Benutzeranleitung / Produktwartung 6634B des Produzenten Agilent Technologies
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Service Manual A gilent Model 66332A Dy namic Measurement DC Source and A gilent Model 6632B, 6633B, 6634B Sy stem DC Pow er Supply For instruments with Serial Numbers: Agilent 66332A: US37470791 and .
2 Warranty Information CER TIFICA T ION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory.
3 Safety Summary The f ollowin g g eneral sa f et y p recautions must be obser ved durin g all p hases o f o p eration o f this instrument. Failure to com p l y with these p recautions or with s p eci f ic warnin g s else where in this manual v iolates sa f et y standards o f desi g n, manu f acture, and intended use o f the instrument.
4 Safety Symbol Definitions Symbol Description Direct current Alternatin g current Both direct and alternating current Three-phase altern ating current Earth (grou nd) terminal Protective earth (groun.
5 Notice The information contain ed in this docum ent is subject to change w ithout notice. Agilent T echnologies makes n o warran ty of any kind with reg ard to this material, in cluding but not limited to, the im plied warranties of merch antability, and fitness f o r a particular purpose.
6 Table of Contents Warranty Inform ation 2 Safety Sum mary 3 Notice 4 Printing History 5 Instrument Identifi catio n 5 Table of Cont ents 6 INTRODUCTION 9 Organization 9 Safety Considerations 9 Relat.
7 Power-on Self -test Failures 37 CV/CC Status Annunci ator s Tr oub leshoo ting 38 Bias and Ref erence Supplies 38 J307 Voltage Meas urement s 39 Manual Fa n Spee d Contr ol 40 Disab ling Pr ote ctio.
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9 1 Introduction Organization This manual con tains information f or tro ubleshooting and repairing to the com ponent level the Ag ilent Mode l 66332A Dy nam ic Measurem ent DC Source an d the Agi lent Model 6632B, 6633B, 6634B Sy stem DC Power Supplies.
1 - Intr oduction 10 Rev isions Manual Revisions This manual w as written f o r dc power supplies that have the sam e manuf acturing dates (the first four digits) as those listed on the title page and w hose unique identification n umber (the last four digits) are equal to or high er than those listed in the title page.
11 2 Verification and Performance Tests Introduction This document contains test p rocedures to verify that th e dc p ower supply is op erating norm ally and is w ithin published s pecifications.
2 - Verif ication and Perf ormance Test s 12 Resistor (substitute for electronic load if load is too noisy for CC P ARD test) 1 ohm , 50 W 3 ohm , 100 W (Agi lent 66332A/ 6632B) 24 ohm , 100 W (Agi le.
Verification and Per form ance Tests - 2 13 Electronic Load Many of the test procedures requ ire the use of a v ariable load capable of dissipating th e required power. If a variable resistor is used, switches should b e used to either; co nnect, d isconnec t, or short the lo ad resisto r.
2 - Verif ication and Perf ormance Test s 14 Table 2-2. Progra mming Ratings Model Voltage Rating Full Scale Rating Current Rating Full Scale Rating Agilent 66332A/6632B Ag ilent 6633B Ag ilent 6634B 20 V 50 V 100 V 20.020 V 50.045 V 100.1 V 5 A 2 A 1 A 5.
Verification and Per form ance Tests - 2 15 e. Open the load and ag ain record the DVM voltage reading . T he differen ce between the DVM readin gs in steps (d) and (e) is the load ef fect voltage, and sh ould not exceed the valu e listed in the perform ance test record chart for the appropri ate model u nder CV LOA D EFFECT.
2 - Verif ication and Perf ormance Test s 16 Transient Recove ry Time This test measures the tim e for the output voltage to recover to w ithin the specified value follow ing a 50% change in the load curren t. tttt t v Loading Transient Unloading Transient v t Figure 2-2.
Verification and Per form ance Tests - 2 17 e. Divide the v oltage drop (DVM reading) across the cu rrent monitorin g resistor by its resistance to conv ert to amps and record this value (Iou t). Also, record the curren t reading that appears on th e front panel display .
2 - Verif ication and Perf ormance Test s 18 c. Set up voltmeter to take m easurements in the statistical mode as follows: Press Shift key, f0, Shif t key, N Press ^ (up arrow) until MA T H function is selected, then press >. Press ^ (up arrow until STAT function is selected then pr ess (ENTER).
Verification and Per form ance Tests - 2 19 CC Noise (PA RD) Periodic and random deviations (PAR D) in the output com bine to produce a residual ac cu rrent, as w ell, as an ac voltage su perimposed on th e dc output.
2 - Verif ication and Perf ormance Test s 20 Performance Test Record Forms Model Agilen t 66332A OR Agilen t6632B Report No _______________ Date __________________ Test Description Minimum Specs.
Verification and Per form ance Tests - 2 21 Model Agilen t 6633B Rep ort No _______________ Date __________________ Test Description Minimum Specs. Results* Ma ximum Specs.
2 - Verif ication and Perf ormance Test s 22 Model Agilen t 6634B Rep ort No _______________ Date __________________ Test Description Minimum Specs. Results* Ma ximum Specs.
23 3 Troubleshooting Introduction WA RNING: SHOCK HA ZA RD. Most of the troubles hooting procedures g iven in this chapter are performed w ith pow er applied and protective cov ers remov ed. Such m aintenan ce should be perform ed only by s ervice trained personnel w ho are aw are of the hazards (f or example, f ire and electrical shock).
3 - Tr oubleshooting 24 Test Equipment Required Table 3-1 list s the test equ ipment required to troublesh oot the pow er supply . Recomm ended models are listed.
Troubleshoot ing - 3 25 Turn on unit and observe the dis p la y . Unit should dis p la y all of the se g ments and annunciators, the address and then after self test dis p la y either an erro r messa g e or g o to the meterin g mode.
3 - Tr oubleshooting 26 Continued from sheet 1 Pro g ram Volta g e and Current full scale, enable out p ut with no load. Measure Volta g e at out p ut terminals.
Troubleshoot ing - 3 27 Figure 3-1 She et 3. M ain Flowchart (continued).
3 - Tr oubleshooting 28 Connect a DC cou p led sco p e set to 1mS/20V/ div across the out p ut and turn on the su pp l y while observin g the sco p e for a momentar y p ulse g reater than the su pp l .
Troubleshoot ing - 3 29 Continued from sheet 4 A 1U306B-2, OV_Detect*, Hi gh? No U306B-7 < pin 8? Yes Check U306B, A2 Check R349, R351, R356 Yes No A 1R438, OV_SCR*, +0.
3 - Tr oubleshooting 30 Pro g ram out p ut on, volta g e and current full scale then check out p ut volta g e Troubleshoot Fuse divider and am p lifie r circuit ( R393/394, U305 ) Disable the p rotect.
Troubleshoot ing - 3 31 Program full scal e voltage and current and enable output. Measure output voltage wit h an external volt meter. Display zero V but output OK? Check W7 (Vmon) and A 2, Inte rfac.
3 - Tr oubleshooting 32 Continued from sheet 7 Q302 base -5V ? Check C330, R333, R346, and Q302 No Q307 collector to emitte r 4V? Check Q302, Q307, R324 and R326 No Q303 base >1.
Troubleshoot ing - 3 33 Continued from sheet 7 CV _ Pro g @ R401 -4.7V ? Check W7, A2 Interface Board No VMon, U315B-7 ~0V ? Yes Check Volta g e Monito r A m p lifier, U315B, circuit No Check Volta g .
3 - Tr oubleshooting 34 Continued from sheet 2 CC _ Pro g , R360, -4.8V ? Check A2 Interface Board No Imon _ H, U309A-6 ~+3.5V ? Dro p across R473 ~0.25V ? No Check Hi g h Ran g e Current Monito r A m p lifie r Yes Check Positive Curr ent Control Circuit Yes Yes Check R473 No Figure 3-1 Sheet 10.
Troubleshoot ing - 3 35 Pro g ram the out p ut volta g e and current to the full scale value and the OV to 1/2. OV _p ro g ~+2V @ R350 ? U306B-8 ~+2V ? A 2 Interface Board o r cable W7 defective Check.
3 - Tr oubleshooting 36 Disable the OV ca p abilit y b y shortin g R351. After the p rotection is disabled, p ro g ram the out p ut volta g e to zero, current to full scale and Out p ut ON. If the unit is in "Protect" mode, Press Protect Clear.
Troubleshoot ing - 3 37 Specific Troubleshooting Procedures Power-on Self-test Failures The power-on self- test seq uence tests m ost o f the digital and DA C circuits. If the supply fails self -test, the display "ERR" annuncia tor will come on.
3 - Tr oubleshooting 38 CV/CC Status A nnunciators Troubleshooting The CV/CC annunc iato rs ar e pa rtic ular ly helpful when tro uble shoo ting a uni t with no outp ut. I f the unit ha s no outp ut volt age o r curr ent a nd one of the a nnunciat ors i s on the n the pr ob lem is in the c ontr ol ci rcuit assoc iate d with that a nnunciato r.
Troubleshoot ing - 3 39 J307 Voltage Measurements J307 connects th e A1 Main Board As sembly to the A2 Interface A ssembly . Table 3-4 provides a quick m ethod of determinin g if the voltages between these assemblies are with in the normal rang e.
3 - Tr oubleshooting 40 Manual Fan Speed Control Under som e circumstances such as testing acoustical devices w here the fan noise w ould interfere w ith the test, it w o uld be advan tageous to reduce the f an speed.
Troubleshoot ing - 3 41 Post-repair Calibration Calibration is r equired annually and whenever certain components are replaced. If components in any of the circuits listed below are replaced, the supply must be re- calibrated as described in Appendix B of the Us er's Guide.
3 - Tr oubleshooting 42 Initialization The dc pow er supply' s GPIB address and m odel num ber as w ell as other cons tants w hich are requ ired to program and calibrate the su pply are stored in a EEPROM on the A2 Interface board.
Troubleshoot ing - 3 43 Disassembly Procedures The follow ing parag raphs provide in structions on how to disassem ble various component s of the dc pow er supply . Once disa ssembled, th e componen ts can be reassem bled by perf orming the disassem bly in structions in reverse order.
3 - Tr oubleshooting 44 Cove r, Removal and Replacement a. Using a 2TP Pozi screwdriv er, unscrew the two screw s that hold th e carrying straps to the power su pply, and then rem ove the tw o screw s from the opposite side of the case. b. To remove the cov er, first spread the bottom rear of the cover slig htly and pu sh from th e front panel c.
Troubleshoot ing - 3 45 S1 Line Switch, Removal and Replacement a. First rem o ve the f ront panel assem b ly as described under “Front Panel A ssembly , Removal an d Replacement.” b. Release th e swit ch from t he front pane l by pressin g the lockin g tabs inw ard agains t the body of the sw itch and pushing the sw itch out of its opening.
3 - Tr oubleshooting 46 Line Voltage Wiring Figure 3-3 illustrates the prim ary w iring configuration of the pow er transformer for various ac lin e voltages.
47 4 Principles of Operatio n Introduction This section describes the different functional circu its used in the dc power supply m ode ls covered in this m anual. First, the I/O extern al signals that con nect to the Agilen t power supply are described.
4 - Principles of Operat ion 48 A 3 Front Panel Circuits As show n in Figure 4-1, the supply 's front panel assembly contains a circuit board, a keypad, a liquid crystal display (LCD), and a rotary control (RP G) for the output v oltage and current.
Principles of Operation - 4 49 Figure 4-1. A2/A 3 Block Diagram.
4 - Principles of Operat ion 50 The EEPROM (electrically erasable prog ramm able read-only m emory ) chip on the A2 in terface board stores a variety of d ata and configu r ation inform ation.
Principles of Operation - 4 51 Figure 4-2. A1 Block Diagram.
4 - Principles of Operat ion 52 Two cur rent shunt resisto rs monito r the o utput curre nt. RmHi (R 473) monitors the high current range ; RmL o (R403) monitor s the lo w current r ange. Shunt cla mps, co nnecte d in p aral lel ac ro ss RmLo, turn o n at ap pr oximatel y 25 mA to limit th e voltage dr op at high current s.
Principles of Operation - 4 53 The output is program med off . An overv o ltage condition is detected (OV_Detect* signal is receiv ed ). The line voltage falls below 90 volts (approximately ). Curren t readback is provided by three separate circu its.
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55 5 Replaceable Parts L ist Introduction This section lists the replaceable parts for Agilent Models 66332A, 6632B, 6633B, and 6634B power supplies. Refer to Figures 5- 1 for the location of mechanical parts with the reference designators MP. Refer to the board location diag rams in Chapter 6 for the location of electrical parts.
5 - Replaceable Parts 56 Table 5- 2. Chassis, M echanical Designator M odel Part Num ber Qty Description MP1 All 06612-00002 1 Cha ssis MP2 All 5063-3426 1 Front Pan el Ass y, Std u nit MP2 All 5063-3.
Replaceable Parts - 5 57 Figure 5-1. M echan ical Parts ldentif ication.
5 - Replaceable Parts 58 Table 5- 3. A 1 Cont rol Board PC Board A ssembly Designator Model Part Num ber Qty Des cription A1 66332A/6632B 5063-3431 1 Cont rol PCA, Test ed A1 6633B 06633-61023 1 Con trol PCA, Tes ted A1 6634B 06634-61023 1 Con trol PCA, Tes ted C300 66332A/6632B 0160-5422 1 C ap 0.
Replaceable Parts - 5 59 Designator Model Part Num ber Qty Des cription C349 66332A/6632B 0160-4791 1 Cap 10 pF 5% 100V C349 6633B/6634B 0160-4807 1 Cap 0.033 uF C350 All 0160-5422 1 Cap 0.047 uF 20% C351 All 0160-4791 1 Cap 10 pF 5% 100V C352 66332A/6632B 0160-4791 1 Cap 10 pF 5% 100V C352 6633B/6634B 0160-4807 1 Cap 0.
5 - Replaceable Parts 60 Designator Model Part Num ber Qty Des cription C403 66332A/6632B 0160-4791 1 Cap 10 pF 5% 100V C405 All 0160-3454 1 Cap 220 pF 1K V C411 6633B/6634B 0160-7277 1 Cap 2.2 uF C420 6633B/6634B 0160-6800 1 Cap 0.022 uF 20% C421 6633B/6634B 0160-6800 1 Cap 0.
Replaceable Parts - 5 61 Designator Model Part Num ber Qty Des cription D310 6633B/6634B 1901-1130 1 Diode D311 66332A/6632B 5060-3378 2 Rectifie r Assem bly 1205-0282 1 ref D311 Heat Sink 1901-1383 1.
5 - Replaceable Parts 62 Designator Model Part Num ber Qty Des cription Q300 All 5060-3245 1 Darling ton Fan D river Ass embly All 1854-0828 1 ref Q300 Trans istor,NPN SI All 1205-0282 1 ref Q300 Heat.
Replaceable Parts - 5 63 Designator Model Part Num ber Qty Des cription Q315 66332A/6632B 1854-1174 1 T ransis tor, NPN Q315 6633B/6634B 1854- 1362 1 T ransi stor, NPN Q316 All 1855-1016 1 Transist or.
5 - Replaceable Parts 64 Designator Model Part Num ber Qty Des cription R326 66332A/6632B 0757-0200 1 Res 5.62K 1% R326 6633B/6634B 0698-3159 1 Res 26.1K 1% R327 All 0757-0280 1 Res 1K 1% 0.125W R328 66332A/6632B 0683-0475 1 Res 20K 1% 0.125W R328 6633B/6634B 0757-0346 1 Res 10 1% R329 66332A/6632B 0757-0449 1 Res 4.
Replaceable Parts - 5 65 Designator Model Part Num ber Qty Des cription R351 66332A/6632B 0698-6320 1 Res 5K 0.1% R351 6633B 0698-5087 1 Res 6.2K 1% R351 6634B 0698-6320 1 Res 5K 1% R352 66332A/6632B 8159-0005 1 Jum per R353 All 0698-8959 1 Res 619K 1% R354 66332A/6632B 0757-0447 1 Res 16.
5 - Replaceable Parts 66 Designator Model Part Num ber Qty Des cription R386 66332A/6632B 0811-1672 1 Res 3.3 Oh m 5% 2W R386 6633B/6634B 0811-2553 1 Res 7.5 O hm 5% 2W PW R387 66332A/6632B 0811-1672 1 Res 3.3 Oh m 5% 2W R387 6633B/6634B 0811-2553 1 Res 7.
Replaceable Parts - 5 67 Designator Model Part Num ber Qty Des cription R421 66332A/6632B 0811-1672 1 Res 3.3 Oh m 5% 2W R421 6633B 0811-2553 1 Res 7.5 Oh m 5% 2W PW R422 66332A/6632B 0698-6351 1 Res 133K 0.1% R423 66332A/6632B/6633B 0699-0267 1 Res 10K 0.
5 - Replaceable Parts 68 Designator Model Part Num ber Qty Des cription R455 66332A/6632B 0698-6631 1 Res 2.5K 0.1% R455 6633B 0698-8863 1 Res 5.2K 0.1% R455 6634B 0699-0489 1 Res 16.
Replaceable Parts - 5 69 Designator Model Part Num ber Qty Des cription R497 66332A/6632B 0757-0289 1 Res 13.3K 1% R497 6633B/6634B 0757-0433 1 Res 3.32K 0.125W R498 - 500 All 0757-0407 2 Res 200 Oh m 1% 0.125W R505 6633B Not Used 1 R510 - 517 66332A/6632B 0811-1672 8 Res 3.
5 - Replaceable Parts 70 A2 Interface PCA, T ested for 66332A 5063-3439 No u ser replaceable parts A2 Interface PCA, T ested for 6632B/6633B/6634B 5063-3429 No user replaceable p arts A3 Front Panel PCA T ested for all m odels 5063-3432 No user replaceab le parts Table 5- 4.
71 6 Diagrams Introduction This chapt er contains draw ings and diagram s for troublesh ooting and m aintain ing th e Agilent Model 66332A Dy namic Meas urement DC Source and th e Agilen t Model 66332A/6632B/6633B/6634B S ystem DC Pow er Supplies.
6 - Diagr ams 72 Table 6-1. Model-dependent Components (continue d) Des ignato r 66332A/ 6632B 6633B 6634B Des ignato r 66332A/ 6632B 6633B 6634B R319 316 Ohm 511 O hm 750 Ohm R413 10K R320 1.5K 2.61k 1k R415 22K 22.22K 22.22K R321 80.6K 215k 340k R418 51.
Diagram s - 6 73 Table 6-2. A 1 Board Component Locations Ref. X Y Ref. X Y Re f. X Y Ref. X Y Ref. X Y C300 8.125 3.25 C371 5.05 7.65 D323 1.025 4.9 R301 5.45 1.0 R366 1.3 3.925 C301 2.075 0.525 C372 1.875 7.9 D324 0.1 4.375 R302 6.275 0.1 R367 0.675 4.
6 - Diagr ams 74 Table 6-2 continued Ref. X Y Ref. X Y R434 2.5 9.825 R500 2.175 4.325 R435 2.4 9.825 R505 0.525 6.8 R436 7.05 7.75 R510 6.2 5.1 R437 6.8 7.75 R511 6.2 7.2 R438 4.675 6.875 R512 6.55 5.45 R439 1.925 8.65 R513 6.55 7.75 R440 5.7 7.2 R514 6.
Figure 6-1. A1 Board Component Locations.
Figure 6 -2. A 4 and A6 Board Component Locations.
Figure 6-3. A1 Board schem atic (sh eet 1).
Figure 6-3. A1 Board schem atic (sh eet 2).
Figure 6-3. A1 Board schem atic (sh eet 3).
Figure 6-4. A6 Relay Option Board sch ematic.
81 Index —+— +OUT, 47 +sense, 47 —A— A1 boar d remova l, 45 A1 Main boa rd, 50 A2 boar d remova l, 44 A2 Interface Board, 48 A2S201 , 50 A3 boar d remova l, 45 A3 Front Panel, 48 ADC , 4 8 —.
Index 82 —J— J307 voltages , 39 —L— line voltag e wiring, 46 —M— ma nual revisi ons, 10 —N— noti ce, 5 —O— -OUT, 47 out of ra nge, 41 OV_Dete ct* , 48, 52 OV_Prog , 50 OV_SCR* , 48.
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