1982 - HP Archive
Contents
1. HEWLETT D PACKARD Functional Analyzing By Jim Bechtold Editor Introduction Functional analyzing usually pro vides the most direct and efficient means of isolating a problem in an electronic instrument As another term for logical troubleshooting functional analyzing is more appro priate and descriptive of the process used in everyday bench service Func tional analyzing is antithetic to shot gun troubleshooting because func tional analyzing involves analyzing the unit in logical sequential steps in order to isolate the defective circuit rather than jumping around replac ing components at random until the problem goes away A bonus to this logical sequential diagnosis is that when you do discover the cause of the problem you acquire a kernel of knowledge that is added to your bank of experiences Then if a similar problem occurs again youcan draw upon your bank of past experi ences and mentally bracket the prob lem area Troubleshooting an in strument by the shotgun method will generally effect a repair but you will gain no knowledge of what caused the trouble since you have only treated the symptom not diagnosed its cause Functional Analyzing Applied to a Real Life Example The last issue of Bench Briefs de scribed the theory of logical trou bleshooting see accompanying box for a thumbnail description and Part No 5952 0108 Bg ee eS H bhi SERVICE INFORMATION FROM HEW2. 312B D SELECTIVE VOLT LEVEL METER 3128 D 7 All serials Troubleshooting procedure to test an intermittent meter circuit 339A DISTORTION MEASUREMENT SET 339A 8 All serials Troubleshooting procedure to test an intermittent meter circuit 432B C POWER METER 432B 3A Serials 1913A and below Improved re placement digital panel meter installation kit HP pn 00432 60116 432C 3A Serials 1906A and below Improved re placement digital panel meter installation kit HP pn 00432 60117 618C SHF SIGNAL GENERATOR 618C 15 All serials Troubleshooting tip for the series regulatorinthe 1000 volt power supply Supersedes 618C 14 dated 5 81 620B SHF SIGNAL GENERATOR 6208 17 All serials Troubleshooting tip for the series regulator inthe 1000 volt power supply Supersedes 620B 16 dated 5 81 1302A 78309A DISPLAY 1302A 4 Serials 1612A 1643A 1721A and 1951A instruments with serials 2102A have the modifica tion incorporated in production Modification kit 01302 69505 and 01302 69506 Option 012 Mod ification kit to improve reliability of the 158 volt power supply 1311B LARGE SCREEN DISPLAY 1311B 2 All serials Notification to check all 1311B Displays for the presence of grease in the P A lead connector The recommended grease is Dow Corning 5 compound Hewlett Packard part number 8500 0059 1311B 3 Modification to prevent arcing of post ac celerator lead in high humidity operating conditions 1311B 4 All seri
3. 45 225 DKZ H4180584E 00301 4180208400101 wtw2 n732 H732 H926 H926 MVS342 HYS342 M0800 001 MAL2 MEIS HE95 HAN 1300 HRN 1300 mu 20 nals wails Im 210 HA 210 wGCL2200 H HGC1L2200 f M41B001ED696G1 MW4393 6C1215 1 54 Notes 1 Replacement P N Status H active HP P N 1420 0228 1420 9234 1420 0235 1420 0236 1420 0257 1420 0218 1420 0239 1420 0240 1420 0 142 201 1420 0242 1420 0261 1420 0261 1420 0265 1420 0265 1420 0268 1420 0269 1420 0271 1420 0272 1420 0272 1420 0277 1420 0278 1420 0283 1420 0284 1420 0284 1420 0287 1420 0288 1420 0289 1420 0292 1420 0293 1420 0294 1420 0295 1420 0295 1420 0296 1420 0297 1420 0298 1420 0299 1420 0300 1420 0574 WWW HPARCHIVE COM MFR NUMBER 05452 R 02967 05452 05452 04910 01394 02967 04135 02967 04304 02967 02967 04304 07371 01447 05469 01447 04304 01447 KGC1215 1 A MA18905CD20G1 KGC 645 1 AHP NGC 695 1 1 k MORLO 0011 P47B025C0 02001 M357 M41BO040 6nA00901 Maln905r05261 HNNAN SA HAN 45 0AAF he TGNAP HTR 2A6 mesa 5105 MK10 HALT M402037 005 um s M418001C03961 M303386 MPK 675 MEVEREADY 1209 0800 0079 H418020BE 00201 M405315 HKOZALLSAA GT1 44189058029 HN4552 H2N 4S50AAF M13126 MT3126 WiOL 125 1 MALBOLIAL 00101 MTRIII HTRIII M40454 H41B01 34600401 M478025FC053 1 10 0004 M081
4. turn on just as the customer had indi cated Milking the front panel re vealed only that all the lights worked except for the display which was blank IN THIS ISSUE Functional Analyzing Battery Cross Reference 1982 Customer Training Calendar Service Notes Hewlett Packard 1982 Logical Troubleshooting The goal of logical troubleshooting is to isolate the defective areainthe instrument in as few steps as possi ble Getting started involves ask ing three questions 1 What is the product supposed to do This may seem simple minded but it wil help you select the required troubleshooting equipment 2 Does the product do what it was designed to do In other words was the customer trying to make the instrument do something it was not designed to do The next step was to see if anyone else had experienced the same problem We could either ask other techs in the area or see ifthe problem was listed in the service manua it was listed We had now completed several pre liminary steps in the logical trou bleshooting process see accompany ing box We had Verified the product was not doing what it is supposed to do Milked the insides and front panel for clues Looked to see if the problem was common enough to be documented The Service Manual s Troubleshooting Section Helps Us Bracket the Problem The manual s troubleshooting section told us to first verify that the raw p
5. Service note index 3586A B C 2A 3586A serials 1927A00231 and below 35868 serials 1928A00284 and below 3586C serials 1929A00195 and below Recom mended ROM retrofit for revision B software 3586A B C 64 All serials 3586A B C HP IB verifica lion program listing and operating instructions 3586A B C 7 All serials Improving 3586A B C 98155 desktop computer HP IB compatibility 3586A B C 8 All serials Modification to eliminate Periodic signal dropouts or noise hits caused by the 3586 s auto calibration feature 3736B RF MODULE FOR 3730B DOWN CONVERTER 3736B 1 Serials 00141 and below Improvement to ensure fast lock up in the tracking mode 3737B RF MODULE FOR 3730B DOWN CONVERTER 37378 1 Serials 00166 and below Improvement to ensure fast lock up in the tracking mode 3737B 2 Serials 00166 and below Change to over voltage protection to prevent damage to transistor A1104 373868 RF MODULE FOR 3730B DOWN CONVERTER 3738B 2 Serials 00141 and below Improvement to ensure fast lock up in the tracking mode 3739B RF MODULE FOR 3730B DOWN CONVERTER 3739B 1 Serials 00141 and below Improvement to ensure fast lock up in the tracking mode 3779A B PRIMARY MULTIPLEX ANALYZER 3779A 22 Serials 2005U and below Modifications to software to remove various bugs and also to add the diagnostic software package 37798 23 Serials 2005U and below Modifications to software to remove various bugs and also to add the diagnostic
6. earlier rectangular LEDs 6942A 3 Serials 2039A 01050 and below Modifica tion to eliminate unwanted self test looping 6942A 4 Serials 2013A00321 and below Recom mended modification to eliminate the cold start syndrome 6943A MULTIPROGRAMMER EXTENDER 6943A 1 Serials 20404 00180 and below Recom mended tront pane change to accommodate round LED indicators instead of the earlier rectangular LEDs 7100B STRIP CHART RECORDER 7100B 10 Serials 2042A and 2043A Recommended replacement pen drive pulley and stop assembly 7101B STRIP CHART RECORDER 7101B 10 Serials 2042A and 2043A Recommended replacement pen drive pulley and stop assembly 7580A DRAFTING PLOTTER 7580A 1 All serials Recommended pinchwheel replacements 8018A DATA GENERATOR 8018A 3 Serials 1826G00825 and below Modification to the A6 memory board and to the A12 memory extention board to improve the timing conditions for the last bit signal L and signal N1023 8405A VECTOR VOLTMETER 8405A 8 Serials 2014A and below Recommended APC UNLOCKED indicator light replacement 8405A 9 Serials 2014A and below Isolation Amplifier transistor replacement to correct poor isolation be tween channels 8411A HARMONIC FREQUENCY CONVERTER 8411A 6 Serials 934 01805 and below Recom mended stripline replacement kit 8411A 7 Serials 930 and below Recommended cable replacement kit 8443A TRACKING GENERATOR COUNTER 8443A 5 Serials 1821A and below Low frequ
7. of half splitting The problem was to take a standard deck of 52 playing cardsandremoveone withoutlooking at it Then determine which it is by asking questions i e making measurements We solve the problem by half splitting where the probability of finding the fault on one side of the split or the other is 50 Therefore the approach would be to repeatedly split the cards into two groups and meticulously zero in on the unknown card How many questions are needed WWW HPARCHIVE COM to determine the selected card The first question can split between two items The second splits those into two for a total of four The next ques tion gets the total up to 8 the next 16 etc Thus 6 questions can pick one item out of a group of 64 since 26 64 JANUARY FEBRUARY 1982 BENCH BRIEFS 9 woplement lO BENGH BRISES N Need Any Service Notes They re free Here s the latest listing of Service Notes They recommend modifica tions to Hewlett Packard instru ments to increase reliability im prove performance or extend their usefulness Use the order form at the rear of Bench Briefs to select the notes that relate to your instruments 197A OSCILLOSCOPE CAMERA 197A 9 Serials 1203A and below UV scale illumina tion bulb pn 2140 0254 is again available from stock 204D OSCILLATOR 204D 3 All serials Manual update to list the correct part number for output attenuator assembly AIR46 HP pn 5061 0760
8. 0 0004 H0225 M418B0134000201 D0SIG 1 MA1BO134D00201 DS3G1 NE1 E1N mys143 mami H4180204600401 HA1B017AG 00101 DS HOR1O 0142 mMA1B020AB 00201 HOS350 4180204000501 HBR 2 3AF 1 wS 225F2 M34640 H1L 0SCB HNA 273C meo0s PC M89511 H MPOLTTEMP 404040 001 HGOLO TOP 4189054004 2 n2136 MKOSALISAAGTL wrRLTS e H M00800 017 HLCR 306P FGCT 1 8 SI HKDAB 111 4A 0G 11 HA 16 H1604 HMP ISG He00S HA1BO20AM00201 HN4292 HN 4SUAMF MIBGA TC 1 2 GRAM LI M0800 0192 MAR 2 3 APL HAm 20 F1 FBR 2 3A WITH 1 172 IN LEADS WRGCK 130 51 JANUARY FEBRUARY 1982 BENCH BRIEFS 7 CUSTOMER SERVICE TRAINING CALENDAR FOR 1982 CONTENT pu o 1611 1615 Microcomputer Development System Model 64000 Order HP No 5955 6290 Scopes and Displays Models 1740A 1741A 1742A 1744A Order HP No 5955 4147 1980 System Order HP No 5955 8046 Automatic Test 3054A C System Verification amp Board Level Repair Circuit Test Systems Model 3060A Option 100 3060A DTS 70 Technology Training Digital Troubleshooting Techniques Microprocessor Troubleshooting Techniques Digital Troubleshooting Devices HPIB Fundamentals for Service Technicians 9500D Automatic Test Systems Maintenance Signal Analysis Models 8S66A 8568A Spectrum Analyzers 141T 8555A 8553B 8552B Spectrum Analyzers 8565A 8569 Spectrum Analyzer DSA Laser SS01A 5526A Laser Transducer M
9. 04 1 6301 1420 0054 05469 Mpx 1312 1920 0054 1420 0019 01447 n 1420 0095 1420 0019 02967 MALBODARE DA 6 805 1420 0020 05469 HAM 12 R 04304 HE 233 05469 HTR 233 01420 tut 01921 MVS 317 04304 KTS 1420 0061 a 05469 In 918 1420 0062 1420 0023 04304 ME 9 1420 0062 1420 0023 05469 KZM 9 1420 0063 1 0024 04504 ME 12 20 0064 04504 HE 426 5 05469 HAM 42R 1420 0065 01420 L kL 0066 0 04304 HNO 482 1420 0067 1420 0027 05469 HRN 401 1420 0067 1420 8028 05469 HTA 164 1420 0067 1420 0029 04304 WE 216 1420 0067 01921 mvs102 1420 9068 04304 H763 Notes 1420 0069 04304 HE146X la 1420 0069 05469 HTRLAGK 1 Replacement P N Tess apas 05469 HTA 289 2 Status H active 1420 0070 6 BENCH BRIEFS JANUARY FEBRUARY 1982 WWW HPARCHIVE COM Manufacturer MacLeod A Handpol Inc RCA Corp Electronic Comp Globe Battery Div Globe Union Inc Duracell International Inc Aglo La Pile SA R L Saft Varta Battery AG Yuasa Denki KK Japan Storage Battery Co Sonnenschein GMBH Panasonic Sanyo Electric Inc Panasonic Catalyst Research Corp Power Conversion Inc Electrochem Industries Inc Plainview Electronics Corp MFR NUMBER 1 X2 MFR P N 04304 HE126 05169 WTRL26 04304 m50s 01420 mris 04304 505 04304 H416 04304 HAST 0371 H362 366 05469 4302651 95469 MTR 132A 05469 MTR 135 R 05469 mamen 05169 W316295 TYPE AMIA 03551 H 05139 05139 03113 HAIN 1 02000 MD 845 C 01447 HCD25 04304 115671 05469 MAMA LS 03113 M1004 05169 HAM
10. 2R 02369 120200 02413 ImP60718 02967 HPPS2677R4 95987 120R200 01447 HT 24 2258 04304 HYS637 04304 111 5511 04304 1 302905 05469 1302905 04304 WE 91 04781 M81415 1447 M40251 01447 05469 MPX 1 01447 M405017 02967 MALBOOAARDIAGA 04304 S09 00029 M1000DK2 04304 HOSS 04781 mic 01447 402908 01420 HFAPL 01921 HvS 009 04304 nm 05469 1 6 05469 HTR 115 01420 HH 1144 04304 1 114 05469 HTR 114R 01420 15500 J HP P N 1420 0071 1420 0071 1420 0073 1420 0075 1420 0075 1420 0075 1420 0075 1420 0073 1420 0073 1420 0074 1420 0076 1420 0077 1420 0078 1420 0079 1420 0080 1429 0081 1420 0092 1420 0082 1420 0085 1420 0083 1420 0088 1420 0088 1420 0089 1420 0090 1420 0090 1420 0091 1920 0091 1420 0092 1420 0093 1420 0094 1420 0094 1420 0095 1420 0095 1420 0096 1420 0096 1420 0097 1420 0097 1420 0095 1420 0099 1420 0100 1420 0100 1420 0123 1420 0201 1420 0201 1420 0202 1420 0202 1420 0202 1420 0203 1420 0203 1420 0203 1420 0204 1420 0207 1420 0207 1420 0207 1420 0208 1420 0204 1420 0209 1420 0210 1420 0210 1420 0211 1420 0212 1420 0212 1420 0212 1420 0212 1420 0212 1420 8215 1429 8214 1420 0214 1420 0223 1429 0224 1420 0224 1420 0225 1420 0226 1420 0226 1420 0227 1420 0227 1420 0228 MFR NUMBER 1 2 MFR P N 01420 04304 01921 04304 04 304 D47A1 04781 05469 05469 04781 06450 01447 04304 05469 06450 02967 04304 05469 01420 04
11. 304 LICER 04304 01447 05469 01420 04304 94304 059A0 05987 01420 01420 04304 02967 04304 ores 05469 02967 04304 02967 063504 01447 02967 02967 04304 02967 06508 02369 02967 07230 02369 02567 01447 02967 04304 01447 02967 04304 01447 01447 02961 01447 02369 02957 05452 07230 01447 06508 06508 02967 01447 02369 02569 02967 02967 04304 04304 02967 04304 01420 04304 05296 03432 035452 02369 02967 02967 04304 06195 07371 06195 02967 02967 01420 04304 04304 04781 04781 05296 05296 01394 01420 04304 04304 05469 55469 01420 D4300 04304 05469 05469 05452 05452 02967 04304 05452 HANG 1222 MVSOTS W912 912 400 n4ao0 In 24F HM 24F 420 HL2N9 48 MCD29 HEVENLADY 92 HANI 400 WAI2 12 MPPS 0850 1522 P HANIADA HNGO nego HNV 134 HOOL99 ITR 11A MLS 206 HCMLSYP MAF0 4 5R6CF MVRO SAA W532 wale K735 H418905C01061 HNaLTS MPA 690 HTRI 46x MA1B001J015 WNS428 M418B8001J014 wNeS27 4402656 M418001 D08G1 H2G6CWS65ST HNS426 H HPE 6 KAROLO 1 3 AA 418901400161 H90312 36 K SS HAROLD 1 34A HA1B901JODIGA 403059 HALBOOSEDI4EL bNA240 M403060 H418004 01361 MN4259 H4032A0 003 HMPTO2W H418004K02761 H405029 IIYPE SR200 M418002FD14 51 MGC 650 1 HIFXSS he02855 HPE 4 6 4 HPE 4 6 4 HPPS2047 M40516 wRIGOST HRISOST wGCT1 SST HGCT1L SS WCH1 8T WCHL 81 M10R400 W10GCuS 5ST M41B0204B00201 IN 4S50AAF
12. C 1 O 7580A 1 O 8656A 12 O 6208 17 O 3060A 31 O 35864 B C 2A O 5316A 1 O 8018A 3 DO 8656A 13 O 1302A 4 O 3310A B 7 C 3586A B C 6A O 5340A 20 O 8405A 8 O 8656A 14 D 13118 2 O 3325A 10 O 3586A B C 7 O 5342A 27 O 8405A 9 O 8672A 7A O 1311B 3 O 3335A 9 C 3586A B C 8 O 5342A 28 O 8411A 6 O 9571A 19 O 1311B 4 O 3400A 11 O 3736B 1 O 5370A 11 O 8411A 7 O 17501A 2A O 1715A 7 O 3435A 7 O 37378 1 O 5427A 04 O 8443A 5 QO 17503A 2A O 1722B 4 O 3456A 5 O 3737B 2 O 55014 8 O 8500A 2A O 37203A 6 DO 1725A 8 O 3456A 6 O 3738B 2 O 5526A 6 85007A 1 oO 64300 1 cC O 3060A 0 O 3456A 7 O 3739B 1 O 6114A 1 O 3060A 5A O 3456A 9 O 3779A 22 O 6115A 1 O 8555A 12A O 64503A 1 O 3060A 14B O 3465B 4 O 3779B 23 O 6129C 4 O 8565A 7 o 64507A 1 O 3060A 15A O 3476A 6 O 4061A 1 O 6130C 4 O 8565A 10 O 64509A 1 O 3060A 16B O 3476B 5 O 4083A 2 O 6131C 4 O 8565A 11 O 64940A 1A O 8566A 15 O 64940 2A O 86633B 1 Please photocopy this order form if you do not want to cut olf the page M dnMHLuv SLYYON 0080 J AIG S94S 0103 All nghts reserved Permission to reprint Bench Briefs granted upon written request to the Editor Printed in U S A 12 BENCH BRIEFS JANUARY FEBRUARY 1982 WWW HPARCHIVE COM
13. LETT PACKARD JANUARY FEBRUARY 1982 iW Ye Figure 1 Mike Keenan HP Technical Specialist substitutes part of a good DVM into a faulty unit as a form of half splitting showed how the step by step proce dure could be used to isolate a problem inthe electrical charging system ofan automobile a rather simple exam ple This article shows how these same basic procedures are applied in troubleshooting a complex electronic instrument a microprocessor con trolled 6 digit integrating digital voltmeter see Figure 1 To document the procedure I sat at the bench with one of Hewlett Packard s repair center technicians Technical Specialist Mike Keenan and observed him use the trou bleshooting procedures we have been discussing on an HP 3455A DVM In less than 15 minutes he isolated the cause of a complete failure to a single component The Customer Complained that the DVM Locked Up at Turn On The first clue of trouble was the cus tomer s complaint that when the unit WWW HPARCHIVE COM was turned on all annunciator lights were illuminated and the display remained blank The DVM would not respond to any switch settings Before Mike applied AC power he removed the covers and looked and smelled for evidence of broken components or heat Everything seemed OK so Mike connected the DVM power cord and switched the unit on in fact he switched it on and off several times The DVM repeatedly locked up at
14. als Modification to improve reliability of the A6 focus board 1715A OSCILLOSCOPE 1715A 7 Seriais 2047A and below Instructions for replacing Plastic T Pack transistors A1A1Q3 and A2A1Q3 in vertical attenuator boards 1722B OSCILLOSCOPE 1722B 4 Serials 2047A and below Instructions for replacing Plastic T Pack transistors A1A1Q3 and A2A1Q3 in vertical attenuator boards 1725A OSCILLOSCOPE 1725A 8 Serials 2047A and below Instructions for replacing Plastic T Pack transistors A1A1Q3 and A2A1Q3 in vertical attenuator boards 3060A BOARD TEST SYSTEM 3060A 0 Service note index 3060A 5A Serials 1801A00100 and up CCD Revision 1938 Modification of contirmation configuration diagnostic CCD programs digit and M0802 for proper 3455A operation during receiver test 3060A 14B All serials CCD modifications for revision 2027 3060A 15A All serials CCD revision 2027 modification of CNTALR program for proper operation during the controller test 3060A 16B All serials CCD modifications for revision 2036 3060A 18 All serials Instruction for configuring the device under test power supply interlock for all power supply options 3060A 25 All serials 11453B Diagnostic Test Fixture correction when operated in conjunction with Option 100 3060A 26 All serials Reduction of system noise effecting CCD system test 135 and similar models of component tests 3060A 27 All serials Revision 2124 of the configuration con
15. and techniques to troubleshoot these technologies e Workshop four hours ofhands on experiments with gates and troubleshooting tools SECOND DAY e Logic Symbology e Positive Negative logic notation e Understanding the implication of logic schematics e Implementation of logic gates AND OR NOR NAND XOR Wired OR e Decoders and their uses e Comparators and their uses e Flip flops R S D J K standard and master slave e Workshop fourhoursofhands on experiments with decoders comparators and flip flops Students will also have an opportunity to use modern tools to troubleshoot faults in a printed circuit assembly WWW HPARCHIVE COM O THIRD DAY FOURTH DAY e Often encountered circuits containing flip flops e ROMs PROM masked E and UV Counters BCD and binary synchronous and ripple e RAMs bipolar and MOS static and dynamic dividers shift registers ring counters e Typical failures and the troubleshooting difficulties e Numberingsystems including binary BCD octal and encountered with ROMs PROMs and RAMs hexidecimal e Typical memory addressing techniques e Introduction to binary math including half and full e Modern display technologies their application and adders common failure modes e Workshop four hours ofhands on time building and e Introduction to the ROM controlled device with debugging counter circuits emphasis on methods used to fault isolate e Workshop four hours ofexp
16. casurement 5420A 5423A DS Analyzer 427A 5451C Fourier Systems amp Maintenance DATES April 5 9 August 9 20 September 14 25 March 1 5 September 20 24 March 8 12 February 22 23 January 4 15 February 1 12 March 1 12 April 12 23 May 3 14 June 6 17 July 12 23 August 9 20 September 13 24 October 11 22 November 8 19 November 29 December 10 January 18 29 February 1 12 March 15 26 April 12 23 May 3 14 June 6 17 July 26 August 6 August 23 September 4 September 27 October 8 October 25 November November 29 December 10 January 11 15 February 1 S March 1 5 April 12 16 May 3 7 June 7 11 July12 16 August 9 13 September 13 17 October 11 15 November 8 12 December 6 10 January 4 15 February 1 12 March 1 12 April 12 23 May 2 14 June 6 17 July 12 23 August 9 20 September 9 20 October 11 22 November 8 19 November 29 December 10 March 22 25 August 10 13 January 18 21 August 16 19 January 11 13 July 19 21 February 24 April 21 September 22 September 20 October 1 January 25 February September 20 October 1 June 21 25 June 14 18 December 11 March 1 5 July 6 16 8 BENCH BRIEFS JANUARY FEBRUARY 1982 LOCATION Colorado Springs Division 1900 Garden of the Gods Road Colorado Springs CO 80907 Colorado Springs Division Colorado Springs Division Colorado Springs Division Loveland Instrument Division 815 Fourteenth S W Love
17. crystal part numbers for the A30 Inguard Logic PC Board 3456A 7 Serials below 2015402161 Recommended modification to increase 33 volt reliability 3456A 9 Serials below 2015A03071 Preferred ROM replacement 10 BENCH BRIEFS JANUARY FEBRUARY 1982 WWW HPARCHIVE COM 3465B DIGITAL MULTIMETER 3465B 4 All serials Table of jumper configurations for line voltage options 3476A B DIGITAL MULTIMETER 3476A 6 All serials Information for exchanging the 3476A A1 PC Assembly using the HP Blue Stripe Exchange Program 3476B 5 All serials Information for exchanging the 3476B A1 PC Assembly using the HP Blue Stripe Exchange Program 3496A SCANNER 3496A 3 All serials Recommend replacement of DUT power supply relays 0490 1129 with date codes 8010 through 8037 3497A DATA ACQUISITION CONTROL UNIT 3497A 9 All serials Instructions for removing the option ROM when making a blue stripe board exchange of the HP IB mainframe outguard con troller board 3551A TRANSMISSION TEST SET 3551A 0 All serials Service note index 3551A 14 Serials 1550408320 and below Cure for auto ranging problems in high frequency and high level applications 3555B TRANSMISSION AND NOISE MEASURING SET 3555B 4 All serials Troubleshooting procedure to test an intermittent meter circuit 3581A C WAVE ANALYZER 3581A C 7 All serials Troubleshooting procedure to test an intermittent meter circuit 3586A B C SELECTIVE LEVEL METERS 3586A B C 0 All serials
18. ency counter replacement kit HP part number 08443 60096 8500A B MICROWAVE TEST SYSTEM 8500A 2A 85007A 1 All serials Troubleshooting aids 8555A SPECTRUM ANALYZER 8555A 12A All serials Frequency response adjust ment after replacement of input mixer assembly HP part number 08555 60072 8565A SPECTRUM ANALYZER 8565A 7 Serials 2027A and below Recommended third converter assembly replacement kit 8565A 10 All serials Improved frequency response performance test 8565A 11 All serials Location of the input fuse to the 30V power supply WWW HPARCHIVE COM 8566A SPECTRUM ANALYZER 8566A 15 All serials Field installation procedure o Option 650 Quasi Peak Adapter Kit 8568A SPECTRUM ANALYZER 8568A 39 All serials Field installation procedure of Option 650 Quasi Peak Adapter Kit 8568A 40 IF Display Section Serial Prefix 1745A and below Modification to prevent oscillation when used with HP 85650A Quasi Peak Adapter 8569A SPECTRUM ANALYZER 8569A 1 All serials Field modification to make the 8569A analyzer compatible with a 7225A graphics plotter and the 17601A 1 O module 17601A serials 1939A and below 8656A SIGNAL GENERATOR 8656A 9 Serials 2124A and below Fan replacement procedure 8656A 10 Serials 2135A and below Modification to correct for spurious sidebands 60 110 MHz VCO 8656A 11 Serials 2111A and below Improved auto matic FM calibration 8656A 12 Serials 2117A and below Modification to reduce 5 6 kH
19. erhaps an HP battery could be ordered and installed at some later date To help you in these situations here s a list of batteries their HP part num bers and the manufacturer s name and part number List of Battery Manufacturers Number Manufacturer Number 00029 Deac 05139 01394 Gates Energy Products 05296 01420 Burgess Inc 05452 01447 Gould Inc 05469 01921 RCA Corp Solid State Div 05980 02000 Muirhead Inst Inc 05987 02369 Gulton Battery Corp 06195 02413 Clevite Corp Burgess Batt Div 06450 02967 General Electric 06508 03113 Eppley Lab Inc 07230 03551 Castall Inc 07245 03602 Sonotone GSD Marathon Battery 07371 03941 Honeywell Inc 08709 04135 Universal Products Inc 08781 04304 Union Carbide Corp 08891 04781 Ray O Vac Div ESB Inc 09593 04910 Union Supply Co 09839 MPD A HP P N NUMBER 1X2 MFR P N HP P N 1420 0001 01420 M5308 1420 0033 1420 0001 04304 H7625 1420 0033 1420 0001 04781 4709 1420 0034 1420 0002 01420 HZJONX 1420 0035 00 04304 14 350 4781 MM 01420 210 04304 1150 05469 1M 13x 01420 HHG 3A 05469 PRA 05469 HTR 233R 316469 05469 HTAZIAR 02369 HU 4200 20 PC20 MOD 03602 HSPEC P M23191 03602 HP N 23957 01447 N4D1108 02967 HA1B001RD1761 05469 HTA 235R 316469 049 1420 0011 03602 H26042 5 1420 0049 1420 0012 03602 H10 204120 1420 0050 1420 0014 01447 1403279 1420 0051 oo 02967 HALAOOAAA LT s52 01447 H400703 049 04304 15 8225T 05469 HAMI2AT 2 05469 HTR 236R 316469 os 043
20. eriments leading tothe building of a functioning strobed display device Logic Analyzers A service oriented course for calibration and The course objective is to teach front panel control opera repair technicians that teaches application circuit tions circuit theory and learn the fundamental compo theory and calibration nents used throughout the unit Other areas covered are the power supply trigger recognition data acquisition and When April 5 8 storage and the display circuitry Where Colorado Springs Division 1900 Garden of the Gods Road The student is guided through the three fundamental Colorado Springs CO 80907 areas of logic analyzers 303 598 1900 Coordinator Mike Fredeen Recognizing a trigger Cost 400 student Storing the data Displaying the data Hewlett Packard Colorado Springs Division is offering Service Training Seminars to customers on most all models of Logic Analyzers The courses are directed to calibration and repair technicians and will teach appli cation circuit theory calibration and troubleshooting to component level repair Attendees should have some prior knowledge of logic and oscilloscope circuits Toward the end ofthe course the instructor summarizes by discussing overall troubleshooting from symptom to re pair The student is shown how to milk the front panel to learn how failures affect the instrument s behavior From the behavior patterns the
21. eswapped the A D boards and used the good DVM A quick check at the test points revealed that both of the reference voltages were low they both measured approximately 0 6 volts The 10 volt reference is used extensively in the input and auto calibration switching circuits and the A D converter circuit The circuit de scription said that if this reference voltage was low the instrument may not complete its auto cal routine dur ing turn on It sounded like we were on the right track The manual referred us to a particu lar schematic that showed the 10 volt reference was derived from the Figure 3 A second good DVM is interconnected to the bad DVM to effectively half split the overall circuits WWW HPARCHIVE COM A11 reference assembly board A por tion of this schematic is shown in Figure 4 Mike surmised that either something in the input and auto calibration switching circuits was loading the reference down or the A11 reference board itself was bad Remember that the A D board had been previously eliminated Mike pulled the A11 board out of the good DVM and substituted it into the bad DVM Using a scope set for DC measurements Mike found that the 10 volt reference was still low The brackets were moved in another notch The only thing left was the input and auto calibration switching circuits located on the A10 mother board i e all the components fed by the 10 volt reference At this point we lost the lux
22. firmation diagnostic software is available under part number 03060 10002 3060A 28 All serials Software BTL revision from 2014 to 2117 3060A 29 All serials Notification of BTL IPG Update Tape for revision 2117 3060A 30 All systems with Option 100 HSDFT Notifi cation of availability of DFT development production software tapes 03060 10101 and 03060 10102 3060A 31 All serials Special installation instructions for installing additional power supply in 34196A power module in conjunction with option 100 3310A B FUNCTION GENERATORS 3310A B 7 3310A serials 1151A 11370 and below 3310B serials 1201A 05020 and below Modifica tion to eliminate distortion in triangle and ramp modes 3325A SYNTHESIZER FUNCTION GENERATOR 3325A 10 Serials 1748A 04251 and above and 1748 04401 and above Notification of new and im proved PC board connectors and cables 3335A SYNTHESIZER LEVEL GENERATOR 3335A 9 Serials 1640A00270 and below Recom mended replacement for the summation loop board A8 or the divider filter board A2 3400A RMS VOLTMETER 3400A 11 Serials 1218A23475 and below Recom mended transformer replacement kit 03400 68701 for older instruments 3435A DIGITAL VOLTMETER 3435A 7 All serials List of user configured line voltage options 3456A DIGITAL VOLTMETER 3456A 5 Serials 2015A02970 and below Recom mended modification for AC relay protection 3456A 6 All serials List of 50Hz 60Hz line frequency options vs
23. it or an even more basic sub stitution is replacing printed circuit boards Mike connected the two DVMs to gether with the test cable using the inguard section of the good DVM to talk to the outguard section of the bad DVM The manual recommended that the DVM with the active inguard section be turned on first which Mike did The faulty DVM proceeded to function in a normal manner which indicated that its inguard section was bad Just to make sure we reversed the cable and used the outguard sec tion of the good DVM and the inguard section of the bad DVM The original fault appeared in the good DVM The Manual Recommends Further Half splitting Within the Inguard Section The inguard troubleshooting section related that the turn on fault could be on the mother board and or on a plug in A D converter board and rec ommended replacing the A D board as the first check We removed the A D board from the good DVM and substi tuted it into the bad DVM The fault was still there so we reset our brac kets another step closer to the failure It seemed that we were zeroing in on the mother board The manual told us that the next step was to check the clock signal at A10U26 pin 27 U26 is the inguard microprocessor and the clock signal is used by the inguard controller cir cuit Mike hooked up his scope and checked the 4 volt clock signal It was OK The next step was to check the 10 voltreference at A10TP7 and TP8 We r
24. land CO 80537 Loveland Instrument Division Eastern Sales Region 7121 Standard Drive Hanover MD 21076 Loveland Instrument Division Loveland Instrument Division Instrument Support Division 690 E Middlefield Road Mountain View CA 94042 Instrument Support Division Instrument Support Division Instrument Support Division Instrument Support Division Santa Rosa Division 1400 Fountain Grove Parkway Santa Rosa CA 95404 Santa Rosa Division Santa Rosa Division Santa Clara Division 301 Stevens Creek Blvd Santa Clara CA 95050 Santa Clara Division Santa Clara Division WWW HPARCHIVE COM TUITION 400 student 1 250 student 350 student 400 student 250 student 2 500 student 2 500 student 1 250 student 2 500 student 350 student 350 student 350 student 200 student 2 000 student 700 student 400 student 400 student 700 student 700 student 700 student a COORDINATOR cC Jerry Lopez Jerry Lopez Dick Browne Dick Browne Larry Carlson Sandy Selleck Sandy Selleck in Loveland Sandy Selleck Sandy Selleck Debra Mazenko Debra Mazenko Debra Mazenko Debra Mazenko Debra Mazenko Jim Boyer Jim Boyer Jim Boyer Lorraine Pineda Lorraine Pineda Lorraine Pineda More on Logical Troubleshooting The last issue of Bench Briefs con tained a demonstration problem that was designed to prove the power
25. ower supplies were working prop erly Mike checked and the power supplies were fine The next troubleshooting step told us to half split the instrument since either of its two main sections could hang up the turn on sequence 2 BENCH BRIEFS JANUARY FEBRUARY 1982 3 Have you or anyone else seen the problem before Or is the symptom listed in the service manual Many times there is a list of troubles and probable causes in the manual s troubleshooting service section The next logical step is to milk the instrument for all symptoms avail able Use your eyes ears and nose Then you want to bracket the prob lem which is simply a means of es tablishing broad limits around the areas to be tested This usually in volves the next step which is half splitting Half splitting involves making checks at the midpoints of the Explanation This DVM iselectrically and physically divided into two major sections with two major printed cir cuit boards The inguard section which consists of the measuring cir cuitry a controller and power supplies and the outguard section which consists of most logic circuits and their power supplies The out guard circuits function as the internal main controller HP IB interface and front panel interface of the instru ment see Figure 2 remaining parts of the circuit that have not yet been checked until you find the faulty portion of the circuit In conjunction with half split
26. requency signal input 5342A MICROWAVE FREQUENCY COUNTER 5342A 27 Installation of extended dynamic range Option 003 retrofit kit part number 05342 60201 5342A 28 Installation to Digital to Analog Conversion DAC Option 004 retrofit kit part number 05342 60202 5370A UNIVERSAL TIME INTERVAL COUNTER 5370A 11 All serials Recommended addition to tront end checkout procedure 5427A VIBRATION CONTROL SYSTEM 5427A 04 All serials DAC Diagnostic Program procedure 5501A LASER TRANSDUCER SYSTEM 5501A 8 Recommended cleaning procedure for opti cal instruments 5526A LASER MEASUREMENT SYSTEM 5526A 6 Recommended cleaning procedure for opti cal accessories 6114A PRECISION POWER SOURCE 6114A 1 Serials 1928A 02290 and below Preferred replacement for the thumbwheel assembly 6115A PRECISION POWER SOURCE 6115A 1 Serials 1937A 01000 and below Preferred replacement for the thumbwheel assembly 6129C DIGITAL VOLTAGE SOURCE 6129C 4 Serials 1943A 00658 and below Modifica tion to correct output amplifier A7 oscillation 6130C DIGITAL VOLTAGE SOURCE 6130C 4 Serials 1949A 01670 and below Modifica tion to correct output amplifier A7 oscillation 6131C DIGITAL VOLTAGE SOURCE 6131C 4 Serials 2114A 01160 and below Modifica tion to correct output amplifier A7 oscillation 6942A MULTIPROGRAMMER 6942A 2 Serials 2039A 1050 and below Recom mended front panel change to accommodate round LED indicators instead of the
27. software package 4061A SEMICONDUCTOR COMPONENT TEST SYSTEM 4061A 1 Serials 2043J00154 and above Software re vision from version E to version F 4083A SWITCHING CONTROLLER 4083A 2 Serials 1920J00171 and below Modification to improve HP IB control 4191A RF IMPEDANCE ANALYZER 4191A 2 All serials Troubleshooting instruction when using the 16341A Logic Test Box 4274A MULTI FREQUENCY LCR METER OPTION 101 HP IB INTERFACE 4274A 16 Serials 1850J00143 and below Modifica tion to prevent malfunction in option 101 HP IB interface 4275A MULTI FREQUENCY LCR METER OPTION 101 HP IB INTERFACE 4275A 13 Serials 1843J00111 and below Modifica tion to prevent malfunction in option 101 HP IB interface 4304B DC VOLT AMMETER 4304B 1 All serials Installation instruction for the re chargeable battery Option 001 4328A MILLIOHMMETER 4328A 8 All serials Installation instructions for the re chargeable battery Option 001 4961B PAIR IDENTIFIER FIELD UNIT 4961B 4 All serials Troubleshooting instructions for the UART A4U4 1820 1681 5001C MICROPROCESSOR EXERCISER 5001C 1 All serials Operating instructions regarding the READY line from a unit under test to the 5001C 5316A UNIVERSAL COUNTER 5316A 1 All serials Troubleshooting instructions to find Channel C relay problems 5340A MICROWAVE FREQUENCY COUNTER 5340A 20 Serials 2116 and below Modification to prevent a random gating flaw 40 GHz indicated for a lower f
28. student learns how to isolate the fault to a particular function within the instrument and finally to the faulty component Ordering Information All courses must be ordered through your nearest HP Sales Office If you desire addi tional information about a specific course contact the coordinator at the course location WWW HPARCHIVE COM JANUARY FEBRUARY 1982 BENCH BRIEFS 5 Battery Cross Reference When selecting a replacement bat tery for your HP product you may notice that your manual will lisi only an HP part number even though it appears that this part is actually a standard battery Service personnel often ask why only HP part numbers are used It is a form of quality control By listing only HP part numbers we are recommending that HP replacement parts be used to ensure that original performance of the product be re tained While some batteries used in HP instruments are identical to those that can be purchased at a local elec tronics distributor many batteries are either specially manufactured to HP specifications not available over the counter or mechanically altered to fit certain HP applications However there may be situations when you have a dead battery and therefore a dead instrument and HP replacement parts are either not in stock or will take a few days to obtain In these cases it may be worthwhile to see fa substitute battery will work in the circuit P
29. ther schematics Mike replaced Q34 and turned the HP 3455 on The DVM did not lock up and appeared to function properly Mike pressed the self test button and the DVM passed with no other problems The Same Approach is Used to Troubleshoot Any Circuit The example wecovered concentrated on isolating a problem in a complex digital voltmeter The basic principle was to isolate the one defective stage in the circuit by confirming all of the other stages were working properly We accomplished this through half splitting And the same simple prin ciple will work in most any type of circuit Remember that as you are half splitting and moving those brackets ever closer to the fault you are learning the instrument and picking up those kernels of knowl edge for future use Figure 5 Q33 was biased full on and Q34 was shorted Therefore the 10 volt VREF was drawn to near ground potential 0 6 volts Customer Service Seminars Digital Troubleshooting Techniques An intensive short service oriented course that introduces modern digital technology to the analog repairman When March 22 25 August 10 13 Where Instrument Support Division 690 E Middlefield Rd Mt View CA 94042 415 969 0880 Coordinator Debra Mazenko Cost 350 student FIRST DAY e Analog vs digital e IC Technology DCTL RTL DTL CTL TTL ECL EECL HTL MOS I2L 4 BENCH BRIEFS JANUARY FEBRUARY 1982 e Specialized tools
30. ting you will want to use the informa tion funnel approach i e deciding what type of check to make that is most appropriate to the size of the trouble brackets at a given time Performing the checks in this fun nel sequence assures you wide cov erage of trouble possibilities initially but with low precision Then gradually as you proceed to localize the trouble the checks be come more precise The Manual Recommends a Second Working DVM for Effective Half Splitting Both the inguard and outguard sec tions have their own separate micro processor controllers that handshake back and forth Both sections are in terconnected through a single cable that can be easily unplugged The manual troubleshooting procedure recommends using a test cable avail able from HP and a second func tional 3455 DVM The test cable is Figure 2 This complex DVM can be easily half split where the inguard and outguard sections are interconnected at point A WWW HPARCHIVE COM used to connect the inguard section of the good instrument to the outguard section of the bad instrument or vice versa In this manner the faulty DVM is half split and the bad section in guard or outguard is quickly iden tified Refer to Figures 2 and 3 Editor s Note This same principle can be applied to many instruments even if they don t have a convenient intercon nect cable For example in some cases new power supplies can be wired intoa circu
31. ury of half splitting since most of the components were parallel at tached to the reference line Shotgun or Logical Analysis Mike looked at the circuit and found several likely suspects At this point he could have fixed the problem using the shotgun technique replace groups of components until the 10 volt reference improved or he could approach the problem logically and methodically until he found the fault The difference of course would be that when he logically found the prob lem and diagnosed its cause he would add that kernel of knowledge to his bank of experiences The shotgun method would only treat the symptom In other words the next failure of this type that Mike came up against he still wouldn t know what caused the problem We lifted a couple of diodes in the circuit that could have been shorted and then unsoldered a transistor that isolated a portion of the circuit No luck Then Mike realized that 10 volts was being drawn down to 0 6 volts which was almost ground He looked for and found Q34 a transistor that if shorted or leaky would draw the 10 volt reference to ground Refer to Fig ure 5 When we lifted one leg on the transistor the voltage came right up JANUARY FEBRUARY 1982 BENCH BRIEFS 3 lt Figure 4 A portion of the 10 volt reference circuitry Note that the 10 volts is used by the A D converter as well as input and auto calibration switching circuits all shown on o
32. y procedure Possible damage to the Programmer Module during per formance verification 64940A CARTRIDGE TAPE SYSTEM 64940A 1A All serials Recommended procedure to prevent cartridge tape despooling 64940 2A Instructions for overcomming tape transport system verification errors 85007A DISPLAY GENERATOR 8500A 2A 85007A 1 All serials Supplementary in formation on machine language programs as trou bleshooting aids 86633B MODULATION SECTION PLUG IN 86633B 1 Seriais 1851A and below Modification to prevent a remote programming controller hang up JANUARY FEBRUARY 1982 BENCH BRIEFS 11 Service Note Order Form x If you want service notes please For European customers ONLY Name SSS g check the appropriate boxes below and return this form separately to Hewlett Packard Firm UU S lt Ox o D a one of the following addresses Central Mailing Dept Addroka P O Box 529 Hewlett Packard Van Hueven Goedhartlaan 121 City 1820 Embarcadero Road AMSTELVEEN 1134 Palo Alto California 94303 Netherlands i i O 197A 9 O 3060A 18 O 3496A 3 O 4191A 2 O 6942A 2 O 8568A 39 O 204D 3 O 3060A 25 O 3497A 9 O 4274A 16 O 6942A 3 O 8568A 40 O 312B D 7 O 3060A 26 DO 3551A 0 O 4275A 13 O 6942A 4 O 8569A 1 O 339A 8 O 3060A 27 O 35514 14 O 4304B 1 O 6943A 1 O 8656A 9 O 432B 3A O 3060A 28 O 3555B 4 O 4328A 8 O 7100B 10 O 8656A 10 O 432C 3A O 3060A 29 O 3581A C 7 O 4961B 4 O 7101B 10 O 8656A 11 O 618C 15 O 3060A 30 O 3586A B C 0 o 5001
33. z spur offset from output frequencies of 99 9993 and 899 9993 MHz 8656A 13 Serials 2111A and below Modification to reduce 140 MHz spur with an output frequency of 80 MHz 8656A 14 Serials 2111A and below Modification to reduce spurs 17 37 and 42 MHz offset from output frequencies of 1 to 123 5 MHz 8662A SYNTHESIZED SIGNAL GENERATOR 8662A 4 Serials 2107A00680 and below RF output connector modification 8672A SYNTHESIZED SIGNAL GENERATOR 8672A 7A All serials New part number for A1CR1 leveling detector 9571A DTS 70 SYSTEM 9571A 19 Software serial numbers 2100A00100 and above 91075D E F J K L Software System Rev 2100 17501A AND 17503A PLUG IN MODULES 7100B and 7101B Strip Chart Recorders 17501A 2A 17503A 2A Serials 717 and below Elec tric writing compatibility 37203A HP IB EXTENDER 37203A 6 All serials Preferred replacement of IC A1U55 New part number 1820 0681 64300 LOGIC ANALZYER 64300 1 Serials 1927A00051 thru 1927A00077 Mod ification to prevent logic analysis trace errors 645XX PROM PROGRAMMER 64503A 1 Repair numbers are not assigned to this model Equipment safety procedure Possible damage to the Programmer Module during per formance verification 64507A 1 Repair numbers are not assigned to this model Equipment safety procedure Possible damage to the Programmer Module during per formance verification 64509A 1 Repair numbers are not assigned to this model Equipment safet
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