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Keysight Model 66000A MPS Mainframe

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1. 99 C42 R115 Q 00000000006 21 Q us 553 1140150000500 9 010000000 ooo 90000000 5 00000000 y 0000000000 alo ol Hooooooo Hooooooo0 000 Hooooooooo 66 G R1275L o c R124Fo CO QOOOO Dooooooooo 126 Qgjoooooooo 0000000000 50 50 40 10 5 aco YCC 20 015 HEADER a 17 ACI DB I 00 D i TOP VIEW 13 DLoG 8 A B7 02 43 Ero 1116 C33 25 1 45 2 B6 poi ioe pa tS 0 52 19 ROM 5 6 aca Bs pHS 34565 03114004 LA a4 e Js s nn 15 4 B4 94116 z5 roa 15 D 17 DUARTE as ace 5 5 00 J5 6 BS 05112 05120 HPIBE ee a ace 25 7 060 5 8 ga pa 18 37 Dro 11 pci F4 peos 111000 19 3510102 06
2. E 8 ciuile 8 Safety Considerations RERO ERR UE OD RUE MD E 8 Blectrostatic DISCharge T OS 9 Service Tools and ke 9 Verifienliipi e A N A 11 Preliminary 11 POWER ON Checkouts E 12 Selttest Sequence z bene e ie re RP et uska Ae 12 In Case db ce 12 Outp t ChecKo0tu 14 In Case of Trouble liada 14 Problem Not Idemtitied RIO WE OS E ERES RES 14 Disassembly a Nic 15 Disassembly Procedures PC 15 Removing the Modules and Module Connectors eese nennen nennen nenne etre nete enne 15 Removing dep 15 Removing ET iaa 15 Removing the Front Bezels and Keyboard Plug nennen nennen rennen enne 16 Removing the Rear usss ays 16 Remoyine the PC Boards e 16 Reassembly Procedures E C M 17 Installing
3. HPH 17 Assembling the Rear Subchassis reet tte 18 Assembling the Keyboard Plug and Front 5 442 4 4 1 200000000000000000000 18 Assembling the Front Prams Cm 18 Assembling the t n tibt eee OD 19 poeni P 21 Bron 21 Accessing the PlOWCNAMMS E 21 If You Experienced a Selftest Failure dens ao 21 If You Experienced Other Problems With the 2 eren rennen 22 Troubleshooting Flowcharts eerta eene wei s S ERES ER EYE 22 Replacement Parts Mee 33 DEDE MM nU Ei 39 Test Point and Component Location Diagram enne nennen trennen coreana can nc enne ancianos 39 Board SChematics C 39 Sheet T Circuit Functions eser RURSUS ERE UR Eee cha IE Su PORE Stk a 39 Sheet 2 Circuit FUNCHONS RENE DRE 39 sheet 3 Circuit Eunctions ee eec rto oaa ieu E Mie Ee RR ee RO 40 Backplane Board Schematic
4. 7 J122 J10 C53 096 90 C91 dose 042 04 5 ACSW 28U A UR16 270 a 28UF 9122 4 94122 5 234J122 6 234J122 15 234J122 16 234J122 17 47122 18 gt 122 19 4122 20 J120 1 120 14 gt 7120 20 J120 2 5120 8 234J120 19 p 4J120 4 9J120 5 4120 17 gt J120 3 9J120 18 1 28u J200 1 J200 3 80182 ES S0186 10K 058 1N4150 ZND56 1N4150 td 1 3e4 ct 50106 ZND25 1N4150 MAIN BOARD 66000 20020 SHT 3 OF 3 egur 28VF egur 28Uf 28Uf 280 28Uf 28Uf 1 17 TIN 33 24 3 18 TOUTF 9 ACSW 25 1 4 10 26 42 11 ACCSW 271 431 12 C 28 13 ac 29 7 451 147 30 46 15 31 47 ACC 16 ze E 48 Ji sLoTo 2 sLotz 45 SLOT4 J7 SLOT6 eBue B J10 1 emm 1 ACCSW 1 MODIDC4 4 SUf J10 14 J12 2 acsu tt See 2 L 3310 20 Bere 3 PES 3 RXF 2 3 L e o 2 J12 4 gt J11 4 ALON S 39 4 gt J10 8 J11 5 I XEC4 1 5 L 5510 19 11 6 IXFt2 6 AA 4 MODIDCIO 7 5 5
5. C M HH M E 23 TRA ERI nae eid 23 30 enia nad RH 23 30 31 Pere a eic IMP S Ls 23 30 31 ju duddoeests 30 31 u E 32 TPT aou QU 32 TO hts E add EE 32 DagIn EnsOut 27 troubleshootimp s 21 flowechartS z uyu eerie tee reet niei n ae 22 PA o a e M M M E MM 26 Apud M H 26 A tuna eoe nune AUAM AER na DAN E UE 23 w WIRES a ie ent atat tet ansa tertio Nt ba sab a aa pass 32 Index 53 This information is subject to change without notice Keysight Technologies 1992 2000 2014 Edition 2 December 2014 KEYSIGHT DD TECHNOLOGIES 66000 90003 www keysight com
6. est n en eo 13 Overall troubleshooting ertet o e rire ee te ipe DERE E e HER eR Ee 23 P POB o 31 10 11 pow r module siny etn HERR IR GV ERE IM 7 PSRQ Pulse Trad Testi dat genet Be eee RERO HH de 26 R nOD Oeo ORT Omen 32 er dub D 17 uir e p UR p ip RUD 8 RIB iki lel a ei eee tee 27 ROM et enn onm E UT aves Ip DR a Aasmaan e p n 32 a 26 RXKB aaa uuu sab 23 52 Index u uuu za RORIS eer eee 23 24 25 27 SASTRE 24 25 26 27 28 schematic MOLES tete te i t ott ete t dieti udi Stee at pata 41 schematics a ccs ovens etek evn cates ene Eder e 39 Backplane o nne npe e eom ple ttes 40 MAIN DO ATA RENE D DU UU 39 dizi Hx 12 Serial Tank er REGIOS OI HMM 28 sertal EC 8 sService manual 5e nato CR o iet veis t pv is eni ener 8 shocl hazards a MI TE atento anion e 21 39 T TNE lena 28 O NE MR M 9
7. I 200 I R161 L I c9 1 1000PF 1000 I I t s I a 5 B 8 I UREF e c5 239 gt OUT I R4 1 63V I S hs i GUARD c15 COMP i I gt RCT 509 AX 046 UCN3844N 9 3 SENSE 6 1 62K C4 C3 2x UR17 gt 3K N 300 0 1 420PF GND V Ax 5x 560 100U R7 Ve 3 01K 50 ac TARET DIGITAL A BOARD 66000 20020 SHT 2 OF 3 4122 14 122 7 4121 20 4121 19 J121 1 lt 5 MODID lt I S01B5 lt 0 2 501684 J121 8 J121 10 J120 10 J121 2 50206 gt C UR1S 6 20U 1 ACCSW 505506 lt I 50185 4 15 181 186 J121 14 RXFCS 14 J121 12 J120 1 J122 12 RXF 6 13 R 12 13 ACON 122 9 ACONC1 5014 1 SEL 191 126 4 5 6 2 5 SEL 2 J121 4 J121 1 ACONWR 50184 J122 10 CA s0187 TXF 5 J122 11 a TXF 2 6 TXFC3 2 SEL 2 Ji21 1 TXFC4 et 5 J121 7 74HC259 TXF 6 11 7 12 J120 9 IAREMA S0186 50 500 C64 i Joso 155 Je 047 047 047 047 500 FRAME BACKPLANE J120 J11 J121 J9 047 047 50
8. Stat 10 10 10 Pulse Figure 4 1 Overall Troubleshooting Sheet 2 of 7 24 Troubleshooting Use the HP IB switches to select a 8 test to perform The 8 available tests can be performed in any order by satting the GPIB switches as 000SSS MS8 LSB SLOT 0 SLOT 1 SLOT 2 SLOT3 J122 12 to J122 14 J122 T to J122 9 J121 17 to J 121 20 4121 4 to J121 19 Backplane Power up Test NOTE The Backplane Power up Test and Backplane Serial Port Test use the 3 LSBs to select the slot number to test Does keyboard display indicate ID Test Verify Pulse Pattem on SACLK ACON ACONWR and MODID Are Pulse Patterns present Select Another Test SLOTO J122 8 to J122 10 SLOT 1 J122 11 to 1122 13 SLOT 2 Jt21 3 to J 121 6 SLOT 3 J121 2 10 J121 15 install jumper for siot to be tested and set swilches for thal slot 101555 MSB LSB Backplane Serial Port Test Use the 3 LSBs to select the module Slot number as shown in the table above keyboard display indicate Backplane Serial Port Test Select Another Test Install jumper for siot to be tested 1 10 and set switches for that slot Go00400009 20 095222225211 Disconnect SASTRT J5 3 from GND J5 2 SLOT 4 SLOTS SLOT 6 SLOT 7 4122 4121 1 to 3121 16 4121 8 to 1121 13 3121 10 to 3121 11 4120 10 to 4120 11 J121 6000006066 J120 Qooeoosooa 20800 0000 HAZARD AC LINE VOLTAG
9. 15 C18 3 DFIF 28 A JACK 1 S01A7 HS00 A11 a 4 HL SRE 50185 25151 nio DC0 7 BU 007 TELE fs 4 MSTX 5013 S01027 UINT 24 iSto 5 Sov C162 C100 2 38 50 7 Jii R LI V zs P2 7 1906 042 99 C101 FooopF C102 Z NDS o xg Pe 6 ALE C Ve 5 gt 4 64 1000 7 5 SAEN E 55 pz 19 2 lp Ropa EL RXKB 1000PF Zzpr 6 20U J5 1 P2 4 AD D 1Q D 16 30 100U 100U 44 54 DC6 18 ace Di TxDA 22 TXKB 2 Pos 40 2017 Diz 24 0105 HINT 15 5 5 aps 55 pes py B DC 17122 097 RXF 56 504 4D 9 aca 05 I 5 50306 TXF ADA P pozo 6 15 A DCc4 23 p Y 801 2 TxD 52 DG oO 21 haa pcs 18 05 IPe du 55 o 044 eoo Po 160 Sola pcg 22 V RE 8017 PREN P0 2 590 Loc 70 haa 1906 12 5 02I 8 60 pco 0 9 12 aco D7 0 1 56 DO a 600 oni eg Bi s ALS573 aco 1 13 04 32 SACLK R0 05 P0 4 7 5 8 3 41605 pi 631 SeSTRT ys 5 ace las 091 2 06 9 30 SASTOP 68681 ds 07 PS ao 5 AC3 pia cA 8 10 MsRx S03A3 S01M4 C6 E 6lpo o P1 322 ACONUR p Rewe SESE MSTX 211561 0 50 15 p 2121 SEL 50506 SU 55 50186 x 1 19 R185 as HE asno Pii SEL R165 50185 race UN er 5012 Heist 3MHZ 0
10. RDY 650165 Dci 1e B1 D1 0101 7 HINT 001 8 D 13 1 50185 zo lE WR x 151002 89 57 8 S RD 41 16 D04 10 23 acai 004 A11 A RS1 D 17 5 5505 aco 1 18 005 R12 15 OCA 2 062 5006 813 55 8 INT Dt ars ALLA TRIG 815 RCCRG gt DE 19 22 ACTER Osi REN RENG gt REN l 3e 16 25 gt NRFD RED 17 24 NDAC ES 6 ADAC DBI DAY Z6 DAU EOI hs ak jig 50182 ao 10 aco RES 50186 2074 ple aca sele SPG 22 55 pole aca 75161N GND HR e7 asl 3 3 GND 20 Q4 8 4 10 IS acs ae 4 Y ec A ace Dco tooo az nc D 18 25 aca J1 PINS 25 26 C164 ISRG 60107 x Tee ETETE CONN MTG HOLES SEEN D 151005 100PF L 50185 DOS A10 mE 1000 m 50 TED 12 094 011 55 Bt CE 005 12 80187 DcG 185065 2 26 acia va 19 1 GUARDING JS 4 Di Nc L 8C142 5UK Yi C87 1088 6264 R20 R21 u52 4 64K 4 64K J126 1 500 R153 J5 2 100 5x J126 4 3zpr 1 g 100U 100U 67 UCC R152 J126 5 XTAL1 EBHE AAA 100 5x J119 50 S6 ixTAL2 C10 11 1 RD TELE RIB 2 T1000PF 2 V7 0303 gt 36 1505 13 1000 1000 3 vee rene 25 04 12 A15 gt er 34505 814 ES e 87 i 50187 SRO HSU2 6 3 M SEN 29 6 Pos 2 C17 ps HS01 2
11. nani conse ERE A KE TEE Posee 40 Exploded View DIT ii ae iia 40 Schematic Notes mE 41 Manal uuu p 49 MU 51 Overview About This Manual This manual is a complete guide for servicing the Keysight 66000A Modular Power System MPS Mainframe Troubleshooting information for the Keysight 661xxA MPS Power Modules is provided in the module service manual see Related Documents which should be used with this manual Note Troubleshooting the Keysight 66000A MPS Mainframe requires the use of one working Keysight 661xxA MPS Power Module This manual is organized into the following major sections e Overview discusses safety and equipment considerations to be aware of when troubleshooting It also lists the tools and equipment required for troubleshooting e Verification consists of a series of tests that are used to help isolate a fault It includes the selftest sequence that runs automatically at power on and verifies the integrity of the microprocessor the GPIB and serial interfaces and the memory e Disassembly procedures are used to disassemble the instrument for repair e Troubleshooting procedures systematically verify selected circuits to isolate the cause of a problem Suggestions for remedying the problem are also provided Troubleshooting procedures are provided for the following circuits Bias Sup
12. 32 aa 27 Pulse eran e aou c o QR 27 PARRI Test Connector e brit et te tomis ric tbe ster ARR 26 disassembly COVED ies accen bio e bei cete oe ce ebd leto oci ce E ED deed 15 Ede ER 15 modules EE re pesce ipee o e e Ee 15 s sets 16 SUDCHASSIS e i reete ertet ee nene eee el egere ee vete Shan eleg bee SSS usss u pert tes veda asss 16 documents related Een eR QV e A E Ue PIS 8 E electrical parts Dep POPE 34 electrostatic discharge diede ertet 9 EQUIPO 9 CLLOL 1019 MEET 12 Index 51 gees 1 UO ep EU 30 o 31 G GPIB Switch Test ise e Det RUP bise rd 24 H 26 K Keyboard d 10 12 Keyboard Display Test dco dee EI din cape 29 Keyboard Echo Test ndr e ree e te E E e ge E OSEE GE E E ESE EEES 29 L TNE VOM ASE EE 11 M mechanical o en Opt A Ran 38 ec o 32 MODID S eU be Be A ban a 25 Checkout sx
13. 50102 210 7 8 N C141 SEL 0 2 21 reale 1MHZ 3 F6HZ 464 57 RESET 90206 INTR IPS CS0187 R11 50185 Fs 1 1MHZ 501C7 A3 Ho000PF 14 UPP TACK 0 4 27 26 S0303 2413 Fa 16 5SMHz 50163 1000 uss 32 opstt4 50185 2 14 Fa 12 HSRO S012 R1ZSTINB 60104 BD L 45 READY 35119 ape 26 R174 IS Fe E INST 15 BPD gt J120 6 Brice ra 750195 pE eJ 91589 MZ C140 V 5 19 BUSWIDTH 5 80C196KB GAL 1608 A Js V USS2 0551 100v E N BORRD BPDFIEN 07 15 00 SHT 1 OF 3 8 Z 6 5 4 3 2 1 D45 R17 Te Ja 9 ANN gt gt 64 D26 C110 13 10 56 2K 1N5406 500 5 C135 D32 280 T3 El 2200PF 250U 50305 145406 o 4 20 9 D I _ C85 T 390 0156 R169 051 4009 I La 50505 3 10 i 25048 050 iC I 8 o CHRSSIS I a 145406 i 4700PF i 2500 I 1 ES C116 0 C108 IHS1L 2 12 AWG PAD T3 R131 R132 J Re 2500 as 150 57 193 51 1 ES aN 10 4 ht chasszs i lt si c2 l i 1N4150 chassis 20 5000 I i I i i R14
14. EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES KEYSIGHT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contracts product maintenance agreements and customer assistance agreements are also available Contact your nearest Keysight Technologies Sales and Service office for further information on Keysight Technologies full line of Support Programs SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation of this mainframe Failure to comply with these precautions or with specific warnings elsewhere in this guide violates safety standards of design manufacture and intended use of the mainframe Keysight Technologies assumes no liability for the user s failure to comply with these requirements GROUND THE MAINFRAME This product is a Safety Class 1 instrument provided with a protective earth terminal To minimize shock hazard the mainframe must be connected to an electrical ground The mainframe must be connected to the ac power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding
15. MSB LSB 8 SACLK eyboard display indicate Check switches S7 TrigIn TrigOut Test are set correctly Select Another Test Figure 4 1 Overall Troubleshooting Sheet 5 of 7 Troubleshooting 27 FROM Previous Test Switch setting for Serial Link Test 010001 MSB LSB Check switches S7 are set correctly TinF U58 14 5V Verify Pulse Pattern on TinF U58 14 20 us div dc coupling 140 uS period is Pulse Pattem present Check USB 180 034 35 D56 57 and VR11 Yes Select Another Test Disconnect SASTRT J5 3 NOTE from GND J5 2 if connected Leave Service Mode jumper and set switches to select test installed Does eyboard display indicate Check switches S7 Serial Link Test are set correctly R98 SNOW Verify Pulse Patterns on R98 and R100 R100 7 endi 50 us div dc coupling Are Pulse Patterns present NO 2 Check U58 U89 and U91 3 Check for clock pulses on U91 32 4 Check capacitors and diodes Yes Select Another Test Figure 4 1 Overall Troubleshooting Sheet 6 of 7 28 Troubleshooting Set switches to select one of the keyboard tests Switch setting for Keyboard Tests 080800 Verify that the Kayboard 010100 displays the Agilent 66000 MSB LSB character set across the display 010000 010101 Verify that the Keyboard MSB LSB displays the character
16. U66 to p n 66000 80011 Change 2 Make the following changes in Table 5 2 Change MP4 from a single subchassis p n 5001 9840 to two subchassis parts MP4 p n 66000 00004 and MP5 p n 66000 00006 Change Screw p n 0515 0380 from qty 18 to qty 20 Delete Cover block p n 5040 1697 Change 3 In Table 5 1 and on the schematic delete VR4 p n 1902 0244 In its place add C4 0 1uF 50V p n 0160 4835 Change 4 In Table 5 1 and on the schematic delete U98 1820 6045 and U99 1820 0244 In their place add a single IC assembly U15 p n 1LH4 0001 Change 5 In Table 5 1 and on the schematic change R182 and R187 to 42 2 ohms p n 0757 0316 Add R188 42 2 ohms p n 0757 0316 in parallel with R182 and R187 Manual Backdating 49 2 y EE 31 5 SN E au A 30 E EE 25 VACON MOD ID Ad 25 AES 25 Address Data B s Test Ree eee eee 23 address lines htec ree eR e es MAE pea sha h UP LE 32 DUBITA 32 B Backplane Power up Test pst Ue n eere ee peti nen btt ce ree ts 25 Backplane Senal Port Test echec edite oreet haqa uyta 25 bias voltages ys she A ee eS ee e epe iu 23 30 c uL m M a ME 31 CHECK OUE sess 11 D PILIS RR EE
17. V 3 The keyboard display should now be in meter mode indicating the voltage and status of the dc power module Disable the output prior to connecting a load Press Lo 0 In Case of Trouble If the keyboard and module displays do not read the correct voltage check the operation of the module Refer to the Performance Measurement section of the Keysight Series 66lxxA Power Modules Service Manual Problem Not Identified If after performing the checkout procedures you were unable to isolate the problem refer to the Overall Troubleshooting procedure in Chapter 4 The overall troubleshooting procedure will verify whether the mainframe is at fault and will isolate the problem to a functional block 14 Verification Disassembly This chapter provides disassembly and reassembly instructions for the Keysight 66000A MPS Mainframe Refer to Chapter 6 for an exploded view diagram of the mainframe Major mechanical components are identified with MP designations and are referenced in this section Refer to Chapter 5 for the component descriptions Refer to Chapter 1 for the tools required to disassemble and reassemble the unit Disassembly Procedures SHOCK HAZARD To avoid the possibility of personal injury remove the mainframe from operation before removing the top cover Turn off ac power and disconnect the line cord GPIB cable and load leads before attempting any disassembly When servicing the Main assembly and Backplane as
18. and Table 5 2 lists the mechanical components for the Keysight 66000A MPS Mainframe These tables provide the following information e Reference designation e Keysight Technologies part number e Description of part You can order parts from your local Keysight Technologies sales office A list of the regional sales offices is given at the back of this manual When ordering parts include the following information Keysight Technologies part number Description of the part Quantity desired MPS model number Keysight 66000A The test point and locations diagram in Chapter 6 identifies the location of the electrical components on the Main board The exploded view diagram in Chapter 6 identifies some of the major mechanical components of the mainframe and how they are assembled Parts with MP designations identify components that are referenced in the parts list Replacement Parts 33 Table 5 1 Keysight 66000A MPS Mainframe Parts List Electrical Reference Part Number Description Designators A 66000 61020 ASSEMBLY MAIN BOARD 0160 2025 CAPACITOR FXD 220pF 5 500V C3 0160 4808 CAPACITOR FXD 470pF 5 100V C4 0160 4835 CAPACITOR FXD 0 1uF 10 50V C5 0160 5534 CAPACITOR FXD 0 1uF 10 63V C9 11 0160 4822 CAPACITOR FXD 1000pF 5 100V C12 0160 2025 CAPACITOR FXD 220pF 5 500V C14 0160 4787 CAPACITOR FXD 22pF 5 100V C15 0160 5422 CAPACITOR FXD 0 047uF 20 50V C16 0180 4136 CAPACITOR FXD 10uF 10 20V C17 18 0160 5422 CAPACI
19. are in microfarads unless otherwise specified An asterisk negates a signal name For example WR appears on the schematic as WR Signal line destinations are given inside the parentheses at the end of the signal lines For example RDY S01A5 indicates that the RDY signal continues on schematic sheet 01 at grid coordinates A 5 Coordinates are labeled on the schematic border Signal lines that are terminated by flags continue onto other sheets Note that flags do NOT indicate signal flow direction Signal lines without flags go to another location of the same schematic sheet Test points on the schematic sheets e g TP3 identify the location of the test points used in the troubleshooting procedures in Chapter 4 Voltages and waveforms shown on the schematics are obtained when following the troubleshooting procedures in Chapter 4 Diagrams 41 Main Board Component Coordinates 42 Diagrams O O Es O d C133 54835 TO r m C132 O F8 Es m 2160000000 C1096 Fo J J114 NI TB2 O Oleoon RR A Nel y mme Eu Je dq Booooooo 100000 OOO 5000000000 miau Qul wivielieHnm ojojo o NI INS REN ASUNT gt olx EN x 00 Q7 C163 OWOOOO0 TIN SN IO RO RO sr lt iy gt 04 04 gt 6 OOOOHMOH J200
20. not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Mainframes that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel Printing History The current edition of this guide is indicated below Reprints of this guide containing minor corrections and updates may have the same printing date New editions are identified by a new printing date and in some cases by a new part number A new edition incorporates all new or corrected material since the previous edition Changes to the guide occurring between editions are covered by change sheets shipped with this guide Edition 1 November 1992 Updated June 2000 Updated April 2001 Edition 2 December 2014 Copyright 1992 2000 2014 Keysight Technologies This document contains proprietary information protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without prior consent of Keysight Technologies The information contained in this document is subject to change without notice Table of Contents RE E 7 About This Manual ER 7 Related Documents Oe enter in Revisions and Updates ljEuUtIC
21. panel LEDs and annunciators on the modules briefly turn on 5 The keyboard briefly displays the message Subaddr Instr Frame 8 GPIB Addr 5 Shift Unr Dis Prot Err Cal Rmt Lsn Tk SRQ 6 The keyboard then displays the state of the addressed module MODE Unr Dis Prot Err Cal Rmt Lsn Tik SRQ Note The information displayed on the keyboard assumes e Atleast one power module is installed Factory default state still stored in location 0 Frame mode switch on the back of the mainframe is set to MAIN GPIB address of the mainframe is set to 5 Module configuration switches set to factory default states all OPEN In Case of Trouble Note In case of a module failure the front panel will display an Error Code Uxx Refer to the Keysight Series 661xxA Service Manual for information on troubleshooting the dc power modules A problem exists in the mainframe when one of these conditions is observed during selftest 12 Verification Table 2 1 Problem Symptoms Symptoms Probable Cause Troubleshooting Procedure Keyboard and modules remain turned off Input Line Voltage check fuse F8 Bias Troubleshooting fans not ON Module fans turn ON front displays No bias voltages check fuses F1 amp Bias Troubleshooting remain blank Turned OFF F2 Modules remain OFF keyboard displays Primary Microprocessor U44 ROM amp Microprocessor blinking cursor defective check fuse F1 Troubleshooting Keyboard displays ROM U51
22. selected Disconnect all rear panel connections and reset switches to correct mode and GPIB address END Overall Troubleshooting Figure 4 1 Overall Troubleshooting Sheet 7 of 7 Troubleshooting 29 Start NOTE Bias Troubleshooting 1 Follow the disassembly procedure to gain access to the A1 Main PC Board 2 Connect the power cord to the input terminal as shown in Chapter 2 3 Make sure the power switch is in the ON position Test Point Signal Measurement and Condition With meter or oscilloscope common connected to Test Point 5V 5V 04V 5 5 V 0 4 V Measure the bias and 28 28V 1V reference voltages on the A1 Main PC Board PCLR Goes low for approx 200 ms at power on then goes high Is 1 Check voitage at TP3 presant on Check fuse F1 2 Check VR15 2 2 3 Check signal path for loading Check voltage across C85 is 161 V at 120 Vac or 295 V at 220 Vac Check fuse F8 switch S2 and input circuitry Check voltage across C110 is 20 V Is oltage across C110 Check signal between Correct U1 6 and TP COM Is signal present 1 Check FET circuitry 9 2 Check diode D49 and inductor L2 3 Check capacitors C115 and C123 for short Check U1 and U2 Figure 4 2 Bias Troubleshooting Sheet 1 of 2 30 Troubleshooting is 5 V present on 1 Check fuse F2 TP2 2 Check C16 for short 3 Check voltage w
23. test J5 installed Does keyboard display indicate Check switches S7 PSRQ Pulse Train Test are set correctly HSRQ U15 12 5 Verify Pulse Pattern on HSRQ 20 us div dc coupling ls No Pulse Pattem Check U15 U17 U44 present U58 and U66 Select Another Test Tighten Connect DFI RI Test Connector and instail wires between pin 1 to pin 3 and pin 2 to pin 4 Figure 4 1 Overall Troubleshooting Sheet 4 of 7 26 Troubleshooting Switch setting for DFI Pulse Train Test O NOTE pi 2212 Leave Service Mode jumper Disconnect SASTRT J5 3 de installed 010010 e from GND J5 2 if connected HE MSB LSB and set switches to select test Does eyboard display indicate Check switches S7 DFI RI Pulse Train Test are set correctly DFIB U64 5 LY Verify Pulse Pattern on DFIB RIB 080 8 and RIB 50 us div dc coupling 165 uS period ls No DFIB waveform present Check U44 US8 and U64 Yes ls RiB waveform present E and VR11 CIN Select Another Test 1 Connect a Coax Cable between TrigOut J116 and J117 2 Connect a jumper wire between SACLK J5 8 and U80 5 Switch setting for Trigger In Trigger Out rigger in Disconnect SASTRT J5 3 2 Nae Service Mode jumper atia from GND 45 2 if connected J5 installed 010011 and set switches to select test
24. 1 1 1 125W R130 0698 3609 RESISTOR 22 5 2W R131 133 0757 0394 RESISTOR 51 1 1 125W R146 0757 0442 RESISTOR 10K 1 125W R147 0698 0082 RESISTOR 464 1 125W R149 0757 0428 RESISTOR 1 62K 1 125W R152 154 0683 1015 RESISTOR 100 45 25W R157 0698 3155 RESISTOR 4 64K 41 125W R160 164 0698 8812 RESISTOR 1 1 125W R165 0757 0442 RESISTOR 10K 1 125W R166 167 0698 3155 RESISTOR 4 64K 1 125W R168 169 0811 1848 RESISTOR 5 10 5W R172 0698 8827 RESISTOR 1 125W TF R174 175 0757 0398 RESISTOR 75 1 125W R180 181 0698 3433 RESISTOR 28 7 1 1 25W R182 0686 2705 RESISTOR 27 5 0 5W R184 0698 3155 RESISTOR 4 64K 1 125W R185 0698 0082 RESISTOR 464 1 125W R186 188 NOT USED R187 0686 2705 RESISTOR 27 5 0 5W SCKTI 1200 1274 SOCKET IC CHIP CARRIER 68 CONTACT REF U44 SCKT2 1200 0485 SOCKET IC DIP 14 CONTACT REF 57 SCKT3 1200 0567 SOCKET IC DIP 28 CONTACT REF 051 SCKT4 1200 0639 SOCKET IC DIP 20 CONTACT REF U58 U66 92 3101 2808 SWITCH PB DPST 4A 250Vac 57 3101 2097 SWITCH DIP SL 6 50Vdc TB2 0360 2312 TERMINAL BLOCK 4 TERMINAL 039 IN SQUARE TB5 0360 2421 TERMINAL BLOCK 3 TERMINAL RT ANGLE 5 POSITION Tl 9100 4933 TRANSFORMER FLYBACK FREQ 100KHz 66000 80001 TRANSFORMER BIAS 66000 80002 TRANSFORMER DRIVER 1826 2056 IC V REGULATOR SWG 4 9 5 1 V 8 DIP P 1990 1502 IC OPTO ISOLATOR 36 Replacement Parts Table 5 1 Keysight 66000A MPS Mainframe Parts List Electrical continued Reference Part Num
25. 9 2 4 4J10 5 RXEC0 5411 8 MODID S 8 J10 17 ACON 1 3311 9 TXF 6 219 9 NY TXF 0 10 6 JO 10 J10c 5 TXF CL 241 BCONCG 11 EA Lo 7 ACONCO _ 5411 12 RXE G 539 12 EN BERXFC12 511 13 19 13 MODIDCOO _ 511 14 19 14 gt J11 15 559 15 TINE 5519 6 gt J11 16 ER CC UP TER S 16 IXECZ2 5310 9 RES yi 18 4 ug 19 212 J11 19 MODID 3 559 19 HODIDC22 210 10 8CCSH 3444 20 MODIDC2 20 Jie cis PCLR 110 16 BP 3410 13 A POWER MAIN FRAME BACKPLANE BOARD jo ___ eaoa0 200ai 06 20 91 SHT 1 OF 1 8 Z 6 5 4 2 2 1 N D 2 10 places Manual Backdating This section describes changes that must be made to the manual so that it applies to mainframes with older serial number formats Look in the following table for the serial number of your instrument and make only those changes listed for your instrument Note that for some changes you may be instructed to update the instrument if certain components are being replaced during repair 66000A Serial Number 00101 00835 00836 00945 00946 01255 01256 01560 01561 03295 0535220101 400000306 Changes 1 5 Change 1 In Table 5 1 and on the schematic Delete R174 R175 and VR17 Change U17 to p n 1820 2549 Change U51 to p n 66000 80009 Change
26. C146 0160 4835 CAPACITOR FXD 0 1uF 10 50V C150 0160 4830 CAPACITOR FXD 2200pF 10 100V C151 0160 4822 CAPACITOR FXD 1000pF 5 100V C160 161 0160 4439 CAPACITOR FXD 4700pF 20 34 Replacement Parts Table 5 1 Keysight 66000A MPS Mainframe Parts List Electrical continued Reference Part Number Description Designators 0160 5422 CAPACITOR FXD 0 047uF 20 50V NOT USED 1901 1087 DIODE POWER RECTIFIER 600V 3A 200ns 1901 1087 DIODE POWER RECTIFIER 600V 3A 200ns 1901 1098 DIODE SWITCHING 1N4150 50V 200mA 4 1901 1214 DIODE POWER RECTIFIER 600V 1A 50ns 1901 1128 DIODE SCHOTTKY 40V 1A 1901 1130 DIODE GENERAL PURPOSE 600V 8A 50ns TO 220AC 66000 60003 DIODE WITH HEATSINK ASSEMBLY 1901 1098 DIODE SWITCHING IN4150 50V 200mA 4ns 1901 1098 DIODE SWITCHING 134150 50V 200mA 4 2110 0688 FUSE SUBMINIATURE 3A 125V NTD AX UL CSA 2110 0699 FUSE SUBMINIATURE 5A 125V NTD AX UL CSA 2110 0655 FUSE METRIC 3 15A 250V NTD FE IEC 1252 0268 CONNECTOR RECT MICRORBN 24 CKT 24 CONTACT 1252 4307 CONNECTOR UTIL P amp SKT 4 CKT 4 CONTACT 1251 4926 CONNECTOR POST TYPE 100 PIN SPCG 8 CONTACT 1251 7330 MODULAR PHONE RECEPTACLE RIGHT ANGLE PC MOUNT J116 117 1250 1842 CONNECTOR RF BNC FEM PC W STANDOFFS 50 J119 1252 1014 CONNECTOR RECT SDL 6 CKT 6 CONTACT J120 122 1251 8667 CONNECTOR POST TYPE 100 PIN SPACING 20 CONTACT J126 1251 8675 CONNECTOR POST TYPE 100 PIN SPACING 5 CONTACT J200 NOT USED LI 66000 80004 CHOKE INPUT L2 3 66000 80003 CHOKE OUT
27. CAUTION D 16 Disassembly Use the Pozi driver and remove the line cord from the unit Note the color code and location of each wire on the terminal block before removing the cord Use the T15 driver and remove the four screws two on the front and two on the back that attach the backplane cover 5 to the subchassis MP4 Pull the bottom edge of the cover out slightly so that it clears the alignment pins and lift the cover straight up Grasp the Backplane board A2 firmly and lift it straight out of its plug in sockets Check to make sure that the FLT INH connector is unplugged from the back of the unit Use the 7mm hex driver and remove the two nuts that connect the GPIB connector to the rear panel Use the 10mm hex driver and remove the nut that connects the ground wire to the rear panel Use the T15 driver and remove the three screws that attach the Main board A1 to the subchassis MP4 Carefully lift up the pc board and remove it from the subchassis Reassembly Procedures CAUTION Most of the attaching hardware is metric Use of other types of fasteners will damage threaded inserts Installing the PC Boards 1 Align the connectors on the Main board A1 with the cutouts in the rear panel and carefully install the board in the subchassis MP4 Make sure the Main board is fully inserted in the notches along the edge of the subchassis Use the T15 driver and install the three screws that attach the Main board to the su
28. E PRESENT with Switch in OFF position m NOTE 15412 Leave Service Mode jumper oo Jg installed Check swilches S7 aresetcorrectly ACLK J5 8 8 JS 8 20 us div dc coupling ACON U74 13 gy MODID U71 5 20 us div ov dc coupling ACONWR U74 14 10 us div dc coupling sv ov 1 Check that jumper is installed for Correct slot 2 Check signals SEL 0 2 U74 1 2 3 for correct siot address 3 Check U44 U71 and U74 4 Check for signal loading and shorts 4121 5 to 3121 18 J121 7 to 3121 14 J121 9 to 3121 12 J120 9 to 3120 12 4121 4120 Qae0000000 9 000000000 x 10 20 926969 11 HAZARD AC LINE VOLTAGE PRESENT with Switch in OFF position e 0000090000 Check switches S7 are set correctly Figure 4 1 Overall Troubleshooting Sheet 3 of 7 Troubleshooting 25 TxF U87 13 RxF U72 5 ov JUL JUL TxFEN Verify Pulse Pattern on TxF 087 14 RxF and TxFEN 5V cd ded Eri 100 us div dc coupling FROM c Previous Test Are N 1 Check signals SEL 0 2 U74 1 2 3 Pulse Patterns 9 for correct slot address present 2 Check U44 U58 U72 and U87 2 3 Check for signal loading and shorts Tio Select Another Test Yes Switch setting for PSRQ Pulse Train Test Disconnect SASTRT J5 3 NOTE 010000 Rone Pulse from GND J5 2 if connected 2 Leave Service Mode jumper MSB LSB Train Test and set switches to select
29. Keysight Model 66000A MPS Mainframe Service Guide KEYSIGHT TECHNOLOGIES NOTICE This document contains references to Agilent Technologies Agilent s former Test and Measurement business has become Keysight Technologies For more information go to www keysight com KEYSIGHT TECHNOLOGIES CERTIFICATION Keysight Technologies certifies that this product met its published specifications at time of shipment from the factory Keysight Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Keysight Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Keysight Technologies software and firmware products which are designated by Keysight Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Keysight Technologies will at its option either repair or replace products which prove to be defective Keysight Technologies does not warrant that the operation of the software firmware or har
30. OUND 687 IN LG PIN ESCUTCHEON 095 IN DIA 2 09 IN LG STL FUSEHOLDER TERMINAL BLOCK 4 POSITION SCREW MACHINE M3 X 0 5 6MM LG TB5 TO PC BOARD SCREW MACHINE M4 X 0 7 10MM LG CHASSIS HARDWARE SCREW MACHINE M5 X 0 810MM LG HANDLE HARDW ARE SCREW SPCL M4 X 0 7 7MM LG A3 TO FRONT FRAME ASSEMBLY SAFETY GROUND WIRE NUT HEX DBL CHAM M6 X 1 0 5 7MM THK SAFETY GROUND WASHER LOCK INTL T 1 4 IN 256 IN ID SAFETY GROUND BUMPER FOOT ADHESIVE MOUNTING CLAMP 38 DIA I WD NYLON KEYBOARD CABLE TIE WRAP KEYBOARD CABLE CABLE SERIAL LINK 2 METER LABEL REAR PANEL MANUAL MPS USER S GUIDE MANUAL QUICK REFERENCE GUIDE INSTRUCTION SHEET KEYBOARD INSTALLATION BLOCK TOP COVER Diagrams This chapter contains a test point and component location diagram and schematics for troubleshooting the Keysight 66000A MPS Mainframe An exploded view diagram of the mechanical parts is also provided Test Point and Component Location Diagram The test point and component location diagram identifies the location of the test points that are used in the troubleshooting procedures of Chapter 4 and are also shown on the schematic diagrams The test point and locations diagram also identifies all electrical components on the Main board The diagram is divided into columns and rows designated x coordinates and y coordinates The accompanying table lists all of the components on the Main board and gives the coordinate location of e
31. PUT 06024 80094 CHOKE RFI 66000 60002 TRANSISTOR FET WITH HEATSINK ASSEMBLY NOT USED 0699 3196 RESISTOR 150 5 10W 0698 3155 RESISTOR 4 64K 1 125W 0698 3136 RESISTOR 17 8K 1 125W 0757 0465 RESISTOR 100K 1 125W 0757 0463 RESISTOR 82 5K 1 125W 0757 0273 RESISTOR 3 01K 41 125W 0698 6348 RESISTOR 3K 0 1 125W 0698 3155 RESISTOR 4 64K 1 125W 0757 0394 RESISTOR 51 1 1 125W 0757 0459 RESISTOR 56 2K 1 125W 0757 0407 RESISTOR 200 1 125W 0757 0280 RESISTOR 1 125W 0699 3419 RESISTOR 0699 3420 RESISTOR 0698 3628 RESISTOR 220 5 2W 0698 3155 RESISTOR 4 64 41 125W 0698 8827 RESISTOR 1 125W TF 0698 3155 RESISTOR 4 64K 1 125W 0698 7933 RESISTOR 3 83K 0 1 125W Replacement Parts 35 Table 5 1 Keysight 66000A MPS Mainframe Parts List Electrical continued Reference Part Number Description Designators R89 0698 6348 RESISTOR 3K 0 1 125W R93 0698 3625 RESISTOR 160 45 2W R95 0698 3439 RESISTOR 178 1 125W R98 0698 4037 RESISTOR 46 4 1 125W R99 0698 3155 RESISTOR 4 64K 1 125W R100 0698 4037 RESISTOR 46 4 1 125W R101 0698 3155 RESISTOR 4 64K 41 125W R102 103 0698 4037 RESISTOR 46 4 1 125W R106 1810 0206 NETWORK RESISTOR 8 SIP 10 0K OHM X 7 R107 108 0757 0442 RESISTOR 10K 1 125W R109 0698 0082 RESISTOR 464 1 125W R110 0757 0442 RESISTOR 10K 1 125W R113 0683 1015 RESISTOR 100 45 25W R114 115 1810 0305 NETWORK RESISTOR 9 SIP 4 7K OHM X 8 R121 0757 0394 RESISTOR 5
32. SKT 4 CKT 4 CONTACT 66000 61022 ASSEMBLY KEYBOARD CONNECTOR BOARD 1252 1014 CONNECTOR RECT SDL 6 CKT 6 CONTACT 1251 8608 CONNECTOR POST TYPE 100 PIN SPACING 5 Replacement Parts 37 Ref Qty Des 1 1 1 1 1 1 1 2 1 8 1 2 1 1 4 2 2 2 1 1 1 2 2 2 2 2 1 1 1 2 NARS Part Number 66000 00001 66000 00002 66000 00003 5001 9840 66000 00007 66000 40002 66000 40003 66000 40004 66000 40005 66000 40006 5041 8802 5001 0540 66000 80007 5021 8405 5041 8801 5041 8819 5041 8820 5062 3705 66000 80008 8160 0728 5040 1676 0380 0644 2190 0034 2190 0849 0515 0406 0380 0625 1480 0552 2110 0714 1252 1488 0515 1146 0515 0380 0515 1384 0515 2086 66000 6005 1 0535 0038 2190 0084 0403 0267 1400 1195 1400 0308 5080 2148 66000 80006 66000 90001 66001 90001 66001 90003 5040 1697 38 Replacement Parts Table 5 2 Keysight 66000A MPS Mainframe Parts List Mechanical Description CHASSIS MAIN CHASSIS TRAY BOTTOM CHASSIS TRAY TOP SUBCHASSIS COVER UNIT BEZEL TOP BEZEL BOTTOM BEZEL SIDE PUSHROD ON OFF PANEL FILLER TRIM TOP TRIM SIDE NAMEPLATE FRAME FRONT FOOT CAP STRAP HANDLE FRONT CAP STRAP HANDLE REAR STRAP HANDLE ASSEMBLY KEYBOARD CABLE RFI STRIP AC INPUT SAFETY COVER WITH HARDWARE STANDOFF HEX 255 IN LG 6 32 THD WASHER LOCK HLCL WASHER FLAT MTLC SCREW MACHINE M3 X 0 5 8MM LG TO PC BOARD STANDOFF R
33. TOR FXD 0 047uF 20 50V C20 0180 4405 CAPACITOR FXD 470uF 20 50V C42 0180 4136 CAPACITOR FXD 10uF 10 20V C50 53 0160 5422 CAPACITOR FXD 0 047uF 20 50V C56 0160 5422 CAPACITOR FXD 0 047uF 20 50V C64 0160 5422 CAPACITOR FXD 0 047uF 20 50V C65 0180 4136 CAPACITOR FXD 10uF 10 20V C68 0180 4136 CAPACITOR FXD 10uF 10 20V C85 0180 4396 CAPACITOR FXD 390uF 20 400V C87 0160 5422 CAPACITOR FXD 0 047uF 20 50V C88 0180 4136 CAPACITOR FXD 10uF 10 20V C89 0160 4807 CAPACITOR FXD 33pF 5 100V C90 92 0160 5422 CAPACITOR FXD 0 047uF 20 50V C96 0160 5422 CAPACITOR FXD 0 047uF 20 50V C98 0160 4807 CAPACITOR FXD 33pF 5 100V C100 101 0160 4822 CAPACITOR FXD 1000pF 5 100V C102 103 0160 4807 CAPACITOR FXD 33pF 5 100V C104 0160 4835 CAPACITOR FXD 0 1uF 10 50V C106 0160 5422 CAPACITOR FXD 0 047uF 20 50V C108 0160 4281 CAPACITOR FXD 2200pF 20 250V C110 0180 3805 CAPACITOR FXD 10uF 20 50V C115 0180 4394 CAPACITOR FXD 1000uF 20 40V C116 0160 4831 CAPACITOR FXD 4700pF 10 100V C118 0180 4395 CAPACITOR FXD 470uF 20 50V C123 0180 4405 CAPACITOR FXD 470uF 20 50V C124 0160 4830 CAPACITOR FXD 2200pF 10 100V C125 0160 5469 CAPACITOR FXD luF 10 50V C126 127 0160 5422 CAPACITOR FXD 0 047uF 20 50V C133 0160 7606 CAPACITOR FXD luF 20 250V C135 136 0160 4281 CAPACITOR FXD 2200pF 20 250V C137 0160 7606 CAPACITOR FXD luF 20 250V C138 139 0160 4183 CAPACITOR FXD 1000pF 20 250V C140 143 0160 4822 CAPACITOR FXD 1000pF 5 100V
34. ach component For example resistor R154 is located at x coordinate 12 3 and y coordinate 3 3 Refer to Chapter 5 for the part number and description of each electrical part Main Board Schematics SHOCK HAZARD When servicing the Main assembly and Backplane assembly ac line voltages are present on the Main board and backplane connectors Three foldout sheets comprise the Main board schematic diagrams The circuit functions of each schematic sheet are given as follows Sheet 1 Circuit Functions Among the circuit components included on Sheet 1 are microprocessor U44 GPIB interface chips U15 and U17 ROM chip U51 RAM chip U52 keyboard input J119 and J126 serial link input output J114 and address switch S7 The GPIB interface is the link between the mainframe and the system controller The keyboard input is the link between the mainframe and the Keysight 66001A keyboard All communication between the mainframe and the controller or keyboard is processed by U44 Data communication between the modules and the controller is also directed through U44 Switch S7 determines the address of the mainframe It also indicates if the mainframe is directly connected to the GPIB or linked to another mainframe During troubleshooting switch S7 is used to select diagnostic tests for troubleshooting Pins on test header J5 must be jumpered to perform certain diagnostic tests Sheet 2 Circuit Functions Among the circuits included on Sheet 1 are rectif
35. bchassis Use the 7mm hex driver and install the two flat washers split washers and nuts that fasten the GPIB connector to the rear panel Install the Backplane board A2 into the connectors on the Main board Connect the ground hardware to the chassis in the following order a lock washer b ground wire c lock washer d nut Use the 10mm hex driver and tighten the grounding nut Align the slots in the backplane cover MP5 with the notches on the Backplane board A2 and snap the cover into place Use the slot head screwdriver to align the board in the slots Disassembly 17 9 Make sure that the pins on the bottom of the cover are in their holes and that the cover is flush against the subchassis 10 Use the T15 driver and install the four screws two on the front and two on the back that attach the backplane cover to the subchassis Assembling the Rear Subchassis 1 Slide the rear subchassis MP4 under the sides of the chassis but don t push it all the way in yet leave about two inches of space 2 Connect the keyboard cable MP23 to the connector inside the subchassis 3 Make sure that the on off pushrod MP13 and the chassis pins line up with the openings on the rear subchassis and slide the subchassis into place 4 Use the T15 driver and install the six screws three on each side that attach the rear subchassis to the chassis Don t tighten the screws until all six have been started 5 Push the on of
36. ber Description Designators 1826 1343 IC V REGULATOR V REFERENCE AD J 2 5 36V 8 DIP P 1821 1740 IC GPIB TALKER LISTENER 1821 1479 IC 16 BIT MICROPROCESSOR I O TIMER TIMER A D 1820 2724 IC LATCH TTL ALS TRANSPARENT OCTL U51 66000 80016 IC ROM GPIB PROGRAMMED U52 1818 4134 IC 64K SRAM 35 NS CMOS U58 66000 80010 IC PROGRAMM ABLE LOGIC CMOS EEPLD PROGRAMMED U64 1990 0543 IC OPTO ISOLATOR LED PXSTR IF 150MA MAX U66 66000 80017 IC GAL DECODER PROGRAMMED U68 1826 2341 IC V REGULATOR SWG 8 DIP P U71 72 1820 3176 IC MULTIPLEXER DATA SELECT CMOS HC 8 TO I LINE U74 1820 3206 IC LATCH CMOS HC ADDRESSABLE POS EDGE TRIG U80 1820 3097 IC GATE CMOS HC AND QUAD 2 INPUT U87 1820 3206 IC LATCH CMOS HC ADDRESSABLE POS EDGE TRIG U89 1820 6789 IC INTERFACE TRANSCEIVER U91 1821 4383 IC DUAL UART 68000 COMPATIBLE U97 1820 3176 IC MULTIPLEXER DATA SELECT CMOS HC 8 TO I LINE U98 1820 6045 IC GPIB TRANSCEIVER CHIP U99 1820 6170 IC GPIB TRANSCEIVER CHIP VR4 1902 0244 DIODE ZENER 30V 5 1W VR11 12 1902 0953 DIODE ZENER 6 2V 5 DO 35 PD 4W VR13 1902 0959 DIODE ZENER 11V 5 DO 35 PD 4W VR14 15 1902 0953 DIODE ZENER 6 2V 5 DO 35 PD 4W VR16 NOT USED VR17 1902 0244 DIODE ZENER 30V 5 VR53 1902 0766 DIODE ZENER 18 2V 5 DO 35 PD 4W 0410 2109 CRYSTAL QUARTZ 12 00MHz A2 66000 61021 ASSEMBLY BACKPLANE BOARD 1251 8414 CONNECTOR POST TYPE 100 PIN SPACING 48 CONTACT 1251 8666 CONNECTOR POST TYPE 100 PIN SPACING 20 CONTACT 1252 4306 CONNECTOR UTIL P amp
37. conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury DO NOT EXCEED INPUT RATINGS This mainframe is equipped with a power line filter to reduce electromagnetic interference and must be connected to a properly grounded receptacle to minimize electric shock hazard Operation at line voltages or frequencies in excess of those stated on the line rating label may cause leakage currents in excess of 5 0 mA peak DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the mainframe in the presence of flammable gases or fumes BEFORE APPLYING POWER Verify that the power cord is correctly connected to the mainframe SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the instruction manual refer to Table of Contents Indicates hazardous voltages 5 2 Indicate earth ground terminal Bo The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if CAUTION not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do
38. defective ROM amp Microprocessor Self test Failed ROM Checksum Test Troubleshooting Keyboard displays Primary Microprocessor U44 ROM amp Microprocessor Self test Failed Internal RAM Test defective Troubleshooting Keyboard displays RAM 052 defective ROM amp Microprocessor Self test Failed External RAM Test Troubleshooting Keyboard displays GPIB Controller U17 defective Overall Troubleshooting Self test Failed GPIB Test Keyboard displays DUART U91 defective Overall Troubleshooting Self test Failed Serial Comm Test Keyboard displays Backplane power up or Overall Troubleshooting NO MODULES INSTALLED communication defective Keyboard displays Module defective or backplane Overall Troubleshooting MODULE NOT FUNCTIONING communication defective Refer to Chapter 4 of this manual for detailed troubleshooting procedures Assumes that at least one module has been installed and is connected to the mainframe backplane Verification 13 Output Checkout Make sure that there is no load connected to the output connector by removing the output connector assembly 2 Check the basic voltage functions and module communications as shown in following table Action Keyboard Display Explanation Press 5 X v Y Enter RST Resets the Modular Power System Press CO X 1 Y Enter OUTP ON Enables the output Press X Y X 1 Enter CURR 1 Sets the output current to 1 A Press VOLT 5 Sets the output voltage to 5
39. dware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Keysight Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Keysight Technologies for warranty service Except for products returned to Customer from another country Keysight Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Keysight Technologies product price only if Customer pays Keysight Technologies international prices defined as destination local currency price or U S or Geneva Export price If Keysight Technologies is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Keysight Technologies LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED KEYSIGHT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40. e Figure 1 1 Option 831 P N 8120 5573 Option 833 P N 8120 5568 Option 834 P N 8120 5566 Option 841 P N 8120 5572 Option 843 P N 8120 5571 Option 845 P N 8120 5570 Option 846 P N 8120 5565 Option 847 P N 8120 5567 Option 848 P N 8120 5569 Test Cable BNC male to BNC male P N 8120 1838 Mini Grapper clip leads Wire Size 24 AWG P N 8120 3326 or 8120 3327 DFI RI connector Type Terminal Block 4 pos P N 1252 1488 supplied with mainframe Overview 9 Table 1 1 Service Test Equipment continued Instrument Required Critical Specifications Recommended Model Use MPS Power Module Keysight 661xxA Series DMM Keysight 344014 or equivalent Logic Probe Keysight 545A or equivalent Oscilloscope Bandwidth 100 MHz Keysight 54504A or equivalent MPS Keyboard Keysight 66001A Isolation transformer 1 V Verification T Troubleshooting 2 Use of the keyboard is recommended for displaying selftest error messages C Option 831 833 834 8 Ring Terminals Option 841 Option 843 Option 845 Option 846 Option 847 Option 848 Figure 1 1 Power Cords 10 Overview Verification Operation verification of the Keysight 66000A MPS Mainframe consists of performing the procedure that is located in this section This procedure verifies that the mainframe is performing properly without testing all specified parameters The tests include a preliminary checkout power on selftest and module commun
41. ed to each instrument Item Description US The first two letters indicates the country of manufacture where US USA MY Malaysia SG Singapore 3648 This is a code that identifies either the date of manufacture or the date of a significant design change 0101 The last four digits are a unique number assigned to each mainframe If changes have been made to your unit since the publication of this manual a yellow Manual Change sheet may be supplied with the manual It defines the differences between your unit and the unit described in this manual The yellow change sheet may also contain information for correcting errors in the manual Note that because not all changes to the product require changes to the manual there may be no update information required for your unit Older serial number formats used with these instruments had a two part serial number i e 2701A 00101 This manual also applies to instruments with these older serial number formats Refer to Manual Backdating for backdating information Firmware This manual applies to mainframes that run on software revisions A 00 01 and up The mainframe ROM chip has a label that specifies the firmware revision Safety Considerations The Keysight 66000A MPS Mainframe is a Safety Class instrument that has a protective earth terminal Refer to the Safety Summary page at the beginning of this manual for general safety procedures and the meaning of safety symbols appearing in the manua
42. en removed 1 Insert the slot head screwdriver into the notch at the bottom of each side bezel MP12 to remove the bezels 2 While applying upward pressure with the screwdriver to clear the latch pull the side bezel away from the frame When the latch clears the bottom bezel MP11 the side bezel will come right out 3 Repeatthis procedure for the other side bezel 4 When the side bezels have been removed simply grasp the top MP10 or bottom bezel MP11 at either end and pull the bezels away from the frame The bezels will snap out of the front frame 5 Use the T15 driver to remove the two screws that attach the keyboard plug Removing the Rear Subchassis The cover must be removed from the unit before you can remove the rear subchassis MP4 1 Use the T15 driver and remove the six screws three on each side that attach the rear subchassis MP4 to the chassis 2 Slide the subchassis backward about three inches 3 Carefully unplug the keyboard cable assembly MP23 from the subchassis 4 Grasp the on off pushrod MP13 firmly and unsnap it from the switch located inside the subchassis Pull the pushrod straight back from the subchassis to unsnap it 5 Remove the rear subchassis from the chassis Removing the PC Boards The rear subchassis must be removed from the unit before you can remove the pc boards A1 A2 Observe all standard anti static procedures when removing the pc boards from the subchassis see
43. f pushrod MP13 in from the front panel in until it snaps twice The pushrod must snap twice to indicate that it is firmly connected to the switch inside the subchassis Assembling the Keyboard Plug and Front Bezels 1 Use the T15 driver to install the two screws that attach the keyboard plug in the second and third hole on the bottom right corner of the front frame MP18 when viewed from the front The bottom of the frame is thicker than the top 2 Align the pins on the top and bottom bezels MP10 MP11 with the corresponding holes on the frame and snap the bezels into place 3 Check along the edges of the top and bottom bezels to make sure that they are snapped all the way into place 4 Install the side bezels MP 12 by inserting the top corner of each bezel first then push the bottom corner toward the side of the frame until it snaps into place Assembling the Front Frame Position the front frame MP18 close to the front of the chassis Insert the on off pushrod MP13 into its opening and connect the keyboard cable MP23 to keyboard plug A3 2 Insert the sides of the chassis between the front frame MP18 and the side bezels MP12 Push the front frame onto the chassis as far it will go 3 Use the T15 driver and install the four screws that attach the front frame to the chassis 4 Look through the slots in the bottom tray and check that the keyboard cable MP23 is positioned in the cable clamp If not inse
44. ic circuit on the Main Al board Once a problem has been narrowed down to a specific circuit suggestions are provided as to the components that may be responsible for the problem Refer to the schematic diagrams for detailed information on circuit wiring and component function The overall troubleshooting flowchart Figure 3 1 will identify most of the problems in the mainframe The flowcharts of Figure 3 2 and Figure 3 3 will identify problems in the bias circuits and in the microprocessor circuits To aid in troubleshooting the GPIB address switch S7 can be set to run various test routines as described in the flowchart Placing a jumper on test header J5 is also required to configure and run certain tests You must provide jumper clips for test header J5 Also oscilloscope waveforms are provided on the flowchart along with the settings required to generate the waveforms Connect the A1 board to ac mains through an isolation transformer when making measurements with an oscilloscope The Backplane A2 board contains no active components The schematic diagram provides point to point wiring information of the connectors on the Backplane board 22 Troubleshooting Start NOTE Overall Troubleshooting 1 Turn power OFF 2 Disconnect all rear connections 3 Follow the Disassembly Procedures to gain access to the A1 Main PC Board 4 Connect the power cord to the input terminals as shown in Chapter 2 Select Serv
45. ication Preliminary Checkout Make sure that the front power switch is off 0 2 Lookatthe Line Rating chart on the rear of the mainframe a Verify the modules are set to the appropriate line voltage setting Line selector switches are located on the bottom of the modules Note At least one module is required to verify the operation of the mainframe b Remove the fuse and verify that the fuse is as specified on the label c Install the module s 3 Make sure that the power cord is connected to the terminal block in accordance with the prevailing color code CAUTION Connection of this instrument to an ac power source should be done only by qualified personnel Power Cord Wire Color Codes UL CSA Cords Harmonized Cordage 1 Green or Green with Yellow stripe Green with Yellow stripe Ground 4 Make sure that there is no load connected to the output connector by removing the output connector assembly 5 Verify that the GPIB address switch is set to the desired address 0 31 Verification 11 POWER ON Checkout 1 Connect the instrument to the power source and turn the front power switch to ON 1 2 Listen to confirm the modules fans are on The power supply undergoes a selftest when you turn it on The power on selftest sequence tests the microprocessor GPIB interface and serial communications Selftest Sequence 3 display digits and annunciators on the keyboard briefly turn on 4 All front
46. ice Mode To select service mode connect 1 5512 SAEN J5 1 to GND J5 2 JS joo Turn Power ON Test Point Measurement and Condition Connect meter or oscilloscope common to i Test Point 5V 04V 5V 0 4 V Verify bias voltages at TP1 TP2 and TP4 28V 1 V bias voltages present Connect scope to SACLK 45 8 and COMMON J5 2 Verify Pulse Pattem on SACLK ROMA Microprocessor Troubieshooting keyboard display indicate 1 Check U91 30 and U91 31 for TxKB and RxKB signals to Keyboard Address Data Bus Test 2 Check for clock pulses on U91 32 3 Check keyboard is powered up and functioning Figure 4 1 Overall Troubleshooting Sheet 1 of 7 Troubleshooting 23 Frame Address Mode 4 invoke GPIB Switch Test To start GPIB switch test connect SASTRT J5 3 to GND J5 2 Does keyboard display indicata 4 Check 4 A jumper J5 3 to J5 2 GPIB Switch Tast 2 Check for low U44 31 Time from start pulse 15 us LSB MSB 5V 10 us div Verify Pulse Patter on SACLK dc coupling Stat 010101 Pulse 1 Check GPIB switch S7 set correctly Pulse Pattem present 2 Check for pulses on U97 5 9 10 and 11 3 Check for shorted signals Yes m 010101 MSB Time from start pulse 10 us LSB MSB 5 10 us div Verify Pulse Pattern on SACLK ov dc coupling
47. ier diodes D26 D30 D32 filter capacitor C85 FET switches Q5 and Q6 power transformer bias transformer F2 FET pulse control chip U1 and pulse transformer T3 Isolation between the ac input and the digital circuit is provided by T1 and opto isolator U2 Diagrams 39 Power to the mainframe is provided by a switching power supply Energy is stored in the magnetic field of transformer T1 when current flows in the primary and is transferred to the secondary side when the current flow in the primary is turned off Primary current flow is controlled by FET switches which are turned on and off at an 85KHz rate by U1 Regulation is accomplished by controlling the on time of the FET switches U1 monitors the voltage at the secondary side of T1 through opto isolator U2 and adjusts the on time of the FETs accordingly T2 provides bias power for U1 Power at the secondary side of T1 is rectified and filtered to provide 5V power to the mainframe and 5V and 28V power to the turn on circuits in the modules Sheet 3 Circuit Functions Among the circuit components included on Sheet 1 are multiplexers U71 and U72 demultiplexers U74 and U87 power on chip U68 Trigger In Out BNC connectors J116 and J117 and DFI RI connector TB2 The multiplexers and demultiplexers direct the digital signals from the microprocessor and distribute them among the eight module slot locations via J121 and 1122 5V and 28V bias power is distributed to the module slot l
48. ith keyboard disconnected Is 28 V present on Remove modules from TP4 mainframe Is 28 V present on Yes Use the Module Service Manual TES to Troubleshoot the modules No Check transformer T1 secondary diode D50 and inductor L3 Is PCLR pulse 1 Check U68 and U80 esent on 5 2 Check VR14 3 Check C42 C104 and C146 BPCLR pulse present on U80 11 Check U80 or modules End Bias Troubleshooting Figure 4 2 Bias Troubleshooting Sheet 2 of 2 Troubleshooting 31 Start NOTE ROM amp Microprocessor 1 Follow the disassembly procedure to gain access to the A1 Main PC Board Troubleshooting 2 Connect the power cord to the input terminal as shown in Chapter 2 3 Make sure the power switch is in the ON position Connect logic probe or oscilloscope common to Test Point TPO Verify pulses present on 1 ALE U50 11 2 Address A0 15 and Data Lines DO 7 P AE Gela dnd mes Check clock pulses on Check crystal TP6 TP7 and TP8 with Clock pulses oscillolator Y1 Lines Toggling an oscilloscope present U44 65 and U58 Check RD WR and U66 18 19 select signals Check U50 Are RD WR and select signals present Check U66 Check U51 and U52 END ROM amp Microprocessor Troubleshooting Figure 4 3 ROM amp Microprocessor Troubleshooting 32 Troubleshooting Replacement Parts Table 5 1 lists the electrical components
49. l and on the mainframe 8 Overview Electrostatic Discharge CAUTION neige Ie Failure to observe standard anti static practices can result in serious degradation of performance even when complete failure does not occur When working on the Modular Power System observe all anti static work practices This includes but is not limited to e Working at a static free station such as a table covered with static dissipative laminate or with a conductive table mat Keysight P N 9300 0797 e Using a conductive wrist strap Keysight P N 9300 0969 or 9300 0970 e Grounding all metal equipment at the station to a single common ground e Connecting low impedance test equipment to static sensitive components only when those components have power applied to them e Removing power from the Modular Power System before removing or installing printed circuit boards Service Tools and Equipment The following tools are required to repair the Keysight 66000A MPS Mainframe T15 and T25 TORX drivers 10mm and 7mm HEX NUT drivers 2 POZI driver Slot head screwdrivers small and medium DIP component removal tool Soldering iron and solder De solder removal tool Needle nose pliers Anti static work mat and wrist strap The following equipment is required to troubleshoot the Keysight 66000A MPS Mainframe Table 1 1 Service Test Equipment Instrument Required Critical Specifications Recommended Model Use Power Cords se
50. lar Power System mainframe is at fault 2 Use the flowcharts to locate the mainframe functional block at fault 3 Troubleshoot the functional block per flowchart instructions Troubleshooting tests built into firmware are provided to isolate a problem to one of the circuit boards or to a particular circuit on the board Once a problem has been isolated to a particular circuit suggestions are given as to what component may be at fault This instrument uses components that can be damaged or suffer serious performance degradation as a CAUTION EE result of ESD electrostatic discharge Observe the standard anti static precautions discussed in Chapter 1 to avoid damage to components Accessing the Flowcharts If You Experienced a Selftest Failure If you experienced a selftest failure as described in Chapter 2 Table 2 1 disassemble the pc boards and proceed directly to the flowchart indicated in the Troubleshooting Procedure columns of Table 2 1 e Figure 4 1 Overall Troubleshooting e Figure 4 2 Bias Troubleshooting Figure 4 3 amp Microprocessor Troubleshooting Troubleshooting 21 If You Experienced Other Problems with the Mainframe If you experienced problems other than a selftest failure with the mainframe proceed directly to Figure 4 1 Overall Troubleshooting Troubleshooting Flowcharts The following troubleshooting flowcharts are provided to help you identify and isolate a problem to a specif
51. ocations via 1120 U68 generates a power on power is available signal to the module slot locations via J120 Note J120 connects to J10 on the Backplane board J121 connects to J9 on the Backplane board and J122 connects to J11 on the Backplane board The Trig IN signal from J117 is distributed to the module slot locations via J120 The Trig OUT signal to J116 is directly received from the module slot locations via J120 The RI remote inhibit signal from TB2 is processed by U44 U44 also generates the DFI discreet fault indicator which is connected to TB2 via opto isolator U64 Backplane Board Schematic SHOCK HAZARD When servicing the Main assembly and Backplane assembly ac line voltages are present on the Main board and backplane connectors The Backplane board schematic shows the distribution of the ac power and control signals from the Main board to the eight module connectors There are no active components on the Backplane board Exploded View Diagram The exploded view diagram at the end of this section documents how the major components of the Keysight 66000A MPS Mainframe are assembled Parts with MP designations identify components that are referenced in the parts list Refer to Chapter 5 for the part number and description of the mechanical parts 40 Diagrams Schematic Notes Notes that apply to all schematic sheets are given as follows All resistors are in ohms 1 1 8W unless otherwise specified All capacitors
52. plies Microprocessor RAM and ROM Memory and Serial Interfaces Discrete Fault Indicator Remote Inhibit DFI RI Circuitry Trigger Circuits Power Module Communication Keyboard Accessory Port e Replacement Parts lists part numbers for electrical components and miscellaneous chassis parts e Schematics and component location diagrams are provided as an aid in troubleshooting and repair Overview 7 Related Documents The following documents are related to this manual Keysight 66000A MPS Mainframe Installation 66000 90001 Provides product specifications installation Guide and connection information Keysight Series 661xxA MPS Power Modules 5959 3386 Describes the operation of the MPS Power User s Guide Modules Keysight Series 661xxA MPS Power Modules 5959 3362 Describes SCPI programming commands status Programming Guide reporting Keysight Series 661xxA MPS Power Modules 5959 3364 Provides replaceable parts lists circuit Service Manual diagrams and verification procedures for the Keysight Series 661xxA MPS Power Modules Revisions and Updates Manual Keysight Technologies instruments are identified by a 10 digit serial number The format is described as follows first two letters indicate the country of manufacture The next four digits are a code that identify either the date of manufacture or of a significant design change The last four digits are a sequential number assign
53. rt the slot head screwdriver through the slots in the bottom tray and slide the cable into the cable clamp Don t force the tiewrap under the cable clamp position the tiewrap in front of the cable clamp 18 Disassembly Assembling the Cover 1 Place the top tray MP3 on the chassis with the vents toward the front of the unit 2 Spread the sides of the cover MP6 and slide it onto the chassis so that it fits into the slot behind the front panel assembly Check that the cover is flush against the rear panel 3 Use the T25 driver and install the four screws that attach the handles and the cover to the chassis 4 Reattach the line cord if it has been removed from the unit using the Pozi driver If necessary refer to the Mainframe Installation Guide for more information Disassembly 19 Troubleshooting This chapter provides troubleshooting and repair information for the Keysight 66000A MPS Mainframe Before attempting to troubleshoot the mainframe ensure that the problem is not with an external circuit or application an MPS Power Module the GPIB controller the application program or the input power line SHOCK HAZARD Most of the troubleshooting procedures given in this chapter are performed with power applied and protective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards for example fire and electrical shock Troubleshooting Sequence 1 Verify that the Modu
54. sembly ac line voltages are present on the Main board and backplane connectors CAUTION Most of the attaching hardware is metric Use of other types of fasteners will damage threaded inserts Removing the Modules and Module Connectors Before you can disassemble the mainframe you must first remove all of the power supply modules as well as the module connectors on the back of the mainframe 1 Use the slot head screwdriver and release the pull tab at the front of each module 2 Pullall of the modules out of the mainframe 3 Use the Pozi driver and disconnect all of the module connectors from the back of the mainframe Removing the Cover 1 Use the T25 driver and remove the four screws that attach the handles MP22 to the chassis 2 Slide the cover MP6 back spread the sides slightly and lift the cover up 3 Liftthe top tray MP3 out of the chassis Removing the Front Frame The cover must be removed from the unit before you can remove the front frame Disassembly 15 1 Use the T15 driver and remove the four screws that attach the front frame MP18 to the chassis 2 Slide the front frame forward about two inches 3 Carefully unplug the cable MP23 from the keyboard plug Removing the Front Bezels and Keyboard Plug The front frame must be removed from the chassis before you can remove the bezel pieces MP11 12 Note The keyboard plug A3 can only be removed from the front frame after the bottom bezel MP11 has be

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