Service Manual
Contents
1. LASO4012 Figure 4 12 Test Pad Locations 4 16 Troubleshooting Check 12 DC DC Converter Open Output Voltages 1 Turn off the 4339B 2 Disconnect the DC DC Converter Output Cable shown in Figure 4 13 from connector J12 on the Al Main Board Assembly 3 Turn the 4339B on 4 Using a multimeter check if the DC DC Converter open output voltages on the output connector pins shown in Figure 4 13 are in the ranges shown in Table 4 2 5 If passed replace the Al Main Board Assembly otherwise replace the DC DC Converter Assembly LASO4011 Figure 4 13 DC DC Converter Output Connector Table 4 2 DC DC Converter Open Output Voltages Pin Pin Voltage Range2. d o O N Black Reference Agilent Part Qty Description Designation Number 1 04339 61608 1 Wire Assy 2 04339 61607 1 Cable Assy 04339 24010 1 Sleeve 0890 0312 25 mm Tube Heat Shrink 04339 25004 1 Core Holder 0515 1550 1 Screw M3 3 04339 61605 4 Cable Assy Optical 4 04339 61614 1 Wire Assy Binding Post 5 04339 61606 1 Wire Assy Black 0890 1806 20 mm Tube Heat Shrink 6 04339 61612 1 Wire Assy Red 0890 1480 15 mm Tube Heat Shrink 0890 1806 20 mm Tube Heat Shrink 7 04339 61613 1 Wire Assy 8 04339 61616 1 Wire Assy 0890 0311 15 mm Tube Heat Shrink 0890 1806 20 mm Tube Heat Shrink 9 04263 61611 1 Wire Assy 10 04339 61615 1 Wire Assy 0890 0311 15 mm Tube Heat Shrink 1 Must be twisted 3 8 Assembly Replacement Table 3 8 Replaceable Mechanical Parts List 5 4 L5503007 Triaxial Connector A Soldering Side View Reference Agilent Part Qty Description Designation Number 1 0160 7457 1 Capacitor 2200 pF 1 6 kV 2 1901 1250 2 Diode 3 04339 24013 1 Stick 4 04
3. Reference Agilent Part Qty Description Designation Number 1 04339 25002 3 Support Line Switch Plate 0515 0914 3 Screw M3L4 Flat Head 2 0515 1550 4 Screw M3 for A3 04339 25003 5 Standoff Hidden for A3 3 1400 1048 1 Edge Saddle 4 04339 00601 1 Case Shield 0361 1360 2 Rivet Nyron for Shield 04339 01202 1 Plate Line Switch 04263 24001 2 Nut Rod for Transformer 2190 0586 2 Washer Spring M4 04263 00607 1 Plate Shield 0515 01550 4 Screw M3 for A5 0515 2079 1 Screw M4 on the Chassis 10 04263 24002 2 Nut Rod for DC DC Conv 2190 0584 2 Washer Spring M3 11 0515 1550 7 Screw M3 for Al and A2 04339 24006 4 Standoff Hidden for A1 12 04339 00612 1 Insulator Hidden 0460 0616 120 mm x 2 Adhesive Tape for Insulator 13 1400 0866 1 Cable Clamp 14 5040 3347 2 Plate Hidden Chassis Reverse side 0460 0616 200 mm x 2 Adhesive Tape for Plate 15 04263 07001 2 Gasket 0515 1550 4 Screw M3 16 0515 1550 2 Screw M3 17 0370 2862 1 Button Line Switch 04339 23001 1 Shaft Line Switch 0535 0031 1 Nut for Shaft Assembly Replacement 3 7 Table 3 7 Replaceable Mechanical Parts List 4 e Red Black LASO3005 2 Red Blue P
4. 16340A Direct connection no cable Top View Figure 2 3 Ammeter Adjustment Setup 1 2 Perform the following steps as the program instructs 1 Connect the RC Box Adapter s Input cable to the 4339B Input connector 2 Connect the RC Box Adapter s Output cable to the 4339B Output connector 3 Connect the RC Box Adapter s Interlock cable to the 4339B Interlock connector 4 Set the RC Box Adapter switch to F 2 8 Adjustments Upon the program instruction peform the following steps 1 Connect the RC Box Adapter directly to the 16340A s 101 102 connectors 2 Connect the Dual Banana BNC m cable to the RC Box Adapter s Monitor H connector 3 Connect the other end of the Dual Banana BNC m cable to the 3458A INPUT Caution To prevent electrostatic noise which may cause error in the adjustment data do not move the RC Box Adapter cables while the 4339B is in measurement Setup 2 2 This setup obtains the ammeter input resistance 4339B Computer E oojoogo a edooo DODODO YE LET DOOBOREoo JjoojpoDa gH To Monitor L Dual Banana BNC m Cable 16340A Direct connection no cable Top View LASO2004 Figure 2 4 Ammeter Adjustment Setup 2 2 Perform the following steps as the program instructs 1 Di
5. ccn 4 6 4 5 I V Converter Block Diagram ll ele 4 7 4 6 Digital Section Block Diagram a SS SS ee 4 8 4 7 Power Supply Section Block Diagram 4 9 4 8 Troubleshooting Flow 2 SS SS SS SS SS SS SS 4 11 4 9 DC DC Converter Output Voltage Check lll ren 4 12 4 10 CPU Board Assembly LED Light Sequence l l e 4 14 4 11 Location of High Lead of A2F1 Fuse l c ll nn 4 15 4 12 Test Pad Locations 4 l l ll 4 4S 4 16 4 18 DC DC Converter Output Connector 2 2 2 25 2 2 2 5 2 5 4 17 4 14 Transformer Secondary Voltage Check SS SS SS 4 18 B 1 Jumper and Switch Settings l l SS SS SS B 1 Tables 1 1 Required Equipment 2 SS SS SS SS SS SS SS 1 2 1 2 Required Language Extensions SS SS SS SS SS SS SS 1 2 2 1 Related Adjustments oa a a a a SS SS SS SS 2 2 2 2 V Measurement Adapter Switch Settings 0 0 2 00 2 7 3 1 Replaceable Major Assembly List 2 0 02 2 2 2000048 4 E 3 3 3 2 A2 CPU Board Assembly Replaceable Assembly List 2 2 3 4 3 3 Replaceable Assembly List ZEN MM 9 4 9 4 Replaceable Mechanical Parts List 1 EE V VV 3 5 3 5 Replaceable Mechanical Parts List 2 lll 22 048 3 6 3 6 Replaceable Mechanical Parts List 8 SS SS ll SS e 3 7 3 7 Replaceable Mechanical Parts List 4 en
6. 2 5 1 40 2 V 12 40 6 V 12 40 6 V Troubleshooting 4 17 Check 13 Transformer Secondary Voltage 1 Turn off the 4339B 2 Disconnect the transformer secondary connector from connector J13 on the Al Main Board Assembly Refer to Figure 4 14 for the connector location 3 Turn the 4339B on 4 Using a multimeter check if the transformer secondary voltage is between 13 V and 17 Vac 5 If passed replace the Al Main Board Assembly otherwise replace the transformer assembly LASO4016 Figure 4 14 Transformer Secondary Voltage Check 4 18 Troubleshooting Manual Changes Introduction This appendix contains the information reguired to adapt this manual to earlier versions or configurations of the 4339B than the current printing date of this manual The information in this manual applies directly to 4339B High Resistance Meter whose serial number prefix is listed on the title page of this manu
7. DC DC Converter L5 04004 The ac line power is connected to the A5 AC Inlet Board Assembly which consists of a fuse line switch voltage selection switch and the varistors The voltage selection switch selects the ac line voltage either 230 V or 115 V According to the selection the ac line power is connected to the corresponding primary tap of the transformer Varistor VR1 protects the circuit from surge voltage on the line power VR2 blows the fuse F1 if the 4339B is turned on with wrong line voltage setting selection for example 115V selection when using 230 V line voltage Note Because very high dc isolation is required between A3 Ammeter assembly i and the other assemblies the 4339B has two independent dc voltage supply 9 systems Both of the transformer secondary voltages are approximately 14 V One of the ac voltages is rectified and filtered by circuitry on the A1 Main Board Assembly and produces approximately 14 Vdc The dc voltage is applied to the DC DC Converter to produce regulated 5 V 12 V and 12 Vdc The dc voltages are supplied to all the assemblies except A3 either directly or indirectly via the A1 assembly The other ac voltage is rectified and filtered on the A3 Assembly A dc dc converter on the A3 assembly provides regulated 5 V 12 V and 12 Vdc for the A3 assembly operation Troubleshooting 4 9 Troubleshooting Fig
8. performance test Source Voltage Accuracy Test fails Ammeter Adjustment obtains two kinds of the ammeter related factor the input resistance and scaling and a voltage source related factor the output resistance This adjustment should be performed if any performance test fails Rewrite EEPROM writes the adjustment data which is stored in a unit serial number dependent file to the EEPROM Only the adjustment data of previously adjusted item s will be written Note Make sure that the correct line frequency 50 or 60Hz has been selected in the i UUT 4339B window preceding the Main Menu This selection will improve 9 the adjustment data accuracy Adjustments 2 3 Program Installation The adjustment program must be installed in the computer using the following procedures The installation can be divided into two stages Making a Working Copy and Defining the Configuration Making a Working Copy Copy the contents of the adjustment program disk to a working disk or to the harddisk to prevent accidental deletion or destruction of the program files Use the working disk or the harddisk and store the original disk in a safe place Defining the Configuration Define the configuration of the adjustment equipment The configuration includes the GPIB address of the Multimeter The GPIB address will be used as a default in the program Because the program depends on equipment configuration it must be redefined if
9. Remove the heat shrink tube from the BNC connector being replaged Unsolder the cable from the BNC connector being replaced 10 Unscrew the nut which connects the BNC connector to the sub panel 11 Remove the BNC connector 3 16 Assembly Replacement Troubleshooting Introduction This chapter provides assembly level troubleshooting information for the 4339B The information includes theory of operation and troubleshooting Safety Considerations This chapter contains WARNINGS and CAUTIONS that must be followed for your protection and to avoid damaging the equipment Warning The servicing procedures described herein are performed when power is A supplied to the instrument and its protective covers are removed This type of servicing must be performed only by service trained personnel who are aware of the hazards involved for example fire and electrical shock When serving can be performed without power applied to the instrument 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 connected to the protective grounding system Required Equipment Table 1 1 lists the equipment required for troubleshooting Troubleshooting 4 1 After Service Product Safety Checks Warning Whenever it appears likely that protective safety provisions have been impaired the apparatus shall be marked as
10. Chapter 4 Troubleshooting Chapter 4 provides the information on troubleshooting the 4339B The information includes theory of operation and information on faulty assembly isolation Appendix A Manual Changes Appendix A contains manual changes and provides information for using this manual with 4339Bs manufactured before the printing date of the manual Appendix B Default Jumper and Switch Settings Appendix B describes the settings of the jumpers and switches on the 4339B A2 CPU Board Assembly The information is required when the A2 assembly is replaced Contents 1 General Information Introduction a a a a SS SS SS SS SS SS SS o s 1 1 Instruments Covered by This Manual 0 0 02 0084 1 1 Required Equipment SS SS SS 1 2 2 Adjustments Introduction l l ll ll ss 2 1 Safety Consideration SS 4 4 4 SS SS 2 1 Required Equipment a A 2 1 Adjustment Tools 4 ll 4 A 2 2 Adjustable Components 4 SS SS 2 2 Factory Selected Components aoa a a a SS SS SS 2 2 EEPROM Write Protect Switch l l SS SS se 2 2 Related Adjustments EE VV VV VV 2 2 Adjustment Program SS a sn MM EN 2 8 Program Installation ME MM 2 4 Making a Working Copy MEE 2 4 Defining the Configuration EE 2 4 Program Execution SS SS SS SS 4 4 SS SS SS 2 4 Adjustments Procedure References SS SS SS SS
11. SW1 1 If closed the power on self test errors will be ignored 0000 5000 LCSOBOO Figure B 1 Jumper and Switch Settings Default Jumper and Switch Settings B 1 Index A Al Main Board Removal 3 12 A2 CPU Board Assembly Removal 3 12 A3 Ammeter Board Assembly Removal 3 13 A5 AC Inlet Board Assembly Removal 3 13 Adjustable Components 2 2 Adjustment Program 2 3 Adjustments 2 1 Adjustments Procedure References 2 6 Adjustment Tools 2 2 After Service Product Safety Checks 4 2 Ammeter Section 4 7 Analog Section 4 5 Assembly Replacement 3 1 B BNC Connector Removal 3 16 C Check Procedure References 4 12 Cover Removal 3 11 D DC Voltage Source Section 4 6 Digital Section 4 8 Disassembly Procedures 3 11 Documentation Map ix E EEPROM Write Protect Switch 2 2 F Factory Selected Components 2 2 G General Information 1 1 H How To Use This Manual ix I Instruments Covered by This Manual 1 1 Interlock Connector Removal 3 14 I V Converter 4 7 K Keyboard Assembly Removal 3 13 L LCD Assembly Removal 3 14 M Manual Changes A 1 O Ordering Information 3 1 Overall Block Diagram 4 4 Overall Measurement Theory 4 3 P Power Supply Section 4 9 Program Installation 2 4 R Reference Current Source 4 7 Related Adjustments 2 2 Replaceable Assembly List 3 2 Replaceable M
12. 1 Assembly Replacement 3 11 A1 Main Board Removal Removal Procedure 1 Remove the A2 CPU Board Assembly while referring to A2 CPU Board Assembly Removal 2 Disconnect the following cable assemblies from the Al assembly a Four cable assemblies from the front panel b The cable assembly from the transformer c Two cable assemblies from the DC DC Converter 3 Disconnect the four optical fiber cables which are connected to the A3 Ammeter Board Assembly 4 Disconnect the four optical fiber cables from the A3 Ammeter Board Assembly Caution To avoid damaging on the optical fiber cable caused by bending or other mechanical stress remove all the fiber cables from the 4339B when replacing i either the A1 board or the A3 board Remove the cable clamp on the shield case which surrounds the A3 board Remove the nut which fastens the Ext Trigger connector on the rear panel Remove the screw which secures the A1 board to the chassis side CON Oo Remove the four studs that secure the Al assembly to the chassis by rotating the studs with a flat bladed screwdriver 9 Remove the three screws that secure the Al assembly to the chassis 10 Remove the Al assembly from the chassis A2 CPU Board Assembly Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Disconnect the four flatcable assemblies and the wire assembly from the A2 board 3 Remove the four screws that secu
13. 3 8 3 8 Replaceable Mechanical Parts List b SS a SS SS SS 3 9 3 9 Replaceable Mechanical Parts List 6 N a 3 10 4 1 DC DC Converter Output Voltages Connected EE A 4 12 4 2 DC DC Converter Open Output Voltages SS SS SS SS 4 17 A 1 Manual Changes by Serial Number 2 2 2 2 2 2 5 25 2 A 1 Contents 3 General Information Introduction This chapter provides information on instruments covered by this manual and required equipment for the adjustment and troubleshooting Instruments Covered by This Manual Agilent Technologies uses a two section nine character serial number which is printed on the serial number label Figure 1 1 attached to the instrument s rear panel The first four digits and a letter are the serial number prefix and the last five digits are the suffix Agilent Technologies Japan Ltd SER NO JP1KG12345 AK MADE IN JAPAN 33 Figure 1 1 Serial Number Label 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 the instrument is different from those described in this manual The manual for this new instrument may be accompanied by a yellow Manual Changes supplement or have a different manual part number This sheet contains change information that explains how to adapt the manual to the newer instrument In a
14. Check 6 Ammeter Functionality Check MM 4 13 Check 7 CPU Power LED Lights a a a len 4 14 Check 8 Any Error Code on LED lll nn e 4 14 Check 9 CPU Fuse High Lead Voltage clic 4 15 Check 10 Fuse and Line Switch lll sn 4 15 Check 11 DC DC Converter Input Voltage 2 240 4 16 Check 12 DC DC Converter Open Output Voltages 02 4 17 Check 13 Transformer Secondary Voltage 08 4 18 A Manual Changes Introduction a a 2 ll SS SS SS a A 1 Manual Changes SS SS SS SS SS SS SS SS SS SS A 1 B Default Jumper and Switch Settings Introduction a a 2 ll SS SS SS a B 1 Jumper and Switch Settings aooaa ll l l a B 1 Index Contents 2 Figures 1 1 Serial Number Label a a a a a SS SS SS SS SS SS se 1 1 2 1 Adjustment Program Flow SS SS A 2 3 2 2 Source Voltage Adjustment Setup SS SS SS 2 6 2 3 Ammeter Adjustment Setup 1 2 a a a a a ls 2 8 2 4 Ammeter Adjustment Setup 2 2 SS e 00000004 2 9 3 1 Cover Removal 2 1 a 3 11 3 2 Cable Assembly Connection for Interlock Connector 3 15 3 3 Cable Assembly Connection for Triaxial Connector SS 3 16 4 1 Ohm sLaw 4 ll SS A 4 3 4 2 4339B Overall Block Diagram SS SS SS SS SS SS SS 4 4 4 3 Analog Section Block Diagram l l SS SS 4 5 4 4 DC Voltage Source Section Block Diagram
15. Correctly 1 Turn on the 4339B 2 Reset the 4339B 3 Check if the LCD s back light is lit 4 Press some front panel keys such as and check if the characters are correctly displayed in the whole area of the LCD 5 If the LCD operates correctly proceed to Check 4 Any Error Message on LCD otherwise replace the LCD Assembly Check 4 Any Error Message on LCD 1 Turn off the 4339B 2 Turn on the 4339B while watching the LCD 9 Check if the LCD displays any error message 4 If an error has NOT occurred replace the A1 Main Board Assembly otherwise proceed to Check 5 CPU Related Error Message Check 5 CPU Related Error Message 1 If the error message is one of the following replace the A2 CPU Board Assembly otherwise proceed to Check 6 Ammeter Functionality Check a ROM TEST FAILED b RAM TEST FAILED c EEPROM R W FAILED Note When replacing the AZ CPU Board Assembly refer to Replacing the A2 CPU i Board Assembly in Chapter 3 for handling the ROM and EEPROM on the A2 9 Assembly Check 6 Ammeter Functionality Check 1 If the error message is one of the following replace the AS Ammeter Board Assembly otherwise replace the A1 Main Board Assembly a A3 BD TEST FAIL b ADC FAILURE Troubleshooting 4 13 Check 7 CPU Power LED Lights 1 Turn on the 4339B 2 Check if the LED 5V of DS1 on the A2 CPU Board Assembly lights Refer to Figure 4 10 for DS1 location
16. The GPIB interface on the A2 Assembly allows the 4339B communicate with a controller The handler interface on the Al Assembly allows the 4339B communicate with an external handler Note Because of required high dc isolation between the A3 Assembly and other i assemblies the A3 Assembly communicates with other assemblies via optical 9 fibers The A2 CPU Board Assembly includes a processor ROM EEPROM jumpers switches and LEDSs ROM A2U11 stores the firmware which controls all the 4339B operation and functions The ROM is mounted in a socket for easy replacement EEPROM A 2U1 stores the unit unique data such as the adjustment data and the operator unique data such as the operator saved measurement setup condition The EEPROM will 4 8 Troubleshooting not lose its data when power is turned off The EEPROM is mounted in a socket for easy replacement Jumpers and switches set the 4339B conditions Refer to Appendix B for more information Power Supply Section Figure 4 7 shows the Power Supply Section block diagram Transformer 1 Main Board Assy DC DC Converter es gt 42 V A5 AC Inlet Bd Assy i r LEV m c 12V V Select mt 230 V Fi VRY DE LINE oe o o o o 2 115 V A3 Ammeter Board Assy vR2 SA NEUTRAL GROUND gt 1 I v i Figure 4 7 Power Supply Section Block Diagram 77 ra GND
17. a 3 14 Interlock Connector Removal l l een 3 14 Removal Procedure SS SS SS SS a 3 14 Triaxial Connector Removal 2 2 2 2 2 25 2 2 5 2 52 2 3 15 Removal Procedure 2 2 2 2 2 2 2 2 2 5 2 5 24 3 15 BNC Connector Removal 4 2 l l 4n 3 16 Removal Procedure SS SS A 3 16 4 Troubleshooting Introduction a SS SS 4 a 4 1 Safety Considerations ll 4 4 4 a 4 1 Required Equipment ll ll 4 4 SS SS SS SS SS 4 1 After Service Product Safety Checks len 4 2 Theory of Operation 5 2l ll ll s soos 4 3 Overall Measurement Theory lll 4 3 Overall Block Diagram s A 4 4 Analog Section ll ll e 4 4 4 4 4A n 4 5 DC Voltage Source Section 2 SS SS SS SS 4 6 Ammeter Section 2 2 2 2 2 2 4 4 4 4 SS SS SS SS 4 7 IV Converter 2 SS SS SS SS a 4 7 Reference Current Source 1 1 ee l l rn 4 7 Digital Section MEET MM 4 8 Power Supply Section o MM EN 4 9 Troubleshooting 4 ll n MM 4 10 Check Procedure References ll leen 4 12 Check 1 DC DC Converter Output Voltage 4 12 Check 2 LCD Displays Anything a a a SS SS lll rn 4 13 Check 3 LCD Operates Correctly l l rn e 4 13 Check 4 Any Error Message on LCD SS a SS 4 13 Check 5 CPU Related Error Message a u a a D 4 13
18. front bezel Remove the four screws that secure the front panel bezel to the chassis from both sides Place the front panel assembly so that the front panel faces down Remove the two screws that secure the LCD to the front panel bezel Remove the LCD assembly from the front panel bezel Interlock Connector Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Disconnect the two flatcable assemblies and the wire assembly from the front side of the A2 board 3 Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly 4 Remove the screws which fastens the cable assembly on the left front side of the chassis 5 Remove the side trim label from both sides of the front bezel 6 Remove four screws that secure the front panel bezel to the chassis from both sides 7 Place the front panel assembly so that the front panel faces down 8 Unsolder the white cable from the lug terminal for the interlock connector 9 Unscrew the nut which fasten the Interlock connector to the front panel assembly using a spanner from the back of the front panel bezel 10 Unsolder the cables from the the interlock connector 11 Remove the Interlock connector Note When soldering the cable assemblies to the Interlock connector refer to i Figure 3 2 for connection assignment between the connector pins and wire 9 color 3 14 Assembly Replacement White 7 t
19. inoperative and should be secured against any unintended operation The protection provisions will have likely been compromised if for example m The instrument shows visible signs of damage m The instrument fails to perform the intended measurement m The unit has undergone prolonged storage under unfavorable conditions m The instrument was severely stressed in transport Perform the following five safety checks to verify the safety condition of the 4339B these checks may also be used for safety checks after troubleshooting and repair 1 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 1 Q to check the resistance from the instrument enclosure to the power cord s ground pin The resistance must be less than 0 1 Q Flex the power cord while making this measurement to determine if any intermittent discontinuities exist Unplug the 4339B s power plug from the power source Set the line switch to ON Tie the line and neutral pins of the power connector together and check the resistance between them and enclosure The minimum acceptable resistance is 5 MQ Find and replace any component which causes the instrument to fail this test Verify that the correct fuse is installed 5 Make sure th
20. the current flowing through the DUT is within the user specified range Figure 4 4 shows the DC Voltage Source Section block diagram Pre regulator d Control Main Amplifier Output iy Chassis Ground Current Detector L6S04013 Figure 4 4 DC Voltage Source Section Block Diagram The Main Amplifier amplifies the reference voltage generated by DAC 1 so that the output voltage is between 0 V and 1 000 V The Pre regulator supplies a voltage to the Main Amplifier The Pre regulator voltage varies according to the output voltage in order to minimize energy consumption of the Main Amplifier The Current Detector detects the over current to reduce the output voltage so that the current is within the specified range 4 6 Troubleshooting Ammeter Section The ammeter section converts current flowing into to corresponding digital data The section includes an I V converter reference current source and the Analog to Digital Converter I V Converter Figure 4 5 shows the I V converter block diagram L5504003 Figure 4 5 I V Converter Block Diagram The I V Converter is essentially an integrator composed of an operational amplifier and a capacitor When current Ix flows into the integrator the current charges capacitor C As a result the integrator outputs a negative going ramp of wh
21. 001 RC Box Adapter No Substitute Agilent PN 04339 65005 A V Measurement Adapter No Substitute Agilent PN 04339 65006 A Shunt Connector No Substitute Agilent PN 04339 60003 A 1 Adjustment 2 Troubleshooting 3 Excluding the 9826A Note Because the 3458A is the only multimeter available which satisfies the i requirements 1 2 kV allowable de voltage as well as accuracy no substitute is Li available Table 1 2 Required Language Extensions Name Ver Name Ver Name Ver Name Ver CLOCK 5 0 EDIT 5 1 GRAPHX 5 2 MAT 5 1 CRTA 5 1 ERR 5 1 GPIB 5 0 MS 5 1 CRTX 5 1 FHPIB 5 0 IIO 5 1 PDEV 5 0 CS80 5 0 GRAPH 5 2 KBD 5 1 1 2 General Information Adjustments Introduction This chapter describes the adjustments required to ensure the 4339B is within its published specifications after it has been repaired or when it fails the performance tests The adjustments should be performed along with periodic maintenance to keep the 4339B in optimum operating condition If proper performance cannot be achieved after adjustments proceed to Chapter 4 Note To ensure proper results and correct instrument operation a 60 minute i warm up stabilization is required before performing the adjustments E Safety Consideration This chapter contains NOTES CAUTIONS and WARNINGS which must be followed to ensure operator safety and to maintain the instrument in a safe and serviceable condition The adjustmen
22. 0837 0237 1 Varistor 3 4 Assembly Replacement Replaceable Mechanical Parts List The replaceable mechanical parts are listed in Table 3 4 to Table 3 7 Table 3 4 Replaceable Mechanical Parts List 1 D MM ew Seq Abert Acra Min Max C 316 6 60 O CET EL E 8 EE EJ J EJ wet vous rr Somparetor Gampr Cort Dik Dig D cC E E 3 Be 3 5 EJ 5 Cur Key Look Raset Config Entar 5 J 9 3 o DO LAS03102 Reference Agilent Part Qty Description Designation Number 1 04339 04004 1 Cover 0363 0125 30 mm x 2 Gasket 2 5041 9167 4 Toot 1460 1345 2 Tilt Stand 3 04339 65020 1 Front Panel Assembly 4 5041 9170 2 Trim Side 0515 0914 4 Screw M3 Hidden 5 04263 40001 1 Front Bezel 6 04339 00605 1 Sub Panel Hidden 0515 0914 4 Screw M3 Hidden 7 1250 2817 1 HV BNC Connector 3 0360 1190 1 Lug Terminal Hidden 8 1250 2817 1 HV BNC Connector 3 9 1250 2817 1 HV BNC Connector 3 0360 1190 1 Lug Terminal Hidden 10 1250 2228 1 Triaxial Connector 3 11 1252 1419 1 Connector 6 pin2 45 04339 01204 1 Lug Terminal Hidden 04339 24009 1 Nut Hidden 12 04339 87122 1 Panel Label 1 The assembly consists of the parts desig
23. 3 If the LED lights proceed to Check 8 Any Error Code on LED otherwise proceed to Check 9 CPU Fuse High Lead Voltage Check 8 Any Error Code on LED 1 Turn off the 4339B 2 Turn on the 4339B while watching the LEDs on the A2 CPU Board Assembly 3 Check if the LEDs light as the sequence shown in Figure 4 10 4 If LEDs light as the sequence replace the LCD Assembly otherwise possibly HALT doesn t light or BERR lights replace the A2 CPU Board Assembly Note When replacing the A2 CPU Board Assembly refer to Replacing the A2 CPU i Board Assembly in Chapter 3 for handling the ROM and EEPROM on the A2 9 Assembly A2 CPU Board Assy Power On U LOS04009 Figure 4 10 CPU Board Assembly LED Light Sequence 4 14 Troubleshooting Check 9 CPU Fuse High Lead Voltage 1 Turn on the 4339B 2 Using a multimeter check if the dc voltage at the high lead of the fuse F1 on the GPU Board shown in Figure 4 11 is 5 0 2 V 3 If the voltage is in the range replace the A2 CPU Board Assembly otherwise replace the Al Main Board Assembly Note If the multimeter reading is correct the Fl fuse on the A2 CPU Board i Assembly is most suspicious Replacing only the fuse may fix the problem w Note When rep
24. 339 25008 1 Stud 0515 0914 1 Screw M3 Assembly Replacement 3 9 Table 3 9 Replaceable Mechanical Parts List 6 Do Reference Agilent Part Qty Description Designation Number 1 04339 40003 1 Housing 2 04339 40004 1 Housing with Nut 0515 1550 1 Screw M3 3050 0891 1 Washer 3 04339 61651 1 Cable Assembly 4 04339 60003 1 Shunt Connector 1 This part is included in the Shunt Connector Assembly 4 2 This assembly consists of the part designated by 1 through 3 3 10 Assembly Replacement Disassembly Procedures Caution SUSCEPTIBLE TO DAMAGE FROM ESD Perform the following procedures only at a static safety workstation and wear a grounding strap Tools and Fasteners The 4339B mechanical components are secured using metric threaded fasteners Many fasteners in the 4339B 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 fasteners Cover Removal The following procedure is common for gaining access to any of the assemblies Figure 3 1 Cover Removal 1 Remove the two screws which fasten the cover to the chassis s rear panel 2 Slide the cover toward rear while holding the front panel bezel as shown in Figure 3
25. Agilent 4339B High Resistance Meter Service Manual SERIAL NUMBERS This manual applies directly to instruments with serial number prefix JP1KD For additional important information about serial numbers read Instruments Covered by This Manual in Chapter 1 of this manual RE Agilent Technologies Agilent Part No 04339 90043 Printed in JAPAN March 2001 Fourth Edition Notice The information contained in this document is subject to change without notice This document contains proprietary information that is protected by copyright All 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 1996 1999 2000 2001 Manual Printing History August 1996 EE EE tent e en First Edition July 1999 Second Edition part number 04339 90043 June 2000 EE e nes Third Edition part number 04339 90043 March 2001 Ge ee ee ee ee ee Fourth Edition part number 04339 90043 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 equ
26. a 2 6 Source Voltage Adjustment SS ll SS a 2 6 Equipment SS SS SS SS SS SS SS SS SS SS 2 6 Setup a A 2 6 Ammeter Adjustment SS e 2 8 Equipment SS SS SS SS SS SS SS SS SS SS 2 8 Setup 1 2 SS A 2 8 Setup 2 2 oaa aa SS SS 2 9 3 Assembly Replacement Introduction 2 SS SS SS a 9 1 Ordering Information a SS SS SS SS SS SS SS 9 1 Restored Exchange Assemblies l l 9 1 Replacing the A2 CPU Board Assembly 2 2 2 2 2 9 2 Replaceable Assembly List 44 a 9 2 Replaceable Mechanical Parts List a a a a a a a 3 5 Disassembly Procedures ooa a a a a SS SS SS SS SS a 3 11 Tools and Fasteners ooa a a lll l l s 3 11 Cover Removal SS SS SS SS SS SS SS SS SS 3 11 Al Main Board Removal SS SS SS SS a 3 12 Removal Procedure SS SS SS SS SS SS ss SS 3 12 A2 CPU Board Assembly Removal SS SS SS SS SS 3 12 Removal Procedure SS SS SS SS SS SS ss SS 3 12 A3 Ammeter Board Assembly Removal SS SS SS SS 3 18 Removal Procedure 2 2 25 2 2 25 2 25 2 252 25 2525 2525 3 13 A5 AC Inlet Board Assembly Removal e 3 18 Removal Procedure 2 2 25 2 2 25 2 25 2 252 25 2525 2525 3 13 Contents 1 Keyboard Assembly Removal SS SS SS SS SS 3 13 Removal Procedure SS SS SS SS SS SS SS 3 13 LCD Assembly Removal SS SS SS 3 14 Removal Procedure SS SS SS SS
27. al Manual Changes To adapt this manual to your 4339B refer to Table A 1 and make all of the manual changes listed opposite your instrument s serial number Instruments manufactured after the printing of this manual may be different from 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 1 it may be documented in a yellow MANUAL CHANGES supplement For additional information on serial number coverage refer to 4339B Operation manual Table A 1 Manual Changes by Serial Number Serial Prefix Make Manual Changes or Number There are no earlier configurations than the printing date of this manual Manual Changes A 1 Default Jumper and Switch Settings Introduction This appendix describes the setting of the jumpers and switches on the A2 CPU Board Assembly Use this information when replacing the A2 Assembly Jumper and Switch Settings Figure B 1 shows the default Jumper and Switch Settings When the A2 CPU Board Assembly is replaced set the jumpers and switches to the default side as shown in the figure A2 CPU Board Assembly ea
28. al cable sheilds external noise and improves the contact check function accuracy The current flows into the I V Converter in the ammeter section via the contact check transformer As discussed in I V Converter the I V Converter converts current flowing into to voltage ramp The normalization amplifier enhances the number of measurement range and of measurement speed selection with fewer range capacitors The I V converter output voltage slope which is proportional to the converter input current is determined by the difference between two voltage measurement results in a certain time interval The result current is converted to digital data by the ADC and transferred to the CPU section by optical fiber links DC Voltage Source Secti Front Panel Outpu me Ammeter Section Contact N lizati Check ormaliza ion Transformer purer x1 x5 Reference Current Source P Contact Check Signal Detector mm Optical Fiber L8S04005 Figure 4 3 Analog Section Block Diagram Troubleshooting 4 5 DC Voltage Source Section The voltage source generates a dc voltage ranging from O V to 1 000 V The voltage setting resolution is 0 1 V when the output is less than and equal to 200 V and 1 V when the output is greater than 200 V The current limit function controls the source output voltage so that
29. asurement Adapter post using the red lead of the Banana Banana Jumper 2 Connect the 3458A INPUT LO post to the V Measurement Adapter Ground post using the black lead of the Banana Banana Jumper 3 Set the V Measurement Adapter s switches as follows Table 2 2 V Measurement Adapter Switch Settings ID 12 4 Output O 1 e 1 Disable o Connect the Shunt Connector directly to the 4339B s Ground and Guard connectors Connect the V Measurement Adapter s Output cable to the 4339B Output connector Connect the V Measurement Adapter s Interlock cable to the 4339B Interlock connector 1 0 OD Ha Set the V Measurement Adapter s Interlock Switch Output to Enable Adjustments 2 7 Ammeter Adjustment This adjustment updates the ammeter related and voltage source related adjustment data stored in the EEPROM This adjustment consists of two setups Equipment Multimeter 3458A RC Box 16340A Dual Banana BNC m Cable Agilent PN 11001 60001 RC Box Adapter Agilent PN 04339 65005 Setup 1 2 This setup obtains the voltage source output resistance and the ammeter scaling factors 4339B Computer ngnona E 80 0000 a adODAOOODOOO VK LET oooagaaoaao EG Dual Banana BNC m Cable
30. at power on Return the switch to the OPEN position when the adjustments have been completed Refer to Figure B 1 for the switch location Adjustments 2 5 Adjustments Procedure References This section provides supplemental information for the adjustments which are performed by the program Connection instructions and some additional explanations are provided Use this chapter as a reference when you perform the adjustments Source Voltage Adjustment This adjustment updates the voltage source adjustment data stored in the EEPROM Equipment Multimeter 3458A Banana Banana Jumper 11058A V Measurement Adapter Agilent PN 04339 65006 Shunt Connector Agilent PN 04339 60003 Warning To avoid the electrical shock hazard by eventual touch use only the A 11058A for connection Each of the jumper s banana plug conductor is equipped with an retractive protective sleeve Setup This setup obtains the data to adjust the actual source output voltage equal to the set value 4339B Computer E oojoooo u egdaaaaasuasan QORR ogaoaoboogooao lao 0000 Shunt Connector V Measurement Adapter Banana Banana Jumper Figure 2 2 Source Voltage Adjustment Setup 2 6 Adjustments Perform the following steps as the program instructs 1 Connect the 3458A INPUT HI post to the V Me
31. at the grounding wire green yellow is secured to the chassis by a screw and washer 4 2 Troubleshooting Theory of Operation This section describes the overall operation of the 4339B and the operation of each assembly Overall Measurement Theory The 4339B measures the resistance of the Device Under Test DUT in the following manner Figure 4 1 Ohm s Law In Figure 4 1 a DUT is connected in series with test voltage source V and ammeter A If the ammeter measures I amperes when the source voltage is V the DUT s resistance R is expressed by when ignoring r V RE This eguation shows that if the DUT resistance R is extremely high the current flowing the circuit is extremely low For example if R 1 GQ and V 1 V the current flowing is 1 nA 10 A The 4339B High Resistance Meter is essentially a set of a voltage source and a very sensitive current meter Note In practice ammeter input resistance r which is approximately 1 kQ decreases i the current flowing through the DUT The actual current I flowing through the 9 DUT R is expressed by V I R r In the current measurement mode the 4339B displays the actual current I for the measurement result For example if R 100 kQ and V 1 V the measurement result will be 9 9 wA x 7 5 rather than 10 HA tgz In the resistance measurement mode on the other hand the 4339B displays the derived DUT resistanc
32. ddition 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 Agilent Technologies recommends that you periodically request the latest Manual Changes supplement The supplement for this manual is identified by this manual s printing date and its part number both of which appear on the manual s title page Complimentary copies of the supplement are available from Agilent Technologies If the serial prefix or number of an instrument is lower than that on the title page of this manual see Appendix A Manual Changes For information concerning a serial number prefix that is not listed on the title page or in the Manual Change supplement contact the nearest Agilent Technologies office General Information 1 1 Required Equipment Table 1 1 lists the required equipment for adjusting and troubleshooting the 4339B Table 1 2 lists the required language extensions to be used with the adjustment program Table 1 1 Required Equipment Equipment Requirements Recommended Model Qty Use Multimeter No Substitute 3458A Al T RC Box No Substitute 16340A A Computer No Substitute HP 9000 series 200 or 300 A RAM gt 4M bytes Operating System BASIC 5 1 or higher 98616A A Adjustment Program No substitute Agilent PN 04339 65008 A Cable Banana Banana Jumper 11058A A Dual Banana BNC m Cable Agilent PN 11001 60
33. devices use anti static handling procedures to prevent electrostatic discharge damage to component Caution risk of electric shock Terminals which may be supplied from the interior of the equipment at a voltage exceeding 1 kV or allow connection to a voltage exceeding 1 kV are marked with this symbol Documentation Map Operation Manual Operation Manual Agilent Part Number 04339 90050 for English edition 04339 97050 for Japanese edition explains specifications basic measurement explanations and how to verify conformance to published specifications Service Manual Service Manual Agilent Part Number 04339 90043 explains how to adjust troubleshoot and repair the 4339B How To Use This Manual This is the Service Manual for the 4339B High Resistance Meter This manual contains adjustments and repair information and consists of the following four chapters Chapter 1 General Information Chapter gives general information for servicing the 4339B This chapter lists the recommended equipment for adjustments and troubleshooting Chapter 2 Adjustments Chapter 2 describes the adjustments required to ensure that the 4339B is within its published specifications after it has been repaired or it fails the performance tests Chapter 3 Assembly Replacement Chapter 3 provides the information on replacing the 4339B assemblies The information includes replaceable assembly lists and removal and installation procedures
34. e chassis 4 Remove the four screws that secure the A5 board to the chassis 5 Remove the A5 board from the chassis Keyboard Assembly Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Disconnect the two flatcable assemblies and the wire assembly from the front side of the A2 board 3 Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly Remove the screws which fastens the cable assembly on the left front side of the chassis Remove the side trim label from both sides of the front bezel Remove the four screws that secure the front panel bezel to the chassis from both sides Place the front panel assembly so that the front panel faces down Remove the wire assembly from the keyboard co ON 0 Cc A Remove the screw that secures the keyboard to the front panel bezel 10 Remove the keyboard assembly from the front panel bezel Assembly Replacement 3 13 LCD Assembly Removal Removal Procedure 1 2 o 00 N OG OU Ha Remove the cover while referring to Cover Removal Disconnect the two flatcable assemblies and the wire assembly from the front side of the A2 board Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly Remove the screws which fastens the cable assembly on the left front side of the chassis Remove the side trim label from both sides of the
35. e replaceable parts lists Note The Exchange Program may not apply in your country Contact the nearest i Agilent Technologies office for further details Li Assembly Replacement 3 1 Replacing the A2 CPU Board Assembly The A2 CPU Board Assembly has a ROM for the firmware and an EEPROM for the adjustment data and user data Both ROM and EEPROM are mounted in sockets for easy replacement If the A2 assembly is replaced the ROM and EEPROM may be transferred from the defective assembly to the new assembly as long as the ROM and EEPROM are not defective The ROM transfer reduces parts cost for the repair and the EEPROM transfer saves time from readjusting the 4339B For this purpose the A2 assembly can only be ordered without the ROM When the A2 assembly is replaced make sure that the jumpers and switches on the A2 assembly are in the default position as shown in Appendix B Replaceable Assembly List The replaceable electrical assemblies are listed in Table 3 1 and Table 3 3 3 2 Assembly Replacement Table 3 1 Replaceable Major Assembly List LA003101 Reference Agilent Part Qty Description Designation Number 1 04339 60002 1 Transformer 2 04339 66505 1 A5 AC Inlet Board Assembly 3 04263 80901 1 DC DC Converter Unit 4 04339 66501 1 A
36. e which coincides with the DUT resistance In other words the 4339B shows the resistance calculated by Re ter For example if R 100 kQ and V 1 V the measurement result will be 100 kQ even the actual current flowing through the DUT thus through the ammeter with r is 9 9 pA Troubleshooting 4 3 Overall Block Diagram Figure 4 2 shows the overall block diagram of the 4339B I V Converter Keyboard Voltage Source V Measurement Voltage L5 04002 Figure 4 2 4339B Overall Block Diagram The voltage source applies dc voltage which is set from the keyboard or by an GPIB command The I V converter which is directly connected to the input converts the current flowing into to a voltage ramp of which slope is proportional to the input current The CPU calculates the current from the voltage ramp slope then calculates the DUT resistance by dividing the source voltage by the current 4 4 Troubleshooting Analog Section Figure 4 3 shows the analog section block diagram The 4339B analog section can be divided in two sections the dc voltage source section and the ammeter section The de voltage source section applies measurement voltage to the series circuit consisting of the DUT and I V Converter The DUT is connected to the 4339B Input connector by a triaxial cable which is a three layered coaxial cable This triaxi
37. echanical Parts List 3 5 Replacing A2 CPU Board Assembly 3 2 Required Equipment 1 2 Restored Exchange Assemblies 3 1 S Source Voltage Adjustment 2 6 T Theory of Operation 4 3 Tools and Fasteners 3 11 Triaxial Connector Removal 3 15 Troubleshooting 4 10 Index 1
38. eyboard Assembly None 1 If the EEPROM A2U1 is replaced all adjustments are required 2 2 Adjustments Adjustment Program The adjustment program listed in Table 1 1 is reguired for the adjustments Using the program the computer controls the 4339B and the other pieces of equipment to obtain the adjustment data and stores the data in the 4339B s internal EEPROM A2UI The adjustment program runs on the computer listed in Table 1 1 The program should be installed into your computer according to the procedure described in Program Installation To start the program after it has been installed refer to Program Execution Figure 2 1 shows the adjustment program flow The following lists the brief explanation for each menu item At the end of each adjustment the program writes the obtained adjustment data both to the 4339B internal EEPROM and to the unit serial number dependent file on the disk Main Me Source Ammeter Rewrite UP Voltage Adjustment Adjustment PROM Y Y Y Y Main Menu Main Menu Main Menu Main Menu L S02001 Figure 2 1 Adjustment Program Flow INITIAL SETUP defines the standards calibration values Update the calibration values as necessary Source Voltage obtains the data to adjust the actual source output voltage equal Adjustment to the set value This adjustment should be performed if the
39. ich slope is E The current Ix can be obtained by C A where At is a certain time interval and Av is the output voltage drop for this interval Capacitor C which is called range capacitor determines the applicable measurement range in a practical integrator Reference Current Source The Reference Current Source is an internal current reference which provides the I V converter with some sets of pre defined de currents The source is used for the power on self test sequence and for the calibration function Troubleshooting 4 7 Digital Section Figure 4 6 shows the Digital Section block diagram A2 CPU Board Assy HOSSAOOHA A Board SSY Optical Fiber Keyboard A3 Assy Ammeter Board Assy L5S04006 Figure 4 6 Digital Section Block Diagram The digital section consists of the A2 CPU Board Assembly and other peripheral assemblies such as the keyboard and LCD The section communicates with the Al Main Board Assembly in order to control the latches switches and other components on the Al Assembly and receive the measurement data For the same purpose the A2 Assembly also communicates with the A3 Ammeter Assembly via the Al Assembly and four optical fibers
40. ied 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 is expressed or implied Agilent Technologies specifically disclaims the implied warranties of merchantability and fitness for a particular purpose vi Exclusive Remedies The remedies provided herein are buyer s sole and exclusi
41. ipment 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 Note 4339B is designed for use in INSTALLATION CATEGORY II according to IEC i 61010 1 and POLLUTION DEGREE 1 according to IEC 61010 1 and IEC 60664 1 9 4339B is an INDOOR USE product Note LEDs in 4339B are Class 1 in accordance with IEC60825 1 i CLASS 1 LED PRODUCT 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 before touching them DO NOT Service Or Adjust Alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscita
42. l Main Board Assembly 04339 69501 Al Main Board Assembly Exchange Assembly 5 04263 66532 1 A2 CPU Board Assembly w o ROM 04263 00604 1 Case Shield 0515 1550 4 Screw M3 04339 00612 1 Insulator 0460 0616 70 mm Adhesive Tape for Insulator 6 04339 66504 1 A4 Keyboard Assembly 04339 25151 1 Rubber Key 0515 1550 1 Screw M3 7 04263 61010 1 LCD 04263 25003 1 Filter Transparent 0515 1550 2 Screw M3 8 04339 66503 1 A3 Ammeter Board Assembly 04339 69503 A3 Ammeter Board Assembly Exchange Assembly 92 04263 80901 1 DC DC Converter Unit 1 Included in 04263 66532 2 Included in A3 Ammeter Board Assembly 8 Assembly Replacement 3 3 Table 3 2 A2 CPU Board Assembly Replaceable Assembly List did A gau 6550 Reference Agilent Part Qty Description Designation Number 1 2110 1123 1 A2F1 Fuse SMT 2 A 2 1818 5146 1 A2U1 EEPROM 3 04339 85071 1 A2U11 ROM Rev 1 04 Table 3 3 Replaceable Assembly List Reference Agilent Part Qty Description Designation Number A1C500 0180 4334 1 Capacitor 22000 F for power supply A1C501 0180 4334 1 Capacitor 22000 F for power supply A38C500 0180 4334 1 Capacitor 22000 pF ASSWI1 3101 3173 1 Line Switch ADSW2 3101 3156 1 Voltage Selection Switch ABVRI 0837 0237 1 Varistor A5VR2
43. lacing the A2 CPU Board Assembly refer to Replacing the A2 CPU i Board Assembly in Chapter 3 for handling the ROM and EEPROM on the A2 9 Assembly A2 CPU Board Assy LCS04010 Figure 4 11 Location of High Lead of A2F1 Fuse Check 10 Fuse and Line Switch 1 Check that the fuse on the 4339B rear panel is not blown 2 Check that the line switch on the A5 AC Inlet Board Assembly is not defective 3 If passed proceed to Check 11 DC DC Converter Input Voltage otherwise replace the defective line switch or blown fuse Troubleshooting 4 15 Check 11 DC DC Converter Input Voltage 1 Turn on the 4339B 2 Using a multimeter check if the voltage between TP4 and TP3 DC DC Converter input voltage on Al Assembly is between 12 V and 15 Vde Refer to Figure 4 12 for the test pad locations 3 If the voltage is in the range proceed to the Check 12 DC DC Converter Open Output Voltages otherwise proceed to the Check 13 Transformer Secondary Voltage TP3 GND TP4 DC OUT
44. nated by 5 through 12 and cables connected to the all connectors on the front panel 2 This part is included in the Front Panel Assembly 3 3 Includes washer and nut 4 Includes washer 5 Furnished nut cannot be used Assembly Replacement 3 5 Table 3 5 Replaceable Mechanical Parts List 2 O CAUTION For Continued protection ag the same inst le parts 1 LINE Fuse 50 60Hz Voltage 45VA Max tm T O2SA D o Do IE Selector m TOSA ev LOS L5 03003 Reference Agilent Part Qty Description Designation Number 1 04339 61697 1 GPIB Connector with flatcable 2 0515 1551 2 Screw M3 3 2110 0565 1 Fuse Holder 2110 0202 1 Fuse 0 25 A Slow Blow 230V 2110 0201 Fuse 0 5 A Slow Blow 115V 4 04339 00103 1 Chassis 5 2190 0054 1 Washer 2950 0054 1 Nut 1 Includes two sets of screw washer and nut 3 6 Assembly Replacement Table 3 6 Replaceable Mechanical Parts List 8 D LASO3004 2 3 4 5 6 7 10
45. o Lug Terminal Interlock Connector Solder Side View orange Yellow L5503002 Figure 3 2 Cable Assembly Connection for Interlock Connector Triaxial Connector Removal Caution When accessing the traiaxial connector use lint free gloves to avoid contaminating the connector Agilent Technologies supplies lint free gloves i Agilent PN 9300 0163 Removal Procedure 1 2 oo N OG OU A 10 11 12 13 Remove the cover while referring to Cover Removal Disconnect the two flatcable assemblies and the wire assembly from the front side of the A2 board Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly Remove the screws which fastens the cable assembly on the left front side of the chassis Remove the side trim label from both sides of the front bezel Remove the four screws that secure the front panel bezel to the chassis from both sides Place the front panel assembly so that the front panel faces down Disconnect the cable assembly which includes a core from the front side of the AS Ammeter board assembly Remove the core holder which holds the cable assembly disconnected in the last procedure by unscrewing the screw which secures the holder from the front side Unsolder the diodes from the sleeve of the triaxial connector Remove the heat shrink tube from the triaxial connector Unsolder the sleeve from the
46. re the A2 board to the stud 4 Remove the A2 board from the chassis Note The ROM and EEPROM on the A2 assembly may be transferred to the new i assembly to minimize the repair time and parts cost Refer to Replacing the 9 A2 CPU Board Assembly for more information 3 12 Assembly Replacement A3 Ammeter Board Assembly Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Disconnect the cable assembly connected to the transformer assembly from the A3 board 3 Disconnect the four optical fiber cables from the A3 board 4 Disconnect the four optical fiber cables from the A1 Main Board Assembly Caution To avoid damaging on the optical fiber cable caused by bending or other mechanical stress remove all the fiber cables from the 4339B when replacing i either the A1 board or the A3 board Disconnect the cable assembly which includes a core from the front of the A3 board Remove the screw which fasten the cable assembly on the front of the A3 board Remove four screws that secure the A3 board to the chassis CON Oo Remove the A3 board from the chassis A5 AC Inlet Board Assembly Removal Removal Procedure 1 Remove the cover while referring to Cover Removal 2 Disconnect the 4 pin connector cable assembly from the A5 board 9 Remove the screw which fixes the green and yellow wire connected to the neutral terminal of the power cable connector to the bottom of th
47. sconnect the Dual Banana BNC m cable from the RC Box Adapter s Monitor H connector 2 Connect the Dual Banana BNC m cable to the RC Box Adapter s Monitor L connector Adjustments 2 9 Assembly Replacement Introduction This chapter provides the 4339B replaceable parts lists and the step by step disassembly procedures for the major assemblies Table 3 1 to Table 3 9 describe all the 4339B replaceable parts The figure sections of Table 3 7 and Table 3 8 also shows the connections Ordering Information To order a part listed in the replaceable parts lists quote the Agilent Technologies part number indicate the quantity required and address the order to the nearest Agilent Technologies office To order a part that is not listed in the replaceable parts list include the instrument model number complete instrument serial number the description and function of the part and the quantity of parts required Address the order to the nearest Agilent Technologies office Restored Exchange Assemblies Some replacement assemblies are available as either new or restored assemblies The restored assembly is more economical than a new assembly and as with new assemblies a 90 day warranty applies through the instrument s support life The defective assembly must be returned for credit For this reason new assemblies must be ordered for spare parts The part numbers for both new and restored assemblies are given in th
48. the equipment configuration has changed Refer to the following procedure to define the configuration 1 Turn on the computer and bring up the BASIC system 2 Set the Mass Storage Unit Specifier to the drive directory where the adjustment program exists using the MSI command 3 Load the TE_A4339B file from the adjustment program disk by pressing LOAD TE_A4339B Return or Enter 4 Run the loaded program by pressing RUN 5 As the program instructs enter the default GPIB address of the Multimeter Note Once the default GPIB address of the Multimeter is set it cannot be changed i unless the configuration is redefined Li Program Execution Perform the following steps to start the adjustment program Note Install the program prior to execution Refer to Program Installation Y 1 Turn on the computer and bring up the BASIC system Refer to the Table 1 2 for the required language extensions 2 Set the Mass Storage Unit Specifier to the drive directory where the adjustment program exists using the MSI command 3 Load the program ADJ4339B by pressing LOAD ADJ4339B Return or Enter 4 Execute the loaded program by pressing RUN 24 Adjustments In the program the 4339B is referred as UUT Li Note If the adjustments being performed follow right after EEPROM replacement i change switch A2SW1 1 to CLOSE so that the 4339B will ignore the self test errors
49. tion 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 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 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 specif
50. triaxial connector Unsolder the coaxial cable from the triaxial connector Unscrew the nut which fastens the triaxial connector to the sub panel Assembly Replacement 3 15 14 Remove the triaxial connector Note When soldering the cable assembly to the triaxial connector refer to Figure 3 3 i and carefully solder the cable to the connector so that the center conductor 9 and the outer shield are not shorted to each other Heat Shrink Tube Sleeve Solder L503008 Heat Shrink Tube sleeve Heat Shrink Tube Solder Figure 3 3 Cable Assembly Connection for Triaxial Connector BNC Connector Removal Removal Procedure Caution When accessing the BNC connector use lint free gloves to avoid contaminating the connector Agilent Technologies supplies lint free gloves i Agilent PN 9300 0163 1 Remove the cover while referring to Cover Removal 2 Disconnect the two flatcable assemblies and the wire assembly from the front side of the A2 board 3 Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly o ON OU A Remove the screws which fastens the cable assembly on the left front side of the chassis Remove the side trim label from both sides of the front bezel Remove the four screws that secure the front panel bezel to the chassis from both sides Place the front panel assembly so that the front panel faces down
51. ts covered in this chapter should be performed only by a qualified person who is aware of the hazards Warning Any interruption of the protective ground conductor inside or outside A the instrument or disconnection of the protective ground terminal can make the instrument dangerous Intentional interruption of the protective ground system for any reason is prohibited Required Equipment Table 1 1 lists the equipment required to perform the adjustments Use only calibrated equipment when adjusting the 4339B Adjustments 2 1 Adjustment Tools No hand tools are required for the adjustments Adjustable Components There are no adjustable components such as variable capacitors or variable resistors in the 4339B All adjustments are performed by updating the adjustment data stored in the internal EEPROM Factory Selected Components No factory selected components are used in the 4339B EEPROM Write Protect Switch There are no EEPROM write protect switches in the 4339B Related Adjustments There are two adjustments for the 4339B Table 2 1 lists the adjustments that must be performed if an assembly has been replaced Table 2 1 Related Adjustments Assembly Replaced Required Adjustment Al Main Board Assembly All adjustments A2 CPU Board Assy without ROM None A3 Ammeter Board Assembly Ammeter Adjustment A5 AC Inlet Board Assembly None LCD Assembly None DC DC Converter Unit None K
52. ure 4 8 shows the overall troubleshooting flowchart to find the defective assembly Follow the flowchart when troubleshooting Refer to the Check Procedure References for detailed procedure to check each item Refer to Chapter 3 for assembly replacement Note Because of each assembly s high SMD surface mount device ratio the repair i should be done by assembly replacement The troubleshooting procedure 9 therefore only isolates the defective assembly 4 10 Troubleshooting pe2eldei eq o Ajquessy A Asepuooes JOWIOJSUBAL Eb 9949 leMeAUOo 20 29 LL Y99490 eui pue esna OL 42849 UIEIN LY leleuuy ey A Peel ysy LYOOUD 1eleuuy esn fido yoo 9 1949 Auoo 90 94 jndino uedo Auoo 20 30 ob 49942 A Indyno yes Auo OA od HISUO 1HVLS iebesseu 041e pelelei Nd g Y99YO aol uo ess w 10419 Auy Apa0 Q31 4emod sejeJodo 97 fido 4 28490 9949 6ulyyAue skeldsip ao1 amp Y99490 ssed LASO4007 Figure 4 8 Troubleshooting Flow Troubleshooting 4 11 Check Procedure References Refer to the corresponding check procedure Each check procedure is numbered the same as in Figure 4 8 for quick reference Check 1 DC DC Converter Output Voltage 1 Remove the cover referring to Cover Removal in Chapter 3 2 Turn on the 4339B 3 Using a multimeter check to see if the voltages between the test pads TPs sho
53. ve 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 vii Safety Symbols General definitions of safety symbols used on eguipment or in manuals are listed below AN MS O Warning Caution i Note ug ZN viii Instruction manual symbol the product is marked with this symbol when it is necessary for the user to refer to the instruction manual Alternating current Direct current On Supply Off Supply This Warning sign denotes a hazard It calls attention to a procedure practice condition or the like which if not correctly performed or adhered to could result in injury or death to personnel This Caution sign denotes a hazard It calls attention to a procedure practice condition or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Note denotes important information It calls attention to a procedure practice condition or the like which is essential to highlight Affixed to product containing static sensitive
54. wn in Figure 4 9 on Al Main Board Assembly are in the ranges listed in Table 4 1 4 If passed proceed to Check 2 LCD Displays Anything otherwise proceed to Check 10 Fuse and Line Switch COM GND LASO400S Figure 4 9 DC DC Converter Output Voltage Check Table 4 1 DC DC Converter Output Voltages Connected Test Pad Test Pad Range 9 5 8 GND 5 10 2 V 7 12 5 COM 120 6 V 6 12 5 COM 12 0 6 V 4 12 Troubleshooting Check 2 LCD Displays Anything 1 Turn off the 4339B 2 Turn on the 4339B while watching the LCD 3 Check for a beep sound for a moment and if you see anything is displayed on the LCD 4 If beep sounds and LCD displays something proceed to Check 3 LCD Operates Correctly otherwise proceed to Check 7 CPU Power LED Lights Check 3 LCD Operates
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