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1. 1 2 3 4 5 6 7 8 9 10 1 12 13 14 15 16 17 5 19 7000 i ELASH ROM FLASH ROM 488 ERED SUM R404 1481 1 ADC CHANNEL A MR ps A D r Exe g VDDDA__ A10 i 21 1 LCDONOFF a iea 70008 TE uy R403 19 1 DATACLKO DATACLKO e 28F800 VDDAA VDDO MS420 21 5 4 B11 A10 18 15 810 12VPROG S419 p VDDAA Rr RES 3V3A_ 5 016 ROM A6 48 ag Q0CDA C C D We mama 226416 C
2. R605 606 I I ST8560 2 011130 st8560 2 wmf Figure 9 8 Main PCA side 2 PCB version 3 9 14 Chapter 9 Circuit Diagrams Title Page 9 Introd ctioti soc nen I RR E au apa 9 3 9 2 Schematic Diagrams l 9 3 9 1 Circuit Diagrams 9 9 1 Introduction 9 1 Introduction This chapter contains all circuit diagrams and PCA drawings of the test tool There are no serviceable parts on the LCD unit Therefore no circuit diagrams and drawings of the LCD unit are provided Referring signals from one place to another in the circuit diagram
3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 oe FLYBACK CONVERTER ER dccus BC869 VBAT ROD 21 0 33E V567 L569 E 5 40 T 3V3GAR 4 813 Bt gt 4 13 3V3SADC imo mola Am S 1 d C568 L C565 C567 T i LINEAR SUPPLY YARA R508 10K TP572 L562 BATIDENT Jg J13 eee 1 30VD V561 tl 0572 TP573 EN BATTERY PACK ee Y MBRS3AO L563 150u R mee r 22n ATH 2 IVD p 1 4 1 120 R ipa 00 C512 vse2 tL C561 L 573 TP574 Se AEE ANTE et a 100n C548 150u L564 1500 22 MBRS340 I n 68uH 3V3A Fog FEE C555 Pl ev 1 1 390u 1 i 46 4 22n V551 MBRS340 190 5711504 Pen T x BYD77A P S8uH _ 3 1 10 2 A10 gt I R504 Rsos Rso7 C509 al amp z K L Lc576 TP577 3 61 r3 MAX 1E 1E T tu amp x 8 Y UA MBRS1100 150u He HH 150u aub z ui Rent NTC TEMP 3V3GAR 2 9999929992999 9 9 ele _ a C8 rH Li L SWITCH L heey 4 H1 1 SREB 8 56 658 amp amp amp amp atu zh 1 I
4. HVOEAE 9L viva 91 ssauqqv E dii31 097 snaado1 IHOIDIOva 3 0 V 38OHd Old max c D EC E c c cx ak i a d Er a TNS n GP ma ss er a rade a en eee al 5 OL Sna oavs AGO Usawa SERE 5d vas 199135 30 WOS Sas umm ar HOL1H3ANOS Lxx T 1 Liven E ZY XX A mg VIS3IOVG NIVO ITN3GHV8 T egoy TTOA1V8 482000 L a suova Rie P saliva T VOTOV H359IHL 3JONOHMd gt A3100vS unolva gt Lt 1 D 1 WANIVIN d H 0 WHO re l glz FERE 2 25 5 gt udi HO1HB3ANOO 2 5 eee 5 3SN3S 31VOVHO HOolvHvd3s 952000 rugis NAS AOE HOLH3ANOO uaiavav EAE H3MOd ua55iauL MN AS 1 5 5 n 8 INSOLE 9 l VAEVA 3 BE DVd 1292154 d m ERR SS SS SSS mn n a 8 T3NNVH2 4 T ivas wos y 8 38
5. derating to 5 Vrms With Shielded Banana to BNC Adapter Plug 120 see Figure 2 1 0 10 400 KHZ tec ERES EU ete EH D 300 Vrms gt a reckons ek seco Beas eee aqa t o e e ette derating to 5 Vrms 2 3 43 Service Manual MAX INPUT VOLTAGE Vrms 1000 500 ITH BB120 200 100 50 20 10 5 2 1 0 01 0 02 005 01 02 05 1 2 5 10 20 50 100 FREQUENCY MHz ST8571 Figure 2 1 Max Input Voltage vs Frequency Maximum floating voltage From any terminal to ground Oto 400 AZ 5 nieto retrato tee o ette ide ilie serta 600 Vrms 2 3 Function Specifications The accuracy of all measurements is within of reading number of counts from 18 C to 28 C For all specifications probe specifications must be added 2 3 1 Electrical functions Specifications are valid for signals with a fundamental between 40 and 70 Hz Minimum input voltage 4 V peak peak Minimum input 7 10 A peak peak 1 mV A Input bandwidth DC to 15 kHz unless specified otherwise Volts Amps Hertz oer a o EIU HERREN Ded Vrms Arms ac dc Hz Voltage ranges auto
6. 7 14 7 5 11 Reset ROM Line 7 14 RAM Test ran rM 7 14 ON OFF a una ee cae Ea AEE 7 15 TS D PYM CHE e 7 15 7 5 15 Randomize setii riei 7 15 Corrective Maintenance 7 1 Introduction 7 1 Introduction This chapter describes troubleshooting procedures that can be used to isolate problems with the test tool A warning Opening the case may expose hazardous voltages For example the voltage for the LCD back light fluorescent lamp is gt 400V Always disconnect the test tool from all voltage sources and remove the batteries before opening the case If repair of the disassembled test tool under voltage is required it shall be carried out only by qualified personnel using customary precautions against electric shock e If the test tool fails first verify that you are operating it correctly by reviewing the operating instructions in the Users Manual e When making measurements for fault finding you can use the black COM input banana jack or the metal shielding on the Main PCA unit as measurement ground e To access the Main PCA for measurements proceed as follows l 2 3 Remove the Main PCA unit see 6 2 5 Disassemble the Main PCA unit see 6 3 Connect the Display Assembly flat cable the Backlight cable and the Keypad Foil flex cable to the
7. ST8562 EPS Figure 6 1 Fluke 43B Main Assembly 6 4 Disassembling 6 2 Disassembling Procedures 6 2 5 Removing the Main PCA Unit Referring to Figure 6 1 use the following procedure to remove the main PCA unit 1 Open the test tool see Section 6 2 4 2 Disconnect the LCD flex cable and the keypad foil flat cable see Figure 6 2 Unlock the cables by lifting the connector latch The latch remains attached to the connector body The keypad foil is provided with a shielding flap that covers the LCD flat cable The end of the flap is put under the main PCA unit shielding plate and can be easily pulled out Caution To avoid contaminating the flex cable contacts with oil from your fingers do not touch the contacts or wear gloves Contaminated contacts may not cause immediate instrument failure in controlled environments Failures typically show up when contaminated units are operated in humid areas 3 Unplug the backlight cable Warning If the battery pack or the power adapter is connected the LCD backlight voltage on the wire cable is 400V when the test tool is on 4 Remove the two screws item 10 that secure the Main PCA unit to the top case 5 Lift the screw end of the Main PCA unit and remove the unit by gently wiggling the assembly from side to side as you pull backwards SHIELDING SLAP LCD P d TABS OF THE SHIELDING BACKLIGHT FLAT CABLE lt
8. nu u u aqu qua 0 5 2 counts 210 10 MA Z iicet xen eie rte re dette 1 96 2 counts 10 MHz to 30 MLI iiir reto te P reete Pere tete 2 5 2 counts Phase Input 1 to Input 2 6 22 60 Hz 10 400 Hz 4 eere eet ie a 2557 Peak voltage Peak max Peak 2 5 of full scale s s u er dab 10 of full scale Crest tup aaah puan ha au el pea pease 1 0 to 10 0 5 1 count 2 3 3 Meter Ohm Ratipesi nun RR Fa vede 500 0 Q to 5 000 MQ 30 00 MQ 0 6 5 counts Max Measurement Current u enne eere 0 5 mA Measurement Voltage at open circuit ener enne lt 4 Diode PNCCULACY 2 MID 2 5 counts Max Measurement Current mis apase e 0 5 mA Measurement Voltage at open 2 21 lt 4 Continuity hamana aaa assaka us lt 30 Q 5 Q Measurement Current x eere eite ee te EE e 0 5 mA Detection of Shorts ibn tta bebe diste dicte tales gt 1 ms Capacitance RANGES tura talent 50 00 nF to 500 0 2 10 counts Max Measurement Current essent enne ens 0 5 mA Temperature Ranges or F
9. Input 1 or Input 2 Trigger ln M auto triggering SOUIC6S iim Input 1 Input 2 Automatic not manually selectable Error for frequencies 1 MHz Voltage Levels casio e trier tero rS dietus 0 5 div at positive slope the top of the trigger symbol and at negative trigger the bottom of the trigger symbol is the trigger point Time Delay Real Time sampling sese 1 sample Time Delay Quasi Random sampling 10 ns Sensitivity input 1 CE gt 4 div 25 U sb RH rS gt 1 5 div 5 MEI anotasunman HER gt 0 5 div or 5 mV Sensitivity input 2 20 KHZ Loser duda eed ardeo gt 0 5 div Slope Selection us Iberi ier ee tei ertt eee eere ettet benda Positive negative Level Control Range Manual 2 8 gt 4 div within dynamic range Delay horizontal move 10 div 0 div used for horizontal move functionality Vertical Voltage TAN GOS xi tct bere eere nien eee 5 mV div to 500 V div Jraeedccuracy sin hdi tal abere M e bere 1 2 pixels Bandwidth input 1 voltage excluding test leads or probes DC to 20 MHz 3 dB with test leads TL 24 id tee nte DC to 1 MHz 3 dB with 10 1 probe VPS100 R optional DC to 20 MHz 3 dB with shielded t
10. r ass 4 26 4 6 3 Continuity Function Test nennen 4 26 4 6 4 Capacitance Measurements Test 4 27 4 7 Inr sh in oet tt D mt eit ise 4 28 4 8 Sags 67 9 uqu Wa u Sha 4 29 2 9 Hartmonics eO RR TOR DEREN URINE REIR URSI INE 4 30 4 10 VOLT AMPS HERTZ agan qan 4 30 AA POWER enero iiem prete rabies ee tr on 4 31 4 12 Transients t eet ee eie Dent TR Ra ehe ie tuia 4 32 Calibration Adjustment 1 111 5 1 SE Generals e ee n eet e RO 5 3 5 1 1 Introduction e repe 5 3 5 1 2 Calibration number and 4 2 2200 03000000000040000 000000000000 5 3 5 1 3 General Instructions eee eere ye tette a SS 5 4 5 2 Equipment Required For Calibration essen 5 4 5 3 Starting Calibration Adjustment sssssesseeeeeneeeeeee 5 4 5 4 Contrast Calibration Adjustment a 5 6 5 5 Warming Up amp 2 44 4400 0600000000000000000000000004 5 7 5 6 Final Calibration eret rte e er e reete s 5 7 35 6 HE Gain Input We u diete n eee a yh tes 5 8 5 6 2 Delta T Gain Trigger Delay Time amp Pulse Adjust Inp
11. 3 20 3 11 Random Repetitive Sampling Mode sese 3 22 3 12 Reference Voltage SectI lB J aq ener nnns 3 23 3 13 LCD Control n u aan AMA uM ka L Sas au Cae tates 3 26 4 1 Display Pixel Test uei diete ettet ern eere u or eo 4 4 4 2 Test Tool Input 1 to 5500A Scope Output 500 4 6 4 3 Test Tool Input 2 to 5500A NORMAL output sese 4 9 4 4 Test Tool Input 1 to 5500A Normal Output sese 4 13 4 5 Test Tool Input 1 2 to 5500A Normal Output 4 15 4 6 Test Tool Input 1 2 to 5500A Normal Output for gt 300V 4 23 4 7 Test Tool Input 1 to 5500A Normal Output 4 Wire 4 25 4 8 Test Tool Input 2 to 5500A NORMAL output esee 4 28 4 9 Test Tool Input 1 amp 2 5500A Normal Output essen 4 29 4 10 Bargraph Harmonics Volt ener 4 30 4 11 Bargraph Harmonics Ampere ener enne nennen nnns 4 30 4 12 Test Tool Input 1 to 5500A Normal Output 4 32 5 1 Version amp Calibration Sereen n 5 3 8 2 Display Test Pattern eie teet enr e nere eei eese 5 7 5 3 Gain Calibration Input Connections s
12. sese 1 1 kg 2 5 Ib Interface eb cedet des Que edge RS232 optically isolated Supported Printers HP Deskjet Laserjet PostScript and Epson FX80 Serial via PM9080 optically isolated RS232 Adapter Cable Parallel via PAC91 optically isolated Print Adapter Cable optional TO BG ss erneute te Pe P ere iden Dump and load settings and data Serial via PM9080 optically isolated RS232 adapter cable using SW43W FlukeView Power Quality Analyzer software 2 5 Current Probe A Safety Characteristics Designed for measurements on 600 Vrms Category Protection class double or reinforced insulation requirements in accordance with IEC 1010 1 e ANSI ISA S82 e CSA C222 No 1010 1 92 e UL1244 Electrical Specifications Current range esaet nt e te ere mee red oe end 1 A to 500 Arms AC current over range limit 700 Arms Maximum 10 minutes followed by removal from current carrying conductor for 30 minutes Output S19ridl 2 ee ee Cere eder mV ac A ac 2 8 Characteristics 2 6 Environmental Conditions Accuracy 5to 10 Hz PAO SODA stie rit te ite Saya ST laya 3 dB typically 10 to 20 Hz 110 300 5 300 t0 400 A Pa eet de u ha a iens 15 40040 500 aa 25 20 to 4
13. sese 5 4 5 3 Starting Calibration 5 4 5 4 Contrast Calibration Adjustment 5 6 5 5 Warming Up amp Pre Calibration eese 5 7 5 6 Final Calibration e ioter dte ua ene eed ee teen e eae 5 7 25 6 HE enar treo aste 5 8 5 6 2 Delta Gain Trigger Delay Time amp Pulse Adjust Input 1 5 9 5 6 3 Gain DMM Gain 2 2 20 200 00600000000000000000000000000080008 5 10 5 04 VOTE ZETO e eee 5 12 2 6 5 Gain cuo a ERN M mS 5 12 5 6 6 Capacitance Gain Low and High 5 13 5 6 7 Capacitance Clamp amp 7 1 21 1 4040400022440000000000000000000008050855 4 5 14 5 6 8 Capacitance Gal es tree ere ue ruere 5 14 5 7 Save Calibration Data and EXIt 5 15 Calibration Adjustment 5 1 General 5 1 General 5 1 1 Introduction The following information provides the complete Calibration Adjustment procedure for the Fluke 43B test tool The test tool allows closed case calibration using known reference sources It measures the reference signals calculates the correction factors and stores the correction factors in RAM After completing the calibration the correction factors can be stored in
14. a 4 12 4 5 7 Input 1 Trigger Level and Trigger Slope Test 4 13 4 5 8 Input 1 and 2 DC Voltage Accuracy Test 4 15 4 5 9 Input 1 and 2 AC Voltage Accuracy Test 4 17 4 5 10 Input 1 and 2 AC Input Coupling Test 4 19 4 5 11 Input 1 and 2 Volts Peak Measurements Test 4 20 4 5 12 Input 1 and 2 Phase Measurements Test 4 21 4 5 13 Input 1 and 2 High Voltage AC amp DC Accuracy Test 4 22 4 6 Ohms Continuity Capacitance a 4 25 4 6 1 Resistance Measurements Test 4 25 4 6 2 Diode Test Function Test essen 4 26 4 6 3 Continuity Function Test sss 4 27 4 6 4 Capacitance Measurements Test 4 27 4 7 Inr sh Current eere n a bte tette e aera 4 28 45 Sags SOS Well Sis niens Sen erede cte e vo shag ee HOUSE TIS 4 29 4 9 ee Haee TE 4 30 4 10 VOET AMDPS HERTDZ 5 ette A Duka thor Re NER 4 3 a unun m deine is 4 31 4 12 Transients aneio 4 32
15. 100 0 to 400 0 C or 200 0 to 800 0 F 0 5 5 counts 2 3 4 Record Record times selectable 4 min to 8 days endless 16 days Number of readings eerte eae eene tg eter Coi meet 1 or 2 simultaneously Record is available for the functions volts amps hertz power harmonics ohms continuity capacitance temperature e e e 5 2 7 43 Service Manual 2 4 Miscellaneous Display Useful Screen area aeree rete emt rt e eo 72 x 72 mm 2 83 x 2 83 in Resolution gn Ao rore irre eb Yous 240 x 240 pixels Backlight cette e Cold Cathode Fluorescent CCFL A Power External Power Adapter notet tee etf Hcet 8907 Input Veltage I 10 to 21 V dc EE 5 W typical Internal Rechargeable Ni Cd battery pack BP120 Voltage CHIOT 4 to 6 V dc Operating serere ee ones cde 4 hours Charging Time asas 4 hours with Fluke 43B off 12 hours with Fluke 43B on Refresh cycl esau EE 8 to 14 hours Memory Number of screen memorites 20 Number of transient memories temporary sese 40 Mechanical Height x width x depth 232 x 115 x 50 mm 9 1 x 4 5 x 2 in Weight including battery pack
16. s e ona 4 3 4 4 Display and Backlight Test sse 4 4 4 5 Input 1 and Input 2 Tests in the SCOPE MODE 4 5 4 5 1 Input 1 Trigger Sensitivity Test 4 6 4 5 2 Input 1 Frequency Response Upper Transition Point Test 4 7 4 5 3 Input 1 Frequency Measurement Accuracy Test 4 7 4 5 4 Input 2 Frequency Measurement Accuracy 4 9 4 5 5 Input 2 Trigger Level and Trigger Slope Test 4 10 4 5 6 Input 2 Trigger sensitivity Test 4 12 4 5 7 Input 1 Trigger Level and Trigger Slope Test 4 13 4 5 8 Input 1 and 2 DC Voltage Accuracy Test 4 15 4 5 9 Input 1 and 2 AC Voltage Accuracy Test 4 17 4 5 10 Input 1 and 2 AC Input Coupling Test 4 19 4 5 11 Input 1 and 2 Volts Peak Measurements 4 20 4 5 12 Input 1 and 2 Phase Measurements Test 4 21 4 5 13 Input 1 and 2 High Voltage AC amp DC Accuracy Test 4 22 4 6 Ohms Continuity Capacitance essent nnns 4 25 4 6 1 Resistance Measurements Test 000000000004 4 25 4 6 2 Diode Test Function Test
17. sssssseeeerenene 5 V 50 V 500 1250 V minimum 1 mV 10 mV 100 mV 1 V 1 10 counts Current ranges 50 00 A to 500 0 kA 1250 kA minimum 2 ener 10 mA 0 1 A 1 100A 1 1 10 counts Frequency range n hai R upay as 10 0 Hzto 15 0 kHz 20 0 10 70 HZ hte ee eee o a es 0 5 2 counts TeSOlIUCLODE ic 0 1 Hz 1 Hz 10 Hz 100 Hz CF Crest Factor range 1 0 to 10 0 5 1 count Power 1 and 3 phase 3 conductor balanced loads IS Tur ep Watt VA VAR PF DPF Hz Watt VA VAR ranges auto 250 W to 250 MW 625 MW 1 56 GW when selected total 2 200212122000040000000000000000000004 2 96 6 counts when selected fundamental f 4 4 counts Se a mak m m MP LI 0 00 to 1 00 0 0046025 DP DEO Ue E 08d not specified 0 25 0 0 90 0 04 EPIS ES 0 03 Characteristics 2 3 Function Specifications 0 00 to 1 00 0 04 2202000 tette teet ente u au s 10 0 Hz to 15 0 kHz 40 0 to 700 HZ azas ub het t enr eter receta 0 5 2 coun
18. 3 17 3 4 Ohms Ranges Trace Sensitivity and Current 3 18 3 5 Capacitance Ranges Current and Pulse Width 3 19 3 6 SIpnalStiu u ans eene enne enne nennen nennen nnn 3 27 4 Input 1 Frequency Measurement Accuracy Test 4 8 4 2 Volts DC Measurement Verification 4 17 4 3 Volts AC Measurement Verification Points aa 4 19 4 4 Input and 2 AC Input Coupling Verification Points 4 20 4 5 Volts Peak Measurement Verification 4 21 4 6 Phase Measurement Verification 4 22 4 7 V DC and V AC High Voltage Verification Tests 4 25 4 8 Resistance Measurement Verification Points 4 26 4 9 Capacitance Measurement Verification 16 0 4 27 4 10 Volts AMPS HERZ verification points a 4 31 4 11 Power Measurement Verification points esses 4 31 5 1 Gain Calibration Points 5 9 5 2 Gain Calibration Points 1 4 0 468 5 9 5 3 Volt Gain Calibration Points
19. SX Oxo gt a 9 4 26 Performance Verification 4 4 6 Ohms Continuity Capacitance 4 6 3 Continuity Function Test Proceed as follows 1 2 BOY MD Ee Connect the test tool to the 5500A as for the previous test see Figure 4 7 Select OHMS CONTINUITY CAPACITANCE 22 e Press MENU to select the main MENU e Press S to highlight OHMS CONTINUITY CAPACITANCE Press to select the item Press to select CONTINUITY Set the 5500A to 250 Use the 5500A COMP 2 wire mode Listen to hear that the beeper sounds continuously Set the 5500A to 350 Listen to hear that the beeper does not sound When you are finished set the 5500A to Standby 4 6 4 Capacitance Measurements Test Proceed as follows l Juge mV gy CoA Connect the test tool to the 5500A as for the previous test see Figure 4 7 Ensure that the 5500A is in Standby Select OHMS CONTINUITY CAPACITANCE e Press MENU to select the main MENU e Press e to highlight OHMS CONTINUITY CAPACITANCE e Press B to select the item Press B9 to select CAPACITANCE Set the 5500A to the first test point in Table 4 9 Use the 5500 OFF mode Observe the Input 1 main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to Standby Remove all test leads from the test tool to check the zero point Observe the
20. 9 a ze veoi 52 VCOIL a i P ps 3M Aum n m ene i 0554 UM TP504 C506 3 58 882 SNUB u 47n f I n 11 RCCHA1 41 551 4 0552 552 i 10 RCCHA2 50 100 100 9 5 i TEMP 49 FLYGATE POWER ADAPTER 4 55 FLYSENSP Se SESS 9 FLYSENSP Pet Sa 2501 TP503 BNX002 V501 501 V504 VBAT 3 VBATMEAS R551 1 INPUT MBRS340 MBRS340 ned 0 f 2 1 4 r3 RS 33uH m VBATSUP 60 VBATSUP 26K1 10K L 0 z AH see 10 esos MTD5P06E Ju 254 32 3 NX 7 V506 V503 L C503 L C504 54 VSENS VSENS E i NPUT eun 100n T MBRS340 390u 10 501 gt 180u 59 OQ0256 s 5029 3 2522 CHASENSN 14 CHAGATE T CHASENSN CHASENSP 15 CHASENSP P ASIC RSS VCHDRIVE 9 vcupRIVE M3V3A 58 2 VADAPTER 20 vapAPTER C502 P7VCHA 18 veatsup 17 RR P7VCHA 10 IMAXFLY 57 IMAXFLY 3V3SADC CHARGER l C507 2 vourni 51 F le eis Se sis 100n 13 24 R558 Rsse R564 31K6 5kt 100K VBATHIGH I VBATHIGH 6 IMAXCHA k MAINVAL 4 313 VADALOW 8 x 8 46 21 VADALOW x 8 5 m x 4 5 44 R565 E V566 d CHARCUR R534 CHARCURR 80 SPE 52 9 29 43 100 C APWM_BUS 1K47
21. PLATE INSIDE BOTH CABLE X SHIELDS KEYPAD FOIL FLEX CABLE A ST8035 ST8035 EPS Figure 6 2 Flex Cable Connectors 6 5 43 Service Manual 6 2 6 Removing the Display Assembly There are no serviceable parts in the display assembly Referring to Figure 6 1 use the following procedure to remove the display assembly 1 Remove the main PCA unit see Section 6 2 5 2 The keypad pressure plate item 9 is captivated by four plastic keeper tabs in the top case Press the plate down carefully slide the plate to release it from the tabs and then remove it 3 Remove the display assembly item 6 To prevent finger contamination wear cotton gloves or handle the display assembly by its edge After removing the display assembly the shielding bracket item 5 with the conductive foam strip item 4 the dust seal item 3 and the shielding foil item 2 can be removed 6 2 7 Removing the Keypad and Keypad Foil Referring to Figure 6 1 use the following procedure to remove the keypad and the keypad foil 1 Remove the display assembly see Section 6 2 6 2 Remove the keypad foil Notice the four keypad foil positioning pins in the top case 3 Remove the keypad Caution To avoid contaminating the keypad contacts and the keypad foil contacts with oil from your fingers do not touch the contacts or wear gloves Contaminated contacts may not cause immediate instrument failure in controlled environments
22. Press amp to highlight HARMONICS Press to select HARMONICS Set the 5500A to source a square wave 2 5V 60Hz NORMAL output WAVE square Check the bargraphs of VOLTS look like the ones in Figure 4 10 Press to enter the AMPS mode Check the bar graph look like the one in Figure 4 11 When you are finished set the 5500A to Standby 4055 4085 12410 1 5 9 13 17 21 25 29 33 37 41 45 49 1 5 9 13 17 21 25 29 33 37 41 45 49 Par AMPS WATTS VOLTS WATTS Figure 4 10 Bargraph Harmonics Volt Figure 4 11 Bargraph Harmonics Ampere 4 30 Performance Verification 4 4 10 VOLT AMPS HERTZ Proceed as follows to test VOLT AMPS HERTZ l 2 Connect the test tool to the 5500A as for the previous test shown in Figure 4 9 Press MEN Press amp to highlight VOLT AMPS HERTZ Press to select VOLT AMPS HERTZ Set the 5500A to source the AC voltages in the table NORMAL output Wave sine and check the readings When you are finished set the 5500A to Standby Table 4 10 Volts AMPS HERTZ verification points 5500A output 5500A Freq Reading1 Reading 2 x o S ooe 4 11 POWER Proceed as follows to test POWER 1 2 Connect the test tool to the 5500A as for the previous test shown in Figure 4 9 Press EP Press S to highlight POWER Press to select POWER Set the 5500A to source the AC voltages in the table NORMAL output Wave sine and check the readings When you are fini
23. Table 3 1 provides an overview of the blocks in which the test tool is broken down the main block function the ASIC name and the applicable circuit diagram Table 3 1 Fluke 43B Main Blocks ASIC Circuit Diagram INPUT 1 Input 1 signal conditioning C hannel ASIC OQ0258 Figure 9 1 TRIGGER Trigger selection and conditioning T rigger ASIC OQ0257 Figure 9 3 Current source for resistance capacitance continuity and diode measurements AC DC input coupling and Q F relay control Voltage reference source DIGITAL Analog to Digital Conversion D igital ASIC MOT0002 Figure 9 4 Acquisition of ADC samples Micro controller uP ROM RAM Keyboard and LCD control POWER Power supply battery charger P ower ASIC 000256 Figure 9 5 LCD back light voltage converter Optical interface input All circuits except the LCD unit and the KEYBOARD are located on one Printed Circuit Board PCB called the MAIN PCB The ASIC s are referred to as C ASIC Channel ASIC T ASIC Trigger ASIC P ASIC Power ASIC and D ASIC Digital ASIC 3 2 1 Input 1 Input 2 Measurement Circuits The basic input signal for the Input 1 and Input 2 circuits hardware is voltage The reading of Input 1 is in milli Volts The reading of Input 2 is in Amperes So the voltage on Input 2 is assumed to be supplied by a current clamp From the measured voltage samples the readings are calculated by the instrument firmware For example power readings are calculated fro
24. 4 1 Introduction Performance Verification 4 4 1 Introduction Warning Procedures in this chapter should be performed by qualified service personnel only To avoid electrical shock do not perform any servicing unless you are qualified to do so The test tool should be calibrated and in operating condition when you receive it The following performance tests are provided to ensure that the test tool is in a proper operating condition If the test tool fails any of the performance tests calibration adjustment see Chapter 5 and or repair see Chapter 7 is necessary The Performance Verification Procedure is based on the specifications listed in Chapter 2 of this Service Manual The values given here are valid for ambient temperatures between 18 and 28 C The Performance Verification Procedure is a quick way to check most of the test tool s specifications Because of the highly integrated design of the test tool it is not always necessary to check all features separately For example the duty cycle pulse width and frequency measurement are based on the same measurement principles so only one of these functions needs to be verified 4 2 Equipment Required For Verification The primary source instrument used in the verification procedures is the Fluke 5500A If a 5500A is not available you can substitute another calibrator as long as it meets the minimum test requirements Power Quality Option 5520A PQ is not strictly nec
25. GENOUT 10 8 3 A1 DCBIAS VATTP3V3 FE C182 R110 R111 R112 R113 R114 11 100n 2 15 10 10 10M 10M C111 C112 4 7 R105 4p7 m VATTN3V3 STE 105 10u SWHFO C113 C114 C116 GNDHFO 4 R108 4p R117 4p 511E 215E 1 COMMON black input SWHF1 C118 GNDHF1 4p7 HF2 C104 120p C117 10p th 470p C122 SWHF2 of GNDHF2 R172 R HF3 500E HF GNDHF3 C121 33p R118 R121 ma 3 r i TR AG 68E1 68E1 Ezra I a 0 TT r j 33 Lf i CHANNEL 1 NOPQRST RSEN HE 1 107 470p Baer esa 1 4 1 PROBE A AC DC R109 i ELM ZZ SL 2 15 1 1 R1 1 C148 C101 i EK en iw 7 i LF 2 R101 R102 R104 O 287K 467K K171 26K1 E 3 R137 R138 R139 R140 56K2 56 2 56K2 56K2 GPROT 1 1 1 INPUT1 C102 RIA R143 CALSIG 215K 909K 100n red input d R406 SOPPM PROTGND 500 4n7 R142 R144 1n SCLK i C142 147K 348E C146 100p INPUT 215 g L 50PPM BLOCK 1 X100 1 1 i REF_BUS 4 3 H8 1 1 I I I I 1 1 1 1 4p7 R156 100K R184 Circuit Diagrams 9 2 Schematic Diagrams 9 10 L181 47u 3V3A ai 5 C16 C181 22u L182 47u 3V3A o e 5 C16 5VA e a 5 816 APWM_BUS 4 01 OFFSET_A REF_BUS 3 H8 REFN TP153 DACTESTA 15 9 154 ADC_A 1 155 I C161 100
26. Voltage levels 20 50 100 200 of reference signal Number of transient memories temporary esses 40 Cursor reading Vpeak min Vpeak max at 5 of full scale Inrush Graphic display Current ranges selectable 14 5 A 10 A 50 A 100 A 500 A 1000 A Inrush times selectable 1 s 5s 105 50 s 100 s 5 min Cursor readings A peak max at cursor L u rrn E e r E 5 of full scale A peak max at 2 5 of full scale Time between cursors eene nnne nnne 0 2 2 pixels 2 3 2 Scope Input Impedance Input Tue oe ete vete ees 1 MQ 12 pF 2 pF With BB120 20 pF 3 pF Input 2 a 1 MQ 10 pF x 2 pF With BB120 18 pF 3 pF Horizontal Time base modes Normal Single Roll Ranges selectable within modes Normal once rrt he see 5 s to 20 ns div In Single shot iier e tere kde edes 5sto 1 ps div In Roll mode 41h deae ege uat btts gis 60 s to 1 s div Time DASC CLOW eene e et eee ra lt 0 4 1 pixel 2 2 5 43 Service Manual Maximum sampling rate TOMS TOGO S n usa a Sa ede reete det e EI sa 5 MS s PAVO KOE ta AA a L s IS 25 MS s Trigger source auto gt auto manual
27. a Ifa square wave is present on TP552 may be not the correct value then 1 Check the voltage on N501 pin 55 FLYSENSP For a correct converter this 1s a saw tooth voltage of 50 100 kHz 50 150 mVpp LLL sso a sawtooth voltage is present on R501 no current or a DC current flows in FET V554 The primary coil or V554 may be defective or interrupted connections Check R504 R506 R507 battery current sense resistors these resistors may be fused due to a short in FET V554 b Ifan incorrect sawtooth is present on R501 this can be caused by overloaded outputs Frequency low e g lt lt 50 kHz 250 mVpp underloaded outputs Frequency high e g gt gt 100 kHz lt lt 100 mVpp bad FET V554 Sawtooth voltage is not linear 2 Check V552 and V553 check R570 and VCOIL connections b No FLYGATE square wave is present Check TP526 FREQPS for a 50 100 kHz 3 3 Vpp square wave If correct then check V552 and V553 If no square wave 526 then go to step 4 Check TP528 PWRONOFF for 3V If not correct see 7 5 13 Power ON OFF Check N501 pin 43 COSC for a triangle waveform 50 100 kHz 1 6V to 3 2V If not correct check C553 and connections check IREF see step 6 If all correct replace N501 Check N501 pin 74 IREF for 1 6V If not correct a Check N501 pin 73 REFPWM2 for 3V3 REFPWM2 is supplied by 501 and derived from REFP on the reference circuit on the Trigger par
28. e Press MENU to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 4 15 43 Service Manual 4 16 Select DC coupling amp reading for Input 1 and 2 Press to select menu SCOPE SETUP Press 35 to select Input 1 READING e Press S to highlight DC e Press to confirm L mark changes to Bl e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight DC Coupling e Press to confirm L mark changes to Bl Press to select Input 2 READING e Press to select the Input 2 READING e Press S to highlight DC e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 COUPLING e Press S to highlight DC Coupling e Press to confirm L mark changes to e Press to return to SCOPE Set the 5500A to source the appropriate DC voltage from table 4 2 Observe the main reading and check to see if it is within the range shown under the appropriate column Select the appropriate sensitivity for the test tool Press select RANGE 1 or RANGE 2 e Press to select RANGE 1 or press to select RANGE 2 e Press S to select the ranges mentioned in the table Continue through the test points When you are finished set the 5500A to 0 zero Volt and to Standby Performance Verification 4 5 Input 1 and Input 2 Tests SCOPE Table 4 2 Volts DC Measurement Verifi
29. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 3 1 1 1 1 1 2 2 2 2 2 2 2 9 9 5 43 Service Manual 979757 9 w vw 4 4 ww 4 vw v m Q gt mg g m m g g g g a O m m m m m m m m gg a Dw oa om O OO 1 1 co vuy uv v uv v v d NNa 00 100 00 4 CA Q Q Q CA R Q W N N 9 9 9 y 9 v m 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 3 3 3 3 3 3 3 3 m 9 6 Chapter 10 Modifications Title Page 10 1 Software modifications n 10 3 10 2 Hardware 2 7 600000 00 nnne enean 10 3 10 1 0 10 1 Software modifications 10 1 Software modifications Changes and improvements made to the test tool software firmware are identified by incrementing the software version number These changes are documented on a supplemental change errata sheet which when applicable is included with the manual To display the software version proceed as follows 1 Press 8 to open the MENU e 2 Press to highlight INSTRUMENT SETUP 3 Press select INSTRUMENT SETUP ES 4 Press to highlight VERSION amp CALIBRATION 5 Press select VERSION amp CALIBRATION 6 Pr
30. Digital Circuit Keyboard 9 11 Circuit Diagram 5 Power 1 enne 9 12 Main PCA side 1 PCB version 3 9 13 Main PCA side 2 version 3 9 14 viii Chapter 1 Safety Instructions Title Page IT Introduction iiie eo ENS 1 3 1 2 Safety Precautions rrr tret reete pei ee Fee tee Pee ce e Eo rio Pure en 1 3 1 3 Caution and Warning Statements esses 1 3 1 4 Symbols ase SER Gt E ues 1 3 L S Impaired Safety e ete eo n edere ae ida eee etas 1 4 1 6 General Safety 2 enne 1 4 Safety Instructions 1 1 1 Introduction 1 1 Introduction Read these pages carefully before beginning to install and use the instrument The following paragraphs contain information cautions and warnings which must be followed to ensure safe operation and to keep the instrument in a safe condition Warning Servicing described in this manual is to be done only by qualified service personnel To avoid electrical shock do not service the instrument unless you are qualified to do so 1 2 Safety Precautions For the correct and safe use of this instrument it is essential that both operating and service personnel follow generally accepted safety procedures in addition to the safety precautions specified in this manual Specific warning and cau
31. R131 R132 R133 R134 R136 T ASIC 000257 P ASIC 000256 LOW POW OPAMP LMC7101BIM5X NSC LAMP CONTROLLER UC3872DW UNI MTL FILM MRS25 1 220K 0 25W MTL FILM MRS25 1 220K 0 25W MTL FILM MRS25 1 487K MTL FILM MRS25 1 487K RESISTOR CHIP RC12H 1 1M RESISTOR CHIP RC12H 1 26K1 RESISTOR CHIP RC12H 1 511E PTC THERM DISC 600V 300 500E RESISTOR CHIP RC12H 1 511E RESISTOR CHIP RC12H 1 2K15 RESISTOR CHIP RC12H 1 2K15 RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC12H 1 215E RESISTOR CHIP RC12H 1 215E RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12H 1 464E RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12G 1 1M RESISTOR CHIP RC12G 1 100K RESISTOR CHIP RC12G 1 10K RESISTOR CHIP RC12G 1 1K RESISTOR CHIP RC 02G 1 100E List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator 5322 209 13142 5322 209 13143 5322 209 15144 5322 209 14851 4822 053 20224 4822 053 20224 4822 050 24874 4822 050 24874 4822 117 11948 5322 117 12448 5322 117 12451 5322 116 40274 5322 117 12451 5322 117 12452 5322 117 12452 4822 051 20106 4822 051 20106 4822 051 20106 4822 051 20106 5322 117 12453 5322 117 12453 5322 117 12454 5322 117 12455 4822 051 20106 5322 117 12454 5322 117 12454 5322 117 12484 5322 117 12485 5322 117 12486 5322 117 124
32. TRIGQUAL 1 NC NC 156 NC be R431 BD ADT 2 ADCAT IOSEXDTA Hee putt POS_B en POS BD TP431 ADC A 06 3 154 DEBUG RSTRAMP ADC A D5 4 153 ROM CSO R483 R432 e A ADCA5 D16CS0 AD K OFFSET_B OFFSETBD 04 5 ADCAA 51 1 152 18 r 51K1 E ETE TP436 VD 6 151 ROM A18 F VDD D16CS2A1 D480 R482 V471 TRIGLEV1 _ R433 TRGLEV1D RAN DOMIZE HOLDOFF B11 gt 1 7 vss 150 ROMREAD 74LVC32 51E BAS85 D480 a a as ADC A D3 8 ADCA3 ROMWR 140 ROMWRITE 2 TALVC32 R434 21 TRIGLEV2 TRGLEV2D ADC_A_D2 9 ADCA2 vss 14871 gc 4037 6 147K HOTOV ADC_A_D1 10 ADCA1 vop 147 1 VD B41 1 nb a OFFSET_A R438 OFFSETAD ADC_A_DO 11 ADCA0 ROMRST 146 aes tt VD 12 VCLAMPA 143 3 E8 Be R439 55 3 E8 E POS_A 21K5 POS AD HOLDOFF 13 HOLDOFF RAMD7 144 RAM 07 RR 212 V461 HO OUT 14 RAMD6 143 RAM DS E SADCLEV SADCLEVD TP482 tok N BAS16 HO IN 15 HoscHMIN Ramps 42 D5 R442 OPTION RAMPCLK 16 TROTCLK RAMD4 141 04 RAM CHARCUR CHARCURID SMPCLK Bu D 17 RAMD3 140 RAM D3 I 1 47 HO_IN 18 139 RAM_D2 vss D471 RAMD2 C431 C433 C439 L C442 SMPCLK 1 39 suPGLK RAMD1 138 RAM D1 D475 E 1 22 4n7 22 A 2 137 RAM DI a E I i R479 TP483 18 ALLTRIG m 2 RAMOS 20 RAM_CS0
33. TURN ON amp MAINVAL H MAINVAL H TURN OFF Operational Operational amp Charge Mode Mode Charge Mode MAINVAL L TURN ON BATTVOLT lt 4V U MAINVAL L or AutoShutDown Battery refresh or TURN OFF Figure 3 2 Fluke 43B Start up Sequence Operating Modes Table 3 2 shows an overview of the test tool operating modes Table 3 2 Fluke 43B Operating Modes we Idle mode No power adapter and no battery installed test tool off VBAT amp 3V3GAR No valid instrument software or and gt key pressed when turning on Operational amp Power adapter connected and test tool on Test tool operational and eges Operational mode No power adapter connected battery Test tool operational powered Pun J 3 8 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions 3 3 Detailed Circuit Descriptions 3 3 1 Power Circuit The description below refers to circuit diagram Figure 9 5 Power Sources Operating Modes Figure 3 3 shows a simplified diagram of the power supply and battery charger circuit SUPPLY CONVERTER VBAT Em VGARDRIVE CHARGER CONVERTER FROM POWER ADAPTER 2 V506 L501 Level shift 8514 26 VCHDRVE 219 I T cso 18 P7VCHA C507 POWER ASIC Figure 3 3 Power Supply Block Diagram As described in Section 3 2 5 the test tool operating mode depends on the connected power source The voltage VBA
34. Terminal Emulation TTY Generic Terminal Preferences Terminal Modes CR gt CR LF Line Wrap Inbound Local Echo L1 Outbound Sound Communications Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Flow Control Xon Xoff Connector COMn 3 Turn the test tool off Keep the keys pressed and turn the test tool on again This will start up the mask software You will hear a very weak beep now 4 Corrective Maintenance 7 7 5 Miscellaneous Functions In the terminal program type capital characters X no ENTER After a number of characters the test tool mask software will respond with an acknowledge 0 zero This indicates that the communication between the Terminal program and the test tool is accomplished Type ID and press Enter The test tool will return an acknowledge 0 zero and the string Universal Host Mask software UHM 2 1 If it does not check the Terminal program settings the interface connection and the test tool Optical Port 7 5 5 Type EX10 H400000 H20000 and press Enter The test tool will return one of the following acknowledges 0 the RAM is OK 1 syntax error in the typed command 6 the RAM does not properly function Notice that the acknowledge overwites the first character of the message sent to the test tool 7 5 13 Power ON OFF l 2 Check TP528 for at power and at power off supplied by D471 If not correct do the 7 4 1 tests first Check MS444
35. The ADC data is read and processed by the D ASIC and represented as a numerical reading and a bar graph Table 3 4 shows the relation between the reading range Q the trace sensitivity Q d and the current in Rx Table 3 4 Ohms Ranges Trace Sensitivity and Current To protect the current source from being damaged by a voltage applied to the input a resistor R172 and a protection circuit are provided See Section 3 3 3 Current Source During measuring input voltage measurements gain measurements and zero measurements are done As a result the voltage supplied to the ADC is a multiplexed zero reference reference input voltage signal Capacitance Measurements Input 1 only The capacitance measurement is based on the equation C x dV I x dt The unknown capacitor Cx is charged with a constant known current The voltage across Cx increases and the time lapse between two different known threshold crossings is measured Thus dV I and dt are known and the capacitance can be calculated The unknown capacitance Cx is connected to the red Input 1 safety banana socket and the black COM input The T ASIC supplies a constant current to Cx via relay contacts K173 and protection PTC resistor R172 The voltage on Cx is supplied to two comparators in the C ASIC via the LF input The threshold levels th and th of the comparators are fixed see Figure 3 9 The time lapse between the first and the second threshold c
36. can suppress the probe detection If this signal 1s low The PROBE A and PROBE B lines are permanently low via RA71 472 regardless of a probe is connected or not connected This function is used in all appropriate modes except the SCOPE mode TXD RXD Serial Interface Optical Port 3 27 43 Service Manual 3 28 The optical Interface output is directly connected to the TXD line pin 86 The optical input line is buffered by the P ASIC on the power part The buffered line is supplied to the RXD input pin 87 The serial data communication RS232 is controlled by the D ASIC Slow ADC Control SADC Bus The SELMUXO 2 pins 96 98 and SLOWADC pin 100 lines are used for measurements of various analog signals as described in Section 3 3 1 SLOW ADC BATIDENT The BATTIDENT line pin 90 is connected to R508 on the Power part and to a resistor in the battery pack If the battery is removed this is signaled to the D ASIC BATTIDENT line goes high MAINVAL FREQPS The MAINVAL signal pin91 is supplied by the P ASIC and indicates the presence of the power adapter voltage high present The FREQPS signal pin 93 is also supplied by the P ASIC It is the same signal that controls the Fly Back Converter control voltage FLYGATE The D ASIC measures the frequency in order to detect if the Fly Back Converter is running within specified frequency limits D ASIC Clocks 25 MHz crystal B403 controls the D ASI
37. e Press MENU to select the MENU Press S till SCOPE is highlighted e Press to select SCOPE mode 3 Select the following test tool setup e Press to select menu SCOPE SETUP e Press S to highlight Input 2 Reading Press go to Input 2 READING e Press S to highlight Hz e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 Coupling menu Press S to highlight DC Coupling e Press to confirm L mark changes to e Press to return to SCOPE 4 Set the 5500A to source a sine wave of 600 mV 15 kHz NORMAL output MODE WAVE sine 5 Observe the Input 2 main reading on the test tool and check the reading between 14 8 and 15 2 kHz 6 When you are finished set the 5500A to Standby 4 9 43 Service Manual 4 10 4 5 5 Input 2 Trigger Level and Trigger Slope Test Proceed as follows 1 2 Connect the test tool to the 5500A as for the previous test shown in Figure 4 3 Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode Make Input 2 active e Press to select menu SCOPE SETUP e Press S to highlight the Input 2 READING Press to select Input 2 READING e Press S to highlight AC DCrms e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 Coupling menu e Press S to highlight DC
38. logic circuit in the D ASIC that is active even when the test tool 1s turned off Via the PROBE A and PROBE B lines connected to the Input 1 and Input 2 banana shielding the D ASIC can detect if a probe is connected The D ASIC sends commands to the C ASICs and T ASIC via the SCLK and SDAT serial control lines e g to select the required trigger source Various I O lines are provided e g to control the BUZZER and the Slow ADC via the SADC bus 3 2 4 Power Circuit 3 6 The test tool can be powered via the power adapter or by the battery pack If the power adapter is connected it powers the test tool and charges the battery via the CHARGER CONVERTER circuit The battery charge current is sensed by sense resistor Rs signal IBAT It is controlled by changing the output current of the CHARGER CONVERTER control signal CHAGATE If no power adapter is connected the battery pack supplies the VBAT voltage The VBAT voltage powers the P ASIC and is also supplied to the FLY BACK CONVERTER switched mode power supply If the test tool is turned on the FLY BACK CONVERTER generates supply voltages for various test tool circuits The 3 V3GAR supply voltage powers the D ASIC RAM and ROM If the test tool is turned off the battery supplies the 3V3GAR voltage via transistor V569 This transistor is controlled by the P ASIC So when the test tool is turned off the D ASIC can still control the battery charging process CHARCURR signal
39. the real time clock the on off key and the serial RS232 interface to turn the test tool on To monitor and control the battery charging process the P ASIC senses and buffers battery signals as temperature TEMP voltage BATVOLT current IBA T Via the SLOW ADC various analog signals can be measured by the D ASIC Involved signals are battery voltage BATVOLT battery type IDENT battery temperature TEMP battery current BATCUR LCD temperature LCDTEMP from LCD unit and 3 test output pins of the C ASIC s and the T ASIC DACTEST The signals are used for control and test purposes The BACK LIGHT CONVERTER generates the 400V supply voltage for the LCD fluorescent back light lamp If the lamp is defective a 1 5 kV voltage can be present for 0 2 second maximum The brightness is controlled by the BACKBRIG signal supplied by the D ASIC Serial communication with a PC or printer is possible via the RS232 optically isolated interface The P ASIC buffers the received data line RXDA and supplies the buffered data RXD to the D ASIC The transmit data line TXD is directly connected to the D ASIC Circuit Descriptions 3 2 Block Diagram 3 2 5 Start up Sequence Operating Modes The test tool sequences through the next steps when power is applied see Figure 3 2 1 The P ASIC is directly powered by the battery or power adapter voltage VBA T Initially the Fly Back Converter is off and the D ASIC is powered by VBAT via
40. then N501 is defective Connect TP531 for a short time max 1 minute to ground and see if the FET gate TP502 now shows a 100 kHz pulse signal If it does not continue at step 7d If it does the CHARCURR control signal is not correct continue at step 7c Check the CHARCURR control signal The CHARCURR voltage on TP531 is controlled by a pulse width modulated voltage CHARCUR from the D ASIC D471 pin 40 The D ASIC measures the required signals needed for control via the Slow ADC 7 5 43 Service Manual 7 6 1 Check the SLOW ADC see 7 5 3 2 Check VGARVAL N501 pin 64 for 3 3V If not correct check if the line 1s shorted to ground If it is not then replace N501 3 Trace the CHARCURR signal path to R534 R 442 and D471 D ASIC output pin 40 d Check the following 1 C506 and connections to N501 2 Connections between V506 and N501 pin 16 CHAGATE 3 The voltage at TP501 N501 pin 19 VCHDRIVE for 15 20V 4 The voltage at N501 pin 43 for a triangle waveform 80 100 kHz 1 6V to 3 2V 5 Ifl to 4 correct then replace N501 7 4 Starting with a Dead Test Tool If the test tool cannot be turned on when powered by a charged battery pack or by the power adapter follow the stwmf below to locate the fault l 2 Connect a power adapter and a charged battery pack Turn the test tool on and listen if you hear a beep a Ifyou hear no beep continue at 7 4 1 Test Tool Completely De
41. to the first calibration point in Table 5 1 Set the 5500A in operate OPR Press to start the calibration Wait until the display shows calibration status READY aay cR Press to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points in Table 5 1 8 Set the 5500A to source a 1 kHz square wave Output SCOPE MODE wavegen WAVE square to the first calibration point in Table 5 2 9 Press to select the first step in Table 5 2 10 Press to start the calibration 11 Wait until the display shows calibration status READY 12 Press to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points Table 5 2 13 When you are finished set the 5500A to Standby 14 Continue at Section 5 6 2 5 8 Calibration Adjustment 5 6 Final Calibration Table 5 1 HF Gain Calibration Points Fast Cal step 5500A Setting 1 Test Tool Input Signal Requirements 1 1 2 50 1 KHz trise lt 100 ns flatness after rising edge 0 596 after 200 ns HFG amp FI A B CL 0600 HFG amp FI A B CL 0602 100 mV HFG amp FI CL 0603 100 mV 200 mV HFG amp FI A B CL 0604 HFG amp FI A B CL 0605 amp FI A B CL 0606 amp FI A B CL 0607 HFG amp FI A CL 0608 D As the 5500A output is not terminate
42. transistor V569 3V3GAR If the voltage 3V3GAR is below 3 05 V the P ASIC keeps its output signal VGARVAL supplied to the D ASIC low and the D ASIC will not start up The test tool is not working and is in the Idle mode If the voltage 3V3GAR is above 3 05 V the P ASIC makes the line VGARVAL high and the D ASIC will start up The test tool is operative now If it is powered by batteries only and not turned on it is in the Off mode In this mode the D ASIC is active the real time clock runs and the ON OFF key is monitored to see if the test tool will be turned on If the power adapter is connected P ASIC output MAINVAL high and or the test tool is turned on the embedded D ASIC program called mask software starts up The mask software checks if valid instrument software is present in the Flash ROM If not the test tool does not start up and the mask software continues running until the test tool is turned off or the power is removed This is called the Mask active mode The mask active mode can also be entered by pressing the and gt key when turning on the test tool If valid instrument software is present one of the following modes becomes active Charge mode The Charge mode is entered when the test tool is powered by the power adapter and is turned off The FLY BACK CONVERTER is off The CHARGER CONVERTER charges the batteries 1f installed Operational amp Charge mode The Operational amp Charge mode is
43. 1 10E 5322 117 12464 R201 MTL FILM RST MRS25 1 487K 4822 050 24874 R202 MTL FILM RST MRS25 1 487K 4822 050 24874 R203 RESISTOR CHIP RC12H 1 1M 4822 117 11948 R204 RESISTOR CHIP RC12H 1 26K1 5322 117 12448 206 209 211 R212 R213 R214 R231 R232 R233 R234 R236 R237 R238 R239 R240 R241 R242 R243 R246 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R271 R282 R284 R286 PTC THERM DISC 600V 300 500E RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC11 2 RC11 2 RC11 2 RC11 2 RC12G 1 RC12G 1 RC12G 1 RC12G 1 RC 02G 1 2K15 10M 10M 10M 10M 1M 100K 10K 1K 100E SMDRES 261K 1 TC100 1206 SMDRES 261K 1 TC100 1206 SMDRES 261K 1 TC100 1206 SMDRES 215K 1 TC100 1206 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12G 1 RC12G 1 RC12G 1 SMDRES 1M 1 TC50 0805 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12G 196 RC12H 1 RC12H 1 RC12H 196 RC12H 1 RC12G 196 RC12H 1 RC12H 196 RC12H 1 RC12H 196 215K 147K 909K 100K 100K 681K 681K 178K 100K 287E 287E 100E 51K1 100K 348E 10E 10E 10E List of Replaceable Par
44. 1 Check the voltage on TP521 for 3 3V 2 Press to start the test tool data output Check the voltage TXD on TP521 for a burst of pulses pulses from 2V to 3 3V The length of the burst and the pulses depends on the selected baud rate 7 5 6 Input Channel 1 and 2 Voltage Measurements Reset the test tool press and Select the Scope Roll mode for both input channels Press highlight SCOPE press Press 9 SETUP highlight INPUT 2 Coupling OFF press highlight LIDC press highlight Time Base NORMAL press highlight press press BACK Apply a 1 kHz square wave to Input 1 and Input 2 and change the test tool sensitivity V div to make the complete square wave visible Check TP154 ADC A and TP254 ADC B for the signal shown below Input positive Inputzero ev TER eps Hes p 0 3 to 1 4V 150 mV div Input negative A trace amplitude of 1 division results in an 150 mV voltage on TP154 255 Moving the trace position with a zero input signal results in a TP154 254 voltage of about 0 3 V bottom to 1 4V top If the voltages are not correct do stwmf 6 to 16 if these stwmf are correct then replace the C ASIC If the voltages are correct the error is most probably caused by the ADC or ADC control continue at step 16 Check TP156 TRIGA and TP256 TRIGB The TRIGA and TRIGB signals must be the inverted input signals with an amplitude of 50 mV per
45. 1 WMF Figure 9 4 Circuit Diagram 4 Digital Circuit 9 10 9 9 2 Schematic Diagrams lii TEMA MS445 EB E KEYPAD FOIL IE MS444 MS443 MS442 MS441 MS440 MS439 MS438 MS437 5436 5435 5434 5433 MS432 MS431 SAVE PRINT 4 ST8558 980722 ST8558 WMF Figure 9 5 Circuit Diagram 4 cont Digital Circuit Keyboard 9 11 43 Service Manual
46. 1 and Figure 9 2 The Input 1 and Input 2 circuits are partly identical Both circuits condition input voltages See section 3 2 1 for a description of the differences between Input 1 and 2 The Input 1 2 circuitry is built up around C ASIC 000258 The C ASIC is placed directly behind the input connector and transforms the input signal to levels that are suitable for the ADC and trigger circuits The C ASIC Figure 3 8 shows the simplified C ASIC block diagram The C ASIC consists of separate paths for HF and LF signals an output stage that delivers signals to the trigger and ADC circuits and a control block that allows software control of all modes and adjustments The transition frequency from the LF path to the HF path is approximately 20 kHz but there 1s a large overlap CHANNEL ASIC OQ 0258 ADC HF IN HF PATH OUTPUT STAGE LF PATH CONTROL SUPPLY INPUT GROUND PROTECT BUS CAL POS SUPPLY TRIGGER Figure 3 8 C ASIC Block Diagram LF input The LF input pin 42 is connected to a LF decade attenuator in voltage mode or to a high impedance buffer for resistance and capacitance measurements The LF decade attenuator consists of an amplifier with switchable external feedback resistors R131 to R136 Depending on the selected range the LF attenuation factor which will be set to 1 10 100 1000 10 000 The C ASIC includes a LF pre amplifier with switchable gain factors for the 1 2 5 steps
47. 2F3 4 5 4 02 407 4 06 441 ST8556 1 00 01 21 ST8556 1 WMF Figure 9 3 Circuit Diagram 3 Trigger Circuit 43 Service Manual
48. 4 Miscellaneous si eet 2 8 2 5 Current Probe re te t maa t e etie ees 2 8 2 6 Environmental Conditions sess 2 9 2 7 Electromagnetic Immunity eene enne 2 10 3 Circuit Deseriptiols 1 2 citet lorte oce CER 3 1 Introductions oett rtm 3 3 3 2 Block Diagram eene ener erre eene nennen 3 3 3 2 1 Input 1 Input 2 Measurement Circutts 3 3 3 2 2 Trigger CATCUIU och ies tie tdeo aa Die aan teal 3 5 3 2 3 Digital Circuit secet eet eer epe tr I ecd 3 5 3 2 4 Power Circuit eene rt ut o ep eR eter UH T 3 6 3 2 5 Start up Sequence Operating Modes 3 7 3 3 Detailed Circuit Descriptions 3 9 3 3 L Power te e ete o p ES I RR REPRE 3 9 3 3 2 Input 1 Input 2 Measurement Circutts 3 14 2 2 2 Trigger CATCUIL cero o eer Or tasqa 3 20 43 Service Manual 3 34 Digital Cir Cuties ua utaq 3 24 Performance Verification 4 4 1 4 Introduction crie e ER 4 3 4 2 Equipment Required For Verification 4 3 4 3 How ette ene tinere epe tene tute pese that
49. 5322 126 13825 5322 122 32268 5322 122 33082 5322 122 33082 5322 122 33082 5322 122 33082 5322 122 33082 4822 122 31195 5322 122 33082 5322 122 33082 4822 122 31202 5322 122 33082 5322 122 33082 4822 122 31202 5322 126 10786 5322 122 32287 8 43 Service Manual Reference Description Ordering Code Designator C133 CERCHIPCAP63V 5 47PF 5322 122 32452 C134 CER CHIP CAP 63V 5 470PF 5322 122 32268 136 CER CHIP 63V 10 4 7NF 5322 126 10223 C142 CHIPCAP NPO 0805 5 1NF 5322 126 10511 C145 CHIPCAP NPO 0805 5 1NF 5322 126 10511 C146 CHIPCAP NPO 0805 5 1NF 5322 126 10511 C148 CHIPCAP X7R 0805 10 10NF 5322 122 34098 C152 X7R 0805 1096 15NF 4822 122 33128 C153 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C156 CHIPCAP NPO 0805 5 1NF 5322 126 10511 C158 CER CHIP CAP 63V 5 150PF 5322 122 33538 C159 CHIPCAP 0805 5 100PF 5322 122 32531 161 25 20 100 5322 126 13638 162 CER CHIP CAP 63V 0 25PF 4 7PF 5322 122 32287 C181 ALCAP SANYO 10 20 22UF 5322 124 11837 C182 CER CHIPCAP 25V 20 100NF 5322 126 13638 C183 ALCAP SANYO 10 20 22UF 5322 124 11837 C184 CER CHIPCAP 25V 20 100NF 5322 126 13638 C186 CER CHIPCAP 25V 20 100NF 5322 126 13638 C187 ALCAP SANYO 10 20 22UF 5322 124 11837 C188 CER CHIPCAP 25V 20 100NF 5322 126 13638 C189 CER CHIPCAP 25V 20 100NF 5322 126 13638 C190 CER CHIPCAP 25V 20 100NF 5322 126 13638 C191 CER CHIPCAP 25V 20 100NF 5322 126 13638 C199 CER CHI
50. 5322 209 15199 4022 304 11601 8 43 Service Manual Reference Description Ordering Code Designator D480 4X2 INP OR 74LVC32APW 4022 304 10771 D531 8 INP 74HC4051D PEL 9337 148 20653 495 BUZZER PKM13EPP 4002 MUR 5322 280 10311 521 IR LED SFH409 2 SIE 5322 130 61296 H522 PHOTODIODE OP906 OPT 5322 130 10777 K171 DPDT RELAY ASL 1 5W K B05 5322 280 10309 K173 DPDT RELAY DSP1 L 1 5V 5322 280 10312 K271 DPDT RELAY ASL 1 5W K B05 5322 280 10309 L181 CHIP INDUCT 47UH 10 4822 157 70794 L182 CHIP INDUCT 47UH 10 4822 157 70794 L183 CHIP INDUCT 47UH 10 4822 157 70794 L281 CHIP INDUCT 47UH 10 4822 157 70794 L282 CHIP INDUCT 47UH 10 4822 157 70794 L283 CHIP INDUCT 47UH 10 4822 157 70794 L481 CHIP INDUCT 47UH 10 4822 157 70794 L501 CHOKE 33UH TDK 5322 157 10994 L562 CHIP INDUCT 47UH 10 4822 157 70794 L563 CHIP INDUCT 47UH 10 4822 157 70794 L564 FIXED INDUCOR 68UH 10 TDK 5322 157 10995 L566 FIXED INDUCOR 68UH 10 TDK 5322 157 10995 L567 CHIP INDUCT 47UH 10 4822 157 70794 L569 FIXED INDUCOR 68UH 10 TDK 5322 157 10995 L600 SHIELDED CHOKE 150UH TDK 5322 157 10996 N101 C ASIC OQ0258 5322 209 13141 N201 C ASIC OQ0258 5322 209 13141 N202 LOW POW OPAMP _LM7301IMX 5322 209 16799 N301 N501 N531 N600 R1 R2 R101 R102 R103 R104 R105 R106 R108 R109 R110 R111 R112 R113 R114 R116 R117 R118 R119 R120 R121 R125
51. 600 Vrms up to 2 km Linearly derating from 600 down to 400 Vrms between 2 km to 4 5 km nao eerte ista bove asha 12 km 40 000 feet MIDEAUO OR max 3 g Mind max 30 g Electromagnetic Compatibility 2 50081 1 1992 55022 and 60555 2 os ie rtr EN 50082 2 1992 IEC1000 4 2 3 4 5 See also Tables 2 1 to 2 3 Enclosure Protection IP51 ref IEC529 2 2 9 43 Service Manual 2 7 Electromagnetic Immunity The Fluke 43B including standard accessories conforms with the EEC directive 89 336 for immunity as defined by IEC1000 4 3 with the addition of the following tables Disturbance with test leads TL24 or Current Clamp 80i 500s e Volts amps hertz e Resistance Capacitance e Power e Harmonics Table 2 1 No Visible Disturbance No visible disturbance E 3 V m E 10 V m Frequency 10 kHz 27 MHz Frequency 27 MHz 1 GHz no visible disturbance Disturbance with test leads TL24 in scope mode e Vacrdc True RMS Table 2 2 Disturbance lt 1 Disturbance less than 1 E 3V m E 10V m of full scale Frequency 10 kHz 27 MHz 2 Vidiv 500 V div 10 V div 500 V div Frequency 27 MHz 200 MHz 500 mV div 500V div 2 V div 500 V div Frequency 200 MHz 1 GHz 5 mV div 500 V div no visible disturbanc
52. BSS84 PEL 5322 130 10669 V501 SCHOTTKY DIODE MBRS340T3 MOT 5322 130 10674 V503 SCHOTTKY DIODE MBRS340T3 MOT 5322 130 10674 V504 SCHOTTKY DIODE MBRS340T3 MOT 5322 130 10674 V506 POWER TMOS FET MTD5POGET4 MOT 5322 130 10671 V550 RECT DIODE BYD77A 5322 130 10763 RECT DIODE BYD77A N CHAN MOSFET 2SK974STR HIT RECT DIODE BYD77A SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS1100T3 MOT LF TRANSISTOR BC848C PEL LF TRANSISTOR BC848C PEL SCHOTTKY DIODE MBRS340T3 MOT LF TRANSISTOR BC869 PEL TMOS P CH FET MMSF3P03HD MOT TMOS N CH FET MMDF3NO2HD SCHOTTKY DIODE MBRS340T3 MOT SIL DIODE BAS16 PEL N CHAN FET BSN20 PEL LF TRANSISTOR BC858C PEL FLEX PRINT CONNECTOR 15 P FCN FLEX PRINT CONNECTOR 21 P FCN DC POWER JACK 0739 01 010 MALE HEADER 2MM 6 P DBL RT ANG MALE HEADER 7 SNG RT ANG EMI FILTER 50V 10A MUR List of Replaceable Parts 8 Reference Description Ordering Code Designator 5322 130 10763 5322 130 62921 5322 130 10763 5322 130 10674 5322 130 10674 5322 130 10674 5322 130 10675 5322 130 42136 5322 130 42136 5322 130 10674 4822 130 60142 5322 130 10672 5322 130 10673 5322 130 10674 5322 130 31928 5322 130 63289 4822 130 42513 5322 265 10725 5322 265 10726 4822 267 30431 5322 267 10501 5322 267 10502 5322 156 11139 8 6 Accessory Replacement Parts Black ground lead for STL120 5322 320 11354 8 23 101 R182
53. COUPLING e Press S to highlight DC Coupling e Press to confirm L mark changes to e Press to return to SCOPE 4 Set the 5500A to source a sine wave to the first test point in Table 4 5 NORMAL output WAVE sine 5 Observe the Input 1 and Input 2 main reading and check to see if it is within the range shown under the appropriate column Continue through the test points of table 4 5 7 When you are finished set the 5500A to Standby Table 4 5 Volts Peak Measurement Verification Points 5500A output Vrms sine 5500A Frequency Reading 1 Reading 2 1768 5 4506550 4500550 4 5 12 Input 1 2 Phase Measurements Test Proceed as follows 1 2 Connect the test tool to the 5500A as for the previous test see Figure 4 5 Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode Select DC coupling for Input 1 and 2 Reading Phase for Input 2 Press to select menu SCOPE SETUP e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight DC Coupling Press to confirm L mark changes to 4 21 43 Service Manual e Press S to select Input 2 READING e Press to select the Input 2 READING e Press S to highlight Phase e Press to confirm mark changes to Bl e Press S to highlight Input 2 Coupling e Press to select the Input 2 COUPLING e Press S to high
54. Calibration Adjustment 5 8 Starting Calibration Adjustment The Calibration Adjustment Procedure uses built in calibration setups that can be accessed in the Maintenance mode To enter the Maintenance mode proceed as follows e Press and hold E e Press and release e Release The display shows the Calibration Adjustment Screen The display shows the first calibration step Warming Up CL 0200 and the calibration status IDLE valid or IDLE invalid 4 Continue with either a or b below a To calibrate the display contrast adjustment range and the default contrast go to Section 5 4 Contrast Calibration Adjustment This calibration step is only required if the display cannot made dark or light enough or if the display after a test tool reset 1s too light or too dark b calibrate the test tool without calibrating the contrast go to Section 5 5 Warming Up amp Pre calibration Explanation of screen messages and key functions When the test tool is in the Maintenance Mode only the F1 F2 F3 and ENTER soft keys the ON OFF key and the backlight key can be operated unless otherwise stated The calibration adjustment screen shows the actual calibration step name and number and its status Cal Name CL nnnn Status Calibration step nnnn Status can be IDLE valid After re entering this step the calibration process is not started The calibration data of this step are valid This means that
55. Coupling e Press to confirm L mark changes to Bl e Press to return to SCOPE Select trigger on channel 2 e Short circuit Input 1 with a BB120 and 500 feed through terminator e Set the 5500A to source 1V 50 Hz sine wave NORMAL output MODE WAVE sine Select the following test tool setup e Press to select RANGE then press to select RANGE 2 e Press e to select 1 kA d e Press to select a timebase of 10 ms d e Press e e Press to select TRIGGER e Using S set the trigger level to 2 divisions from the screen center For positive slope triggering the trigger level is the top of the trigger icon J Set the 5500A to source 0 4V DC e Press to select menu SCOPE SETUP e Press S to highlight Time base 10 11 12 13 14 15 16 Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE Press Gi to select the TIME BASE menu e Press to select SINGLE e Press to confirm L mark changes to e Press S to highlight Trigger slope Press to select the TRIGGER SLOPE menu e Press S to highlight positive trigger J e Press to confirm L changes to Bl e Press to return to SCOPE Verify that no trace is shown on the test tool display and that at the upper right corner of the display HOLD is not shown If the display shows HOLD then press Hold should disappear and the test tool is re armed for a trigger Increase the 5500 voltage slowly 0 1V s
56. FlashROM The test tool should be calibrated after repair or if it fails the performance test The test tool has a normal calibration cycle of one year 5 1 2 Calibration number and date When storing valid calibration data in FlashROM after performing the calibration adjustment procedure the calibration date is set to the actual test tool date and calibration number is raised by one To display the calibration date and number 1 Press to switch Fluke 43 2 Press to leave the startup screen 3 Press to go to the MENU screen 4 Press to highlight INSTRUMENT SETUP item 5 Press to open the INSTRUMENT SETUP menu 6 Press amp to highlight VERSION amp CALIBRATION 7 Press GQ to open the VERSION amp CALIBRATION menu 8 Press to return to the INSTRUMENT SETUP menu INSTRUMEHT SETUP VERSION amp CALIBRATION MODEL NUMBER 43B SOFTWARE VERSION U2 03 CALIBRATION HUMBER 4 CALIBRATION DATE 1022422001 BATTERY REFRESH DATE 09707 7 2001 VERSION BMP Figure 5 1 Version amp Calibration Screen 5 3 43 Service Manual 5 1 3 General Instructions Follow these general instructions for all calibration steps Allow the 5500A to satisfy its specified warm up period For each calibration point wait for the 5500A to settle The required warm up period for the test tool is included in the WarmingUp amp PreCal calibration step Ensure that the test tool battery
57. L mark changes to e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight DC Coupling e Press to confirm L mark changes to e Press S to select Input 2 READING e Press to select the Input 2 READING Press to highlight DC e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 COUPLING e Press S to highlight DC Coupling e Press to confirm L mark changes to e Press to return to SCOPE Select the appropriate sensitivity for the test tool 4 23 43 Service Manual 4 24 10 Press 6 to select RANGE 1 or RANGE 2 e Press to select RANGE 1 or Press to select RANGE 2 e Press S to select the ranges mentioned in the table Set the 5500A to source the appropriate DC voltage NORMAL output WAVE sine Observe the Input 1 and 2 main reading V DC and check to see if it is within the range shown under the appropriate column Continue through the test points of table 4 7 Select DC coupling and ACrms reading for Input 1 and 2 e Press to select menu SCOPE SETUP Press to select Input 1 READING e Press S to highlight ACrms e Press to confirm L mark changes to e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight DC Coupling e Press to confirm L mark changes to e Press S to select Input 2 RE
58. MIDADC_A rca 156 TRIGA 3 01 SENSE 3 c1 TRACEROT r 3 F13 SDAT 4 17 SCLK 4 17 ICAL 3 1 1 ST8554 980722 ST8554 WMF Figure 9 1 Circuit Diagram 1 Channel 1 Circuit 9 7 43 Service Manual INPUT BLOCK X100 4 H7 C202 100n V BC848C Q V201 BC848C R294 100K I I TAN oto ad ent 1 CHANNEL 2 5 R201 R202 i 487 487 INPUT 2 L C204 grey input 1 211 4 7 1 1 1 1 1 206 4n7 3 4 5 N201 DCBIAS R211 iom R237 R238 R239 R240 SWHFO 261K 261K 261K 215K GNDHFO R212 R290 C292 mm C293 Lio 56K2 10 10 SWHF1 56K2 GNDHF1 HF2 R292 56K2 SWHF2 GNDHF2 R293 46K4 TP259 HF3 C295 GNDHF3 Op FBO R295 R296 Pim A8 C207 C296 C297 206 100 100 R209 2K15 a R203 Lim 2 3 4 R204 2 cPRoT R241 215 50PPM R242 147K 50PPM REFATT REF BUS CALSIG 909K 50PPM PROTGND SCLK C242 R246 1n C246 1M 33n N 3 H8 9 8 VATTP3V3 VATTN3V3 VAMPPSUP GNDREF VAMPN3V3 GNDDIG VDIGN3V3 VDIGN3V3 CERR1 ADDRESS DACTEST MIDADC TRIGGER TRACEROT SDAT N 7 8 R282 Lice C282 100n 28298 D2 10E TP253 TP254 TP255 TP256 TP258 100p Figure 9 2 Circuit Diagram 2 9 10 L281 MEUM 3V3A 5 C16 C281 22u L282 47u 3V3A LU U U 9 rVR 15 16 L283 47u 5VA 5 15 5 16 APWM_BUS 4 D1 OFFSET
59. ONKEY D471 for when pressing the ON key the signal must below for 100 150 ms 7 5 14 PWM Circuit l Check the PWM control signals generated by D471 The signals must show 0 3V pulses with variable duty cycle and a frequency of 100 25 or 6 kHz a CHARCURD CONTR D z 100 kHz b SADCLEV POS A D BACKBRIG POS B D TRIGLEV2D TRIGLEVID HO RNDM 25 kHz c OFFSETA D OFFSETB D 6 kHz If not correct check a TP306 REFPWM2 for 3 3V used for CHARCURD SADCLEV b TP304 REFPWM I for 3 3V used for other PWM signals If TP306 and TP304 are correct D471 may be defective 7 5 15 Randomize Circuit l 2 Check TP483 for 0 3V pulses 25 kHz variable duty cycle Check TP482 for 3 0V pulses variable frequency and duty cycle 7 15 8 1 Introduction Chapter 8 List of Replaceable Parts Title Page asa m usay RR 8 3 8 2 How to Obtain Parts 4 8 3 8 3 Final Assembly Parts 4 12 240024000 0000000 aaa ushay assay 8 4 8 4 Main PCA Unit P rts x au anna etl sib A 8 6 8 5 Mam PCA Parts nc as eee nde e ld ri e vines 8 7 8 6 Accessory Replacement Parts sess 8 23 List of Replaceable Parts 8 8 1 Introduction 8 1 Introduction This chapter contains an illustrated list of replaceable parts for the model 43B ScopeMeter test tool Parts are listed by assembly alphabetized by item number or reference designator Each asse
60. R562 R563 R564 R565 R570 R580 R591 R600 R602 RES 01 1206 5 RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC12H 1 RC12H 1 RC12H 196 RC12H 1 RC12H 1 RC12H 1 RC12H 196 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 196 RC12H 1 LRCO1 5 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 196 RC12H 1 RC12H 196 RC12H 1 RC12H 196 10K 46E4 2K87 26K1 3K16 23K7 100E 147E 34K8 261K 21K5 100E 1K47 51K1 348E 0 1 10K 4K22 26K1 10K 31K6 5K11 100E 100E 100K 100K 100K 100K RESISTOR CHIP LRCO1 5 0E33 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC12H 1 RC12H 1 2K15 5K11 10K List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator 4822 117 11151 4822 117 10833 5322 117 12463 5322 117 12608 5322 117 12448 5322 117 12465 5322 117 12481 4822 117 11373 5322 117 12482 5322 117 12467 5322 117 12617 5322 117 12477 4822 117 11373 5322 117 12479 5322 117 12462 5322 117 12456 5322 117 1
61. S to highlight DC Coupling Press to confirm L mark changes to Press S to highlight Input 1 Reading Press to go to Input 1 READING Press S to highlight Hz Press to confirm L mark changes to Press to return to SCOPE 4 Set the 5500A to source a leveled sine wave of 600 mV peak to peak SCOPE output MODE levsine 5 Setthe 5500A frequency according to the first test point in Table 4 1 6 Observe the Input 1 Reading on the test tool and check to see if it is within the range shown under the appropriate column 7 Continue through the test points 8 When you are finished set the 5500A to Standby Table 4 1 Input 1 Frequency Measurement Accuracy Test 5500A output 600 mVpp Input 1 Reading 10 MHz 09 7 to 10 3 MHz 40 MHz 38 8 to 41 2 MHz Note Duty Cycle and Pulse Width measurements are based on the same principles as Frequency measurements Therefore the Duty Cycle and Pulse Width measurement function will not be verified separately Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE 4 5 4 Input 2 Frequency Measurement Accuracy Test Proceed as follows to test the Input 2 frequency measurement accuracy 1 Connect the test tool to the 5500A as shown in Figure 4 3 FLUKE 5500A CALIBRATOR PM9091 001 1 5m 9092 001 0 5m 9081 518588 ST8588 wmf Figure 4 3 Test Tool Input 2 to 5500A NORMAL output 2 Select the AUTO test tool setup
62. and 4 and connected resistors supply the REFADCT and REFADCB reference voltages for the ADC s Both voltages directly influence the gain accuracy of the ADC s The T ASIC can select some of the reference voltages to be output to pin 8 REFATT The REFATT voltage is used for internal calibration of the Input 1 and B overall gain Tracerot Signal The T ASIC generates the TRACEROT signal used by the C ASIC s Control signals TROTRST and TROTCLK are provided by the D ASIC AC DC Relay and Q F Relay Control The Input 1 2 AC DC relays K171 K271 and the Input 1 Q F relay K173 are controlled by the T ASIC output signals ACDCA pin 22 ACDCB pin 23 and OHMA pin 24 SCLK SDAT Signals T ASIC control data e g for trigger source mode edge selection and relay control are provided by the D ASIC via the SCLK and SDAT serial control lines 3 3 4 Digital Circuit 3 24 See the Fluke 43B block diagram Figure 3 1 and circuit diagram Figure 9 4 The Digital part is built up around the D ASIC MOT0002 It provides the following functions e Analog to Digital Conversion of the conditioned Input and Input 2 signals ADC data acquisition for traces and numerical readings Trigger processing e Pulse width measurements e g for capacitance measurement function e Microprocessor Flash EPROM and RAM control e Display control e Keyboard control ON OFF control e Miscellaneous functions as PWM signal generation SDA SCL serial dat
63. can be dangerous to life The instrument shall be disconnected from all voltage sources before it is opened Capacitors inside the instrument can hold their charge even if the instrument has been separated from all voltage sources Components which are important for the safety of the instrument may only be replaced by components obtained through your local FLUKE organization These parts are indicated with an asterisk in the List of Replaceable Parts Chapter 8 Chapter 2 Characteristics Title Page 2 Al Introduction uy bb tete i ae O 2 3 2 2 Safety Specifications ee ero n aT EA e 2 3 2 3 Function Specifications seere unaq aaah nennen 2 4 2 3 Electrical functions uiae RR Eit Het 2 4 2 9 DES CODO vds dae b o ra e tette e idee eoe ei ee Adae 2 5 Di Ded MCE soon ete rer E VS 2 7 tente ir haces il 2 7 2 5 sodes 2 8 2 5 Current Probes ee eee oes cree o Q 2 8 2 6 Environmental Conditions essen eene eene nennen nn 2 9 2 7 Electromagnetic Immunity ener enne 2 10 Characteristics 2 2 1 Introduction 2 1 Introduction Safety Characteristics The Fluke 43B has been designed and tested in accordance with Standards ANSI ISA 582 01 1994 61010 1 1993 1010 1 CAN CSA C22 2 1010 1 92 including app
64. controls a CLAMP circuit in the T ASIC This circuit limits the voltage on Input 1 at capacitance measurements The protection circuit prevents the T ASIC from being damaged by voltages supplied to the input during resistance or capacitance measurements The T ASIC contains opamps to derive reference voltages from a 1 23 V reference source The gain factors for these opamps are determined by resistors in the REF GAIN circuit The reference voltages are supplied to various circuits The T ASIC also controls the Input 1 2 AC DC input coupling relays and the relay Control data for the T ASIC are provided by the D ASIC via the SDAT and SCLK serial communication lines 3 2 3 Digital Circuit The D ASIC includes a micro processor ADC sample acquisition logic trigger logic display and keyboard control logic I O ports and various other logic circuits The instrument software is stored in the 8M FlashROM the 4M RAM is used for temporary data storage For Voltage and Resistance measurements the conditioned Input 1 2 voltages are supplied to the ADC A and ADC B ADC The voltages are sampled and digitized by the ADC s The output data of the ADC s are acquired and processed by the D ASIC For capacitance measurements the pulse width of the T ASIC output signal ALLTRIG which is proportional to the unknown capacitance is counted by the D ASIC The DPWM BUS Digital Pulse Width Modulation supplies square wave signals with a variable du
65. d 9 Setthe 5500 to source a 20 kHz leveled sine wave of 100 mV peak to peak if necessary adjust the 5500 to half a division peak to peak on the display 10 Verify that the signal is well triggered if necessary adjust the trigger level see 7 11 When you are finished set the 5500A to Standby 4 5 7 Input 1 Trigger Level and Trigger Slope Test Proceed as follows 1 Connect the test tool to the 5500A as shown in Figure 4 4 FLUKE 5500A CALIBRATOR 9091 001 1 5m 9092 001 0 5m PM9081 ST8586 WMF Figure 4 4 Test Tool Input 1 to 5500A Normal Output 2 Select the AUTO test tool setup e Press MENU to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 3 Select the following test tool setup e Press to select menu SCOPE SETUP Press to select Input 1 READING e Press S to highlight AC DCrms e Press to confirm L mark changes to Bl e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu Press S to highlight DC Coupling Press to confirm L mark changes to e Press to return to SCOPE 4 13 43 Service Manual 4 14 10 e Press to select Input 1 RANGE e Press to select 1V d e Press 20 to select a timebase of 10 ms d e Press to leave RANGE 1 e Press to select TRIGGER e Using S set the trigger level to 2 divisions from the screen center For positive slope triggering the trigge
66. each next pixel A trace can be built up from a single period of the input signal Random repetitive equivalent sampling TRIGDT signal For time base settings below 1 us d the time between two successive pixels on the screen is smaller than the time between two successive samples For example at 20 ns d the time between two pixels is 20 25 0 8 ns and the sample distance is 40 ns sample rate 25 MHz A number of sweeps must be taken to reconstruct the original signal see Figure 3 11 As the samples are taken randomly with respect to the trigger moment the time dt must be known to position the samples on the correct LCD pixel The TRIGDT signal is a measure for the time between the trigger and the sample moment dt The pulse duration of the TRIGDT signal is approximately 4 us 20 ps 3 21 43 Service Manual 3 22 3 13 SAMPLES SWEEP 1 4 14 dt2 SAMPLES SWEEP 2 Ws EN EN 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 Figure 3 11 Random Repetitive Sampling Mode DACTEST output A frequency detector in the T ASIC monitors the ALLTRIG signal frequency If the frequency is too high to obtain a reliable transmission to the D ASIC the DACTEST output pin 29 will become high The DACTEST signal is read by the D ASIC via the slow ADC on the Power part It and indicates that the D ASIC cannot use the ALLTRIG signal e g for qualified
67. entered when the test tool is powered by the power adapter and is turned on The FLY BACK CONVERTER is on the CHARGER CONVERTER supplies the primary current If batteries are installed they will be charged In this mode a battery refresh see below can be done Operational mode The Operational mode is entered when the test tool is powered by batteries only and is turned on The FLY BACK CONVERTER is on the batteries supply the primary current If the battery voltage VBAT drops below 4V when starting up the fly back converter the Off mode is entered Battery Refresh Each 3 months the batteries need a deep discharge full charge cycle called a refresh This prevents battery capacity loss due to the memory effect A refresh cycle takes 16 hours maximum depending on the battery status A refresh can be started via the keyboard gt ww I gt INSTRUMENT SETUP gt START BATTERY REFRESH GJ if the test tool is on and the power adapter is connected During a refresh first the batteries are completely discharged and then they are completely charged again 3 7 43 Service Manual VGARVAL L Idle mode VGARVAL H Off mode TURN ON or MAINVAL H T Flash ROM NOT OK Mask Active TURN OFF Mask StartUp OR mode Flash ROM OK amp TURN Extern StartUp MAINVAL L amp TURN OFF or BATTVOLT lt 4V Software TURN ON amp BATTVOLT gt 4 amp MAINVAL L TURN OFF amp MAINVAL H
68. faster 740 us for time base 5 us div and slower pulse width increases with time base e TP336 for 0 6 0V pulses TP436 for 3 3 0V pulses the pulse width is about 40 us 10 ms If not correct check the RANDOMIZE circuit see 7 5 15 f TP437 SMPCLK for a 5 MHz time base gt 10 ms div or 25 MHz time base lt 1 ms div clock signal 3 3 V Check SMPCLK on both sides of R339 7 13 43 Service Manual 7 5 9 Reference Voltages 1 Check a TP306 for 3 3V TP307 for 1 23V If not correct check replace V301 R307 3112 P ASIC N501 b TP301for 1 6V TP302 for 0 1V TP304 for 3 3V TP310 see figure below in ROLL mode TP310 is zero If not correct check replace REFERENCE GAIN circuit and T ASIC N301 1 2V 1 2V lt 800 ms 7 5 10 Buzzer Circuit 1 Press and select OHMS CONTINUITY CAPACITANCE Press Continuity 2 Short circuit Input 1 to COM The buzzer is activated now Check TP496 for a 4 kHz 0 3V square wave during beeping 3 V if not activated 4 Check TP495 for a 4 kHz 3 30V square wave during beeping TP495 is 3V if the beeper is not activated 7 5 11 Reset ROM Line ROMRST 1 Check TP487 for 3V supplied by D471 7 5 12 RAM Test You can use the Microsoft Windows Terminal program to test the RAM Proceed as follows 1 Connect the Test Tool to a PC via the Optical Interface Cable PM9080 2 Start the Terminal program and select the following Settings
69. is charged sufficiently 5 2 Equipment Required For Calibration The primary source instrument used in the calibration procedures is the Fluke 5500A If a 5500A is not available you can substitute another calibrator as long as it meets the minimum test requirements Fluke 5500A Multi Product Calibrator including 5500A SC Oscilloscope Calibration Option Stackable Test Leads 4x supplied with the 5500A 500 Coax Cables 2x Fluke PM9091 or PM9092 500 feed through termination 2x Fluke PM9585 Fluke BB120 Shielded Banana to Female BNC adapters 2x supplied with the Fluke 43B Dual Banana Plug to Female BNC Adapter 1x Fluke PM9081 001 Male BNC to Dual Female BNC Adapter 1x Fluke PM9093 001 5 3 Starting Calibration Adjustment Follow the steps below to start calibration adjustments 1 2 Power the test tool via the power adapter input using the 8907 power adapter Check the actual test tool date and adjust the date if necessary e Press to switch the Fluke 43 If the date on the startup screen is correct then continue at step 3 e Press to leave the STARTUP screen Press rm to go to MENU e Press 8 to highlight INSTRUMENT SETUP item Press to open the INSTRUMENT SETUP menu Press to highlight DATE Press to open the DATE menu e Adjust the date with S and 20 if necessary When ready press Press to exit the INSTRUMENT SETUP menu Select the Maintenance mode
70. low 0 0 6V which corresponds to a 0 on the line The level on the RXDA line is compared by a comparator in the P ASIC to a 100 mV level The comparator output is the RXD line which is supplied to the D ASIC for communication and for external triggering 3 13 43 Service Manual The D ASIC controls the transmit data line TXD If the line is low diode H521 will emit light The supply voltage for the optical interface receive circuit RXDA is the 3 V3SADC voltage The 3V3SADC voltage is present if the test tool is turned on or if the Power Adapter is connected or both So if the Power Adapter is present serial communication is always possible even when the test tool 1s off Backlight Converter The LCD back light is provided by a 22 4 mm fluorescent lamp in LCD unit The back light converter generates the 300 400 Vpp supply voltage The circuit consist of A pulse width modulated PWM buck regulator to generate a variable regulated voltage V600 V602 L600 C602 e zero voltage switched ZVS resonant push pull converter to transform the variable regulated voltage into a high voltage AC output V601 T600 The PWM buck regulator consists of FET V600 V602 L600 C602 and a control circuit in N600 FET V600 is turned on and off by a square wave voltage on the COUT output of N600 pin 14 By changing the duty cycle of this signal the output on C602 provides a variable regulated voltage
71. oe T A10 Dil PR BE B e amp e 3 R486 R489 for visual mainboard mE y e eo zzz 10K version detection D 2 R453 VDDAB VDDO a A10 SCLK R473 e e uuuso BUZZER 5 lt j B11 C457 C458 Pr rire es 1 100E gt gt 422 TP472 I L C466 100n 100 SCLK SDAT 100 Bi 100n R474 a E 496 495 R495 226488 C487 e a 3K16 100p F 100p s 2l 2 1 1 SADC BUS NS VDDA VDDD VDDO 14 2 a 5 pi DO 0101 ARCB 5 vIN 15 ADC B D1 TP474 A BUZZER i 16 ADC_B_D2 R496 BUZ REFADCT 8 05 17 B 476 L FREQPS 045 3K16 C451 18 KEYPAD FOIL o MAINVAL D451 D4 I L a 5F15 VD 4p7 C452 9 vrm D5 19 ADC B D5 F8 i R469 BATIDENT Y 100n 8792 pe 20 ADC B D6 100K 15 85 10489 REFADCB 10 p 21 ADC B D7 4 B401 3 3 B403 22n R499 g 1 I 32KHz 25MHz 56K2 VGARVAL 5 B10 C453 7 IREF 24 SMPCLK I i 2 ju 3 PWRONOFF 5 016 100 EN 13 I RXD BH3 REF_BUS VSSA2 VSSA1 STBY NC vssp vsso ji 1 TXD 5 H15 12 1 Wd 23 i C486 C485 C484 C483 C482 C481 5 un SEE CIRCUIT DIAGRAM 4 27p 27 22 22 22 22 S ST8557 1 MDADC 9 DIGITAL CIRCUIT KEYBOARD 000121 ST8557
72. on the Trigger part The ADC output voltages MIDADC A B are supplied to the C ASIC s input pin 28 and are added to the conditioned input signal The MIDADC voltage matches the middle of the C ASIC output swing to the middle of the ADC input swing Current IREF is supplied to pin 7 of the ADC s via R403 R453 for biasing internal ADC circuits ADC data acquisition for traces and numerical readings During an acquisition cycle ADC samples are acquired for Scope traces and numerical readings The test tool software starts an acquisition cycle The D ASIC acquires data from the ADC and stores them internally in a cyclic Fast Acquisition Memory FAM The D ASIC also makes the HOLDOFF line low to enable the T ASIC to generate the trigger signal TRIGDT The acquisition cycle is stopped if the required number of samples is acquired From the FAM the ADC data are moved to the RAM D475 The ADC data stored in the RAM are processed and represented as traces and readings Triggering HOLDOFF TRIGDT Randomize To start a new trace the D ASIC makes the HOLDOFF signal low Now the T ASIC can generate the trigger signal TRIGDT For signal frequencies higher than the system clock frequency and in the random repetitive sampling mode no fixed time relation between the HOLDOFF signal and the system clock is allowed The RANDOMIZE circuit desynchronizes the HOLDOFF from the clock by phase modulation with a LF ramp signal Trigger qualifying ALLTR
73. standby mode before making any connection between the calibrator and the test tool Proceed as follows to do the Gain DMM calibration Press to select the first calibration step in Table 5 3 2 Connect the test tool to the 5500A as shown in Figure 5 5 Calibration Adjustment 5 6 Final Calibration FLUKE 5500A CALIBRATOR 9081 9093 9091 001 1 5 9092 001 0 5 ST8001 WMF Figure 5 5 Volt Gain Calibration Input Connections lt 300V Set the 5500A to supply a DC voltage to the first calibration point in Table 5 3 Set the 5500A to operate OPR Press to start the calibration Wait until the display shows calibration status READY DU Ov pA Press to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points of Table 5 3 Set 5500A to Standby continue with step 9 Table 5 3 Volt Gain Calibration Points lt 300V Cal step Input value Gain DMM CL0800 12 5 mV 9 Press to select calibration step Gain DMM CL0814 IDLE 43 Service Manual 10 Connect the test tool to the 5500A as shown in Figure 5 6 11 12 13 14 15 16 FLUKE 5500A CALIBRATOR ST8129 WMF Figure 5 6 Volt Gain Calibration Input Connections 500V Set the 5500A to supply a DC voltage of 500V Set the 5500A to operate OPR Press to start the calibration Gain DMM CL0814 an
74. tool setup e Press NU to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 3 Select timebase of 100 ns d e Press 221 to select RANGE e Press to select 100 ns d 4 Select sensitivity of 200 mV d e Press e to select 200 mV d 5 Setthe 5500 to source 5 MHz leveled sine wave of 100 mV peak to peak SCOPE output MODE levsine 6 Verify that the signal is well triggered if necessary adjust the trigger level see 7 7 Adjusting trigger level e Press to highlight TRIGGER then press S to adjust the trigger level 8 Set the 5500A to source a 25 MHz leveled sine wave of 400 mV peak to peak 9 Select timebase of 20 ns d e Press to select RANGE e Press 20 to select 20 ns d 10 Verify that the signal is well triggered if necessary adjust the trigger level see 7 11 Set the 5500A to source a 40 MHz leveled sine wave of 1 8V peak to peak 12 Verify that the signal is well triggered if necessary adjust the trigger level see 7 13 When you are finished set the 5500A to Standby 4 6 Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE 4 5 2 Input 1 Frequency Response Upper Transition Point Test Proceed as follows to test the Input 1 frequency response upper transition point 1 2 9o OA Connect the test tool to the 5500A as for the previous test see Figure 4 2 Select the AUTO test tool setup e Press to select the MENU
75. trigger level to 2 divisions from the screen center For negative slope triggering the trigger level is the bottom of the trigger icon 1 e Press to select TRIGGER e Using o set the trigger level to 2 divisions from the screen center 13 Verify that no trace is shown on the test tool display and that at the upper right corner of the display HOLD 18 not shown If the display shows HOLD then press Hold should disappear and the test tool is re armed for a trigger 14 Decrease the 5500 voltage slowly in 0 1V steps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown 15 Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test start at step 12 16 When you are finished set the 5500A to Standby 4 5 8 Input 1 and 2 DC Voltage Accuracy Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows 1 Connect the test tool to the 5500A in Figure 4 5 FLUKE 5500A CALIBRATOR 2 nine Pi 54 510 eW s Nee 25 lt gt 2 A M a PM9093 PM9091 001 1 5m 9092 001 0 5 Figure 4 5 Test Tool Input 1 2 to 5500 Normal Output ST8001 WMF 2 Select the AUTO test tool setup
76. turned on If valid software is present one of the three modes Operational Operational amp Charge or Charge will become active The Charger Converter circuit is active in the Operational amp Charge and in the Charge mode The Fly back converter is active in the Operational and in the Operational amp Charge mode Charger Converter See also Figure 3 3 The power adapter powers the Charge Control circuit in the P ASIC via an internal linear regulator The power adapter voltage is applied to R501 The Charger Converter circuit controls the battery charge current If a charged battery pack is installed VBAT is approximately 4 8V If no battery pack is installed VBAT is approximately 15V voltage VBAT is supplied to the battery pack to the P ASIC to the Fly Back Converter and to transistor V569 FET control signal CHAGATE is a 100 kHz square wave voltage with a variable duty cycle supplied by the P ASIC Control circuit The duty cycle determines the amount of energy loaded into L501 C503 By controlling the voltage VBAT the battery charge current can be controlled The various test tool circuits are supplied by the Fly Back Converter and or V569 Required power adapter voltage The P ASIC supplies a current to reference resistor R516 VADALOW pin 8 It compares the voltage on R516 to the power adapter voltage VADAPTER on pin 20 supplied via R502 and attenuated in the P ASIC If the power adapter voltage is below 10V
77. 0A to Standby 4 5 6 Input 2 Trigger sensitivity Test Proceed as follows to test the Input 2 trigger sensitivity 1 2 Connect the test tool to the 5500A as for the previous test shown in Figure 4 3 Select the AUTO test tool setup e Press NU to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode Make Input 2 active e Press to select menu SCOPE SETUP Press to select Input 2 READING e Press S to highlight AC DCrms e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 Coupling menu e Press S to highlight DC Coupling e Press to confirm L mark changes to Bl Press to return to SCOPE Select trigger on channel 2 e Short circuit Input 1 with a BB120 and a 50Q feed through piece e Set the 5500A to source a 5 kHz leveled sine wave of 100 mVpp NORMAL output MODE wave sine If necessary readjust signal amplitude to 0 5 div Select the following test tool setup e Press and select RANGE 2 e Press s to select 200A d e Press 20 to select a timebase of 50 us d Verify that the signal is well triggered if necessary adjust the trigger level see 7 Adjusting trigger level Press Press G to highlight TRIGGER e Press o to adjust Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE 8 Select timebase of 10 us d e Press to select RANGE e Press 20 to select 10 us
78. 0Hd H3MOd OL Sn amp WMdv 9153100 QHVOSA3X sna oavs 21705 Soll 10S 8 380ud E v 3808d 852000 3 Y onm 8 13S44O 215 kila T3NNVHO 5 7 Old 9 2 OXL s oav 8 00V dxu 3H l 33ONOHMd T SdO3H3 IVANIVW Sr WOO IVAHVOA 1705 2000 LOW x 17191A 91 udav WESEL Tvea 3SN3S 8920 OO vwi3sddo 2157 109161 y 13330 T3NNVHO voa vso snas 9 Nelt V I3NNVHO ST7965 EPS Figure 3 1 Fluke 43B Block Diagram 3 2 Circuit Descriptions 3 3 1 Introduction 3 1 Introduction Section 3 2 describes the functional block diagram shown in Figure 3 1 It provides a quick way to get familiar with the test tool basic build up Section 3 3 describes the principle of operation of the test tool functions in detail on the basis of the circuit diagrams shown in Figures 9 1 to 9 5 For all measurements input signals are applied to the shielded input banana jackets Traces and readings are derived from the same input signal samples 3 2 Block Diagram In the block diagram Figure 3 1 the test tool is divided in five main blocks Each block represents a functional part build up around an Application Specific Integrated Circuit ASIC A detailed circuit diagram of each block is shown in Section 9
79. 171 1 d l R305 T GNDREF T ASIC RUE 10K C301 GAINADCT ma 100n GAINADCB 000257 GAINADCT GAINPWM VCCSRAMP F5 V172 REFADCT BCV65 Mose REFADCB VEERAMP G5 REFPWM 16 B 7 DACTESTT 29 DACTEST RSTRAMP cud o E R271 zB 9 E cai TP309 555 5 938 5 310E mH 5VA VCC5REF gx 2 2 322 n 5816 m LE D8 10u GEOSSOPSZEOR R371 CE VCCSDT D11 al c0 ex 109 109 00 C382 100 R302 R310 SDAT RAMPCLK 10K 100K 4 17 5 Z SCLK IS TRIGDT R376 gt gt gt D11 En ALLTRIG TRACEROT 1 10 R385 VCC3DT 5 2 810 pia gt pni g g TP311 VCC3RAMP _ D11 GAINREFN VCC3REF pg TP306 TP336 E9 REFPWM2 5 7 HOLDOFF C377 C376 REFP gt C344 C337 100n 100n 100n 100n 100 R307 22 4 7 TP304 TP307 10K R339 SMPCLK R393 REFPWM1 Dn VEEATR 5 J7 TOE C9 d 7 557 C339 R394 C317 1p 1E VEEDT D11 22u 12 R311 MOOR C312 r amp 301 FR V302 TP338 3V3A R395 VEERAMP 34K8 31K6 100n 4041 4041 BO gt CoE 7 1 11 R342 TRIGQUAL VEEREF GAINPWM lt EE C391 C392 C10 108 C342 R398 VEECML V301 OR V302 is placed 1 100n I 10u p 1 E9 2x I era See Ch 10 Rev 3 C398 C397 al C396 C394 C393 T T T 100 p 100 C REF_BUS 1010 t F4 DTRG BUS 2 010
80. 1759 4822 117 10833 5322 117 12476 5322 117 12448 4822 117 10833 5322 117 12466 5322 117 12469 4822 117 11373 4822 117 11373 4822 117 10837 4822 117 10837 4822 117 10837 4822 117 10837 5322 117 11725 5322 117 12452 5322 117 12469 4822 117 10833 8 8 21 43 Service Manual Reference Description Ordering Code Designator 8 22 R603 RESISTOR CHIP RC12H 1 100K 4822 117 10837 R604 RESISTOR CHIP RC12H 1 1 4822 117 11154 R605 SMD RES 10K 1 TC50 0805 4022 301 22071 R606 SMD RES 6K19 1 TC50 0805 4022 301 22021 T552 BACKLIGHT TRANSFORMER PT73458 5322 146 10447 T600 SMD TRANSFORMER 678XN 1081 5322 146 10634 V171 PNP NPN TR PAIR BCV65 5322 130 10762 V172 PNP NPN TR PAIR BCV65 5322 130 10762 V174 PNP NPN TR PAIR BCV65 5322 130 10762 V200 LF TRANSISTOR BC848C PEL 5322 130 42136 V201 LF TRANSISTOR BC848C PEL 5322 130 42136 V301 PREC VOLT REF LM4041CIM 1 2 2X4 PIN DIL PACK 5322 209 14852 V302 PREC VOLT REF LM4041CIM3X 1 2 4022 304 10571 V353 VOLT REG DIODE BZD27 C7V5 PEL 4822 130 82522 V354 VOLT REG DIODE BZD27 C7V5 PEL 4822 130 82522 V356 LF TRANSISTOR BC858C PEL 4822 130 42513 V358 LF TRANSISTOR BC868 PEL 5322 130 61569 V359 LF TRANSISTOR BC868 PEL 5322 130 61569 V395 LF TRANSISTOR BC848C PEL 5322 130 42136 V401 N CHAN FET BSN20 PEL 5322 130 63289 V402 P CHAN MOSFET BSS84 PEL 5322 130 10669 V403 N CHAN FET BSN20 PEL 5322 130 63289 V471 SIL DIODE BAS85 4822 130 82334 V495 P CHAN MOSFET
81. 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator 5322 122 32452 5322 122 32268 5322 126 10223 5322 126 10511 5322 126 14486 5322 122 34098 4822 122 33128 5322 122 32654 5322 126 10511 5322 122 33538 5322 122 32531 5322 126 13638 5322 122 32287 5322 124 11837 5322 126 13638 5322 124 11837 5322 126 13638 5322 126 13638 5322 124 11837 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 14483 5322 126 14483 5322 126 14484 5322 126 14485 5322 126 14484 5322 126 14484 5322 126 14483 5322 126 13638 5322 126 13638 5322 126 13638 8 43 Service Manual Reference Description Ordering Code Designator C311 CER CHIPCAP 25V 20 100NF 5322 126 13638 C312 CER CHIPCAP 25V 20 100NF 5322 126 13638 C313 ALCAP SANYO 25V20 10UF 5322 124 11838 C314 ALCAP SANYO 25V 20 10UF 5322 124 11838 C317 ALCAP NICHICON 6 3V 20 22UF 4822 124 80675 C321 CER CHIP CAP 63V 10 1 5NF 5322 122 31865 C322 CER CHIP CAP 63V 10 1 5NF 5322 122 31865 C331 CER CHIP CAP 63V 0 25PF 4 7PF 5322 122 32287 C332 CER CHIP CAP 63V 5 22PF 5322 122 32658 C333 CER CHIP CAP 63V 0 25PF 1PF 5322 122 32447 C337 CER CHIP CAP 63V 0 25PF 4 7PF 5322 122 32287 C339 CER CHIP CAP 63V 0 25PF 1PF 5322 122 32447 C342 CER CHIP CAP 63V 0 25PF 1PF 5322 122 32447 C344 CER CHIP CAP 63V 5 22PF 5322 122 32658 C356 MKPS FILM CAP 25V 10 15NF 5322 121 108
82. 34 C357 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C376 CER CHIPCAP 25V 20 100NF 5322 126 13638 C377 CER CHIPCAP 25V 20 100NF 5322 126 13638 C378 CER CHIPCAP 25V 20 100NF 5322 126 13638 C379 CER CHIPCAP 25V 20 100NF 5322 126 13638 C381 CER CHIPCAP 25V 20 100NF 5322 126 13638 C382 CER CHIPCAP 25V 20 100NF 5322 126 13638 C391 CER CHIPCAP 25V 20 100NF 5322 126 13638 C392 ALCAP NICHICON 16V 10UF 5322 124 41979 C393 CER CHIPCAP 25V 20 100NF 5322 126 13638 C394 CER CHIPCAP 25V 20 100NF 5322 126 13638 C395 CHIPCAP NPO 0805 5 1NF 5322 126 10511 C396 CER CHIPCAP 25V 20 100NF 5322 126 13638 C397 CER CHIPCAP 25V 20 100NF 5322 126 13638 C398 CER CHIPCAP 25V 20 100NF 5322 126 13638 C399 CER CHIPCAP 25V 20 100NF 5322 126 13638 C400 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C401 CER CHIP CAP 63V 0 25PF 4 7PF 5322 122 32287 List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator C402 C403 C404 C407 C408 C409 C416 C431 C432 C433 C434 C436 C438 C439 C441 C442 C451 C452 C453 C457 C458 C463 C464 C465 C466 C470 C471 C472 C473 C474 C475 C476 C479 C480 CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 63V 5 470PF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 10 22NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 10 22NF CHIPCAP X7B 0805 10 22NF CAP 5 1206 10 1UF CER CHIP CAP 6
83. 36 if at a fixed level replace D531 TP537 if not correct trace signal to PWM circuit on the Digital part TP534 if at a fixed level replace N531 r A lll 4 536 TP537 534 0 5V ov 7 lt 500 ms 7 5 4 Keyboard Proceed as follows if one or more keys cannot be operated 1 Replace the key pad and the key pad foil to see if this cures the problem 2 Press key and check ROWO 5 measure spots MS432 MS437 for the signal shown below Press key i250 ms ieee us pulses Release key If no key is pressed the ROW lines are low if a battery is installed if the 43 is powered by the the mains adapter only the lines are alternating pulsing and low 3 Check COLO 3 measure spots MS438 MS441 for a 3 3V level Then press and hold a key and check the matching COL line for the signal shown below Press key i 50 ms ie us pulses Release key If not correct check the connections from X452 to D471 replace D471 For the ON OFF key see 7 5 13 Corrective Maintenance 7 7 5 Miscellaneous Functions 7 5 5 Optical Port Serial RS232 Interface Receive RXD 1 Check the voltage RXDA on TP522 for 200 mV and the voltage RXD on 527 buffered and amplified RXDA voltage for 3 3V 2 Shine with a lamp in the optical port H522 Check the voltage RXDA on TP522 for 0 0 6V and RXD on 527 for Send TXD
84. 3V 10 4 7NF CER CHIP CAP 63V 10 4 7NF CHIPCAP X7B 0805 1096 22NF CHIPCAP X7B 0805 1096 22NF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF ALCAP NICHICON 16V 10UF CER CHIPCAP 25V 20 100NF CER CHIP 470 PF 5 0805 NPO 50V CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER 100NF 10 0805 NPO 50V CER CHIP CAP 63V 5 22PF CER CHIPCAP 25V 20 100NF 5322 126 13638 5322 126 13638 5322 122 32268 5322 126 13638 5322 126 13638 5322 122 32654 5322 126 13638 5322 126 13638 5322 126 13638 5322 122 32654 5322 122 32654 5322 126 14089 5322 126 10223 5322 126 10223 5322 122 32654 5322 122 32654 5322 122 32287 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 124 41979 5322 126 13638 4022 301 60371 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 4022 301 61331 5322 122 32658 5322 126 13638 8 43 Service Manual Reference Description Ordering Code Designator C481 CER CHIP 63V 5 22PF 5322 122 32658 482 CER CHIP CAP 63V 5 22 5322 122 32658 483 CER CHIP 63V 5 22 5322 122 32658 484 CER CHIP 63V 5 22 5322 122 32658 485 CER CHIP 63V 5 27PF 5322 122 31946 C486 C
85. 407 L L C408 17 LCDAT3 LEDATS MS418 DEBUGS 47 BYTE ais i A15 EE 100n 100 F 100 16 LEDAT2 qe 5417 T R467 4 cass 8 2 ROM A14 er 9 5416 4 1E 10u ROM 0157 45 5 1 9 ROM A13 ROM A19 TO 14 ECDATI LCDAT 5415 ROM 007 44 4 12 ILCD 13 LCDATO B MS414 ROM Di 4 43 Dor R 5 ROM A11 MODULE 2 N gMS413 ROM D06 42 Dos ato 5 ROM A10 1401 6 2 22 11 I LINECLK LINECLK 5412 ROM Df3 41 pQ13 o 7 ROM A09 o B VDDA VDDD VDDO 59 _14 ADC_A_DO i 19 I FRAME FRAME MAT ROM D05 40 A8 8 A08 bid rore 0 5 vin D1 15 ADC_A 01 pit M rai 3V3GAR _ 15 516 ap 29 DQ12 Alp 4 DEBUG1 a REFADCT 8 vRT Ds 17 ADC A D3 7 j LCDTEMP1 LCDTEMP1 5408 37 pee wis 11 ROMWRITE 1403 DEBUG2 C401 D401 D4 18 ADC_A D4 8 Q 9VA 5 816 5 B16 SVA gMS406 C471 L C412 1 0473 C474 476 RP 72 ROMRST P lt 4p7 L C402 9 vRM ps 19 ADC D5 I 5 33 30 5 B16 5 16 33V3D 4 5405 100n 100 100n 100n 100n ROM D 38 pQ11 100n 20 ADC A D6 4 REFPWM REFPWM 4 5404 ROM 03 35 13 0 De TS 3 CONTRAST CONTRAST 2 E DQ3 135 0 2 REFADCB 10 vRB TDA 8792 p L 21 ADC A D7 4 MS403 ROM ADDR ROM 010 34 pQ10 wp 14 VD R488 MS402 ROM DO2 33 pQ2 RY 15 T l C403 7 REF 24 SMPCLK i 1 30 0 5 C16 5 16 amp 30VD a MS401 L C
86. 453 RESISTOR CHIP RC12H 1 21K5 5322 117 12477 R454 RESISTOR CHIP RC12H 1 5322 117 12472 R466 RESISTOR CHIP RC12H 1 5322 117 12472 R467 RESISTOR CHIP RC12H 1 5322 117 12472 R469 RESISTOR CHIP RC12H 1 100 4822 117 10837 R470 RESISTOR CHIP RC12H 1 OE 5322 117 12471 R471 RESISTOR CHIP RC12H 1 1M 4822 117 11948 R472 RESISTOR CHIP RC12H 1 1M 4822 117 11948 R473 RESISTOR CHIP RC12H 1 100E 4822 117 11373 R474 RESISTOR CHIP RC12H 1 100E 4822 117 11373 R478 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R479 RESISTOR CHIP RC12H 1 51K1 5322 117 12462 R480 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R482 SMD RES 511E 1 TC100 0805 4022 301 21761 R483 SMD RES 51K1 1 TC100 0805 4022 301 22241 R485 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R486 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R489 RESISTOR CHIP RC12H 1 OE 5322 117 12471 R491 RESISTOR CHIP RC12H 1 51K1 5322 117 12462 R495 RESISTOR CHIP RC12H 1 3K16 5322 117 12465 R496 RESISTOR CHIP RC12H 1 3K16 5322 117 12465 R497 RESISTOR CHIP RC12H 1 OE 5322 117 12471 R499 SMDRES 56K2 1 TC100 0805 5322 117 13494 R501 RESISTOR CHIP LRCO1 5 0 1 5322 117 11759 R502 RESISTOR CHIP RC12H 1 10 5322 117 12464 R503 RESISTOR CHIP RC12H 1 10E 5322 117 12464 R504 RES 01 1206 5 1E 4822 117 11151 R506 RES 01 1206 5 4822 117 11151 8 20 R507 R508 R509 R512 R513 R514 R516 R524 R527 R528 R529 R531 R532 R534 R535 R550 R551 R552 R553 R554 R555 R558 R559 R561
87. 475 ROM 09 22 Bas Ate 16 ROM A18 100 100 d 100n ROM D01 31 17 ROM A17 ROM A19 HB her BUS VSSA2 VSSA1 STBY Nc vssp vsso CEN l LCOTEMBI LCD BUS ROMADDR ROM DATA ROM D08 30 Dos AN 38 ROM A07 2 4 h op gm PE REF BUS e 5EEBesesbssez csexee esseesssE geese ROMREAD 38 000 AS O ROM AG R488 0 Ohm for 1 3 H8 E RiGee 8mm SISISISISIS R222 2909 969 27 05 5 57 ROM 04 Intel 16 9 QE s s s s s s s s czzz2222222225z Tzzzzzz25 GND 4 gt 4E10 MIDADC A F1 CONTRAST 2120690 gt lt 8566660605650 60 0665065656566665660 2000655656 ROM CS0 26 cE 22 ROM A03 LE T0 ADCA BUS pin FRAME sP S x x x x x e e x x x x x L 0 x x x x z x X x x 4455335 ROM A00 25 ag A2 23 ROM 02 lt 24 ROM A01 DTRG BUS a a A124 F BH13J Uu 9 E z ROM_A03 ROMWRITE p SMEGLK eo lo x le le e lo e e le le o l lo ix Jon ez Ie e o e ele r eo lo leo e le le s RRRRRR RRRA aq ADDR 432 RAMPCLK LY osuxermpoagr VITO SPOS PANN THON ORT OH BATE DORSABRPQO Tis 272254552924555225235552 9 222522222 22022 922 52554 u TRIGDT 225999 gz S 52 9 Z Z 9 9 0990999990999090 8889888 Direct connection for PCB version 3 D APWM BUS COE 566 x i TP4 cuit for PCB version 3 PWM
88. 5 Hz 1210900 ice eit rn et iE 5 45 065 Hz 1 10 207 q E NSS a 5 of reading 0 3 A 20406 OO er ett rete trie pe e pei bau a 5 of reading 3 phase shift 2 of reading 5 phase shift 65 Hz to 3 kHz 1 10 50 etai e rabo pere ded ada 5 0 4 A 50 t0 500 AS a te tet red erts eie roi e te ree aka edt 5 Influence of temperature on accuracy 0 15 per 10 C 18 F Altitude fete eee da eee Peleo Y sassa 2 0 km 6560 feet MWhile Stoted i ie eee te aaa 12 km 40 000 feet 2 6 Environmental Conditions Environmental 2 MIL 28800 3 Class III Style B Temperature During operatioti de eet de dte itte e tee 0 to 50 C 32 to 122 F While stored imo Beo Ee Sem 20 to 60 C 4 to 140 F Humidity During operation 0 to 10 C 32 to 50 0000 00000005201 non condensing 10 t0 30 C 50 0 862 tenders 95 5 30 10 40 C 86 1o KO D ient eei tree eate eate e pete agua 75 5 40406 50 SG 104 t0 122 N 45 5 While stored 20 10 60 C AAO TAO SE entes tede teres non condensing Altitude During op eratioli s act ce ette ed eet 4 5 km 15 000 feet The maximum input and floating voltage is
89. 5 Miscellaneous Functions 7 3 Charger Circuit l 2 Power the test tool by the power adapter only Check TP501 for z15 20V If not correct check the power adapter input circuit X501 Z501 V501 C501 Check TP504 VBAT for about 7 5V If not correct check R501 V504 V503 L501 C503 Check TP502 for a 100 kHz 13Vpp pulse signal if not correct or low check if TP504 15 shorted to ground and check 506 Install a charged battery The voltage at TP504 will be now about 5V Check N501 pin 18 P7VCHA for z7V If not correct check N501 pin 20 for z15V supplied via R502 If 15V on pin 20 is correct check C507 replace N501 P7VCHA is the supply voltage for the charger control circuit in N501 It is derived from VADAPTER pin20 by an internal linear supply in N501 Check N501 12 NETVALID for 2 7V and TP529 MAINVAL for 3 3V The NETVALID and MAINVAL signals indicate to the P ASIC and the D ASIC that a correct power adapter voltage is connected The signals enable control of the P ASIC CHARGE circuit controls V506 by 100 kHz 13Vpp square wave If correct continue at step 7 Corrective Maintenance 7 3 Charger Circuit If not correct then a Check TP571 3V3GAR for 3 If not correct possibly caused by V569 R580 TP571 short to ground loose pins of N501 N501 defective Check N501 pin 8 VADALOW for 1 1V If not correct 1 Check R516 and connections The P AS
90. 50 60 49 40 to 50 60 D The 500V and 1250V range will be tested in Section 4 5 14 4 5 10 Input 1 and 2 AC Input Coupling Test Proceed as follows to test the Input 1 and 2 AC coupled input lower transition point 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 2 Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 3 Select AC coupling amp reading for Input 1 and 2 e Press to select menu SCOPE SETUP Press to select Input 1 READING Press S to highlight ACrms e Press to confirm L mark changes to Bl e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight AC Coupling e Press es to confirm L mark changes to Press select Input 2 READING Press to select the Input 2 READING e Press S to highlight ACrms e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling 4 19 43 Service Manual e Press to select the Input 2 COUPLING Press S to highlight AC Coupling e Press to confirm L mark changes to e Press to return to SCOPE 4 Set the 5500A to source an AC voltage to the first test point in Table 4 4 NORMAL output WAVE sine 5 Observe the Input 1 and Input 2 main reading and check to see if it is within the range shown under the appropriate column Continue t
91. 6 11436 display shielding bracket 5322 402 10204 display assembly 5322 135 00029 keypad 5322 410 11952 keypad foil 5322 276 14006 ON O A keyboard pressure plate 5322 466 10963 combiscrew M3x10 5322 502 21507 bottom case 5322 442 00273 ae N combiscrew M3x10 5322 502 21507 battery pack BP120 battery door 5322 443 10237 combiscrew M3x10 5322 502 21507 bail 5322 466 10975 gt main unit assembly firmware loaded 5322 216 04605 Not calibrated Note The test tool contains a Nickel Cadmium battery item 13 Do not mix with the solid wastestream Spent batteries should be disposed of by qualified recycler or hazardous materials handler 8 List of Replaceable Parts 8 3 Final Assembly Parts ST8562 WMF Figure 8 1 Fluke 43B Final Assembly 8 5 43 Service Manual 8 4 Main PCA Unit Parts See Table 8 2 and Figure 8 2 for the Main PCA Unit parts Table 8 2 Main PCA Unit 1 screw M2 5x5 5322 502 21206 combiscrew M3x10 5322 502 21507 insulator for power input 5322 325 10163 main PCA shielding box 5322 466 10976 guide piece for optical gate LEDs 5322 256 10201 main PCA shielding plate 5322 466 10964 screw M2 5x16 5322 502 14132 OO N O Q CO N O ring 17 mm Input A B 5322 530 10272 O ring 12 mm COM input 5322 530 10273 Note If the main P
92. 8 C609 C610 D401 D451 D471 D474 D475 ELCAP 10V 20 390UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF SANYO 35V 20 47UF ALCAP SANYO 6 3V 20 150UF SANYO 6 3V 20 150UF SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 25V 20 47 CER CHIPCAP 25V 20 100NF CER CAP 5 1206 10 1UF CHIPCAP NPO 0805 5 1NF CER CHIPCAP 25V 20 100NF CHIPCAP X7R 0805 10 10NF MKT FILM CAP 63 10 100NF CER CAP 2KV 5 33PF CER CAP 5 1206 10 1UF LOW VOLT TDA8792M C2 R1 LOW VOLT ADC TDA8792M C2 R1 D ASIC MOT0002 8M FEPROM AM29LV800B 120EC K6T4008V16 RAM 512 x 8 List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator 5322 124 11844 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11842 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 14045 5322 126 13638 5322 126 14089 5322 126 10511 5322 126 13638 5322 122 34098 5322 121 42386 5322 126 14047 5322 126 14089 5322 209 14837 5322 209 14837 5322 209 13139
93. 87 4822 051 51001 8 43 Service Manual Reference Description Ordering Code Designator R137 RESISTOR CHIP RC 02H 1 56K2 5322 117 10574 R138 RESISTOR CHIP RC 02H 1 56K2 5322 117 10574 R139 RESISTOR CHIP RC 02H 1 56K2 5322 117 10574 R140 RESISTOR CHIP RC 02H 1 56K2 5322 117 10574 R141 RESISTOR CHIP RC12G 1 215K 5322 117 12488 R142 RESISTOR CHIP RC12G 1 147K 5322 117 12489 R143 RESISTOR CHIP RC12G 1 909K 5322 117 12491 R144 RESISTOR CHIP RC12H 1 348E 5322 117 12456 R146 RESISTOR CHIP RC12H 1 215K 5322 117 12457 R151 RESISTOR CHIP RC12H 1 100K 5322 117 12458 R152 RESISTOR CHIP RC12H 1 100K 5322 117 12485 R153 RESISTOR CHIP RC12H 1 681K 5322 117 12485 R154 RESISTOR CHIP RC12H 1 681K 5322 117 12458 R155 RESISTOR CHIP RC12H 1 178K 5322 117 12459 R156 RESISTOR CHIP RC12G 1 100K 5322 117 12485 R157 RESISTOR CHIP RC12H 1 348E 5322 117 12456 R158 RESISTOR CHIP RC12H 1 287E 5322 117 12461 R159 RESISTOR CHIP RC12H 1 100E 4822 117 11373 R160 RESISTOR CHIP RC12H 1 51K1 5322 117 12462 R161 RESISTOR CHIP RC12G 1 100K 5322 117 12485 R165 RESISTOR CHIP RC12H 1 100E 4822 117 11373 R171 RESISTOR CHIP RC12H 1 348E 5322 117 12456 R172 PTC THERM DISC 600V 300 500E 5322 116 40274 R173 RESISTOR CHIP RC12H 1 348E 5322 117 12456 R182 RESISTOR CHIP RC12H 1 10E 5322 117 12464 R184 RESISTOR CHIP RC12H 1 10E 5322 117 12464 R186 RESISTOR CHIP RC12H 1 10E 5322 117 12464 R188 RESISTOR CHIP RC12H 1 10 5322 117 12464 R189 RESISTOR CHIP RC12H
94. 9 gt 128X8 SRAM E VDDREFB RAMA10 V401 vaos 404 SADCLEVD 39 PWMB10N0 RAMA11 118 RAM A11 512 8 SRAM G BSN20 BSN20 5470 CHARCURD 40 RAMA12 117 RAM A2 qeu FRAME L le 1 CONTRAST C464 ot Bii VD vcLAMPB RAMA13 116 Y R497 FRAME ik FS 12 5 a 100n ADC_B_D7 42 115 14 REF BUS ADCB7 RAMA14 OE B11 1 x R410 3 H8 B 06 43 ADCB6 vss 14 68E1 ADC_B_D5 44 T3 l R407 B ADCB5 VDD B11 R498 3K16 Bus ADC_B_D4 45 ADCB4 RAMA15 112 15 18 EE 811 VD 46 RAMAt6 111 RAM A16 100n L vss gAMA 17 110 RAM 17 ADC 8 D2 4s 0 RAMAS Hos RXD2 rum B ADCB2 RXD2 ADC B 01 50 1 TXD2 107 TXD2 MS447 5 16 30VD ADC DU 51 106 ADCB0 EMUL C409 NC 52 wc ey e NC 105 NC R498 R497 SUPPRDET s l 128x8 open 0 Ohm H 22n 12 m Oz COLO o886 i fie Sonn zzzzzz SEO X im open R471 R472 PTIEEPTIEFFEFEEFUEPLEEEEIPEPEUECEEEEUELUPTEEPEPEPPPPPPPPYSA s 4M 4M Zaanook ccrcxr 220000000kk 25225200 252r cCc amp R 5u zdBuiu 290000000 z CADC CHANNEL BI ERE RE SSEE RRS eepe egee dus di E Bi Posse SS s s VDDDB S ings PROBE A z 3 55r i o 10K i VD R485 R486 for electronic
95. ADC enables the D ASIC to measure the following signals BATCUR BATVOLT BATTEMP BATIDENT Battery current voltage temperature type DACTEST A DACTEST B and DACTEST T test output of the C ASIC s and the T ASIC De multiplexer D531 supplies one of these signals to its output and to the input of comparator N531 536 The D ASIC supplies the selection control signals SELMUXO 2 The Slow ADC works according to the successive approximation principle The D ASIC changes the SADCLEV signal level and thus the voltage level on pin 3 of the comparator step wise by changing the duty cycle of the PWM signal SADCLEVD The comparator output SLOWADC is monitored by the D ASIC who knows now if the previous input voltage step caused the comparator output to switch By increasing the voltage steps the voltage level can be approximated within the smallest possible step of the SADCLEV voltage From its set SADCLEVD duty cycle the D ASIC knows voltage level of the selected input RS232 The optical interface enables serial communication RS232 between the test tool and a PC or printer The received data line RXDA P ASIC pin 75 is connected to ground via a 20 resistor in the P ASIC If no light is received by the light sensitive diode H522 the RXDA line is 200 mV which corresponds to a 1 43V on P ASIC output pin 76 line If light is received the light sensitive diode will conduct and the RXDA line goes
96. ADING e Press to select the Input 2 READING e Press S to highlight ACrms e Press to confirm L mark changes to Bl e Press S to highlight Input 2 Coupling e Press to select the Input 2 COUPLING e Press S to highlight DC Coupling e Press to confirm L mark changes to Press to return to SCOPE Select the appropriate sensitivity for the test tool Press to select RANGE 1 or RANGE 2 e Press to select RANGE 1 or e Press to select RANGE 2 e Press S to select the ranges mentioned in the second part of table 4 7 Set the 5500A to source the appropriate AC voltage NORMAL output WAVE sine Performance Verification 4 4 6 Ohms Continuity Capacitance 11 Observe the Input 1 and 2 main reading AC and check to see if it is within the range shown under the appropriate column 12 Continue through the test points of table 4 7 13 When you are finished set the 5500A to Standby Table 4 7 V DC and V AC High Voltage Verification Tests Sensitivity Time 5500A Reading DC Reading AC div Frequency orse e Corse mw e 500V d 500kA d 10 ms d 600V DC 0 592 to 0 608 Troma amv be oseo gt Continue at test point 8 7777 osseo 0894109 _ mw wwe 4 6 Ohms Continuity Capacitance 4 6 1 Resistance Measurements Test Proceed as follows 1 Connect the test tool to t
97. Also verify that the contrast of the upper left and upper right square of the test pattern are equal Press The test pattern 1s removed the test tool shows Contrast CL 0120 MANUAL Press CAL The test tool shows a light display the test pattern as shown in Figure 4 1 may not be visible or hardly visible Observe the display closely and verify that no dark pixels are shown Press 0 twice to turn the test tool OFF and ON to exit the calibration menu and to return to the normal operating mode 4 5 Input 1 and Input 2 Tests in the SCOPE MODE Before performing the Input 1 and Input 2 tests the test tool must be set in a defined state by performing a RESET Proceed as follows to reset the test tool Press D to turn the test tool off Press and hold E s Press and release D to turn the test tool on Wait until the test tool has beeped twice and then release E When the test tool has beeped twice the RESET was successful Now you must select the SCOPE MODE Press to leave the STARTUP screen Press Press up down till is highlighted Press to select SCOPE mode 4 5 43 Service Manual 4 5 1 Input 1 Trigger Sensitivity Test Proceed as follows to test the Input 1 trigger sensitivity 1 Connect the test tool to the 5500A as shown in Figure 4 2 FLUKE 5500A CALIBRATOR ST8004 WMF Figure 4 2 Test Tool Input 1 to 5500A Scope Output 500 2 Select the AUTO test
98. B REF BUS 3 H8 REFN DACTESTB 5 J2 ADC_B 4M C261 100n MIDADC B 4 41 TRIG B 3 C1 C262 4p7 TRACEROT 3 F13 SDAT 4 17 SCLK 4 17 8578555 980722 ST8555 WMF Channel 2 Circuit Circuit Diagrams 9 2 Schematic Diagrams 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 F10 ISAL GENOUT R354 R356 V356 BC858 C C356 4 A11 357 22 5 TRIGGER FILTER V353 R352 TP308 DLL se MEM 21 ANE BZD27 I pnus R oe ease VCG3ATR RELAY L K TVOUT CONTROL V354 A R353 F gt I 1 Esa d e p ss BZD27 C399 GINS TRIGLEV2 100 1 E10 m le I 9 I R399 681K 1 10 10K E TRIG B gt REF_BUS 2E10 w ajs la Els 98 T eg E B R326 ERI S EF REFPWM1 562K o wel else Rago 2 gt sus 26K1 I TP301 52 5 8500 wesw aos RET S vcc3sarR 17 VCCSATR or FS vam GNDDISTR Bias 18 BIAS BCV65 GAINREFN GAINREFN 24 R301 REFN REFN ACDCA 22 ACDCA H T ES REFP REFP acoce 23 EUN E tol 1 j REFADCT VCC5REF VCC5DT ES i REFERENCE VCC3REF N301 vccapr 25 F5 R171 GAIN VEEREF VEEREF VEEDT 21 VEEDT G5 348E K
99. C system clock For the real time clock counting the time and date an additional 32 768 kHz crystal B401 is provided When the test tool is turned on a 16MHz microprocessor clock derived from B402 becomes active Buzzer The Buzzer is directly driven by a 4 kHz square wave from the D ASIC pin 101 via FET V522 If the test tool is on the 30VD supply from the Fly Back converter is present and the buzzer sounds loudly If the 30VD is not present the buzzer sounds weak e g when the Mask Active mode is entered Chapter 4 Performance Verification Title Page Ai IntrodUctlofixc sione tautan a usuta a pte eerie 4 3 4 2 Equipment Required For 1 1 22 2 00 0 100000 0000000 0000054 4 3 AS How yay an rette Certo eoe Ue e CIS 4 3 4 4 Display and Backlight Test aa 4 4 4 5 Input 1 and Input 2 Tests in the SCOPE MODE 4 5 4 5 1 Input 1 Trigger Sensitivity 4 6 4 5 2 Input 1 Frequency Response Upper Transition Point Test 4 7 4 5 3 Input 1 Frequency Measurement Accuracy Test 4 7 4 5 4 Input 2 Frequency Measurement Accuracy Test 4 9 4 5 5 Input 2 Trigger Level and Trigger Slope Test 4 10 4 5 6 Input 2 Trigger sensitivity Test
100. C12H 1 10 4822 117 10833 R308 RESISTOR CHIP RC12G 1 21K5 5322 117 12492 R309 RESISTOR CHIP RC12H 1 10 4822 117 10833 R310 RESISTOR CHIP RC12H 1 100K 4822 117 10837 R311 RESISTOR CHIP RC12H 1 31K6 5322 117 12466 R312 RESISTOR CHIP RC12H 1 34K8 5322 117 12467 R321 RESISTOR CHIP RC12H 1 681K 5322 117 12458 R322 RESISTOR CHIP RC12H 1 681K 5322 117 12458 R323 RESISTOR CHIP RC12H 1 34K8 5322 117 12467 R324 RESISTOR CHIP RC12H 1 215 5322 117 12457 R326 RESISTOR CHIP RC12H 1 562 5322 117 12468 R327 RESISTOR CHIP RC12H 1 562 5322 117 12468 R331 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R333 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R337 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R339 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R342 RESISTOR CHIP RC12H 1 10K 4822 117 10833 R352 R353 R354 R356 R369 R371 R375 R376 R377 R378 R381 R385 R393 R394 R395 R396 R397 R398 R399 R403 R404 R405 R406 R407 R408 R409 R410 R416 R417 R431 R432 R433 R434 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RES
101. CA must be replaced you must order the complete Main PCA Unit ST8015 WMF Figure 8 2 Main PCA Unit 8 6 8 5 Main Parts See Figures 9 7 9 10 at the end of Chapter 9 for the Main PCA drawings 1 2 3 X100 B401 B402 B403 C101 C102 C104 C105 C106 C107 C111 C112 C113 C114 C116 C117 C118 C119 C121 C122 C123 C124 C131 C132 Table 8 3 Main PCA Reference Description Ordering Code Designator Led Holder for H521 and H522 Screw for Input Banana Jack Assembly Input Banana Jack Assembly without Input A B and COM O rings see Figure 8 2 QUARTZ CRYSTAL 32 768KHZ SEK QUARTZ CRYSTAL 16 0MHZ KDK QUARTZ CRYSTAL 25 0MHZ KDK MKC FILM 630V 10 22NF SUPPR CAPACITOR 0 1 UF CER CAP 3 15KV 5 120PF ALCAP NICHICON 16V 10UF CER CAP 1KV 20 80 4 7NF CER CHIP CAP 63V 5 470PF CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V 0 25PF 4 7PF 0 25PF 4 7PF 0 25PF 4 7PF 0 25PF 4 7PF 0 25PF 4 7PF 2 10PF 0 25PF 4 7PF 0 25PF 4 7PF 2 33PF 0 25PF 4 7PF 0 25PF 4 7PF 2 33PF CER CHIP CAP 63V 0 25PF 0 82PF CER CHIP CAP 63V 0 25PF 4 7PF List of Replaceable Parts 8 5 Main PCA Parts 5322 255 41213 5322 502 14362 5322 264 10311 5322 242 10302 5322 242 10573 5322 242 10574 5322 121 10616 5322 121 10527 5322 126 14046 5322 124 41979
102. CHARCURRECE Uz 22 20 8 oru gt R513 R514 R516 1 ano 6 faa gt 6 2 42 26 1 3K16 23K7 534 o C553 F 1000 Eee xk ees 85 8 ele ela T G i 8 FREQPS 4 4 313 9 5 lt Pee 5 2 528 aaa X wie le n R524 PWRONOFF R535 100 4 313 ei 51K1 TP527 7 RXD w 4 713 ee Meat R528 L C529 TXD 413 i 34K8 100 SLOW ADC n UE L cs28 14 114 220 BACKLIGHT CONVERTER is s a SADC_BUS T 6 L600 ceo9 D5 BAT 2 T 0 90 1 veo2 L C602 I T HV OUTPUT s TP591 592 Te 5531 3 F8 lt l ZX MBRS340 P 47n 14 TO LCD MODULE 4051 eos r sal SELMUX0 vccli _ 3V3SADC Q MS454 SELMUX1 10154 GND 8 x SELMUX2 9152 TP536 N531 TP534 TP603 NC 2 Ble LMC7101 o V601 7 NC 4 J N600 9 DF3N02 605 V603 B5 BATIDENT 13 3 4 2 _ gt BOUT GND 18 3 BC858 C A BAS16 BATVOLT 14 1 6 SLOWADC C603 AOUT Y1 8 9 100E C583 R529 R527 100 3 PGND 14 C608 L E 3V3D BATTEMP 15 3 100 261K 147E COUT ed 1000 BATCUR 32 5 91 yL20 I TP600 1H 4 COMP ENBL 13 T wm 5 010 DACTESTA T v4 522 T TP521 w 55 vec 12 Mee 2 010 PACTESTB 5 y5 IF 531 5230 C532 o 7 NIC REF 49 NC gt DACTESTT 2 22n 3 8 gt LCDTEMP1 u Y6 605 C604 8 I
103. ER CHIP CAP 63V 5 27PF 5322 122 31946 C487 CHIPCAP 0805 5 100PF 5322 122 32531 488 0805 5 100 5322 122 32531 489 X7B 0805 10 22 5322 122 32654 500 1UF CERCAP Y5V 1206 10 5322 126 14086 501 25V 20 1800 5322 124 11843 502 ALCAP NICHICON 25V 20 10UF 5322 124 11839 C503 ELCAP 10V 20 390UF 5322 124 11844 C504 ALCAP NICHICON 16V 10UF 5322 124 41979 C505 CER CHIPCAP 25V 20 100NF 5322 126 13638 C506 CER CHIP CAP 25V 20 47NF 5322 126 14045 C507 CER CHIPCAP 25V 20 100NF 5322 126 13638 C509 CER CAP 5 1206 10 1UF 5322 126 14089 C511 CER CHIPCAP 25V 20 100NF 5322 126 13638 C512 CER CHIPCAP 25V 20 100NF 5322 126 13638 C528 ALCAP NICHICON 6 3V 20 22UF 4822 124 80675 C529 CER CHIPCAP 25V 20 100NF 5322 126 13638 C531 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C532 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C534 CER CHIPCAP 25V 20 100NF 5322 126 13638 C547 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C548 CHIPCAP X7B 0805 10 22NF 5322 122 32654 C549 CHIPCAP X7B 0805 1096 22NF 5322 122 32654 C550 CER CHIP CAP 63V 10 4 7NF 5322 126 10223 C551 CER CHIPCAP 25V 20 100NF 5322 126 13638 C552 CER CHIPCAP 25V 20 100NF 5322 126 13638 C553 CER CHIP CAP 63V 5 150PF 5322 122 33538 C554 CER CAP 5 1206 10 1UF 5322 126 14089 555 561 562 563 564 565 567 568 572 573 574 576 583 591 592 593 594 C602 C603 C604 C605 C606 C607 C60
104. FLUKE 43B Power Quality Analyzer Service Manual 4822 872 05385 December 2001 2001 Fluke Corporation All rights reserved Printed in the Netherlands All product names are trademarks of their respective companies SERVICE CENTERS To locate an authorized service center visit us on the World Wide Web http www fluke com or call Fluke using any of the phone numbers listed below 1 888 993 5853 in U S A and Canada 3 1 402 678 200 in Europe 1 425 446 5500 from other countries Table of Contents Chapter Title Page 1 Safety Instructions III u Q 1 1 Vd Introduction o rre rt e i Oe 1 3 1 2 Safety Precautioris iue mee rre her eee a re Dritte cole 1 3 1 3 Caution and Warning Statements eese 1 3 DA Symbols an u nu a uu Su 1 3 1 5 Impaired Safety ans ana ua aun rete eripe edes 1 4 1 6 General Safety Information n n 1 4 2 2 1 ZA ntroduction e tet e e ae ettam 2 3 2 2 Safety Specifications o i aote tessile 2 3 2 3 Function Specifications eee eene ete e 2 4 2 3 1 Electrical functions 2 4 22 S CODO ia ced ael n eee re eee ge tee b eei e edis 2 5 2 3 3 n e ate 2 7 DBAs ReCOtd i neret rede t e 2 7 2
105. Failures typically show up when contaminated units are operated in humid areas 6 3 Disassembling the Main PCA Unit Referring to Figure 6 3 use the following procedure disassemble the main PCA unit 1 Remove the M2 5 Torx screws items 1 and 8 that secure the main shielding plate item 7 to the main PCA shielding box item 5 2 Pull the shielding plate away from the input banana jacks as you rotate the far end upwards and then remove it Remove the power input insulator item 3 and the LED guide piece item 6 4 Remove the M2 5 Torx screws item 2 that secure the PCA to the shielding box Lift the PCA at the screw end approximately 2 cm and pull it away from the input banana jack holes to remove it Note Each input banana jacket is provided with a rubber sealing ring Input 1 2 item 9 COM input item 10 Ensure that the rings are present when reassembling the main PCA unit 6 6 Disassembling 6 3 Disassembling the Main PCA Unit Caution To avoid contaminating the main PCA with oil from your fingers do not touch the contacts or wear gloves contaminated PCA may not cause immediate instrument failure in controlled environments Failures typically show up when contaminated units are operated in humid areas 2x ST8015 ST8015 CGM 6 3 Main PCA Unit Assembly 43 Service Manual 6 4 Reassembling the Main PCA Unit Reassembling the main PCA is the reverse of disassembly Howeve
106. HF input not used for Input 2 The HF component of the input signal is supplied to four external HF capacitive attenuators via C104 Depending on the required range the C ASIC selects and buffers one of the attenuator outputs 1 10 100 HF2 or 1000 By attenuating the HF3 input internally by a factor 10 the C ASIC can also create a 10000 attenuation factor Inputs of not selected input buffers are internally shorted To control the DC bias of the buffers inputs their output voltage is fed back via an internal feed back resistor and external resistors R115 R111 R120 R112 R113 and R114 The internal feed back resistor and filter R110 C105 will eliminate HF feed back to obtain a 3 15 43 Service Manual large HF gain The C ASIC includes a HF pre amplifier with switchable gain factors for the 1 2 5 steps The C ASIC also includes circuitry to adjust the gain and pulse response ADC output pin 27 The combined conditioned HF LF signal is supplied to the ADC output pin 27 via an internal ADC buffer The output voltage is 150 mV d The MIDADC signal 28 supplied by the ADC matches the middle of the C ASIC output voltage swing to the middle of the ADC input voltage swing TRIGGER output pin 29 The combined conditioned HF LF signal is also supplied to the trigger output pin 29 via an internal trigger buffer The output voltage is 100 mV d This signal TRIG A is supplied to the TRIGGER A
107. IC supplies a current to R516 The current source uses REFPWM2 and IREF see 2 and 3 below 2 Check N501 pin 73 REFPWM2 for 3V3 REFPWM is supplied by the P ASIC Check TP307 N501 pin 72 REFP for 1 22V check V301 and R307 3 Check N501 pin 74 IREF for 1 61V If not correct possibly caused by R528 loose pin 74 or N501 defective Check 3V3SADC on N501 pin 65 for 3 3V 7 Check TP531 CHARCURR The CHARCURR signal controls the battery charge current If TP531 2 7V continue at step 7a If TP531 gt 2 7 continue at step 7b a Check if charger FET V506 is controlled by a 100 kHz 13 Vpp square wave on TP502 FET gate If correct check replace 506 If not correct check 1 N501 pin 4 TEMPHI relative to X503 pin 3 N501 pin 9 for 200 mV If not correct check R512 and connections 2 N501 pin 5 TEMP relative to X503 pin 3 N501 pin 9 for 400 500 mV at about 20 If not correct check the NTC in the battery pack for 12 at 20 C X503 pins 3 and 5 check connections to N501 3 N501 pin 6 IMAXCHA for 150 mV If not correct check R514 and connections to N501 4 N501 pin 7 VBATHIGH for 1 2V If not correct check R513 and connections to N501 Steps 1 to 4 verify that N501 supplies a 47 UA current to each of the resistors R512 battery NTC R514 and R513 5 Check N501 pin 9 for the same voltage as on X503 pin 3 sense resistors R504 R506 and R507 6 If 1to 5 above correct
108. IG TRIGQUAL The ALLTRIG signal supplied by the T ASIC contains all possible triggers For normal triggering the T ASIC uses ALLTRIG to generate the final trigger TRIGDT For qualified triggering the D ASIC returns a qualified e g each trigger pulse to the T ASIC TRIGQUAL Now the T ASIC derives the final trigger TRIGDT from the qualified trigger signal TRIGQUAL Capacitance measurements ALLTRIG As described in Section 3 3 2 capacitance measurements are based on measuring the capacitor charging time using a known current The ALLTRIG pulse signal represents the charging time The time is counted by the D ASIC Microprocessor ROM and RAM control mask ROM The D ASIC includes a microprocessor with a 16 bit data bus The instrument software is loaded in Flash ROM D472 Measurement data and instrument settings are stored in RAM D475 All RAM data will be lost if all power sources battery and power adapter are removed The D ASIC has on chip mask ROM If no valid Flash ROM software is present when the test tool 16 turned on the mask ROM software will become activate The test tool can be forced to stay in the mask ROM software by pressing the and gt key and then turning the test tool on When active the mask ROM software generates a 100 kHz square wave on pin 59 of the D ASIC 3 25 43 Service Manual 3 26 The circuit D480 and related parts create a delay for the ROMWRITE enable signal This prevents the ROM wri
109. ISTOR CHIP RC12H 1 RC12H 1 RC 02H 1 RC 02H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC11 2 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 5K11 1K 261E 261E 26K1 10 1 10 10 10 1 10 1 1 10 21 5 1 1 511 3 16 10 26K1 68E1 1E 1E 21K5 147K 147K 147K List of Replaceable Parts 8 5 Main PCA Parts Reference Description Ordering Code Designator 5322 117 12469 4822 117 11154 4822 051 52611 4822 051 52611 5322 117 12448 5322 117 12471 5322 117 12471 5322 117 12464 5322 117 12472 5322 117 12464 5322 117 12464 5322 117 12471 5322 117 12464 5322 117 12472 5322 117 12471 5322 117 12464 5322 117 12472 5322 117 12472 4822 117 10833 5322 117 12477 5322 117 12472 4822 117 11154 5322 117 12451 5322 117 12465 4822 051 20106 5322 117 12448 5322 117 12454 5322 117 12472 5322 117 12472 5322 117 12477 5322 117 12478 5322 117 12478 5322 117 12478 8 43 Service Manual Reference Description Ordering Code Designator R436 RESISTOR CHIP RC12H 1 26K1 5322 117 12448 R438 RESISTOR CHIP RC12H 1 147K 5322 117 12478 R439 RESISTOR CHIP RC12H 1 21K5 5322 117 12477 R441 RESISTOR CHIP RC12H 1 3K16 5322 117 12465 R442 RESISTOR CHIP RC12H 1 1K47 5322 117 12479 R
110. Input 1 reading and check to see if it is between 00 00 and 00 10 nF When you are finished set the 5500A to Standby 4 27 43 Service Manual Table 4 9 Capacitance Measurement Verification Points 30 uF 29 30 to 30 70 300 uF 293 0 to 307 0 0 0 00 to 0 10 remove test tool input connections see steps 7 10 4 7 Inrush Current Proceed as follows to test the INRUSH CURRENT 1 Connect the test tool to the 5500A as shown in Figure 4 8 FLUKE 5500A CALIBRATOR PM9091 001 1 5m 9092 001 0 5m 9081 ST8588 wmf Figure 4 8 Test Tool Input 2 to 5500A NORMAL output 2 Press 3 Press to highlight INRUSH CURRENT 4 Press to enter mode Now the MAXIMUM CURRENT is highlighted If the CURRENT IS NOT 1000A then 1 Press 2 Press S to highlight 1000A 3 Press to confirm L mark changes to 4 Setthe 5500A to 0V NORMAL output Press to highlight INRUSH TIME 6 Press to select 7 Press S to highlight 10 seconds 4 28 8 9 Performance Verification 4 4 8 Sags amp Swells Press to confirm L mark changes to Press S to highlight START 10 Press to start the measurement 11 Set the 5500A to 1 5V DC Now the measurement should start and continue for 10s The trigger point is after 2 divisions With 20 you can move a cursor and with you can toggle between the cursors Checking the result 1 Cho d se RJ Press 20 to move the left cursor t
111. MSMS1008 TP 51 1 AO 21 ALLTRIG D08CSO 13 UGT K _ 11 1an 22 _ READRAM q TRIGDT D08CS1 RAM 09 2 31 10 C432 C434 C438 C441 T TRIGQUAL 23 TRIGQUAL D08CS2 134 NC RAM A08 19 10 30 RAM 50 100 22n 4n7 22n R478 RNDM RSTRAMP 2 24 TROTRST RAMRD 133 READRAM RAM A13 418 51 5 RAM D7 C479 10K i 25 SHLDPWM D ASIC RAMWR 132 WRITERAM 5 18 28 D6 480 HO RNDM 26 PWMA10N6 vss 131 6 27 05 F 22p 100 TRGLEVID 27 180 l S2 A17 Tm PWMA10N5 130 VD a B11 RAM A15 7 A45 DQ5 26 RAM D4 CONTRAST R409 R436 CONTR D i TRGLEV2 28 PWMA10N4 RAVA0 129 REM AD 8 vcc DQ4 25 RAM D3 C7 26K1 26K1 DEUM BUS POS B D m 29 PWMA10N3 RAMA1 RAM 18 9 NC A18 GND 24 5 C16 30 2 RAMA2 Li RAM_A16 10 23 RAM D2 1 C436 x OFFSETED 31 PWMA12N1 126 03 RAM A14 11 22 RAM 01 n REFPWMI 32 VDDREFA MOTO0002N1 125 04 RAM A12 12 lato 202 21 RAM DO z R405 RAOG R408 33 vssREF RAMAS 124 05 RAM_A07 18 Ao 20 RAM 00 1K 511 10 463 OFFSETAD V PWMA12NO RAMAS 123 RAM A06 RAM A06 14 18 BAM A01 T 100 5 16 PACKBRIG 35 PWMA10N1 RAMA7 122 RAM A07 RAM 05 15 46 RAM A02 36 PWMA10N0 Ramas 121 08 RAM A04 16 05 17 RAM 03 SN nS CONTR D a PWMA8N0 RAMA9 a 0
112. Main PCA unit Position the Keypad on the Keypad foil See Figure 7 1 The Test tool without the case is operative now Power the PCA via the Power Adapter and or battery pack Watch out for short circuiting due to metal parts on your desk sei ER Ier net eet rent e 4c eld une 02 Must ba reeurled or disp ol orooertf Figure 7 1 Operative Test Tool without Case REPAIR3 BMP 7 7 3 43 Service Manual 7 2 Starting Fault Finding After each step continue with the next step unless stated otherwise Power the test tool by the battery pack only then by the power adapter only 1 The test tool operates with the power adapter but not with the battery only install a charged battery VBAT gt 4V and check the connections between the battery and the test tool X503 504 R506 R507 The test tool operates with the battery pack but not with the power adapter only and the battery pack 1s not charged by the test tool continue at 7 3 Charger Circuit The test tool operates neither with the battery pack nor with the power adapter continue at 7 4 Starting with a Dead Test Tool Particular functions are not correct continue at 7 5 Miscellaneous Functions Table 7 1 Starting Fault Finding NOT OK Battery pack connector sense resistors NOT OK See 7 3 Charger Circuit NOT OK NOT OK See 7 4 Starting with a Dead Test Tool Partly OK Partly OK See 7
113. Manual E U Es s e w A o N U e A
114. NV NIC 9 C607 R604 471 gt Ze zp to 1K i 72 I MUX TP537 NS H522 v H521 C605 938 R603 906 409 4 014 100K 8531 I 1 14014 R591 21 5 L C591 C592 C593 C594 l RENE SRE MORON TP604 R602 C610 R600 K 100n 100n 100n T 100n 2 15 C531 R606 70K 5 11 BACKBRIG sQ 22n 6K19 14 68 EN 3V3GAR 6 A TP605 APWM BUS me rM Eus R605 amp R606 not for versions lt 3 ST8559 1 40 OPTICAL PORT 000124 Ieee akg peers tei 2 9 12 Figure 9 6 Circuit Diagram 5 Power Circuit ST8559 1 W MF 9 9 2 Schematic Diagrams 5 MS422 MS454 MS453 ig js tal Pas 1 2 03 p251 TP151 C399 Lr 308 TP70 TP591 e e oi TP536 537 TP451 B402 B403 2 8 Hi 1 C504 h e TP471 476 534 r TP593 4022 245 0482 3 ST8561 1 991117 TP258 495 496 572 TP152 156 TP310 331 332 336 338 431 432 436 437 438 482 483 486 600 605 151 251 254 255 256 TP528 551 552 574 576 592 593 TP301 304 308 309 311 321 322 TP 471 474 476 TP433 TP 526 534 536 537 561 591 DT PD TP521 TP306 307 503 522 527 531 571 TP501 502 504 529 577 Figure 9 7 Main PCA side 1 PCB version 3 st8561 1 wmf 9 13 43 Service
115. P CAP 63V 5 470PF 5322 122 32268 C201 MKC FILM CAP 630V 10 22NF 5322 121 10616 C202 SUPPR CAPACITOR 0 1 UF 5322 121 10527 C204 CER CAP 3 15KV 5 120PF 5322 126 14046 C206 CER CAP 1KV 20 80 4 7NF 5322 126 13825 C207 CER CHIP CAP 63V 5 470PF 5322 122 32268 C211 CER CAP 1 500V 0 25PF 4 7PF 5322 122 33082 C231 CER CHIP CAP 63V 0 25PF 0 68PF 4822 126 12342 C232 CER CHIP CAP 63V 0 25PF 4 7PF 5322 122 32287 233 234 236 242 246 248 252 253 256 258 259 C261 C262 C281 C282 C283 C284 C286 C287 C288 C289 C290 C291 C292 C293 C294 C295 C296 C297 C298 C301 C303 C306 CER CHIP CAP 63V 5 CER CHIP CAP 63V 5 470PF CER CHIP CAP 63V 10 4 7NF CHIPCAP NPO 0805 5 1NF CC 33NF 10 0805 X7R 50V CHIPCAP X7R 0805 10 10NF X7R 0805 1096 15NF CHIPCAP X7B 0805 10 22NF CHIPCAP NPO 0805 5 1NF CER CHIP CAP 63V 5 150PF CHIPCAP 0805 5 100PF 25 20 100 CER CHIP CAP 63V 0 25PF 4 7PF ALCAP SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CC 10NF 2 1210 NPO 50V CC 10NF 2 1210 NPO 50V CC 100 NF 20 0805 X7R 25V CC 0 56 PF 45 0805 NPO 50V CC 100 NF 20 0805 X7R 25V CC 100 NF 20 0805 X7R 25V CC 10NF 2 1210 NPO 50V CER CHIPCAP
116. Press and select OHMS CONTINUITY CAPACITANCE Press Capacitance Verify TP156 for 3 3 OV pulses repetition rate 100 200 ms Zero scale open input pulse width approximately 30 48 Full scale for example 500 nF pulse width approximately 25 ms If not correct most probably the C ASIC N101 is defective If correct continue at 7 5 8 Trigger functions pulse width is measured via the T ASIC 7 5 8 Trigger Functions l Select the Scope Normal mode for both input channels Press rm highlight SCOPE and press press SETUP highlight INPUT 2 Coupling XXX press highlight ODC press highlight Time Base XXX press highlight ONORMAL press press BACK Supply a 1 kHz sine wave of 3 divisions to Input 1 and Input 2 Check a 156 TP256 for a 600 mV 6 div x 100 mV div 1 kHz sine wave the DC level depends on the trace position The sine wave is interrupted now and then to do a reference measurement If not correct C ASIC N101 N102 is probably defective b TP321 TP322 for 1 1 1 9V DC move the trigger level from top to bottom If not correct check the PWM circuit see 7 5 8 c TP3llfor a 0 3 3 1 kHz square wave when the trigger level is at the middle of the trace Change the trigger level and verify that the duty cycle of the square wave changes If not correct T ASIC N301 may be defective d TP433 for 0 3 3V pulses Pulse width 4 10 us for time base 2 us div and
117. Press till SCOPE is highlighted e Press to select SCOPE mode Select the following test tool setup Press to select menu SCOPE SETUP e Press S to highlight Input 1 Reading Press to go to Input 1 READING e Press S to highlight AC DCrms Press to confirm L mark changes to e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight DC Coupling e Press to confirm L mark changes to Press to return to SCOPE Set the 5500A to source a leveled sine wave of 1 2V peak to peak 50 kHz SCOPE output MODE levsine Adjust the amplitude of the sine wave to a reading of 424 mV 8 mV Set the 5500A to 20 MHz without changing the amplitude Observe the Input 1 trace and check the reading is 2 297 mV When you are finished set the 5500A to Standby Note The lower transition point is tested in Section 4 5 9 4 5 3 Input 1 Frequency Measurement Accuracy Test Proceed as follows to test the Input 1 frequency measurement accuracy l 2 Connect the test tool to the 5500A as for the previous test see Figure 4 2 Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 4 7 43 Service Manual 4 8 3 Select the following test tool setup Press to select menu SCOPE SETUP Press S to highlight Input 1 coupling Press to select the Input 1 coupling menu Press
118. SIC for triggering and for capacitance measurements For capacitance measurements the ADC output is not used but the TRIG A output pulse length indicates the measured capacitance see Capacitance measurements below GPROT input pin 2 PTC Positive Temperature Coefficient resistors R106 R206 are provided between the Input 1 and Input 2 shield ground and the COM input instrument ground This prevents damage to the test tool if the various ground inputs are connected to different voltage levels The voltage across the PTC resistor is supplied via the GPROT input pin 2 to an input buffer If this voltage exceeds 200 mV the ground protect circuit in the C ASIC makes the DACTEST output pin 24 high The DACTEST line output level is read by the D ASIC via the slow ADC See 3 3 2 Power The test tool will give a ground error warning Because of ground loops a LF interference voltage can arise across PTC resistor R106 mainly mains interference when the power adapter is connected To eliminate this LF interference voltage it is buffered also via input GPROT pin 2 and subtracted from the input signal Pin 43B PROTGND is the ground reference of the input buffer CALSIG input pin 36 The reference circuit on the TRIGGER part supplies an accurate 1 23 V DC voltage to the CALSIG input pin 36 via R141 This voltage is used for internal calibration of the gain and the capacitance measurement threshold levels A reference current Ical i
119. T is supplied either by the power adapter via V506 L501 or by the battery pack It powers a part of the P ASIC via R503 to pin 60 VBATSUP If the test tool is off the Fly Back Converter is off and VBAT powers the D ASIC via transistor V569 3V3GAR This 3V3GAR voltage is controlled and sensed by the P ASIC If it is NOT OK 3 05V the output VGARVAL pin 64 is low The VGARVAL line is connected to the D ASIC and if the line is low the D ASIC is inactive the test tool is in the Idle mode A low VGARVAL line operates as a reset for the D ASIC If VGARVAL is high 3V3GAR gt 3 05V the D ASIC becomes active and the Off mode is entered The D ASIC monitors the P ASIC output pin 12 MAINVAL and the test tool ON OFF status By pressing the ON OFF key a bit in the D ASIC indicating the test tool ON OFF status is toggled If no correct power adapter voltage 1s supplied MAINVAL is low and the test tool 1s not turned on the Off mode will be maintained If a correct power adapter voltage is supplied MAINVAL high or if the test tool is turned on the mask software starts up The mask software checks if valid instrument software is present If not e g no instrument firmware 1s loaded the mask software will 3 9 43 Service Manual keep running and the test tool is not operative the test tool is in the Mask active state For test purposes the mask active mode can also be entered by pressing the and gt key when the test tool is
120. The turn on edge of the COUT signal is synchronized with each zero detect Outputs AOUT and BOUT of N600 provide complementary drive signals for the push pull FETs V601a b dual FET If V601a conducts the circuit consisting of the primary winding of transformer T600 and C608 will start oscillating at its resonance frequency After half a cycle a zero voltage is detected on pin 9 ZD of N600 V601a will be turned off and V601b is turned on This process goes on each time a zero is detected The secondary current is sensed by R600 R604 and fed back to N600 pin 7 and pin 4 for regulation of the PWM buck regulator output voltage The signal supplied by the D ASIC provides a pulse width modulated variable duty cycle square wave By changing the duty cycle of this signal the average on resistance of V604 can be changed This will change the secondary current and thus the back light intensity The voltage on the cold side of the lamp is limited by V605 and V603 This limits the emission of electrical interference R605 and R606 provide a more reliable start up of the backlight PCB version 3 up only CN YN Yy Voltage at T600 pin 4 Voltage AOUT Voltage BOUT l LE LI L Zero Zero detect detect Figure 3 7 Back Light Converter Voltages Circuit Descriptions 3 3 3 Detailed Circuit Descriptions 3 3 2 Input 1 Input 2 Measurement Circuits The description below refers to circuit diagrams Figure 9
121. a control Slow ADC control serial RS232 interface control buzzer control etcetera The D ASIC is permanently powered by the 3 V3GAR voltage The P ASIC indicates the status of the 3 V3GAR voltage via the VGARVAL line connected to D ASIC pin 89 f 3 V3GAR 15 correct VGARVAL is high the D ASIC will start up and the D ASIC functions are operative regardless of the test tool is ON OFF status Analog to Digital Conversion For voltage and resistance measurements the Input 1 2 2 for voltage only signal is conditioned by the C ASIC to 150 mV d Zero and gain measurements are done to eliminate offset and gain errors The C ASIC output voltage is supplied to the Input 1 2 ADC D401 D451 pin 5 The ADC samples the analog voltage and converts it into an 8 bit data byte 00 07 The data are read and processed by the D ASIC see below ADC data Acquisition The sample rate depends on the sample clock supplied to pin 24 The sample rate is 5 MHz or 25 MHz depending on the instrument mode The ADC input signal is sampled Circuit Descriptions 3 3 3 Detailed Circuit Descriptions the rising edge of the sample clock The digital equivalent of this sample is available on the outputs D0 D7 with a delay of 6 sample clock cycles The reference voltages REFADCT and REFADCB determine the input voltage swing that corresponds to an output data swing of 00000000 to 11111111 DO D7 reference voltages are supplied by the reference circuit
122. ad b Ifyou hear a weak beep continue at 7 4 2 Test Tool Software Does not Run c Ifyou hear a normal beep the software runs but obviously the test tool is not operative Continue at 7 4 3 Software Runs Test Tool not Operative 7 4 1 Test Tool Completely Dead l Turn the test tool off Keep the 5 arrow keys pressed and turn the test tool on again This will start up the mask software If you still hear no beep continue at step 2 If you hear a weak beep now continue at 7 4 2 Check the Keyboard line MS433 next to X452 for a 100 kHz square wave If not correct continue at step 3 If correct the mask software runs but the buzzer circuit does not function Check the buzzer function 7 5 10 and then continue at 7 4 2 Check N501 pin 60 VBATSUP for gt 4 8V If not correct check R503 and connections to battery pack Check TP571 3V3GAR for 3V3V If not correct this is possibly caused by V569 R580 TP571 short to ground loose pins of N501 or N501 defective Check the VD supply voltage on D ASIC D471 Temporarily remove R470 to check for short circuit Check N501 pin 64 VGARVAL for 3 3V If not correct a Check if the line is shorted to ground b Check N501 pin 73 2 for 3V3 REFPWM2 is supplied by N501 and derived from REFP on the reference circuit on the Trigger part Check Corrective Maintenance 7 7 5 Miscellaneous Functions TP307 N501 pin 72 REFP
123. ages are supplied by the Fly Back Converter on the POWER part The voltages are present only if the test tool is turned on 3 3 3 Trigger Circuit 3 20 The description refers to circuit diagram Figure 9 3 The trigger section is built up around the T ASIC OQ0257 It provides the following functions e Triggering trigger source selection trigger signal conditioning and generation of trigger information to be supplied to the D ASIC e Current source for resistance and capacitance measurements e Voltage reference source buffering and generation of reference voltages e AC DC relay and Resistance Capacitance Q F relay control Triggering Figure 3 10 shows the block diagram of the T ASIC trigger section TRIGGER ASIC 000257 trigger section 19 gt ALLTRIG TRIGQUAL ALLTRIG select synchronize 34 uw me logie TRIGDT t 3 HOLDOFF 38 SMPCLK freq detect 2 DACTEST analog Es trigger path Figure 3 10 T ASIC Trigger Section Block Diagram The analog trigger path uses the Input 1 TRIG A or Input 2 TRIG B signal for triggering In the Transients mode the TRIG A or TRIG B signal is routed via a high pass filter TVOUT TVSYNC The High Pass Filter consists of C395 and R399 The TRIG A TRIG B or TVSYNC signal and two trigger level voltages TRIGLEV1 and TRIGLEV2 are supplied to the analog trigger part The trigger level voltages are supplied by the PWM sec
124. al regulator in the P ASIC regulates the 3 V3GAR voltage and limits the current 43 Service Manual Fly Back Converter When the test tool is turned on the D ASIC makes the PWRONOEFF line P ASIC pin 62 high Then the self oscillating Fly Back Converter becomes active It is started up by the internal 100 kHz oscillator that is also used for the Charger Converter circuit First the FLYGATE signal turns FET V554 on see Figure 3 5 and an increasing current flows in the primary transformer winding to ground via sense resistor R551 If the voltage FLYSENSP across this resistor exceeds a certain value the P ASIC turns FET V554 off Then a decreasing current flows in the secondary windings to ground If the windings are empty all energy transferred the voltage VCOIL sensed by the P ASIC pin 52 is zero and the FLYGATE signal will turn FET V554 on again Primary current V554 ON FLYGATE SIGNAL V554 OFF Figure 3 5 Fly Back Converter Current and Control Voltage The output voltage is regulated by feeding back a part of the 3V3A output voltage via R552 R553 R554 to pin 54 VSENS This voltage is referred to a 1 23 V reference voltage Any deviation of the 3V3A voltage from the required 3 3V changes the current level at which current FET V554 will be switched off If the output voltage increases the current level at which V554 is switched off will become lower and less energy is transferred to the secondary win
125. arge current is set to 0 5A fast charge From the battery voltage change dV dt the D ASIC can see when the battery is fully charged and stop fast charge Additionally a timer in the D ASIC limits the fast charge time to 6 hours After fast charge 0 2A top off charge current is supplied for 2 hours Then a 0 06A trickle Circuit Descriptions 3 3 3 Detailed Circuit Descriptions charge current is applied for 48 hours maximum If the battery temperature becomes higher than 50 C the charge current is set to zero Battery temperature monitoring The P ASIC supplies a current to a NTC resistor in the battery pack TEMP pin 5 It conditions the voltage on pin 5 and supplies it to output 79 BATTEMP D ASIC measures this voltage via the slow ADC It uses the BATTEMP voltage to decide if fast charge is allowed 10 45 C or no charge is allowed at all 10 C gt 50 O Additionally the temperature is monitored by the P ASIC The P ASIC supplies a current to reference resistor R512 TEMPHI pin 4 and compares the resulting TEMPHI voltage to the voltage on pin 5 TEMP If the battery temperature is too high the P ASIC Control circuit sets the charge current to zero in case the D ASIC fails to do this If the battery temperature monitoring system fails a bimetal switch in the battery pack interrupts the battery current if the temperature becomes higher then 70 C Maximum VBAT The P ASIC supplies a current to reference re
126. ata will not be saved Exit maintenance mode e Tosave the calibration data Press NO The test tool returns to the maintenance mode Connect a correct power adapter and press to exit and save To exit without saving the calibration data Press YES Chapter 6 Disassembling Title Page Gok AIKOO LELE TOTE rtr dd uama u s 6 3 6 2 Disassembling Procedures 6 3 6 1 T Required the tare 6 3 6 2 2 Removing the Battery 1 44 41 4 40000 600000000504 6 3 0 2 3 Removing the Bail feiss eee eee eem Pee eee eene 6 3 6 2 4 Opening the Test Tool ener nennen 6 3 6 2 5 Removing the Main Uhnit esses 6 5 6 2 6 Removing the Display Assembly 6 6 6 2 7 Removing the Keypad and Keypad Foll 6 6 6 3 Disassembling the Main PCA Unit essere 6 6 6 4 Reassembling the Main PCA Unit esses 6 8 6 5 Reassembling the Test Tool essen 6 8 Disassembling 6 1 Introduction 6 1 Introduction This section provides the required disassembling procedures The printed circuit board removed from the test tool must be adequately protected against damage Warning To avoid electric shock disconnect test leads probes and power supply from any live source and from the test tool itself Alw
127. ays remove the battery pack before completely disassembling the test tool If repair of the disassembled test tool under voltage is required it shall be carried out only by qualified personnel using customary precautions against electric shock 6 2 Disassembling Procedures 6 1 1 Required Tools To access all the assemblies you need the following e Static free work surface and anti static wrist wrap e 8 and 10 Torx screwdrivers e Cotton gloves to avoid contaminating the lens and the PCA 6 2 2 Removing the Battery Pack Referring to Figure 6 1 use the following procedure to remove the battery pack 1 Loosen the M3 Torx screw item 15 do not remove it from the battery door 2 Lift the battery door at the screw edge to remove it 3 Lift out the battery pack and unplug the cable leading to the Main PCA pull the cable gently backwards 6 2 3 Removing the Bail Referring to Figure 6 1 use the following procedure to remove the bail item 16 1 Set the bail to a 45 degree position respective to the test tool bottom 2 Holding the test tool tight rotate the bail firmly sideways 6 2 4 Opening the Test Tool Referring to Figure 6 1 use the following procedure to open the test tool 1 Remove the battery pack see Section 6 2 2 2 Unscrew the four M3 Torx screws item 12 that secure the bottom case to the top case 3 Hold the test tool upside down and lift off the bottom case 6 3 43 Service Manual
128. bracket ST78197 EPS Figure 6 5 Battery pack installation 6 9 Chapter 7 Corrective Maintenance Title Page Trtroduction sii o e eret ip Soa th e RT 7 3 7 2 Starting Fault Finding essere 7 4 PB Charger ette ee Rer EP n me aee 7 4 7 4 Starting with a Dead Test Tool 7 6 7 4 1 Test Tool Completely 11 4212 44 41 00000000000000000000504 7 6 7 4 2 Test Tool Software Does not 7 7 7 4 3 Software Runs Test Tool not Operative 7 7 7 5 Miscellaneous Functions s nnns 7 7 7 5 1 Display and Back 414222222222 000 004000000000000000000050544 7 7 75 2 Fly Back Converter oes eei et rte 7 8 ING S bapa eiue ton cu Dri 7 9 te Beds 7 10 7 5 5 Optical Port Serial RS232 Interface 7 11 7 5 6 Input Channel 1 and 2 Voltage Measurements 7 11 7 5 7 Ohms and Capacitance Measurements 7 12 7 5 8 Trigger Functions arabe ee bte ed dera eese eee den a adea 7 13 75 9 Reference Voltages ii dete eee e des eee 7 14 1 5 10 Buzzer Circuit
129. cation Points Sensitivity 5500A output DC Reading V DC Input 1 Input 2 mV or V div A or kA div 5 mV div 14 4 to 15 6 2 14 88 to 15 13 2 10 mV div 20 mV div 50 mV div 50 mV div 150 mV 148 7 to 151 3 148 7 to 151 3 100 mV div 298 0 to 302 0 7777708 500 midi 4 970 to 5 030 4 970 to 5 030 20 Ka T te 3020 100 V div 100 kA div 300V 298 0 to 302 0 298 0 to 302 0 D The 500V and 1250V range will be tested in Section 4 5 13 Due to calibrator noise occasionally OL overload can be shown 4 5 9 Input 1 and 2 AC Voltage Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to test the Input 1 and 2 AC Voltage accuracy 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 43 Service Manual 4 18 Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode Select DC coupling amp reading for Input 1 and 2 e Press to select menu SCOPE SETUP e Press to select Input 1 READING e Press S to highlight ACrms e Press to confirm L mark changes to e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu e Press S to highlight AC Coupl
130. cuits aS aa 7 15 List of Replaceable 2 8 1 8 1 Introduction eie edle b e E e gr 8 3 8 2 How to Obtain Parts edente deter tree re deterrere reducto 8 3 8 3 Final Assembly Parts 1 10 1 8 4 8 4 Mam PCA Unit Parts rne eben teen eee akana gs cd 8 6 8 5 Mam PCA Parts usa PRAE aei eM IRE 8 7 8 6 Accessory Replacement Parts a 8 23 9 1 is 9 3 9 2 Schematic Diagrams enne enne nnne 9 3 Modifications ieinter 10 1 10 1 Software modifications u in ansa 10 3 10 2 Hardware modifications essent 10 3 List of Tables Table Title Page EEA 1 3 221 6 No Vasible Disturbance s tu ee et et ded 2 10 252 Disturbance nasman o RU 2 10 cec ettet t t e ttt 2 10 3 1 Fluke 43B Main BIOcKS unu L huu ly q 3 3 3 2 Fluke 43B Operating Modes 3 8 3 3 Input 1 Voltage Ranges And Trace Sensitivity
131. d the D ASIC drives the rows and senses the columns The ON OFF key is not included in the matrix This key toggles a flip flop in the D ASIC via the ONKEY line D ASIC pin 72 As the D ASIC is permanently powered the flip flop can signal the test tool on off status PWM Signals The D ASIC generates various pulse signals by switching a reference voltage REFPWMI or 2 with software controllable duty cycle PWMA PWMB pins 26 40 By filtering the pulses in low pass filters RC software controlled DC voltages are generated The voltages are used for various control purposes as shown in Table 3 6 Table 3 6 D ASIC PWM Signals mms paneon oestmton sete HO RNDM HOLDOFF randomize control R487 of RANDOMIZE circuit REFPWM1 TRGLEV1D Trigger level control T ASIC REFPWM1 TRIGLEV2D POS AD POS BD Input 1 B position control C ASIC REFPWM1 OFFSETAD Input 1 B offset control C ASIC REFPWM1 OFFSETBD Display contrast control SDA SCL Serial Bus The unidirectional SDA SCL serial bus pin 56 57 is used to send control data to the C ASIC s e g change attenuation factor and the T ASIC e g select other trigger source The SDA line transmits the data bursts the SCL line transmits the synchronization clock 1 25 MHz Probe Detection Via the probe detection inputs PROBE A and PROBE B pin 54 55 the D ASIC detects 1f the Input 1 and 2 probes have been connected disconnected The SUPPRDET signal pin 99
132. d Gain DMM CL0815 will be calibrated now Wait until the display shows calibration status Gain DMM CL0815 READY Set the 5500A to zero and to Standby Continue at Section 5 6 4 5 6 4 Volt Zero Proceed as follows to do the Volt Zero calibration 1 2 3 4 5 6 Press to select calibration adjustment step Volt Zero CL 0820 IDLE Terminate Input 1 and Input 2 with the BB120 and a 500 or lower termination Press to start the zero calibration of all mV d settings CL0820 CL0835 Wait until the display shows Volt Zero CL 0835 READY Remove the 500 termination from the inputs Continue at Section 5 6 5 5 6 5 Gain Ohm Proceed as follows to do the Gain Ohm calibration l 2 Press select calibration adjustment step Gain Ohm CL 0860 IDLE Connect the UUT to the 5500A as shown in Figure 5 7 Notice that the sense leads must be connected directly to the test tool Calibration Adjustment 5 6 Final Calibration FLUKE 5500A CALIBRATOR ST8003 WMF Figure 5 7 Four wire Ohms calibration connections 3 Setthe 5500A to the first test point in Table 5 4 Use the 5500A COMP 2 wire mode for the calibration adjustments up to and including 100 For the higher values the 5500A will turn off the COMP 2 wire mode Set the 5500A to operate OPR Press to start the calibration Wait until the display shows the calibration status READY mu 291 C i Press to select the next calibration s
133. d between the Input 1 and Input 2 ground shield or between one of these ground shields and the black COM input the PTC resistor will limit the resulting current The voltage across the PTC resistor is supplied to the C ASIC GPROT input and causes a ground error warning high voltage level on output pin 24 DACTEST Input 2 Voltage Measurements The Input 2 circuit has no HF path The principle of operation is the same as for the Input 1 LF path The input ground is connected via PTC resistor R201 to the 43 Service Manual measurement ground Any voltage across the PTC resistor will be added to the input signal and cause a mis reading This influences Input 2 in particular as this input operates mostly in the lowest voltage ranges see section 3 2 1 For this reason a hum rejection circuit is added for Input 2 The voltage across the is supplied to the inverting X1 amplifier N202 Then the AC part of the N202 output signal is subtracted from the input sigal on the C ASIC LF input pin 42 Resistance Measurements Input 1 only The unknown resistance Rx is connected to Input 1 and the black COM input The T ASIC supplies a constant current to Rx via relay contacts K173 and the PTC resistor R172 The voltage across Rx is supplied to a high impedance input buffer in the C ASIC via the LF input pin 42 The C ASIC conditions the voltage across Rx to an output voltage of 50 mV d This voltage is supplied to the ADC on the Digital part
134. d with 500 its output voltage is two times its set voltage 2 After starting the first step in this table cell these steps are done automatically Table 5 2 HF Gain Calibration Points Slow Cal step 5500A Setting Test Tool Input Signal Requirements 1 kHz MODE wavegen 1 kHz square trise lt 2 us WAVE square flatness after rising edge 0 596 after 4 us HF Gain A CL 0612 50 V 50 V HF Gain A CL 0615 After starting the first step in this table cell these steps are done automatically 5 6 2 Delta T Gain Trigger Delay Time amp Pulse Adjust Input 1 Proceed as follows to do the calibrations 1 Press to select calibration step Delta T CL 0700 IDLE 2 Connect the test tool to the 5500A as shown in Figure 5 4 43 Service Manual FLUKE 5500A CALIBRATOR ST8004 Figure 5 4 5500A Scope Output to Input 1 ST8004 WMF Set the 5500A to source a 1 V 1 MHz fast rising rise time lt 1 ns square wave SCOPE output MODE edge Set the 5500A to operate OPR Press to start the calibration The Delta T gain Trigger Delay CL0720 and Pulse Adjust Input 1 CL0640 will be calibrated Wait until the display shows Pulse Adj A CL 0640 READY When you are finished set the 5500A to Standby Continue at Section 5 6 3 5 6 3 Gain DMM Gain Volt Warning Dangerous voltages will be present on the calibration source and connection cables during the following steps Ensure that the calibrator is in
135. ding As a result the output voltage will become lower An internal current source supplies a current to R559 The resulting voltage is a reference for the maximum allowable primary current IMAXFL Y The voltage across the sense resistor FLYSENSP is compared to the IMAXFLY voltage If the current exceeds the set limit FET V554 will be turned off Another internal current source supplies a current to R558 This resulting voltage is a reference for the maximum allowable output voltage VOUTHI The 3V3A output voltage M3V3A is attenuated and level shifted in the P ASIC and then compared to the VOUTHI voltage If the 3V3A voltage exceeds the set limit FET V554 will be turned off The FREQPS control signal is converted to appropriate voltage levels for the FET switch V554 by the BOOST circuit The voltage VBAT supplies the BOOST circuit power via V553 and R561 The FREQPS signal is also supplied to the D ASIC in order to detect if the Fly Back converter is running well V551 and C552 limit the voltage on the primary winding of T552 when the FET V554 is turned of The signal SNUB increases the FLYGATE high level to decreases ON resistance of V554 less power dissipation in V554 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions CONTROL 58 3 x d 51 OUH 54 VSENS 553 62 PWRONOFF 1 72 REFP 1 23V R553 POWER Figure 3 6 Fly Back Converter Block Diagram Slow ADC The Slow
136. division trace amplitude Moving the trace position with a zero input signal results in a TP156 256 voltage of about 0 4V bottom to 0 4V top If the voltages are not correct do stwmf 6 to 16 if these stwmf are correct then replace the C ASIC Check the supply voltages 3V3A 3 3V 3V3A 3 3V and 5VA 5 V If not correct trace to the Fly Back converter on the Power part 43 Service Manual 10 11 12 13 0 8V 0 8V 14 15 16 17 18 19 Check TP151 POS A and TP251 POS B for about 1 1 V trace at mid screen 0 4V trace at top of screen 1 8V trace at bottom of screen If not correct check the PWM circuit in the Digital Circuit Check TP152 OFFSET A and TP252 OFFSET B for about 1 1V Check TP303 REFN for 1 2V Check TP153 DACTESTA and TP253 DACTESTB for If TP153 is 1 7V the C ASIC is in the reset state 200 mV div fixed sensitivity check SDAT and SCLK see step 15 Check TP155 MIDADCA and TP255 MIDADCB for about 0 9V Select the Scope Normal mode for both input channels Press rm highlight SCOPE and press Gu press SETUP highlight INPUT 2 Coupling XXX press highlight ODC press highlight Time Base XXX press highlight ONORMAL press press BACK Select a time base setting of 20 ms d Check TP258 TRACEROT supplied by T ASIC N301 for the signals shown below typical example at 20 ms div 100 ms 5 ms If n
137. e Table 2 3 Disturbance lt 10 Disturbance less than 10 E 3 V m E 10 V m of full scale Frequency 10 kHz 27 MHz 1 V div 5 V div Frequency 27 MHz 200 MHz 200 mV div 1 V div Frequency 200 MHz 1 GHz no visible disturbance Ranges not specified in Tables 2 and 3 may have a disturbance of more than 10 of full scale 2 10 Chapter 3 Circuit Descriptions Title Page 3 3 3 21 1 ERE PE ee ECHO P oe We ERIS Esa 3 3 3 2 1 Input 1 Input 2 Measurement Circutts 3 3 32 2 Digger CATCUIE 5i itt ee hebetes 3 5 2 222 Digital ele ete artus 3 5 3 2 4 Power Circuit sii Pt E y He Ee ERR 3 6 3 2 5 Start up Sequence Operating Modes 3 7 3 3 Detailed Circuit Descriptions 3 9 3 3 I Power Circuit ee eerte reti een os deen e EE eden 3 9 3 3 2 Input 1 Input 2 Measurement Circutts 3 15 3 3 3 Trigger uu tee re tee e eh 3 20 3 3 4 Digital Circuit utr aee eher ter ta dee 3 24 3 1 43 Service Manual
138. election of the attenuation factor is sent by the D ASIC via the SDA data line The SCL line provides the synchronization clock signal Input 1 Voltage Measurements The input voltage is applied to the HF attenuator inputs of the C ASIC via C104 and to the LF input of the C ASIC via R101 R102 AC DC input coupling relay K171 and R104 The C ASIC conditions the input voltage to an output voltage of 50 mV d This voltage is supplied to the ADC on the Digital part The ADC output data 1s read and processed by the D ASIC and represented as a numerical reading and as a graphical trace Table 3 3 shows the relation between the Input 1 reading range V and the trace sensitivity V d in the Scope mode The selected trace sensitivity determines the C ASIC attenuation gain factor The reading range is only a readout function it does not change the hardware range or the wave form display Table 3 3 Input 1 Voltage Ranges And Trace Sensitivity During measuring input voltage measurements gain measurements and zero measurements are done As a result the voltage supplied to the ADC is a multiplexed zero reference reference input voltage signal In ROLL mode however no gain and zero measurements are done Now the ADC input voltage includes only the conditioned input voltage The input voltage is connected to Input 1 The shield of the input is connected to system ground L via a PTC ground protection resistor If a voltage is applie
139. ess twice to return to your measuring mode or rm to go to MENU The first software release of the Fluke 43B 16 V2 00 10 2 Hardware modifications Changes and improvements made to the test tool hardware are identified by incrementing the revision number of the Main PCA The revision number is printed on a sticker see the example below The sticker is placed on D ASIC D471 on the Main PCA This example of the Main PCA revision number sticker indicates revision 3 Revision 03 In the Fluke 43B Test Tool version 3 of the Printed Circuit Board PCB is used for the Main PCA The version of the PCB is indicated by the last digit of the 12 digit number on the edge near N501 The new version 12 digit code is 4022 245 0482 3 version 3 See Chapter 9 for the drawings of both sides of the PCB 10 3
140. essary for the tests in this chapter but it offers useful test signals to test modes such as Harmonics and Sags amp Swells e Fluke 5500A Multi Product Calibrator including 5500A SC Oscilloscope Calibration Option e Stackable Test Leads 4x supplied with the 5500A 500 Coax Cables 2x Fluke PM9091 1 5m or PM9092 0 5m e 500 feed through termination s 2x Fluke PM9585 e Fluke BB120 Shielded Banana to Female BNC adapters 2x supplied with the Fluke 43B Dual Banana Plug to Female BNC Adapter 1x Fluke PM9081 001 e Dual Banana Jack to Male BNC Adapter 1x Fluke PM9082 001 4 3 How To Verify Verification procedures for the display function and measure functions follow For each procedure the test requirements are listed If the result of the test does not meet the requirements the test tool should be recalibrated or repaired if necessary Follow these general instructions for all tests e For all tests power the test tool with the PM8907 power adapter The battery pack must be installed Allow the 55004 to satisfy its specified warm up period e For each test point wait for the 5500A to settle e Allow the test tool a minimum of 20 minutes to warm up 4 3 43 Service Manual 4 4 Display and Backlight Test Before doing the tests you must reset the test tool to put it in a defined state Proceed as follows to reset the test tool Press to turn the test tool off Press and hold Pre
141. est leads STL120 optional DC to 12 5 MHz 3 dB DC to 20 MHz 6 dB Lower transition point ac 10 Hz 3 dB Bandwidth input 2 current with Banana to BNC adapter a DC to 15 kHz Lower transition point ac 10 Hz 3 dB Scope readings The accuracy of all scope readings is valid from 18 C to 28 C with relative humidity up to 90 for a period of one year after calibration Add 0 1 x the specified accuracy for each C below 18 C or above 28 C More than one waveform period must be visible on the screen V dc A de 0 5 5 counts V ac and V True RMS input 1 DC 10 60 HZ eic uapa 1 10 counts 60 2 iter ri gea 2 5 15 counts 20 kHz to 1 1 2 21 02 00040000000000000000000000000000000000323 5 20 counts MHz to 5 MHZ cos secrets payaqa a Sakaq RC pede edenda 10 25 counts 5 MHz to 20 MHZ setis retro terat te e 30 94 25 counts A ac and A True RMS input 2 60 Hz eerte tete ete ee t DR teer epe Ee 81 1 96 10 counts 60 Hz to I5 KHz itecto een diete e ed 30 25 counts Frequency Hz Pulse width Duty cycle 2 0 to 98 0 2 6 Characteristics 2 2 3 Function Specifications
142. for 1 22V check V301 R307 If no 1 22V and V301 R307 and connections are correct then replace N501 c Check N501 12 NETVALID for 2 6V If not correct proceed as indicated 7 3 step 6 d Check the Power ON OFF function see 7 5 13 Check X tal signals on 473 32 kHz and 476 25 MHz if not correct check connections replace X tals replace D471 The 16 MHz clock on 474 runs only if the test tool software runs If the 16 MHz clock is present then continue at 7 4 3 7 4 2 Test Tool Software Does not Run Oy WS 453 Turn the test tool OFF and again Check D471 pin 59 row1 for a 100 kHz square wave If no 100 kHz is not present but you heard a weak beep the test tool software runs but the buzzer circuit does not function correctly Go to 7 5 10 to check the buzzer circuit then continue 7 4 3 to see why the test tool cannot be operated If a 100 kHz square wave is present the MASK software is running Continue at 3 Check TP487 ROMRST for 23V Load new software to see if the loaded software is corrupted See 7 6 Do the RAM test see 7 5 12 Check for bad soldered address data lines and IC pins Replace FLASH ROM D474 and RAM D475 7 4 3 Software Runs Test Tool not Operative l 2 3 Check the Display and Backlight function see 7 5 1 Check the Fly Back Converter see 7 5 2 Check the Keyboard function see 7 5 3 7 5 Miscellaneous Functions 7 5 1 Display and Back Ligh
143. h LF the HF path of Input 1 is disabled which results in a 15 kHz bandwidth for both Input channels Miscellaneous Control of the C ASIC e g selecting the attenuation factor is done by the D ASIC via the SDAT and SCLK serial communication lines Circuit Descriptions 3 2 Block Diagram An offset compensation voltage and a trace position control voltage are provided by the D ASIC via the APWM bus The C ASIC s also provide conditioned input voltages on the TRIG A TRIG B line One of these voltages will automatically be selected as trigger source by the T ASIC 3 2 2 Trigger Circuit The T ASIC selects one of the possible trigger sources TRIG A Input 1 or TRIG B Input 2 For triggering on transients the selected trigger source signal is processed via the high pass Trigger Filter TVOUT TVSYNC lines Two adjustable trigger levels are supplied by the D ASIC via the PWM FILTERS TRIGLEV1 and 2 line Depending on the selected trigger conditions source level edge mode the T ASIC generates the final trigger signal TRIGDT which is supplied to the D ASIC The TRIG A input is also used for capacitance measurements see Section 3 2 1 The T ASIC includes a constant current source for resistance and capacitance measurements The current is supplied via the GENOUT output and the relays to the unknown resistance Rx or capacitance Cx connected to Input 1 The SENSE signal senses the voltage across Cx and
144. he 5500A as shown in Figure 4 7 FLUKE 5500A CALIBRATOR ST8003 WMF Figure 4 7 Test Tool Input 1 to 5500A Normal Output 4 Wire 4 25 43 Service Manual 2 SelectOHMS CONTINUITY CAPACITANCE e Press MENU to select the main MENU e Press S to highlight OHMS CONTINUITY CAPACITANCE e Press to select the item 3 Set the 5500A to the first test point in Table 4 8 Use the 5500 2 wire mode for the verifications up to and including 50 For the higher values the 5500A will turn off the COMP 2 wire mode 4 Observe the Input 1 main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to Standby Table 4 8 Resistance Measurement Verification Points 4 6 2 Diode Test Function Test Proceed as follows to test the Diode Test function 1 Connect the test tool to the 5500A as for the previous test see Figure 4 7 2 Select OHMS CONTINUITY CAPACITANCE e Press NU to select the main MENU Press S to highlight OHMS CONTINUITY CAPACITANCE Press Bl to select the item e Press to select DIODE Set the 5500A to 1 Use the 5500A COMP 2 wire mode Observe the main reading and check to see if it is within 0 425 and 0 575V Set the 5500A to IV DC Observe the main reading and check to see if it is within 0 975 and 1 025V When you are finished set the 5500A to Standby
145. hielding bracket with conductive foam strip the shielding foil the dust seal and the display assembly see step 7 are clamped in the top cover edge 6 Install the keypad foil Align the positioning holes in the keypad foil to the positioning pins in the top case 7 Clean the display glass with a moist soft cloth if necessary Install the display assembly Ensure that the display is secured correctly by the four alignment tabs in the top case It is secured correctly when it cannot be moved horizontally 8 Install the keypad pressure plate Press the plate firmly and slide it under the four plastic keeper tabs in the top case 9 Install the main PCA unit and re attach the cables Secure the flat cables in the connectors with the connector latches Twist the backlight wires to minimize interference voltages Insert the shielding flap below the main PCA shielding plate 10 Put the bottom case and the top case together at the flat cable side and hinge the cases to each other This ensures the keypad foil flat cable is folded correctly 11 Install the battery pack and the battery door see figure 6 5 6 8 Disassembling 6 5 Reassembling the Test Tool DUST SEAL SHIELDING FOIL TOPCASE a INTERCONNECTOR PART SHIELDING BRACKET INTERCONNECTOR PART DISPLAY ASSEMBLY SHIELDING BRACKET 5 8185 ST8185 EPS Figure 6 4 Mounting the display shielding
146. hrough the test points When you are finished set the 5500A to Standby Table 4 4 Input 1 and 2 AC Input Coupling Verification Points 5500A output V rms 5500A Frequency Reading 1 Reading 2 4 5 11 Input 1 and 2 Volts Peak Measurements Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to test the Volts Peak measurement function 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 2 Select the AUTO test tool setup e Press NU to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode 3 Select DC coupling amp Peak m m reading for Input 1 and 2 e Press to select menu SCOPE SETUP Press to select Input 1 READING e Press S to highlight Peak m m e Press to confirm L mark changes to Bl e Press S to highlight Input 1 Coupling e Press to select the Input 1 Coupling menu 4 20 Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE e Press S to highlight DC Coupling e Press to confirm L mark changes to Press select Input 2 READING Press to select the Input 2 READING e Press S to highlight Peak m m e Press to confirm L mark changes to Bl e Press S to highlight Input 2 Coupling e Press to select the Input 2
147. in 59 This clamp circuit limits the positive voltage on Cx to 0 45V Now the second part of the measurement is started by reversing the charge current The capacitor will be discharged in the same way as the charge cycle The time between passing both threshold levels is measured again A clamp limits the minimum voltage on to OV Averaging the results of both measurements cancels the effect of a possible parallel resistance and suppresses the influence of mains interference voltages Table 3 5 shows the relation between the capacitance ranges the charge current and the pulse width at full scale Table 3 5 Capacitance Ranges Current and Pulse Width To protect the current source if a voltage is applied to the input a PTC resistor R172 and a protection circuit on the TRIGGER part are provided see Section 3 3 3 Probe Detection The Input 1 and Input 2 safety banana jacks are provided with a ground shield consisting of two separated half round parts One half is connected to ground via the protection PTC resistor R106 R206 Via a 220K resistor installed on the input block the other half is connected to the probe input of the D ASIC pin 54 55 If the shielded STL120 test 3 19 43 Service Manual lead or a BB120 shielded banana to BNC adapter is inserted in Input 1 or Input 2 it will short the two ground shield halves This can be detected by the D ASIC Supply Voltages The SVA 3V3A and 3V3A supply volt
148. ing e Press to confirm L mark changes to Press amp to select Input 2 READING Press to select the Input 2 READING e Press S to highlight ACrms e Press to confirm L mark changes to e Press S to highlight Input 2 Coupling e Press to select the Input 2 COUPLING e Press S to highlight AC Coupling e Press to confirm L mark changes to e Press to return to SCOPE Select the appropriate sensitivity for the test tool Press select RANGE 1 or RANGE 2 e Press to select RANGE 1 or press to select RANGE 2 e Press S to select the ranges mentioned in the table Select the appropriate timebase setting for the test tool e Press when RANGE RANGE 1 or RANGE 2 is not highlighted e Press 20 to select Set the 5500A to source the appropriate AC voltage Observe the Input 1 and Input 2 main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to Standby Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE Table 4 3 Volts AC Measurement Verification Points Sensitivity Time 5500A output 5500A Reading 1 amp 2 base Volts rms p 200 mV div 200A div 10 ms d 500 mV 494 0 to 506 0 494 0 to 506 0 20 500 mV 20 kHz 486 0 to 514 0 o gt 4 2V div 2kA div 20 20 kHz 4 860 to 5 140 FEE 10 ms d 4 940 to 5 060 4 940 to 5 060 20 20kA div 10 ms d ae 49 40 to
149. light DC Coupling e Press to confirm L mark changes to Bl e Press to return to SCOPE 4 Set the 5500A to source a sine wave to the first test point in Table 4 6 NORMAL output WAVE sine 5 Observe the Input 1 and Input 2 main reading and check to see if it is within the range shown under the appropriate column 6 When you are finished set the 5500A to Standby Table 4 6 Phase Measurement Verification Points 5500A output Vrms sine 5500A Frequency Reading 1 amp 2 4 5 13 Input 1 and 2 High Voltage AC amp DC Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to test the Input 1 amp 2 High Voltage DC Accuracy 1 Connect the test tool to the 5500A as shown in Figure 4 6 4 22 Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE FLUKE 5500A CALIBRATOR ST8129 WMF Figure 4 6 Test Tool Input 1 B to 5500A Normal Output for gt 300V Select the AUTO test tool setup e Press to select the MENU Press till SCOPE is highlighted e Press to select SCOPE mode Select DC coupling amp reading for Input 1 and 2 e Press to select menu SCOPE SETUP Press to select Input 1 READING e Press amp to highlight DC e Press to confirm
150. lt 300 5 11 5 4 Ohm Gain Calibration Points eese eee en ener nnne nnns 5 13 7 1 Starting Fault Einding ia ether een ire 7 4 8 1 Final Assembly Parf usu s aaa ette sun ala s s zS 8 4 8 22 en ter Ae RE aqasha a 8 6 8 3 aci 8 7 9 1 Parts Location Main Side 1 eese eene enne 9 4 9 2 Parts Location Main PCA 5 2 00242002 000 00 9 5 List of Figures Figure Title Page 2 1 Max Input Voltage vs Frequency 2 4 3 Bl ke43 Block Diagram u aaa reed rette reti tee nne 32 3 2 Fluke 43 Start up Sequence Operating Modes 3 8 3 3 Power Supply Block Diagram ener 3 9 3 4 CHAGATE Control Voltage sese 3 11 3 5 Fly Back Converter Current and Control Voltage 3 12 3 6 Fly Back Converter Block Diagram rennen 3 13 3 7 Back Light Converter Voltages sees eene 3 14 3 8 ASIC Block Diagram deb ET e E I aves 3 15 3 9 Capacitance Measurement eerte enne nnne enne nennen 3 19 3 10 T ASIC Trigger Section Block
151. m the Input and Input 2 voltage samples 3 3 43 Service Manual The Input 1 and Input 2 measurement circuits are partially identical The differences are e Only Input 1 provides facilities for Ohms Continuity Diode and Capacitance measurements The bandwidth of the Input 1 circuit is 20 MHz the bandwidth of Input 2 is 15 kHz Input 2 has an additional hum rejection circuit The circuit description below applies to the Input 1 and Input 2 circuit Input 1 and Input 2 measurement principle An input voltage applied to Input 1 or Input 2 is supplied to the C ASIC via the HF path Input 1 only and the LF path Depending on the actual measurement function the Input 1 HF path in the C ASIC is enabled or disabled The HF DECade ATTenuator and LF DECade ATTenuator are external components for the HF and LF path The C ASIC converts attenuates amplifies the input signal to a normalized output voltage ADC A ADC B which is supplied to the Analog to Digital Converters ADC A and ADC B on the DIGITAL part The D ASIC acquires the digital samples to build the traces and to calculate readings For the electrical functions the current Input 2 circuit is operating in low voltage ranges For example a current of 10A measured with a 1 mV A current clamp generates 10 mV voltage range 10 mV div To minimize the influence of interference voltages Input 2 has no HF path and has an additional hum reject circuit The lowest Input 1 vol
152. mbly is accompanied by an illustration showing the location of each part and its item number or reference designator The parts list gives the following information e number or reference designator for example 122 e An indication if the part is subject to static discharge the symbol e Description Ordering code Caution A symbol indicates a device that may be damaged by static discharge 8 2 How to Obtain Parts Contact an authorized Fluke service center To locate an authorized service center refer to the second page of this manual back of the title page In the event that the part ordered has been replaced by a new or improved the replacement will be accompanied by an explanatory note and installation instructions if necessary To ensure prompt delivery of the correct part include the following information when you place an order e Instrument model Fluke 43B 12 digit instrument code 9444 and serial number DM The items are printed on the type plate on the bottom cover e Ordering code e tem number Reference designator e Description e Quantity 8 3 43 Service Manual 8 3 Final Assembly Parts See Table 8 1 and Figure 8 1 for the Final Assembly parts Table 8 1 Final Assembly Parts top case assembly Fluke 43B 4022 244 98361 Window decal Fluke 43 4022 243 09841 shielding foil 5322 466 11434 dust seal 5322 466 11435 conductive foam strip 5322 46
153. ne 7 4 7 8 Charger CIrCUIt y n hoop rtp rr RT 7 4 7 4 Starting with a Dead Test Tool sse 7 6 7 4 1 Test Tool Completely Dead sse 7 6 7 4 2 Test Tool Software Does not Run sese 7 7 7 4 3 Software Runs Test Tool not Operative 7 7 7 5 Miscellaneous Functions eese 7 7 7 5 1 Display and Back 1 12 41 02000000000000000000000000000504 7 7 15 2 Fly Back Converter tate e E tre 7 8 osi sc 7 9 PIA Keyboard au dete eerte tete etie oeste re enses 7 10 7 5 5 Optical Port Serial RS232 Interface 7 11 7 5 6 Input Channel 1 and 2 Voltage Measurements 7 11 7 5 7 Ohms and Capacitance Measurements 7 12 7 5 8 Trigger Functions ener 7 13 7 5 9 Reference Voltages cete mtt eren etie reris 7 14 72510 B zzer Carcuit i inea umet at dane 7 14 7 5 11 Reset ROM Line 8 2 4 00000 0 7 14 Test a a l Lu q IU TE 7 14 Pwet ON OFF 7 15 3 5 WAP WINE SAN CHI 7 15 7 5 15 Randomize Cir
154. o start the calibration 10 Wait until the display shows Cap High CL 910 READY 11 Set the 5500A to Standby 12 Continue at Section 5 6 7 5 6 7 Capacitance Clamp amp Zero Proceed as follows to do the Capacitance Clamp Voltage amp Zero calibration 1 2 3 Press select calibration adjustment step Cap Clamp 0940 IDLE Remove any input connection from the test tool open inputs Press to start the calibration The capacitance measurement clamp voltage Cap Clamp CL 0940 and the zero of the capacitance ranges Cap Zero CL 0950 Cap Zero CL 0953 will be calibrated now Wait until the display shows Cap Zero CL 0953 READY Continue at Section 5 6 8 5 6 8 Capacitance Gain Proceed as follows to do the Capacitance Gain calibration l 2 3 Press to select calibration adjustment step Cap Gain CL 0960 IDLE Connect the test tool to the 5500A as shown in Figure 5 8 Set the 5500A to 500 nF Calibration Adjustment 85 7 Save Calibration Data and Exit Set the 5500A to operate OPR Press to start the calibration Wait until the display shows Cap Gain CL 0960 READY PUn Aim Continue at Section 5 7 to save the calibration data 5 7 Save Calibration Data and Exit Proceed as follows to save the calibration data and to exit the Maintenance mode 1 Remove all test leads from the test tool inputs 2 Press EXIT The test tool will display Calibration data are
155. o the fourth division Press to toggle to the right cursor Press 20 to move the right cursor to the fifth division Observe the readings and verify that they are between 1 38 and 1 62 kA When you are finished set the 5500A to Standby 4 8 Sags amp Swells Proceed as follows to test the sags amp swells mode 2 3 4 FLUKE 5500A CALIBRATOR PM9081 PM9093 PM9091 001 1 5m 9092 001 0 5m ST8001 WMF Figure 4 9 Test Tool Input 1 amp 2 5500A Normal Output Connect the test tool to the 5500A as shown in Figure 4 9 Press Press S to highlight SAGS amp SWELLS Press to enter mode Now the RECORD TIME is highlighted If the time is not 4 minutes then l 2 3 Press Press S to highlight 4 minutes Press to confirm L mark changes to 4 29 43 Service Manual SrA SpA Set the 5500A to source a sine wave of 5V 60Hz NORMAL output MODE wave sine Press S to highlight START Press After approximately 30 seconds press Press 20 move the cursor into measured region Check the readings MAX V MIN of Input 1 is between 4 80 and 5 20 10 Check the readings MAX A MIN of Input 2 is 4 80 and 5 20 11 When you are finished set the 5500A to Standby 4 9 Harmonics Proceed as follows to test HARMONICS l 2 d cg m Os Connect the test tool to the 5500A as for the previous test shown in Figure 4 9 Press
156. on the supplied data and the M ultiplex signal The M signal back plane modulation is used by the LCD drivers to supply the various DC voltages in such an order that the average voltage does not contain a DC component A DC component in the LCD drive voltage may cause memory effects in the LCD The LCD contrast is controlled by the CONTRAST voltage This voltage is controlled by the D ASIC which supplies a PWM signal pin 37 CONTR D to PWM filter R436 C436 The voltage REFPWMI is used as bias voltage for the contrast adjustment circuit on the LCD unit To compensate for contrast variations due to temperature Circuit Descriptions 3 3 3 Detailed Circuit Descriptions variations a temperature dependent resistor is mounted in the LCD unit It is connected to the LCDTEMPI line The resistance change which represents the LCD temperature 1s measured by the D ASIC via the S ADC on the POWER part The back light lamp is located at the left side of the LCD so this side becomes warmer than the right side As a result the contrast changes from left to right To eliminate this unwanted effect the CONTRAST control voltage is increased during building up a screen image A FRAME pulse starts the new screen image The FRAME pulse is also used to discharge C404 After the FRAME pulse the voltage on C404 increases during building up a screen image Keyboard Control ON OFF Control The keys are arranged in a 6 rows x 6 columns matrix If a key is presse
157. ot correct check TP432 RAMPCLK for 3V 200 ns pulses TP332 RAMPCLK for 0 6V 200 ns pulses TP331 RSTRAMP for pulses with varying pulse with and repetition rate All pulses are supplied by D ASIC D471 Check TP310 REFATT for alternating 1 2V and 1 2V pulses The repetition time depends on the time base and is for example 9 s at 20 ms div Check the SCLK and SDAT lines for 3 3V pulse bursts C ASIC pin 25 and 26 Check TP437 Sample clock for a 5 MHz time base 2 1 ms div or 25 MHz clock signal 3 3V Check TP301 REFADCT for 1 62V and TP302 REFADCB for 0 12V Check the ADC supply voltages VDDAA VDDDA VDDBB VDDDB and fort 3 3V Check TP401 and TP451 for 7 5 7 Ohms and Capacitance Measurements 1 Press and select OHMS CONTINUITY CAPACITANCE Press Ohms Connect a current meter between Input 1 and the COM input Select the various Ohms ranges and verify that the current approximately matches the values listed in Corrective Maintenance 7 7 5 Miscellaneous Functions the table below If not correct the protection circuit or the current source in the T ASIC N301 may be defective If the current is correct and the Volt function is correct so ADC is correct then the Ohms part in the C ASIC is defective replace N101 D 500 range is only available in the Continuity measurement function The current in the Diode measurement function must be 500 uA
158. r level is the top of the trigger icon J Set the 5500A to source 0 4V DC e Press to select menu SCOPE SETUP e Press S to highlight Time base e Press select the TIME BASE menu e Press e to select SINGLE e Press to confirm L mark changes to e Press S to highlight Trigger slope Press select the TRIGGER SLOPE menu Press S to highlight positive trigger J e Press to confirm changes to e Press to return to SCOPE Verify that no trace is shown on the test tool display and that at the upper right corner of the display HOLD is not shown If the display shows HOLD then press Hold should disappear and the test tool is re armed for a trigger Increase the 5500 voltage slowly 0 1V steps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test set the 5500A to and start at step 5 Set the 5500A to Standby Press to clear the display Select negative TRIGGER SLOPE Press to select menu SCOPE SETUP e Press S to highlight Trigger slope Press to select the TRIGGER SLOPE menu e Press S to highlight negative trigger 1 e Press to confirm L mark changes to e Press to return to SCOPE Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE 11 Set the 5500A to source 3V DC 12 Set the
159. r you must follow special precautions when reassembling the main PCA unit 1 Ensure the input banana jacks have the rubber sealing ring in place Input 1 2 item 9 COM input item 10 see Figure 4 6 2 Do not forget to install the power connector insulator item 3 and the LED holder item 6 3 Notice the correct position of the shielding box main PCA notice the shielding plates on the PCA and shielding plate as shown in Figure 6 2 The tabs of the shielding plate must be inside both shields 6 5 Reassembling the Test Tool Reassembling the test tool is the reverse of disassembly However you must follow special precautions when reassembling the test tool Refer also to figure 6 1 Reassembling procedure for a completely disassembled unit 1 Clean the inside of the lens with a moist soft cloth if necessary Keep the lens free of dust and grease 2 Install the keypad Press the edge of the keypad into the sealing groove of the top case Ensure that the keypad lays flat in the top case and that all keys are correctly seated 3 Install the shielding foil item 2 Remove the protection foil from the shielding foil by pulling it off in one rapid movement If you pull it off slowly the protection foil may crack Keep the shielding foil free of dust and grease 4 Install the dust seal item 3 Install the display shielding bracket item 5 provided with the conductive foam strip item 4 Note Figure 6 4 shows how the s
160. ress a three times to select the first calibration step The display shows Contrast CL 0100 MANUAL Press CAL The display will show a dark test pattern see Figure 5 2 Using adjust display to the maximum darkness at which the test pattern 15 only just visible Press to select the default contrast calibration The display shows Contrast CL 0110 MANUAL Press CAL The display shows the test pattern at default contrast Using set display to optimal becomes default contrast Press to select maximum brightness calibration The display shows Contrast CL 0120 MANUAL Press CAL The display shows a bright test pattern Using adjust display to maximum brightness at which the test pattern is only just visible You can now e Exit if only the Contrast had to be adjusted Continue at Section 5 7 OR e Do the complete calibration Press to select the next step Warming Up and continue at Section 5 5 Calibration Adjustment 5 5 Warming Up amp Pre Calibration Figure 5 2 Display Test Pattern 5 5 Warming Up amp Pre Calibration After entering the Warming Up amp Pre Calibration state the display shows WarmingUp CL 0200 IDLE valid or invalid You must always start the Warming Up amp Pre Calibration at Warming Up CL0200 Starting at another step will make the calibration invalid Proceed as follows 1 Remove all input connections from the test tool 2 Press to
161. rossing depends on the value of Cx The resulting pulse is supplied to the TRIGGER output pin 29 which is connected to the analog trigger input of the T ASIC TRIG A signal The T ASIC adjusts the pulse to an appropriate level and supplies it to the D ASIC via its ALLTRIG output The pulse width is measured and processed by the D ASIC and represented on the LCD as numerical reading There will be no trace displayed Circuit Descriptions 3 3 3 Detailed Circuit Descriptions pos clamp active refclamp 1 th2 th1 1 neg clamp active neg active TRIG A Figure 3 9 Capacitance Measurement T ASIC supplies a positive charge and a negative discharge current measurement cycle starts from a discharged situation U cx 0 with a charge current After reaching the first threshold level th the pulse width measurement is started The dead zone between start of charge and start of pulse width measurement avoids measurement errors due to a series resistance of Cx The pulse width measurement is stopped after crossing the second threshold level th the completes the first part of the cycle Unlimited increase of the capacitor voltage is avoided by the positive clamp in the T ASIC The output of the high impedance buffer in the C ASIC supplies a replica of the voltage across Cx to output pin 23 ADDRESS Via R165 this voltage 1s supplied to a clamp circuit in the T ASIC SENSE p
162. roval UL3111 1 including approval Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use This manual contains information and warnings that must be followed by the user to ensure safe operation and to keep the instrument in a safe condition Use of this equipment in a manner not specified by the manufacturer may impair protection provided by the equipment Performance Characteristics FLUKE guarantees the properties expressed in numerical values with the stated tolerance Specified non tolerance numerical values indicate those that could be nominally expected from the mean of a range of identical ScopeMeter test tools Environmental Data The environmental data mentioned in this manual are based on the results of the manufacturer s verification procedures 2 2 Safety Specifications Safety Characteristics Designed and tested for measurements on 600 Vrms Category IIL Pollution Degree 2 in accordance with EN 61010 1 1993 1010 1 ANSI ISA S82 01 1994 e CAN CSA C22 2 No 1010 1 92 including approval e UL3111 1 including approval Installation Category refers to distribution level and fixed installation circuits inside a building Maximum input voltage Input 1 and 2 Direct on inputs or with test leads TL24 see Figure 2 1 040 66 sawaka nn Robe edd Deeg ete eae ert Re Wane 600 Vrms 2 gt 66
163. ry circuit is defective Install a new LCD unit If this does not cure the problem check the resistance between T600 10 and 11 for 300Q replace V603 V605 b Check T600 pin 3 and pin 5 for a 8 Vpp 66 kHz half rectified sine wave If it is present on only pin 3 or pin 5 then replace V601 c Check TP601 and TP602 for a 7Vpp 66 kHz square wave If not correct then check TP604 TLON for 3V3 If TLON is correct then replace N600 d Check replace V600 V602 Backlight brightness control not correct brightness increases if a power adapter is connected Check the TP605 BACKBRIG supplied by D ASIC D471 for a 25 kHz 3 3 V pulse signal The duty cycle of the pulses controls the back light brightness The backlight brightness increases with an increasing length of the high pulse Check V604 R604 7 5 2 Fly Back Converter l Check the voltages on TP572 5V TP573 3 3V 574 3 3V 576 3 3V TP577 30V on the POWER part a more voltages are correct then check the rectifier diodes V561 V564 and coils L562 L567 of the incorrect voltage b Ifnone ofthe voltages is correct then the fly back converter does not run correctly continue at step 2 Check TP504 for gt 4 8 Corrective Maintenance 7 7 5 Miscellaneous Functions 3 Check TP552 FLYGATE for a square wave voltage of at least some volts for a correct Fly Back Converter 50 100 kHz 10 Vpp
164. s supplied by the T ASIC via R144 for calibration of the resistance and capacitance measurement function For ICAL see also Section 3 3 3 POS input pin 1 The PWM circuit on the Digital part provides an adjustable voltage 0 to 3 3 V to the POS input via R151 The voltage level is used to move the input signal trace on the LCD The REFN line provides a negative bias voltage via R152 to create the correct voltage swing level on the C ASIC POS input OFFSET input pin 44 The PWM circuit on the Digital part supplies an adjustable voltage 0 to 3 3 V to the OFFSET input via R153 The voltage level is used to compensate the offset in the LF path of the C ASIC The REFN line provides a negative bias voltage via R152 to create the correct voltage swing level on the C ASIC POS input Circuit Descriptions 3 3 3 Detailed Circuit Descriptions DACTEST output pin 24 As described above the DACTEST output is used for signaling a ground protect error It can also be used for testing purposes Furthermore the DACTEST output provides a C ASIC reset output signal 1 75V after a power on ADDRESS output pin 23 The output provides a replica of the input voltage to the SENSE line via R165 In capacitance mode the sense signal controls the CLAMP function in the T ASIC See Section 3 3 3 TRACEROT input pin 31 The TRACEROT signal is supplied by the T ASIC It is a triangle sawtooth voltage SDAT SCLK Control information for the C ASIC e g s
165. s is done in the following way SIGNAL 5 C2 Figure 9 1 Circuit Diagram 1 Figure 9 5 Circuit diagram 5 The line SIGNAL on circuit diagram 1 location B3 1 B3 is connected to the line SIGNAL on circuit diagram 5 location C2 5 C2 If the signal is referred to a location on the same circuit diagram the circuit diagram number is omitted 9 2 Schematic Diagrams The tables below show where to find the parts on the Main PCA circuit diagrams and assembly drawings Separate tables are created for the Main PCA side 1 and side 2 assembly drawing B402 C4 4 710 indicates that part B402 can be found in location C4 on the Main PCA side 1 drawing circuit diagram part 4 location J10 9 3 43 Service Manual Table 9 1 Parts Location Main PCA Side 1 Table 9 2 Parts Location Main Side 2 Circuit Diagrams 9 2 Schematic Diagrams 2 A A A A A A A 5 4 4 4 5 5 3 3 4 4 4 5 4 5 5 5 5 5 3 3 4 4 3 4 4 5 5 8 8 8 8 7 8 8 7 T 7 8 8 1 1 7 9 2 7 9 4 3 3 4 4 5 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
166. sesesseeeeeeeeeennnennn nnns 5 8 5 4 5500 Scope Output to Input 1 enne 5 10 5 5 Volt Gain Calibration Input Connections lt 300V 5 11 5 6 Volt Gain Calibration Input Connections 500 22 5 12 5 7 Four wire Ohms calibration connections esses 5 13 5 8 Capacitance Gain Calibration Input Connections 5 14 6 1 Fluke 43 Main Assembly eere enne 6 4 vii 43 Service Manual 6 2 6 3 6 4 7 1 8 1 9 1 9 2 9 3 9 5 9 6 9 8 Flex Cable Connectors zeros tree reete eei tese ise e Speed aea tri 6 5 Main PCA Unit Assembly tette cete nt edt ce caus iae ee ents 6 7 Mounting the display shielding bracket 41 2002000 2 20 0 000 000000000004 6 9 Battery pack installation esses 6 9 Operative Test Tool without Case essen 7 3 49 Final Assembly ice tette metet ta tates eret eg 8 5 Main PCA Unit estet ER ee RR a eres Toto Pr 8 6 Circuit Diagram 1 Channel 1 Circuit sess 9 7 Circuit Diagram 2 Channel 2 Circuit seen 9 8 Circuit Diagram 3 Trigger nennen 9 9 Circuit Diagram 4 Digital Circuit ener 9 10 Circuit Diagram 4 cont
167. shed set the 5500A to Standby Table 4 11 Power Measurement Verification points 2 1 1 4 472 60 2 4 472 60 2 19 4 20 6 19 4 20 6 0 96 1 00 0 97 1 00 59 5 60 5 5 916V 60Hz 5 916V 60Hz 34 3 35 7 34 3 35 7 0 96 1 00 0 97 1 00 59 5 60 5 43 Service Manual 4 12 Transients Proceed as follows to test the TRANSIENTS function 1 Connect the test tool to the 5500A as show in Figure 4 12 FLUKE 5500A CALIBRATOR PM9091 001 1 5m 9092 001 0 5m ST8586 WMF 2 Press 3 Press to highlight TRANSIENTS 4 Press to select the TRANSIENTS mode VOLTAGE CHANGE will be highlighted continue with 1 Press Press to select 20 Press to confirm L mark changes to Mr Press e to select START Set the 5500A to 20V 60Hz NORMAL output WAVE sine Press to start the test No transients should be captured Set the 5500A to 22 5V gor Seer VAL SER Now transients should be captured After 40 transients maximum the 40th transient will be visible 9 When you are finished set the 5500A to Standby 4 32 Chapter 5 Calibration Adjustment Title Page S Generalis re dentem pere 5 3 5 1 1 Introd ction ioni re et e pt t FE eee e eiie 5 3 5 1 2 Calibration number and 4 1 044000244420000004000000000000000055041 5 3 5 1 3 General Instructions sese eene enne nnns 5 4 5 2 Equipment Required For Calibration
168. sistor R513 VBATHIGH pin 7 It compares the voltage on R513 to the battery voltage VBAT on pin 3 after being attenuated in the P ASIC The P ASIC limits the voltage VBAT to 7 4V via its internal Control circuit This happens if no battery or a defective battery open is present Charger Converter input current This input current is sensed by R501 The P ASIC supplies a reference current to R514 The P ASIC compares the voltage drop on R501 P ASIC pin 14 and 15 to the voltage on R514 IMAXCHA pin 6 It limits the input current e g when loading C503 C555 just after connecting the power adapter via its internal Control circuit CHAGATE control signal To make the FET conductive its Vgs gate source voltage must be negative For that purpose the CHAGATE voltage must be negative with respect to VCHDRIVE The P ASIC voltage VCHDRIVE also limits the swing of the CHAGATE signal to 13V VCHDRIVE EN V506 OFF VCHDRIVE 13V I 506 4 10 us Figure 3 4 CHAGATE Control Voltage 3V3GAR Voltage When the test tool is not turned on the Fly Back Converter does not run In this situation the 3 V3GAR voltage for the D ASIC the FlashROM and the RAM is supplied via transistor V569 The voltage is controlled by the VGARDRV signal supplied by the P ASIC pin 69 The current sense voltage across R580 is supplied to pin 70 VGARCURR The voltage 3 V3GAR is sensed on pin 66 for regulation The intern
169. ss and release to turn the test tool on HOLD RUN Walt until the test tool has beeped twice and then release When the test tool has beeped twice the RESET was successful Proceed as follows to test the display and the backlight 2 3 4 5 Press to turn the test tool on Remove the adapter power and verify that the backlight is dimmed Apply the adapter power and verify that the backlight brightness is set to maximum Press to leave the STARTUP screen Press and hold Eq Press and release Release 26 test tool shows calibration menu the bottom of the display Do not press now If you did press twice to turn the test tool off and on and start at 4 Press PREV three times The test tool shows Contrast CL 0100 MANUAL Press CAL The test tool shows a dark display the test pattern as shown in Figure 4 1 may not be visible or hardly visible Observe the display closely and verify that no light pixels are shown Figure 4 1 Display Pixel Test Pattern 11 12 13 14 15 Performance Verification 4 5 Input 1 and Input 2 Tests in the SCOPE MODE Press The test pattern is removed the test tool shows Contrast CL 0110 MANUAL Press CAL The test tool shows the display test pattern shown in Figure 4 1 at default contrast Observe the test pattern closely and verify that the no pixels with abnormal contrast are present in the display pattern squares
170. start the Warming Up amp Pre Calibration The display shows the calibration step in progress and its status The first step is WarmingUp CL0200 BUSY 00 29 59 The warming up period is counted down from 00 29 59 to 00 00 00 Then the other pre calibration steps are performed automatically The procedure takes about 60 minutes 3 Wait until the display shows End Precal READY 4 Continue at Section 5 6 5 6 Final Calibration You must always start the Final Calibration at the first step of Section 5 6 1 Starting at another step will make the calibration invalid If you proceeded to step N for example step CL 0615 then return to a previous step for example step CL 0613 and then calibrate this step the complete final calibration becomes invalid You must do the final calibration from the beginning step CL 0600 again You can repeat a step that shows the status READY by pressing again 5 7 43 Service Manual 5 6 1 HF Gain Input 1 Proceed as follows to do the HF Gain Input 1 amp 2 calibration 1 Press to select the first calibration step in Table 5 1 HFG amp FI AB CL 0600 2 Connect the test tool to the 5500A as shown in Figure 5 3 Do NOT use a 500 termination FLUKE 5500A CALIBRATOR PM9093 PM9091 001 oem 9092 001 0 5m ST8097 WMF Figure 5 3 HF Gain Calibration Input Connections 3 Set the 5500A to source a 1 kHz fast rising edge square wave Output SCOPE MODE edge
171. t A Warning The voltage for the LCD back light fluorescent lamp is gt 400 l Connect another LCD unit to see if the problem is caused by the LCD unit The unit 18 not repairable Defective display Check the LCD control signals on measure spots MS401 MS422 near to X453 Use a 10 1 probe with ground lead on the probe connected to the metal screening of the UUT Notice that MS407 is missing a MS422 LCDONOFF for 3 3V b MS420 DATACLKO for 120 ns pulses MS414 415 LCDATO 1 for 250 ns pulses 7 7 43 Service Manual 7 8 MS417 418 LCDAT2 3 for 250 ns pulses MS412 LINECLK for 120 ns pulses 16 kHz MS411 FRAME for 250 ns pules 66Hz MS409 M for a 625Hz square wave c MS406 5VA for 5V MS405 3V3D for 3 3V MS401 30VD for 30V from Fly Back Converter d MS404 REFPWMI for 3 3V Bad contrast a Check MS403 CONTRAST see Figure below J 50 08V 4 15 ms If not correct check FRAME signal V401 for 0 3V 250 ns pulses 66Hz check PWM circuit 7 5 14 check V401 V403 b Check MS408 LCDTEMP1 for 1 6V at room temperature to SLOW ADO If not correct check R591 in SLOW ADC part Defective backlight a Turn the test tool on and monitor the voltage on T600 pin 3 or pin 5 fora 8 Vpp 66 kHz half rectified sine wave If a half rectified sine wave with an increasing amplitude is only seen for about 0 2 second directly after power on then the seconda
172. t Check TP307 N501 pin 72 REFP for 1 22V If not correct check V301 R307 b Check R528 loose pin 74 or N501 defective Check N501 pin 51 VOUTHI for 2 5V nominal value 1 65V If not correct check R558 and connections to N501 check IREF see step 6 Check N501 pin 57 IMAXFLY for 250 mV If not correct check R559 and connections to N501 check IREF see step 6 7 5 3 Slow ADC Check the following signals l BATCUR N501 pin 77 must be 1 63 6 7 x IBATP Volt If not correct replace N501 Measure IBATP on X503 pin 3 7 N501 pin 9 IBATP senses the battery current BATVOLT 3501 pin 78 must be 0 67 x VBAT 3 27 Volt If not correct replace N501 Measure VBAT on TP504 N501 pin 3 VBAT senses battery the voltage BATTEMP 3501 pin 79 must be TEMP IBATP Volt If not correct replace N501 7 9 43 Service Manual Measure TEMP N501 pin 5 503 6 TEMP senses the battery temperature Measure IBATP on X503 pin 3 N501 pin 9 IBA TP senses the battery current 4 3V3SADC must be 3 3V supplied by N501 pin 65 If not correct check if the 3V3SADC line is shorted to ground If it is not then replace N501 5 SELMUXn TP591 TP592 TP593 supplied by the D ASIC must show LF pulses to 3 3V 0 5 3 seconds period 6 Check TP536 537 and TP534 for signals shown below typical examples measured signals may have different pulse amplitude and repetition rate TP5
173. tage range for electrical measurements is 4V div which is high in comparison with the Input 2 range Ohms Continuity and Diode measurement function Input 1 only The T ASIC supplies a current via the Q F relays to the unknown resistance Rx or diode connected to the Input 1 and the COM input jacket The voltage drop across Rx or the diode is measured according to the Input 1 measurement principle Capacitance measurement function Input 1 only The T ASIC supplies a current via the Q F relays to the unknown capacitance Cx connected to the Input 1 and the COM input jacket Cx 1s charged and discharged by this current The C ASIC converts the charging time and the discharging time into a pulse width signal This signal is supplied to the T ASIC via the C ASIC trigger output TRIG A The T ASIC shapes and levels the signal and supplies the resulting pulse width signal ALLTRIG to the D ASIC The D ASIC counts the pulse width and calculates the capacitance reading Scope measurement function In the Scope measurements function the test tool shows the traces and readings derived from the input signals The Input 1 HF path is enabled which results in a 20 MHz bandwidth The Input 2 bandwidth is 15 kHz Other measurement functions Volts Amperes Hertz LF Power LF Harmonics LF Sags amp Swells LF Transients Inrush Current LF and Temperature measurement results are calculated from acquired input voltage samples For functions wit
174. te proces being disabled before all data have been written PCB version 3 up only Display Control The LCD unit includes the LCD the LCD drivers and the fluorescent back light lamp It is connected to the main board via connector X453 The LCD is built up of 240 columns of 240 pixels each 240x240 matrix The D ASIC supplies the data and control signals for the LCD drivers on the LCD untt Figure 3 13 Common Driver Common Driver M M m X81 160 161 240 Di Do FRAME Common Driver LnCl TOP FRONTVIEW LCD LCDAT0 3 DATACLKO LINECLK M PIXEL 0 0 Figure 3 13 LCD Control Each 14 ms the LCD picture is refreshed during a frame The frame pulse FRAME indicates that the concurrent LINECLK pulse is for the first column The column drivers must have been filled with data for the first column Data nibbles 4 bit are supplied via lines LCDATO LCDAT3 During 20 data clock pulses DATACLKO the driver for Y161 240 is filled When it is full it generates a carry to enable the driver above it which is filled now When a column is full the LINECLK signal transfers the data to the column driver outputs Via the common drivers the LINECLK also selects the next column to be filled So after 240 column clocks a full screen image is built up The LCD unit generates various voltage levels for the LCD drivers outputs to drive the LCD The various levels are supplied to the driver outputs depending
175. tep set the 5500A to the next calibration point and start the calibration Continue through all calibration points When you are finished set the 5500A to Standby 9 Continue at Section 5 6 6 9o Table 5 4 Ohm Gain Calibration Points Gain Ohm CL 0860 Pos CL 0920 Cap Neg CL 0921 Gain Ohm CL 0861 Pos CL 0922 Cap Neg CL 0923 Gain Ohm CL 0862 Pos CL 0924 Cap Neg CL 0925 Gain Ohm CL 0863 Cap Pos CL 0926 Cap Neg CL 0927 100 kO Gain Ohm CL 0865 Gain Ohm CL 0866 2 10 D The capacitance measurement current calibrations Cap Pos and Cap Neg are done automatically after the Gain Ohm calibration The Gain Ohm CL0866 calibration step is done automatically after the Gain Ohm CL0865 calibration 5 6 6 Capacitance Gain Low and High Proceed as follows to do the Capacitance Gain calibration l Press to select calibration adjustment step Cap Low CL 0900 IDLE 2 Connect the test tool to the 5500A as shown in Figure 5 8 5 13 43 Service Manual Oo 100 So UM FLUKE 5500A CALIBRATOR ST8002 WMF Figure 5 8 Capacitance Gain Calibration Input Connections Set the 5500A to supply 250 mV DC Set the 5500A to operate OPR Press to start the calibration Wait until the display shows Cap Low CL 0900 READY Press to select calibration adjustment step Cap High CL 0910 IDLE Set the 5500A to supply 50 mV DC Press t
176. teps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test set the 5500A to 0 4V and start at step 5 Set the 5500A to Standby Press to clear the display Select negative TRIGGER SLOPE Press to select menu SCOPE SETUP e Press S to highlight Trigger slope e Press to select the TRIGGER SLOPE menu Press amp to highlight negative trigger L e Press to confirm L mark changes to e Press to return to SCOPE Set the trigger level to 2 divisions from the screen center For negative slope triggering the trigger level is the bottom of the trigger icon L e Press to select TRIGGER e Using S set the trigger level to 2 divisions from the screen center Set the 5500A to source 3V DC Verify that no trace is shown on the test tool display and that at the upper right corner of the display HOLD is not shown If the display shows HOLD then press Hold should disappear and the test tool is re armed for a trigger Decrease the 5500A voltage slowly in 0 1V steps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown 43 Service Manual 4 12 17 Verify that the 5500 voltage is between 1 5V and 2 5V when the test tool 15 triggered To repeat the test start at step 12 18 When you are finished set the 550
177. the last time this step was done the calibration process was successful It does not necessarily mean that the unit meets the specifications related to this step IDLE invalid After re entering this step the calibration process is not started The calibration data are invalid This means that the unit will not meet the specifications if the calibration data are saved BUSY bbb Calibration adjustment step in progress progress for Input 1 and Input 2 READY Calibration adjustment step finished Error xxxx Calibration adjustment failed due to wrong input signal s or because the test tool is defective The error codes xxxx are shown for production purposes only 5 5 43 Service Manual 5 6 Functions of the keys 1 are 8 PREV select the previous step NEXT select the next step CAL startthe calibration adjustment of the actual step EXIT leave the Maintenance mode Readings and traces After completing a calibration step readings and traces are shown using the new calibration data 5 4 Contrast Calibration Adjustment After entering the Maintenance mode the test tool display shows Warming Up CL 0200 IDLE valid Do not press now If you did turn the test tool off and on and enter the Maintenance mode again Proceed as follows to adjust the maximum display darkness CL0100 the default contrast CL0110 and the maximum display brightness CL0120 1 10 P
178. the same time temperature drift as the GENOUT measurement current it can be used for internal calibration of the resistance and capacitance measurement function Capacitor C356 is used for hum noise suppression Circuit Descriptions 3 3 3 Detailed Circuit Descriptions Reference Voltage Circuit This circuit derives several reference voltages from the 1 23 V main reference source 3 3V REFPAM 73 lt H 1 23V 3 3V 1 23V 0 1V 1 6V Figure 3 12 Reference Voltage Section The output of an amplifier in the P ASIC supplies a current to the 1 23 V reference source V301 via R307 The 3 3 V REFPWM2 voltage is used as reference for the PWMB outputs of the D ASIC on the Digital part The 1 23 V REFP voltage is used as main reference source for the reference circuit This circuit consists of four amplifiers in the T ASIC external gain resistors and filter capacitors Amplifier 1 and connected resistors supply the REFPWMI reference voltage This voltage is a reference for the PWMA outputs of the D ASIC on the Digital section It is also used as reference voltage for the LCD supply on the LCD unit Amplifier 2 and connected resistors supply the 1 23 V REFN reference voltage used for the trigger level voltages TRIGLEV 1 amp 2 the C ASIC POS A and POS B voltages and the C ASIC OFFSET A and OFFSET B voltages REFN is also the input reference for amplifiers 3 and 4 3 23 43 Service Manual Amplifier 3
179. the P ASIC output pin 12 and the line MAINVAL are low This signal on pin 12 is also supplied to the P ASIC internal control circuit which then makes the CHAGATE signal high As a result FET V506 becomes non conductive and the Charger Converter is off Battery charge current control The actual charge current is sensed via resistors R504 R506 507 and filter R509 C509 on pin 9 of the P ASIC IBATP The sense voltage is supplied to the control circuit The required charge current information is supplied by the D ASIC via the CHARCUR line and filter R534 C534 to pin 80 A control loop in the control circuit adjusts the actual charge current to the required value The filtered CHARCUR voltage range on pin 80 is 0 2 7V for a charge current from 0 5A to zero A voltage of 0V complies to 0 5A fast charge 1 5V to 0 2A top off charge 2 3V to 0 064 trickle charge and 2 7V to 0A no charge If the voltage is gt 3 Volt the charger converter is off V506 permanently non conductive The D ASIC derives the required charge current value from the battery voltage VBAT The P ASIC converts this voltage to an appropriate level and supplies it to output pin 78 BATVOLT The D ASIC measures this voltage via the Slow ADC The momentary value and the voltage change as a function of time dV dt are used as control parameters Charging process If the battery voltage drops below 5 2V and the battery temperature is between 10 and 45 C the ch
180. tion on the Digital part See Section 3 3 4 The TRIGLEV1 voltage is used for triggering on a negative slope of the Input 1 2 voltage The TRIGLEVZ2 voltage is used for triggering on a positive slope of the Input 1 2 voltage As the C ASIC inverts the Input 1 2 voltage the TRIGA TRIGB slopes on the T ASIC input are inverted From the selected trigger source signal and the used trigger level voltages the ALLTRIG and the DUALTRIG trigger signal are derived The select logic selects which one will be used by the synchronization delta T circuit to generate the final trigger There are three possibilities Circuit Descriptions 3 3 3 Detailed Circuit Descriptions 1 Single shot triggering The DUALTRIG signal is supplied to the synchronization delta T circuit The trigger levels TRIGLEV1 and TRIGLEV2 are set just above and below the DC level of the input signal A trigger is generated when the signal crosses the trigger levels A trigger will occur on both a positive or a negative glitch This mode ensures triggering when the polarity of an expected glitch is not known 2 Qualified triggering The ALLTRIG signal is supplied to T ASIC output pin 35 which is connected to the D ASIC input pin 21 The D ASIC derives a qualified trigger signal TRIGQUAL from ALLTRIG e g on each 10th ALLTRIG pulse a TRIGQUAL pulse is given The TRIGQUAL is supplied to the synchronize delta T circuit via the select logic 3 Normal triggering The ALLTRIG signal is s
181. tion statements where they apply will be found throughout the manual Where necessary the warning and caution statements and or symbols are marked on the instrument 1 3 Caution and Warning Statements Caution Used to indicate correct operating or maintenance procedures to prevent damage to or destruction of the equipment or other property Warning Calls attention to a potential danger that requires correct procedures or practices to prevent personal injury 1 4 Symbols Table 1 1 shows the symbols used on the test tool or in this manual Table 1 1 Symbols A Read the safety information in the Users D DOUBLE INSULATION Protection Class Manual Xy Equal potential inputs connected Static sensitive components internally black yellow 4 Live voltage A Recycling information lt 7 Disposal information C Conformit Europ enne 1 3 43 Service Manual 1 5 Impaired Safety Whenever it 1s likely that safety has been impaired the instrument must be turned off and disconnected from line power The matter should then be referred to qualified technicians Safety 1s likely to be impaired if for example the instrument fails to perform the intended measurements or shows visible damage 1 6 General Safety Information Warning Removing the instrument covers or removing parts except those to which access can be gained by hand is likely to expose live parts and accessible terminals which
182. triggering Current Source A current source in the T ASIC supplies a DC current to the GENOUT output pin 1 The current is used for resistance and capacitance measurements It is adjustable in decades between 50 nA and 500 uA depending on the measurement range and is derived from an external reference current This reference current is supplied by the REFP reference voltage via R323 and R324 to input REFOHMIN pin 6 The SENSE input signal is the buffered voltage on Input 1 For capacitance measurements it is supplied to a clamp circuit in the T ASIC pin 59 The clamp circuit limits the positive voltage on the unknown capacitance to 0 45 V The protection circuit prevents the T ASIC from being damaged by a voltage applied to Input 1 during resistance or capacitance measurements If a voltage is applied a current will flow via PTC resistor R172 on the Input 1 part V358 V359 V353 V354 to ground The resulting voltage across the diodes is approximately 2V or 15V R354 R356 and V356 V357 limit the voltage on the T ASIC GENOUT output pin 1 The BOOTSTRAP output signal on pin 3 is the buffered GENOUT signal on pin 1 or the buffered SENSE signal on pin 59 It is supplied to the protection diodes via R352 R353 and to protection transistor V356 to minimize leakage currents On the ICAL output of the T ASIC pin 5 a copy of the output current on GENOUT is available The current is supplied to the Input 1 C ASIC via 144 As ICAL shows
183. ts Harmonics Number DC 21 DC 33 DC 51 Readings Cursor readings Vrms fund 3 2 counts 31 5 3 counts 51 15 5 counts Irms fund 3 2 31 5 3 counts 51 15 5 counts Watt fund 5 10 counts 31 10 10 counts 51 30 5 counts Frequency of fundamental 0 25 Hz Phase deuote addat fund 23 51 15 K factor in Amp and Watt eren 10 Sags amp Swells Recording times selectable 4 minutes to 8 days endless 16 days Readings Cursor Readings Vrms actual Arms actual cycle by cycle calculation 2 10 counts Vrms max Arms max idem at cursor 2 12 counts Vrms average Arms average only at cursor 2 10 counts Vrms min Arms min idem at 2 96 12 counts Transients Detection of voltage transients n gt 40 ns Useful input bandwidth input 1 with test leads TL24 DC to 1 MHz Reference signals nte tor e rei Dir cde dn Na Vrms Hz After START the Vrms and frequency of the signal are measured From these data a pure sine wave 1s calculated Detection when transients exceed specified voltage level selectable
184. ts 8 5 Main PCA Parts Reference Description Ordering Code Designator 5322 116 40274 5322 117 12452 4822 051 20106 4822 051 20106 4822 051 20106 4822 051 20106 5322 117 12484 5322 117 12485 5322 117 12486 5322 117 12487 4822 051 51001 5322 117 13485 5322 117 13485 5322 117 13485 5322 117 13486 5322 117 12488 5322 117 12489 5322 117 12491 5322 117 13487 5322 117 12485 5322 117 12485 5322 117 12458 5322 117 12458 5322 117 12459 5322 117 12485 5322 117 12461 5322 117 12461 4822 117 11373 5322 117 12462 5322 117 12485 5322 117 12456 5322 117 12464 5322 117 12464 5322 117 12464 8 43 Service Manual Reference Description Ordering Code Designator R288 RESISTOR CHIP RC12H 1 10 5322 117 12464 R289 RESISTOR CHIP RC12H 1 10 5322 117 12464 R290 SMD RES 56K2 1 TC100 1206 5322 117 13488 R291 SMD RES 56K2 1 TC100 1206 5322 117 13488 R292 SMD RES 56K2 1 TC100 1206 5322 117 13488 R293 SMD RES 46K4 1 TC100 1206 5322 117 13489 R294 SMD RES 100K 1 TC50 0805 5322 117 13491 R295 SMD RES 215 1 50 0805 5322 117 13492 R296 SMD RES 1 1 50 0805 5322 117 13487 R297 SMD RES 10E 1 TC100 0805 5322 117 13493 R298 SMD RES 10 1 100 0805 5322 117 13493 R301 RESISTOR CHIP RC12H 1 3K16 5322 117 12465 R302 RESISTOR CHIP RC12H 1 10 4822 117 10833 R303 RESISTOR CHIP RC12H 1 10 4822 117 10833 R305 RESISTOR CHIP RC12H 1 10 4822 117 10833 R306 RESISTOR CHIP RC12G 1 21K5 5322 117 12492 R307 RESISTOR CHIP R
185. ty cycle to the PWM FILTERS circuit RC filters The outgoing APWM BUS Analog PWM provides analog signals of which the amplitude is controlled by the D ASIC These voltages are used to control e g the trace positions C ASIC the trigger levels T ASIC and the battery charge current P ASIC In random sampling mode Scope mode time base faster than 1 45 0 trace is built up from several acquisition cycles During each acquisition a number of trace samples are placed as pixels in the LCD The RANDOMIZE circuit takes care that the starting moment of each acquisition cycle trigger release signal HOLDOFF goes low is random 3 5 43 Service Manual This prevents that at each next acquisition the trace is sampled at the same time positions and that the displayed trace misses samples at some places on the LCD The D ASIC supplies control data and display data to the LCD module The LCD module 16 connected to the main board via connector X453 It consists of the LCD LCD drivers and a fluorescent back light lamp As the module is not repairable no detailed description and diagrams are provided The back light supply voltage is generated by the back light converter on the POWER part The keys of the keyboard are arranged in a matrix The D ASIC drives the rows and scans the matrix The contact pads on the keyboard foil are connected to the main board via connector X452 The ON OFF key is not included in the matrix but is sensed by a
186. upplied to the synchronization delta T circuit The ALLTRIG signal includes all triggers It is used by the D ASIC for signal analysis during AUTOSET Traditionally a small trigger gap is applied for each the trigger level In noisy signals this small gap triggering would lead to unstable displaying of the wave form if the noise 1s larger than the gap The result is that the system will trigger randomly This problem 1s solved by increasing the trigger gap TRIGLEVI TRIGLEV2 automatically to 8096 10 to 90 of the input signal peak to peak value This 80 gap is used in AUTOSET Note The ALLTRIG signal is also used for capacitance measurements S 3 3 2 The Synchronize Delta t part provides an output pulse TRIGDT The front edge of this pulse is the real trigger moment The pulse width is a measure for the time between the trigger moment and the moment of the first sample after the trigger This pulse width information is required in random repetitive sampling mode see below The HOLDOFF signal supplied by the D ASIC releases the trigger system The sample clock SMPCLK also provided by the D ASIC is used for synchronization Real time sampling TRIGDT signal For time base settings of 1 us d and slower the pixel distance on the LCD is 240 ns 1 division is 25 pixels As the maximum sample rate is 25 MHz a sample is taken each 40 ns So the first sample after a trigger can be assigned to the first pixel and successive samples to
187. ut 1 5 9 5 6 3 Gain DMM Gain Volt sse 5 10 64 Volt Zero ree 5 12 5 6 5 Gain Ohren Rr tate has 5 12 5 6 6 Capacitance Gain Low and High 5 13 5 6 7 Capacitance Clamp amp Zero sse 5 14 5 0 8 Capacitance iiie ear ed re dr eee te 5 14 5 7 Save Calibration Data and Exit 5 15 015455610 e UE 6 1 Contents continued 6 T Introduction aaa aut edet 6 3 6 2 Disassembling Procedures sse 6 3 6 1 TL Required er eet as Eee a 6 3 6 2 2 Removing the Battery Pack 360000006 0000004 6 3 6 2 3 Removing the Baill ananas eene 6 3 0 2 4 Opening the Test Tool niea ree me eite 6 3 6 2 5 Removing the Main 4 4 41 020040004040000000000000004 14 6 5 6 2 6 Removing the Display Assembly 1 7 6 6 6 2 7 Removing the Keypad and Keypad Foll 6 6 6 3 Disassembling the Main PCA Unit sese 6 6 6 4 Reassembling the Main PCA 2 241 2 2 2 2 4 00 002 000000400000000504 6 8 6 5 Reassembling the Test Tool essen 6 8 Corrective 444422222 121 7 1 FA Introd ctionz as 7 3 7 2 Starting Fault Finding u a u Sua uha ee
188. valid Save data and EXIT maintenance Note Calibration data valid indicates that the calibration adjustment procedure is performed correctly It does not indicate that the test tool meets the characteristics listed in Chapter 2 3 Press YES to save and exit Notes The calibration number and date will be updated only if the calibration data have been changed and the data are valid The calibration data will change when a calibration adjustment has been done The data will not change when just entering and then leaving the maintenance mode without doing a calibration adjustment The calibration number and date will NOT be updated if only the display contrast has been adjusted Possible error messages Invalid calibration data WARNING Calibration data NOT valid Save data and EXIT Proceed as follows e Toreturn to the Maintenance mode Press NO Now press until the display shows WarmingUp CL 0200 IDLE and calibrate the test tool starting at Section 5 5 5 15 43 Service Manual e To exit and save the INVALID calibration data Press YES The test tool will show the message The test tool needs calibration Please contact your service center at power on The calibration date and number will not be updated A complete recalibration must be done To exit and maintain the old calibration data Turn the test tool off No power adapter voltage WARNING No adapter present Calibration d

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