HP 6443B Operating And Service Manual Download Page 48 | Manualshive

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Summary of Contents for 6443B

Page 1: ...DC POWER SUPPLY SCR lP SERIES MODEL 6443B SERIAL NUMBER PREFIX 6G OPERATING AND SERVICE MANUAL HEWLETT PACKARD HARRISON DIVISION ...

Page 2: ...DC POWER SUPPLY SCR lP SERIES MODEL 6443B SERIAL NUMBER PREFIX 6G June 1966 Stock No 06443 90001 ...

Page 3: ...HP Archive This vintage Hewlett Packard document was preserved and distributed by www hparchive com Please visit us on the web Prepared by on line curator Tony Gerbic For FREE Distribution Only ...

Page 4: ...er Requirements 2 15 Power Cable 2 18 Repackaging for Shipment OPERATING INSTRUCTIONS 3 1 Controls and Indicators 3 3 Operation 3 4 General 3 6 Normal 3 10 Connecting Load 3 14 Remote Sensing 3 17 Remote Programming 3 26 Parallel 3 30 Series 3 35 Auto Tracking 3 38 Operating Considerations 3 39 Pulse Loading 3 41 Output Capacitance 3 44 Negative Voltage Loading 3 46 Negative Current Loading i Page...

Page 5: ...Accuracy 5 2 5 13 Line Regulation 5 3 5 4 5 16 Load Regulation 5 19 Ripple and Noise 5 21 Transient Recovery Time 5 23 Additional Specification Check 5 24 Temperature Coefficient 5 2 7 Output Stability 5 4 5 5 5 6 5 6 5 6 5 30 Remote Programming 5 7 5 33 Output Impedance 5 35 Output Inductance 5 3 7 Cover Removal 5 39 Troubleshooting 5 40 General 5 42 Trouble Analysis 5 49 Repair and Replacement 5...

Page 6: ...TABLE OF CONTENTS cont Title Zero Current Output Bias and Reference Line Regulation Line Imbalance Constant Current Load Regulation REPLACEABLE PARTS 6 1 Introduction 6 4 Ordering Information iii Page 5 16 5 16 5 17 5 18 6 1 6 1 6 1 ...

Page 7: ... ...

Page 8: ...e Constant Current Less than 25 ma for 105 I25 vac input change Constant Voltage Less than 120 mv for 0 to 2 5 ampere load change Constant Current Less than 25 ma for 0 to 120 vdc load change 240 mvrms Constant Voltage 0 05 plus 30 mv per degree centigrade Constant Current 8 ma per degree centigrade Constant Voltage O I5 plus 90 mv for 8 hours at constant temperature Constant Current 25 ma for 8 h...

Page 9: ...e power supply Nominal output voltage is defined as the mean between the no load and full load voltages The transient amplitude is less than 4 0 volt per ampere for any load change between 20 and 100 of rated output current Excluding the initial spike of approximately 100 microseconds dura tion which is significant only for load rise times faster than 0 2 ampere per micro second Heioht Width 3 1 2...

Page 10: ...tching the power supply into constant voltage operation The user can adjust the crossover point via the front panel controls para 3 8 and 3 9 1 6 The power supply is protected from reverse voltage positive voltage applied to negative terminal by a diode that shunts current across the output terminals when this condition exists The ac input is fused A double pole on off switch opens both power lead...

Page 11: ...4 Harrison Laboratories power supplies are identified by a three part designa tion The first part is the model number the second part is the serial number and the third part is the manufacturing code letter This manual applies to all Model 6443A power supplies with the same manufacturing code letter given in the title page Change sheets will be supplied with the manual to make it apply to Model 64...

Page 12: ...ectors that the external sur face is not scratched or dented that the meter faces are not damaged and that all controls move freely Any external damage may be an indication of internal damage 2 6 ELECTRICAL CHECK 2 7 Check that the straps on the terminal strip at the rear of the power supply are secure and that the strapping pattern is in accord with figure 3 2 Check the electrical performance of ...

Page 13: ...e offset pin on the power cable three prong connector is the ground connection 2 17 To preserve the protection feature when operating the instrument from a two contact outlet use a three prong to two prong adaptor and connect the green lead on the adaptor to ground 2 18 REPACKAGING FOR SHIPMENT 2 19 To insure safe shipment of the instrument it is recommend ed that the pack age designed for the ins...

Page 14: ...FINE VOLTAGE CONTROLS UNTIL Tl E LTAGE ON THE OUTPUT VCX TAGE METER IS OF DESIRED VALUE 3 SHORT CIRCUIT THE OUTPUT TERMINALS AT REAR OF POWER SUPPLY r cURRENT COARSE FINE 0 0 0 GNO 4 ADJUST COARSE AND FINE CURRENT CONTROLS UNTIL THE CURREN T ON THE OUTPUT CURRENT ME TER IS OF DESIRED ALUE 5 REMOVE SHORT AND CONNECT LOAD OPERATING PROCEDURE FIG 3 1 0 0 ...

Page 15: ......

Page 16: ... mode of operation This strapping pattern is illustrated in figure 3 2 The operator selects either a constant voltage or a constant current output using the front panel controls local programming no strap ping changes are nece ssary 3 8 CONSTANT VOLTAGE To select a constant voltage output proceed as follows a Turn on power supply and adjust VOLTAGE controls for desired output voltage output termin...

Page 17: ...will retain full advantage of the low output impedance of the power supply Each pair of c onnecting wires should be as short as possible and twisted or shielded to reduce noise pickup If shield is used connect one end to power supply ground terminal and leave the other end unconnected 3 13 If load considerations require that the output power distribution terminals be remotely located from the powe...

Page 18: ...impedance a capacitor with a mini mum rating of 4 000µ fd and 150 vdcw should be connected across the load using short leads This capacitor must have high frequency characteristics as good or better than C 17 has see parts list c Tum on power supply 3 17 REMOTE PROGRAMMING 3 18 GENERAL The constant voltage and constant current outputs may be pro grammed controlled from a remote location The front ...

Page 19: ...This tolerance can be improved by chang ing R6 For further information on improving this tolerance refer to paragraph 5 63 and to H Lab l ech Letter 1 3 21 If the resistance programming device is controlled by a switch make before break contacts should be used in order to avoid momentary opening of the program ming terminals To connect the remote programming resistance arrange rear terminal strapp...

Page 20: ...ster should be set to the desired output voltage the other power supply slave should be set for a slightly larger output voltage The master will act as a constant voltage source the slave will act as a constant current source dropping its output voltage to equal the master s 3 2 9 AUTO PARALLEL The strapping patterns for auto parallel operation of two and three power supplies are shown in figures ...

Page 21: ...ity specifica tions of the power supply the external res istors shown in figures 3 1OA and B should be stable low noise low temperature less than 30 ppm per 0 c resistors The value of these resistors is determined by multiplying the output voltage of the applicable slave by the programming coefficient 300 ohms volt 3 35 AUTO TRACKING 3 36 The strapping patterns for auto tracking operation of two a...

Page 22: ...ause the constant current circuit to operate 3 43 The effects of the output capacitors during constant current operation are as follows a The output impedance of the power supply decreases with increasing frequency b The rise time of the output voltage is increased c A large surge current causing a high power dissipation in the load occurs when the load impedance is reduced rapidly 3 44 NEGATIVE V...

Page 23: ...IWl l l l I PROGR AMMlNG RESISTOR 1 1 11 1 1 1 1 FIGURE J 5 REMOTE VOLTAGE FIGURE 3 4 REMOTE RESISTANCE PROGRAMMINGICONSTANT VOLTAGE STRAPPING PATTERN 0 W o W PROGRAMMING RESISTOR FIGURE 3 6 REMOTE RESISTANCE PROGRAMMING CONSTANT CURRENT l STRAPPING PATTERN 0 At At A3 M 9 I Ae Al AT A TWO POWER SUPPLIES PROGRAMMING CONSTANT VOLTAGE STRAPPING PATTERN MAS1 tilt SI AV 1 Ij 101 01 Jj 1 Ii 1 ijYj 1 Al ...

Page 24: ...RN G Al A2 A3 A4 S S A A6 AT MASTER MUST BE MOST NEG ATIVE SLAVE MASTER MUST BE MOST NEG ATIVE SLAVE I SLAVE 2 II G G II MASTER SLAVE I FIGURE 3 10 AUTO SERIES STRAPPING PATTERN G Al A2 Al A4 S S A5 A6 AT B THREE POWER SUPPLIES A l Al Al A4 S S A5 A AT A TWO POWER SUPPLIES A4 S S AO Al AT Al Al Al A4 s S A5 A AT A l AZ Al A4 S S A5 A6 AT B THREE POWER SUPPLIES FIGURE 3 11 AUTO TRACKING STRAPPING P...

Page 25: ...WER RECTIFIER TRANS 8 FILTER FORMER ___ SCR REGULATOR t f SCR GATING REGULATOR CIRCUIT CONTROL TURN ON CIRCUIT FIGURE 4 1 BLOCK DIAGRAM p CURRENT INPUT 14 r R9 RIO CURRENT CONTROL R23 CURRENT MONITOR ING RESISTOR c J v c I DC c UTPUT oT ou_ R2 R8 r VOLTAGE CONTROL VOLTAGE INPUT ClfltCUIT ...

Page 26: ...tained by the bias and reference circuit 4 5 The voltage input circuit differential amplifier detects the error voltage that is proportional to the difference between the voltage across its programming resistors R2 R8 and the de output voltage The error voltage is amplified and passed through the gating circuit to the SCR regulator control which triggers the SCR regulator The SCR regulator increas...

Page 27: ...the filtered de output to protect the power supply from reverse voltage applied to the output terminals Resistor R23 is the current monitoring resistor the full bad current flows through it Resistors R25 and R27 are used to cali brate the voltmeter and ammeter respectively 4 14 VOLTAGE INPUT 4 IS GENERAL The voltage input circuit is basically a differential amplifier Ql Q2 that detects any voltage...

Page 28: ... The current input circuit is basically a differential amplifier 08 09 that detects any current difference between the programmed output current proportional to voltage across current controls and the actual output current pro portional to voltage across current monitoring resistor R23 The differential amplifier output voltage varies in proportion to the output current variation 4 2 2 08 09 INPUT ...

Page 29: ...ng C2 dis charged each time the power supply is turned on is to maintain the same time delay in the turn on of the gating circuit refer to para 4 26 4 29 SCR REGULATOR CONTROL See waveshapes on figure 4 2 4 3 0 GENERAL The SCR regulator control is basically a blocking oscillator Q7 and T3 that applies pulses to the SCR regulator in response to error signals detect ed by the voltage or current inpu...

Page 30: ...ished on capacitors C25 and C2 7 When the negative going pulsating de is at the end of its cycle C2 7 negatively charged earlier in the cycle by the feedback voltage CR44 and CR45 become forward biased and current flows from the 35 vdc bias through R52 CR46 and CR44 to dis charge C27 to approximately zero volts and through R52 CR46 and CR45 to charge C25 to approximately 0 7 volts clamped by CR49 ...

Page 31: ...he conduction period may be shortened at high output by the voltage across capacitor C 13 through C 16 being reflected back into the primary By con trolling the ac input to Tl each half cycle the average value of the voltage or current at the output of bridge rectifier CR19 through CR2 l is adjusted so that de output voltage or current is maintained constant 4 41 PROTECTION Diodes CR50 and CR5 l p...

Page 32: ...r manner The voltage across emitter resistors R3 8 and R40 is held constant by VR 3 CR2 7 and the base emitter drop of each transistor Thus the emitter current in each transistor is constant and therefore the collector currents are nearly constant The collector currents of OS and Q6 are the constant voltage a nd constant current programming currents respectively Resistors R39 and R41 are used for ...

Page 33: ...c input voltage accurate within 1 volt Oscilloscope Sensitivity 50mv cm Measure ripple and HP 130C min transient response Differential input Battery 120 vdc Measure transient response Switch a 5 ampere Transient response capacity Constant current load regulation Resistor 42 ohm 1 5 300 w Load resistor Rex Rheostat See note 2 Resistor 1 ohm 1 40 watt Current monitoring 4 terminals Resistor l 000 oh...

Page 34: ...oltage will have the required resolution for the measurement being made The voltage difference will be a function of the null detector that is used For measure ments at the base of transistor Q4 a null detect or with input impedance of 10 megohms or great er is required Otherwise satisfactory null detectors are HP 405AR digital voltmeter HP412A de voltmeter HP 419A null detector a de coupled oscil...

Page 35: ...rn front panel CURRENT con trols fully clockwise maximum adjust front panel VOLTAGE controls for 120 vdc and adjust rheostat until output current is 2 5 amperes POWER REFERENCE SUPPLY VOLTAGE UNDER SOURCE TEST NULL DETECTOR G FIGURE ll 1 DIFFERENTIAL VOLTMETER SUBSTITUTE TEST SETUP ...

Page 36: ...m up and read the measurement techniques para 5 3 5 3 MEASUREMENT TECHNIQUES 5 4 A measurement made across the load includes the effect of the impedance of the leads connecting the load these leads can have a n impedance several orders of magnitude greater than the output impedance of the power supply When measuring the output voltage of the power supply use the S and S terminals 5 5 For output cu...

Page 37: ...oting para 5 39 5 10 RATED OUTPUT AND METER ACCURACY 5 11 CONSTANT VOLTAGE Proceed as follows a Connect the 48 ohm load resistor across the output terminals and the differential voltmeter across the S and S terminals b Turn front panel CURRENT controls fully clockwise maximum c Tum front panel VOLTAGE controls until front panel voltmeter indicates l20 0 vdc d The differential voltmeter should indi...

Page 38: ...put Adjust the variable voltage transformer to 105 vac d Tum front panel VOLTAGE controls until the differential voltmeter indi cates 12 0 0 vdc e Adjust the variable voltage transformer to 125 vac f Differential voltmeter indication should change by less than 60 mvdc 5 15 CONSTANT CURRENT Proceed as follows a Connect test setup shown in figure 5 3 b Tum front panel VOLTAGE controls fully clockwis...

Page 39: ...TAGE controls fully clockwise maximum c Turn front panel CURRENT controls until front panel ammeter indicates 2 5 amperes d Record voltage indicated on differential voltmeter e Close the shorting switch f Differential voltmeter indication should change by less than 25 mvdc 5 19 RIPPLE AND NOISE 5 20 Proceed as follows a Connect the 48 ohm load resistor across the output terminals and the ac voltme...

Page 40: ...amperes d Open and close the switch several times and observe the oscilloscope display e Oscilloscope display should be as shown in figure 5 5 OSCILLOSCOPE llir 130C I t l 12GVDC I 1111 NOTE OSCILLOSCOPE MUST BE 0 C COUPLED s POWER I J I u SUPPLY UNDER TEST 96n I I llt X H OSTAT I 96J r 10UR 4 TRAHStENT RECOVERY TIM TEST SETUP 300 MSEC H l 500 MV FULL LOAD HALF LOAD HALF LOAD FULL LOAD OURE TRANSI...

Page 41: ... and allow a half hour warm up g Differential voltmeter indica tion should change by less tha n 900 mvdc from indication recorded in step e 5 26 CONSTANT CURRENT Proceed a s follows a Connect test setup shown in figure 5 3 b Tum front panel VOLTAGE controls fully clockwise maximum c Tum front panel CURRENT controls until the differential voltmeter indi cates 2 5 vdc d Insert the power supply into ...

Page 42: ...d then record the differential voltmeter indication e After eight hours the differential voltmeter indication should change by less than 25 mvdc 5 30 REMOTE PROGRAMMING 5 31 CONSTANT VOLTAGE Proceed as follows a Turn off power supply and arrange rear terminal strapping pattern for constant voltage remote programming as shown in figure 3 4 use the resistance box set to 15 QOOohm for the remote prog...

Page 43: ...25 b Connect test setup shown in figure 5 3 c Turn front panel VOLTAGE controls fully clockwise maximum d Turn on power supply allow a half hour warm up and then record the differential voltmeter indication e Increase the remote programming resistance in 25 ohm steps to 100 ohms record the differential voltmeter indication at each step The voltage indication should increase 2 50 _ 2S mvdc at each ...

Page 44: ...cross oscillator output terminals using the ac voltmeter f Using the formula given in step e calculate and record the output imped ance for oscillator frequencies of 100 cps 1 kc and 100 kc g The output impedance calculated and recorded in steps e and f should fall into the following ranges 1 de to 0 5 cps less than 0 1 ohm 2 0 5 cps to 100 cps less than 2 0 ohm 3 100 cps to 1 kc less than 0 5 ohm...

Page 45: ... it and then do the performance check para 5 7 If a part is replaced refer to repair and replacement para 5 50 and to adjustments and calibrations para 5 51 5 42 TROUBLE ANALYSIS 5 43 GENERAL Before attempting trouble analysis a good understanding of the principles of operation should be acquired by reading Section IV of this manual Once the principles of operation are understood logical applicati...

Page 46: ... Turn front panel CURRENT controls fully clockwise maximum b Turn front panel VOLTAGE controls to mid position c Turn on power supply no load connected d Using the ac voltmeter check voltage across test points ACC and 45 If voltage indication is less than 1 0 vac CRl7 or CRIB may be shorted e Using the differential voltmeter check voltage across test points 33 and 36 Ifvoltageisnot0 B t 0 12vdc ch...

Page 47: ...he SCR may be defective To check the gate circuit disconnect R54 or R55 as applicable and make an ohmmeter check from the open end of the resistor to test point ACC or 45 as applicable If the resistance is greater than 55 ohms the gate circuit is defective b If there is no ripple waveform both CRl 7 and CR18 may be open or T1 may be defective g Using the differential voltmeter proceed as instructe...

Page 48: ...it board will result l Apply heat sparingly to lead of component co be replaced If lead of component passes through an eyelet in thec ircuit board apply heat on com ponent side of board If lead of component does not pass through an eyelet apply heat to Con ductor side of board 3 Bend clean tinned leads on new part and care fully insert through eyelets or holes in board 2 Reheat solder in vacant ey...

Page 49: ... Rotate voltmeter zero set screw figure 3 1 clockwise until the meter pointer is to the right of zero and moving to the left towards zero Stop when point er is on zero If the pointer overshoots zero continue rotating clockwise and re peat this step c When the pointer is exactly on zero rotate the zero set screw counter clockwise approximately 15 degrees to free the screw from the meter suspension ...

Page 50: ... Choose resistor R39 shunt equal to the resistance required in step e 5 62 ZERO VOLTAGE OUTPUT 5 63 Proceed as follows a Connect a jumper between the S and A7 terminals on the rear terminal strip of the power supply b Connect the differential voltmeter between the S and S terminals c Connect the resistance box in place of R6 d Adjust the resistance box so that the voltage indicated by the differen...

Page 51: ...tial voltmeter is between zero and 5 Omvdc e Choose resistor R20 equal to the resistance value required in step d NOTE If the resistance value required is less than 7 000 ohms or greater than 17 000 ohms change R46 Replace the original R2 0 5 6 8 BIAS AND REFERENCE LINE REGULATION 5 69 Proceed as follows a Connect the variable voltage transformer between the input power source and the power supply...

Page 52: ...ect the variable voltage transformer between the input power source and the power supply power input Adjust the variable voltage transformer to 125 vac d Turn front panel VOLTAGE controls until front panel ammeter indicates 2 5 amperes e Connect the oscilloscope across test points 18 and 48 Use internal sync f Connect the resistance box in place of Rl 7 g Adjust the resistance box until the oscill...

Page 53: ...m resistor to 9 megohms set the variable voltage transformer to 105 vac open the shorting switch record the differential voltmeter indication and repeat steps c and d Repeat this process reducing the 10 megohm resistor in I megohm steps until the voltmeter change is less than 25 mvdc Changes smaller than I megohm may be required to obtain the optimum resistance value for R44 Choose resistor R44 eq...

Page 54: ...2 4 0 1 0 vdc 19 0 72 O 1 vdc A6 0 04 O 1 vdc 8 0 45 0 07 vdc s 0 06 4 0 1 vdc s 0 82 0 l vdc 19 1 14 O 2 vdc 16 1 0 0 5 vdc 32 7 0 l l vdc 36 0 8 0 1 vdc 42 46 O 2 3 vpp 33 66 0 3 3 vpp 38 14 0 4 1 4 vdc NOTE These measurements were made with a 115 volt 60 cps single phase power input the front panel CURRENT controls fully clockwise maximum the front panel VOLTAGE controls set for 120 vdc out put...

Page 55: ... Q6 7 51 21 9 7 i O 5 vdc R38 R42 Q5 Table 5 4 High Output Voltage Troubleshooting Meter Meter Step Common Positive Response Probable Cause 1 Emitter of Q4 29 o 5 vdc a Q4 shorted b Rl6 shorted c Rl5 shorted 2 14 17 O 85 vdc CR7 open 3 14 33 2 vdc a Ql open b Q2 shorted c CRl shorted d R2 R8 open Table 5 5 Low Output Voltage Troubleshooting Meter Meter Step Common Positive Response Probable Cause ...

Page 56: ...constant current input circuit c Constant voltage loop oscillates Check adjustment of Rl 7 para 5 71 a Check bias and reference circuit para S 4S Refer to paragraph S 69 for adjustment b Power supply going into voltage limit Check constant voltage input circuit c Constant current loop oscillates Check adjustment of R44 para S 73 a Check operating setup for ground loops b If output is floating ungr...

Page 57: ...ustment of Rl 7 para 5 71 constant voltage Oscillates Check C6 C24 R22 and adjustment or R20 para 5 66 constant current and adjustment of R44 para 5 72 Output voltage does Check R6 and R4 7 Refer to para 5 63 not go to zero Output current does Check R20 and R46 Refer to para 5 6 7 not go to zero 5 22 ...

Page 58: ...er 010 Bias and reference error detector amplifier 011 Bias and reference series regulator CRl CR2 Constant voltage protection CR28 CR6 CR9 Forward bias regulators CRl 0 CRl l CR12 CR14 CR27 CR46 5 23 Excessive transients at tum on Constant voltage constant current line and load regula tion Constant voltage program R38 R39 ming coefficient Constant current program R40 R4 l ming coefficient Wavefor...

Page 59: ...tion Constant current line and load regulation CR30 CR31 Full wave rectifier Rectifier output 6 7 vdc CR39 CR40 Bridge rectifier Voltage acros s bridge CR41 CR42 20 25 peak full wave CR43 CR5 CR7 Diode s witches CR8 CR44 CR45 CR47 CR48 CR49 CRSO CR51 VRl Constant voltage program Full output voltage and zero ming protection output voltage obtainable via VOLTAGE controls volt age regulation at 120 v...

Page 60: ...r Spring Voltmeter Tracking 5 57 R25 Ammeter Tracking 5 59 R27 Constant Voltage Programming Current 5 61 R39 Zero Voltage Output 5 63 R6 Constant Current Programming Current 5 55 R4 l Zero Current Output 5 67 R20 Bias a nd Reference Line Regulation 5 69 R45 Line Imbalance 5 71 Rl7 Constant Current Load Regulation 5 73 R44 5 25 ...

Page 61: ......

Page 62: ... ORDERING INFORMATION 6 5 To order a replacement part address order or inquiry to your local Hewlett Packar d field office see lists at rear of this manual for addresses 6 6 Specify the following information for each part A Model and complete serial number of instrument B Hewlett Packard stock number C Circuit reference designator D Dascription 6 7 To order a part not listed in the tables give a c...

Page 63: ...f farads rect rectifier fxd fixed rot rotary GE germanium rms root mean square grd ground ed s b slow blow h henries sect section s Hg mercury Si silicon impg impregnated sil silver ins insulation ed sl slide lin linear taper td time delay log logarithmic taper Ti02 titanium dioxide m milli 10 3 tog toggle M megohms tol tolerance ina milliamperes trim trimmer µ micro lo 6 twt traveling wave tube m...

Page 64: ... lif 10 4 11 Ti T I Inc Berhlty Calif 10 6 4 6 Carborundum Co Nia9ara F tls N Y 1 1 2 l CTS of Berne Inc Berne Ind 1 1 2 l 7 Chicd90 Telephone of California Inc So P uadeno Calif 1 1 l 1 2 Microw1ve Electronics Cot p P o Alto Calif 1 1 S l 4 Dunc n Electronics Inc Sant Al l1 C lif 1 1 7 1 1 General Instrument Corporation Semiconductor Division Newark N J 1 1 7 1 7 Imperial Electronics Inc Buen Par...

Page 65: ...ton H1i9hh P R dio Cor p of America RCA Electron Tube Div H rti1on N J Philco Corp l1nsdal1 Division l nsdalo Pa Western Fibrous Gl u Produch Co S n Fr ncisco C lif Cutler H mmer l c Lincoln Ill Gould N ation I l ttui11 Inc St P ul Minn G ntral Electric Dhtributin9 Corp Schenecl dY N Y Carter Parts Div of Economy 8 altr Co 8 4 4 5 United Transformer Co Chicaqo Ill Chica90 Ill 9 0 1 7 9 U S Rubber ...

Page 66: ...ssigned CR17 18 SCR 7A 200prv 2 C20B G E 03508 2 CR19 23 Rect sil 3A 200prv 5 MR1032B Motorola 0471 3 5 CR30 31 Rect sil 500ma 200prv 2 1N3253 R C A 02735 1901 0026 2 DSl Indicator Light neon l 858 R Sloan 08717 145 0 0048 l Fl Fuse lOA 250v 3AB l 314010 Littlefuse 75915 5 Ql 4 6 8 9 SS NPN sil 7 2N3391 G E 03508 1854 0071 6 QS SS NPN sil l SM8747 T I 01295 l Q7 ll SS NPN sil 2 2N3417 G E 03508 2 ...

Page 67: ...gray stranded plug PH15l 1 Strain Relief 1 Nut captive 12 Fastener 1 Rubber bumper black 55 60 Durmo hard 4 Mfr Part or Type Type C42S 2BR 37 Type 110 F4 Type 110 F4 Type lOXM Type C42S Type C42S 2BR 37 2GK50 62 643392 lN2163 602 Y 3 10100 11 422 13 11 013 DF21RC DF21BC 342014 KH 4629 SP 6P3 4 C8091 632 4 C684 1024 4 3066 6443B 6 6 Mfr Mfr Code Stock No A Corning 16299 0698 3614 1 A B 01121 0686 3...

Page 68: ... Points 37 33 lms cm I v cm F Same as C except Q7 fires later due to smaller load 2v 3a I Test Points 45 AC 2ms cm 50v cm All waveforms were taken with 115 volt 60 cps single phase input and 60 vdc 5 ampere load except E and F as indicated Waveforms H and I require the oscil loscope to be ungrounded If it is not desirable to unground the oscilloscope use a 1 kva isolation transformer between the i...

Page 69: ...R4 l t J CRH µ 1 ll t _S C28 1 n T BoV C3 _ 0022J T 200V CR 7 CR45 3 4 I zoov I J J Q 7 31 cz s l 1 i T 35V R53 IOK t_ CR 4q I I I I _ _ _ _ _ _ _ J I I I I I I I I I R11LJ c0 11 3k s f I I 11 GSV 11 11 L r 3 Q3 I I 1 I 1 j_ C2 I _ l_ 1 22 tI i4 f CF 8 I 3K I c I l_JJ S I i I I ct Cl T L r VRI t I I I I I QI a 75K 3 B 7 I v rICR 2 t 4f CiYO 1 __ I I I I I CRll L I T 1 00 f OV _J I I 4 l 7 R4 1 _ R...

Page 70: ...R25 Should be lOK Type 110 On the schematic remove Cl 2 from AC line and connect to A CC line anode of CRIB Throughout the manual change model from 6443A to 11 6443811 In Table 1 1 and in the applicable portions of the specification checks in Section V make the following changes TEMP COEFFICIENT Change constant voltage temperature coefficient to o 03 plus 20mv OUTPUT STABILITY Change constant volt...

Page 71: ...e manufacturing number letter code and the third part is the serial number This manual applies to all Model 64438 power supplies with the same manufacturing code given in the title page Change sheets are included in the manual to update it to reflect the latest engineering changes In Figures 3 2 through 3 11 change the and terminals adjacent to the s and S terminals to AB and A9 respectively to ec...

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