 12 FEMALE CONT 02660 165 12 9 352 0171 00 1 HLOR TERM CONN 1 WIRE BLACK 80009 352 0171 00 10 352 0161 00 1 HLOR TERM CONN 3 WIRE BLACK 80009 352 0161 00 11 352 0164 00 1 TERM CONN 6 WIRE BLACK 80009 352 0164 00 12 191 0707 00 10 CONTACT ELEC 22 26 QNG BRS CU GLO PL 22526 47439 000 43 210 0774 00 2 EYELET METALLIC Q 152 00 X 0 218 1 885 80009 210 0774 00 14 210 0775 00 2 EYELET
60. HEX 4 40 X 0 188 8RS CD PL 73743 12461 50 70 401 0178 01 1 BEARING SM CENTER REAR 0 378 I0 PLSTC 80009 401 0178 01 71 210 0406 00 3 NUT PLAIN HEX 4 40 X 0 188 BRS CD PL 73743 12161 50 72 407 1199 00 8010100 8050999 1 BRACKET COVER ABS 80009 407 1199 00 407 1199 03 8051000 1 BRACKET COVER PLASTIC FINISHED 80009 407 1199 03 73 105 0651 00 1 ACTUATOR SW ATTENUATOR 80009 105 0651 00 74 384 1424 01 8010100 8053639 1 5 SH 7 4 L X 0 188 DIA 80009 384 1424 01 384 1478 03 8053640 1 SHAFT 58 14 0 L X 0 488 OD INTMO CONC 80009 394 1478 03 ENTRIC W RIVER 75 210 0406 00 4 NUT PLAIN HEX 4 40 X 0 188 885 CO PL 73743 12161 50 76 214 1139 0393 2 SPRING FLAT 0 885 X 0 156 CU BE RED CLR 80009 214 1139 03 214 1752 00 2 ROLLER OETENT 0 125 0D X 0 16 SST 90009 214 1752 00 78 401 0180 00 1 BEARING 5 3 REAR 0 8 amp 0 83 010 80009 404 0180 00 ATTACHING PARTS 79 354 0390 00 1 RING RETAINING BASIC EXT U 0 0 375018 79136 5100 37 10 END ATTACHING PARTS 80 1 CKT BOARD ASSY MAIN PLUG IN SEE At REPL 80 1 200 2433 00 8047649 1 COVER PROT CONTACTS PLASTIC 80009 200 2433 00 8 4 REV DEC 1985 Replaceable Mechanical Parts AM 503 Fig amp index Tektronix Serial Assembly Mfr No Part No Effective Dscont 12345 Name amp Description Code Mfr Part No 1 81 1 SNITCH PUSH SEE 5125 REPL 82 361
61. IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO 50 REFER TO OPERATORS SAFETY SUMMARY AND SERVICE SAFETY SUMMARY PRIOR TO PERFORMING ANY SERVICE a A A lt lt lt Section 3 AM 503 ADJUSTMENT Introduction This adjustment procedure is to be used to restore the AM 503 to original performance specifications Adjust ment need not be performed unless the instrument fails to meet the Performance Requirements of the Electrical Characteristics listed in the Specification section or the Performance Check cannot be completed satisfactorily Completion of adjustment steps this procedure ensures that the instrument will meet the performance requirements listed in the Specification section However to fully ensure satisfactory performance it isrecommend ed that the Performance Check be performed after any adjustment is made Adjustment Instructions The alphabetical instructions under each step a b c etc may contain Check Examine or Adjust as the first word of the instruction These terms are defined as follows 1 Check indicates that the instruction accomplishes a performance requirement check Each performance requirement is derived from the instrument specification as listed in Table 2 1 Electrical Characteristics 2 Examine usually precedes an Adjust instruction and describes howto determine whether the adjustment 15 necessary Measurement limits following the word Ex am
62. MIRE SET ELEC 80009 498 0001 00 131 0707 00 41 CONTACT ELEC 22 26 ANG BRS CU GLD PL 22526 47439 000 10 175 0825 00 AR CABLE SP ELEC 2 26 AMG STRO PVC JKT RBN 80009 175 0825 00 108 175 0826 00 AR CABLE 5 3 26 ANG STRO PVC JKT RBN 80009 175 0826 00 109 352 0169 02 1 HLDR TERM CONN 2 WIRE RED 80009 352 0169 02 352 0161 00 1 HLOR TERM CONN 3 WIRE BLACK 80009 352 0161 00 352 0161 03 1 HLOR TERM CONN 3 WIRE ORANGE 80009 352 0161 03 352 0161 04 1 HLOR TERM CONN 3 WIRE YELLON 80009 352 0161 04 210 0774 00 1 EYELET METALLIC 0 152 00 X 0 218 1 885 80009 210 0774 00 210 0775 00 1 EYELET METALLIC O 126 0D X 0 205 1 885 80009 210 0775 00 REV OEC 1985 8 5 REV OCT 1985 FIG 1 EXPLODED AM503 Replaceable Mechanical Parts AM 503 Fig amp Index Tektronix Serial Assembly No No Part Effective _ Dscont 12345 amp Description Code Part 2 STANDARD ACCESSORIES 1 011 0049 01 41 0 TERMN COAXIAL 50 0MM 2M 8MC 18203 1132 06 2 012 0057 01 1 CABLE SSY RF 50 OHM COAX 43 0 L 80009 012 0057 01 070 2052 01 1 MANUAL TECH INSTR 80009 070 2052 01 OPTIONAL ACCESSORIES 1 PROBE CURRENT 06302 SEM 1 PROBE CURRENT 6303 REV 0CC 1985 8 7 REV APR 1985 AM 503 6 55322 MANUAL CHANGE INFORMATION At Tektronix we continually strive to keep up with latest electronic developments by adding circuit and component improvements to o
63. NH STL CD COR 672 0574 00 8010100 8047648 1 CIRCUIT BD ASSY ATTENUATOR 672 0574 01 B047649 B049499 1 CIRCUIT ASSY ATTENUATOR 672 0574 02 B049500 063180 1 CIRCUIT ASSY ATTENUATOR 672 0574 04 8063181 069999 1 CIRCUIT ASSY ATTENUATOR 51712 672 0574 06 8 070000 1 CIRCUIT BD ASSY ATTENUATOR 58635 58 211 0292 00 2228 SCR ASSEM WSHR 4 40 X 0 29 BRS NI PL POZ COR 83 136 0252 07 B010100 B063180 112 SOCKET PIN CONN W O DIMPLE 136 0252 07 B063181 B069999 71 SOCKET PIN CONN W O DIMPLE M52308 _ 136 0252 07 8070000 29 SOCKET PIN CONN W O DIMPLE 58635 86 344 0255 00 010100 069999 4 CLIP ELECTRICAL FUSE KT BD MT CU BE 344 0326 00 8070000 4 CLIP ELECTRICAL FUSE BRASS M58635 98 136 0728 00 B056560 B063180 1 SKT PL IN ELEK 14 CONTACT M52308 99 131 1030 00 8010100 8039999 13 CONT ASSY ELEC CAM SWITCH BOTTOM 131 1030 00 8034000 B047648 CONT ASSY ELEC CAM SWITCH BOTTOM 131 1030 01 8034000 047648 10 CONT ASSY ELEC CAM SWITCH BOTTOM 131 1030 00 B047649 049985 13 CONT ASSY ELEC CAM SWITCH BOTTOM 131 1030 01 8049986 059852 13 CONT ASSY ELEC CAM SWITCH BOTTOM 131 1030 00 8059853 13 CONT ASSY ELEC CAM SWITCH BOTTOM M52315 103 136 0269 02 B010100 8056559 1 SKT PL IN ELEK MICROCIRCUIT 14 DIP LOW M47304 131 0566 00 8030000 047648 2 BUS CONDUCTOR DUMMY RESISTOR M35696 Page 6 of 6
64. Q390 Q395 OUTPUT AMPLIFIER S DIODE BRIDGE RECTIFIER INPUT FROM POWER INPUT MODULE IVERLOAD 8 BRIDGE RECTIFIER CRaO6 HER lt gt SUPPLY lt gt 979 BLOCK DIAGRAM WVHOVIG COMPONENT LOCATIONS AMPLIFIER BOARD SN 8030830 amp ABOVE AM 503 RECN A NAAC SI EM LE dee LR DEON ie oy A VIR LATO y net AR D SPA C A eA MAL CA OCC Cy TO Cay A OA NOR AY NTE CD AREY A go vs ARN OE op n o NO aene ION DRL A de PLEAD IRAE Ue Ys PIA V nC HOC POM PAIS AMA De AO HAEC NUR CA Oe PC M e ANS p p R232 eve Rye RO ana R382 RU lal 1 ATEN DNS RENTON ARTES mai o RMO J E C x 1 E 2 3 E R e 380 eve 8222 AU 5 i i 1 E S s H 1 2051 2 d 1 3 E 3 Ae ee ae lt _ _ lt _ n _ ____ 4 8176 a p 5 2 gt
65. S FXD FILM 130 52 0 5 19701 5053 13000 R363 311 1263 00 8010100 8029999 RES VAR NONMN 1K 0 102 0 50 32997 3329 158 102 R363 311 1260 00 8030000 8047648 RES VAR NONWN TRHR 250 0 5 32997 3329P L58 251 R363 311 1265 00 8047649 RES VAR 2 OHM 0 08 32997 3329 158 202 R364 311 1265 00 8010100 8047648 RES 2X 0 58 32997 3329 158 202 R364 311 1260 00 8047649 RES VAR NONMM TRMR 250 0 5N 32997 3329 158 251 R365 315 0222 00 8030000 RES FXD F1LM 2 2K 54 0 25N 57668 NTR25J EO02K2 R366 315 0911 00 8030000 RES FILM 910 OHM 52 0 250 57668 NTR25J E910E R367 315 0103 00 RES FXD FILM 10K OHM 5X 0 250 19701 5043CX10K00J R368 315 0682 00 RES FXD FILM 6 8K 5 0 25 57668 NTR25J EO6KS R370 315 0152 00 RES FILM 1 5K 5 0 25 57668 NTR25J EO1K5 R372 321 0176 00 RES FXO FILM 665 1 0 1250 0 07716 66580 R373 315 0152 00 RES FILM 1 5K OHM 5 0 250 57668 NTR25J EO1K5 R374 321 0176 00 RES FXD FILM 665 OHM 1X 0 125M 0 07716 CE n0665R0O0F R376 321 0130 00 RES 2104 221 15 0 125 TC TO 91637 MFF18166221R0F R377 323 0185 00 RES FXO FILM 825 1 0 5W 0 19701 5033RD825RO0F R380 321 0097 00 RES FXD FILM 100 OHM 1X 0 125N TC TO 91637 X CMF551166100R0F R382 301 0681 00 RES FXD FILM 680 5 0 5 01121 686815 383 321
66. S FXD FILM 10 0HM 52 0 25H 19701 5043CX10RR00J R442 307 0103 00 RES FXD CHPSN 2 7 0HM 5X 0 25N 01121 82765 R446 315 0100 00 RES FXD FILM 10 52 0 25 19701 5043CX10RR00J R452 315 0102 00 RES FXD FILM 1K 5 0 25 57668 NTR25JE01K0 9454 315 0471 00 8010100 8019999 RES FXD FILM 470 0HM 5X 0 25N 57668 NTR25J E470E R454 315 0430 02 8020000 RES FXD CMPSN 43 0HM 52 0 25M 01121 C84305 R458 308 0240 00 8047649 RES FXO MM 2 OHM 52 05347 MS3 2R00J R462 315 0102 00 RES FXD FILM 1K 5 0 25 57668 MTR25JE01KO R464 315 0471 00 8010100 8019999 RES FXD FILM 470 52 0 25 7668 NTR25J E4 0E R464 315 0430 02 8020000 RES FXD CHMPSN 43 OHM 5Z 0 25M 01124 CB4305 R490 323 0068 00 RES FXD FILM 49 9 12 0 5 0 75042 CECTO 49R90F RT135 307 0122 00 RES THERMAL 50 10 14193 1815 500 RT156 307 0126 00 RES THERMAL 100 OHM 102 14193 2021 101 0 RT460 307 0126 00 RES THERNAL 100 OHM 40Z NTC 14193 2021 101 D RT342 307 0126 00 RES THERMAL 100 102 14193 2021 101 D 125 260 1421 00 SNITCH PUSH 1 8TN 2 POLE INSTRUMENT 0 59821 ORDER BY DESCR 5200 263 1111 00 SM CAM AS CURRENT DIV 80009 263 1111 00 52004 5200 105 0243 00 ACTUATOR SKITCH AC DC 90009 105 0243 00 52008 5379 260 0816 00 SNITCH SLIDE 0 58 125V 79727 6 126 00120 0110 156 0317 00 LINEAR AMPL 90009 156 0317 00 0135 156 0067 00 8010100 05655
67. T 04272 CERAMICS DIV OF AVX CORP 19TH AVE SOUTH MYRTLE BEACH SC 29577 P 0 80X 86 04713 MOTOROLA NC 5005 MCOOMELL RO PHOENIX AZ 85008 SEMICONOUCTOR GROUP 0534 ULTRONIX INC 461 N 22NO ST GRAND JUNCTION CO 81501 05337 UNION CARBIDE CORP MATERIALS SYSTEMS 11901 MADISON AVE CLEVELAND OH 44101 DIV 07253 FAIRCHILD CAMERA AND INSTRUMENT CORP 464 ELLIS ST MOUNTAIN VIEW CA 94042 SEMICONDUCTOR OIV 07716 TRA ENC 2850 MT PLEASANT AVE BURLINGTON IA 52601 TRA ELECTRONICS COMPONENTS TRA IRC FIXED RESISTORS BURLINGTON 12697 CLAROSTAT MFG CO INC LOWER WASHINGTON ST DOVER NH 03820 42954 MICROSEMI CORP 8700 THOMAS RD SCOTTSOALE AZ 85252 P 0 BOX 1390 14193 CAL R INC 4601 OLYMPIC 8LV0 SANTA MONICA 90404 44752 ELECTRO CUBE INC 1710 S DEL MAR AVE SAN GABRIEL CA 91776 14936 GENERAL INSTRUMENT CORP 600 M JOHN ST HICKSVILLE NY 11802 DISCRETE SEMI CONDUCTOR DIV 15238 TT SEMICONDUCTORS 500 80000M V LAWRENCE MA 01841 A DIVISION OF INTERNATIONAL P 0 BOX 168 TELEPHONE TELEGRAPH CORP 19701 MEPCO ELECTRA INC P 0 BOX 760 MINERAL WELLS TX 76067 A NORTH AMERICAN PHILIPS CO 24546 CORNING GLASS WORKS 550 HIGH ST BRADFORD PA 16701 3299 80URNS INC 1200 COLUMBIA AVE RIVERSIDE CA 92507 TRIMPOT OLV 38333 SILICON GENERAL INC 41651 MONARCH ST GARDEN GROVE CA 92641 34371 HARRIS SEMICONDUCTOR OIV OF HARRIS 0 80X 883 MELBOURNE FL 32901 CORP 51642 CENTRE ENGINEERING INC 2820 COLLEGE AVE STATE COLLEGE PA 16801 55680 NICHICON AMERICA CORP
68. able 3 required Impedance 50 0 length 42 inches connectors bnc _ Ac low frequency 3 dB point check Dynamic range Used in all test setups Examples TEKTRONIX 502 Part 012 0057 01 8 Termination Impedance 50 in line Used in all test setups Tektronix Part 2 required connectors bnc 011 0049 01 9 Special Adapter Impedance 25 in line Used in all test setups See Fig 3 1 connectors bnc 10 Adapter bnc T AC Dynamic Tektronix Part No Range 103 0030 00 11 10X Impedance 50 Attenuator connectors 3 required Requires TM 500 Series Power Module Preliminary Procedure 1 Ensure that all power switches are off 2 Ensure that all test equipment and the power module into which the AM 503 under test will be installed are suitably adapted to the line voltage to be applied 3 Install the AM 503 into the power module and if applicable install all other TM 500 Series test equipment into the power module 4 Connect the power module s and test equipment to a suitable line voltage source Turn all equipment on and allow at least 20 minutes for the equipment to warm up and stabilize REV B DEC 1980 Noise Dynamic range Tektronix Part No 011 0059 02 Check Current Division Accuracy Set the following controls as indicated AM 503 CURRENT DIV 5 Coupling DC BANDWIDTH FULL Calibration Generator Amplitud
69. able 4 1 If a power supply ts within the tolerance given in Table 4 1 the supply can be assumed to be working correctly If outside the given tolerance the supply may be misad justed or operating incorrectly Usethe procedure givenin the Adjustment section to adjust the 16 volt power supplies Table 4 1 POWER SUPPLY TOLERANCES Power Output Maximum Supply Voltage Ripple Peak to Peak 116 15 9 to 16 1 2 mV 19 3 V 18 3 to 20 3 150 mV Maintenance AM 503 NOTE LEAD CONFIGURATIONS AND CASE STYLES ARE TYPICAL BUT MAY VARY DUE TO VENDOR CHANGES OR INSTRUMENT MODIFICATIONS C cATHODE 1 ANODE 2 CATHODE 2 8 CASE 4 ANODE 1 m METAL PLASTIC CASE TRANSISTORS DUAL DIODE FLAT PACK TRANSISTOR L INTEGRATED CIRCUITS 2052 12A Fig 4 2 Semiconductor lead configurations SOLDERING TECHNIQUES make a good solder joint Use only 60 40 rosin core electronic grade solder Apply only enough solder to make a firm solder joint The choice of solderingironis determined by therepair The circuit board in this instrument is a multi layer type board with conductive paths laminated To avoid electric shock disconnect the instrument between the top and bottom board layers All from the power source before soldering soldering should be done with extreme care to prevent breaking the connections to the center conductors only ex
70. any electrical component has been replaced the adjustment of that particular circuit should be checked as well as other closely related circuits Refer to the Adjust ment section of the manual REV A NOV 1979 Section 5 AM 503 CIRCUIT DESCRIPTION Introduction This section of the manual contains a description of the circuitry used in the AM 503 Current Probe Amplifier The description begins with a discussion of the instrument using the block diagram shown in the Diagrams section Block Diagram Description The block diagram shows the states and the basic interconnections of each major circuit in the description The number by each title on the block diagram and circuit description refers to the corresponding circuit diagram the Diagrams section of this manual Typical Current Probe The probe area depicted in grey tint is shown to give a general overview of the signal flow from the typical probe The current probe Hall device output is fed to the Hall device preamp part of the DC Amplifier Hall Disconnect and Power Amplifier The Power Amplifier output is fed back through the probe transformer to the input attenuators With a square wave input the probe Hall device output and the probe transformer output are combined as shown in Fig 5 1 to produce the square wave that is fed to the attenuators Fig 5 1D and is seen at the OUTPUT con nector DC Amplifier The Hall Device Preamplifier provides single en
71. components oftheinput signal are coupledto the Output Amplifier input CAL DC LEVEL Grounds the Qutput Amplifier input to permit adjustingthe amplifier output dc level OUTPUT INTO 50 bnc connector for connecting amplifier output to monitor oscilloscope must be terminated into 50 2 INPUT Connector Provides connection for current probe Fig 1 2 AM 503 controls and connectors 2052 38 Operating Instructions AM 503 Using the AM 503 with Probe Set the monitor oscilloscope vertical input to ground and position the trace vertically to graticule center Reset the monitor oscilloscope vertical input to dc coupling Set the AM 503 AC CAL DC LEVEL DC switch to the CAL DC LEVEL position Rotate the DC LEVEL control to position the monitor oscilloscope trace to graticule center With the current probe slide the closed position not connected around a conductor press and release the DEGAUSS button NOTE Removal of any magnetic flux present in the probe transformer core always requires degaussing the probe This is important after connecting or reconnecting the probe or after making meas urements in excess of the instrument range Set the AM 503 AC CAL DC LEVEL DC switch to DC Set the CURRENT DIV full clockwise Adjust the screw driver BALANCE control to position the monitor os cilloscope trace to graticule center The AM 503 and current probe are balanced degauss ed and ready to measure curren
72. ded output to the Hall Disconnect Q115 which switches the Hall device output out of the circuit when using the degauss function The Power Amplifier provides gain crossover frequency compensation and input overload indication The Degauss Oscillator provides a decaying sine wave signal through the Power Amplifier to the probe trans former to remove residual magnetism in the transformer core The DC Amplifier also contains a deflection sensitivity indicator circuit With a 1X probe e g P6302 connected to the INPUT the 1X lamp is lit behind the knob skirt to indicate the proper deflection sensitivity Another lamp is lit 10X behind the knob skirt when using a 10X probe e g P6303 REV A NOV 1979 d LJ L A CURRENT WAVEFORM IN CONDUCTOR UNDER TEST E LOW FREQUENCY INFORMATION FROM HALL DEVICE AMPLIFIED AND APPLIED TO INPUT OF ATTENUATOR C HIGH FREQUENCY INFORMATION FROM TRANS FORMER APPLIED TO INPUT OF ATTENUATOR D RESULTANT WAVEFORM SEEN AT THE OUTPUT OF THE AM 503 2052 11 Fig 5 1 AM 503 and probe waveforms A PROBE UNLOCKED lamp on indicates that the probe slide is not completely closed or locked Attenuator The attenuator provides current per division sen sitivities in a 1 2 5 sequence from 1 mA to 5 for a 1X probe and from 10 mA to 50 A for a 10X probe It also provides a 25 Q input termination for the DC Amplifier in all attenuator positions The
73. device dc bias voltage is applied through a selected resistor in the probe via pin of the INPUT connector and R102 to pin 2 of U110 BALANCE control R120 provides fine adjustment to cancel dc offset in the probe Hall Disconnect The Hall disconnect switch consists of CR115 CR116 and Q115 In normal operation 0115 gate is at about zero volt and Q115 is conducting Signals from U110 are applied to Q115 drain through R116 and passed through Q115to pin 2 of 0145 Diodes CR115 and CR116 clamp the drain of Q115 when the signal levels exceed about or 0 5 V Pressing the DEGAUSS switch S125 applies 16 V through R122 to 0115 gate and junction of R124 and C124 C124 discharges and Q115 turns off When the DEGAUSS switch is released 0115 remains biased off for approximately 1 second by the time constant of C124 R124 allowing the output of the degauss os cillator time as determined by C126 R127 to decay to zero The result is that the signal path is interrupted when the DEGAUSS button is pressed and released permitting the probe transformer core to be degaussed by the degauss oscillator The output is fed to the J100 pins N and K through P160 REV A NOV 1979 Degauss Oscillator The Degauss Oscillator consists of sine wave oscillator U135 gain regulating FET Q130 and associated com ponents including output amplitude control R136 In normal operation DEGAUSS switch open C126 charges to 16 V through R127
74. e 10 V Mode std ampl Monitor Oscilloscope Volts Div 5 mV Time Div 50 us Input Coupling dc Triggering ext 2 5 Specification and Performance Check AM 503 a Connect the OUTPUT of the AM 503 to the input of the monitor oscilloscope using a 50 Q cable and a 50 Q terminator b Connect the Ampl Output of the calibration generator to the AM 503 INPUT using the special adapter see Fig 3 1 and a 50 Q cable c Usingthe AM 503 DC LEVEL control andthe monitor oscilloscope vertical position control center the display d Check that the signal amplitude is two divisions e Set the AM 503 calibration generator and monitor oscilloscope as indicated in Table 2 2 Check that the signal amplitude in each step 1 five divisions 0 15 division Table 2 2 CURRENT DIVISION ACCURACY CONTROL SETTINGS Calibration Monitor Oscilloscope AM 503 Generator VOLTS DIV 20 5 10A 10 mV 05 A 10 mV 02 10 mV 10 50 10 20 mA mV 10 mA 10 V 5 mA 10 mV 2 mA 10 mV t mA 20 mV g Remove test connections 2 Check AC Dynamic Range Set the following controls as indicated AM 503 CURRENT DIV 5 Coupling DC BANDWIDTH FULL Low Frequency Sine Wave Generator Frequency 100 Hz Amplitude Minimum Offset Off in Monitor Oscilloscope Volts Div 20 mV Coupling dc Time Div 5 ms a See Fig 2 1 for test setup b Set the sine wave generator for 28 3 mV rms out of the AM 503 mon
75. ector when it is replaced an arrow is stamped on the circuit board and a matching arrow is molded into the plastic housing of the connector See Fig 4 3 sure these arrows are aligned asthe multi pin connector is replaced If the individual lead end pin connectors are removed from the plastic holder note the color of the individual wires for replacement CIRCUIT BOARD PINS Replacement of circuit board pins on multi layer boards 15 not recommended refer such repairs to your local Tektronix Field Office or represen tative REV A NOV 1979 CRIMPED SIDE OF TERMINAL CONNECTOR FACES TOWARD HINGED PORTION OF HOLDER TRIANGLE KEY SYMBOL SIGNIFIES PINNO 1 2052 3 1481 27 Fig 4 3 Installation lead end connectors A circuit board pin replacement kit including neces sary tools instructions and replacement pins is available from Tektronix Inc Order Tektronix Part No 040 0542 00 Use the following procedure to remove and replace a damaged circuit board pin 1 Grip the pin with long nose pliers Touch the soldering iron to the pin at the solder connection do not lay the iron directly on the board as the board may be damaged 2 When the solder begins to melt gently pull the damaged pin from the board Leave the ferrule inthe hole if possible Refer to Fig 4 4 3 If the ferrule remains the circuit board remove the spare ferrule from the replacement pin and press the new pin into the ho
76. edure Section 6 a Q230 b Q360 c Q385 d Q390 e Q395 4 9 Maintenance AM 503 Table 4 2 cont TROUBLESHOOTING F TROUBLE SYMPTOM Excessive Pulse Aberrations or Poor Bandwidth cont f U370 g 0350 h Q310 Q320 I Q315 Q325 voltages on schematics 2 and in Section 9 a U110 b 3 V Supply c Check probe as shown in Probe Check following this troubleshooting table 5 Press and release DEGAUSS button and set voltage out at J202 to zero volt Voltage at P202 should be 20 mV p p with less than 3 droop with 40 mA p p into P6302 probe G TROUBLE SYMPTOM Excessive Line Frequency Ripple at AM 503 OUTPUT connector II CHECK indicates a pro blem examine the following components and replace CHECK if necessary a Be sure AM 503 is grounded to display device 1 Is AM 503 grounded to display device monitor oscilloscope 4 10 Table 4 2 cont TROUBLESHOOTING TROUBLE SYMPTOM Excessive Line Frequency ple at AM 503 OUTPUT connector cont 2 Voltage level across C402 or C406 should be between 24 and 34 a Circuit board edge con nector is properly plugged into power supply module volts with maximum b 402 F406 ripple 4 5 V p p 3 116 V Supply level a U410 and ripple shown in b R403 R407 Table 4 1 4 119 3 V Supply level a Q450 Q460 and ripple shown in b VR452 VR462 Table 4 1 ADJUSTMENT AFTER REPAIR After
77. ents from alocal commercial source in your area Before you purchase or order a part from a source other than Tektronix Inc please check the Replaceable Electrical Parts list for the proper value rating tolerance and description NOTE When selecting replacement parts it is important to remember that the physical size and shape of a component may affect its performance in the instru ment particularly at high frequencies Each part should be a direct replacement unless it is known that a different component will not adversely affect instrument performance Apply lubricant to the drum journals and mating surface in the mounting bearings Apply lubricant to the wear surface of the index wheel Apply lubricant to the index roller and roller guide in the front bearing A thin film should be applied to the inner face of the detent springs if more than one spring is replaced Ensure that some lubricant is present at the interface between the bearing and retainer clip 2052 2 1481 40 Fig 4 1 Lubrication procedure for a typical cam switch Some electrical parts are manufactured or selected by Tektronix Inc to satisfy particular requirements or are manufactured for Tektronix Inc to our specifications Most of the mechanical parts used in this instrument are manufactured by Tektronix Inc To determine the manufacturer of parts refer to parts list cross index Mfr Code number to Manufacturer 4 2 When ordering re
78. eplaceable Electrical Parts List and Schematic Changes REMOVE Tektronix Serial Model No Component No Part No _ Dscont Name amp Description Reference C234 290 0134 00 B069999 CAP FXD ELCTLT 22UF 20 15V M58635 C244 290 0134 00 B069999 CAP FXD ELCTLT 22UF 20 15V M58635 R232 315 0201 00 B069999 RES FXD CMPSN 200 OHM 5 0 25W M58635 R234 315 0621 00 B069999 RES FXD CMPSN 620 OHM 5 0 25W M58635 R242 315 0201 00 B069999 RES FXD CMPSN 200 OHM 5 0 25W M58635 R244 315 0621 00 B069999 RES FXD CMPSN 620 OHM 5 0 25W M58635 VR166 152 0306 00 B047648 SEMICOND DEV ZEN 9 1V 5 0 4W M58635 ADD C311 283 0194 00 6063201 CAP FXD CER DI 4 7UF 20 50V M51712 C395 283 0194 00 8063201 CAP FXD CER 01 4 71 20 50 M51712 VR168 152 0306 00 B047649 SEMICOND DEV ZEN 9 1V 5 0 4W M58635 VR232 152 0217 00 8070000 SEMICOND DEV D ZEN SI 8 2V 5 0 4W M58635 VR242 152 0217 00 8070000 SEMICOND DEV DI ZEN SI 8 2V 5 0 4W M58635 CHANGE TO A1 670 4353 08 B070000 CIRCUIT BD ASSY MAIN PLUG IN M58635 C232 283 0191 00 B070000 CAP FXD CER D1 0 022UF 2096 50V M58635 C242 283 0191 00 070000 CAP FXD CER D 0 022UF 20 50V M58635 Q230 151 1090 00 8063201 TRANSISTOR FET DUAL N CHANNEL SI M51712 R135 321 0210 00 B070000 RES FXD FILM 1 5K OHM 1 0 125W M58635 R136 311 1266 00 8070000 RES VAR NONWW TRMR 2 5K OHM 0 5W 58635 R220 315 0474 00 8070000 RES FXD CMPSN 470K OHM 5 0 25W M58635 R328 315 0680 00 8063181 RES FXD CMPSN 68 OHM 5 0 25W M52308 R366 311 0635
79. es a pro blem examine the following components and replace if CHECK necessary 1 P160 and P202 plugged into the correct sockets 2 19 3 V Supply a Q450 Q460 b VR452 VR462 a VR100 b VR172 3 3 V Supply 4 Voltage at P202 with a Cables from J100 to P160 REV A NOV 1979 Table 4 2 cont TROUBLESHOOTING C TROUBLE SYMPTOM Unableto set signal at OUTPUT to zero with BALANCE control cont DEGAUSS depressed is 11 V p p with probe connected 5 With probe removed and INPUT E shorted to pin F E BALANCE should vary dc voltage at P160 from at least 5 V to greater than 5 V CHECK 6 With probe recon nected press and re lease DEGAUSS button and set OUTPUT level to zero with BALANCE control and P202 are properly in stalled b 0155 c 0115 d U145 e U135 f Q130 a P110 b U110 c R120 II CHECK indicates a pro blem examine the following components and replace if necessary a U110 b Check probe using Probe Check follow ing this trouble shooting table D TROUBLE SYMPTOM No Degauss Signal CHECK 1 16 V Supply 2 19 3 V Supply 3 Voltage at 0135 pin 6 with DEGAUSS button depressed is 7 V p p 1 V at about 160 Hz 4 Voltage at P202 with DEGAUSS button depressed is 11 V p p with probe connected REV A NOV 1979 II CHECK indicates a pro blem examine the following components and replace if necessary a F402
80. full bandwidth Noise Ampl random 1st two cw positions of CURRENT DIV switch Ampl random CURRENT DIV switch ranges except 1st two cw positions Random typical probes P6302 P6303 Attenuator Accuracy REV SEP 1984 Items listed the Performance Characteristics column of the Electrical Characteristics are verified by completing the Performance Check in this section of the manual Items listed in the Supplemental Information column are not verified in this manual The items are either ex planatory notes or performance characteristics for which no limits are specified SPECIFICATION Table 2 1 ELECTRICAL CHARACTERISTICS Performance Characteristics Supplemental Information OUTPUT terminated into 50 2 DC function DC to at least 100 MHz DC to at least 15 MHz DC to at least 50 MHz 5 MHz 1 MHz 10 8 0 3 mA Tangentially measured lt 3 mA Tangentially measured Within 3 of indicated Current Division BANDWIDTH Full function in CAL DC LEVEL dc level adjusted for zero dc out BANDWIDTH Full function in DC CURRENT DIV full cw DC LEVEL adjusted for zero dc out Specification and Performance Check AM 503 Characteristics Deflection Factor typical probes P6302 P6303 Thermal Drift Amplifier Only OUTPUT dynamic range Standard Instrument Characteristics Temperature Operating Non operating Humidity Operating Non operating Altitude O
81. g any semiconductor A good check of transistor operation is actual perfor mance under operating conditions A transistor can most effectively be checked by substituting a new component for it or one which has been checked previously However be sure that circuit conditions are not suchthata replacement transistor might also be damaged If sub stitute transistors are not available use a dynamic tester Static type testers are not recommended since they do not check operation under simulated operating con ditions A suction type desoldering tool must be used to remove soldered in transistors see component replace ment procedure for details Integrated circuits can be checked with a voltmeter test oscilloscope or by direct substitution A good understanding of the circuit description is essential to troubleshooting circuits using IC s Operating waveforms logic levels and other operating information for the IC s are given in the circuit description information of the appropriate manual Use care when checking voltages and waveforms around the IC s sothat adjacent leads are not shorted together A convenient means of clipping a test probe to the 14 and 16 pin in line iC s is with an integrated circuit test clip This device also doubles as an extraction tool Lead configurations for the semiconductors used in this instrument are shown in Fig 4 2 REV A NOV 1979 Maintenance AM 503 Diodes Do not use an ohmmeter that has
82. icable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number 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 further Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS ACTR ACTUATOR PLSTC PLASTIC ASSY ASSEMBLY QTZ QUARTZ CAP CAPACITOR RECP RECEPTACLE CER CERAMIC RES RESISTOR CKT CIRCUIT RF RADIO FREQUENCY COMP COMPOSITION SEL SELECTED CONN CONNECTOR SEMICOND SEMICONDUCTOR ELCTLT ELECTROLYTIC SENS SENSITIVE ELEC ELECTRICAL VAR VARIABLE INCAND INCANDESCENT WW WIREWOUND LED LIGHT EMITTING DIODE XFMR TRANSFORMER NONWIR NON WIREWOUND CRYSTAL 6 1 Replaceable Electrical Parts AM 503 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code 00853 SANGAMO WESTON INC SANGAMO RD PICKENS SC 29671 SANGANO CAPACITOR OIV P 0 BOX 128 01121 ALLEN BRAGLEY 0 1201 SOUTH 2NO ST MILWAUKEE 53204 03508 GENERAL ELECTRIC 0 M GENESEE ST AUBURN NY 13021 SEMI CONDUCTOR PRODUCTS DEP
83. ine are not to be interpreted as performance limits derived from the instrument specifications They are provided as indicators of a properly functioning instru ment and to aid in the adjustment process 3 Adjust describes which adjustment to use to make the desired result Werecommendthat adjustments not be made if a previous Check or Examine instruction indicates that no adjustment is necessary Adjustment Interval To maintain instrument accuracy check the perfor mance of the Current Probe Amplifier every 1 000 hours of operation or every six months if used infrequently Services Available Tektronix Inc provides complete instrument repair and adjustment at local Field Service Centers and at the Factory Service Center Contact your local Tektronix Field Office or representative for further information Test Equipment Required The test equipment listed in Table 3 1 or equivalent is required for adjustment of the AM 503 Specifications given for the test equipment are the minimum necessary for accurate adjustment and measurement All test equip ment is assumed to be correctly calibrated and operating within specification If other test equipment is substituted control settings or calibration setup may be altered to meet the re quirements of the equipment used A flexible plug in extender Tektronix Part No 067 0645 02 is useful for troubleshooting or adjusting the AM 503 however the complete Adjustment Procedu
84. ing the soldered connection If it is desired to remove solder from a circuit board hole for installation of a new component use a solder removing wick 3 Bend the leads of the new component to fit the holes in the board If the component 15 replaced while the board is mounted in the instrument cuttheleads sothey will just protrude through the board Insert the leadsintothe holes in the board so the component is firmly seated against the board or as positioned originally If it does not seat properly heat the solder and gently press the component into place 4 Touch the iron to the connection and apply a small amount of solder to make a firm solder joint To protect heat sensitive components hold the lead between the component body and the solder joint with a pair of long nose pliers or other heatsink 5 Clip off the excess lead that protrudes through the board if not clipped off in step 3 6 Clean the area around the solder connection with a REV A NOV 1979 Maintenance AM 503 flux removing solvent Be careful not to remove informa tion printed on the board COMPONENT REMOVAL AND REPLACEMENT To avoid electric shock disconnect the instrument from the power source before replacing com ponents The exploded view drawing associated with the Replaceable Mechanical Parts list may be helpful in the removal or disassembly of individual components or sub assemblies Component locations and circuit board locatio
85. ipment itself DANGER indicates a personal injury hazard immediately accessible as one reads the marking SYMBOLS in This Manual This symbol indicates where applicable cautionary or other information is to be found As Marked on Equipment 4 DANGER High voltage REV A NOV 1979 e Protective ground earth terminal N ATTENTION refer to manual Power Source This product is intended to operate from a power source that will not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Grounding the Product This product is grounded through the grounding conduc tor of the power cord To avoid electrical shock plug the power cord into a properly wired receptacle before connecting to the product input or output terminals A protective ground connection by way of the grounding conductor in the power cord is essential for safe opera tion Danger Arising From Loss of Ground Upon loss of the protective ground connection all accessible conductive parts including knobs and con trols that may appear to be insulating can render an electric shock Use the Proper Power Cord Use only the power cord and connector specified for your product Use only a power cord that is in good condition Refer cord and connector changes to qualified service pers
86. itor oscilloscope indicates 80 mV peak to peak c Set monitor oscilloscope input coupling to gnd Position trace vertically four divisions below the center graticule line d Reset monitor oscilloscope input coupling to dc e Set AM 503 coupling to CAL DC LEVEL f Adjust AM 503 DC LEVEL to position trace vertically four divisions below the center graticule line g Reset the AM 503 coupling to DC h Using the AM 503 DC LEVEL control center the sig nal on the center graticule line i Check DVM should read at least 26 9 mV rms or greater j Set monitor oscilloscope input coupling to gnd k Position the trace vertically four divisions above the center graticule line Reset the monitor oscilloscope input coupling to dc m Set the AM 503 coupling to CAL DC LEVEL REV NOV 1981 LOW FREQUENCY SINE WAVE GENERATOR SPECIAL ADAPTER 10X ATTENUATOR 50 Q 500 TERMINATION Specification and Performance Check AM 503 MONITOR OSCILLOSCOPE BNC T ADAPTER 2052 39 Fig 2 1 Test setup for AC Dynamic Range Check n Adjust the AM 503 DC LEVEL control to position the trace four divisions above the center graticule line o Set the AM 503 coupling to DC p Using the AM 503 DC LEVEL control center the sig nal on the center graticule line q Check DVM should read at least 26 9 mV rms or greater r Remove test connections 3 Check Amplifier Noise Set the following control
87. lamps 05190 05192 located behind the CURRENT DIV knob skirt illuminates the appropriate deflection factor selector for either a 1X or 10X probe With a 1X probe e g P6302 connected to the INPUT connector pin L of the connector remains ungrounded Q180 is biased off through R176 With Q180 biased off Q185 is biased on through divider network R181 R182 R183 05190 current 05190 is not sufficient to light the lamp With Q185 biased on saturated its collectoris at about 15 5 V lighting DS192 1X through R189 Connecting a 10X probe e g P6303 to the INPUT connector grounds pin L and the anode of CR175 Q180 collector current illuminates DS190 the 10X indicator its coltector voltage reverse biases Q185 When Q185 is turned off it turns off the 1X indicator DS192 Hall Device Preamplifier lt gt The Hall device preamplifier consists of operational amplifier 0110 its associated components and the BALANCE control R120 With a probe connected to the INPUT connector and the probe coupled around a current carrying conductor e g a conductor carrying dc or low frequency the conductor magnetic field induces a voltage through the probe transformer at the output of the Hall device The resultant dc or low frequency output voltage is applied from pins E and F of the INPUT connector via R104 and R105 to pins 2 and 3 of U110 To cancel any offset from the Hall device a portion of the Hall
88. le in the circuit board REV A NOV 1979 Maintenance AM 503 _ REPLACEMENT PIN FERRULE PROPER PLACEMENT OF FERRULES IN CIRCUIT BOARD Fig 4 4 Circuit board pin and ferrule assembly If the ferrule is removed with the damaged pin carefully clean out the hole using a solder removing wick and a scribe Then press the replacement pin with its attached spare ferrule into the hole 4 Position the replacement pin in the same manner as the old pin 5 Solder the pin to the circuit board on each side of the board TROUBLESHOOTING PROCEDURE This procedure lists most of the probable causes of a number of possible troubles The trouble symptom is followed by a check procedure that lists the components that should be checked See the component locator gridin the Diagrams section for component location Maintenance AM 503 Table 4 2 cont TROUBLESHOOTING A TROUBLE SYMPTOM No signal at OUTPUT connector cont If CHECK indicates a problem examine the following com ponents and replace if CHECK necessary 1 Cable from J380 is properly installed may be connected for rear interface output 2 16 V Supply a F402 F406 b C402 C406 c U410 d Q155 Q166 e R412 R422 3 19 3 V Supply a Q450 Q460 b VR452 VR462 c U145 4 3 V Supply a VR100 b VR172 5 Voltage at P202 with a Cables from J100 to P160 DEGAUSS button P202 are properly pressed is 11 V
89. nditions require Accumulation of dirt on the components acts as an insulating blanket and prevents efficient heat dissipa tion which can cause overheating and component breakdown Avoid the use of chemical cleaning agents that might damage the plastics used in this instrument In particular avoid chemicals that contain benzene toluene xylene acetone or similar solvents Exterior Loose dust accumulated on the front panel can be removed with a soft cloth or small brush Remain ing dirt can be removed with a cloth dampened in a mild detergent and water solution Abrasive cleaners should not be used Interior Dust in the interior of the instrument should be removed occasionally due to its electrical conductivity under high humidity conditions The best way to clean the interior is to blow off the accumulated dust with dry low pressure air Remove any remaining dirt with a soft brush or a cloth dampened with mild detergent and water solution A cotton tipped applicator is useful for cleaning in narrow spaces Visual Inspection The AM 503 should be inspected occasionally for such defects as broken connections improperly seated semi REV A NOV 1979 conductors damaged circuit boards and heat damaged parts The corrective procedure for most visible defects is obvious however particular care must be taken if heat damaged components are found Overheating usually indicates other trouble in the instrument therefore
90. ns are shown in the Diagrams section Circuit Boards If a circuit board is damaged beyondrepair replacethe entire board assembly Part numbers are given in the Replaceable Electrical Parts list for completely wired boards Circuit Board Removal 1 Remove the knob from the CURRENT DIV switch and pull the knob off of the AC CAL DC LEVEL DC Switch 2 Disconnect all cables that terminate on the circuit board 3 Remove 4 screws holding the circuit board to the frame tabs 4 Slide the circuit board toward the rear of the frame until clear of the front panel and lift out 5 To replace the circuit board reverse the order of removal Switches Three types of switches are used in this instrument push button cam and slide The push button or slide switch should be replaced as a unit if damaged The following information is provided for the cam switch your local Tektronix Field Office or representative can provide additional repair information Maintenance AM 503 Cam Switches The cam switch used in this instrument consists of arotating cam that mates with contacts on the circuit board These contacts are activated by lobes onthe cam as the switch is rotated A cam switch can be disassembled for inspection cleaning repair or replace ment Repair of a cam switch should be undertaken only by experienced maintenance personnel A cam switch repair kit is available Tektronix Part No 003 0708 00 which contai
91. ns special tools for use in repairing or replacing the switch contacts Use the following procedure to remove and replace a cam switch 1 Remove the circuit board following instructions in Circuit Board Removal in this section 2 Remove eight screws that secure switch to circuit board 3 Remove cam switch assembly from board 4 Toreplace cam switch reverse the order of removal Semiconductors Semiconductors should be replaced only when actual ly defective Unnecessary replacement of semiconductors may affect the adjustment of the instrument If removed from sockets during routine maintenance return them to their original sockets To avoid component damage power must be turned off before removing or replacing semiconductors Replacement devices should be of theoriginaltypeora direct replacement Figure 4 2 shows the lead con figurations of the semiconductors used inthisinstrument When removing integrated circuits pull the device out of the socket slowly and evenly Try to avoid having one end of the integrated circuit disengage from the socket before the other as pulling unevenly may damage pins Interconnecting Pins Two methods of interconnection are used to connect the circuit board with other components When the interconnection is made with a coaxial cable a special lead end connector plugs into a socket on the board When the interconnection is made with a wirelead alead end pin connector is used This
92. onnect current probe tothe AM 503 INPUT connec tor Turn all equipment on and allow 20 minutes for the equipment to warm up and stabilize REV B NOV 1979 DC LEVEL Control Adjusts the OUTPUT de level to offset large de currents or change signal vertical position INPUT OVERLOAD Indicator Indicates that the measured current exceeds the maximum current rating of the Current Probe signal distortion will occur CURRENT DIV Switch Selects deflection factor from 1 mA Div to 50 A Div depending on current probe used Auto scaling changes the dial range by factor of 10 BANDWIDTH Switch Provides a choice of bandwiaths FULL Permits amplifier and probe system to operate at full rated bandwidth 5 MHZ Reduces the bandwidth to about 5 MHz to increase the signal to noise ratio for low frequency low level measurements RELEASE LATCH Pull to remove plug in REV C NOV 1979 BALANCE screwdriver adjustment Permits operator to balance probe for minimum trace shift as CURRENT DIV settings are changed Operating Instructions AM 503 DEGAUSS push button switch Momentary contact switch for energizing probe degauss circuit PROBE UNLOCKED Indicator Indicates probe slider is notin locked or closed position AC CAL DC LEVEL DC Switch Selects signal input coupling mode AC The ac component of the signalis coupledtothe amplifier and the dc component is blocked DC Both ac and dc
93. onnel Use the Proper Fuse To avoid fire hazard use only the fuse of correct type voltage rating and current rating as specified in the parts list for your product Refer fuse replacement to qualified service personnel AM 503 Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this product in an explosive atmosphere unless it has been specifically certified for such operation Do Not Remove Covers or Panels To avoid personal injury do not remove the product covers or panels Do not operate the product without the covers and panels properly installed Do Not Operate Without Covers tor TM 500 plug ins only To avoid personal injury do not operate this product without covers or panels installed Do not apply power to the plug in via a plug in extender REV A NOV 1979 AM 503 SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the preceding Operators Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present Use Care When Servicing With Power On Dangerous voltages exist at several points in this product To avoid personal injury do not touch exposed connec tions and components while power is on REV A NOV 1979 Disconnect power before removing protective panels soldering or replacing components Power Source This prod
94. ony Tektronix Japan 700000 Tektronix Holland NV Heerenveen The Netherlands AM 503 TABLE OF CONTENTS Page OPERATOR S SAFETY SUMMARY III SERVICE SAFETY SUMMARY SECTION 1 OPERATING INSTRUCTIONS 53 1 1 SECTION 2 SPECIFICATION AND PERFORMANCE 2 1 The remaining portion of this Table of Contents lists servicing instructions that expose personnelto hazardous voltages These instructions are for qualified service personnel only SECTION 3 ADJUSTMENT yy pi wa Qa _ 3 1 SECTION 4 MAINTENANCE 4 1 SECTION 5 CIRCUIT DESCRIPTION x c HER 5 1 5CCIICM6 REPLACEABLE ELECTRICAL PARTS 6 1 SECTION 7 DIAGRAM AND CIRCUIT BOARD ILLUSTRATION 7 1 SECTION 8 REPLACEABLE MECHANICAL PARTS AND EXPLODED VIEW 8 1 CHANGE INFORMATION AM 503 Fig No 1 1 2 1 2 2 3 1 3 2 3 3 3 4 4 1 4 2 4 3 4 4 5 1 LIST OF ILLUSTRATIONS Plug in installation and 503 controls and connectors Test setup for AC Dynamic Range check Display of tangentially measured Construction details for Special
95. output cable connects for rear interface output With the output cable connected for rear interface output a termination is not required because of the internal factory wired termination The monitor oscilloscope input impedance should be 50 if the rear interface connection is used It will cause an impedance mis match and possible loading of the AM 503 Changing output to rear interface Remove the right side snap in cover from the AM 503 Unplug the coaxial cable from the rear of the OUTPUT INTO 50 connector Carefully align the coaxial cable at the upper rear coaxial connector pressing firmly insert the cable The coaxial cable connector center pin is easily bent and alignment is critical when making the connec tion for rear interface output With the output cable internal connected to the rear interconnecting jack output the front panel OUTPUT INTO 50 Q connector will not have an output signal available Connecting the AM 503 Install the AM 503 into the TM 500 Series power module Ensure that the power module into which the AM 503 will be installed is suitably adapted to the line voltage to be applied Connect a 50 Q cable with bnc connectors and if necessary a 50 Q termination for impedance matching to the monitor oscilloscope vertical input Set the monitor oscilloscope vertical sensitivity for 10 mV Div The horizontal sweep speed should be consis tent with the signal frequency to be examined C
96. over outward from the side of the instrument the cover snaps into place c Be sure that the power switch is off Set the power module for the line voltageto be applied and connectit to the line voltage source d Install the other TM 500 Series equipment into the power module Degauss adjustment Tektronix Part No 308 0441 00 Used for all inputs to See Fig 3 1 AM 503 e Turn on all test equipment and allow 20 minutes for warm up and stabilization 1 Adjust Power Supply Voltages a Connect the DVM between each voltage test point and ground forthe supplies listed in Table 3 2 See Fig 3 2 for test point and adjustment locations b Examine each supply voltage to determine if it is within the range given c Adjust each supply voltage with the indicated adjustment REV A NOV 1979 _ CONNECTOR 131 1854 00 J GND 25 Q RESISTOR 321 0039 00 1 Adjustment AM 503 FEMALE 131 0955 00 COAXIAL CABLE 2052 40 Fig 3 1 Construction details for Special Adapter 2052 41 3 2 Power supply test point and adjustment locations REV A NOV 1979 Adjustment AM 503 Table 3 2 POWER SUPPLY TEST POIN Supply Test Point 16 V R422 16 V R412 19 3 V Q450 emitter 19 3 V Q460 emitter 2 Adjust Gain Set the following controls as indicated AM 503 CURRENT DIV 1A Coupling DC BANDWIDTH FULL Calibration Generator Period 1 ms Mode Fast Ri
97. perating Non operating 2 2 559 to 75 Table 2 1 cont ELECTRICAL CHARACTERISTICS Performance Characteristics Supplemental Information 1 mA to 5 A div in a 1 2 5 sequence 10 mA to 50 A div in a 1 2 5 sequence gt In first two cw positions 2mV C less at OUTPUT from 15 to 35 ambient In all but first two cw positions lt 0 4 mV C at OUTPUT from 15 C to 35 C ambient 80 mV and 80 mV with less CURRENT DIV set to 5 mA Div than 5 compression into 50 2 Monitor oscilloscope set for 20 mV div POWER CONSUMPTION 2217 W Table 2 2 ENVIRONMENTAL CHARACTERISTICS Information m Test to procedures of MIL STD 810C Methods 502 1 and 501 1 using Procedure as specified in MIL T 28800B paragraph 4 5 5 1 3 and 4 5 5 1 4 0 to 507 50 C to 95 relative humidity 60 C to 95 relative humidity Test to MIL STD 810C Method 507 1 Procedure IV modified as specified in MIL T 28800B paragraph 4 5 5 1 1 2 Test to MIL STD 810C Method 500 1 Procedure I as specified in MIL T 28800B paragraph 4 5 5 2 To 15 000 feet To 50 000 feet REV B NOV 1979 Specification and Performance Check AM 503 Table 2 2 cont ENVIRONMENTAL CHARACTERISTICS Characteristics Information Vibration Operating and Non operating With the instrument operating the vibration frequency is swept from 10 to 5
98. perienced maintenance per When soldering on circuit boards use a 15 to 40 watt sonnel should attempt repair of these boards pencil type soldering iron with a 1 8 inch wide wedge shaped tip Keep the tip properly tinned for best heat transfer to the solder joint Avoid excessive heat apply For metal terminals e g switch terminals poten heat only long enough to remove the component or to tiometers etc a higher wattage solderingironis required 4 4 REV NOV 1981 to accomplish the work For example if the component is connected to the chassis or other large heat radiating surface a 75 watt or larger soldering iron may be required The following technique should be used to replace a component on a circuit board 1 Grip the component lead with long nose pliers Touch the soldering iron to the lead at the solder connection Do not lay the iron directly on the board as it may damage the board 2 When the solder begins to melt gently pull the lead out If unable to pull the lead without using force try removing the opposite end of the component NOTE Some component leads may be difficult to remove if their leads were bent during machine insertion in the manufacturing process The bent lead held the component in place during a flow soldering process If a component lead is extremely difficult to remove it may be helpful to straighten the leads on the back side of the board with a small screwdriver or pliers while heat
99. placement parts from Tektronix Inc include the following information 1 Instrument type 2 Instrument serial number 3 A description of the part if electrical include circuit number 4 Tektronix part number TROUBLESHOOTING The following information is provided to help troubleshoot the AM 503 Information contained in other sections of this manual should be used along with the following information to aid in locating a defective compo nent An understanding of the circuit operation is very helpful in locating troubles particularly whereintegrated circuits are used Control Settings Incorrect control settings can indicate a trouble that does not exist If there is any question about the correct function or operation of any control see the Operating Instructions section of the manual Testing Equipment Generally a wide band oscilloscope a probe and a multimeter are all that is needed to perform basic waveform and voltage checks for diagnostic purposes The Adjustment Procedure lists specific equipment and the features necessary to adequately check out the AM 503 Circuit Isolation Note the symptom It often identifies the circuit in which the trouble is located When trouble symptoms appear in more than one circuit check the affected circuits by making waveform and voltage measurements Incorrect operation of all circuits often means trouble in the power supplies Using a multimeter check first for co
100. power modules only IL will operatein any compartment of a multiple compartment power module Installation and Removal Turn the power module off before inserting the plug in otherwise damage may occur to the plug in circuitry It is also recommended that the power module be turned off before removing the AM 503 Refer to Fig 1 1 Check to see that the plastic barriers on the interconnecting jack of the selected power module compartment match the cut outs in the AM 503 circuit board edge connector Align the upper and lower groove of the AM 503 chassis with the upper and lower guides of the selected compart ment Push the module in and press firmly to seat the circuit board in the interconnecting jack To remove the AM 503 pull on the release latch BARRIER BOTTOM GROOVE RELEASE LATCH PULL TO REMOVE 1431 21 2052 37 Fig 1 1 Plug in installation and removal REV JUN 1981 1 1 Operating Instructions AM 503 located in the lower left corner until the interconnecting jack disengages and the AM 503 will slide out OPERATING CONSIDERATIONS Introduction The remainder of this section contains the operating information required to obtain the most effective perfor mance from the instrument This includes the function and actions of the controls and connectors input connec tions and a general description of the operating modes and procedures for making basic measurements Controls and Connectors All of
101. re can be performed without use of the extender Table 3 1 LIST OF TEST EQUIPMENT REQUIREMENTS Description Performance Requirements Applications Examples Oscilloscope Bandwidth to 150 MHz vertical sensitivity 10 mV Div sweep rate 2 ms REV A NOV 1979 Gain Compensation and Degauss adjustment TEKTRONIX 7704A main frame and 7A16A 7B80 plug ins Adjustment AM 503 Table 3 1 cont LIST OF TEST EQUIPMENT REQUIREMENTS Description Performance Requirements Applications Calibration Generator duty cycle 50 amplitude range 0 5 V or less to at least 5 V Leading edge aberrations lt 2 into 50 Q Rise time terminated into 50 Q 10 ns Pulse Output period 1 us to 10 ms Examples TEKTRONIX PG 506 Pulse Generator Gain and Compensation adjustment Digital Range 0 to 20 V accuracy Power supply voltage TEKTRONIX DM 502A Voltmeter within 0 296 check Digital Multimeter Termination Impedance 50 Q connector bnc All measurements Tektronix Part No 011 0049 01 Cable 2 required Impedance 50 Q length All measurements Tektronix Part No 42 inches connectors bnc 012 0057 01 Fixed wire wound 0 W 5 Resistor Requires TM 500 Series Power Module Preparation a Construct Special Adapter as shown in Fig 3 1 b Remove the left side cover of the AM 503 to gain access to the adjustments Pull the rear end of the side c
102. rrect voltages of the individual regulated supplies according to the plug in module schematics and calibra tion procedures Then check the unregulated supplies of the power modules Defective components elsewhere in the instruments can appear as power supply problems In these instances suspected circuits should be dis connected from apparently bad power supplies one at a time to narrow the search REV A NOV 1979 Voltages and Waveforms Often defective components can be located by using waveform and voltage indications when they appear on the schematic or in the calibration procedures Such waveforms and voltage labels are typical indications and will vary between instruments To obtain operating con ditions similar to those used to take these readings refer to the first diagram in the service sections Semiconductor Checks Periodic checks of the semiconductors in the AM 503 are not recommended The best check of semiconductor performance is actual operation of the instrument More details on checking semiconductor operation are given under TROUBLESHOOTING Component Checking If a component cannot be disconnected from its circuit then the effects of the associated circuitry must be considered when evaluating the measurement Except for soldered in transistors and integrated circuits most com ponents can be lifted at one end from the circuit board Transistors and IC s Turn the power switch off before removing or replacin
103. s as indicated AM 503 CURRENT DIV 1 BANDWIDTH FULL Coupling CAL DC LEVEL Calibration Generator Mode Fast Rise Period 1 ms Pulse Amplitude midrange Use short cables REV NOV 1981 Monitor Oscilloscope Volts Div 10 Time Div 10 us Input Coupling gnd Triggering ext a Using a 50 Q cable and a 50 Q termination connect the AM 503 OUTPUT to the input of the monitor os cilloscope b Attach the three 10X attenuators to the Fast Rise Output of the calibration generator Using a 50 Q cable and the special adapter connect the 503INPUT tothe attenuators c Set the monitor oscilloscope vertical Position control so that the trace is on the center graticule line d Set the monitor oscilloscope input coupling to dc e Using the AM 503 DC LEVEL control position the trace to the center graticule line f Set the AM 503 coupling to DC 2 7 Specification and Performance Check AM 503 g Decrease the calibration generator output amplitude until the two traces just merge no dark area between the traces see Fig 2 2 SEPARATION 0629 2052 21 Fig 2 2 Display of tangentially measured noise A incorrect dark area showing between traces B correct display h Remove one 10X attenuator i Divide display amplitude by 10 Example 1 9 divisions of display at 10 mV Div 19 mV Divide 19 mV by 10 then the noise 1 9 mV j Check for a maximum of 4
104. se Pulse Amplitude Minimum Rising edge 1 Vto 0 V Monitor Oscilloscope Volts Div 50 mV Time Div 5 ms a Using the special adapter and 50 cable connect the calibration generator output to the AM 503 INPUT b Place the 1X probe on J202 on the back side of the board c Using the calibration generator pulse amplitude control set the display amplitude for 200 mV ignoring the first 10 us of each pulse d With a 50 Q cable and a 50 Q termination connect the AM 503 OUTPUT to the monitor oscilloscope e Set the monitor oscilloscope to 10 mV f Examine for a four division display on the monitor oscilloscope g Adjust R344 for four division display see Fig 3 3 3 4 TS LIMITS AND ADJUSTMENTS 16 1 V to 15 9 V R405 15 9 V to 16 1 V R415 18 V to 21 5 V 21 5 V to 18 V no adjustment no adjustment h Set the current Div on the AM 503 to 50 mA Display will now be 8 divisions i Connect a jumper wire between P346 see Fig 3 3 and ground j Examine for a display of 4 4 to 4 6 divisions k Adjust R346 for a display of 4 5 divisions 3 Adjust Compensation Set the following controls as indicated AM 503 CURRENT DIV 5mA Coupling DC Calibration Generator Period 1 Mode Fast Rise Pulse Amplitude Minimum Rising edge 1Vto 0 V Monitor Oscilloscope Volts Div 10 mV Time Div 200 ns a Using a 50 Q cable the special adapter and a 10X attenuator
105. ssembly and or Component Attaching parts for Assembly and or Component Detail Part of Assembly and or Component Attaching parts for Detail Part Parts of Detail Part Attaching parts for Parts Detail Part Attaching Parts always appear in the same indentation as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation The separation symbol indicates the end of attaching parts Attaching parts must be purchased separately uniess otherwise specified ITEM NAME the Parts List 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 ELCTRN ELECTRON NUMBER SIZE ELEC ELECTRICAL ACTR ACTUATOR ELCTLT ELECTROLYTIC ELEM ELEMENT ALIGN ALIGNMENT EPL ELECTRICAL PARTS LIST AL ALUMINUM EQPT EQUIPMENT ASSEM ASSEMBLED EXT EXTERNAL ASSY ASSEMBLY FIL FILLISTER HEAD ATTEN ATTENUATOR LCX FLEXIBLE AWG AMERICAN WIRE GAGE FLH FLAT HEAD BD BOARD FLTR FILTER BRKT BRACKET FR FRAME or FRONT BRS BRASS FSTNR FASTENER BRZ BRONZE FT FOOT BSHG BUSHING FXD FIXEO CAB CABINET GSKT GASKET CAP CAPACITOR HOL HANDLE CER CERAMIC HEX HEXAGON CHAS CHASSIS HEX HD HEXAGONAL HEAD CKT CIRCUIT HEX SO
106. t in a conductor The CURRENT DIV switch is calibrated for use at the 10 mV Div monitor oscilloscope vertical sensitivity However for low amplitude currents less than 2 mA added resolution may be gained by changing the monitor oscilloscope sensitivity to 5 mV Div With the vertical sensitivity at 5 mV Div the AM 503 1 mA Div sensitivity becomes 0 5 mA Div The AM 503internal circuitry in conjunction with a 10X probe has a feature for automatically changing the amplifier gain When the gain is changed for a 10X probe the CURRENT DIV knob skirt illumination changes to display the corresponding switch range If a 10X probe 5 used e g P6303 the lowest range on the CURRENT DIV switch becomes 10 mA Div Again the monitor os cilloscope sensitivity can be changed to increase the monitor oscilloscope resolution for viewing lower amplitude signals 1 4 Insertion Impedance The insertion impedance of the current probe is the equivalent circuit that is placed in the circuit under test when the probe is clamped around a conductor When observing fast rise signals the insertion impedance should be considered to minimize loading Consult the Instruction sheet for the probe in use to find the relationship of frequency to insertion impedance devia tion High Currents When measuring high currents do not disconnect the probe cable from the AM 503 while the probe is clamped around the conductor With the probe cable disconnected un
107. terminated the high voltage developed in the secondary winding of the trans former may damage the current probe When measuring over 40 amperes peak with a 1X probe the AM 503 output may overdrive the monitor oscilloscope vertical display When measuring these high currents change the monitor oscilloscope vertical sen sitivity to 20 mV Div With the vertical sensitivity at 20 mV Div the 503 5 A Div sensitivity becomes 10 A Div Maximum Currents The maximum peak to peak currents approximate in amperes vs signal frequency derating 15 listedinthe appropriate instruction sheet for the current probe in use Current is derated for a continuous signal to prevent excessive heating in the probe head INPUT OVERLOAD indicator light The front panel indicator lights when the measured current exceeds the maximum dc current rating of the probe in use The monitor oscilloscope display regardless of input coupl ing may be inaccurate with the INPUT OVERLOAD lamp lit NOV 1979 Section 2 AM 503 SPECIFICATION AND PERFORMANCE CHECK Performance Conditions The electrical characteristics are valid only if the AM 503 has been calibrated at an ambient temperature between 20 C and 30 C andis operating at an ambient temperature between 0 C and 50 C unless otherwise stated Characteristics Bandwidth 3 dB Full Amplifier Only with P6303 with P6302 5 MHz ac coupled lower limit Rise time
108. the power amplifier when the DEGAUSS button is pressed Output signals from U145 pin 6 drive the bases of Q155 and Q165 a complementary amplifier R159 R156 R160 and R162 form the dc bias network for Q155 Q165 Thermal resistors RT156 and RT160 compensate for bias current changes due to temperature variation CR158 and CR166 are protection diodes From dc to the crossover region the Hall device provides all or most of the signal to the input attenuators REV A NOV 1979 Circuit Description AM 503 Above the crossover region the probe transformer core provides the signal to the input attenuators A feedback system permits the Hall device and transformer core to operate at very low flux densities This is accomplished by applying the output of the power amplifier Q155 and Q165 to the probe transformer coil The current through the transformer coil causes a flux in the core opposite and approximately equal to the flux generated by the current being measured This feedback system permits the Hall device element and ferrite coreto operate at very low flux densities providing excellent sensititivity and linearity Above the crossover region the output of the Hall device diminishes At this time L168 blocks the ac signal from the power amplifier and the cable between the input attenuator and J160 is terminated in 50 0 by C168 R168 The remainder of the resistance capacitance networks R121 R129 R123 and C125 provide smooth
109. the major controls and connectors for operation of the AM 503 are located on the front panel of the unit A brief functional description of each control and connector is included in Fig 1 2 Monitor Oscilloscope The bandwidth required of the oscilloscope used with the AM 503 depends upon the frequency of the signal being measured Oscilloscope vertical bandwidth should be at least twice the frequency of the signal being measured Deflection Conventional current flowing in the direc tion of the arrow on the current probe slider produces a positive deflection of the oscilloscope display Ground clip Leads Ground clip leads are furnished with some current probes to ground the cable shield at the probe end The ground lead is used to reduce high frequency elec trostatic voltages that could couple into the probe and cause errors in measuring A ground lead is normally not used in the lower 1 2 5 and 10 mA sensitivity positions of the attenuator switch because of undesirable chassis currents that may appear in these more sensitive positions When observing high frequency signals use the shortest practical ground clip lead available Output Connection Output connection can be accomplished through the OUTPUT INTO 50 Q connector or the rear interconnec ting jack at pin 28A Pin 28A at the rear interconnecting jack is terminated in 50 Q Connector 4480 located on the 1 2 right side upper rear of the instrument is wherethe
110. to at least 5 V Leading edge aberrations within 296 into 50 2 Fast Rise Output Period 1 to 10 ms duty cycle approx 5096 amplitude range 100 mV or less to at least 1 0 V into 50 2 Rise time terminated in 50 1 0 ns or less leading edge aberrations within 2 during first 10 ns flatness within 0 5 after first 10 ns trigger output terminated in 50 Q positive going signal is at least 1 0 V Frequency range to at least Bandwidth Checks 50 MHz with 50 kHz reference frequency Amplitude range to 4 V p p impedance 50 O amplitude accuracy 50 kHz reference within 3 of indicated amplitude on 5 V range into 1 termination flat ness output amplitude does not Examples TEKTRONIX 7704A with 7A16A Amplifier and 7B80 Time Base TEKTRONIX TM 503 or TM 506 or TM 515 TEKTRONIX DM 502 PG 506 Pulse Generator TEKTRONIX SG 503 Leveled Sine Wave Generator REV B NOV 1979 Specification and Performance Check AM 503 Table 2 4 cont LIST OF TEST EQUIPMENT REQUIREMENTS Description Minimum WL LL uuu u u L _ 5 Constant Amplitude Sine Wave Generator cont vary more than 3 from actual amplitude of 50 kHz reference to 50 MHz Output frequency approx 5 Hz to 1 kHz amplitude into 50 or 5 Amplitude flatness sine wave 1 5 dB throughout required frequency range 6 Function Generator 7 C
111. transitionin the crossover region L202 R202 in series with the 25 Q input impedance of the attenuator terminates the coaxial cable at high frequencies Input Overload Indicator If the output from Q155 Q165 swings about 12 V above or below zero CR168 illuminates Zeners VR166 and VR167 back to back provide approximately 10 V drop from the output of Q155 Q165 Bridge rectifier CR167 provides drive to CR168 on both negative and positive output swings ATTENUATOR Attenuator Source Follower Q230A is a source follower with Q230B providing constant current R220 limits current drive to Q230A gate Dual diode CR226 provides current protection by limiting Q230 gate voltage swing to about 10 V R204 R216 and the attenuator sections provide a constant 25 Q input termination throughout the full attenuator range OUTPUT AMPLIFIER X2 Gain Amplifier This circuit consists of Q310A and B Q315 Q325 and 5 3 Circuit Description AM 503 associated components in a cascode amplifier having a gain of two DC LEVEL control R302 sets the dc level of the output amplifier at the 50 Q output connector J390 Selectable Gain Amplifier gt The selectable gain amplifier consists of U350 gain control R346 and associated components When P346 is at ground potential through pin B of J100 the gain of U350 is decreased by a factor of about two This gain is adjustable by R346 R344 is a gain adjust and R345 is high frequenc
112. tronix Serial Assembly No Mfr No Part Effective Dscont Qty 12345 amp Description Code Mfr Part No 1 ATTACHING PARTS 47 337 2292 00 1 SHIELD ELEC FRONT PANEL 80009 337 2292 00 48 337 2369 00 8010100 8061549 1 SHIELD ELEC CONNECTOR 80009 337 2369 00 337 2369 01 8061550 1 SHIELD ELEC CONNECTOR 80009 337 2369 01 ATTACHING PARTS 49 211 0101 00 1 SCREN MACHINE 4 40 X 0 25 FLH 100 06 STL 93385 ORDER BY OESCR 50 210 0586 00 1 NUT PL ASSEM WA 4 40 X 0 25 STL CD PL 78189 211 041800 00 ATTACHING PARTS 51 105 0243 00 1 ACTUATOR 5 80009 105 0243 00 ATTACHING PARTS 752 213 0214 00 1 SCREN CAP 2 56 X 0 375 SKT HD STL CO PL 70278 ORDER BY DESC ATTACHING PARTS 53 343 0081 00 2 STRAP RETAINING 0 125 OLA NYLON 85480 CPNY 172BK ATTACHING PARTS 54 211 0207 00 2 SCR ASSEM WSHR 4 40 X 0 312 PNH STL 83385 ORDER 8Y DESCR END ATTACHING PARTS 672 0574 00 8010100 8047648 1 CIRCUIT BD ASSY ATTENUATOR 80009 672 0574 00 672 0574 01 8047649 8049499 1 CIRCUIT 80 ASSY ATTENUATOR 80009 672 0574 01 672 0574 02 8049500 1 CIRCUIT 80 ASSY ATTENUATOR 80009 672 0574 02 ATTACHING PARTS 55 213 0146 00 4 SCREW TPG TF 6 20 X 0 312 B PNH STL 83385 ORDER BY DESCR 210 0801 01 8010100 8047648 3 WASHER FLAT 0 14 O X 0 025 THK STL NP 86928 ORDER BY DESCR 210 0801 01 8047649 2 WASHER FLAT 0 14 O X 0 025 THK STL NP 86928 ORDER BY OESCR i ENO ATTACHING PARTS CKT BOARD ASSY
113. uct is intended to operate from a power source that will not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation AM 503 BALANCE CIRCUIT AND gu LOCKED iy tom PROBE CURRENT DIV OSCILLOSCOPE INPUT OVERLOAD OUTPUT SUB BANDWIDTH 2052 9 NOV 1979 Section 1 AM 503 OPERATING INSTRUCTIONS NOTE All references to the P6302 probe also apply to the A6302 probe All references to the P6303 probe also apply to the A6303 probe Description The AM 503 Current Probe Amplifier is designed for use with any of the compatible current probes see Mechanical Parts list for accessories The input attenuator is calibrated in a 1 2 5 sequence and the attenuator knob skirt illumination provides direct indica tion of current division An auto scale switch changesthe knob skirt illumination automatically to match the sen sitivity of the probe used Bandwidth is selectable for either FULL limited by current probe in use or 5 MHz Input coupling is selec table ac or dc ac provides a means of measuring low amplitude ac signals on a high level dc current The AM 503 operates in TEKTRONIX TM 500 Series
114. ur instruments as soon as they are developed and tested Sometimes due to printing and shipping requirements we can t get these changes immediately into printed manuals Hence your manual may contain new change information on following pages A single change may affect several sections Sincethe change information sheets are carried in the manual until all changes are permanently entered some duplication may occur If no such change pages appear following this page your manual is correct as printed NOIL VINHOAINI 39NYH2 Tektronix MANUAL CHANGE INFORMATION COMMITTED TO EXCELLENCE Date 2 21 86 Change Reference C9 0286 product __ AM503 Current Probe Amplifier Manual Part No _ 070 2052 01 DESCRIPTION PG 60 Description This manual insert describes Tektronix mods 51712 58635 portions of 35696 46477 47304 52308 52315 and other manual changes Specification Change Replace the portion of Table 2 1 that is shown on page 2 1 with the following Table 2 1 ELECTRICAL CHARACTERISTICS XK K i Characteristics Performance Requirements Supplemental Information Bandwidth 3 db 503 only DC to at least 100 MHz OUTPUT terminated into 50 Q DC coupled with P6302 DC to at least 50 MHz with P6303 DC to at least 15 MHz 5 MHz 5 MHz 1 MHz ac coupled lower limit lt 7 Hz Risetime full bandwidth AM 503 only lt 3 5 with P6302 lt 7 ns with P6
115. vertical Position control c Set monitor oscilloscope input coupling to dc d Using the AM 503 DC LEVEL control re position the trace to the center graticule line e Set the AM 503 Coupling to DC f Press and hold the AM 503 DEGAUSS button 3 6 g Examine trace positioned at center graticule line h Adjust R152 Degauss Offset see Fig 3 2 for zero volts dc trace positioned on center graticule line i Connect the 3 0 resistor between pins M and N of the AM 503 INPUT connector Set the AM 503 CURRENT DIV fully counter clockwise k Press and hold the DEGAUSS button I Adjust R136 Degauss Level see Fig 3 3 for a 4 4 divisions 0 4 division display This completes the AM 503 Adjustment Procedure J REV A JUL 1980 Section 4 AM 503 MAINTENANCE This section of the manual contains information about preventative maintenance corrective maintenance and troubleshooting PREVENTIVE MAINTENANCE Preventive maintenance steps performed on regular basis will enhance the reliability of the instrumentation system However periodic checks of the semiconductors in the absence of a malfunction are not recommended as preventive maintenance measures See the semiconduc tor checking information under Troubleshooting Techni ques which follows A convenienttimeto perform preven tive maintenance is just before instrument calibration Cleaning The AM 503 should be cleaned as operating co
116. y compensation Selectable Bandwidth Amplifier This amplifier consists of U370 and associated com ponents including HF Comp R363 LF Comp 364 bandwidth selecting switch S370 and networks R370 H372 373 374 With the BANDWIDTH switch in the 5 MHz position U370 output is from pins 6 and 8 through alow pass filter network L380 L383 C380 C383 to Q390 With the BANDWIDTH switch in the FULL position the signal path from U370 is changed to pins 5 and 9 by passing the low pass filter network Q360 is a current source for U370 Q360 current level is established by the voltage level set by Q385 circuitry A common mode signal is fed back from VR380 to the base of Q360 thus minimizing common mode dc bias drift VR380 normally not conducting is protection for U370 5 4 Output Amplifier 0390 and 0395 cascaded emitter followers isolatethe output of U370 from the OUTPUT INTO 50 Q connector J390 Switch S200A CURRENT DIV connects a 5 times attenuation network in the 50 mA to 50 A positions Power Supply The ac voltages from the power module edge connec tor pins 13A 13B 1A and 1B are rectified by bridge rectifiers 402 and CR406 The rectifier output is filtered by C402 and C406 The regulating circuit consists of a dual tracking regulator U410 and two series pass transistors located in the power module to provide regulated 16 and 16 V Q440 and Q470 limit the voltage into U410 to 20 and

AM 503 CURRENT PROBE AMPLIFIER

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