Page 1: ...rt your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future w...
Page 2: ...DC POWER SUPPLY HVB SERIES MODEL 6516A SERIAL NUMBER PREFIX 70 Printed October 1967 dij Stock Number 06516 90001...
Page 3: ...Power Cable 2 2 5 42 Temperature Coefficient 5 9 2 20 Repackaging for Shipment 2 2 5 46 Output Stability 5 9 5 49 Current Limit 5 10 III OPERATING INSTRUCTIONS 3 1 5 51 Troubleshooting 5 10 3 1 Turn...
Page 4: ...ts 2 2 Rack Mounting One Unit 2 1 2 2 5 4 Test Setup Ripple and Noise Test Setup 3 1 Front Panel Controls and Indicators 4 1 Overall Block Diagram 3 1 4 1 5 5 5 6 High Voltage Protection Network Noise...
Page 5: ...LINE t1 0 1 0 r VOLTAGE Figure 1 1 DC Power Supply Model 6516A i V...
Page 6: ...ection opposite to the output current must be provided by preloading the power supply Paragraph 3 15 The power supply cannot accept reverse current without damage 1 7 COOLING 1 8 Convection cooling is...
Page 7: ...e of a significant design change The number 1 2 designates the year and the letter A through L designates the month January through December respectively The third part is the power supply serial numb...
Page 8: ...or 16mV of the nominal output voltage following a full load change in output current The nominal output Specifications 1 3 voltage is defined as the mean between the no load and full load voltage OVER...
Page 9: ...K 2 6 The instrument should be checked against its electrical specifications Section V includes an in cabinet performance check to verify proper instrument operation 2 7 INSTALLATION DATA 2 8 The inst...
Page 10: ...n operated from a 115 volt 60 Hz power source at full load is Model 6110A 60 Watts Model 6516A 40 Watts 2 2 2 17 POWER CABLE 2 18 To protect operating personnel the National Electrical Manufacturers A...
Page 11: ...ty is void if the chassis is ungrounded during operation NOTE This supply emits a ticking sound which is characteristic of normal operation It in no way indicates that the power sup ply is malfunction...
Page 12: ...ration Any capacitance added exter nally will improve the pulse current capability but will decrease the safety provided by the cur 3 2 rent limiting circuit A high current pulse may damage load compo...
Page 13: ...OOV CURRENT PROTECTION LIMIT DIODE l CR32 l DRIVER AND _ VOLTAGE ERROR INPUT AMPLIFIER CIRCUIT Tl HIGH VOLTAGE DOUBLER O 32KV t A INPUT I I HIGH CONTROL VOLTAGE WINDING CONTROL CIRCUIT Figure 4 1 Over...
Page 14: ...proper level and coupled to the piggy back sup 4 2 ply This supply converts the ac input to raw de which is fed to the positive terminal via the series regulator and current sampling resistor network...
Page 15: ...4 10 The voltage input circuit amplifier Ql6 de tects an error voltage that is proportional to the difference between the voltage across its program ming resistors thumbwheel switch assembly and the d...
Page 16: ...put to the input of Q16 by network R20 and C20 This feedback provides high frequency roll off in the loop gain to stabilize the feedback loop 4 4 4 20 DRIVER AMPLIFIER 4 21 The driver amplifier circui...
Page 17: ...el at which VR3 will fire and there fore controls the maximum output voltage of the high voltage doubler 4 5 4 30 REFERENCE REGULATOR 4 31 This circuit supplies regulated de bias volt ages to the volt...
Page 18: ...ce This reduces the number of internal points with dangerous potentials 5 1 5 5 With the positive terminal connected to chassis only the points illustrated in Figure 5 1 are at a high potential with r...
Page 19: ...DANGER HighVoltage __ Ii f i k 1 1 J I iW Figure 5 1 High Voltage and Troubleshooting Location Diagram 5 2 C18 Under Capacitor...
Page 20: ...Measure impedance Measure output current and DC voltages Measure impedance Measure impedance Measure impedance Measure temperature stability M easure programming coefficients Measure ripple and noise...
Page 21: ...the power supply as illustrated in Figure 5 3 Load resistance is SOOK ohms 18 watts b Turn the front panel VOLTAGE thumbwheel controls until the front panel voltmeter indicates exactly 3000Vdc 5 4 T...
Page 22: ...the output of a power sup ply is more critical than the low frequency ripple and noise measurement technique therefore the former is discussed separately in Paragraph 5 32 5 5 5 25 Ripple and Noise M...
Page 23: ...oscilloscope case be connected to ground e g if both are rack mounted it may be necessary to use a differential scope with floating input as shown in Figure 5 4C If desired two single conductor shield...
Page 24: ...4C 5 7 5 35 TRANSIENT RECOVERY TIME Definition The time X for output voltage recovery to within Y mil livolts of the nominal output volt age following a Z amp step change in load current where Y is sp...
Page 25: ...ch as possible of the rise time of the transient is displayed j Starting from the major graticule division representative of time zero count to the right 100 sec and vertically 16mV Recovery should be...
Page 26: ...nt panel voltmeter indicates 3000 Vdc c Insert the power supply into the temper ature controlled oven diffeiential voltmeter remains outside oven Set the temperature to 30 C and allow 30 minutes warm...
Page 27: ...schemat ic and printed wiring boards 5 5 4 Once the defective component has been lo cated by means of visual inspection or trouble analysis correct it and re conduct the performance test If a componen...
Page 28: ...hanges of 10 30 mV High Ripple Poor Transient Recov ery Time Output Voltage In accuracy VRl defective voltage thumbwheel switches noisy lV thumbwheel control R200 noisy a Check operating set up for gr...
Page 29: ...igure 5 1 Since this places a reverse voltage across capacitors C27 and C28 a jumper must be connected from the lead of Cl8 to the lead of C28 as illustrated in Figure 5 1 The low voltage loop should...
Page 30: ...M 10 ms CM The waveform above in dicates a normal condi tion Note that the lowest peak does not reach zero volts I A V I I I 1 I I __ __ __ J ___ __ J NOTE OV T P T00 20V CM IOmS CM The waveform above...
Page 31: ...a Approximately 160V b Approximately 0V a Output remains high b Output decreases to ov a Output remains high b Output decreases to ov a More than 100 ri 1 b 100n 1 Probable Cause a Low Voltage Offset...
Page 32: ...C ov _N lTF l 1 J I J IV V V t 1 t t t 7 H roG 20V CM IOmS CM The waveform above is indicative of high out put voltage Note that the peaks reach and are clipped at zero volts Extremely high output vo...
Page 33: ...t 1 Apply heat sparingly to lead of component to be replaced If lead of com1Jonent passes through an eyelet in the circuit board apply heat on com ponent side of board If lead of com ponent does not p...
Page 34: ...tial voltmeter indicates 30 00Vdc 5 17 e Note the setting of the decade box and connect the next highest value resistor in the R52 position on the circuit board This resistor should be a 1 l 4W Metal...
Page 35: ...otocell jack relay inductor meter plug etc X socket XF fuseholder XDS lampholder Z network 6 1 ABBREVIATIONS a C cer coef com comp conn crt dep elect amperes carbon ceramic coefficient common composit...
Page 36: ...s Division Phoenix Arizona 05277 Westinghouse Electric Corp Semi Conductor Dept Youngwood Pa 05347 Ultronix Inc Grand Junction Colo 06486 North American Electronics Inc Lynn Mass 06540 Amathom Electro...
Page 37: ...o Bussmann Mfg Div of McGraw Edison Co CTS Corporation I T T Cannon Electric Inc St Louis Mo Elkhart Ind Los Angeles Calif 71590 Centralab Div of Globe Union Inc Milwaukee Wis 71700 The Cornish Wire C...
Page 38: ...onents Div Plainfield N J 83877 Yardeny Laboratories Inc New York N Y 84171 Arco Electronics Inc Great Neck N Y 84411 TRW Capacitor Div Ogallala Neb CODE NO MANUFACTURER ADDRESS 86684 Radio Corp of Am...
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Page 41: ...9100 1812 OPTION 18 13 Inductor 1 HI AB 09182 9100 2149 Tl Power Transformer 1 HIAB 09182 9100 2138 T2 Bias Transformer 1 HI AB 09182 9100 2139 OPTIONS 05 AND 18 13 Inductor 1 HI AB 09182 9100 2140 Tl...
Page 42: ...6 TO 5V CM IOMS CM l05VAC INPUT OV OMA OUTPUT II5VAC INPUT 1500V 6MA OUTPUT TP 36 TO 5V CM IOMS CM TP 36 TO 20V CM IOMS CM l I05VAC INPUT 500V 2MA OUTPUT 115VAC INPUT OV OMA OUTPUT ov SCR FIRING IOV 2...
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