HP-890A-Manual 电路图.pdf

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1、I . : HP Archive . . This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! . . On-line curator: Tony Gerbic RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS PRELIMINARY CHECKOUT 1. Controls and Terminals 2. Testing PUTTING THE SUPPLY I

2、NTO SERVICE 1. Mode of Operation 2. Special Considerations INDEX MEASURING THE PERFORMANCE OF THE SUPPLY MAINTENANCE CIRCUIT DESCRIPTION SERVICE 1 . Procedure 2. Trouble Shooting 3. Table I. 4. Table 11. 5 . Alignment Procedure PARTS LIST DRAWINGS Fig. 1. Fig. 2. Fig. 3. Fig. 4. Fig. 5 . Fig. 6. Fig

3、. 8 . Fig. 9 . Rear Terminal Connections Normal Operation Remote Programming, Local Sensing Remote Sensing, Local Programming Remote Sensing, Remote Programming Test Data Block Diagram Schema tic Page 2 4 4 5 7 8 8 9 11 11 12 14 15 17 RadioFans.CN 收音机爱 好者资料库 I I I I 1 I i I 1 I I i i I i i I I I I i

4、 I I j I J i I I I SPECIFICATIONS Input: 105-125VAC, single phase 60 cps, 3.9A and 255W at 117VAC input and full output . Output: 0-320 volts, 0-0.6 amperes Load Regulation: Less than 0 . 007% or 20 mv change (whichever is greater) for a 0.6 ampere load change. Line Regulation: Less than 0.007% or 2

5、0 mv change (whichever is greater) for 105 to 125 volt line change. Ripple and Noise: Less than 2 millivolts rms. Plus or minus output terminal must be grounded through a low impedance path. Maximum Operating Temperature: 5OoC Temperature Coefficient: Output voltage change per degree Centigrade is l

6、ess than 0.03% plus 1.5 millivolts. 3. Stability: The total drift for 8 hours (after 30 minutes warmup) at a constant ambient temperature is less than 0 . 1% plus 5 millivolts. Internal Impedance: Less than 0.04 ohms from DC to 1 Kc. Less than 0.2 ohms from 1 K c to 10 Kc. Less than 1.0 ohms from 10

7、 Kc to 1 Mc. Less than 10 ohms from 1 Mc to 10 Mc. Transient Recovery Time: Less than 100psec is required for output voltage recovery to within 20 millivolts of the nominal output voltage following a 0 . 6 ampere change in output current. For this measurement, the nominal output voltage is defined a

8、s the mean between the no load and full load voltages. Overload Protection: An all-electronic, continuously acting current limit circuit protects the power supply for all overloads, including a short circuit placed directly across the output terminals. However, a fuse is placed in the output circuit

9、 to protect against an instantaneous short circuit at high output voltages. The unit may be safely turned on into a short circuit. Turn-on-Turn-off Transient: On output voltages above 10 volts, there will be no turn-on or turn-off overshoot and will be less than 0 . 2 of a volt at 10 volts or less o

10、utput. 2) Controls: A lO-turn potentiometer (with concentric knoblock) on the front panel makes possible continuous adjustment of the output voltage over the entire range from 0 to 320 volts. Meters: A 0-32OV voltmeter and 0-0.8A ammeter are provided. Output Terminals: An output terminal strip is lo

11、cated on the rear of the chassis. All power supply terminals are isolated from the chassis and either the positive or negative terminal may be connected to the chassis through a separate ground terminal located adjacent to the output terminals . Error Sensing Remote Programming and Remote Programmin

12、g . I ALIGNMENT PROCEDURE I 89 O A Step 1. High-Voltage Test I See Preliminary of Service Section and Figure 6A. Step 2 Preturn-on Adjustments A. Set voltmeter and ammeter to zero. B. Set programming control full clockwise. D. Check for proper fuses (DC 1 amp, AC 5 amp). E. Wire for normal operation

13、, see Figure 1. F. I C, Set line switch to off . I Disconnect main power rectifier from T3 (lugs 11 & 12) . 1 Step 3. Turn on Unit I Output voltage should rise to about 20 volts. Step 4. Connect A1 to +Output Output voltage should fall to zero. If 3 or 4.are not correct, check voltages 1 through 7 i

14、n Table I and check Q1, 2, 5, 7, 8 , 9 . i I 1 Step 5. Connect a 0-1 .O amp ammeter directly across the output terminals. Adjust P4 for . 8 ampere on external meter. Adjust P7 for 08 ampere on internal meter. Remove meter. I Step 6. Turn programming control down until supply goes into regulation-abo

15、ut 3/4 I turn from full counterclockwise. Rock control up and down. Connect an I , control circuit . oscilloscope between minus bus and test point 30. Waveform should shift left and right. See Figure 6B. Improper waveform indicates trouble in SCR Step 7. Turn control about one turn up from full coun

16、terclockwise . Connect scope between the cathode and gate of each SCR and observe waveforms as in Figure 6C. A very low on high pulse voltage usually indicates a defective SCR. I I 1 Step 80 Adjust output voltage to about 5 volts. Load supply to .65 amperes ard observe output voltage with scope. The

17、 peak-to-peak ripple should be less I than 300yv. Step 9. Turn off unit and reconnect the main rectifier bridge to lugs 11 and 12 on T3 . Set programming control to one turn from full clockwise. Turn on unit. Output voltage should rise to about 300 volts. Observe output voltage on scope, Ripple shou

18、ld not exceed 300yv peak-to-peak. I Step 10. Increase load on supply slowly. Output current meter should rise to 0.8 ampere then remain constant as the load resistance is decreased. P4 can be used to adjust the current limit. Step 11. Load supply from nearly zero current to .65 amperes at any voltag

19、e above 20 volts output. Measure the voltage between 28 and 27 with a voltmeter. It should drop from about 15 volts to about 1.3 volts as the current is in- creased from zero to about 150 ma and then remain nearly constant as the load current is further increased . Step 12, Set output voltage to abo

20、ut 320 volts. Vary line from 105 to 125. Load supply to .65 amps. Observe output of supply at its sensing terminals with digital voltmeter or potentiometric differential voltmeter such as a John Fluke Model 801H. Adjust P2 until output voltage shifts less than 2 mv as an immediate shift of line volt

21、age. Step 13. Apply and remove the .65 amp load. Observe output as in step 12. Adjust P1 until output voltage change is less than 2 mv. Step 14. Alternately apply and disconnect the -65 amp load (non-inductive) with a Mercury wetted relay at any frequency up to 100 cps (Relay-Clare type HGP 1002). O

22、bserve output voltage on scope at the sensing terminals. Adjust P3 until trace is similar to Figure 6D. Step 15. Turn line voltage to 125 volts. Remove load from supply, Pull QS from its socket. Observe output voltage on a multimeter. Adjust P5 for 400 volts output . Step 16. Turn off supply, replac

23、e 05, disconnect +S from A2, connect a 96K +1/2% 5 watt resistor between +S and Al. Turn on unit. Output voltage should rise to 320 volts +1/2%. If unit is outside of this value then turn off unit and remove R2 on the stand-off terminals and replace it with a resistance decade box. Turn on unit and

24、adjust the decade box for exactly 320 volts output . Substitute a fixed resistor for the decade box and recheck . DO not use a value less than 47K unless it has a temperature coefficient less than 100 ppm/OC. Adjust P6 until output voltmeter reads 320 volts. Step 17. Short output of the supply with

25、a short clip lead, Be sure to connect to the load terminals and not the sensing terminals , Turn off supply. Wait one minute then replace the DC fuse (1 amp 3AG). Turn on the unit. It should return to the same voltage and no change should have occurred in the line or load regulation. If a change has

26、 occurred check all the transistors and D16 and R66. Step 18. Glyptol all pots, put on covers, wire unit for proper mode of operation, and the supply is ready for service. 1 REDRAVN8-16-6J R UN-2 2 I m a 3 0 0 m u) ? 0 13 m 3 3 D 3 a” 4 v) C 5 i I m z v, -I X I C 0 0 Z - i $ Z C b r REDRAWN 8-iG-61

27、hUN 2 i E G R ALVN 8- 16-61 1 kUN 2 2 Q I + I I A I I I I 1 1 I I I 1 I I I 1 I I I I AkD RAWN 8- 16-61 RUN 2 a 0 I Po 7 I w $ I 1 I I 1 1 1 1 i 1 1 I I 1 1 1 I t I 9 9 L I t I I i b + I i I I 1 1 I I I 1 1 I I I 1 1 I 1 SECTION VI REPLACEABLE PARTS 6-1 INTRODUCTION I 6-2 This section contains infor

28、mation for ordering replacement parts. 6-3 Table 6-1 lists parts in the alpha-numerical order of the circuit designators and 1 provides the following information: A. B. C . Manufacturers part number. D. Manufacturer. E. F. The H-P Part Number. G. Description (See list of abbreviations below). Total

29、quantity used in the instrument. The Manufacturers code number as listed in the Federal Supply Code for Manufacturers H4- 1. The recommended spare parts quantity for complete maintenance during one year of isolated service. (Column A). 1 6-4 ORDERING INFORMATION 6-5 100 Locust Avenue, Berkeley Heigh

30、ts, New Jersey. To order replacement parts, address order or inquiry either to your authorized 1 Harrison Laboratories sales representative or to Customer Service , Harrison Laboratories , I I 6-6 Specify the following information for each part: A. B . Circuit reference designator. C. Description. M

31、odel and complete serial number of instrument. 6-7 To order a part not listed in Table 6-1 , give a complete description of the part and include its function and location. assembly motor capacitor diode device signaling (lamp) misc. electronic part fuse jack Reference Designators K= L= M= P= Q= R= R

32、T = s= relay T = transformer inductor v = vacuum tube, neon Plug X = socket trans is tor XF = fuseholder re s is tor xDS = lampholder thermistor z = network switch meter bulb 3 photocell J etC 6- 1 a cer coef com comp conn crt deP elect encap f fxd GE grd h Hg impg ins 1 in log m M ma P mfr mtg my N

33、C Ne NO nsr C = amperes = carbon = ceramic = coefficient = common = composition = connection = cathode-ray tube = deposited = electrolytic = encapsulated = farads = fixed = germanium = ground (ed) = henries = mercury = impregnated = insulation (ed) = linear taper = logarithmic taper = milli = 10-3 =

34、 megohms = milliamperes = micro = 10-6 = manufacturer = mounting = mylar = normally closed = neon = normally open = not separately replaceable ABBREVIATIONS AB B Beede Buss Carling CTS Elco GE GI HH Hoff All en-Bradley Bend ix Corpora tion Beede Elec. Instr. Co. ,Inc. Bussman Mfg. Company Carling El

35、ectric Company CTS Corporation Elco Corporation General Electric Company General Instrument Company H ardwi ck- Hi ndl e Company Hoffman Electric Company K obd P P C PP PPm POS PQlY Pot P W rect rot rms sect Si E il sl td T i 0 tog to1 trim twt var W Pf s-b w/ w/o ww cmo = kilo = 1000 = order by des

36、cription = peak = printed circuit board = picofarads = 10-12 farads = peak- to- peak = parts per million = position (s) = polystyrene = potentiometer = peak reverse voltage = rectifier = rotary = root-mean- square = section (s) = silicon = silver = slide = time delay = titanium dioxide = toggle = to

37、lerance = trimmer = traveling wave tube = variable = with = watts = wirewound = without = cabinet mount only = slow-blow MANUFACTURERS Kulka Mot RCA Reliance Mica Semcor Sloan S Prague Superior s ylv TI WL Kulka Electric Motorola Inc. Radio Corporation of America Reliance Mica Corporation Semcor Cor

38、poration Sloan Company S Prague Electric Superior Electric S ylva nia Electric Texas Instruments Ward Leonard Electric 1 i I I 1 I I I 1 1 I I I 1 1 I I ! 6-2 REVISION: MODEL 890A Note the following changes in the Specifications, Page 2. Load Regulation: Change 20 mv or 0,007% to 10 mv or 0.007%. Li

39、ne Regulation: Change 20 mv or 0.007% to 10 mv or 0.007%. Ripple and Noise: Charge 2.0 to 1.0. Note the following changes in the Parts List, Page 18 and Schematic, Figure 9. Change: R41 470K 1 watt AB to 470K 1/2 watt AB, Change: C28 and C29 0.1pf 400 volt 191P to 0.lpf 400 volt 160P. Change: C26 an

40、d C27 1050t.t 400 volt D38713 to 1 0 0 0 400 volt 3 6D10 2F400CE 6B . MANUAL CHANGES SERIAL MAKE Prefix Number CHANGES ALL 0931 - 1110 Errata 4G 1 4G 1111 - up 1,2 DC POWER SUPPLY Model 890A Manual Serial Number Prefix 4G I SERIAL MAKE I Prefix Number - CHANGES Make all corrections in the manual acc

41、ording to errata below, then check the following table for your power supply serial number and enter any listed change(s) in the manual. ERRATA: Change the following Specifications on Page 2: Load Regulation: Change 20 mV or 0.007% to 10 mV or 0.007%. Line Regulation: Change 20 mV or 0.007% to 10 mV

42、 or 0.007%. Ripple and Noise: Change 2 mV rms to 1 mV rms. CHANGE 1: In the replaceable parts table make the following changes: C26,C27: Should be 1000pf, 400V, 36D102F400CE6B. C28,C29: Should be O.lpf, 400V, 191P. R41: Should be 470K, 1/2 W, AB. CHANGE 2: In the replaceable parts table make the fol

43、lowing corrections: C25: Change to lO,OOOpf, 75V, D39062. D10: Add hp part No. 1901-0389. D17,24,25,26: Change part No. to MR1032B. D19: Change part No. to MR 1034B. D47-50: Add hp part No. 1901-0388. PARTS LIST 890A Circuit Symbol Description *Spares Transformer H2 9lA Cycle H298 Cycle H286A Cycle

44、I I II Potentiometer lOOK Helipot Series A 10K CTS Series 70 lOOK CTS Series 70 250 CTS Type 110 1K CTS Type 110 II I1 11 5K CTS Type 110 II II Capacitor 1050pf 400V Sp. 8600pf 40V Sp. 490pf 65V Sp. 200pf 15v sp. 20pf 50V Sp. 5pf 50V Sp. 1.Opf 400V Sp. LO 200v sp. ,082pf lOOV Sp. ,02pf 600V Erie #Ed

45、.-.02 .015pf lOOOV Sp#366263A 510 ppf Mica lpf 50V Sp. .01 pf 600V Erie Ed,-.Ol .Zpf 400V Sp. II 11 II II I 1 I1 I t II II 11 I 1 11 It II SCR 2N1774 G.E. Rectifier 1N3256 Diode lllSl Diode 1N484A 1N3253 1N91 I 1N2163 I 1N719 II I 1N1563 Mo. I iIRE19lA D. Strap Transls tor 2 N1471 I1 2N1378 I 1N1566

46、A MO, $1 N272 (2N1304) II B1217 (2N1137) II 2N1377 (17 1 1 1 1 1 1 1 1 3 1 2 1 1 2 1 4 1 2 1 1 3 3 1 5 2 3 4 13 16 1 3 1 1 4 1 1 4 1 1 1 3 Circuit Symbol Description Spares ! R1 R2 R4 R 3 18,318 32 p 48 R5,65 R6 t 11 R7 R8 p 14 R9,46 R10 R12 t 67 R13,74 R15r 35,57 R16138t42 a 43 R17 8 33870 R19 R20,

47、23 R21 R2 2 R2 7 R30 R34 R36 R41 R44 R45 R47 R58 R59 R60 R64 R66 R68 R71 R72 R7 3 R7 5 R7 6 R7 7 R7 8 F1 F2 s1 R25p26 R28j29 R37,39, 408 69 Resistor 3.6K 3W Sp. II Shunt 1/2watt AB I1 5.1K 1/2watt AB I 1 75 1/2watt AB II 1.5K 1/2watt AB II 12K 1/2watt AB II 820 1/2watt AB - I I 680 1/2watt AB II 7.5

48、K 1/2watt AB II 150 1/2watt AB II lOOK 1/2watt AB I1 8,2K 1/2watt AB I 1 51 1/2watt AB I1 2.7K 1/2watt AB 11 15K 1/2watt Sp. II 300 1/2watt AB I1 200 1/2watt AB II 2 5watt W.L. HH I1 2K lwatt AB I1 30K lOwatt WL. HH II 100 2watt AB I1 470K lwatt AB I1 820 lwatt AB II 1.6K 2watt AB II 270 lwatt AB II 3K lwatt AB It 10 1/2watt AB It 220K 2watt AB II 1.0 5watt WL. HH II 470 1/2watt AB II 10K 1/2watt AB II 270 1/2watt AB II 33K 1/2watt AB II 2K 3watt Sp. II