HP 6296A Operating And Service Manual Download

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Summary of Contents for 6296A

Page 1: ... DC Power Supply HP Model 6296A Operating and Service Manual ...

Page 2: ... which are designated by HP for me with a hudware product and when property installedon that hardware product are Waftaftted not to fail to execute their programming instruc tiDN due to defects in a aterial and worknwWtip for a period of 90days from date of delivery If HP receives notice of such defects during the wmanty period HP shall ftPair or repi e software meda and firmware which do not exec...

Page 3: ...ept for products returned to Customer from another country HP shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in HP s product price only if Customer pays HP interna tional prices defined as destination local currency price or U S or Geneva Expon price If HP is unable within a reasonable time to repair or replace any product to a c...

Page 4: ...CE AS A CONSTANT VOLTAGE SOURCE Output Impedance specification to read OUTPl1l IMPEDANCE TYPICAL Approximated by a 5 milliohm resistance in series with a 1 microhenry inductance On page 3 2 Figure 3 4 disconnect strap between terminals A4 and A5 and connect A5 to S On page 3 3 Figure 3 6 disconnect strap between terminals A7 and AS and con nect A8 S Add the following note to paragraph 3 18 on page...

Page 5: ...from 1400 0084 to fuseholder body 2110 0564 and fuseh o1der carrier 2110 0565 On page 6 7 Change the HP P N for fuseholder nut from 2950 0038 to 2110 0569 If old fuseholder must be replaced for any reason replace complete fuseholder and nut with new fusebolder parts Do not replace new parts with old parts On page 6 8 note that effective January 1 1971 Options 007 10 turn voltage control and 008 10...

Page 6: ...and 4 must be removed and lugs 2 and 3 connected together In ad dition a new power transformer TSOO must be installed in accordance with Option 18 TIOI 3 CHANGE 4 Make the following changes in the parts list Add new diode CR603 1N485B HP P N 1901 0033 Change R313 to 1 k 5 selected 1 2 W HP P N 0686 1025 Change R707 to 2 W I R C Type BWH HP P N 0811 1674 Change R601 to 422 ohm 1 4 W HP P N 0698 115...

Page 7: ...W HP P N 0686 2205 CHANGE 10 In the parts list delete Cable Clamp HP PIN 1400 0332 qty 2 and add Terminal Strip HP P N 0360 0417 CHANGE 11 The serial prefix of the supply has been changed to 1140A 1his is the only change CHANGE 12 In the replaceable parts list and on the schematic change R702 to 1 5 k ww 3 W HP P N 0811 1805 and change R709 to 1 6 k 5S 1 2 WHP P N 0686 1625 CHANGE 15 TSOO has been...

Page 8: ...adjust pot R711 CHANGE 19 Cont lhe procedure for selecting R712 is identi cal to the one given for 50 Hz operation in paragraph 5 55 steps g through j except that the resistance value should be selected to provide a 3 V 2 V drop across the series regulator For 50 Hz operation the voltage drop across the series regulator remains 3 5 V Center R711 before using the resistance box to determine the val...

Page 9: ...R1 and the anode of CR2 Change CR4 to a two junction stabistor HP PIN 1901 0701 CHANGE 24 In the replaceable parts list on page 64 change R605 to 6 8 k HP PIN 0757 0750 CHANGE 25 In the replaceable parts list page 6 7 add the following mechanical assembly Barrier Strip Guard Assembly HP PIN 5060 2862 qty 1 CHANGE 26 In the replaceable parts list page 6 5 change Q400 to HP P N 1854 1124 QTY 1 and Q...

Page 10: ...der certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT EXCEED INPUT RATINGS Ope...

Page 11: ...Operating Controls and S 25 Troubleshooting S 6 Indicators 3 1 5 27 Trouble Analysis S 7 3 3 Operating Modes 3 1 S 34 Repair and Replacement S 7 3 S Normal Operating Mode 3 1 S 36 Adjustment and Calibration S 13 3 7 Constant Voltage 3 1 S 38 Meter Zero S 13 3 9 Constant Current 3 1 S 40 Voltmeter Tracking S 13 3 11 Connecting Load 3 2 S 42 Ammeter Tracking S 13 3 14 Operation of Supply Beyond S 44...

Page 12: ...y means of an external voltage source or resistance b Remote Sensing The degradation in regulation which would occur at the load because of the voltage drop in the load leads can be reduced by using the power supply in the remote sensing mode of oper ation 1 1 c Series and Auto Series Operation Power supplies may be used in series when a higher output voltage is required in the voltage mode of ope...

Page 13: ...to list at rear of manual for ad 1 2 c lresses i Part No 14SlSA 1452SA Description Rack Kit for mounting one Si high supply Refer to Section II for details Rack Kit for mounting two Si high supplies Refer to Section II for details 1 12 INSTRUMENT IDENTIFICATION 1 13 Hewlett Packard power supplies are identi fied by a three part serial number tag The first part is the power supply model number The ...

Page 14: ...stant current cir cuit protects the power supply for all overloads 1 3 including a direct short placed across the termi nals in constant voltage operation The constant voltage circuit limits the output voltage in the constant current mode of operation METER The front panel meter can be used as either a 0 70 or 0 7 volt voltmeter or as a 0 4 or 0 0 4 amp ammeter OUTPUT CONTROLS Coarse and fine volt...

Page 15: ...trument is shipped ready for bench operation It is necessary only to connect the in strument to a source of power and it is ready for operation 2 9 LOCATION 2 10 This instrument is air cooled Sufficient space should be allotted so that a free flow of cooling air can reacn the sides anci rear of the ins trumenc when itis inoperation It should be used in an area where the ambient temperature does no...

Page 16: ...e normal soocentigrade capability with a 60 Hz input To permit optimum operation at 50 Hz the unit must 2 2 be realigned This realignment procedure is de scribed in Paragraph 5 54 at the rear of the manual 2 19 POWER CABLE 2 20 To protect operating gersonnel the National Electrical Manufacturers Association NEMA recommends that the instrument panel and ca binet be grounded This in trument is equiP...

Page 17: ... ational features of this supply is contained in a power supply Application Manual and in various Tech Letters published by the Harrison Division Copies of these can be obtained from your local Hewlett Packard field office 3 1 3 5 NORMAL OPERATING MODE 3 6 The power supply is normally shipped with its rear terminal strapping connections arranged for Constant Voltage Constant Current local sensing ...

Page 18: ...ge or current that is available in excess of the normal output Althouoh the supply can be operated in this shaded region without being damaged it can not be guaranteed to meet all of its performance specifications Hawever if the line voltage is maintained above 115 Vac the supply wil proba bly operate within its specifications 3 2 3 16 OPTIONAL OPERATING MODES 3 17 REMOTE PROGRAMMING CONSTANT VOl ...

Page 19: ...et discrete values of output cur rent A make before break type of switch should be used since the output current will exceed the maximum rating of the power supply if the switch contacts open during the switching interval CAUTION If the programming terminals Al and A7 should open at any time durinq this mode the output cur rent will rise to a value that may damage the power supply and or the load ...

Page 20: ...eries Connections Figure 3 8 Two or more power supplies can be operated in series to obtain a higher voltage than that avail able from a single supply When this connection 3 4 r Al l r r A6 117 U c 0 Figure 3 8 Normal Series Connectii ns is used the output voltage is the sum of the voltaqes of the individual supplies Each of the individual supplies must be adjusted in oz der to obtain the total ou...

Page 21: ...until it equals that of the other supply The constant voltage source will deliver only that fraction of its total rated output current which is necessary to fulfill the total current demand Figure 3 10 Normal Parallel Connections 3 41 Auto Parallel The strapping patterns for Auto parallel operation of two power supplies are shown in Figure 3 11 Auto Parallel operation permits equal current sharing...

Page 22: ... the pulse current capability but will decrease the safety provided by the con stant current circuit A high current pulse may damage load components before the average output 3 6 current is large enough to cause the constant cur rent circuit to operate 3 50 The effects of the output capacitor during constant current operation are as follows a The output impedance of the power supply decreases with...

Page 23: ...s and two SCR s The bridge simultaneously performs the necessary rectifying and preregu at ing functions The SCR s oper ting in conjunc tion with a control circuit minimize the power dissipated by the series regulator by keeping the yoltage drop across the regulator at a low and constant level The SCR control circuit accom 4 1 plishes this by issuing a firing pulse to one of the SCR s once during ...

Page 24: ... UfPUT rl 0102 CllCUlT QIDI 2 u r 7 NOTIS CllCUJT 0150 tlllt MftP 1 VOLTAGE ACROSS CIOO rel ACK MODEL IS SllOWJI IUDW1 Ol5J S2 MODEL NO 212A USA 2t 62IOA 211A 1216A YOL1S CDC 16 2 11 2 16 2 u 2 11 2 21 2 l l OSITM lllAS VOLTAGE FOR UCH MODEL l SHOWJll IELOW MQPQ NO 6282 285 216A 129DA 291A 1216A YOL1S DC lSV I 7V UV 2DV 17V ZDY 3 VOLTAGE ACROSS INPUT FILD a CAPACITOR FOR PCB MOmL IS SHOWN IELOW MQ...

Page 25: ...ut termi nals of the power supply is a protective device which prevents internal damage that might occur if a reverse voltage were applied across the output terminals Output capacitor C809 stabilizes the feedback loop when the normal strapping pattern shown in Figure 4 2 is employed Note that this capacitor can be removed if an increas in the programming speed is desired Under these con ditions ca...

Page 26: ...0 become forward biased The negative voltage then is coupled to the base of transistor Q701 Transistors Q701 and Q700 form a squaring circuit resembling a Schmitt trigger configuration Q701 is conducting prior to firing time due to the positive bias connected to its base through R705 Transistor Q700 is cut off at this time be cause its base is connected directly to the collec tor of conducting tra...

Page 27: ...ear Of manual 10 6 ZV ll07 CIUOZ TING __ _ __ __ _ _ CIRcurT U 4 ll03 RlO RlOI 6 V R105 6 ZV serves as the series or pass element which provides precise and rapid control of the output The conduction of the series translstor s ls con trolled by the feedback signals obtained from driver Q303 Diode CR400 connecteii across the regulator circuit protects the series element s from reverse voltages that...

Page 28: ...cessive voltage excursions from over driVing stage QlOOB Capacitor C801 shunting i 2V O GATING ClllCUIT L2V the programming resistors increase the high frequency gain of the input amplifier Resistor R806 shunting the pullout resistor serve1s as a trimming adjustment for the programming current Diode CR102 establishes the proper collector bia for QlOOA while R103 and ClOO proVide low fre quency equ...

Page 29: ... off in the loop gain response in order to stabilize the feedback loop 4 7 4 36 Capacitor C900 diode CR901 and resistor R902 form a long time constant network which achieves a slow tum on characteristic When the unit is first turned on C900 provides a positive voltage to the base of Q302 keeping the series regulator from conducting initially As C900 charges up the restrictive bias becomes less pos...

Page 30: ... RB62 RB61 R8 1 S2 FOSmoNS FOR I IFFERENT MOI EU ARE SHOW BELOW MODEL S2 TERl TN NOS I 2 3 4 628ZA l 2V 12V HA l ZA 628 2 4V 24V 6A 6A 6286A 2 4V Z4V IZA l ZA 629 A v ov 4A 4A 6291 sv sov 6A 6A 6Z96A 7V 70V 4A u RB O tected by Q602 and Q603 The error voltage is amplified and inverted by Q601 and appli ed to series requlator Q600 in the correct phase and amplitude to maintain the 15 4 volt output c...

Page 31: ...age of the output voltage drop across RSS l and RBS 2 to stage Q851A With 52 in the higher current posi tion 3 the voltaqe drop across R853 is applied 4 9 to stage Q851B while stage Q851A is grounded to the S terminal In the low current range the voltage drop across R853 and R854 is applied to Q851B 4 49 Differential amplifier stage Q851 is a stable device having a fixed gain of ten To minimize te...

Page 32: ... ure 3 2 or as shown in Figure S 1 The performance characteris tics should never be measured on the front terminals if the load is connected across the rear terminals Note that when measurements are made at the front terminals the monitoring leads are connected at A not B as shown in Figure S 1 Failure to connect the measuring device atA willresuitin a measure ment that includes the rest stance of...

Page 33: ...40 A plus Differential input waveforms 1400A plug in Oscillator Range SHz to l MHz Impedance checks e 200 CD Accuracy 2 DC Voltmeter Accuracy 1 Input Measure DC voltages 412A resistance 20 000 ohms volt mtn l Repetitive Rate 60 400 Hz 21 5eC Measure transient response See Figure 5 7 Load Switch rise and fall time Resistive Value See Paragraph 5 14 Power supply load resistors Loads and Figure 5 4 1...

Page 34: ...factory null detectors are S 419 A null detector a DC coupled oscilloscope utilizing differential input or a SO mv meter move ment with a 100 division scale For the latter a 2 mv change in voltage will result in a meter deflec tion of four divisions CAUTION Care must be exercised when using an electronic null detector in which one input terminal is grounded to avoid ground loops and circulating cu...

Page 35: ...Set METER switch to highest current range and turn on supply S 4 POWER SUPPLY UNDER ST MODEL NO I R 6281A 0 20 6282A 0 JO 6284A 0 l3 6285A 0 20 6286A 0 10 6289A 0 66 6290A 0 33 6291A 0 20 6294A I 0 6296A 0 33 6299A I 33 OtrrtRENTIAL VOLTMETER R I 30 0 90 6 3 80 I 90 zi 13 7 80 59 19 66 131 Figure S 5 Load Regulation Constant Voltc 1ge d Adjust VOLTAGE controls until front panel meter indicates exa...

Page 36: ...just VOLTAGE ontrols until front panel meter indicates exactly the maximum rated output current or S amperes whichever is smaller e Close line switch on repetitive load switch setup 5 5 POWtR SUPPLY UNDER TEST OSCILLOSCOPE 140A 0 0 1 0 G 0 CONTACT PROTECTION Ntl WORIC Ry l ld I SW 200V NOTE 31 Rx f Vlll l V 1 ODEL NO RESIS A u Rx a 6282A 0 10 0 90 628SA 0 20 3 80 6286A 0 10 1 90 6290A 0 33 13 0 62...

Page 37: ... 5 23 Line Regulation To check the line regula tion proceed as follows a Utilize test setup shown in Fiqure 5 4 leaving switch Sl open throughout test b Connect variable auto transformer b1 tween input power source and power supply power input c Adjust auto transformer for lOSVAC input d Turn VOLTAGE controls fully clockwise e Set METER switch to highest current range and tum on supply f Adjust CU...

Page 38: ...iagram Addi tional test procedures that will aid in isolating troubles are as follows a Reference circuit check Paragraph 5 31 This circuit provides critical operating voltages fa the supply and faults in the circuit could affect the overall operation in many ways This circuit should be checked first before proceeding to other areas of the unit b Series regulator and preregulator feedback loop che...

Page 39: ...rted Table 5 4 Low Output Voltage Troubleshooting Step Measure Response I Probable Cause 1 Voltage between TP26 and TP90 a More positive than a Proceed to Step 2 ov b OV or negative b Proceed to Step 3 2 Voltage between TP90 and TP27 a Less positive than a Cheele fuse Fl If blow111 4V check CRS02 or CRS04 for short If not blown pro ceed to Table s s b More positive than b 0400 0401 open sv Proceed...

Page 40: ...n ing pulse CRSOO shorted Proceed to Step 2 2 Waveform between 90 and 47 a Zero or small posi a Q7 00 shorted tive voltage C703 shorted Q701 open R703 primary T700 open Proceed to Step 3 b 16 to 20 Volt level b Q700 open R703 shorted Q70l shoned Proceed to Step 3 c Waveform distorted c Proceed to Step 3 3 Waveform between 90 and 59 a Amplitude incorrect a Q702 defective R707 R708 R713 incor rect v...

Page 41: ...sure that supply is not crossing over to constant voltage opera tion Check constant voltage input circuit Oscillates Constant Check C301 for open adjustment of R307 Paragraph 5 50 Voltage I Constant a Current b Check Rl03 ClOO or R304 C300 a Check reference voltages Paragraph 5 31 Poor Stability b Noisy programming resistors R813 R814 c CR100 CRlOl leaky Constant Voltage d Check Rl04 R805 R806 CS0...

Page 42: ...ting amplifier CC load regulation Q301 Constant Voltage gating amplifier CV load regulation 0302 0303 Error amplifiers CV CC load regulation Transient response R307 0400 0401 Series Regulator CV CC load regulation 0600 Q601 Reference regulator Reference oltages 0602 Q603 Overvoltage trip point R604 0700 Q701 Voltage across R711 0702 SCR control series regulator 0851 0852 Meter zero Voltmeter R870 ...

Page 43: ... board will result 1 Apply heat sparingly to lead of component to be replaced If lead of componentpasses through an eyelet in the circuit board apply heat on com ponent side __ of board If I lead of com ponent does not pass uirough an eyelet apply beat to conductor side of board 3 Bend clean tinned lead on new part and carefully insert through eyelets or holes in board C Up Q Q 2 Reheat solder inv...

Page 44: ...y below meter face c Rotate plastic disc clockwise cw until meter reads zero then rotate ccw slightly in order to free adjustment screw from meter suspension If pointer moves repeat steps band c 5 40 VOLTMETER TRACKING S 41 l o calibrate voltmeter tracking p oceed as follows S 13 Paragraph Control Device 5 38 Pointer 5 40 R870 and R865 5 42 R855 S 44 R806 5 46 R808 5 48 R604 s so R307 5 52 R7ll a ...

Page 45: ...ust be kept within i 0 5Vdc when ad justing the decade resistance box 5 14 f Replace decade resistance With r esistor of appropriate value in R604 position 5 50 TRANSIENT RECOVERY TIME S 51 To adjust the transient response proceed a follows a Connect test setup as shown in Figure 5 7 b Repeat steps a through e as outlined in Paragraph 5 19 c Adjust R307 so that the transient response is as shown i...

Page 46: ...rument Hewlett Packard part number circuit reference des ignator and description To order a part not listed in Table 6 4 give a complete description of the part its function and its location Table 6 l Reference Designators A assembly E miscellaneous B blower fan electronic part c capacitor F fuse CB circuit breaker J Jack Jumper CR diode K relay DS device signal L inductor ing lamp M meter 6 l Tab...

Page 47: ...137 Transistor Electronics Corp Minneapolis Minn CODE NO 07138 07263 07387 07397 07716 07910 07933 08484 08530 08717 08730 08806 08863 08919 09021 09182 09213 09214 09353 09922 11115 11236 11237 11502 11711 12136 MANUFACTURER ADDRESS Westinghouse Electric Corp Electronic Tube Div Elmira Y Fairchild Camera and Instrument Corp Semiconductor Div Mountain View Calif Birtcher Corp The Los Angeles Calif...

Page 48: ...FMC Corp Thomas and Betts Co Union Carbide Corp Ward Leonard Electric Co Homer City Pa Philadelphia Pa New York N Y Mt Vernon N Y Use Code 71785 assigned to Cinch Mfg Co Chicago Ill 6 3 CODE NO MANUFACTURER ADDRESS 70563 70901 70903 71218 71279 71400 71450 71468 Amperite Co Inc Union City N J Beemer Engrq Co Fort Washington Pa Belden Corp Chicago Ill Bud Radio Inc Wllloughby Ohio Cambridge Thermio...

Page 49: ...ngfield N J Bendix Corp Electric Power Div Eatontown N J Herman H Smith Inc Brooklyn N Y Central Screw Co Chicago Ill Gavitt Wire and Cable Div of Amerace Esna Corp Brookfield Mass 6 4 CODE NO 83508 83594 83835 83877 84171 84411 86684 86838 87034 87216 87585 87929 88140 88245 90634 90763 91345 91418 91506 91637 91662 91929 92825 93332 93410 94144 94l54 94222 95263 95354 95712 95987 96791 97464 977...

Page 50: ... 200prv 24 HI AB 09182 1901 0033 9 CR400 501 503 809 Si rect 3A 7soc 200prv 4 MR1032B Motorola 04713 1901 0416 4 CR401 403 404 600 601 800 801 902 Si rect 500ma 200prv 8 1N3253 R C A 02735 1901 0389 6 CR402 602 803 804 805 806 Si diode 200ma 15prv 6 HI AB 09182 1901 0461 6 CR502 504 SCR 8 amp 200prv 2 2N3669 R C A 02735 1884 0019 2 Fl Fuse cartridge SA 1 312005 Littlefuse 75915 2110 0010 5 Ql00 20...

Page 51: ... bed WW 390 n 1 5 3w 1 242E 3915 Sprague 56289 0811 1799 l R700 fxd met ox 270 n t 5 2w 1 Type C42S Coming 16299 0698 3629 1 R701 fxd comp 24n 1 5 jw l EB 2405 A B 01121 0686 2405 1 R702 fxd WW 2 4K n 1 5 3w 1 242 2425 Sprague 56289 0811 1807 1 R703 707 fxd comp 3 9Kn t 5 w 2 EB 3925 A B 01121 0686 3925 1 R704 fxd comp 9 lKn 1 5 tw l EB 9125 A B 01121 0686 9125 l R705 fxd comp llOKn 1 5 iw l EB 11...

Page 52: ...Lt red ON OFF l 54 61681 26AlH Oak 87034 3101 0100 1 52 Switch Rotary meter 3 pole 4 position 1 HIAB 09182 3100 1910 l T700 Pulse Transformer 1 HIAB 09182 9100 1824 1 T800 Power Transformer llSV 1 HIAB 09182 9100 1846 l T800 Power Transformer 230V Special for 230V opera tion only HIAB 09182 9100 2141 T801 Bias Transformer l HLAB 09182 9100 1832 1 VR300 Diode zener 4 22V i 5 400MW l HLAB 09182 1902...

Page 53: ... l 2 4 l 2 9 2 1 6 2 4 8 9 1 1 1 1 1 1 1 1 1 1 1 1 KH 4096 SR SP 1 734 4586 2A 6 32 T4 6 T4 4 CIA 832 2 CIA 632 2 422 13 11013 7835 Series 8400 Series 8400 Includes Series 8400 Series 8400 Includes Series 8400 RD 411 Includes Series 8400 RD 411 6296A 6 8 Mfr Mfr Code Stock N o RS HI AB 09182 0370 0101 1 HIAB 09182 0370 0179 i HI AB 09182 0360 1 34 Beldon 70903 8120 0 50 l Heyco 28520 0400 0013 l R...

Page 54: ...ORMS TAKEN WITH llSVAC 60Kz SDIGLE P INPUT AT MAXIMUM RATED Ot1TPl1T VOLTAGE AND NO LOAD CONNECTED AMPLITUDES ARE TYPICAL IOS Z OSCIUOSCOPE DC COVPtED AND RUtRl NCED TOT P 90 UNUSS OTHERWISE INDICATl D 3 WAVEFalMS ARE NOT DRAWN TO SCAIL 4 AMPLITUDE or WAVEFORM AT T 47 VARIES WITH DlrrtRENT MODELS AS FOLLOWS MODEL NO 6282 l VOLTAGE ISV 6285 l 17V 6216 62901 6Z91A 6296 ISV ZOV 17V zov ...

Page 55: ... V01 DGl S U E TYPICAL lO J UNLESS OTHZllWISZ INDICATED A1L UllJINGS t lUN WITH SUPPLY 1N CONSTANT VOLUGE OPDATION A f WAXJMUM RA TED OUTPUT WITH NO LOAD CONNtC ftD CUUENt COJC1ROl I SHOUl D BE TUaNZJJ ruLl Y a oa ww fll H i i c Vaw 11 t 17 CJ 401 r C t40 R8l 3 3K CR801 C fS I METERING GATING 2 i LL Ef IST Of A Ee 1 zW 5 7o UNLE S NOTED oTHEIZ w1o i E 3 1 OENOTES 2 0 PPM WI T eMp t C OE S 4 e A T ...

Page 56: ...CEPT OT IEew ioTED Ii 3 ON M00EL5 r Z82A C Z85A G Z8r A AND r zq1A CR400 CR501 CR503 AND CRSoq MOUNTED ON HEAT 51NK5 OT PRINTED CIRCUIT BOARD 4 ON MODELS r zqoA AND C Z C A CR400 CR501 CR 3 CR80 7 ARE MOUNTED ON PRINTED CIRWIT SOARD NOT HEAT 51NK5 5 ON MODEL5 Z85A lo2qol lozq1A AND c 2q A R401 AND Q401 ARE NOT U5ED ANO R400 15 l E Pt A5ED WITH A JUMPER ...

Page 57: ...O 1 5 r 19 iu 0 0 i I I tO Ir II I A 1 3 1 11 rr I 0I CR504 IJ I ___ 0 t rr 3 ON M00 LS G 282A C tSSA c ze A AND c rq1A CR OO CR SOl CR K ANO CR801 MOUNTED ON HEAT 51NK 5 NOT PRINTED CIRCUll BOARD ON MODELS iotqoA ANO iozqi A CR OO CR I CR B CR 809 ARE MOUNTED ON PRINTED CIRCUIT BOARD NOT HEAT 51NK5 5 o MODEL ioze5 1aqoA r zq1A AND IOZ lroA R IOI AND Q IOI ARE NOT U 5ED AND R 400 1 5 F1EPl A5 0 WI...

Page 58: ...S 42V 6 66V To prevent transients from falsely tripping the crowbar the trip voltage must be set higher than the power supply output voltage by the following margin 7 of the output voltage lV The margin represents the minimum crowbar trip setting for a given output voltage the trip voltage can always be set higher than this margin OPERATION 1 Tum the CROWBAR ADJUST fully clockwise to set the trip ...

Page 59: ...embly Includes Components Printed Circuit Board Bracket Modified Front Panel Includes Components TO 1 4 1 1 1 1 1 1 1 1 l 1 1 l 1 1 1 1 1 l l 1 1 1 1 1 6296A A 2 MFR PART NO 192Pl0492 1N485B 1Nl200A 2N3669 2N2714 2N3417 TZ173 EB 7515 EB 2045 EB 1035 EB 3925 EB 47G5 C425 Type C42S Type CEA T 0 242 3325 EB 2045 1N3512 MFR HP CODE PART NO RS 56289 0160 0168 1 09182 1901 0033 4 02735 1901 0002 1 02735...

Page 60: ..._________ NOTES I ALL RESISTORS ARE 1111 OHMS 112 W UNLESS OTHERWISE NOTED Z ALL CAPACITORS ARE IN ltlCROl ARADS UNLESS OTHERWISE NOTED CIRCUIT PATENTS APPLIED FOR LICElllSE TO USE MUST BE 08TAINEO IN WRITllllG FllOll EWLETT PACURD CO ttARR 150111 DIVISION Rl2 0 U J 5W CR6 CR7 Figure A 1 Model 6296A Over Voltage Protection Crowbar A 3 ...

Page 61: ...Order Part Number 06296 9000I E l 2M1 l I090 Primed in CSA F HEWLETT f a PACKARD Manufacturing Part umber 06296 90001 1111111111111111111111111111111111111111111111111111111111111 llll ...

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