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Agilent Technologies 4284A User's Manual

1. First Edition part number 04284 90100 July ated Y e de Et d Second Edition part number 04284 90100 Safety Summary The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific WARNINGS elsewhere in this manual may impair the protection provided by the equipment In addition it violates safety standards of design manufacture and intended use of the instrument The Agilent Technologies assumes no liability for the customer s failure to comply with these requirements Ground The Instrument To avoid electric shock hazard the instrument chassis and cabinet must be connected to a safety earth ground by the supplied power cable with earth blade DO NOT Operate In An Explosive Atmosphere Do not operate the instrument in the presence of flammable gasses or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard Keep Away From Live Circuits Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified maintenance personnel Do not replace components with the power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power and discharge circuits bef
2. qa Qu nc 3 j teno nc ne 5 4 5V EXT DCV1 COM 5 5V 5 51 EXT DCV1_COM 45V 5V 6 5V EXT DCVt_COM 45V 12V 7 12 EXT DCV2 COM EXT DCV2 LGND 8 LGND EXT DCV2 COM EXT DCV2 nc 9 nc EON JEXT_TRIG ne ne INDEX EXY TRIG ALARM AUX BIN nc nc EXT DCV1 OUT OF BINS nc nc MI 9 81N9 1 one ne BIN nc nc menok 5 WANDLER A1 UKABL 6 81N6 LGND LGND ne 5 JB1N5 D14 p15 nc 5 BIN4 012 013 SREJ 3 81N3 010 211 PLO 2 BIN2 08 09 PHL 4 B1N1 4 02 03 00 01 LGND POM_FAIL VPA RESET E LGND 105 WDL TRG INT LGHO KEY LOCK INT nc O M G 2 e e 1 A30 Handler Interface Component Locations 4 A30 4 Figure 4 A30 XIR XIA x18 XIb 27 28 25 25 24 24 23 3 22 22 2 29 26 18 OQ in ow 5 gt Ob OM o 335 32 HANDLER INTERFACE 201 RESET JKEY LOCK 1 D1 02 03 D 55 b 7 HANDLER ADS 5 R V At A2 806 3 s 5 INT 9 412 E LUI 16 BALARM 15 BINOEX 08 SV 5v 51 G 9 010 011 012 013 LAN 015 R23 4 6 119 4 8ALARM 5 F1 5 9 C cs c c 416 t
3. 1 m Ds dn GA E M ue E A pC NT 732 sj Ee E sj 9 I GRE ne 29 Hu E MERECE n B REE k i 401 l 1000 1 Ft T Figure 4 A31 2 A31 Handler Interface Schematic Diagram BIN3 BINS BINIG R112 EOC Aaa vx PH Y 2 m M 5 222 2 tum m t TN E d 2 m x Ex in ds E e amp _ e a 2 HA JIA u h e is ia 4 JIA a JIA 1 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS uF 2 UNLESS OTHERWISE INDICATED i INDUCTANCE IN MICROHENRIES 4 A31 5 4 21 A40 SCANNER INTERFACE OPT 301 SERVICE SHEET 4 21 1 CIRCUIT DESCRIPTION The A40 scanner interface board consists of photo couplers EEPROMs Static RAMs and peripheral interface adapter
4. 9 219 6 START SYSTEM GROUND 235 5 QUT BIN9 8188 nc BIN7 5 81N6 n 81N5 5 ne BING C ollu O 8I1N3 81N2 81N1 81N0 COMMON Q 60nr9 Q 801u O LOYO 0 0 UOS 4 I UE o0000000000000000000 BooomoooogmooooBHoooou hz us fs s v v v Q s01u 9 E RESET LGND R M Q 0nro LOS 5 WDL TRG INT nc Q 0nr9 CGND nc 9 20 90 Q i01u O bo gt O gt C e e Q Q i 5 i 1 Booooooooo R16 Figure 4 A31 1 A31 Handler Interface Component Locations 4 A31 4 XIB XIB XIA XIB XIA x18 X1B X1B X1B XIA X1B XIB X1B XIA X18 X18 1 X18 XIA X18 X18 XIA XIB XIA X18 BR s M 3 eve ee 71 CE E Oe M et 6 tU t MgyBaSnuececuunmn2 P i M ST EE ES m e de s a p ei G ES m m s TUE MR Ua 6 dr din P e d m gt 388783 196 X 11 e E 2 U24 2 5 amp 1 145 1 Ut K EN 3 18 m Dr 1 BEREE m 447
5. RESISTOR 2 15K 1 125W F TC 0 100 RESISTOR 10K 1 125W TC 0 100 RESISTOR 2 15K 1 125W F TC 0 100 RESISTOR 4 64K 1 125W 0 100 RESISTOR 4 64K 1 125W F TC 0 100 0698 0084 0757 0442 0698 0084 0698 5155 0698 3155 OO 0 RESISTOR 2 15K 1 125W F TC 0 100 RESISTOR 4 64K 1 125W F TC 0 100 RESISTOR 51 1 1 125W 0 100 RESISTOR 2 15 1 125W TC 0 100 RESISTOR 1K 1 125W F TC 0 100 0698 0084 0698 3155 0757 0394 0698 0084 0757 0280 CT4 1 8 T0 2151 F CT4 1 8 T0 4641 CT4 1 8 T0 51R1 F CT4 1 8 T0 2151 F CT4 1 8 T0 1001 F INO CT4 1 8 70 2151 F 4 1 8 10 1001 CT4 1 8 TO 1002 F 0698 4057 0698 4057 RESISTOR 2 15K 1 125W 0 100 RESISTOR 1K 1 125W TC 0 100 RESISTOR 10K 1 125 TC 0 100 RESISTOR 46 4 1 125W 0 100 RESISTOR 46 4 1 125W F 0 100 0698 0084 0757 0280 0757 044 0698 4057 0698 4057 O0 OU RESISTOR 464K 1 125W F 0 100 RESISTOR 464 1 125W 0 100 RESISTOR 680 5 2W MO 0 200 RESISTOR 4 64K 1 125W 0 100 RESISTOR 100K 1 125M TC 0 100 0698 5260 0698 5260 0698 5655 0698 5155 0757 0465 0698 5260 0698 5260 0698 5655 CT4 1 8 TO 4641 F CT4 1 8 T0 1003 F OHM O00
6. 0757 0397 0698 3454 0698 0084 0757 0280 0757 0280 RESISTOR 68 1 1 125W 0 100 RESISTOR 215K 1 125W F TC 0 100 RESISTOR 2 15K 1 125W F TC 0 100 RESISTOR 1K 1 125W F TC 0 100 RESISTOR 1K 1 125W F 0 100 CT4 1 8 TO 68R1 F CT4 1 8 TO 2153 F CT4 1 8 T0 2151 F CT4 1 8 T0 1001 F CT4 1 8 T0 1001 F CN LA SO CN OW 0698 5155 0698 5260 0698 5155 0698 0082 0757 0401 RESISTOR 4 64 1 125W 0 100 RESISTOR 464K 1 125W TC 0 100 RESISTOR 4 64K 1 125W 0 100 RESISTOR 464 1 125W 0 100 RESISTOR 100 1 125W F TC 0 100 CT4 1 8 T0 4641 F 0698 3260 CT4 1 8 T0 4641 F CT4 1 8 T0 4640 F CT4 1 8 TO 101 F ON 0757 0419 2100 3350 0698 3438 0698 0082 0757 0465 RESISTOR 681 1 125W F TC 0 100 RESISTOR TRMR 200 10 C SIDE ADJ 1 TRN F F CT4 1 8 T0 681R F 2100 5550 CT4 1 8 TO 147R F CT4 1 8 T0 4640 F CT4 1 8 TO 1005 F RESISTOR 147 1 125 0 100 RESISTOR 464 1 125W 0 100 RESISTOR 100K 1 125W TC 0 100 AN WU O CT4 1 8 TO 2151 F CT4 1 8 T0 2151 F 0698 5628 0698 5628 RESISTOR 2 15K 1 125M F 0 100 RESISTOR 2 15K 1 125W 0 109 RESISTOR 220 5 2W MO 0 200 RESISTOR 220 5 2W MO TC 0 200 0698 0084 0698 0084 0698 5628 0698 5628 IN WO O 0698 3435 0757 0274 0757 0
7. 2 2 NULL OFS ADJ X30 GND oss Q g id A2 BOARD UDINE Figure 2 15 Null Amplifier DC Offset Adjustment Location 4 Perform the zero offset adjustment according to the program instruction Figure 2 16 shows the A2R224 0 DEG and A2R324 90 DEG locations NOTE The Top Shield Plate upon A2 through A7 board must be replaced when perform ing the zero offset adjustment A2R224 A2R324 0 DEG 90 DEG A2R224 0 DEG A2R324 90 DEG A2 BOARD Figure 2 16 Zero Offset Adjustment Location NO gt c 7 emt D 2 7 NOTE If R224 and R324 cannot be adjusted change W201 W202 W203 W301 W302 and W303 jumper settings and try again W201 W202 and W203 are related to R224 W301 W302 and W303 are related to R324 Figure 2 17 shows the rela tion between the jumper settings and the adjustable range After changing the jumper settings press the Retry softkey to reset the HP 4284A s adjustment conditions JUMPER SETTING DECRE ASE GREADING INCREASE wo 99 rew Y R224 SETTING W203 DOE FCcCW R224 SETTING W201 o XR c 202 e RES R224 SETTING FCW W203 e DE JUMPER SETTING INCREASE B READING DECREASE W30 BA w302 9 Y rew R324 SETTING W303 wo
8. o zz 3 y onm TO Booooooooooooo Go o60000000000000 00000000000000 D 2 2 00000000000000 E Oi o00000000000000 9009000009000000 n 3 o 555220529602 od 8 2 0 o ch t Cis 70 CJ C Figure 4 A7 1 A7 Digital Control Component Locations 4 A7 4 4 15 A9 A13 A90 AND A91 BOARDS SERVICE SHEET 4 15 1 CIRCUIT DESCRIPTION The A9 keyboard consists of Key switches LED indicators a buzzer and the LCD contrast potentiometer The A13 DC AC Converter Board converts 12 V DC into 600 V AC to sup ply the 600 V AC to the A91 LCD Module board to backlight the LCD The A90 Keyboard Display Contro Module board interfaces the A7 CPU board to both the A9 Keyboard and the A91 LCD module board The A91 LCD module is the HP 4284A s display screen 4 15 2 TROUBLESHOOTING AIDS Fuse A9F1 for the A90 board and is located on the A9 Keyboard If the HP 4284A display screen isn t active check fuse A9F1 first The A90 and A91 board assemblies aren t repaired at the component level because the components on each board are surface mounted and they are difficult to be replace Thus A90 or A91 are faulty repair them at the assembly level only 4 15 3 REPLACEABLE PARTS LISTS The replaceable parts for the A9 Keyboard are listed in Table 4 A9 A13 A90 A91 1 The replaceable parts for the A13 DC AC Converte
9. 3 22 3 9 2 DIGITAL CONTROL BLOCK SECTION The digital control functional group consists of the following boards A7 A9 A10 A20 A30 A31 A40 50 Digital Control CPU Keyboard Memory Card Interface HP IB Interface Handler Interface Option 201 Handler interface Option 202 Scanner Interface Option 301 Bias Current Interface Option 002 The simplified block diagram is shown below TEST ROM CHECK SUM TEST MEASLREMENT EEPROM CHECK SUM TEST SECT ION SUO 1 CULO U LCD TEST 2 gt gt 2 C lt lt KEYBOARD TEST LED TEST MEMORY CARD TEST CONNECTOR HANDLER I F 1 CONNECTOR HADLER INTERFACE KK j OPTION 201 202 HANDLER WF TEST o SCANNER I F que SI SCANNER I F EEPROM R W TEST SCANNER INTERFACE OPTION 301 SCANNER VO TEST o o CURREN MN CONNECTOR BIAS CURRENT IF fF BIAS CURRENT VF VO TEST OPTION 002 o gen Figure 3 4 Digital Control Block Diagram 3 23 Each board is described below Digital Control CPU The A7 Digital Control CPU contains the main CPU 16 bit micro processor programmed ROMs RAMs EEPROMs and the local clock generator This A7 board is the master con troller for the HP 4284A A9 Keyboard The A9 keyboard is the front panel keyboard LED indicators beeper and the CONTRAST adjustment resistor are on the A9 board A10 Memory C
10. t REFERENCE DESIGNATORS misc electronic part P fuse Q filter R Jack RT relay S inductor T meter TB mechanical part TP ABBREVIATIONS henries NPN hexagonal mercury hour s hertz intermediate freq impregnated incandescent include s insulation ed internal kilo 1000 left hand linear taper lock vasher logarithmic taper low pass filter milli 10 meg 106 metal film metallic oxide manufacturer miniature momentary mounting mylar nano 10 normally closed neon nickel plate normally open negative positive zero zero temperature coefficient plug transistor resistor thermistor switch transformer terminal board test point noire ou negative positive negative not recommended for field replacement not separately replaceable order by description oval head oxide peak printed circuit pico 107 phosphor bronze Phillips peak inverse voltage positive negative positive part of polystyrene porcelain position s potentiometer peak to peak point peak working voltage Hou gd rectifier radio frequency round head or right hand rack mount only root mean square lt c 5 SCR SE 51 SIL SL SPG SST SR STL p VAR VDCW w w integrated circuit vacuum tube neon bulb photocell etc voltage regulator cable socket crystal reverse
11. 325 302 J Fo R324 SETTING W303 W301 e 55 302 R324 SETTING Fw J Few 303 W301 e EX 302 R324 SETTING FCCW Few Figure 2 17 Jumper Settings VS Adjustable Range 2 21 5 Perform the impedance measurement adjustment EEPROM data updating according to the program instruction Figure 2 18 shows the adjustment setup HP 4284A Test Leads Standard Standard Figure 2 18 Impedance Measurement Adjustment Setup 2 22 SECTION 3 ASSEMBLY SERVICE INFORMATION 3 1 INTRODUCTION This section provides assembly service information for the HP 4284A PRECISION LCR METER 20 Hz to 1 MHz assemblies 3 2 SAFETY CONSIDERATIONS This section contains WARNINGS and CAUTIONS that must be followed for your protection and to avoid damaging the equipment THE MAINTENANCE PROCEDURES DESCRIBED HEREIN ARE PERFORMED WHEN POWER IS SUPPLIED TO THE INSTRUMENT AND ITS PROTECTIVE COV ERS ARE REMOVED THIS TYPE OF MAINTENANCE MUST BE PERFORMED ONLY BY SERVICE TRAINED PERSONNEL WHO ARE AWARE OF THE HAZARDS INVOLVED FOR EXAMPLE FIRE AND ELECTRICAL SHOCK WHEN MAIN TENANCE CAN BE PERFORMED WITHOUT POWER APPLIED TO THE INSTRU MENT REMOVE POWER FROM THE INSTRUMENT BEFORE ANY REPAIR IS COMPLETED ENSURE THAT ALL SAFETY FEATURES ARE INTACT AND FUNCTIONING AND THAT ALL NECESSARY PARTS ARE PROPERLY CONNECT ED TO THE PROTECTIVE
12. 2 X182 X1B3 X1B 26 X18 31 _ 32 X1A 29 Su 26 31 32 L5164 251688 DIO B 1 5 ET US zi T L 815541 4 64 K 1 kdo a te pu vp 16M CTRL 8 DT 8 7 5 45V 3 2 e e e e R2 2511 C8 C7 C6 C5 C4 C3 C2 Ci 0 1 0 1 0 1 0 1 0 1 0 1 0 1 T 470 j Na 051 gt Figure 4 A20 2 A20 HP IB Interface Schematic Diagram DBUS B 1 CBUS B 1 01011 HAT 210295 2 11032 3 0104 MA 4 4 DIOS 1 H8 1 s 01062 182 01073 JB 3 DI08 NB 4 DAV amp HAG s NDAC D 4 NRFD 7 J1A7 2 0 S JIAS e SRO 16 3 10 REN 5 J185 IFC 8 AS TN J1A 12 W1 i NOTES l REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS 9 CAPACITANCE IN MICROFARADS pF INDUCTANCE IN MICROHENRIES 4 A20 5 4 19 A30 HANDLER INTERFACE 201 SERVICE SHEET 4 19 1 CIRCUIT DESCRIPTION The A30 handler interface board consists of photo couplers and the peripheral interface adapters Photo Couplers Photo couplers A30U1 through A30U7 opto isolate the input and output signals Jumpers A30W1 through A30W11 are set according to the pull up voltages used
13. The vector ratio detector is the board and it consists of the phase sensitive detector the detection phase generator and the A D Analog to digital converter The phase sensitive detector detects the ERR voltage and the EDUT voltage using 0 90 reference signals from the detection phase generator and outputs the 0 components of the ERR and EDUT voltages and the 90 components of the ERR and EDUT voltages The converter coverts each 0 and 90 components to digital signals After that each parameter s value is calculated by using these digital values MUETISSEOPE 1 0 CONVERTER DETECTION PHASE GENERATOR Figure 3 10 Vector Ratio Detector 3 30 ANALOG SECTION BLOCK DIAGRAM STD A5 SIGNAL SOURCE AS RANGE RESISTOR A6 VECTOR RATIO DETECTOR u dicts Eum AC Level C TPUT A Channel 19 2MH7 rove gy fiter A Level contra Multiplexer Process Phose Sensitive Detector gt PSOE MM JENS UNS AT x Vch SENSE AMP ORE Heur EDUT 15 d gt lt 55 2 310 Ss e 3 i OSC achive 9 i room 5 G OFF UST Reference F SF VY From 45 A2 MODULATOR OSC LEVEL OSC LEVEL Normalizer2 7 Hy V MODEM AD CLK 89 OF SODEG ODEG amama TAN TO 2
14. UNBAL HOT USE EXT DCV1 COM EXT DCY2 ALARM ZINDEX EXT 0CY2 CO KEYLOCK EXT TAIG 218 218 m o 9 414 2 1 mee 3 214 rm 4 g g 7 JIA a g Ww 1 JiB 2 J8 3 418 5 Ju 218 a 2 EI 4 4 jg 15 41 jon PEL 13 216 4 21 5 41 7 38 13 4 A30 5 4 20 A31 HANDLER INTERFACE OPT 202 SERVICE SHEET 4 20 1 CIRCUIT DESCRIPTION The A81 handler interface board consists of photo couplers and peripheral interface adapt ers PIAs Photo Couplers Photo couplers A31U1 through 1014 opto isolate the input and output signals Then timing of the input output signals is determined by setting jumpers A31W3 through A31W13 For more detail information about the input output signals and the jumpers refer to the handler interface operation note in the HP 4278A Operation Manual Peripheral Interface Adapters Peripheral interface adapters 5 A31U19 and A31U20 interface between the A7 CPU board and the A31 board 4 20 2 TROUBLESHOOTING AIDS The test points are listed in Table 4 A31 1 Test Point Table 4 A31 1 Test Point List A31TP1 Ground line A31TP2 5 V DC A31TP3 792 kHz Clock signal 1 START signal 4
15. ROMs Ver 1 11 set ROM 20K BITO ROM 20K BIT8 707 7020 gt New C Change D Delete A Add Agilent 4284A PRECISION LCR Meter Including Option 001 006 201 202 301 Service Manual SERIAL NUMBERS This manual applies directly to instruments whose serial number prefix is 2826J 2832J 2848J and whose ROM based firmware version 01 10 For additional important information about serial numbers read SECTION 1 SERIAL NUMBER of this Service Manual Agilent Technologies Agilent Part No 04284 90100 Printed in JAPAN July 2000 Notice The information contained in this document is subject to change without notice This document contains proprietary information that is protected by copyright rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of the Agilent Technologies Agilent Technologies Japan Ltd Component Test PGU Kobe 1 3 2 Murotani Nishi ku Kobe shi Hyogo 651 2241 Japan Copyright Agilent Technologies Japan Ltd 1989 2000 Manual Printing History The manual printing date and part number indicate its current edition The printing date changes when a new edition is printed Minor corrections and updates that are incorporated at reprint do not cause the date to change The manual part number changes when extensive technical changes are incorporated January 1989
16. 2 10 2 17 2 19 TABLE OF CONTENTS SECTION 3 ASSEMBLY SERVICE INFORMATIONS 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 INTRODUCTION SAFETY CONSIDERATIONS RECOMMENDED TEST EQUIPMENT AFTER SERVICE PRODUCT SAFETY CHECKS ASSEMBLY DESIGNATIONS AND LOCATIONS REPLACEABLE MECHANICAL PARTS LIST TOOLS AND FASTENERS DISASSEMBLY 3 8 1 Top Cover Removal 3 8 2 A1 Assembly Removal 3 8 3 Removing the A2 A4 A5 A6 A7 20 A30 A31 A40 A50 assemblies 3 8 4 Front Panel Disassembly 3 8 5 A9 or A90 Assembly Removal 3 8 6 A10 Assembly Removal 3 8 7 A13 Assembly Removal 3 8 8 A91 LCD module Assembly Removal THEORY OF OPERATION 3 9 1 Power Supply Block Section 3 9 2 Digital Control Block Section 3 9 3 Source Block Section 3 9 4 Transducer Block Section 3 9 5 3 10 1 3 10 2 3 10 3 Vector Ratio detector Section FAULTY BOARD ISOLATION Self Test Faulty Board Isolation Program Faulty Board Isolation Procedure 3 1 3 1 3 1 3 1 3 21 3 21 3 23 3 25 3 27 3 30 3 35 3 35 3 38 3 40 TABLE OF CONTENTS SECTION 4 SERVICE SHEETS 4 1 4 2 4 3 4 4 4 5 4 19 4 20 4 21 APPENDIX A A 1 INTRODUCITON CIRCUIT DESCRIPTION TROUBLESHOOTING AIDS BOARD CONNECTOR PIN ASSIGNMENT REPLACEABLE PARTS LIST 4 5 1 4 5 2 4 5 3 4 5 4 Abbreviations Heplaceable Parts Lists Ordering Information Direct Mailing O
17. NOTE Do not remove the Adjustment Program Disk from the computer while the adjustment program is running 9 Press the computer s RUN key then copyright and other information are dis played Press the Next Step softkey to continue the program NOTE When the computer cannot access the HP 4284A the HP IB address registration display appears Enter the HP 4284A s HP IB address using the numeric keys and the Enter softkey m C Lt C nt T E 2 10 After the copyright and other information are displayed the Main Menu will be displayed In the main menu you can select the necessary adjustments using the softkeys NOTE When you perform the adjustments refer to paragraph 2 10 DC Bias Level Adjustment 2 11 Test Signal Level Level Monitor Adjustment and 2 12 Impedance Measurement Adjustment 2 7 3 CLOSING PROCEDURE This paragraph gives the procedure to finish the adjustment program When the adjustment program is finished HP 4284A s calibration data must be write protected i The Main Menu is displayed on the controller s screen Press the Exit softkey to finish the calibration program Then the write protect display will appear 2 Turn the HP 4284A OFF 3 Replace the HP 4284A s EEPROM write protect jumper A7W2 to its Normal position N 4 Replace the shield plate and the top cover 9 Turn the HP 4284A ON 6 Press the Ready softkey to examine the write protection and f
18. OPTION 301 SCANNER INTERFACE Enable Storing J Disable Storing Enable Correction Data Change Disable Correction Data Change OFF gt Bit Switch Selected Description HANDLER INTERFACE Self Test Standard Position EN gt 0 9 lt a C HP IB Not installed Installed Bias Current I F Not installed Installed Handler Opt 202 installed Opt 201 installed or not installed Opt 201 installed or not installed Not installed Enable storing Enable changing Normal position Handler 1 F Opt 202 installed Installed Disable storing _ Disable changing Self test position refer to SECTION 3 scanner I F Storing Correction data change Self test The description for the bit 6 and 7 is discussed in Appendix G of the HP 4284A Opera tion Manual 4 A7 1 4 14 2 TROUBLESHOOTING AIDS since the A7 board has been set up under the exchange program when the A7 board is defective you replace the A7 board The board isolation procedure is given in SECTION 3 4 14 3 REPLACEABLE PARTS LIST The replaceable parts for the A7 board are divided into two groups a ROMIess A7 board and a set of programmed ROMs This protects against the mismatching of ROM versions be tween the replaced CPU board and the defective CPU board Only the ROMless A7 board has been set up under the exchange assembly program If the A7 board is
19. Scanner 1 O test Bias current F I O test NOOR N 3 Self test selected by the bit switch The following self tests can be performed by setting the A7S3 bit switch Table 3 12 Bit Switch Selected Self Test This self test displays the ROM check sum on the LCD display This self test performs the RAM read write test This self test performs the EEPROM read write test The time required for completing this test is approximately 17 minutes This self test perform the front panel keyboard test Pressed key code and its abbreviated name will be displayed This self test initializes the EEPROM This self test must be performed when the EEPROM is being replaced This self test initializes the scanner interface s EEPROM This self test must be performed when the scanner interface s EEPROM is being replaced 3 37 22 h 5 tA 321 18 Aj quiassy NOTE Each bit of the A7S3 usually uses the digital interface selection So after perform ing the bit switch selected self test the 753 switch must be set properly For more details refer to the A7 board service sheet SECTION 4 3 10 2 FAULTY BOARD ISOLATION PROGRAM To isolate a faulty board the service program must be used This program isolates the faulty board in a dialoge style between the user and the controller The program disc for performing the faulty board isolation is supplied as follows 5 25 inche
20. y cOOoGOOQOQOcO0 00000000000000000006 5990 509999590000000000000000090 NOOONOOO0900008000080000800900800 NOOONOCOOOGMNCOOCOBOOOONOCOOOBOOOOROO Bow gt D lt O D D e 0 59990 I 922 gt lt TT Figure 4 A11 1 A11 Motherboard Component Locations 4 A11 3 X6 X5 X4 X15 X14 X13 X12 X18 17 J5 Figure 4 A11 1 Pin Assginment on the A11 Circuit Side 4 A11 4 PIN ASSIGNMENTS ON THE A11 CIRCUIT SIDE m gt m 4 e 5 MEM CARD 5V MEM CARD A19 A20 HANDLER INT TO STD IF 17 A18 LGND LGND 15 A16 3 AT i x DB 09 08 09 06 97 2 07 A 04 05 D4 DS D2 03 02 D3 DO 01 00 01 LGND POw_FAIL LGND LGND VPA DTACK LGND RESET E RESET HALT ES 0 STD jane pa EXT RESERVE STD 1 4 1 KEY LOCK INT TRG INT LGND 1NT FROM STD IF 912 a 7CLK16MH2 LGND CLK 16MK2 LGND 516 dm 08 09 06 27 04 05 02 05 DO 01 FANCTL nc POWFAIL nc nc nc nc nc RESET R W 005 105 AGND AGND AGND nc CARD R W CARD 105 AGND AGND AGNO ne KBD_INT REAR_TRG_INT 0C INT EOC_INT EOC INT i ne EOC_1F
21. 64 CONT 64 CONT 2 CONT 54 CONT 4 A11 2 04284 66511 1251 4938 1251 5066 1251 7406 7854 0000 7854 0000 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 1251 4938 1251 5066 7834 00007 04278 61624 04278 61629 Jooo309992909999020990020909900909 99939900990009090090990900090009060 1 NOOOBOOcONOOOO NOO OONOOGONOOOONCO Ly GGooGooooo 000000000000000000006 o NOOcONOOOCONCODOBOOSOBOCO OBOOOCONO oomoooo 0000900 0090000000000000 goo o0000000000000000000000000000000 FASE ETS TEE eT ooo e x 0008000080000500008000080000800 NOOOOBOOOONOOOONO oo o oo 900900000 o060000000 90000000000 pace C ocogoocogoooogooooNHcoocOoBOoO
22. 9N171 9N171 9N171 28480 28480 28480 184150 1 4150 144150 144150 184150 1902 3150 144150 144150 1902 0943 1902 0945 1N4150 1N4150 1N4150 1N4150 1N4150 1N4150 1N4150 1N4150 1902 5150 1902 0955 1906 0317 1906 0316 1906 0317 1906 0316 1906 0316 1N4150 1N4150 1N4150 1N4150 1N4004G 1N4004G 1N4004G 1N4004G 1906 0314 1902 0964 1902 3188 1N4150 1902 0957 1902 0951 1902 3188 184150 1902 0964 144150 144150 184150 1 840046 144150 144150 144150 144150 HLMP 1301 HLMP 1301 0837 0337 Table 4 6 A1 Power Supply Replaceable Parts List 3 5 Reference HP Part Mfr 2110 0014 FUSE 4A 250V TD 1 25X 25 UL 513004 2110 0746 FUSE 7 125V NTD UL 2110 0746 2110 0746 FUSE 4A 125V NTD UL 2110 0746 2110 0743 FUSE 2A 125V UL 2110 0741 2110 0743 FUSE 2A 125V UL 2110 0741 2110 0743 FUSE 2A 125V UL 2110 0743 2110 0743 FUSE 2A 125V UL 2110 0743 2110 0743 FUSE 125V 2110 0743 2110 0665 FUSE THERMAL 96 DEG C 2110 0663 1251 3819 CONN UTIL MT LK 6 6 CONT 1251 3819 0490 1312 09 0490 1312 RELAY IC 5VDC COIL 10A 240VAC 9100 3139 2 INDUCTOR 75UH 15 5D INX 875LG IN 9100 5139 9100 5139 gt INDUCTOR 75UH 15 5D INX 875LG IN 9100 5139 9140 1136 2 INDUCTOR 27MH 35 61W INX 728LG IN 9140 1156 9140 1135 1 INDUCTOR 76UH 15 1 215W INX1 161LG IN 9140
23. A9F1 2110 0741 5 1 FUSE 1A 125V NTD UL 2110 0741 A9J1 1251 4959 0 1 CONNECTOR 2 PIN POST 1251 4959 A9R1 0698 3155 1 2 RESISTOR 4 64 1 1254 TC 0 100 CT4 1 8 T0 4641 F A9R 2 0757 0465 6 1 RESISTOR 100 1 125W 0 100 4 1 8 170 1003 A9R3 0698 3155 1 RESISTOR 4 64K 1 125W 0 100 CT4 1 8 T0 4641 F 9 4 0698 0082 7 4 RESISTOR 464 1 125W TC 0 100 CT4 1 8 T0 4640 F A9R5 0698 0082 7 RESISTOR 464 1 125W 0 100 CT4 1 8 T0 4640 F A9R6 0698 0082 7 RESISTOR 464 1 125M 0 100 CT4 1 8 T0 4640 F AOR 0698 0082 7 RESISTOR 464 1 125W F 0 100 CT4 1 8 1T0 4640 F AOR8 2100 4174 3 1 RESISTOR VAR CONTROL CF 20K 10 LIN 2100 4174 A9R9 0698 5440 7 1 RESISTOR 196 1 125W F 0 100 CT4 1 8 TO 196R F A9SP10 9164 0295 2 1 ALARM AUDIBLE 9164 0295 A9U1 1820 1425 4 1 MV TTL LS MONOSTBL RETRIG DUAL SN74LS125N A9W1 8120 4904 5 1 FLEX JUMPER WIRE 8120 4904 A9W2 8120 4910 3 1 FLEX JUMPER WIRE 8120 4910 4 A9 A13 A90 A91 2 Table 4 A9 A13 A90 A91 2 A13 DC AC Converter Replaceable Parts List Reference HP Part A13 A13 04278 66513 6 13 1 0180 3602 6 13051 2140 0127 2 13 1 04278 61101 8 1341 1251 4938 5 132 1251 4938 5 A1311 9140 1278 3 A13R1 0689 1055 7 A13R2 0689 1055 7 A13R3 0698 3454 3 A13R4 5 0698 5455 DC AC CONVERTER 04278 66513 CAPACITOR FXD 22UF 20 SOVDC
24. For more detail information about the input output signals and jumpers refer to the handler interface opera tion note in the HP 4284A operation manual Peripheral Interface Adapters A30U13 and A30U14 are peripheral interface adapters PIAs which interface between the A7 CPU board and the A30 board 4 19 2 TROUBLESHOOTING AIDS The test points are listed in Table 4 A30 1 Table 4 A30 1 Test Point List 1 4 Ground line 2 5V DC A3OTP3 792 kHz Clock signal EXT TRIG signal 4 19 3 REPLACEABLE PARTS LISTS The replaceable parts of the A30 handler interface board are listed in Table 4 A30 2 4 19 4 COMPONENT LOCATIONS The component locations of the A30 handler interface board and the board connector assignments are shown Figure 4 A30 1 4 19 5 SCHEMATIC DIAGRAMS The schematic diagram of the A30 handler interface board is shown in Figure 4 A30 2 4 A30 1 A ve D um lt O em d Table 3 1 A30 Handler Interface Replaceable Parts List Reference HP Part me Mfr 04278 66530 HANDLER IF OPTION 201 04278 66530 CAPACITOR FXD 22UF 20 50VDC AL 0180 5602 0180 5602 0180 3563 CAPACITOR FXD 22UF 20 25VDC CER 0180 3363 0160 4832 CAPACITOR FXD O1UF 10 100VDC CER 0160 4832 0160 6561 CAPACITOR FXD 0 1 20 50VDC CER CACO225U104M050A 0160 6561 CAPACITOR FXD O 1UF 4 207 50VDC
25. PIA Photo Couplers When the scanner interface connector on the rear panel is used to synchronize an external scanner the input output signals are opto isolated by opto couplers 4003 A40U4 4005 and 4006 The pull up resistors for the input signals are selected using jumpers A40SW1 and A40SW2 EEPROMs 1 EEPROMs 4007 and A40U12 64 KBytes are used to store compensation data for 128 channels Peripheral Interface Adapter Peripheral interface adapter A40U9 interfaces between the A7 CPU board and the 40 board 4 21 2 TROUBLESHOOTING AIDS The test points are listed in Table 4 40 1 Table 4 40 1 Test Points A40TP1 EXT TRIG External trigger signal A40TP2 EXT DCV External DC voltage A40TP3 COMMON Common line AAOTPA VCC 5 V DC 40 5 GND Ground line 4 40 1 BN CD D Em lt O 5 2 D C 4 21 3 REPLACEABLE PARTS LISTS The replaceable parts for the A40 Scanner Interface Board are listed in Table 4 A40 2 4 21 4 COMPONENT LOCATIONS The component locations on the A40 scanner interface board and the board connector pin assignments are shown in Figure 4 A40 1 4 21 5 SCHEMATIC DIAGRAMS The schematic diagram of the A40 Scanner Interface board is shown in Figure 4 A40 2 4 A40 2 Reference HP Part 52 25 04278 66540 R16 R21 R25 R26 Table 4 A40 2 A40 Scanner Interface Replaceable Parts list 1 2 0180 3363 0160 6
26. 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W TC 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W 0 100 C4 1 8 T0 215R F 0698 3441 8 RESISTOR 215 1 125W F TC 0 100 C4 1 8 T0 215R F 0698 3441 8 RESISTOR 215 1 125W 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W 0 100 C4 1 8 T0 215R F 0698 0082 7 RESISTOR 414 1 125W TC 0 100 C4 1 8 T0 4640 F 0698 0082 RESISTOR 414 1 1250 0 100 1 8 0 4640 0698 0082 7 RESISTOR 414 1 125M 0 100 4 1 8 70 4640 0757 0420 5 RESISTOR 750 1 125W TC 0 100 4 1 8 10 751 0698 5444 1 RESISTOR 316 1 125W TC 0 100 4 1 8 10 516 0757 0416 f RESISTOR 511 1 125W TC 0 100 CT4 1 8 T0 511R F 0698 6562 8 RESISTOR 1K 1 125W TC 0 25 0698 6362 1810 0279 gt NETWORK RES 10 SIP 4 7K OHM X 9 CSC10A01 472G MSP 0757 0420 2 RESISTOR 10 1 125W TC 0 100 0757 0346 0698 3155 1 RESISTOR 4 64K 1 125W TC 0 100 CT4 1 8 TO 4641 F 1990 1179 0 PHOTO COUPLER 1990 1179 1990 1179 0 PHOTO COUPLER 1990 1179 1990 1179 0 PHOTO COUPLER 1990 1179 1990 1179 0 PHOTO COUPLER 1990 1179 1990 1180 0 PHOTO COUPLER 1990 1180 1990 1179 6 PHOTO COUPLER 1990 1179 1990 0602 8 OPT
27. 1135 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1853 0459 3 TRANSISTOR PNP SI PD 625MW FT 200MHZ 1853 0459 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW FTz200MHZ 1854 0810 1853 0459 5 TRANSISTOR PNP SI PD 625MW FT 200MHZ 1853 0459 1855 0658 8 TRANSISTOR MOSFET N CHAN E MODE SI 2SK386 1855 0658 8 TRANSISTOR MOSFET N CHAN E MODE SI 2SK386 1854 0810 2 TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1854 0810 2 TRANSISTOR NPN SI PD 625MW 200 2 1854 0810 1854 0810 e TRANSISTOR NPN SI PD 625MW FT 200MHZ 1854 0810 1853 0459 1854 0810 1855 0459 TRANSISTOR PNP SI PD 625MW FT 200MHZ TRANSISTOR NPN SI PD 625MW FT 200MHZ TRANSISTOR PNP 51 PD 625MW FT 200MHZ 1855 0459 1854 0810 1853 0459 LN n9 UN 0811 3621 0764 0031 0764 0031 0698 0085 0698 0085 RESISTOR 8 5 6W PW TC 0 50 RESISTOR 47K 5 2M MO 0 200 RESISTOR 47K 5 2W MO TC 0 200 RESISTOR 2 61K 1 125W F TC 0 100 RESISTOR 2 61K 1 125W F TC 0 100 081
28. 125W TC O0 100 RESISTOR 825 1 125W TC 0 100 TERRE RE RESISTOR 825 1 125W 0 100 RESISTOR 825 1 125W 0 100 F F RESISTOR 825 1 125W F 0 100 F F RESISTOR 825 1 125W TC 0 100 RESISTOR 825 1 125W TC 0 100 E RESISTOR 825 1 125W TC 0 100 RESISTOR 825 1 125W TC 0 100 RESISTOR 825 1 125W TC 0 100 RESISTOR 1 1 125W TC 0 100 RESISTOR 511 1 125W TC 0 100 UP RESISTOR 316 1 125W TC 0 100 RESISTOR 464 1 125W 0 100 RESISTOR 464 1 125M F TC 0 100 RESISTOR 1K 1 125W TC 0 100 NETWORK RES 10 SIP470 0 OHM X 9 gt RESISTOR 4 64K 1 125wW 0 100 04278 66540 0180 3363 CACO225U104M 0160 4832 0160 4822 02250104 02250104 CACO2Z5U104M 02250104 02250104 0160 4822 2110 0742 C4 1 8 T0 825R F C4 1 8 T0 825R F C4 1 8 TO0 825R F C4 1 8 T0 825R F C4 1 8 T0 825R F C4 1 8 TO 825R F C4 1 8 TO 825R F C4 1 8 T0 825R F C4 1 8 TO 825R F C4 1 8 T0 825R F C4 1 8 TO 825R F C4 1 8 T0 825R F C4 1 8 T0 825R F C4 1 8 TO 825R F C4 1 8 T0 825R F C4 1 8 T0 825R F C4 1 8 TO 825R F C4 1 8 TO 825R F C4 1 8 TO 1001 F CT4 1 8 TO 511R F CT4 1 8 TO 316R F 4 1 8 0 4640 4 1 8 170 4640 4 1 8 70 1001 2104471
29. 20 3 REPLACEABLE PARTS LISTS The replaceable parts for the A31 Handler Interface board are listed in Table 4 A31 2 4 20 4 COMPONENT LOCATIONS d C D lt C D a p t The component locations on the A31 Handler Interface board and the board connector pin assignments are shown in Figure 4 A31 1 4 20 5 SCHEMATIC DIAGRAMS The schematic diagram of the A31 handler interface board is shown in Figure 4 A31 2 4 A31 1 Table 4 A31 2 A31 Handler Interface Replaceable Parts List 1 2 Reference HP Part C m Mfr 04278 66531 HANDLER IF OPTION 202 04278 66531 0160 4852 0160 4822 0160 6561 0160 6561 0160 6561 CAPACITOR FXD O1UF 10 100VDC CER CAPACITOR FXD 1000PF 5 100VDC CER CAPACITOR FXD 0 10 20 50VDC CER CAPACITOR FXD 0 1UF 20 50VDC CER CAPACITOR FXD O 1UF 20 50VDC CER 0160 4852 0160 4822 CACO225U104M050A CACO225U104M050A CACO225U104M050A 0160 6561 0160 6561 0180 5217 CAPACITOR FXD O 1UF 20 50VDC CER CAPACITOR FXD O 1UF 20 50VDC CER CAPACITOR FXD 4 0UF 20 6 5VDC AL CACO225U104M050A CACO225U104M050A CACO225U104M050A 0990 0665 LED VISIBLE LUM INT 1MCD IF 20MA MAX 5082 4684 2110 0741 FUSE 1A 125V NTD VL 2110 0741 1251 5652 CONN POST TYPE 100 PIN SPCG 40 CONT 1251 5652 0757 0416 0698 5440 0698 5440 0698 5440 0698 5440 RESISTOR 511 1 125W 0 100 RESISTOR 196 1 125 0 100 F CT4 1 8 TO0 511R F F RESISTOR 196 1 125
30. 26 2 81N PLO Hud od b o D 0 wi 1 T qoe ve 04 05 0 bG ThY 02 03 h 00 01 1 LOND POW_FAIL 9 6018 9 A RESET E Q 8010 o R W LGNO Figure 1 A30 Handler Interface Component Locations 2018 ty 1018 R28 gt CHANGE 2 Page 4 A7 3 Table 4 A7 2 A7 Digital Control Replaceable Parts Lists 4 4 Change the version number to 1 11 See Parts Information Table at the end of this supplement Table 1 Parts Information CHANGE PAGE Note Reference Designator HP Description Part Number ERRATA 3 14 6 OPTOO2 04284 00210 04284 61610 I F Plate Flat Cable Assembly 0515 1551 Screw for Connector 0535 0031 Nut 0515 1550 Screw for Plate 7120 0382 Label 6 OPTOO2 04284 61615 Cable Assembly 1 A40 4 04278 66532 201 HANDLER IF 2110 0741 FUSE 1A 125V 2110 0046 FUSE 0 5A 125V 2110 0741 FUSE 1A 125V 1251 4822 CONN POST TP HDR 1251 8736 CONN POST TP HDR 1251 8736 CONN POST TP HDR 1251 4822 CONN POST TP HDR 1251 8736 CONN POST TP HDR 8159 0005 RESISTOR ZERO OHMS 8159 0005 RESISTOR ZERO OHMS 8159 0005 RESISTOR ZERO OHMS 1258 0141 JUMPER REM 1258 0141 JUMPER REM 1258 0141 JUMPER REM 1258 0141 JUMPER REM 1258 0141 JUMPER REM 04284 86302 04284 85403 04284 85404
31. 4 10 2 WIW AG Quv2 OR Uld VLXOLY gt gt gt 2222 OH 5 oo H3H 81X01V 501 quv2 QNVJ 6 nc 37 38 A9 35 36 12 33 3 A11 31 32 nc 29 30 5 CARD nc A10 nc CARD RU 27 28 ne CARD LDS 25 26 GND nc 23 24 nc MEM CARD 21 22 nc 06 19 20 D7 04 17 18 05 53 15 16 GND 01 13 14 02 A1 11 12 DO A3 9 10 A2 AS 7 8 A4 A7 5 6 A6 A13 3 4 A8 5V_MEM_CARD 1 2 ne 2 D lt lt e m pre ive Figure 4 A10 1 A10 Memory Card Component Locations 4 A10 3 NOTES 4 A10 4 4 17 A11 MOTHERBOARD SERVICE SHEET 4 17 1 CIRCUIT DESCRIPTION The A11 Motherboard is the common bus for all other boards 4 17 2 TROUBLESHOOTING AIDS No troubleshooting data is given for the A11 Motherboard The pin assignments on the A11 circuit side gives the information needed for troubleshooting see Figure 4 A11 1 4 17 3 REPLACEABLE PARTS LISTS The replaceable parts for the A11 Motherboard are listed in Table 4 A11 1 4 17 4 COMPONENT LOCATIONS The component locations on the A11 motherboard are shown in Figure 4 A11 2 4 17 5 SCHEMATIC DIAGRAMS A schematic diagram for the A11 Motherboard is not supplied the pin assignments give the information needed f
32. 4 6 4 8 4 COMPONENT LOCATIONS The component locations and pin assignments for the A1 board are shown in Figure 4 3 4 8 5 SCHEMATIC DIAGRAMS The A1 board schematic diagram is shown in Figure 4 4 4 A1 4 Table 4 6 A1 Power Supply Replaceable Parts List 1 5 Reference HP Part Mfr 04284 66501 ce POWER SUPPLY 04284 66501 0160 5969 0180 3253 0180 3253 0180 5253 0180 3253 0160 3969 0180 3586 0160 4835 0180 3600 0160 4801 0160 4835 0160 4835 0160 4830 0160 4830 0160 6812 0160 6812 0180 3600 0160 4834 0160 6561 0160 4822 0160 4833 0180 3583 0160 4833 0160 3454 0160 4832 0160 4835 0180 3597 0160 3456 0180 3600 0180 3600 0180 3600 0180 3587 0180 3587 0180 3587 0180 1075 0160 4808 0160 6561 0160 6561 0180 1075 0180 1075 0180 5664 8180 3603 0180 3603 0180 3603 0180 3603 1906 0313 1906 0006 ON UT OQ WN ON WW OS ENN NN RF 5 2 2 amp amp A ON NNNNO CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACIT
33. 80V 80V 80V 80V DIODE PWR RECT 400V DIODE PWR RECT 400V DIODE PWR RECT 400V DIODE PWR RECT 400V DIODE CT S BARR 40V 5 5 5A 200 2NS 00 35 200 2 5 00 35 200 2NS 0 35 200 2 5 00 55 15 037 037 055 DIODE ZNR 18V 5 00 35 PD 4W TC 09 DIODE ZNR 12 7V 2 DO 35 PD 4W DIODE SWITCHING 80V 200MA 2NS 0 35 DIODE ZNR 9 1V 5 00 55 PD 4W TC 069 DIODE ZNR 5 1V 5 DO 55 PD 4W TC 035 DIODE ZNR 12 7 2 00 35 PDz 4WMW DIODE SWITCHING 80V 200MA 2 5 00 55 DIODE ZNR 18V 5 DO 35 PDz 4W DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING 80V 80V 80V DIODE PWR RECT 400V DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING 80V 80V 80V 80V 200 2NS 00 55 200 2NS 0 35 COOMA 2NS DO 35 1A 200 2NS 00 35 COOMA 2NS 00 35 200 2 5 00 35 200MA 2 5 00 55 09 LED LAMP LUM INT 2MCD IF 25MA MAX BVR 5V LED LAMP LUM INT 2MCD IF 25MA MAX BVR 5V THERMISTOR SURGE PTCTR BKDN V DC 250V 4 A1 6 Table 4 6 A1 Power Supply Replaceable Parts List T 2 5 Reference HP Part Mfr 9N171 9N171 9N171 9N171 9N171 28480 9N171 9N171 28480 28480 9N171 9N171 9N171 9N171 9 171 9 171 9 171 9 171 28480 28480 28480 28480 28480 28480 28480 9N171 9N171 9N171 9N171 14435 14433 14433 14433 28480 28480 28480 94171 28480 28480 28480 98171 28480 98171 98171 98171 14433 9N171
34. ABBREVIATION 78 ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS 8 CAPACITANCE IN MICROFARADS uF INDUCTANCE IN MICROHENRIES LH Figure 4 A9 A13 A90 A91 2 A9 A13 A90 and A91 Schematic Diagram 4 A9 A13 A90 A91 7 4 16 A10 MEMORY CARD INTERFACE SERVICE SHEET 4 16 1 CIRCUIT DESCRIPTION The A10 Memory card board contains only connectors for the 7 CPU board and the Memory Card 4 16 2 TROUBLESHOOTING AIDS No troubleshooting data is given for the A10 Memory Card I F board The pin assignment list gives the information needed for troubleshooting 4 16 3 REPLACEABLE PARTS LISTS The replaceable parts for the A10 Memory Card F board are listed in Table 4 A10 1 4 16 4 COMPONENT LOCATIONS The component locations for the A10 Memory Card Board are shown in Figure 4 A10 1 4 16 5 SCHEMATIC DIAGRAMS A schematic diagram for the A10 Memory Card F board is not supplied the pin assign ments give the information needed for troubleshooting E gt D lt CD CD 5 4 10 1 Table 4 A10 1 A10 Memory Card Replaceable Parts Lists Reference HP Part ir Mfr 04278 66510 i MEM CARD SOCKET 28480 04278 66510 0160 6561 CAPACITOR FXD iUF 20 SOVDC CER 16299 02251104 050 1251 3025 CONN POST i00 PIN SPCG 54 28480 1251 3025 1252 1951 CONN 38PIN 28480 1252 1951
35. AL 0180 3602 LAMP NEON 90V 2140 0127 CONVERTER DCIAC 04278 61101 CONNECTOR 3 PIN M METRIC POST TYPE 1251 4938 CONNECTOR 3 PIN M METRIC POST 1251 4938 INDUCTOR 68UH 10 7 50 0 60 9140 1278 RESISTOR 1M 5 1W CC TO 0 1000 GB1055 RESISTOR 1M 5 1W CC TO 0 1000 GB1055 RESISTOR 215K 1 125W TC 0 100 CT4 1 8 TO0 2153 F RESISTOR 261K 1 125W TC 0 100 CT4 1 8 T0 2613 F T C D lt O 2 D 4 A9 A13 A90 A91 3 Table 4 A9 A13 A90 A91 3 A90 and A91 Boards Replaceable Parts List Em pop ee mM 04278 66590 KEYBOARD DISPLAY CONTROL 28480 04278 66590 04278 61102 LCD MODULE 28480 04278 61102 4 A9 A13 A90 A91 4 NOTES Bem c D gm lt D e m 1 4 A9 A13 A90 A91 5 e vi 4555 5555 255545555 285955890955 555645565 58 57 56 55 54 A9 Component Locations A13 Component Locations Figure 4 A9 A13 A90 A91 1 A9 Keyboard A13 DC AC Converter Component Locations 4 A9 A13 A90 A91 6 From To From From From from From From From From From From From To From From From From A7X18 13 LGND 47 18 8 A7X1 A 6 7 18 5 47 18 4 47 28 32 24 32 A7X28 31 47 24 3 47 28 30 A7X2A 30 A X2B 29 A7X24A 29 LGNO A7X2A 20 7 28 19 47 2 19 2 13 A7X2A 12 LGNO LOND From AIX2 A90 KEYBOARD DISPLAY CONTROL MODULE LO Jil 8 17 ZCLX I6
36. BUILT En lt gt 3 C v 4 A5 1 These troubleshooting aids provide a list of test points in Table 4 A5 2 The test point loca tions are shown in Figure 4 A5 1 Table 4 A5 2 A5 Test Points List DIVIN Crystal oscillator signal DIVOUT _ Signal divided the DIVIN signal by QUAST O quasi sine wave signal 90IN 90 quasi sine wave signal 900UT 90 reference signal 20 Hz to 5 kHz ODEG 0 reference phase signal ATT DAC Output signal from the DAC ATT Output signal from the attenuator OUT Output signal to Hcur Terminal 9 9 V DC 5A 5 V DC A 9 9 V DC 5B 5 V DC B GND Ground Line 4 5 2 4 Service Sheets TPA TP8 14 7 TPI2 TPIO 45A TP5 TP3 GND ATTDAC 9 9 TP6 900UT QUAST 90IN ODEG pas OKO 9 d ERE A is i d us Mure i 69 S BA Wi 9 oeus o 9 1 6 b ii 88 83 ri A QUT ge E bd Ab ob 5 3 b 4 od T 4 i 229 59 OBE i N ogg M 0000000000000000 y 4 dl 299 T oe 3 Be 18 nm AE DIVIN TP2 DIVOUT Figure 4 A5 1 A5 Signal Source Test Points Locations 4 A5 3 NOTES 4 5 4 4 13 A6 VECTOR R
37. CER CACO225U104M050A 0160 6561 CAPACITOR FXD 0 10 20 50VDC CER CACO225U104M050A 0160 6561 CAPACITOR FXD 0 10 20 50VDC CER CACO225U104M050A 0180 3363 CAPACITOR FXD 22UF 20 25VDC CER 0180 3363 0180 3217 CAPACITOR FXD 4700 20 6 5VDC AL 0180 5217 0160 4822 CAPACITOR FXD 1000PF 4 57 100VDC CER 0160 4822 2110 0741 FUSE 1A 125V NTD VL 2110 0741 1251 5652 CONN POST TYPE 100 PIN SPCG 40 CONT 1251 5652 0698 6560 6 RESISTOR 10K 1 125W 0 25 0698 6560 0698 6362 8 RESISTOR 1K 1 125W 0 25 0698 6562 0698 5441 8 RESISTOR 215 1 125M 0 100 C4 1 8 T0 215R F 0698 5441 8j RESISTOR 215 1 125W F TC 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125M TC 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W TC 0 100 C4 1 8 T0 215R F 0698 3441 8 RESISTOR 215 1 125W 0 100 C4 1 8 TO 215R F 0698 5441 8 RESISTOR 215 1 125W F 0 100 C4 1 8 TO 215R F 0698 3441 8 RESISTOR 215 1 125W F TC 0 100 C4 1 8 T0 215R F 0 100 0698 3441 8 RESISTOR 215 1 125W C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125M TC 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W TC 0 100 C4 1 8 T0 215R F 0698 5441 8 RESISTOR 215 1 125W 0 100 C4
38. CT4 1 8 T0 4641 F SWITCH 8P SWITCH 8P IC CMOS 262144 256K STAT RAM 120 NS IC CMOS 262144 256K STAT RAM 120 NS PHOTO COUPLER PHOTO COUPLER PHOTO COUPLER OPTO ISOLATOR LED IC GATE IF 20MA MAX IC NMOS 65556 64K ELEC ER PROM 200 NS GATE TTL LS OR QUAD 2 PIN CMOS 6321P IC GATE TTL LS OR QUAD 2 PIN 4 A40 3 3101 2831 3101 2831 HM62256LP 12 HM62256LP 12 1990 1179 1990 1179 1990 1179 5082 4516 HN58064P 30 SN745LS52N 1820 4888 SN74LS32N T ve D lt 2 pur n Table 4 A40 2 A40 Scanner Interface Replaceable Parts list 2 2 Reference HP Part Mfr 911 1820 1112 FF TTL LS D TYPE POS EDGE TRIG SN74LS74AN 1818 3801 ie NMOS 65536 64K ELEC ER PROM 300 NS HN58064P 30 1820 1200 5 IC INV TTL LS HEX 741 05 1820 2075 4 IC TRANSCEIVER TTL LS BUS OCTL SN74LS245N 1820 2075 4 IC TRANSCEIVER TTL LS BUS OCTL SN74LS245N 1820 1199 INV TTL LS HEX 1 INP SN7 4LSOAN 1 1820 2075 4 TRANSCEIVER TTL LS BUS OCTL SNT4LS245N 1820 2075 4 TRANSCEIVER TTL LS BUS OCTL SN74LS245N 1820 2075 4 TRANSCEIVER TTL LS BUS OCTL 5 7415245 0 04278 80004 PAL 04278 80004 1252 1598 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96B50POOF50N9 4040 0748 4040 0752 EXTR PC BD BLK POLYC 62 BD THKNS 4040 0
39. Figure 1 44 A30 Handler Interface Component Locations Replace the component locations with Figure 1 Page 1 A30 5 Figure 1 45 A30 Handler Interface Schematic Diagram Partially change the schematic diagram as described next e Rename F1 to F2 e Add F1 to the 5V line as shown next A16 5VOUT A17 5VOUT A184 5VOUT e Replace W2 W3 and W4 with J3 and W2 as shown next T5V 12V J3 W2 e Replace W5 W6 and W7 with J4 W3 as shown next _ 12 J4 W3 e Replace W8 with J5 and W4 as shown next e Replace W9 W10 and W11 with J6 and W5 as shown next 666 6 666 A30X18 Pin 9018 0 G S01U o 7018 4 0 INT nc 9 DL TRG 1NT LGND LGND 1 LGND A30418 0 LGND 2 LGND oa LGND 3 LGND O 5V 4 5 nc nc 5 5 5V 5 EXT 0CV1 o 5V 6 5V 5 EXT DCV1 COH 120 7 12 5V EXT OCV1 COM og LGND 8 LGND EXT OCV2 EXT 0CV2 COM 9 nc EXT ocv2 2 d nc nc EXT TRIG 0H nc nc EXT_TRIG 1WOEX oo nc nc AUX B1N ALARM b LIY nc nc of BINS EXT 0 1 4 9 nc nc 81N9 9 Ext ocv oo b nc nc 81N8 8 nc HANOLER 8187 KEYLOCK o LGNO 680 81N6 6 UNBAL oa o 0 015 81N5 ne A o 012 013 And gt SRES 00
40. Ground Line Voltage Signal Across the DUT 5 V DC 12 V DC 412 V DC 4 A3 2 2 TP8 9 IV GND 5 12 12 57 SM 8 Cg d ee RS e fi o C ES Q R9 99 9 168 d oo 9 C21 G RI 80 n GAG F180 088s 9 G R25 Q R22 G R36 35 G R27 O RIE 0 53 09 651 O R52 R60 O e 0 439 O R38 Q eo O REI C600 U24 9 Q R602 6 Q R601 6 600 oooogooooGgooooBOocooBoooolBoooB n 4 Service Sheets 4 TPS LC GND Q R210 6 Q R201 6 8325 J SSO 4 8 DO CF G RI22 6 BRIO 0 123 6 do D C109 jJOo RI24 6 G 8203 6 9 1204 0 200 o 94459 ai Te 103 m e 63 oe 00000000000 000 n 181904 8 0000000000 00000 Q R319 6 Q R320 6 Figure 4 A3 1 A3 Modulator Component Locations Std 4 A3 3 TP TP2 TP7 TP8 TPO IV GND 45 2 2 TP5 LC ERR GND i sot zi gung v toin 0 M QE E De a the tese genus WOO EY aw 5 Q R39 6 Q R38 e oF am jo SRNO B 0508 Senis 0501
41. LOCK INT LDS LGND LOC 0 LOC 90 MEM CARD NULL OUT POW FAIL REAR TRG INT RESET R W STD IF SCANNER SCANNER INT UDS VMA VPA 8F 12VFAN 45V MEM CARD Clock signal for A D converter Address bus lines Analog board card select signal Address bus lines for the analog boards Data bus line for controlling the analog boards Analog Board Data Strobe Signal Data Read Write Signal Address strobe signal Address bus line Bias current access signal Memory card lower data strobe Memory card read write signal Data Bus Line for the digital boards Data acknowledge signal Interrupt signal for A D End Of Conversion Test Frequency Signal Halt signal Handler interface access signal Trigger interrupt signal from Handler Interface Board identification signal Interrupt from the HP IB interface Interrupt to the HP IB interface Interrupt from the keyboard Keyboard and display control signal Keylock interrupt signal from Handler Interface Lower data strobe Logic circuits ground line Local 0 signal Local 90 signal Memory card access signal Null detector output signal ALARM signal to the handler interface Trigger interrupt signal from the external trigger connector on the rear panel Reset signal Read Write signal HP IB access signal scanner interface access signal Interrupt signal from the scanner interface Upper data strobe Valid memory access
42. M3 Keyboard Unit Bezel Rubber Key Nut Cable Assembly DC AC Converter Board Screw Shield Case Edge Saddle Screw Washer Cable Assembly 3 pin Cable Assembly 12 pin LCD Unit A91 Cable Assembly 2 pin Plate Filter Bezel Magnet Coil Assembly D Lcur Magnet Coil Assembly C Lpot Magnet Coil Assembly B Hpot Magnet Coil Assembly A Hcur Capacitor 470 pF Diode Cable Assembly 6 gt mE 0 ne C nn lt D Table 3 5 Front Panel Components Pett 2284 Hec PACKART 04284 00201 04284 00202 04278 40001 3150 0541 04278 00205 0515 1550 04278 25001 04278 40005 0370 2446 1250 0252 5040 3324 5040 3325 2950 0035 0360 1158 1510 0130 2190 0084 2950 0006 3101 2862 Panel Front Sub Panel Bezel Display Filter Plate Screw Rubber Key Bezel Key Knob BNC Connector Insulator outside Insulator inside Nut Lug Binding Post Washer Nut Power Switch included in PN 04284 61611 Power Switch Cable Assembly PEE SK CUN TRO RERUM ke 04278 00601 0515 1550 04278 00602 0515 1007 04278 01204 0515 1550 0515 1551 04284 00604 04284 00602 0515 1550 04284 00603 0515 1005 04284 00635 0515 0914 04284 00636 0515 1005 04284 00638 0515 0914 04284 00639 0515 1005 04284 00640 0515 09
43. MH EIS REG 8 16 INT ree es R W lt 8 15 lt zac iS RESET NM END n S 03 lt 4 1 lt 4 lt 05 a 12 06 p 07 lt 8 10 4 10 At lt 8 9 lt EO RN LC UN A14 g 8 cM 15 lt 8 _ lt 858 7 i lt 8 6 lt 4 6 XEY OSP CTL 12 lt 9 5 12v lt 1 5 lt 4 lt 4 lt 8 3 lt 4 3 Y LGNO lt 2 LOND 2 LGND B 1I LON O 4 1 A13 DC AC CONVERTER SCO SC sc2 5 3 SC4 SCS SCS 5 7 RLO At RLZ A9 KEYBOARD A9I LCD MODULE Ji 12 e Yo 41 Le 10 XSCL lt e N C vec lt hoa t x04 lt x02 lt N O wo wo J2 2 lt 1 SOFTKEY SOF TKEY2 SOFTKEYS e I 255 2552 65535 6 59 22 43 CONTRAST Control TUE NER 527 1 528 4 NOTES 1 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX
44. SES a E 46 Range Resistor Wee EUER Ich SENSE C 95 4 gt lt Figure 3 11 Analog Section Block Diagram Std 3 31 ANALOG SECTION BLOCK DIAGRAM OPT 001 EE 825 09 High Voltage Amp 110 100 j 5 n 5 SIGNAL SOURCE I Quasi Sine Wave Generator O filter AC Level Control OUTPUT AMP OOkH 300182 1 gt Vovioble active DC bias 90 filter x joy cce 1 5 o o EN V 90DEG ODEG TO A2 rn UP D A3 RANGE RESISTOR A6 VECTOR RATIO DETECTOR Channel Multiplexer Range Resister fe E 2 ICH SENSE 2 MODULATOR __ OSC LEVEL Normalizer 2 1 Converter Y V re em TEN Active Inductor f OSC LEVEL Normalizer 9O PHASE TRACKING gt 7 gt ODEG SODEG from A5 Figure 3 12 Analog Section Block Diagram Opt 001 3 33 3 10 FAULTY BOARD ISOLATION When repairing the HP 42844 firstly you must find the faulty board This paragraph pro vides the information for isolating the faulty board 3 10 1 SELF TEST Self tests are the 4284A s special functions used for making troubleshooting the digital con trol group The 4284A s self tests can be categorized into three types 1 power on self test 2 self test selected with softkeys and 3 self t
45. e 9 0 2 833 208 9595 P Boo 0104 jt 0000000000 00000 89445 p apu O h 21 00 R516 o 20 o 5666 452 ee a Res Gea Gel 9090000099099 d hon 7 199 E ev P QUERN 3 R22 R25 90518 9841000 994 tte 1 Pos RE 52 5 E 69 o AIS G CIS uc cm R205 9 2 0 E 9 R48 5 6 96 000000 Q R23 6 O R24 022 8 OG 51812212 Qon 8 12208 920 0 6 B CR23 O I CR21 O MM on 5 eT 0 83096 eges y 5 aC 8 of fog qa E 25 8 3 T 5 1s eet i ex oi RESE io 999999 CH 8 eoo 405 99886398599089999890008000 086561 col 58 LT PEEK LLLI LILIA LLAKI LIIL 5 PC O Be Tae Figure 4 A3 2 A3 Modulator Component Locations Opt 001 4 A3 4 4 11 A4 HIGH POWER AMPLIFIER DC BIAS SERVICE SHEET The A4 board is covered by the exchange assembly program The part number of an A4 rebuilt exchange board is listed in Table 4 A4 1 Table 4 A4 1 A4 High Power Amplifier DC Bias Replaceable Parts List Reference HP Part C e Mfr A4 04284 66564 1 BIAS HIGH POWER 28480 04284 66564 04284 69564 DC BIAS HIGH POWER AMP RE BULILT 2 0 04284 69564 A4 4 A4 1 Bow C lt O e 2 D e p n These troubleshooting aids provide a list of test points in Ta
46. for the adjustment program Paragraph 2 7 3 gives the adjustment program closing procedure 2 7 1 GENERAL INFORMATION Table 2 3 lists the adjustment program specifications Figure 2 1 shows the adjustment program flow Table 2 3 Adjustment Program Specification HP Part Number 04284 65001 5 inch floppy disk 04284 65008 3 5 inch floppy disk Language HP BASIC rev 5 0 and above Binary Requirement GRAPH GRAPHX HPIB MAT KBD CLOCK ERR IO CRTA COMPLEX CRTX HP BASIC rev 5 0 Computer Requirement HP 9000 series 200 or series 300 computer with more than 1 M byte of RAM Write Protection Adjustment program is not write protected Using a backup copy for adjustment program is recommended Do not copy the program for purposes other than backup Adjustment for Options Adjustment program automatically identifies the HP 4284A s Option 001 and Option 006 and perform the adjustment according to the Options installed 2 6 START HP 4284A HP IB STEP 2 Address Input MAIN MENU DC Bias Level Adjustment Test Signal Level impedance Measurement option 001 only Level Monitor Adjustment Adjustment EEPROM Data STEP1 Copyright and other information are displayed Exit softkey SIEP 3 STEP 4 STEP2 The HP 4284A s HP IB address must be registered to the adjustment program to control the HP 4284A by HP IB STEP3 Adjustments be selected using the softkeys The program is f
47. implied warranties of merchantability fitness for particular purpose Exclusive Remedies The remedies provided herein are buyer s sole and exclusive remedies Agilent Technologies Shall not be liable for any direct indirect special incidental or consequential damages whether based on contract tort or any other legal theory Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For any assistance contact your nearest Agilent Technologies Sales and Service Office Addresses are provided at the back of this manual vi SECTION 1 1 1 1 2 1 3 1 4 TABLE OF CONTENTS GENERAL INFORMATION INTRODUCTION MANUAL ORGANIZATION INSTRUMENT COVERED BY THIS MANUAL RECOMMENDED TEST EQUIPMENT SECTION 2 ADJUSTMENTS 2 1 2 2 2 3 2 4 2 5 2 6 INTRODUCTION SAFETY CONSIDERATIONS TEST EQUIPMENT ADJUSTABLE COMPONENTS ADJUSTMENT INTERACTION INITIAL OPERATING PROCEDURE ADJUSTMENT PROGRAM 2 7 1 General Information 2 7 2 Initial Operating Procedure 2 7 3 Closing Procedure _ POWER SUPPLY ADJUSTMENTS 2 8 1 Power Supply Switching Frequency Adjustment 2 8 2 Power Supply Output Voltage Adjustment SENSE AMPLIFIER DC OFFSET ADJUSTMENT DC BIAS LEVEL ADJUSTMENT TEST SIGNAL LEVEL LEVEL MONITOR ADJUSTMENTS IMPEDANCE MEASUREMENT ADJUSTMENTS 1 1 1 1 1 1 2 1 2 1 2 1 2 2 2 2 2 4 2 6 2 7 2 9
48. of one year from the date of shipment except that in the case of certain components listed in General Information of this manual the warranty shall be for the specified period During the warranty period Agilent Technologies will at its option either repair or replace products that prove to be defective For warranty service or repair this product must be returned to a service facility designated by Agilent Technologies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies warrants that its software and firmware designated by Agilent Technologies for use with an instrument will execute its programming instruction when property installed on that instrument Agilent Technologies does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free Limitation Of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside the environmental specifications for the product or improper site preparation or maintenance No other warranty 1 expressed or implied Agilent Technologies specifically disclaims the
49. procedures in this service manual 2 4 DISASSEMBLY TOP COVER REMOVAL To gain access to the adjustment points perform the following procedure 1 Remove the two plastic instrument feet located at the upper corners of the rear panel 2 Fully loosen the top cover retaining screw located at the back of the top cover 3 Slide the top cover towards the rear and lift it off 4 Loosen the five screws that secure the right hand side top shield plate You don t have to completely remove the screws DO NOT REMOVE THE LEFT HAND SIDE TOP SHIELD PLATE ON WHICH WARN ING MESSAGE IS PRINTED EXCEPT FOR THE POWER SUPPLY ADJUSTMENT mM gt cx c n a e 5 Slide the top shield plate towards the front and lift it off TO PROTECT AGAINST POSSIBLE ELECTRICAL SHOCK USE INSULATED TOOLS TO MAKE ALL ADJUSTMENTS 2 5 2 7 ADJUSTMENT PROGRAM The Adjustment Program is required when performing parts of the HP 4284A s adjustments Table 2 2 shows which adjustments require the adjustment program Table 2 2 Adjustment Program Requirement Adjustment Name Paragraph Adjustment Program Power Supply Adjustment Not Required Sense Amp DC Offset Adjustment Not Required DC Bias Level Adjustment Required Test Signal Level Monitor Adj Required Impedance measurement Adjustment Required Paragraph 2 7 1 gives general information about the adjustment program Paragraph 2 7 2 gives the initial operating procedure
50. that on the title page of this manual see APPENDIX A MANUAL CHANGES For information concerning serial number prefixes not listed on the title page or in the Man ual Change supplement contact the nearest Hewlett Packard office 1 4 RECOMMENDED TEST EQUIPMENT Table 1 1 lists the equipment required for adjustment performance testing and trouble shooting the HP 4284A Other equipment may be substituted if it meets or exceeds the critical specifications given in Table 1 1 1 2 Table 1 1 Recommended Test Equipment 1 of 2 Electronic Frequency 20 Hz to 1 MHz HP 5334B Counter Accuracy lt lt 0 01 t M m e ER ey RMS Frequency 20 Hz to 1 MHz HP 3458A Voltmeter Voltage range 5 m to 20 Vrms Accuracy lt lt 3 0 DC Voltmeter Voltage range 40 V to 40 V HP 3458A Accuracy lt lt 0 1 Oscilloscope Band Width 10 MHz 541110 10 mV div min Oscilloscope Division Ratio 10 1 10431A Probe Input Resistance 1 0 Standard No substitute HP 16380A Capacitor HP 16380C Standard No substitute HP 16074A Resistor Resistor No substitute HP PN 04284 65004 100 ohm Interface Box No Substitute HP PN 04284 65007 DC Power 5 V 0 1 A HP 6214C Source Adapter BNC f to Dual Banana HP PN 1251 2277 Tee BNC m fY f HP PN 1250 0781 Cable BNC m to BNC m 30 cm HP PN 8120 1838 Test Leads 2 Alligator Clips Dual HP 11002A Banana Pl
51. working voltage slow blow screw selenium section s semiconductor silicon silver slide spring special stainless steel split ring steel W H H M UM H HM H Hu M tantaium time delay toggle thread titanium tolerance trimmer traveling wave tube micro 1075 variable dc working volts z with z watts z working inverse voltage z wirewound z without 0001 9700 gt M lt 0 D or n 4 5 2 REPLACEABLE PARTS LISTS Table 4 3 lists the names and addresses of the manufacturers identified by Mfr Code in the parts lists most cases the information given for each part includes the following information 1 HP part number 2 Quantity used in the assembly given once at the first occurrence of the part number 3 Five digit code representing the typical manufacturer 4 Manufacture s part number _ Table 4 3 Component Manufactures Manufacturer Name NEC ELECTRONICS LTD TOSHIBA CORP HITACHI AMERICA LTD ALLEN BRADLEY CO INC TEXAS INSTRUMENTS INC ITU FASTEX K D I PYROFILM CORP MOTOROLA INC SEMI COND PROD PRECISION MONOLITHICS INC FAIRCHILO CORP BURNDY CORP VARO SEMICONDUCTOR INC CTS CORP BERNE DIV SPRAGUE ELECTRIC SEMICON ITT SEMICONDUCTORS DIV CORNING ELECTRONICS MEPCO CENTRALAB INC TRANSITRON ELECTRONIC CORP ANALOG DEVICES INC CORNING ELECTRONICS NATIONAL SEMICONDUC
52. 0 Blue Lagoon Drive Suite 950 Miami Florida 33126 U S A tel 305 267 4245 fax 305 267 4286 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victoria 3131 tel 1 800 629 485 Australia
53. 0 e 0 1 0 1 0 1 1GND 2 Y Tei 10 R25 9 vi R28 1 6 R27 1K vt M X M e lt gt o X P 4 a 6 A A QD ARM r aurem mom ce e db dd eA HUP iue db m M i M M M t 40 4 ae Figure 4 A30 2 A30 Handler Interface Schematic Diagram ALARM INDEX 3 215 RHAI 12 5 6 m o m e e i a ey wy rs sw 6 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR 37 2 Pull vp i Restos j f j s sj 45 MEE an NEN gt i UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS 2 CAPACITANCE IN MICROFARADS uF INDUCTANCE IN MICROHENRIES uH EXT Dcvi EXT OC S ej j j PLO 5REJ ZOYFL ZUNDFL Bing QUT OF BINS BIN1 B1N2 B1N3 B1N4 BINS BING B1N7 1 B1N9 BINIO ZPH PLO SRES 7O FL
54. 037 RESISTOR 46 4 1 125W TC 0 100 0698 4037 A1R83 0698 3162 RESISTOR 46 4K 1 125M 0 100 CT4 1 8 T0 4642 F 1884 0698 5162 RESISTOR 46 4K 1 125 0 100 CT4 1 8 T0 4642 F ATRV1 1901 1217 DIODE VRTS 150V 1901 1217 1 2 1901 1217 DIODE VRTS 150 1901 1217 1 1 9100 4618 XFMR POWER 9100 4618 A1T2 9100 4499 TRANSFORMER L PINS 10 amp 11 5 3 MH 30 9100 4499 113 9100 4764 TRANSFORMER 9100 4764 A1T4 9100 4765 TRANSFORMER 9100 4765 A1TP1 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1655 1 2 0360 1653 CONNECTOR SGL CONT 045 IN BSC S2 0360 1653 A1TP3 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 A1TP4 0360 1653 CONNECTOR SGL CONT 045 1 5 52 0360 1653 1 5 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 6 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 7 0360 1653 CONNECTOR SGL CONT PIN 045 IN BSC SZ 0360 1653 1 8 0360 1653 CONNECTOR SGL CONT PIN 045 5 52 0360 1653 1 9 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 10 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 11 0360 1655 CONNECTOR SGL CONT 045 5 52 0360 1653 1 12 0360 1653 CONNECTOR SGL CONT PIN 045 IN BSC SZ 0360 1653 1 13 0360 1653 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 14 0360 1655 CONNECTOR SGL CONT 045 IN BSC SZ 0360 1653 1 15 0360 1655 CONNECTOR SGL CONT 045 IN BSC SZ 0
55. 04M050A 0160 6561 CAPACITOR FXD 0 10 CACO225U104M050A 1990 0665 LED VSBL RED _ 1990 9665 2110 0742 FUSE 1 5A 125V 2110 0741 1251 5650 CONN POST TYPE 1251 5650 0698 3155 RESISTOR 4 64K 1 125W 0 100 CT4 1 8 T0 4641 F 0757 0416 RESISTOR 511 1 125W 0 100 CT4 1 8 T0 511R F 1820 2485 IC SN75160AN 1820 2485 1820 2483 IC SN75161AN 1820 2483 1820 2548 TMS9914ANL 1820 2548 1820 1433 IC SN74LS164 N 1820 1433 1820 2777 SN74ALS161 1820 2777 1820 2657 SN7G4ALS32N 1820 2657 1820 2634 SN74ALSO4N 1820 2654 1820 3576 SN74ALSOSAN 1820 5576 1820 5707 1 744 1 541 1820 5707 1820 5121 SN74ALS245 1820 3121 8159 0005 RESISTOR ZERO OHMS 22 AWG LEAD DIA 8159 0005 1252 1598 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96830PO0F50N9 4040 0748 EXTR PC BD BLK 4040 0748 4040 0750 EXTR PC BD RED 4040 0750 4 A20 2 NOTES 4 Service Sheets 4 A20 3 o i e amp 9 s JiB 724 TP2 TP3 TPR me eR on 2905950550555 051 aooomoooomnooo whi X18 1 Figure 4 A20 1 A20 HP IB Interface Component Locations 4 20 4 X1B 27 15 X1B 15 X1A 16 X1A 17 X1B 28 X1B 29 X1A 30 X18 32 X1A 31 X1B 4 X18 5 6 X1A 4 X1A 5 X1A 6 1 X1A 2 3 X1B 17 X18 28 X1A 27 A20 HP IB INTERFACE DTACK 12 STD HALT E R W s 38 05 32 16M 7 5 6 5VL 1 1 58 2 LGND 2B
56. 1 3621 0764 0031 0764 0031 CT4 1 8 TO 2611 F CT4 1 8 T0 2611 F OONN 0764 0031 0764 0031 0757 1094 0698 3160 0698 3455 RESISTOR 47K 5 2W MO 0 200 RESISTOR 47K 5 2W MO TC 0 200 RESISTOR 1 47K 1 125W F TC 0 100 RESISTOR 31 6K 1 125W 0 100 RESISTOR 261K 1 125W TC 0 100 0764 0031 0764 0031 CT4 1 8 T0 1471 F CT4 1 8 T0 3162 F CT4 1 8 T0 2615 F 0757 0280 0757 0442 0757 0442 0757 0280 0698 5457 RESISTOR 1K 1 125W TC 0 100 RESISTOR 10K 1 1254 TC 0 100 RESISTOR 10K 1 125W Tc 0 100 RESISTOR 1K 1 125 0 100 RESISTOR 316K 1 125W 0 100 4 1 8 1001 4 1 8 0 1002 CT4 1 8 TO 1002 F CT4 1 8 TO0 1001 F 0698 5457 Os UI SO O UA T O c 0698 2457 0698 3457 RESISTOR 316K 1 125W 0 100 6 0811 1668 9 RESISTOR 1 5 5 2W PW TC 0 400 BWH2 1R5 J 0757 0403 e RESISTOR 121 1 125W TC 0 100 CT4 1 8 TO 1216 2100 5207 1 RESISTOR TRMR 5K 10 C SIDE ADJ 1 TRN 2100 5207 3 0757 0280 RESISTOR 1K 1 125W 0 100 CT4 1 8 TO 1001 F 4 A1 7 T vo D lt lt C umm D D Table 4 6 A1 Power Supply Replaceable Parts List 4 5 Reference HP Part Mfr CT4 1 8 TO 2151 F CT4 1 8 T0 1002 F CT4 1 8 TO 2151 F CT4 1 8 T0 4641 F CT4 1 8 T0 4641 F
57. 14 04284 00641 0515 1005 3 11 Table 3 6 Shield Case And Heat Sink 1 of 3 Board Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Heat Sink for CR28 CR29 CR30 and CR39 Screw Pan Head Screw Pan Head for CRs Shield Plate Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head e gt gt 2 2 o t0 D lt O 4 rev a b 4 rev c d 04284 00660 0515 0914 04284 00632 0515 1005 04284 01202 0340 1006 0515 1550 4040 1907 04284 00633 0515 0914 04284 00634 0515 1005 04284 00631 0515 0914 04284 00632 0515 1005 04284 01202 0340 1006 0515 1550 4040 1907 04284 00633 0515 0914 04284 00634 0515 1005 3 12 Table 3 6 Shield Case And Heat Sink 2 of 3 A4 Board rev a b A4 Board rev c d Shield on component side Screw Pan Head Shield on circuit side Large Screw Flat Head Heat Sink in 04284 00660 Insulator for 04284 01202 Screw for 04284 01202 Heat Sink Rubber on circuit side Shield on component side small Screw Pan Head Shield on circuit side small Screw
58. 1906 0316 1906 0517 1906 0316 1906 0316 1901 0050 1901 0050 1901 0050 1901 0050 1901 0731 1901 0751 1901 0751 1901 0731 1906 0314 1902 0964 1902 5188 1901 0050 1902 0957 1902 0951 1902 3188 1901 0050 1902 0964 1901 0050 1901 0050 1901 0050 1901 0731 1901 0050 1901 0050 1901 0050 1901 0050 1990 0486 1990 0486 0857 0337 NMN WNW CA CN ON CN CA Ul WN ux n UN CN CA CN ON N UN UN CN CANI IN CA CN C N NUN ON UN CI O UN DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING 80V 80V 80V SOV 80 200 2NS DO 35 200 2 5 00 35 200 2 5 0 35 200 2NS 00 55 COOMA 2NS DO 55 DIODE ZNR 9 09V 2 DO 35 PD 4W DIODE SWITCHING 80V 200MA 2NS 00 35 DIODE SWITCHING 80V 200MA 2NS DO 35 DIODE ZNR 2 4V 5 00 55 PD 4W DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE ZNR 9 09V 80V 80V 80V 80V 80V 80 80 80V DIODE ZNR 2 4V 5 DO 35 PD 4W TC 200 2NS 00 35 COOMA 285 DO 35 200MA 2NS DO 35 COOMA 2NS 00 355 200 2NS DO 35 200MA 2NS DO 35 COOMA ANS 0 55 200MA 2NS DO 35 2 00 355 PD 4W DIODE ZNR 6 2V 5 DO 35 PD 4W DIODE CT RECT 200V DIODE CT RECT 200V 5A DIODE CT RECT 200V 5A DIODE CT RECT 200v DIODE CT RECT 200V DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING DIODE SWITCHING
59. 2 12 Range Resistor Opt 001 2 9 2 10 2 11 2 12 Hi PW Amplifier Opt 001 2 10 2 11 Signal Source 2 11 Vector Ratio Detector 2 11 2 12 Ci Lr 92 D Digital Control 2 10 2 11 2 12 Keyboard None Mother Board None DC AC Converter None HP IB Interface None Handler Interface Opt 201 None Handler Interface Opt 202 None Scanner interface Opt 301 None Bias Current I F Opt 002 None Keyboard Display Control None LCD Module None Option 001 only 2 3 _ 2 6 INITIAL OPERATING PROCEDURE Before you start perform the OPERATIONAL VERIFICATION and the DISASSEMBLY pro cedures given in the following paragraphs to prepare the HP 4284A for adjustment The HP 4284A must be initialized set to its initial control settings before each adjustment Exceptions to these settings will be noted as they occur After you complete an adjustment reinitialize the HP 4284A NOTE The HP 4284 is initialized in following three conditions 1 HP 4284A is turned ON 2 HP 4284A receives an HP IB RST command 3 SYSTEM RESET is performed OPERATIONAL VERIFICATION Check that the line voltage selector switch on the rear panel of the HP 42844 is properly set Turn the HP 4284A ON and let it warm up and stabilize for at least 30 minutes After the warm up period initialize the instrument If the HP 42844 fails its self test or if you can t initialize it refer to the troubleshooting
60. 274 RESISTOR 38 3 1 125W 0 100 RESISTOR 1 21K 1 125W TC 0 100 RESISTOR 1 21 1 125W 0 100 0698 3435 CT4 1 8 TO 1211 F CT4 1 8 TO 1211 F WI uo RESISTOR 10K 1 125W F 0 100 RESISTOR 5 11K 1 125W TC 0 100 RESISTOR 10 1 125W F TC 0 100 RESISTOR 10 1 5W F TC 0 100 RESISTOR 3 16K 1 125W F 0 100 0757 0442 0757 0458 0757 0546 0757 0984 0757 0279 CT4 1 8 TO 1002 F CT4 1 8 TO 5111 F 0757 0346 0757 0984 CT4 1 8 T0 3161 F _ 0757 0279 0698 0085 0698 0085 0698 0082 0757 0546 RESISTOR 5 16 1 125W 0 100 RESISTOR 2 61K 1 125W 0 100 RESISTOR 2 61 1 125W 0 100 RESISTOR 464 1 125M F 0 100 RESISTOR 10 1 125W 0 100 CT4 1 8 T0 3161 F CT4 1 8 T0 2611 F CT4 1 8 TO 2611 F 4 1 8 0 4640 0757 0546 CT4 1 8 TO 101 F CT4 1 8 TO 101 F 0757 0401 0757 0401 RESISTOR 100 1 125W 0 100 RESISTOR 100 1 125W TC 0 100 4 1 8 Table 4 6 A1 Power Supply Replaceable Parts List 5 5 Reference HP Part Mfr A1R78 0698 0082 RESISTOR 464 1 125W 0 100 CT4 1 8 T0 4640 F A1R79 0698 0082 RESISTOR 464 1 125W F 0 100 CT4 1 8 T0 4640 F A1R80 0757 0280 RESISTOR 1K 1 125W F TC 0 100 4 1 8 0 1001 A1R81 0757 0442 RESISTOR 10K 1 125W F TC 0 100 4 1 8 0 1002 A1R82 0698 4
61. 360 1653 1 16 0360 1653 CONNECTOR SGL CONT 045 5 52 0360 1653 A1TP17 0360 1653 CONNECTOR SGL CONT PIN 045 1 5 52 0360 1653 1 18 0360 1653 CONNECTOR SGL CONT PIN 045 5 52 0360 1653 A1U1 1826 0147 1 7812 V RGLTR TO 220 MC7812CP A1U2 1826 1599 IC V RGLTR SuG 16 DIP P PKG 1826 1599 A1U3 1826 0122 IC 7805 V RGLTR TO 220 7805UC A1U4 1990 1190 DOUBLE COUPLER 1990 1190 A1U5 1990 1190 DOUBLE COUPLER 1990 1190 T C A1U6 1990 1190 DOUBLE COUPLER 1990 1190 141 1251 4822 CONN POST TYPE 100 PIN SPCG 3 CONT 1251 4822 D Vo A1X1 1252 1598 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96B30POOF50N9 A1X2 1252 1598 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96B30POOF50N9 ct 0340 1126 BARRIER BLOCK 18 TERM INTERNAL FEED THRU 0340 1126 04278 00601 5 1 BOX SHIELD 04278 00601 04278 00602 6 1 BOX SHIELD 04278 00602 04278 01204 6 1 HEAT SINK 04278 01204 0515 1007 2 4 SCREW MACH M3 X 0 5 16MM LG 0515 1007 0515 1550 0 7 SCREW MACHINE ASSEMBLY M3 X 0 5 8 16 0515 1550 0515 1551 1 4 SCREW MACHINE ASSEMBLY 5 X 0 5 10MM LG 0515 1551 1258 0141 8 1 JUMPER REMOVABLE FOR 0 025 IN SQ PINS 1258 0141 2110 0269 0 2 FUSEHOLDER CLIP TYPE 25D FUSE 2110 0269 4040 0748 3 1 EXTR PC BD BLK POLYC 062 IN BD THKNS 4040 0748 4040 0749 4 1 EXTR PC BD BRN POLYC 062 IN BD THKNS 4040 0749 4 A1 9 252 ak R49 78 8 E 6 BENE RTI SEP 613 0 G 94 0 44259 R Q Figure
62. 4 3 A1 Power Supply Component Locations 4 A1 10 Al POWER SUPPLY PRIMARY SECONDARY nF E a a 00 220 2 77 240 1 H b 1 c40 REO 2200 316 261K 15 M 19 R9 Le 31 6 309v 1 RI4 Re 1K 24 RIS co9 33 RII RI2 RI3 10K f 10K L RIG RIO 0 REFERENCE _ REGULATOR FREO L05 d v 12 1 30V 4 RIB 121 R20 IK 21 CRIO 48 20 48 POW FAI gt 26 gt OWER FAIL e a30 25 24 26 icm 0 047 GND SHIELD 59 ry GHD Figure 4 4 A1 Power Supply Schematic Diagrams 4 1 11 4 9 A2 MODULATOR SERVICE SHEET The A2 modulator board is covered by the exchange assembly program The part number of the A2 rebuilt exchange board is listed in Table 4 A2 1 A2 Modulator Replaceable Parts List Table 4 A2 1 A2 Modulator Replaceable Parts List Reference HP Part m 2 MODULATOR 28480 04284 66502 MODULATOR RE BUILT 28480 04284 69502 04284 66502 04284 69502 ee D lt lt 0 v D 4 A2 1 These troubleshooting aids provide a list of jumpers and test points The jumpers are listed in Table 4 A2 2 and the test points are listed in Table 4 A2 3 The test point locations are shown in Figure 4 A2 1 Table 4 A2 2 Jumper List Reference Des
63. 403 0285 Screw Pan Head Rubber Foot Cable Clamp w N 1400 1334 401 2140 4 2 S K quassy Table 3 4 Front Panel Assembly Components 1 2 WASIN INES SHREK HALAL DARL SN ee oe HEHEY ep aap A Ya gt ME EXER u eee Ff mi 2 4 GEE OME CAS XS m mM amp Capacitor 3 8 Table 3 4 Front Panel Assembly Components 2 2 Reference Part Number Description Designator 04279 01201 0535 0031 1400 0249 04278 66590 0515 1550 04278 66510 04278 40002 04278 40003 04278 08001 3050 0891 0535 0031 0515 0920 2190 0584 0535 0004 04279 66559 04278 40005 04278 25001 0535 0031 04278 61615 04278 66513 0515 1550 04278 00624 1400 1048 0515 0910 2190 0586 04278 61630 04278 61616 04278 61102 04278 61631 04278 00205 3150 0541 04278 40001 04284 61605 L co a OOP PO KL FSH HM HH HH HYD 04284 61604 04284 61603 04284 61602 0160 4808 1901 1250 04284 61613 3 9 Holder Nut Cable Tie KEY amp DISP Control Unit Screw Memory Card Board Bezel Knob Spring Waher F Nut Screw M3 Washer LK HLCL Nut
64. 50 Bias Current Interface Board Assembly Option 002 Figure 3 1 Assembly Identification 1 2 Assembly No Assembly Name Keyboard Assembly Memory Card Board Assembly DC AC Converter Board Assembly Keyboard Display Control Board Assembly LCD Module Assembly Figure 3 1 Assembly Identification 2 2 3 4 3 6 REPLACEABLE MECHANICAL PARTS LIST The replaceable mechanical parts are listed in Tables 3 1 to 3 9 The ordering information is given in SECTION 4 Table 3 1 Major Mechanical Parts 5081 8819 5062 3704 9041 8820 5062 3842 8160 0461 5021 5806 5021 5837 5062 3735 5041 8802 5021 8405 5041 8801 1460 1345 5062 3747 5001 0540 N N N N N 4 PO DB a as HP oa 3 5 62 9 me lt e lt ce 2 0D 7x lt O D Front Cap strap Handie Hear Cap Side Cover Gasket Hear Frame Corner Strut Top Cover Top Trim Front Frame Foot Tilt Stand Bottom Cover Side Trim Table 3 2 Top View Top cover removed Reference Part Number Qty Description Designator _ 1400 1048 04278 00633 04284 00625 0515 1550 Edge Saddle Top Plate over A1 board Top Plate over A2 thru A7 Screw Cable Clamp Cable Clamp 1400 1334 Opt001 1400 1334 wh oj 3 6 Table 3 3 Bottom View Bottom cover removed Reference Designator Part Number Qty Description 0515 1550 0
65. 561 0160 4832 0160 4822 0160 6561 0160 6561 0160 6561 0160 6561 0160 6561 0180 3217 2110 0742 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0421 0757 0280 0757 0416 0698 5444 0698 0082 0698 0082 0757 0280 1810 0273 0698 3155 5101 2831 5101 2831 1818 3918 1818 3918 1990 1179 1990 1179 1990 1179 1990 0602 1818 3801 1820 1208 1820 4888 1820 1208 SCANNER INTERFACE OPTION 301 CAPACITOR FXD 22UF 20 25VDC AL CAPACITOR FXD 1UF 20 50VDC CER CAPACITOR FXD 01 10 100VDC CER CAPACITOR FXD 1000PF 5 100VDC CER CAPACITOR FXD 1UF 20 50VDC CER ON CAPACITOR FXD 1UF 20 50VDC CER CAPACITOR FXD 1UF 20 50VDC CER CAPACITOR FXD 1UF 20 SOVDC CER CAPACITOR FXD 1UF 4 202 50VDC CER CAPACITOR FXD 470UF 20 6 3VDC AL FUSE 1 5 125V NTD VL RESISTOR 825 1 125W TC 0 100 RESISTOR 825 1 125 TC 0 100 F F RESISTOR 825 1 125W TC 0 100 F F RESISTOR 825 1 125W TC 0 100 RESISTOR 825 1 125W TC 0 100 RESISTOR 825 125W TC 0 100 RESISTOR 825 1 125W F TC 0 100 RESISTOR 825 1 125W TC 0 100 F F RESISTOR 825 1
66. 6TP7 Ground Line A D Converter output signal AGTP9 12 V DC A6TP10 12 V DC 11 45 V DC 12 Measurement Start Signal 4 A6 2 9 65 12 5 g 0 ash pss d Ogge 9 9 ji ott o aid 5 Ba E 35 ui TP2 GND TP2 0 o net 4 TP4 IT EOC 4 Service Sheets TPS TP6 TP7 TP8 9 AD GND INTEG 12 0 12 TP11 5 Figure 4 A6 1 A6 Vector Ratio Detector Test Point Locations 4 A6 3 NOTES 4 A6 4 4 14 A7 DIGITAL CONTROL SERVICE SHEET 4 14 1 CIRCUIT DESCRIPTION The A7 s Digital Control board MPU is A7U3 16 bit micro processor A7U6 707 708 A7U18 A7U19 and A7U20 are the programmed ROMs If a ROM or ROMs fail the check sum test during the power on self test the message ROM CHECK SUM ERROR will be displayed The ROM numbers and corresponding messages are listed in Table 4 A7 1 Table 4 A7 1 ROM Number ROM Number Reference Designator The A7 board determines which Options digital interface are installed in the HP 4284A by reading the 753 bit switch setting The bit switch settings are as follows 53 OPTION 109 STD INTERFACE STD lt 72 gt OPTION 002 BIAS CURRENT INTERFACE OPTION 202 STD 3 OPTION 201 OPTION 201 STD 3J9 OPTION 202 STD
67. 7 The auto barance bridge circuitly used in the 4284A ensures that the vector voltage across the feedback resistor will be an accurate proportional representation of the current through the device under test The basic principle of the auto balance bridge circuit is explained in terms of the two oscillator model illustrated in Figure 3 8 1 a ier Variabie Test Signal Fs Amplitude Source Phase Oscillator V Figure 3 8 Two Oscillators of The Auto Balance Bridge Currents ly and i can be balanced by controlling the output of the valiable amplitude phase oscillator as follows Firstly the null detector detects the difference iy between the current trough the DUT 1 x and the current through the range resistor I The unbalance current 14 which has the information required to balance the bridge is output to the feedback control circuit for the variable amplitude phase oscillator After the variable amplitude phase oscillator is adjusted the iy is equal to zero 0 So finally the i is equal to the i and the impedance of the DUT is calculated as follows EDUT ERR m EDUT RE d r Xx ZX Hr ERR 3 28 The actual auto balance bridge circuit is composed of the A2 modulator and A3 range resis tor boards The auto balance bridge consists of a null detector a vector generator and a feedback resistor range resistor The null detector consists of a current to voltage l V converter a pha
68. 748 BD YEL POLYC 062 IN BD THKNS 4040 0752 OWN o 4 A40 4 NOTES 4 Service Sheets 4 A40 5 AGOX1B Pin No amp 0 1 LGND 1 LGND LGHD 2 LGND LGND 3 LGND 5V 4 5V 45V 5 45V 5V 6 5 nc 7 nc nc 8 nc A14 A15 A12 M3 M0 Alt AS A9 A40J18 Pin No A40J1A SCANNER 1 7 LGND LGND EXT DCV f lon EOM 6 INDEX E p15 EXT_TRIG 5 CH_VALIO dr CH7 4 CH6 2 CHS 3 CH4 t CH3 2 CH2 1 cu1 1 CHO 00 01 3 JOTACK nc VPA VMA RESET E R W LGND Siy 00 LOS 7 KEY_LOCK_INT SCANNER_1NT B LGHO ao 22 02 32 coo 9202 6666666666666666 gt CN CO rcm Figure 4 40 1 A40 Scanner Interface Component Locations 4 A40 6 A40 SCANNER INTERFACE 1 OF 3 00 15 25 Di0 0 mo Bebo auis 281 2 Di 6 m 22 D 7 7 11 DEURI 198115015 m ba0 DID IT A 17 13 3 Munus geni E SaDa 14 is 14 7 7 001971504 1341575 di 17 Afi 1 tat From 11 w ut Ja 185 14214 i Weed 24 mat 8 8 5 15 AS 5 6 6 14 6 6 iv LT WA E m 0 T TIA 9 A 14 14 Pi 9 n m 9 ASI 15 T 2 16 SCANNER 27 m E m RESET M jx aM m CLKI6MHz HM 18 EXT DCV From To Rear 2 of 3 COMMON From 11 Fig
69. 86 0160 4835 0180 5600 0160 4801 0160 4835 0160 4835 0160 4830 0160 4850 0160 6812 0160 6812 0180 5600 0160 4834 02250104 050 0160 4822 0160 4833 0180 3583 0160 4833 0160 3454 0160 4832 0160 4835 0180 5597 0160 3456 0180 5600 0180 5600 0180 3600 0180 5587 0180 5587 0180 5587 0180 1075 0160 4808 CAC0O225U104M050A CACO2Z5U104M050A 0180 1075 0180 1075 0180 3664 0180 3603 0180 3603 0180 3603 0180 3603 1906 0313 VE48 Bem gt CD x lt e 42 1902 0969 1901 0050 1901 0050 DIODE ZNR 50 5 DO 35 PDz 4W 095 1902 0969 DIODE SWITCHING 80V 200MA 2 5 00 55 144150 DIODE SWITCHING 80V 200 2NS 00 35 1N4150 Ut wu SO 4 A1 5 ATCR6 1 A1CR8 ATCR9 A1CR10 A1CR11 12 ATCR15 14 ATCR15 1 16 1 17 ATCRT18 1 19 ATCR20 ATCR21 ATCR22 ATCR23 ATCR24 A1CR25 A1CR26 A1CR27 1 828 AICR29 A1CR30 ATCR31 ATCR32 ATCR335 ATCR34 A1CR35 A1CR36 ATCR37 1 838 ATCR59 A1CR40 ATCR41 ATCR42 1 43 ATCRAA ATCRA5 A1CR46 A1CR47 A1CR48 A1CR49 A1CR50 A1CR51 1 52 ATCR53 ATCR54 ATCR55 1051 A1DS2 1 1 1901 0050 1901 0050 1901 0050 1901 0050 1901 0050 1902 5150 1901 0050 1901 0050 1902 0945 1902 0945 1901 0050 1901 0050 1901 0050 1901 0050 1901 6050 1901 0050 1901 0050 1901 0050 1902 3150 1902 0953 1906 0317
70. 9 6 Q R528 6 G R541 6 L i Q R531 506 Q R542 O 508 512 BRS 0 8502 0 Q R2 6585045 699 i CR2 o C Q R501 6 oooooo HI 42 ooooooooQ Do ooooooo Figure 4 A2 1 A2 Modulator Test Points Locations 4 A2 3 NOTES 4 A2 4 4 10 A3 RANGE RESISTOR SERVICE SHEET The A3 board is covered by the exchange assembly program The part number of the A3 board for a standard HP 42844 is different from the part number of the A3 board for an Option 001 HP 4284 The part number of the rebuilt exchange board is listed in Table 4 A3 1 Table 4 A3 1 A3 Range Resistor Replaceable Parts List Reference HP Part C uoo M r A3 A ve CD TON lt 2 n 04284 66503 2 1 RANGE RESISTOR STANDARD 04284 66503 04284 69503 RANGE RESISTOR STANDARD RE BUILT 04284 69503 04284 66563 4 1 RANGE RESISTOR 091 04284 66563 04284 69565 RANGE RESISTOR 001 RE BUILT 04284 69565 4 A3 1 These troubleshooting aids provide a list of test points The A3 board test point locations for the standard 4284As are shown in Figure 4 A3 1 and the A3 board test point locations for Option 001 4284 5 are shown in Figure 4 A3 2 Table 4 A3 2 A3 Test Points l V Converter Output Ground Line Lc gain amplifier signal Voltage Signal proportional to the current trough the DUT
71. ATIO DETECTOR SERVICE SHEET The A6 vector ratio detector board is covered by the exchange assembly program The part number of an A6 rebuilt exchange board is listed in Table 4 6 1 Table 4 A6 1 6 Replaceable Parts List Reference HP Part Mfr Designator N mber D ty Description Code Mfr Part Number A6 04284 66506 VECTOR RATIO DETECTOR 28480 04284 66506 04284 69506 VECTOR RATIO DETECTOR RE BUILT 28480 04284 69506 These troubleshooting aids provide a list of jumpers and test points The jumpers are listed in Table 4 A6 2 and the test points are listed in Table 4 A6 3 The test point locations are shown in Figure 4 A6 1 Table 4 A6 2 A6 Jumper List Reference Description Designator A6J3 Phase Sensitive Detector Normal Position Input Selection Connects either EDUT or ERR signals to the phase sensitive detector 4 Co 40 UN lt O c CD 2 Test Position Connects GND to the input of the phase sensitive detector Normal Position Connects the phase detected signal to the A D converter A D Converter Input Selection Test Position Connects the GND to the input of the A D converter 4 A6 1 Table 4 A6 3 A6 Test Points List AGTP1 Crystal oscillator signal AGTP2 Ground Line AGTP3 Integration time signal 6 4 End of measurement signal A6TP5 Input signal to the phase detector Input signal to the converter A
72. CARD KBD INT CARD LDS 4 A11 5 4 18 A20 HP IB INTERFACE SERVICE SHEET 4 18 1 CIRCUIT DESCRIPTION The A20 HP IB Interface board handles HP IB interface functions HP IB Interface board controls the handshaking between the Microprocessor and external HP IB controlled equipment 4 18 2 TROUBLESHOOTING AIDS The test points are listed in Table 4 A20 1 Table 4 A20 1 A20 Test Points A20TP1 Ground reference for the 45V digital supply 2 2 5 V digital supply A20TP3 Lower Data Strobe Signal A20TP4 4 MHz is counted down from the A7 CLK 16M Hz 4 18 3 REPLACEABLE PARTS LISTS The replaceable parts for the A20 HP IB Interface board are listed in Table 4 A20 2 4 18 4 COMPONENT LOCATIONS The A20 HP IB Interface board component locations are shown in Figure 4 A20 1 4 18 5 SCHEMATIC DIAGRAMS The A20 HP IB Interface board schematic diagram is shown in Figure 4 A20 2 4 A20 1 ice TS lt D as m D cD r C Table 4 A20 2 A20 HP IB Interface Replaceable Parts List Reference HP Part C R Mfr 04284 66520 HP IB IF 04284 66520 0180 3590 CAPACITOR FXD 470UF 0180 3590 0160 6561 CAPACITOR FXD 0 1UF CACO225U104M050A 0160 6561 CAPACITOR FXD 0 10 CACO225U104M050A 0160 6561 CAPACITOR FXD 0 1UF CACO225U104M050A 0160 6561 CAPACITOR FXD CACO225U104M050A 0160 6561 CAPACITOR FXD 0 1 CACO225U104M050A 0160 6561 CAPACITOR FXD 0 1UF CACO225U1
73. Coil Assembly 04284 61601 A3J6 to A6J1 04284 61614 A3J8 to A6J2 04284 61606 A3J3 to A2J3 04284 61609 A3J3 to Rear Panel INT DC BIAS MONITOR 04284 61612 A5J201 to A6J7 5080 3196 OPTION 30 7120 0381 001 7120 0386 4006 SUO 1 2140 fU BIIAABS K quassy g 3 7 TOOLS AND FASTENERS The 4284A s mechanical components are secured using metric threaded faseners Many faseners in the 4284A may appear to be Phillips type but they are in fact Pozidrive type To avoid damaging them use only Pozidrive screwdrivers to remove or tighten Pozidrive type faseners 3 8 DISASSEMBLY Disassembly procedures are given in the following paragraphs The top cover removal pro cedure is given first and then the following paragraphs tell you how to remove each assem bly from the instrument 3 8 1 TOP COVER REMOVAL The following procedures are common for gaining access to any of the assemblies 1 Remove the two plastic instrument feet located in the upper corners of the rear panel 2 Fully loosen the top cover retaining screw located at the rear of the top cover 3 Slide the top cover towards the rear and lift it off 3 8 2 A1 ASSEMBLY REMOVAL 1 Loosen the two screws which secure the left hand side top shield plate Don t completely remove them NOTE There are two top shield plates To gain access to the A1 assembly remove the top shield plate which has the WARNING message printed on it CAPACITORS
74. DJ until the period T of the waveform is 12 5 us 0 5 MS as shown in Figure 2 5 Figure 2 4 shows A1R19 s location Graph 1 5 00 V div 10 0 V 5 00 us div 0 000 s PITTI em CT LLL LAE LLL LL Cursor X iv 16220 05 Cursor 0 Cursor 0 9 58 V 12 00 us 2 8 2 POWER SUPPLY OUTPUT VOLTAGE ADJUSTMENT This procedure adjusts the output voltage of the power supply EQUIPMENT Multimeter HP 3458A 2 Alligator Clips to 1 Dual Banana Plug Test Lead HP 11002A PROCEDURE 1 Set the Multimeter to the DC voltage measurement function 2 Connect the Test Leads to the multimeter 3 Connect multimeter s Lo input to A7TP2 GND and connect the Hi input to 1 Figure 2 7 shows the location of A7TP1 and 7 2 2 Alligator clips to 1 Dual Banana Plug Test Lead Lo input to A7T 2 HP 4284A Hi input to 1 MULTIMETER ATTP1 Figure 2 7 Power Supply Voltage Adjustment Location 2 12 4 Turn A1R52 V ADJ fully CCW Counter Clock Wise Figure 2 7 shows A1R52 s location 5 Adjust A1R52 until the multimeter reads 5 V 0 05 V wo gt Gis t jam Uo D 22 Lon ud 2 9 SENSE AMPLIFIER DC OFFSET ADJUSTMENT This adjustment minimize the DC offset voltage between the voltage channel sense amplifier and the current channel sense amplifier EQUIPMENT Multimeter HP 3458A Calibration R L Standard HP 16074A Extender Board For Analog Board H
75. EE 27 p M 1 BA 1 34 I in Dry 37 IROE gt Figure 4 A40 2 A40 Scanner Interface Schematic Diagram 2 of 3 Jl ZINDEX amp Jat i To EOM amp m Rear SCANNER INT ay m To All NOTES 1 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR 2 UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS uF INDUCTANCE IN MICROHENRIES uH 4 A40 9 A40 SCANNER INTERFACE 3 OF 3 BA 15 O 0 15 O From 1 of 5 RAM O EEPROM O BLDS ER W CLR UR FF O BUDS O 1 15 0 15 1 1 10 1 10 2 PC 9 1 VESIES S BA i UECI 6 PAG s 7 BAT 8 BA 3 9 9 5 10 BA 10 24 9 9 25 10 BA 10 24 14 BA 14 25 FE ie PS 1 1 10 2 2 9 3 BAG 4 EA 4 7 5 BA S 6 BAG 5 7 BAC 1 1 10 2 2 9 3 BA 3 4 4 7 S BAS 6 5 5 7 7 4 14 BDt141 18 S157 BD 15 19 12 BD 12 16 14 BD 14 18 15 BD 15 19 1 07 Figure 4 A40 2 A40 Scanner Interface Schematic Diagram 3 of 3 NOTES 1 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR 2 UNLESS O
76. Flat Head Shield on component side Screw Pan Head Shield on circuit side Large Screw Flat Head Heat Sink in 04284 00631 Insulator for 04284 01202 Screw for 04284 01202 Heat Sink Rubber on circuit side Shield on component side small Screw Pan Head Shield on circuit side small Screw Flat Head 04284 00610 0515 1550 04284 00611 0515 1005 1205 0696 1205 0318 04284 00607 0515 01550 04284 00608 0515 1006 04284 00601 04284 00606 1205 0691 Table 3 6 Shield Case And Heat Sink 3 of 3 A6 Board Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Heat Sink for U18 Heat Sink for U210 Shield on component side Screw Pan Head Shield on circuit side Screw Flat Head Shield Punched Plate Shield Plain Plate Heat sink for U8 U9 gt I v 7 and nr Co 2 D lt O std 001 std opt201 opt202 opt109 04284 61611 3101 2862 6960 0041 1250 0252 2190 0102 2950 0035 04284 61609 04279 61001 0515 1598 2190 0586 1400 1334 04278 00212 0515 1550 04278 00211 04278 61622 0515 1551 0535 0031 0515 1550 04278 00215 04278 61622 0515 1551 0535 0051 0515 1550 04284 00211 04278 61621 2190 0577 0515 1550 04278 00212 0515 1550 NN NJ N N J a 3 a mo I Table 3 7 Rear Panel Components Cable Assembly Power Swit
77. GROUNDING SYSTEM gt 5 ml SS t lt oo 2 D lt 3 3 RECOMMENDED TEST EQUIPMENT The required troubleshooting test equipment are listed in Table 1 1 Section 1 The table lists the type of instruments required their critical specifications and the model numbers of the equipment recommended If the recommended models are not available equipment which meets or exceeds all of the critical specifications may be substituted 3 4 AFTER SERVICE PRODUCT SAFETY CHECKS WHENEVER IT APPEARS LIKELY THAT PROTECTIVE SAFETY PROVISIONS HAVE BEEN IMPAIRED THE APPARATUS SHALL BE MARKED AS INOPERATIVE AND SHOULD BE SECURED AGAINST ANY UNINTENDED OPERATION THE PROTECTION PROVISIONS WILL HAVE LIKELY BEEN COMPROMISED IF FOR EXAMPLE INSTRUMENT SHOWS VISIBLE DAMAGE THE INSTRUMENT FAILS TO PERFORM THE INTENDED MEASUREMENT THE UNIT HAS UNDERGONE PROLONGED STORAGE UNDER UNFAVORABLE CONDITIONS THE INSTRUMENT WAS SEVERELY STRESSED IN TRANSPORT Perform the following five checks to verify the 4284A s safety these checks may also be used for safety checks after troubleshooting and repair ie Visually inspect the interior of the instrument for any signs of abnormal internally generated heat such as discolored printed circuit boards and components damaged insulation or evidence of arcing Determine the cause and repair Use an ohmmeter which can accurately measure 0 5
78. INE DRVR OCTL IC DRVR TTL LS LINE DRVR OCTL IC SCHMITT TRIG TTL LS INV HEX 1 INP IC INV TTL LS HEX 1 INP CMOS 6321P CMOS 6321P Indicates factory selected value 4 A31 2 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 0655 SNT4LS5A41N SN74LS541N SN74LS14N SN74LSO4N 1820 4888 1820 4888 Table 4 A31 2 A31 Handler Interface Replaceable Parts List 2 2 Reference HP Part D ur 1820 2711 2 IC DRVR TTL LS LINE DRVR OCTL SN74LS541N 1820 2075 4 IC TRANSCEIVER TTL LS BUS OCTL SN74LSOON 1820 2075 4 IC TRANSCEIVER TTL LS BUS OCTL SN74LSOON 1820 1200 5 TTL LS HEX SN74LSO5N 8159 0005 8159 0005 8159 0005 8159 0005 RESISTOR ZERO OHMS 22 AWG LEAD DIA RESISTOR ZERO OHMS 22 AWG LEAD DIA RESISTOR ZERO OHMS 22 AWG LEAD DIA RESISTOR ZERO OHMS 22 AWG LEAD DIA 8159 0005 8159 0005 8159 0005 8159 0005 1252 1589 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96B50POOF50N9 4040 0749 4040 0751 4040 0749 4040 0751 EXTR PC BD POLYC 062 BD THKNS EXTR PC BD ORN POLYC 062 BD THNKS Indicates factory selected value 4 A31 3 A C D lt D oa D adm e 2 6666 666 6666606 A31X1A SEM A31J18 2 g2 Q
79. Isolation Digital Group Trouble tco rarior Source Group Trouble Isolation Vector Ratio Detector frouble Isolation Transducer Trouble Isolation Exit this program Select using the softkeys Figure 3 15 Main Menu 8 Use the following information to select the softkeys and perform the trouble isolation procedures according to messages on the controller s display TU eo gt 2 0 lt 3 lt C m D wm lt O 3 41 Table 3 14 Main Menu Softkeys Used to check all groups and to isolate the faulty board The checking order is shown in Figure 3 13 Used to check the power supply group and to isolate the faulty board in the power supply group The items checked the power supply group are as follows Cooling fan Output dc voltages on the A1 board Neon lump on the A13 board Fuses on the A1 board VOLTAGE SELECTOR switch and Fuse on the rear panel Digital Used to check the digital group A7 A20 to A50 and to isolate the faulty board in the digital group The items checked in the digital group are as follows e Power on self test e Each performance test for each digital interface Source Used to check the source group A4 A5 and to isolate the faulty board in the source group The items checked in the source group are as follows e Test frequency test Signal level Level monitor test e DC bias level test Used to che
80. MANUAL CHANGES Agilent 4284A MANUAL IDENTIFICATION Precision LCR Meter Service Manual This supplement contains information for correcting manual errors and for adapting the manual to newer instruments that contains improvements or modifications not documented in the existing manual To use this supplement 1 Make all ERRATA corrections 2 Make all appropriate serial number related changes listed below SERIAL PREFIX OR NUMBER MAKE MANUAL SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES CHANGES 04284 60001 Inner Frarne 1818 5719 IC CMOS 64K EEPROM 1818 5719 IC CMOS 64K EEPROM 1818 5719 IC CMOS 64K EEPROM 1818 5719 IC CMOS 64K EEPROM 0180 4403 CAPACITOR FXD 470UF Newltem Change D Delete A Add NOTE Manual change supplement are revised as often as necessary to keep manuals as current and accurate as possible Agilent Technologies recommends that you periodically request the latest edition of this supplement Free copies are available from all Agilent Technologies offices When requesting copies quote the manual identification information from your supplement or the model number and print date from the title page of the manual Date Div July 2000 33 E Page 1 of 1 Agilent Technologies PRINTED IN JAPAN MANUAL CHANGES HP 4284A MANUAL IDENTIFICATION Precision LCR Meter Model Number HP 4284A Date Printed January 1989 Part Number 04284 90100 This supplement contains information for co
81. O ISOLATOR LED IC GATE 20 MAX 5082 4561 1820 2711 5 SN74LS541N IC DRVR TTL LS LINE DRVR OCTL Indicates factory selected value 4 A30 2 Table 3 1 A30 Handler Interface Replaceable Parts List Reference HP Part Mfr 1820 2711 1820 2711 1820 1197 1820 1199 1820 4888 1820 4888 1820 2711 1820 2075 1820 2075 1820 1200 1820 1112 8159 0005 8159 0005 8159 0005 1252 1589 4040 0749 4040 0751 IC DRVR TTL LS LINE DRVR OCTL IC DRVR TTL LS LINE DRVR OCTL SN74LS541N SN74LS541N IC GATE TTL LS NAND QUAD 2 INP IC INV TTL LS HEX 1 INP CMOS 6321P CMOS 6321P DRVR TTL LS LINE DRVR OCTL SN74LSOON SN74LSOA4N 1820 4888 1820 4888 SN 4LS541N TRANSCEIVER LS BUS OCTL IC TRANSCEIVER LS BUS OCTL IC INV TTL LS HEX FF TTL LS D TYPE POS EDGE TRIG SN74LS245N SN74LS245N 5 741505 SN74LS74AN RESISTOR ZERO OHMS 22 AWG LEAD DIA RESISTOR Z2ERO OHMS 22 AWG LEAD DIA RESISTOR ZERO OHMS 22 AWG LEAD DIA 8159 0005 8159 0005 8159 0005 CONN POST TYPE 2 54 PIN SPCG 96 CONT PI96BSO0POOF5ON9 EXTR PC BD BRN POLYC 062 BD THKNS EXTR PC BD ORN POLYC 062 BD THNKS 4040 0749 4040 0751 d Cc D lt lt e 4 e D pan Indicates factory selected value 4 A30 3 9 800 G LZY IA O BA G 6 908 6 014 s amp LM Q SZY o0 6 A30x18 Pin No A30x1A A30J18
82. ON THE A1 BOARD REMAIN CHARGED WITH HAZARDOUS VOLT AGES FOR A PERIOD OF TIME AFTER THE INSTRUMENT IS TURNED OFF OR AFTER THE POWER CABLE 15 DISCONNECTED ALLOW AT LEAST ONE MINUTE FOR THE CAPACITORS TO DISCHARGE AFTER THE INSTRUMENT 15 TURNED OFF OR THE POWER CABLE IS DISCONNECTED 2 Slide the top shield plate towards the front and lift it off 3 Lift the black and the brown board extractors at the top corners of the A1 assembly 4 Disconnect the cable that connects between the A1 board assembly and the rear panel lt gt o m s oV O tf 2 Cn mx lt 0 D 3 8 3 REMOVING THE A2 A3 A4 A5 A6 A7 A20 A30 A31 A40 OR A50 ASSEMBLIES 1 Loosen the five screws that secure the right hand side plate Don t remove the screws completely NOTE There are two top shield plates In order to access the A2 4 A5 A7 A20 A30 A31 40 or A50 assemblies remove the top shield plate on which the WARNING message label is NOT printed 2 Slide the top shield plate towards the front and lift it off 3 Lift the extractors at top corners of the board assembly that you want to remove 3 8 4 FRONT PANEL DISASSEMBLY This paragraph describes how to remove the front panel assembly from the 4284 In order to remove the A9 A10 A13 A90 or A91 assembly which are shown in Figure 3 2 first dis assemble the front panel assembly 1 2 Remove the top
83. OR CAPACITOR CAPACITOR FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD FXD 015UF 20 250VAC RMS 470UF 20 250VDC AL 470UF 20 250VDC AL 470UF 20 250VDC AL 8700 20 250VDC AL 015UF 20 250VAC RMS 22000 20 35VDC AL 19 10 50VDC CER 33UF 20 25VDC AL 100PF 5 100VDC CER 1UF 10 50VDC CER 10 SOVDC CER 2200PF 10 100VDC CER 2200PF 10 100VDC CER 2 2UF 10 250VDC 2 2UF 10 250VDC 53UF 20 25VDC AL 0479 10 100VDC CER TlUF 20 50VDC CER 1000PF 5 100VDC CER 022UF 10 100VDC CER 10UF 207 SOVDC AL 022UF 10 100VDC CER 220PF 10 1KVDC CER 010 10 100VDC CER TUF 10 50VDC CER 47UF 20 25VDC AL 1000PF 10 1KVDC CER 33UF 20 25VDC AL 3554 20 25VDC AL 53UF 207 25VDC AL 10000 20 50VDC AL 10000 20 50VDC AL 100042 20 50VDC AL 2200 UF 16VDC AL 470PF 5 100VDC CER TUF 20 50VDC CER 10 20 50VDC CER 2200 UF 16VDC AL 2200 UF 16VDC AL 3500UF 20 10VDC AL CAPACITOR FXD CAPACITOR FXD CAPACITOR FXD BRIDGE 600V DIODE FW BRDG 10UF 20 1QUF 20 10UF 20 10UF 20 400V 1A 100VDC AL 100VDC AL 100 0 AL 100VDC AL 0160 5969 0180 3253 0180 3253 0180 3253 0180 3253 0160 3969 0180 35
84. P PN 04278 66598 2 Alligator Clips to 1 Dual Banana Plug Test Lead HP 11002A PROCEDURE T 2 Connect OPEN to the UNKNOWN terminals Set the multimeter to DC voltage measurements function Connect the Test Lead to the multimeter input Hold up the A3 board using the extender board Connect the multimeter Lo input to 4 ERR Then connect the multimeter Hi input to 6 EDUT Figure 2 9 shows the location of TP4 and TP6 LO Input to Hi Input to 6 2 Alligator clips to 1 Dual Banana Plug Test Lead A3 Board MULTIMETER S BBB OSG gt eu C pedi gt Figure 2 8 Sense Amplifier DC Offset Adjustment Setup R353 TPG SENSE AMP VOS ADJ EDUT A3 Board 4 ERR BOARD Figure 2 9 Sense Amplifier DC Offset Adjustment Location 6 Adjust A3R353 SENSE VOS ADJ until the multimeter reads 0 10 Figure 2 9 shows the location of A3R353 2 15 2 10 DC BIAS LEVEL ADJUSTMENT OPTION 001 ONLY This adjustment updates the EEPROM Calibration Data to set the DC bias voltage The adjustment program is necessary to perform this adjustment EQUIPMENT Computer HP 9826A Multimeter HP 3458A HP IB Cable PU HP 10833A Interface Box HP PN 04284 65007 BNC m to BNC m Cable 30 cm HP PN 8120 1838 BNC f to Dual Banana Plug Adapter HP PN 1251 2277 PROCEDURE 1 Disp
85. T WDL TRG INT AGND AGND AGND one KEY_LOCK_INT INT_FROM_STO_IF AGRO 5 _1 OPT 8D INT AGND AGND AGND Done LGND CLK2MHz ACs1 ACs1 ACs1 n CLK15MHz CLKBMHz ACs3 ACs3 ACs3 LGKD LGNO ACsS ACsS ACs5 one ACs1 50 57 57 ACs7 ne ACs3 ACS2 ANLDS ANLDS ANLDS nc ACsS 5 amp ANA3 ANA3 onc ACs7 ACS6 ANAT ne ANLDS ANDS AND AND ne LGND L GND ANDA ANDA ANDA ne LGND ANA3 ANDO ANDO ANDO nc 014 ANA ANA2 106 106 1D6 ne D12 AND AND7 104 104 1D4 ne D10 AND4 ANOS 102 102 i ne D8 D9 08 09 AND2 AND3 100 100 100 100 i ne D D7 06 D7 ANDO ANO 1 nc _ nc nc nc nc D4 05 D4 05 LGND LGND RESET RESET RESET RESET RESET ne D2 D3 02 03 1D6 107 nc nc nc ne 20 01 00 104 105 AGND AGND Em DTACK FAIL DTACK FAIL 102 103 AGND AGND AGNO nc AGND nc 106 101 AGND NPA VPA VMA RESET E RESET E LGND R W LGND 05 00 LDS e SCANNER INE 106 OPT BD INT CLK16HHZ LGND CLK16MHz LGND 5V MEM CARD CARD KEY DSP aA oL gt gt mm em nc A9 A12 A11 07 05 03 nc 02 LGND LGND 544 20V A2 OT G zor 06 3 5 15 nc nc nc A10 5V MEM CARD D LGND CLK16MHz MEM
86. THERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS uF INDUCTANCE IN MICROHENRIES uH 4 A40 11 APPENDIX A MANUAL CHANGES A 1 INTRODUCTION This appendix contains the information required to adapt this manual to earlier versions or configurations of the HP 4284A than the current printing date of this manual The tion in this manual applies directly to HP 4284A Precision LCR Meters whose serial number prefix is listed on the title page of this manual A 2 MANUAL CHANGES To adapt this manual to your HP 42844 refer to Tables A and B and make all of the manual changes listed opposite your instrument s serial number and ROM based firm ware s version Instruments manufactured after the printing of this manual may be different than those documented in this manual Later instrument versions will be documented in a manual changes supplement that will accompany the manual shipped with that instrument If your instrument serial number is not listed on the title page of this manual or in Table A it may be documented in a yellow MANUAL CHANGES supplement Refer to the description of the command in SECTION 8 COMMAND REFERENCE OPERATION MANUAL for confirmation of the ROM based firmware s version For addi tional information on ser al number coverage refer to SECTION 1 Table A Changes by Serial Number Serial Prefix Make Manual Changes or Number There are no earlier configurati
87. TOR CORP CORNING GLASS WORKS WILMINGTON HEWLETT PACKARD CO CORPORATE HQ RCA CORP SOLID STATE DIV INTERSIL INC SPRAGUE ELECTRIC CO INDUSTRIAL CORP J F 0 ELECTRONICS CORP TRU INC PHILADELPHIA DIV LITTELFUSE INC 3n CO UNITRODE CORP DALE ELECTRONICS INC SEALECTRO CORP 4 4 Address Zip Code VIEW TOKYO SUNNYVALE EL PASO DALLAS DES PLAINES SANTA CLARA MOUNTAIN VIEW NORWALK GARLAND BERNE CONCORD TUSTIN RALEIGH WEST PALM BEACH WAKEFIELD NORWOOD SANTA CLARA SANTA CLARA WILMINGTON PALO ALTO SOMERVILLE CUPERTINO NORTH ADANS FULLERTON BROOKLYN PHILADELPHIA DES PLAINES ST PAUL LEXINGTON EL PASO MAMARONECK 4 5 3 ORDERING INFORMATION When ordering a replacement part listed in the Replaceable Parts List specify the Hewlett Packard part number and the quantity required and send the order to the nearest Hewlett Packard office When ordering a part not listed on the Replaceable Parts List state the full instrument model number and serial number describe the function of the part and give the quantity required Send the order to the nearest Hewlett Packard office 4 5 4 DIRECT MAILING ORDERING Within the United States Hewlett Packard supplies parts through a direct mail order system The advantages of using this system are Direct order and shipment from the HP Parts Center in Mountain View California No maximum or minimum on any m
88. W 0 100 F F C4 1 8 T0 196R F 4 1 8 196R F C4 1 8 TO 196R F C4 1 8 TO0 196R F RESISTOR 196 1 125W TC 0 100 RESISTOR 196 1 125W TC 0 100 NNNNN 0698 3440 0698 3440 0698 3440 0698 3440 0698 3440 RESISTOR 196 125W TC 0 100 RESISTOR 196 125 0 100 F C4 1 8 T0 196R F RESISTOR 196 125W F 0 100 F F C4 1 8 T0 196R C4 1 8 T0 196R C4 1 8 T0 196R C4 1 8 T0 196R RESISTOR 196 125 0 100 RESISTOR 196 125W TC 0 100 0698 3440 0698 3440 0698 3440 0698 3440 0757 0280 RESISTOR 196 125W TC 0 100 RESISTOR 196 1 125W F TC 0 100 RESISTOR 196 1 125W F TC 0 100 RESISTOR 196 1 125W F TC 0 100 RESISTOR 1 1 125W F TC 0 100 C4 1 8 T0 196R F C4 1 8 T0 196R F C4 1 8 T0 196R F C4 1 8 T0 1968 C4 1 8 TO 1001 F NNNNN NNNNN 1810 0279 NETWORK RES 10 SIP 4 7K OHM X 9 CSC10A01 472G MSP 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 1199 1990 0655 1820 2711 1820 2711 1820 1416 1820 1199 1820 4888 1820 4888 JN a CO oOo ooo ul uil OPTO ISOLATOR OPTO ISOLATOR ISOLATOR OPTO ISOLATOR OPTO ISOLATOR OPTO ISOLATOR ISOLATOR ISOLATOR ISOLATOR 1501 1501 OPTO ISOLATOR OPTO ISOLATOR OPTO ISOLATOR IC DRVR TTL LS L
89. ail order there is a minimum order amount for parts ordered through local HP offices when the order requires billing and invoicing Prepaid shipping there is a small handling charge for each order No invoices a check or money order must accompany the order Mail order forms and specific ordering information are available through your local HP office Addresses and telephone numbers are given at the back of this manual 4 6 COMPONENT LOCATIONS The component locations provide you with component position information 4 7 SCHEMATIC DIAGRAMS The schematic diagram for each board provides you with circuit information Figure 4 2 shows the symbols used in the schematic diagrams ES Cc D lt 0 D e D e t 4 5 DANGEROUS VOLTAGE EXCEEDS 1000 VOLTS Knob control Serewdriver adjustment Circuit assembly boarderline Asterisk denotes a factory selected value Value shown is typical part may be omitted Bead inductance Cireuit board pattern inductance Heavy line indicates main signal path Heavy dashed line indicates main feedback path Wiper moves towards CW with clockwise rotation of control as viewed from shaft or knob Numbered test point Measurement aid provided Denotes wire color code Code used is the same as the resistor eolor code e g 9 4 7 denotes white yellow violet Encloses front panel designations Shielded area Indicates direct conducting connection to e
90. ard Interface The A10 memory card interface board is the memory card socket board A20 HP IB Interface The A20 HP IB interface board controls the handshake between the micropocessor and external HP IB controller A30 A31 Handler Interface Option 201 202 The 1 handler interface board interfaces between the HP 4284A and the external handler A40 Scanner Interface Option 301 The A40 scanner interface board interfaces between the HP 4284A and the external scanner The A40 board has two EEPROMs for storing 128 sets of OPEN SHORT LOAD correction data at each three frequencies 50 Bias Current Interface Option 002 The A50 bias current interface board is used to control the HP 428414 3 24 3 9 3 SOURCE BLOCK SECTION The source block section is composed of the A4 high power amplifier dc bias and the 5 signal source boards The A4 board is only installed for the Option 001 The 5 signal source board generates the AC voltage 5 mVrms to 1 Vrms and also gener ates 1 5V 2 0V DC voltages The 5 signal source consists of three crystal oscillators the programmed N divider the quasi sine wave generator the attenuator the D A Converter the dc bias voltages 1 5 V 2 0 V the output amplifier and the source resistor Refer to Figure 3 5 uk TP2 TP6 X tal OSC Quasi Sine Wave Generator FCLK OUTPUT DC BIAS Figure 3 5 Signal Source A5 Simplified Block Diag
91. arth Indicates conducting connection to chassis or frame Indicates circuit common connection Figure 4 2 Schematic Diagram Symbols 4 8 A1 POWER SUPPIY SERVICE SHEET 4 8 1 CIRCUIT DESCRIPTION The A1 Power Supply board provides 45 V 48 V 12 V 15 V 21 V and 48 V to the A11 Mother Board The A1 Power Supply board is divided into two sections at transformer A1T3 the primary circuit and the secondary circuit The primary circuit consists the following 2 Primary rectifier Turn on surge current limiter Slow start circuit Supply voltage controller Switching circuit Shutdown circuit The secondary circuit consists the following 1 2 secondary rectifier for each output voltage Overvoltage detector An explanation for each circuit follows Primary Rectifier The primary rectifier composed of A1CR1 A1C2 A1C3 A1C4 and 1 5 rectifies the AC source voltage to supply the unregulated DC voltages A1CR1 acts as a full wave rectifier when the line voltage selector is set to 220 240 V and as a voltage doubler when the line voltage selector is set to 100 120 V Surge Current Limiter The surge current limiter composed of A1R1 A1K1 and A1FT1 limits the surge current gt gt lt O qu E C when the instrument is turned on A1K1 is activated by the slow start circuit about half a second after the power switch is turned on to by p
92. ass A1R1 Surge current limit resistor which protects the primary rectifier from current surges at power up If A1K1 does not activate the heat produced by A1R1 will cause thermal fuse A1FT1 to open up 4 A1 1 Slow Start Circuit The slow start circuit composed of A1Q1 A1Q2 A1Q3 A1Q9 and 1010 lengthens the rise time of the supply voltage by limiting the maximum switching pulse width at power up When the voltage from the primary rectifier becomes greater than about 240 V the slow start circuit is enabled Supply Voltage Controller A1U2 supply voltage controller controls the switching circuit The switching duty cycle is adjusted by A1R19 FREQ ADJ Switching Circuit The switching circuit used to convert the DC primary voltage to a 40 kHz AC voltage con sists of A1Q11 and A1Q12 The duty cycle is the parameter varied to regulate the output voltage and it is controlled by A1U2 supply voltage controller by comparing the 5 V Vref reference voltage to the 9 V feedback voltage produced by A1CR21 A1CR22 114 and A1C25 Shutdown Circuit The shutdown circuit consisting of A1Q6 A1Q7 A1CR18 and A1CR19 stops both the A1U 2 s oscillator and the switching circuit if one of the following situations occur 1 The FAN STOP signal form A1U6 is received by the shutdown circuit 2 The over voltage signal from A1U5 is received by the shutdown circuit Secondary Rectifier The secondary rectifier recti
93. below LED Pattern 1 0 OFF L eft 1 Lk tA E 2 s 9 xb 2i d 2 0o M OUO OOO OO x x Q3 4 J Right 8 Task Clears memory card read write flip flop Turns off memory card power supply LED test LED test LED test LED test LED test LED test LED test LED test LED test Initializes LCD controller Initializes timer on A7 Initializes timer on A90 Initializes A90 Check the bit switch A7S3 Initializes timer on the A D converter Initializes PIA chip on A30 or A31 Initializes PIA chip on A40 Clears all interrupt signal RAM read write test Clears RAM Displays Copyright message ROM check sum test EEPROM check sum test EEPROM check sum test for A40 Option 301 only Starts the measurement 3 36 2 Self test selected by softkeys Softkey selected self tests are shown below and each self test is described in SEC TION 5 of the operation manual Memory card R W test LED display test LCD display test Handler I F test Scanner I F EEPROM R W test
94. ble 4 A4 2 The A4 high power amplifier DC bias board test point locations are shown in Figure 4 A4 1 Table 4 A4 2 A4 Test Points List AA4TP1 AC Voltage signal from the A5 board A4TP2 8 V DC A4TP3 Ground Line A4TP4 Output signal to Hcur Terminal AATPS Output signal from the high voltage amplifier AATPG AC signal overload signal Ground Line AATP8 50 V DC 4 9 50 V DC AATP10 5 V DC AATP1 1 8 V DC AATP12 Buffer output signal Hi PW mode AATP13 Output signal from DAC 4 14 5 V the sign depends the polarity of the DC bias setting 7 A4TP15 AC output signal from preamplifier A4TP16 DC voltage signal Full Scale 5 V AATP17 Ground Line 4 4 2 4 Service Sheets _ TP7 8 9 TPl TP2 12 5 6 15 CND 50 50 VIN 8 GND VOUT HF OVLD TP10 ju 5V 11 E Tm 8V ZB DAC d os AE F om er HIS SU E E TP14 VREF Figure 4 A4 1 A4 High Power Amplifier DC Bias Test Points Locations 4 4 3 NOTES 4 A4 4 4 12 A5 SIGNAL SOURCE SERVICE SHEET The 5 signal source board is covered by the exchange assembly program The part num ber of an A5 rebuilt exchange board is listed in Table 4 A5 1 Table 4 A5 1 A5 Replaceable Parts List Reference HP Part e Mfr 04284 66505 04284 69505 A5 5 28480 04284 66505 P8480 04284 69505 SIGNAL SOURCE SIGNAL SOURCE RE
95. ch included in PN 04284 61611 std 301 Plug Hole Connector BNC Washer Nut Cable Assembly Fan Assembly Screw Washer Cable Clamp 002 Blank Plate Screw I F Plate Flat Cable Assembly Screw for Connector Nut Screw for Plate I F plate Flat Cable Assembly Screw for Connector Nut Screw for Plate HP IB Plate Flat Cable Assembly Washer Screw Blank Plate Screw 04278 00212 0515 1550 04278 00216 04278 61632 0515 1551 0535 0031 0515 1550 04284 00210 04284 61610 0515 1551 0535 0031 0515 1550 7120 0382 04279 04001 0515 1550 1250 0083 0360 1190 2190 0016 2950 0001 04278 61617 04278 61619 2110 0565 2110 0305 2110 0581 2110 0566 2110 0569 04278 00654 1400 1534 0515 1550 04278 61002 0515 0910 2190 0586 04284 68001 MN MN eA A gt oe o l3 l3 pl PAD A 54 5 Blank Panel Screw I F Plate Flat Cable Assembly Screw for Connector Nut Screw for Plate I F Plate Falt Cable Assembly Screw for Connector Nut Screw for Plate Label Fan Cover Screw Connector BNC Cable Assembly Cable Assembly Cap Fuse for 220 240V Fuse for 100 120V Fuse Holder Table 3 8 Coaxial Cable Assembly 04284 61608 5 200 to A64J1 Opt 001 04284 61602 A4J2 to Hcur i Magnet Coil Assembly 04284 61603 A3J7 to Hpot Magnet Coil Assembly 04284 61604 A3J4 to Lpot Magnet Coil Assembly _ 04284 61605 A3J5 to Lcur Magnet
96. ck the A6 Vector Ratio Detector VRD The items checked in the VRD are as follows e Hpot Buffer e Converter e Prosess amplifier and phase sensitive detector Used to check the transducer TRD and isolate the faulty board in the TRD A2 A3 The items checked in the TRD are as follows 90 phase shifter on A2 UNBAL detector on A2 Hpot buffer on A3 s MODEM Normalizer on A2 Lcur gain amplifier on A3 Range resistor sense amplifier on l V converter on Bias Current Isolation Active aaston on A3 Used to exit this program 3 42 NOTE You can only select the TRD softkey after you have checked the other groups C gt o un g fp c gt CAs lt 3 43 NOTES 3 44 SECTION 4 SERVICE SHEETS 4 1 INTRODUCTION This section contains a service sheet for each of the HP 4284A s PC board assemblies Each service sheet is organized into six parts Circuit Description Troubleshooting Aids Board Connector Pin Assignments Replaceable Parts List Component Location Drawing and Schematic Diagram 4 2 CIRCUIT DESCRIPTION The circuit description gives a detailed functional circuit description of each board 4 3 TROUBLESHOOTING AIDS The troubleshooting aids provide information to help you troubleshoot problems in the HP 4284A Usually the troubleshooting aids consists of a list of jumpers a list of test points an
97. cription Designator O integrator Output Normal Position Selection Connects the 0 integrator output signal to the modulator Test Position Connects 8 V DC to the modulator 90 Integrator Output Normal Position Selection Connects the 90 integrator output signal to the modulator Test Position Connects 8 V DC to the modulator A2J201 Zero Offset Adjustments These jumpers are used for A2J202 Jumpers Adjustments A2J203 Refer to SECTION 2 A2J301 A2J302 A2J303 Table 4 A2 3 A2 Test Points GND Ground Line UNBAL UNBALANCE Detector Signal X30 signal multiplied l V converter output signal by 30 GND Ground Line NULL Null Detector Signal 8 8 V DC 8 8 V DC ODEG 0 reference signal 90DEG 90 reference signal 12 12 V DC GND Ground Line MOD Modulator Output Signal GND Ground Line NULLOUT Normalized Output Signal from the sum ming amplifier 4 A2 2 4 Service Sheets 10 TP2 5 TP6 7 TP8 TP9 12 2 14 5 UNBAL X30 GND NULL 8 8 ODEG 90DEG MOD GND NULLOUT 05222 J i 9582158 rs Q4R21 8 5 042320083326 O O G R402 6 K EEE EERE c WE Ims Q C126 6 Q R132 6 Q CI21 6 G R156 0 RIGI 0105 EDD MD AD 2 9 58 _ cis ME NT eo 4555525 59 895555959 5 R2948 0000009 9 4530 Q R52
98. d troubleshooting information The jumper list shows the strapping configuration for each jumper The test point list gives a description of the signal at each test point The trouble shooting information includes waveforms for troubleshooting the board and the measure ment setup for viewing the waveform is listed next to the waveform figure refer to Figure 4 1 Setting up the oscilloscope 1 Set the oscilloscope inputs to DC coupled 1 MQ 2 settings using a 1 1 probe for channel and B and the time base setting are displayed with the waveform refer to Figure 4 1 When a 10 1 divider probe is used the channel A and B settings must be multiplied by 10 CHANNEL A CHANNEL B Time Base Vertical Setting Vertical Setting Setting el Lg 5 08 V div 5 00 208 lt T gt lt lt D C CHANNEL A Waveform CHANNEL B Waveform Figure 4 1 Oscilloscope Setup 4 4 BOARD CONNECTOR PIN ASSIGNMENT The pin assignments for each board are provided with the component locations using the names listed in Table 4 1 Table 4 1 Signal Name Used for Pin Assignments AD CLK A 1 to A20 ACSO to ACS7 ANAI to ANDO to AND7 ANLDS ANR W AS Alto A20 BIAS CARD CARD R W DO to D15 DTAC EOC F HALT HANDLER HDL TRG INT ID0 to ID7 INT FRM STD IF INT TO STD IF KBD INT KEY DSP CTL KEY
99. defective without ROMs installed and the ROMs are not defective order a ROMless A7 board Install the ROMs from the defective A7 board on the replacement A7 board If both the A7 board and the ROMs are defective order a ROMIess A7 board and the four ROMs The replaceable parts for the A7 board are listed in Table 4 A7 2 The part number for a rebuilt exchange board is listed on the first page of the A7 board s replaceable parts list 4 14 4 COMPONENT LOCATIONS The component locations for the A7 Digital Control Board are shown in Figure 4 A7 1 4 14 5 SCHEMATIC DIAGRAMS The A7 Digital control Board s schematic diagram is not supplied since of the ROMIess A7 board has been set up on the exchange assembly program 4 7 2 Table 4 A7 2 A7 Digital Control Replaceable Parts Lists Reference HP Part C gres A7 7 1 DIGITAL CONTROL W O ROM DIGITAL CONTROL W O ROM RE BUILT 04284 66657 04284 69657 ROM Version 1 10 04284 86501 0 ROMs version 1 10 Set 04284 86301 04284 85501 04284 85305 04284 85305 04284 85302 04284 85304 04284 85306 ROM OK BITO 04284 85301 ROM 20K BITO 04284 85303 ROM 40K BITO 04284 85305 ROM OK BIT8 04284 85302 ROM 20K 8 04284 85304 ROM 40K BIT8 04284 85206 UN wed ond ott gt d C D lt e D 1 4 7 3 a VU p Eo et E E lt 2208
100. e sign depends on the polarity of the dc bias set ting The Vref output is applied to the D A converter DAC The output from the DAC is attenuated by the attenuator and the attenuated dc bias signal is added to the ac signal from the A5 board The added signal is amplified x 10 and is output to the Hcur Terminal In the case of the 4284A with the Option 001 you can select the high power mode ON OFF which swiches two relays 3 26 3 9 4 TRANSDUCER BLOCK SECTION The 4284A employees the current to votlage coverter as a ammeter See Figure 3 7 The current through the DUT is detected by a current to voltage I V converter using a resis tor Range resistor RR in the feedback circuit The I V converter generates a current flow through the range resistor equal to the current through the DUT Therefore the output voltage of the converter is equal to the product of the current through the DUT and the range resistor value Accordingly the impedance is calculated using the voltage across the DUT the output voltage of the I V converter and the value of the range resistor Then the potential at the LOW terminal is approximately zero the feedback node is at virtual ground thus the range resistor value has no effect on the current through the DUT EDUT ERR Range Resistor Amplifier V EDUT ERR EDUT 18 lx ix 2X REX B 7 Rr ERR 49 o 5 5 Figure 3 7 Converter 3 2
101. e zero offset and then updates the EEPROM calibration data to optimize the impedance measurement accuracy NOTE All other adjustments must have been completed before performing this adjustment EQUIPMENT Computer HP 9826A gt Multimeter HP 3458A E Cable HP 10833A 2 Alligator Clips to 1 Dual Banana Plug 5 Test Lead HP 11002A Calibration R L Standard HP 16074A Adapter to BNC f HP PN 1250 0080 4 ea Test Leads 1 m HP 16048A Test Leads 2 m HP 16048D Option 006 only Test Leads 4 m HP 16048E Option 006 only PROCEDURE 1 Display the adjustment program s main menu referring to paragraph 2 7 2 INITIAL OPERATING PROCEDURE 2 Press the Adj 3 softkey to select the Impedance Measurement Adjustment NOTE When the computer cannot access the HP 3458A the HP IB address registration display appears Enter the HP 3458A s HP IB address using the numeric keys and the Enter softkey 3 Perform the null amplifier DC offset adjustment according to the program s in struction Figure 2 14 shows the adjustment setup Figure 2 15 shows the A2TP3 X30 2 GND and A2R123 NULL AMP VOS ADJ locations 2 19 2 Alligator clips to 1 Dual Banana Plug Test Lead Lo input to A2TP4 MULTIMETER Hi input to A2TP3 HP 4284A 7 8859 n 200000 coo oooojOC coodadado acaooojijoon 111111 Figure 2 14 Null Amplifier DC Offset Adjustment Setup A2R123 NULL AMP OFS ADJ
102. efix is the same for all identical instruments it changes only when a change is made to the instrument The suffix however is assigned sequentially and is unique to each instrument The contents of this manual apply to instruments with the serial number pre fixes listed under Serial Numbers on the title page Wr YOKOGAWA HEWLETT PACKARD SERIAL NO VADE N Figure 1 1 Serial Number Plate An instrument manufactured after the printing date of this manual may have a serial number prefix that is not listed on the title page This unlisted serial number prefix indicates that the instrument is different from those described in this manual The manual for a new instru ment may be accompanied by a yellow Manual Changes supplement or have a different manual part number The Manual Changes supplement contains change information that explains how to adapt the manual to newer instruments In addition to change information the supplement may contain information for correcting errors Errata in the manual To keep this manual as current and accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes sup plement The supplement for this manual is identified by this manual s printing data and its part number both of which appear on the manual s title page Complimentary copies of the supplement are available from Hewlett Packard If the serial prefix or number of an instru ment is lower than
103. ensure that the HP 42844 is within its published specifications after it has been repaired SECTION 3 ASSEMBLY SERVICE INFORMATIONS Section 3 provides assembly service information mechanical parts list disassem bly procedures theory of operation and faulty board isolation procedures When repairing the HP 42844 refer to this section first isolate the faulty board and then repair the HP 4284A at the component level using the faulty board s service sheet in SECTION 4 SECTION 4 SERVICE SHEETS Section 4 provides a service sheet for each board to use for component level repair of the faulty board Each service sheet contains a circuit description troubleshooting aids replaceable parts list component locations and schematic diagram Some boards have been set up under the exchange assembly program So their service sheets only contain the exchange board s part number and the test point information NOTE The performance test procedure is given in Section 10 of the HP 4284A Operation Manual P N 04284 90000 1 1 1 3 INSTRUMENTS COVERED BY THIS MANUAL Hewlett Packard uses a two part nine character serial number which is stamped on the serial number plate see Figure 1 1 attached to the instrument s rear panel The first four digits and the letter are the serial prefix and the last five digits are the suffix The letter placed between the two sections identifies the country where the instrument was manufac tured The pr
104. est selected by a bit switch 1 Power on self test Every time the 4284A is turned on it performs a power on self test as part of the power on sequence The 4284A performs the following self tests at power on e ROM check sum test e RAM R W test EEPROM check sum test If the power on self test fails one of the error messages listed in Table 3 11 will be displayed Table 3 11 Error Messages RAM TEST ERROR The RAM R W test failed ROM CHECK SUM ERROR The check sum of one of the programmed ROMs on the A7 board is incorrect The ROM number with this message is shown on A7 service sheet SECTION 4 SYSTEM DATA CSUM EHROR The check sum of the data on the SYSTEM CONFIG page in EEPROMs on the A7 board is incorrect CORR DATA CSUM ERROR The check sum of the data on the CORRECTION page in EEPROMs on the A7 board is incorrect The check sum of the calibration data in EEPROMs on the A7 board is incorrect CALIB DATA CSUM ERROR SCANNER DATA CSUM ERROR The check sum of the correction data for the multi correction EEPROMs on the scanner board 40 is incorrect 3 35 Cad 2 50 242 O C lt 62 Also Every time the HP 4284A turned the power on sequence for example initial izes the timer on A7 is performed This power on sequence is checked by watching the LED array A7DS3 A7DS4 See
105. fies the output of the secondary windings of A1T3 and outputs 5 V 8 V 12 V 15 V 21 V and 48 V Over Voltage Detector A1CR40 A1CR41 A1CR43 A1CR44 A1CR45 A1CR47 make up the over voltage detector If any voltage exceeds its limit the over voltage detector will send a shutdown signal to A1U5 opto coupler which will transfer the signal to the shutdown circuit 4 A1 2 4 8 2 TROUBLESHOOTING AIDS Table 4 4 shows the troubleshooting waveforms and Table 4 5 lists the DC output voltage at each test point DISCONNECT THE POWER CABLE BEFORE WATCHING THE BELOW WAVEFORMS HP 4284A Setup Disconnect the power cable Remove the A1 board Set A1W1 to the test position A1TP3 to A1TP10 Supply 12 V DC to A1TP2 referenced to A1TP3 C gt Table 4 4 Power Supply Troubleshooting Data HP 4284 Settings Measurement Setup CHAN A1TP1 1 5 TRIG CHAN A Negative See Above 18 9 V div 180 0 V div 19 0 us div 1 4 CHAN A1TP8 TRIG CHAN A Negative See Above 18 80 Vediv 18 0 V div 18 8 us div 4 A1 3 Bam gt D lt lt e 2 Table 4 5 A1 DC Voltage and Test Points Test Point Name Actual DC Voltage A1TP13 A1TP14 1 15 A1TP16 A1TP17 A1TP18 4 8 3 REPLACEABLE PARTS LISTS The replaceable parts for the A1 board are listed in Table
106. inish the adjust ment program 2 9 2 8 POWER SUPPLY ADJUSTMENTS The following two part procedure adjusts the switching frequency and the output voltage of the switching power supply 2 8 1 POWER SUPPLY SWITCHING FREQUENCY ADJUSTMENT This adjustment sets the switching frequency of the power supply EQUIPMENT Oscilloscope HP 54111D 10 1 Divider Oscilloscope Probe 1 HP 10431A PROCEDURE 1 Make sure the HP 42844 is turned OFF 2 Loosen the two screws holding the left hand side top shield plate the shield plate on which the WARNING message is printed and remove it DANGEROUS VOLTAGES ARE PRESENT ON THE BOARD UNDER THE SHIELD PLATE DON T TOUCH ANYPLACE EXCEPT WHERE INSTRUCTED TO 3 Connect the 10 1 Probe to the Oscilloscope input 4 Connect the probe s ground lead to A1TP12 GND Then connect the probe s tip to A1TP11 Figure 2 4 shows the location of TP11 and TP12 10 1 Probe OSCILLOSCOPE Ground to ATTP12 HP 4284A Tip to A1TP11 00008 e oO a m O Figure 2 3 Power Supply Frequency Adjustment Setup 2 10 ATR19 1 12 FRE Q ADJ GND ATR19 FREQ ADJ 1 BOARD Figure 2 4 Power Supply Frequency Adjustment Location INO gt c T ot D 5 Set the Oscilloscope controls as follows INPUT Range 40 V Offset 10 V Coupling DC 1 MQ TIMEBASE Range 50 us 6 Turn the HP 4284A ON 7 Adjust A1R19 FREQ A
107. inished by pressing the Exit softkey STEP4 Each adjustment is performed STEP5 EEPROM write protection is confirmed Figure 2 1 Adjustment Program Flow 2 7 2 INITIAL OPERATING PROCEDURE This paragraph gives the procedure to perform before the Adjustments EQUIPMENT Adjustment Program Disc 5 inch PN 04284 65001 Computer HP 9000 Series 200 Model 226 HP IB Cable HP 10833A n gt vo qu gt 4 PROCEDURE 1 Turn the HP 4284A OFF and remove the A7 board assembly 2 Set the HP 4284A s EEPROM write protect jumper A7W2 from the normal posi tion N to the test position 3 Install the board assembly into the HP 4284A 4 Connect the HP 4284A HP 3458A and the Computer using the HP IB Cables The computer s interface select code must be set to 7 Figure 2 2 shows the setup COMPUTER p HP IB Cabie HP 4284A MULTIMET e gt OGOOGOSG Figure 2 2 Adjustment Program Setup 5 Turn the HP 4284A HP 3458A and computer ON 6 Change the HP 3458A s address if it is same as the 4284A s 7 Boot up BASIC and load the necessary binary files in the computer The neces sary BASIC BiNaries for revision 5 0 are as follows GRAPH 10 MAT KBD ERR HPIB CRTA COMPLEX CRTX 2 8 8 Load the calibration program in the computer the file name is ADJ 4284A
108. lay the adjustment program s main menu referring to paragraph 2 7 2 INITIAL OPERATING PROCEDURE 2 Press the Adj 1 softkey to select the DC Bias Level Adjustment NOTE When the computer cannot access the HP 3458A the HP IB address registration display appears Enter the HP 3458A s HP IB address using the numeric keys and the Enter softkey 3 Perform the adjustment according to the Programs instruction Figure 2 10 shows the adjustment setup MULTIMETER BNC f dual banana 12520 es gzzg ees ee pooni 2 soon OC cj COO cioacoon EE ESN BNC m BNC m INTERFACE BOX Cable 30 cm DC BIAS TEST SIGNAL Figure 2 10 DC Bias Level Adjustment Setup 2 16 2 11 TEST SIGNAL LEVEL LEVEL MONITOR ADJUSTMENT This adjustment sets the signal source output voltage then updates the EEPROM calibration data to set the test signal level and test signal level monitor reading EQUIPMENT Computer HP 9826A Multimeter HP 3458A HP IB Cable HP 10833A Resistor 100 ohm HP PN 04284 65004 Interface Box HP PN 04284 65007 BNC m to BNC m Cable 30cm HP PN 8120 1838 BNC f to Dual Banana Plug Adapter HP PN 1251 2277 NO gt cx p D 2 PROCEDURE 1 Display the adjustment program s main menu referring to paragraph 2 7 2 INITIAL OPERATING PROCEDURE 2 Press the Adj 2 softkey to select the Test Signal Le
109. ment when adjusting the HP 4284A If the recom mended test equipment is not available equipment whose specifications are equal to or surpass those of the recommended test equipment may be used 2 4 ADJUSTABLE COMPONENTS Table 2 1 lists the HP 4284A s adjustable components the name of the adjustment related to each component and gives a brief description of each adjustment Table 2 1 Adjustable Components Adjustable Adjustment Description Component Name A1R19 FREQ ADJ Power Supply Switching Frequency Adjustment A1R52 V ADJ Power Supply Output Voltage Adjustment NULL AMP VOS ADJ A2R123 Null Amp DC offset Adjustment A2R224 0 DEG Zero Offset Adjustment 0 A2R324 90 DEG Zero Offset Adjustment 90 A3R353 SENSE AMP VOS ADJ Sense Amp DC Offset Adjustment A5R11 OSC LVL Signal Source Adjustment 2 2 2 5 ADJUSTMENT INTERACTION some of the HP 4284A adjustments are interactive you repair or replace an HP 4284A assembly be sure to perform the related adjustment s in the sequence given Table 2 2 lists the adjustments required for each assembly repaired or replaced Ignoring or changing the adjustment sequence will make it impossible to obtain optimum performance Table 2 2 Required Adjustments Assembly Replaced or Repaired Adjustments Required Paragraph Number Power Supply 2 8 Modulator 2 12 Range Resistor 2 9 2 11
110. nsure proper results and correct instrument operation Hewlett Packard sug gests a 30 minute warm up and stabilization period before performing any of the following adjustments 2 2 SAFETY CONSIDERATIONS This manual contains NOTES CAUTIONS and WARNINGs which must be followed to ensure the safety of the operator and to keep the instrument in a safe and serviceable condition The adjustments covered in this section must be performed by qualified service personnel ANY INTERRUPTION OF THE PROTECTIVE GROUND CONDUCTOR INSIDE OR OUTSIDE THE INSTRUMENT OR DISCONNECTION OF THE PROTECTIVE GROUND TERMINAL CAN MAKE THE INSTRUMENT DANGEROUS INTENTION AL INTERRUPTION OF THE PROTECTIVE GROUND SYSTEM FOR ANY REASON IS PROHIBITED The removal or opening of covers for adjustment or removal of parts other than those which are accessible by hand will expose circuits containing dangerous voltage levels Remember that even though you have turned the HP 4284A off and unplugged it the ca pacitors in the HP 4284A can remained charged for several minutes 2 1 THE ADJUSTMENTS DESCRIBED IN THIS SECTION ARE PERFORMED WITH POWER APPLIED AND THE PROTECTIVE COVERS REMOVED DANGEROUS VOLTAGE LEVELS EXIST AT MANY POINTS AND CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH IF YOU COME INTO CONTACT WITH THEM 2 3 TEST EQUIPMENT Table 1 1 lists the test equipment required to perform the adjustments described in this section Use only calibrated test equip
111. ons than the printing date of this manual Table B Manual Changes by Firmware s Version There are no earlier versions than the printing date of this manual gt gt Eo us Ce e D 2 1 NOTES A 2 REGIONAL SALES AND SUPPORT OFFICES For more information about Agilent Technologies test and measurement products applications services and for a current sales office listing visit our web site http www agilent com find tmdir You can also contact one of the following centers and ask for a test and measurement sales representative 11 29 99 United States fax 61 3 9272 0749 Agilent Technologies tel 0 800 738 378 New Test and Measurement Call Center fax 64 4 802 6881 P O Box 4026 Englewood CO 80155 4026 Asia Pacific tel 1 800 452 4844 Agilent Technologies 24 F Cityplaza One 1111 King s Road Canada Taikoo Shing Hong Kong Agilent Technologies Canada Inc tel 852 3197 7777 5150 Spectrum Way fax 852 2506 0284 Mississauga Ontario LAW 501 tel 1 877 894 4414 Europe Agilent Technologies Test amp Measurement European Marketing Organization P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9999 Japan Agilent Technologies Japan Ltd Call Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Latin America Agilent Technologies Latin American Region Headquarters 520
112. or troubleshooting Bow CD lt D ps e 4 A11 1 Table 4 A11 1 A11 Motherboard Replaceable Parts List 04284 66511 N 1251 4938 1251 5066 1251 7406 1252 1404 1252 1404 O 1252 1745 1252 1745 1252 1745 1252 1745 C9 CO 09 1252 1745 1252 1745 1252 1745 1252 1745 1252 1745 C C CO 1252 1745 1252 1745 1252 1745 1252 1745 C CO 1252 1745 1252 1745 1252 1745 C 1251 4938 1251 5066 1252 1404 04278 61624 04278 61629 A11 MOTHERBOARD CONNECTOR CONN POST CONNECTOR CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONN POST CONNECTOR CONN POST CONN POST FL CBL ASSY FL CBL ASSY Reference HP Part C Mfr 3 PIN M METRIC POST TYPE TYPE 2 5 PIN SPCG 2 CONT 10 PIN M METRIC POST TYPE TYPE TYPE TYPE TYPE TYPE TYPE TYPE 3 PIN TYPE 2 54 PIN SPCG 34 CONT 2 54 PIN SPCG 34 CONT 64 CONT 64 CONT 64 CONT 64 CONT 64 64 64 CONT 64 CONT 64 CONT 64 CONT 64 CONT 64 CONT 64 CONT 64 CONT
113. ore touching them DO NOT Service Or Adjust Alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT Substitute Parts Or Modify Instrument Because of the danger of introducing additional hazards do not install substitute parts or perform unauthorized modifications to the instrument Return the instrument to a Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained Dangerous Procedure Warnings Warnings such as the example below precede potentially dangerous procedures throughout this manual Instructions contained in the warnings must be followed Warning Dangerous voltages capable of causing death are present in this instrument Use extreme caution when handling testing and adjusting 4 this instrument Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institution s calibration facility or to the calibration facilities of other International Standards Organization members Warranty This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period
114. ply block section digital con trol block section source block section transducer TRD block section and vector ratio detector VRD section Each description of each block section is described from the next paragraph and the 4284A s analog circuit block diagrams Source TRD and VRD sections are shown at the end of this paragraph 3 9 1 POWER SUPPLY BLOCK SECTION The power supply is only A1 board which supplies the dc voltage 5 V 12 V 18 V and 21 V to each assembly All service information for the A1 power supply board is given on the SECTION 4 SERVICE SHEET Figure 3 3 shows the simplified block diagram and Table 3 10 shows the relationship between the output dc voltages from the A1 board and each assembly A9 12 A13 Keyboard DC AC Converter gt 1 2 1 600V i A1 A90 sv A91 Keyboard Display 21 Control e 5 _ _ A10 Memory Card Motherboard 12VFAN COOLING FAN LCD Power Supply Display NVAAZTE ASTE 8 ASF 12 21y ABF ASt A2 A3 A4 A5 A6 A7 A20 A30 A31 A40 A50 Analog Boards and Digital Boards Figure 3 3 Power Supply Simplified Block Diagram 3 21 2 gt c C a 8 lt 2 lt O Table 3 10 Relationship between the DCV from A1 and Each Assembly 2 Cooling e bebeb i Se sem
115. quired equipment are listed in Table 1 1 SECTION 1 Perform the following procedure to isolate the faulty board 1 Connect the HP IB cable belween the HP IB connectors on the 4284A s rear panel and on the controller s rear panel and connect the HP IB cable between the HP IB connectors on the 4284A s rear panel and the HP 3458 s rear panel Figure 3 14 shows the setup COMPUTER m HP IB Cable HP 4284 9 5 Figure 3 14 Faulty Board Isolation Program Setup Boot up BASIC and load the necessary binary files in the controller Load the faulty board isolation program in the controller the file name is SVC 4284A Press the controller s RUN key After two minutes the nessecary equipment list will be displayed on the controller s screen The necessary equipment is also listed in Table 1 1 SECTION 1 Press the controller s NextStep softkey The HP IB address list will be dis played on the controller s screen Set the 4284A s HP IB address and 3458A s HP IB address using the proper controller softkeys and press the controller s NextStep softkey If you don t get the 4284A s HP IB address due to a problem with the 4284A press the Next Step softkey without entering the 4284A s HP IB address The main menu will be displayed on the controller s screen as follows 3 40 MAIN MENU Auto Sequence Trouble Isolation f2 to f6 Power supply Trouble
116. r are listed in Table 4 A9 A13 A90 A91 2 The replaceable parts for the A90 Keyboard Display Control and the A91 LCD module are listed in Table 4 A9 A13 A90 A91 3 The A90 and A91 boards are repaired at the assembly level only because the components on each board are surface mounted and are difficult to replace So only the complete assembly part numbers are listed in Table 4 A9 A13 A90 A91 3 4 15 4 COMPONENT LOCATIONS The component locations for the A9 Keyboard and the A13 DC AC Converter board are shown in Figure 4 A9 A13 A90 A91 1 Component locations for the A90 and A91 boards are not shown because these boards are repaired at the assembly level only 4 15 5 SCENE DIAGRAMS The A9 Keyboard A13 DC AC Converter A90 Keyboard Display Control Unit and A91 LCD Module schematic diagrams are shown in Figure 4 A9 A13 A90 A91 2 4 A9 A13 A90 A91 1 qu gt 47 lt C 24 D 4 e Table 4 A9 A13 A90 A91 1 A9 Keyboard Replaceable Parts List Reference HP Part Mfr A9 A9 04279 66559 1 1 KEY BOARD 04279 66559 A9C1 0180 0197 8 1 CAPACITOR FXD 2 2UF 10 20VDC 1500225 9020 2 9051 1990 0487 4 LED LAMP LUM INT 2MCD BVR 5V HLMP 1401 9052 1990 0487 7 LED LAMP LUM INT 2MCD BVR 5V HLMP 1401 A9DS3 1990 0487 7 LED LAMP LUM INT 2MCD BVR 5V HLMP 1401 A9DS4 1990 0487 7 LED LAMP LUM INT 2MCD BVR 5V HLMP 1401 9055 1990 1226 4 1 LED LAMP LUM INT 2 2MCD 20 1990 1226
117. ram The crystal oscillators are 19 2 MHz 16 0 MHz and 15 36 MHz One of three crystal oscilla tors FCLK is selected and the output signal is divided by N using the programmed N di vider The divided signal is applied to the quasi sine wave generator which generates a digital sinewave staircase waveform The digital sinewave s frequency is the same as the output test frequency So the available test frequencies F are caluculated using the follow ing fomula FCLK NxM Where FCLK 19 2 MHz 16 0 MHz 15 36 MHz N 2 to 4095 integer M 8 16 32 64 128 256 The digital sinewave is filtered by the LPF and the filtered sine wave is input to the D A converter DAC as a voltage reference So the 4284 covers various test signals with a high resolution by using both the DAC and the attenuator 3 25 401 9 10 4 gt C e m lt e lt The A4 high power amplifier dc bias board generates the DC output voltage using the DAC and also amplifies the AC output signal from the A5 board The A4 high power amplifier dc bias board consists of the reference voltage the D A converter the attenuator the power amplifier x 10 two switching relays Refer to Figure 3 6 DC ore ON HI PW mode Hcur Terminal OFF HI PW mode OFF HI PW mode Figure 3 6 High Power Amplifier DC Bias A4 Simplified Block Diagrams The reference voltage Vref is 5 V whos
118. rdering COMPONENT LOCATIONS SCHEMATIC DIAGRAMS A1 POWER SUPPLY SERVICE SHEET A2 MODULATOR SERVICE SHEET A3 RANGE RESISTOR SERVICE SHEET A4 HIGH POWER AMPLIFIER DC BIAS SERVICE SHEET A5 SIGNAL SOURCE SERVICE SHEET A6 VECTOR RATIO DETECTOR SERVICE SHEET A7 DIGITAL CONTROL SERVICE SHEET A9 A13 A90 A91 SERVICE SHEET A10 MEMORY CARD INTERFACE SERVICE SHEET A11 MOTHERBOARD SERVICE SHEET A30 HANDLER INTERFACE OPT 201 SERVICE SHEET A40 SCANNER INTERFACE OPT 301 SERVICE SHEET A20 HP IB INTERFACE SERVICE SHEET A31 HANDLER INTERFACE 202 SERVICE SHEET MANUAL CHANGES INTRODUCTION 4 3 4 4 4 5 4 5 4 5 4 5 4 A1 1 4 A2 1 4 A3 1 4 4 1 4 5 1 4 6 1 4 7 1 4 A9 A13 A90 A91 1 4 A10 1 4 A11 1 4 A20 1 4 A30 1 4 A31 1 4 A40 1 A 1 A 1 A 2 MANUAL CHANGES SECTION 1 GENERAL INFORMATION gt D D C e 1 1 INTRODUCTION This manual contains technical information concerning the adjustment and servicing of the HP 4284A PRECISION LCR METER 1 2 MANUAL ORGANIZATION This manual contains four sections A summary of each section follows SECTION 1 GENERAL INFORMATION Section 1 describes this service manual and lists the recommended test equip ment for performance testing adjusting and servicing the HP 4284A SECTION 2 ADJUSTMENTS Section 2 provides the necessary adjustments required to
119. rrecting manual errors and for adapting the manual to newer instruments that contain improvements or modifications not documented in the existing manual To use this supplement 1 Make ERRATA corrections 2 Make all appropriate serial number related changes listed below _ SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES SERIAL PREFIX OR NUMBER MAKE MANUAL CHANGES and above 284800388 and above gt New ERRATA Page 3 3 Figure 3 1 Assembly Identification 1 2 Exchange the assembly labels A40 and 50 In HP 4284A A40 is on the right of A50 Page 3 14 Table 3 7 Rear Panel Components see Parts Information Table at the end of this supplement Page 3 37 Table 3 12 Bit Switch Selected Self Test Correct Bit Switch No 5 setting as shown next NOTE Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible Hewlett Packard recommends that you periodically request the latest edition of this supplement Free copies are available from all HP offices When requesting copies quote the manual identification information from your supplement or the model number and print date from the title page of the manual HEWLETT PACKARD Date Div March 1 1990 33 0 Page 1 of 5 PRINTED IN JAPAN CHANGE 1 Page 1 A30 4 Table 1 46 A30 Handler Interface Replaceable Parts List See the Parts Information Table at the end of this supplement Page 1 A30 5
120. s floppy disc P N 04284 65002 3 5 inches floppy disc P N 04284 65009 Software Environment The faulty board isolation program is written in HP BASIC HP BASIC 5 0 and above version must be required to run this program in addition to the following several binary files HP IB KBD GRAPH GRAPHX PDEV IO Making a Back up Copy This program disc stores the HP IB address data So this disc is not write protected To protect the program make a back up copy using the master disc File Name There are two files in Table 3 13 are stored in the faulty board isolation program disc Table 3 13 File Name Trouble Isolation Main Program HP IB Address Data SVC 4284A HP ADRS 3 38 Flow chart The basic flowchart of the faulty board isolation program is shown in Figure 3 14 START HP IB ADDRESS ENTRY MAIN MENU Power JE Supply Group Figure 3 14 Flow chart NOTE When either the power supply group trouble isolation or the digital group trouble isolation is performed you don t have to connect the HP IB cable between the controller and the HP 4284A Check the 4284A in accordance with the message on the controller s screen 3 39 gt e n c 5 7x lt D 3 10 2 FAULTY BOARD ISOLATION PROCEDURE This paragraph provides the procdures for isolating the faulty board Re
121. se detector and integrator An I V converter is used to detect difference between the device under test and the feedback resistor and outputs this difference as a proportional error voltage phase detector and an integrator covert the error voltage into a dc voltage proportinal to the or thogonal vector components The vector generator consists of two amplitude modulators a 90 phase shifter and a sum ming amplifier The reference signal from the test oscillator is amplitude modulated using the null detector s dc error voltage output When the error voltage from the null detector goes negative the phase of the output signal from the vector generator shifts 180 0 phase component of the error voltage is fed into the input of the modulator and this O phase component modulated output of the modulator is ded directly into the input of the summing amplifier The 90 phase component modulated output of the modulator is fed into a 90 phase shifter before being fed into the summing amplifier The output voltage of the summing amplifier is fed back through the range resistor to cancel the error current thereby keeping the bridge balanced Range Resistor CONVERTER Shifter NULL DETECTOR VECTOR GENERATOR Figure 3 9 Auto Balance Bridge 3 29 Ca gt a 05 o E m UC O c 2 X lt qu 3 9 5 VECTOR RATIO DETECTOR SECTION
122. signal for CPU Valid peripheral signal 8 x F test frequency signal 12 V for the cooling fan 12 V for the cooling fan 5 V for the memory card 4 2 4 5 REPLACEABLE PARTS LIST The replaceable parts list provides information about the replaceable parts 4 5 1 ABBREVIATIONS Table 4 2 lists the abbreviations used throughout this manual In some cases three forms of the same abbreviation are used all upper case all lower case and mixed upper and lower case Abbreviations used in the parts lists are always upper case and mixed upper and lower case letters Table 4 2 List of Reference Designators and Abbreviations assembly motor z battery capacitor coupler diode delay line device signaling lamp amperes automatic requency control amplifier beat frequency oscillator beryllium copper binder head bandpass brass backward wave oscillator counter clockwise ceramic coefficient common composition complete connector cadmium plate cathode ray tube clockwise deposited carbon drive uo electrolytic encapsulated external farads femto 10715 Nat head fillister head fixed giga 10 germanium z glass ground ed on pg og cabinet mount only INT k LH LIN LOG m M MET FLM MET OX MFR MINAT MOM MTG MY n N C NE NI PL N O NPO t n Hn 9 n M H4 H HW Wn al
123. that secure the A13 assembly to the back of the shield case Disconnect the 3 pin cable from the A90 assembly Disconnect the 3 pin cable from the A91 assembly and remove the A13 board assembly 3 8 8 A91 LCD MODULE ASSEMBLY REMOVAL Remove the 4284A s front panel assembly as described the paragraph 3 8 4 1 Remove the four screws that secure the shield case on which the WARNING label is printed Remove the 3 pin cable that connects between the A13 assembly and the A91 assembly Remove the 13 pin cable from the A91 assembly Remove the 3 pin cable from the A91 assembly and remove the A91 LCD mod ule assembly NOTE The A91 LCD module assembly consists of its LCD panel and the control circuit Do not disassemble the LCD module the LCD panel and the circuit board must remain together as a unit 48 gt 2 ni to me lt gt gt lt D A10 AM im ME 90 M Me S men amm AEA NATRI o AA M A9 A9 Figure 3 2 A9 A10 A13 A90 or A91 Assembly Removal 3 20 3 9 THEORY OF OPERATION This paragraph discusses about the 4284A s principle of operation and how the 4284A s high measurement accuracy and its fully automated measurement performance are achieved The HP 4284 is composed of five block sections power sup
124. to check the resistance from the instrument enclosure to the power cord s ground pin The resistance must be less than 0 5 Flex the power cord while making this measurement to determine if any intermittent discontinuities exist Check the GUARD terminal on the front panel using the procedure outlined in step 2 Unplug the 4284A s power plug from the power source Set the power switch to ON Tie the line and neutral pins of the power connector together and check the resistance between them and the instrument s enclosure The minimum acceptable resistance is 2 Find and replace any component which causes the instrument to fail this test Verify that the correct fuse is installed 3 2 3 5 ASSEMBLY DESIGNATIONS AND LOCATIONS Assemblies such as printed circuit boards are assigned sequential numbers A1 A2 etc as shown in Figure 3 1 Figure 3 1 also gives the location of the assemblies ASO 4 1 A20 A5 4 SUO eul10 U BdIAJaS jquassy ge Power Supply Board Assembly Modulator Board Assembly Range Resistor Board Assembly High Power Amplifier DC Bias Board Assembly Option 001 signal Source Board Assembly Phase Detector A D Converter Board Assembly Digital Contro Board Assembly Motherboard Assembly HP IB Interface Board Assembly A30 A31 Handler Interface Board Assembly Option 201 202 A40 Scanner Interface Board Assembly Option 301
125. trim from the front frame Remove the two front feet from the bottom cover Remove the three screws from the bottom of the front frame Remove the three screws from the top of the front frame Carefully remove the 4284A s front panel assembly 3 8 5 A9 OR A90 ASSEMBLY REMOVAL First remove the front panel assembly from the 4284A as described in paragraph 3 8 4 1 2 Loosen the two hex set screws on the CONTRAST knob and remowve it Disconnect the flat cable assembly that interconnects the motherboard to the A90 assembly Disconnect the 3 and 13 pin cables from the A90 assembly Remove the seven nuts that secure the A9 assembly Remove the four screws that secure the A90 assembly to the A9 assembly and slide the A90 assembly out Disconnect the 3 pin cable from the A9 assembly Disconnect the wires that connect the A90 and A9 assemblies 3 8 6 A10 ASSEMBLY REMOVAL First remove the front panel assembly from the 4284A as described in paragraph 3 8 4 1 2 Disconnect the flatcable assembly that is connected to the motherboard from the A10 assembly Remove the two screws nuts and washers that secure the A10 assembly to the MEMORY card bezel and remove the A10 board 3 8 7 A13 ASSEMBLY REMOVAL First remove the front panel assembly from the 4284A as described in paragraph 3 8 4 jp Remove four screws that secure the shield case on which the WARNING is printed Remove the screw
126. ug 4 BNC m Cable Length 1 m HP 16048A 4 BNC m Cable Length 2 m HP 16048D 4 BNC m Cable Length 4 m HP 16048 HP IB Cable HP IB cable 1 m HP 10833A Computer HP Technical Computer HP 9000 Series 200 With BASIC rev 5 0 or above Model 226 RAM s capacity 21 M bytes Memory Card furnished accessory HP PN 04278 89001 1 3 Table 1 1 Recommended Test Equipment 2 of 2 Bias IF No substitute HP PN 42841 65001 Simulator Handler No substitute HP PN 04278 65001 Simulator Scanner No substitute HP PN 04278 65301 Simulator Simulator No substitute HP PN 04278 61635 Cable Bias IF No Substitute HP PN 42841 61640 Cable Extender Board For Half Board HP PN 04278 66596 For Digital Board HP PN 04278 66597 For Analog Board j HP PN 04278 66598 Troubleshooting No substitute HP PN 04284 61650 Cable P Performance Test A Adjustments T Troubleshooting 1 4 SECTION 2 ADJUSTMENTS 2 1 INTRODUCTION This section describes the adjustments required to ensure that the HP 4284A Precision LCR Meter is within its published specifications after it has been repaired These adjustments should be performed along with periodic maintenance to keep the HP 4284A in optimum operating condition The recommended calibration cycle is six months If proper perfor mance cannot be achieved after calibration refer to the troubleshooting procedures in this service manual NOTE gt N ct D e Co To e
127. ure 4 40 2 A40 Scanner Interface Schematic Diagram 1 of 3 18 Dit4 14 14 0 14 2 170012 12 10 0 10 4 16 0 10 10 8 PD 8 5 15 D 8 E BDEY 8 4 BD 4 7 Dip 4 2 BD 2 12 02 2 0 BD 0 9 DO 18 15215 17 0 13 13 160411 11 5 9 BD 9 CE BD 7 amp 3 BD 3 1 1 9 14 DO 7 13 5 5 2279134 80 0 15 1 15 016 013 013 10 15 1 15 2 of 3 RAM lt EEPROM O CLR UR F OPIATO 2 of 3 To All 2 DTACK 26 HI To O BE o of 5 OBR W To O BLDS 2 of 3 OQ BUDS 3 of 3 NOTES 1 REFERENCE DESIGNATORS WITHIN THIS ASSEMBLY ARE ABBREVIATED PREFIX ABBREVIATION WITH ASSEMBLY NUMBER FOR COMPLETE REFERENCE DESIGNATOR 2 UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS 2 CAPACITANCE IN MICROFARADS uF INDUCTANCE IN MICROHENRIES uH 4 A40 7 A40 SCANNER INTERFACE From EXT DCV O lof 3 1 x 2 J1 o CHO From 35 CHS Rear 0 15 BD 0 15 1 15 1 15 PIA O 3 BLDS O BR U O From BRESET O l of 3 COMMON O 2 OF 3 R25 470 ai 0 BD O 33 NIB oma EP PP i NT BD ERES 1 34 pum ey Hm
128. vel Level Monitor Adjustment NOTE When the computer cannot access the HP 3458A the HP IB address registration display appears Enter the HP 3458A s HP IB address using the numeric keys and the Enter softkey 3 Perform the signal source adjustment according to the program s instruction Figure 2 11 shows the adjustment setup Figure 2 12 shows the location of A5R11 OSC LVL MULTIMETER et 29 BNC f dual banana piug Adapter coco coon BNC m BNC m Cable 30 cm Figure 2 11 Signal Source Adjustment Setup 2 17 OSC LVL Figure 2 12 Signal Source Adjustment Location 4 Perform the test signal level level monitor adjustment EEPROM data updating according to the program s instruction Figure 2 13 shows the adjustment setup 1 Test Signal Level Adjustment Setup HP 4284A MULTIMETER BNOCff dual banana plug Adapter Eu oo D HOO oaaocio0ng VERE SENE BNC m BN Cim Cable 30 cm DC BIAS TEST SIGNAL 2 Test Signal Level Monitor Adjustment Setup HP 4284 MULTIMETER BNC f dual banana plug Adapter 0888588 22 5555006 pem i RESISTOR 100 ohm BNC m BNC m Cable 30 cm Figure 2 13 Test Signal Level Level Monitor Adjustment Setup 2 18 2 12 IMPEDANCE MEASUREMENT ADJUSTMENT This adjustment minimizes the amplifier DC offset and th

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