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Содержание 3400A

Страница 1: ...OPERATING AND SERVICE MANUAL RMS VOLTMETER 3400A J MOO VOLIWIt HEWLETT MPACKARD J ...

Страница 2: ...ewlett Packard will at its option repair or replace products which prove to be defective during the warranty period provided they are returned to Hewlett Packard and provided the proper preventive maintenance procedures as listed in this manual are followed Repairs necessitated by misuse of the product are not covered by this warranty NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT ...

Страница 3: ...rt number listed above If unable to obtain above part numbers replace all three components with part numbers specified in Table 7 1 This is necessary to maintain the same oscillator frequency provided by the above component values CHANGE NO 5 For Serial Numbers 1218A18576 and Greater Page 6 9 6 10 Fig 6 4 Change T1 lead designation color codes as follows OLD Primary Side YEL L BLU GRN L VIO NEW BL...

Страница 4: ...ations throughout the entire man ual Page 7 3 Table 7 1 Delete P C Assy ATTEN 03400 66501 1 ea Add P C Assy ATTEN 03400 66511 1 ea The P C assemblies are completely interchangeable CHANGE NO 16 09 14845 applies to serial numbers 1218A21281 and greater Page 7 5 Delete Q2 Q3 XSTR GE SP1822 1850 0038 2 ea Add Q2 Q3 XSTR PNP 2N5875 1853 0305 2ea Page 7 8 Table 7 1 Delete R731 R F 5360 OHM 01 0698 3258...

Страница 5: ...ER SERIALS PREFIXED 1140A Appendix C Manual Backdating Changes adapts this manual to instruments with serial numbers 0979A13725 and below and serials prefixed 322 401 528 and 714 Copyright Hewlett Packard Company 1965 P O Box 301 Loveland Colorado 80537 U S A Printed JUNE 1972 ...

Страница 6: ...n V MAINTENANCE 5 1 Introduction 5 3 Test Equipment 5 5 Performance Checks 5 7 Accuracy Linearity and DC Out put Check 5 9 Frequency Response Check 5 10 Input Impedance Check 5 13 Crest Factor Check 5 14 Output Noise Check 5 15 Adjustment and Calibration Procedures 5 17 Mechanical Meter Zero 5 19 Power Supply Checks 5 21 Low Frequency Calibration 5 25 High Frequency Calibration 5 29 Troubleshootin...

Страница 7: ... 10 5 8 Output of Demodulator feedback loop open 5 10 5 9 Neon Drive Voltage 5 11 5 10 Collector of Q602 feedback loop open 5 12 5 11 Base of Q604 feedback loop open 5 12 Number Page 5 12 Base of Q601 feedback loop open 5 13 6 1 Input Attenuator Al Impedance Converter A2 and Second Attenuator A3 Schematic and Parts Location Diagram 6 3 6 4 6 2 Video Amplifier A4 Schematic and Parts Location Diagra...

Страница 8: ...to meter deflection 1 mA maximum nominal source impedance lOOOfi OUTPUT NOISE 1 mV RMS CREST FACTOR ratio of peak to rms ampli tude of input signal 10 1 at full scale except where limited by maximum input inversely proportional to meter deflection e g 20 1 at half scale 100 1 at tenth scale INPUT IMPEDANCE 0 001 V to 0 3 V range 10 Mfi shunted by 50 pF 1 V to 300 V range 10 MS2 shunted by 20 pF AC...

Страница 9: ... 2 MHz to 3 MHz and 5 from 10 Hz to 50 Hz and 3 MHz to 10 MHz A single front panel control selects one of 12 voltage or decibel ranges 1 6 The Model 3400A crest factor rating is 10 1 which enables full scale readings for pulses which have a 1 duty cycle At l 10th of full scale pulse trains with 0 01 duty cycle 100 1 crest factor can be accurately measured 1 7 The Model 3400A provides a dc output w...

Страница 10: ...se However when used in combination with other submodular units it can be bench and or rack mounted The hp combining case and adapter frame are designed for this purpose 2 10 COMBINING CASE hp Models 1051A or 1052A 2 11 The combining case is a full module unit which accepts various combinations of submodular units Being a full module unit it can be bench or rack mounted and is analogous to any ful...

Страница 11: ...ack which enables application of input signal to instruments measuring circuits 7 115 230 volt switch two position slide switch which sets instrument to operate from either a 115 or 230 volt ac source 8 Input power jack three prong jack which enables application of line voltage to instru ments power supply circuits 9 115V 230V 25A FUSE 0 25 ampere fuse which provides protection against line voltag...

Страница 12: ...AL SUPERIMPOSED ON A DC LEVEL ALWAYS SET THE RANGE SWITCH TO THE 300 VOLT POSITION A HIGH VOLTAGE TRANSIENT DUE TO THE APPLICATION OF A DC VOLTAGE WILL DAMAGE THE INPUT CIRCUITRY c Connect test lead to point to be measured d Rotate RANGE switch counterclockwise until meter 1 indicates on upper two thirds of scale 3 9 APPLICATIONS 3 10 The Model 3400A can be used in conjunction with other test inst...

Страница 13: ...Section IV Model 3400A Ck i fc 4 0 ...

Страница 14: ...e thermocouple pair TC401 and TC402 acts as a summing point for the ac output of the video amplifier A4 and the dc output of the emitter followers The difference in the heating effect of these voltages is felt as a dc input to modulator A5 This difference input is amplified and is fed to TC402 and to meter Ml This amplified dc voltage represents the rms value of the ac signal applied at the INPUT ...

Страница 15: ... negative feedback is applied to the emitter of input amplifier Q401 and establishes the overall gain of the video amplifier 4 26 Trimmer capacitor C405 is adjusted at 10 MHz for frequency response of the video amplifier Diodes CR402 and CR406 are protection diodes which prevent voltage surges from damaging transistors in the video amplifier CR401 CR407 and CR408 are temperature compensating diode...

Страница 16: ...CR704 CR713 and CR706 across the base emitter junction of the series regulator provide overload current protection 4 42 75 VOLT SUPPLY 4 43 The 75 volt supply consists of a full wave rectifier CR701 and CR702 whose output is filtered by CIA and C1B and regulated by series regulator Ql The 75 volt supply provides regulated 75 volts which is used as the plate supply voltage for V201 Voltage variatio...

Страница 17: ...00 Hz Accuracy 1 count Time Interval 1 isec Performance Checks hp Model 5233 L Electronic Counter Peak Responding Voltmeter Voltage Range 0 5 V to 300 V Accuracy 3 full scale Performance Checks hp Model 410C Voltmeter Average Responding Voltmeter Voltage Range 0 001 to 300 V Accuracy 1 full scale Adjustment and Calibration Troubleshooting hp Model 400E EL Voltmeter Current Supply Ohmmeter Output 5...

Страница 18: ...earity and dc output test set up is illustrated in Figure 5 1 A Voltmeter Calibrator hp Model 738B and a DC Voltmeter hp Model 3440A 3443A are required for this test Connect test setup illustrated in Figure 5 1 Set Model 3400A RANGE switch to 0 001 position Adjust Voltmeter Calibrator for 0 001 volt rms 400 Hz output set the DC Voltmeter to measure 1 volt a b c d e If Model 3400A does not indicate...

Страница 19: ...ator output frequency to values listed under frequency in Table 5 3 adjust oscillator output voltage to maintain reference level set in step d If Model 3400A does not indicate within values under meter reading in Table 5 3 perform high frequency calibration procedures Para graph 5 25 Table 5 3 Frequency Response Check FREQUENCY METER READING 15 Hz 0 95 to 1 05 45 Hz 0 95 to 1 05 100 Hz 0 99 to 1 0...

Страница 20: ...eater than 0 707 volts This corresponds to an input shunt capacity of less than 50 pF e Set Model 3400A Range switch to 1 V position and repeat step c f Change Test Oscillator frequency to 40 kHz maintaining the reference level set in step c The Model 3400A reading should be greater than 0 707 volts This corresponds to an input shunt capacity of less than 20 pF 5 13 CREST FACTOR CHECK a Connect te...

Страница 21: ...for the Model 3400A These procedures should be conducted only if it has previously been established by Performance Checks Paragraph 5 5 to 5 14 that the Model 3400A is out of adjustment Indiscriminate adjustment of the internal controls to refine settings may actually cause more difficulty If the procedures outlined do not rectify any maladjust ments that may exist and you have carefully rechecked...

Страница 22: ...or 0 01 volt rms 400 Hz output NOTE The 1 10 SCALE ADJUST should be set slightly low needle s width to reduce meter needle offset with shorted input c Adjust R7 1 10 SCALE ADJUST for Model 3400A 1 10 scale meter indication Change value of R8 if it is necessary to increase the adjustment range of R7 The range of R8 is from approximately 270 ohms to 430 ohms See Table 5 7 5 24 1 VOLT ADJUSTMENT a Co...

Страница 23: ... 10 MHz maintain test oscillator output voltage to reference level set in step d If Model 3400A meter reading varies more than 1 to 1 MHz 2 from 1 MHz to 2 MHz 3 from 2 MHz to 3 MHz or 5 from 3 MHz to 10 MHz re adjust C102 until optimum response is obtain ed 5 28 SECOND ATTENUATOR ADJUSTMENT C NOTE The Test Oscillator used in this procedure should be calibrated at the end of its output cable a Con...

Страница 24: ...2A in ohms function on X100 range between ground and junction of C413 and C415 on A4 board this step checks the resistance of heater in TC401 412A should indicate between 76 5 to 103 5 ohms If not within limits replace the matched set of thermocouples hp Part No 0853 0003 Leave the 412A connected as in Step b 412A is used to supply 5 mA of current to heater of TC401 in this step Connect a DC Volt ...

Страница 25: ...tion V Model 3400A 5 8 PASSES FAILS D i 5 NOTE Each check in this tree is referenced to troubleshooting procedures outlined in Table 5 6 5 2j Kg 30 D Figure 5 5 Troubleshooting Tree i A J3 H i D H H 2 V c ...

Страница 26: ... Do not use an extender board for measurements on Chopper Amplifier board A6 Measure ac signal at junction of C605 and Demodulator V503 and V504 Refer to Figure 5 6 for waveform Figure 5 6 Input to Demodulator Table 5 6 Troubleshooting Procedure Cont d CHECK PROCEDURE ACTION Investigate meter Ml R5 and R6 for opens Remove the input to 3400A Unsolder red lead from pin 13 A6 and insert a 10 mV dc si...

Страница 27: ... dc signal at pin 9 A6 Reading should be approximately 1 65 Vdc Investigate R619 R4 and thermocouples See Paragraph 5 34 for thermocouple check Investigate Q606 and associated circuit Measure the ac signal at base of Q605 Refer to Figure 5 8 for waveform ACTION PASSES FAILS PASSES FAILS Proceed to Proceed to Proceed to Proceed to PASSES FAILS Proceed to Proceed to I BASE OF Q605 Insert 10 mV signa...

Страница 28: ...otential most negative point on wave form is normally between 50V and 60V If the waveform displays noise nonlinearity at both extremities jitter will occur on the meter If the waveform displays a noise replace the neon subassembly as outlined in Paragraph 5 41 PIN 3 OR 5 ON A6 Sweep 2 ms cm Vertical 20V cm DC coupled use 10 1 probe Figure 5 9 Neon Drive Voltage Table 5 6 Troubleshooting Procedure ...

Страница 29: ...edback loop open Table 5 6 Troubleshooting Procedure Cont d CHECK PROCEDURE ACTION 13 Measure the ac signal at base of Q604 Refer to Figure 5 11 for waveform PASSES Proceed to FAILS Proceed to V LnnJU BASE OF Q604 Insert 10 mV signal through 499 kft resistor to pin 13 on A6 Sweep 5 ms cm Vertical 5V cm AC coupled no probe required Figure 5 11 Base of Q604 feedback loop open 5 12 01768 4 ...

Страница 30: ...required Figure 5 12 Base of Q601 feedback loop open Table 5 6 Troubleshooting Procedure Cont d CHECK PROCEDURE ACTION Investigate Q601 and associated circuit Investigate V501 V502 C601 C602 and R601 See Paragraph 5 39 for photochopper check Check chopper neon voltage Referto Figure 5 9 for waveform See check number ll for details Measure the ac signal at the output of impedance converter A2 negat...

Страница 31: ...ion should be negative with respect to reading in step c and within 1 mV of that reading f Remove the DC Voltmeter and 412A from 3400A Connect the 4 12A between pins 11 and 14 on A6 socket this steps checks for thermocouples shorted to ground through cover Indication of 412A should be greater than 200 kft If less than 200 kfi look for short to ground 5 37 thermocouple replacement cautions exercise...

Страница 32: ...uld indicate 10 kft this checks the dynamic series resistance of the modulator g Turn off the 3400A and disconnect ohmmeter h 01768 3 Ground pin 13 on A6 board Connect ohm meter between ground and junction of V501 and V502 Section V i Turn on the 3400A The ohmmeter should indicate 7 kft this checks the dynamic parallel resistance of modulator j Turn off the 3400A Disconnect all connec tions made i...

Страница 33: ...nt as possible and then remove Excess heat can cause the circuit and board to separate or cause dam age to the component c Component lead hole should be cleaned be fore inserting new lead d To replace components shape new leads and insert them in holes Reheat with iron and add solder as required to insure a good elec trical connection e Clean excess flux from the connection and adjoining area CAUT...

Страница 34: ...708 0 6 1 0 n Rfl n R1 599 0 608 0 5 1 0 49 0 R1 0 492 0 508 0 4 1 0 0 39 0 41 392 0 408 0 3 1 0 n 99 0 31 n 9 99 0 308 0 2 1 0 19 n 91 199 0 208 0 1 1 0 0 090 n 11 0 099 0 108 3 0 3 0 9 97 ana 949 0 957 10 0 10 0 9 9n 10 10 n 999 1 008 30 0 30 0 9 9 7 an r a n 949 0 957 100 0 100 0 99 101 0 0 992 1 008 300 0 300 0 997 303 0 0 942 0 957 FREQUENCY RESPONSE CHECK _ Meter Frequency mmmT 1 05 ish n 9R...

Страница 35: ...7 The parts location diagrams show the physical location of parts within an assembly Parts are 6 3 SCHEMATIC DIAGRAMS identified by reference designation A parts location diagram is included for each assembly which does not 6 4 The schematic diagrams depict the circuits have adequate silk screening of reference designations contained within each assembly of the 3400A as well as assembly interconne...

Страница 36: ...TER CHASSIS J_ So7 DENOTES CIRCUIT GROUND ON PRINTED CIRCUIT ASSEMBLY 4 DENOTES ASSEMBLY DENOTES MAIN SIGNAL PATH DENOTES DC FEEDBACK PATH DENOTES AC FEEDBACK PATH DENOTES SHIELD 5 DENOTES FRONT PANEL MARKING L DENOTES REAR PANEL MARKING DENOTES SCREWDRIVER ADJUST 6 v s Sk DENOTES COMPONENTS NOT MOUNTED ON 1 ASSEMBLY 7 AVERAGE VALUE SHOWN OPTIMUM VALUE SELECTED AT FACTORY SEE TABLE 5 7 8 DENOTES S...

Страница 37: ...R VARIATIONS FROM INSTRUMENT TO INSTRUMENT 2 ALL AC VOLTAGES ARE UNDERLINED ALL DC VOLTAGES HAVE A POLARITY INDICATION I R305 C305 R304 TAN FROM BLK TO C4 GY TO A2 8 R303 _ h fl R302 B BLU TO A2 2 f C302 R30 7 i a BLU TO GRN FROM A2 7 RIOI 3400A A OI07 R3I2 C303 R3IO C304 R3II R307 I R309 R308 hp A3 PART NO 03400 63401 BOARD ONLY ...

Страница 38: ...D ilJSB COPYRIGHT 1965 BY HEWLETT PACKARD COMPANY 6 3V REGULATED FILAMENT VOLTAGE FROM 03 VIDEO AMPLIFIER OSmV A4 hp PART NO 03400 66501 E A2 hp PART NO 03400 66502 Figure 6 1 1 BLU A7 I0 2 8LU A3R302 3 GY 03 EMITTER 4 GY C2 5 RED A7 I8 6 GY C4 i 7 BLU S30I e GY A3R305 cb Input Attenuator Al Impedance Converter A2 and Second Attenuator A3 Schematic and Parts Location Diagram 01768 4 6 3 6 4 ...

Страница 39: ...LTAGES ARE UNDERLINED ALL DC VOLTAGES HAVE A POLARITY INDICATION 3 AC VOLTAGE LEVELS AT Q405 AND Q406 MUST BE OBSERVED WITH 10 1 DIVIDER PROBE 4 IF C427 IS REPLACED IT MAY BE NECESSARY TO SELECT THE VALUE OF C427 FOR PROPER FREQUENCY RESPONSE THIS IS DUE TO CAPACITOR TOLERANCE AMPLIFIER INPUT CABLE ASSEMBLY 03400 61601 CHOPPER INPUT CABLE ASSEMBLY 03400 61602 A4 hp PART NO 03400 66503 ...

Страница 40: ...BACK AC INPUT FROM SECOND ATTENUATOR A3 R4I7 6800 AAA CR408 CR40I tt r C4I0 300 PF u C42I 300 PF CR407 MI9 R420 6800 1 AMPLIFIER OUTPUT I TO THERMOCOUPLE TC40I C4I5 20 COPYRIGHT 1965 BY HEWLETT PACKARD COMPANY Figure 6 2 Video Amplifier A4 Schematic and Parts Location Diagram 01768 3 6 5 6 6 ...

Страница 41: ... C6I3 ll 1 c 15 C603 JU _ CR60I Q6QA V503 V50I in R606 C h R607 A5 ASSY R609 R62I 5 R608 CR603 R630 R6I9 CV A h S ceo5 M R6I8 C604 R63I q605 R6I5 R632 _R6I6 C E CR604 n C606 LI r c 1 C609 R6I0 r 1 C6I2 1 1L T B R6I7 f_ R620 c v_ C608 f R624 C607 R625 R623 A6 hp PART NO 03400 66508 ...

Страница 42: ...IC APPLIES TO SERIALS PREFIXED 806 AND ABOVE SEE APPENDIX C FOR SERIALS 714 AND BELOW w FULL SCALE CW ADJ R6 J COPYRIGHT 1965 BY HEWLETT PACKARD COMPANY 01768 4 Figure 6 3 Photochopper A5 Chopper Amplifier A6 and Thermocouple Pair Part of A4 Schematic and Parts Location Diagram 6 7 6 8 ...

Страница 43: ... 1 o O o or or 1 I I 1 TYV 1 1 C70 CR7I4 R720 R7I8 CR7I5 CR720 CR7I3 CR706 R709 CR705 i i i i i i i in O r or i R7I0 R7I5 o o OJ ce O or i 3 o s cr Q703 Q704 Q705 Q702 Q70I cr r 1 T 1 a a a oo O706 w rh VVTfgyTfTf R708 R724 CR704 CR7I8 to r or T CR7I9 CR702 o O l V M VJ 3400A B 2672 MODEL 3400A RMS VOLTMETER ...

Страница 45: ... Al aluminum impg impregnated seconds SPDT single pole double A ampere s incd incandescent nsr not separately replace throw An gold ins insulation ed able SPST single pole single C cer coef com capacitor ceramic coefficient common kfi kHz kilohm s 10 ohms kilohertz 10 hertz SI obd OD ohm s order by description outside diameter Ta TC TiO z throw tantalum temperature coefficient titanium dioxide com...

Страница 46: ... 3 module Side Cover 6x11 sm Frame Assembly Top Cover with handle Rear Panel Bottom Cover 5x11 sm Foot Assembly 1 3 module Spacer 1 3 module Hinge Tilt Stand 1 3 module 03400 00204 5020 5388 5000 8565 5060 0703 03400 64103 03400 00203 5000 8571 5060 0727 5020 6852 5040 0700 1490 0031 Figure 7 1 Modular Cabinet 7 2 ...

Страница 47: ...12CC2 DSM C206 0140 0201 1 C fxd mica 12 pF 5 500 vdcw 04062 DM15C120J C207 0180 0061 1 C fxd elect 100 xF 10 100 15 vdcw 56289 30D172A1 C208 0150 0093 3 C fxd cer 0 01 ji 20 80 100 vdcw 91418 TA obd C209 thru Not assigned C301 C302 0160 0987 C fxd mica 12 pF 5 500 vdcw 72136 obd C303 0121 0039 1 C var 8 50 pF 72982 557 062 U2PO 34R C304 0160 0196 1 C fxd mica 24 pF 5 72136 obd C305 0160 0987 2 C ...

Страница 48: ...lect 10 iF 100 10 150 vdew 56289 30D218A1 C703 0160 0166 1 C fxd my 0 068 iF 10 200 vdew 56289 192P68392 PTS C704 0180 0089 C fxd elect 10 iF 100 10 150 vdew 56289 30D218A1 C705 0150 0012 1 C fxd cer 0 01 iF 20 1000 vdew 56289 H1038 obd C706 C707 0180 0050 2 C fxd elect 40 mF 100 15 50 vdew 56289 D32538 C708 thru C709 C710 0180 0105 1 C fxd elect 50 iF 25 vdew 56289 S97441 0180 0098 1 C fxd elect ...

Страница 49: ...ne open circuit Connector AC power cord receptacle Connector PC 22 contact Connector PC 15 contact Meter full scale 3 mA Meter dB scale uppermost Option 01 only TSTR Ge PNP selected TSTR Ge PNP Not assigned TSTR Si NPN Not assigned TSTR Si PNP TSTR Si PNP 2N708 TSTR Si PNP TSTR Si ftNft 2N708 Not assigned TSTR Si PNP 2N3906 TSTR Si NPN 2N3391 TSTR Si PNP 2N3638 Not assigned TSTR TSTR TSTR TSTR Si ...

Страница 50: ...m 410 26ft 0 1 1 4 W 91637 91637 91637 91637 91637 91637 MFF 1 4 T1 MFF 1 4 T 3 MFF 1 4 T 3 MFF 1 4 T 3 MFF 1 4 T 3 MFF 1 4 T 3 R307 R308 R309 R310 R311 0698 4118 0698 4119 0698 4118 0698 4119 0698 4117 1 R fxd met flm 277 48ft 0 1 1 4 W R fxd met flm 410 26ft 0 1 1 4 W R fxd met flm 277 48ft 0 1 1 4 W R fxd met flm 410 26ft 0 1 1 4 W R fxd met flm 189 72ft 0 1 1 4 W 91637 91637 91637 91637 91637 ...

Страница 51: ...ft 5 1 4 W 01121 CB 2235 R617 0758 0043 1 R fxd met flm 1800ft 5 1 2 W 75042 CE 57 R618 0727 0100 1 R fxd depc 1000ft 1 1 2 W 56289 428E R619 0727 0063 1 R fxd depc 292 4ft 1 1 2 W 56289 428E R620 0683 1245 1 R fxd comp 120 kft 5 1 4 W 01121 CB 1245 R621 0727 0013 1 R fxd depc 24 3ft 1 1 2 W 56289 428E R622 0683 3925 R fxd comp 3900 ft 5 1 4 W 01121 CB 3925 R623 0683 3945 1 R fxd comp 390 kft 5 1 ...

Страница 52: ...et flm 5 36kft 1 1 8 W R fxd comp 2700ft 5 1 4 W Switch toggle SPST 3 amp 250 V Switch slide marked 115 230 V Not assigned Switch rotary 3 sect 12 pos Transformer Thermocouples matched pair Electron Tube 7586 nuvistor triode Power Cord 7 1 2 ft Fuseholder extractor post type 2 5 64 long Socket nuvistor 5 pin Socket transistor MISCELLANEOUS Knob bar with one arrow Insulator transistor anodized alum...

Страница 53: ...Transistor Electronics Corp Minneapolis Minn Westinghouse Electric Corp Electronic Tube Div Elmira N Y Filmohm Corp New York N Y Cinch Graphik Co City of Industry Cal Silicon Transistor Corp Carle Place N Y Avnet Corp Culver City Cal Fairchild Camera Inst Corp Semiconductor Div Mountain View Cal Minnesota Rubber Co Minneapolis Minn Birtcher Corp The Monterey Park Cal Sylvania Elect Prod Inc Mt Vie...

Страница 54: ...shen Stamping Tool Co Goshen Ind 73899 JFD Electronics Corp Brooklyn N Y 73905 Jennings Radio Mfg Corp San Jose Cal 73957 Groove Pin Corp Ridgcfield N J 74276 Signalite Inc Neptune N J 74455 J H Winns and Sons Winchester Mass 74861 Industrial Condenser Corp Chicago III 74868 R F Products Division of Amphcnol Borg Electronic Corp Danbury Conn 74970 E F Johnson Co Waseca Minn 75042 International Res...

Страница 55: ...ter Pressed Aluminum Corp Worcester Mass 94696 Magnecraft Electric Co Chicago Hi 95023 George A Philbrick Researchers Inc Boston Mass 95146 Alco Elect Mfg Co Lawrence Mass 95236 Allies Products Corp Dlanla Fla 95238 Continental Connector Corp Woodside N Y 95263 Leecraft Mfg Co Inc Long Island N Y 95265 National Coil Co Sheridan Wyo 95275 Vitramon Inc Bridgeport Conn 95348 Gordos Corp Bloomficld N ...

Страница 56: ...STAN Mushko 4 Company lid Oosman Cnambers Abdullah Haroon Road Karachi Id 5H027 512927 lelei KR894 Cable C00PERAI0R Uriel Musrtko Company lid 38B Satellite Town Rawalpindi Id 41924 Carjie FEMUS Rawalpindi PHILIPPINES The Online Advanced Syslems Corporation neapil Bldg 1 1 IB Floor AyaU Ave Makali RUel Id 86 40 81 exl 223 263 tdex 3774 ONLINE HHOOESIA field Technical S es 45 Kdvm Road North P Box 3...

Страница 57: ...Seville IB 64 44 54 58 Hewlett Packard EspaAtua S A Ecuiiaa Aibia II 7 B f Bilbao Id 3 83 0673 8 06 Calculaiors Only Hewlett Pacxard Esparloia S A Gran Via Fernando El Caldkco 67 I Valencia e Td 326 67 28326 85 55 SWEDEN Hewlett Packard Sverige AS Enaghelsvagen 3 Fack S 161 20 Bromma 0 Td 081 730 OS 50 Cable MEASUREMENTS Stockholm idex I07 i Hewlett Packard Svenge AB frotalisgalan 30 S 421 32 Vaal...

Страница 58: ...3725 13 All 15 CHANGE 1 Figure 6 3 and Replaceable Parts Substitute Figure C l for Figure 6 3 and replace any component according to Table C l Section IV Theory of Operation Serials prefixed 322 401 528 and 714 with chopper amplifier board 03400 66504 does not have an emitter follower stage prior to the demodulator In Section IV delete any reference to emitter follower Q604 and change reference de...

Страница 59: ...5 occur on meter change C602 to 10 juF described in Table 7 1 Instruments with serial number between 714 06226 and 714 07525 have a 4700ft resistor for R606 If R606 fails or if meter jitter occurs replace R606 with 3300ft resistor described in Table 7 1 NOTE 1 NOTE CHANGE 7 Some instruments with serial number between 714 06526 and 714 06925 in clusive have a different second atten uator assembly t...

Страница 60: ...9 FULL SCALE ADJ AMPLIFIER OUTPUT FROM VIDEO AMPLIFIER A4 31OOA 0 O0B8C NOTES PRIMARY SIGNAL PATH AC FEEDBACK PATH DC FEEDBACK PATH COPYRIGHT 1965 BY HEWLETT PACKARD COMPANY 2 OPTIMUM VALUE SELECTED AT FACTORY AVERAGE VALUE SHOWN 3 r CABINET GROUND 4 j7 PRINTED CIRCUIT GROUND 5 UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS 6 f DENOTES REAR PANEL LOCATION 01768 1 Figure C...

Страница 61: ...w C607 0150 0093 0 01 iF 20 80 100 vdcw C608 0180 0022 3 9 uF 35 vdcw C609 0180 0039 100 i F 12 vdcw C610 0180 0119 1 x 10 100 25 vdcw C611 0150 0093 0 01 fiF 20 80 100 vdcw C612 0180 0156 880 mF 10 100 1 vdcw C613 0180 0039 100 fiF 12 vdcw CR601 1902 0046 Diode breakdown 7 15 V 10 CR602 1910 0016 Diode germanium 60 piv CR603 and 1901 0025 Diode silicon 100 piv CR604 Q601 thru 1853 0036 Transistor...

Страница 62: ...gure 6 4 Power Supply Schematic and Table 7 1 Replaceable Parts Change value and Part No of following components R701 to 56 kfi hp Part No 0687 5631 R702 to 56 kO hp Part No 0687 5631 R709 to 330 J2 hp Part No 0683 3315 C703 to 0 022 iiF hp Part No 0170 0024 CHANGE 10 Page 6 9 6 10 and Table 7 1 Change following components R718 to 75kJ2 hp Part No 0683 7535 R730 to 11 kJ2 hp Part No 0683 1135 R731...

Страница 63: ...6 47 k from the base of Q704 to A7 Pin 3 Page 7 5 Delete CR720 Change Q701 702 to 1850 0062 Change Q703 704 to 1850 0040 Change Q705 to 1851 0017 2N1304 Page 7 7 Add R706 0683 4735 R fxd comp 47 k 5 1 4 W Page 7 8 Change R731 to 0757 0290 R fxd met flm 6 19 k 1 1 8 W CHANGE 15 Page 7 2 The hp Part No s listed on page 7 2 of this man ual are for brown instruments The part numbers for blue instrumen...

Страница 64: ...HEWLETT MPACKARD 03400 90008 PRINTED IN U S A ...

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