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Keysight N6705, Service Manual

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Keysight N6705 Service Manual Download Page 92

4    Disassembly 

92 

Model N6705 Service Guide 

Removing/Installing the Bulk Supply 

Step 1. Remove the top chassis, PPMC PCA, Bias PCA, and AC Module 
as previously described. 

Step 2. Remove one screw using a T10 driver from the rear panel. 

 

Figure 4-17 

 

Step 3. Unhook the cable tie and remove four screws using a T20 driver. 

 

 

Figure 4-18 

Summary of Contents for N6705

Page 1: ...Service Guide Keysight N6705 DC Power Analyzer ...

Page 2: ...s of these rights customarily provided to the public to use modify reproduce release perform display or disclose commercial computer software or commercial computer software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer soft...

Page 3: ...rvice trained personnel who are aware of the hazards involved should remove instrument covers Always disconnect the power cable and any external circuits before removing the instrument cover Do Not Modify the Instrument Do not install substitute parts or perform any unauthorized modification to the product Return the product to a Keysight Sales and Service Office for service and repair to ensure t...

Page 4: ...cedure Models N676xA 53 Calibration Procedure Models N678xA SMU 62 Calibration Procedure Models N6783A BDA and MFG 76 Change the Admin Calibration Password 80 4 Disassembly 81 Electrostatic Discharge ESD Precautions 82 Disassembly Procedures 82 5 Troubleshooting 105 Preliminary Checkout 106 General Troubleshooting 107 Bias PCA Troubleshooting 112 Backplane PCA Troubleshooting 114 Calibration and P...

Page 5: ...logies for repair or replacement Refer to the following note NOTE You can contact Keysight Technologies at one of the following telephone numbers for warranty service or technical support information In the United States 800 829 4444 In Europe 31 20 547 2111 In Japan 0120 421 345 Or use our Web link for information on contacting Keysight in your country or specific location www keysight com find a...

Page 6: ...e unit is to be shipped to Keysight Technologies for service or repair be sure to Attach a tag to the unit identifying the owner and indicating the required service or repair Include the model and serial number Place the unit in its original container with the appropriate packaging material and secure the container with strong tape or metal bands If the original shipping container is not available...

Page 7: ...ng steps 1 Download and unzip the Keysight N6705 Firmware Update file located under Documents Downloads at the bottom of the Web page Make a note of where you saved the unzipped file 2 Download and install the Keysight N6705 Firmware Update Utility located under Documents Downloads at the bottom of the Web page Skip this step if the utility is already installed 3 Run the Keysight N6705 Firmware Up...

Page 8: ......

Page 9: ...g within its calibration limits and does not need to be re calibrated Verification procedures perform two primary functions Performance Tests These tests verify that the DC Power Analyzer is operating normally and meets the specifications published in the Keysight N6700 Modular Power System Family Specifications Guide Calibration Tests These tests verify that the DC Power Analyzer is operating wit...

Page 10: ... 1 8W verification calibration for N678xA SMU 1 MΩ 1 1 8W verification calibration for N678xA SMU Vishay NH 250 25Ω 1 Vishay NH 250 4Ω 1 Electronic Load 150 V 50 A minimum with transient capability and a slew rate of 833 kA s or better Keysight N3300A mainframe with N330xA modules Keysight N6784A Load for N678xA SMU and N6783A set to CC load mode Keysight N6784A GPIB Controller Full GPIB capabilit...

Page 11: ...he use of a variable load capable of dissipating the required power If a variable resistor is used switches should be used to connect disconnect or short the load resistor For most tests an electronic load can be used The electronic load is considerably easier to use than load resistors but it may not be fast enough to test transient recovery time and may be too noisy for the noise PARD tests Fixe...

Page 12: ...rrent shunt DC voltmeter Electronic load or resistor 50 50 output 50 ohm termination input BNC BNC BNC Install jumpers from sense to output terminals Enable 4 wire sense Press Settings then select Advanced Select 4 wire Disable 4 wire sense LED indicator is off C 1 2 AUX VOLTAGE MEASUREMENT External DC power supply DC voltmeter E Electronic load DC voltmeter F Disable 4 wire sense LED indicator is...

Page 13: ...n the test record form under Voltage Programming Readback High Voltage 5 Record the output voltage reading from the DMM and the voltage measured over the interface The readings should be within the limits specified in the test record form for the appropriate model under Voltage Programming Readback High Voltage 6 For models N6761A N6762A N6781A N6782A and N6784A only Set both the voltage programmi...

Page 14: ...e CV Source Effect all models except N678xA SMU Test category performance This test measures the change in output voltage that results from a change in AC line voltage from the minimum to maximum value within the line voltage specifications 1 Turn off the DC Power Analyzer and connect the ac power line through a variable voltage transformer or an AC source 2 Connect a DMM and an electronic load se...

Page 15: ...oscope 4 Set the differential amplifier to multiply by ten divide by one and 1 MΩ input resistance The positive and negative inputs of the differential amplifier should be set to AC coupling Set the oscilloscope s time base to 5 ms div and the vertical scale to 10 mV div Turn the bandwidth limit on usually 20 or 30 MHz and set the sampling mode to peak detect 5 Program the DC Power Analyzer to the...

Page 16: ...ure 7 The output voltage should return to within the specified voltage at the specified time following the 50 load change Check both loading and unloading transients by triggering on the positive and negative slope Record the voltage at time t in the performance test record form under Transient Response Transient Recovery Time N678xA SMU and N6783A only Test category performance This test measures...

Page 17: ...epeat steps 3 through 5 for the 20 V range Program the instrument settings as described on the test record form under Transient Response 20 V Change the settings of the N6784A that is being used as the load as follows b Voltage limit 20 4 V e Load pulse properties N678xA I0 0 1 A I1 0 9A T0 1ms T1 1ms T2 1ms Auxiliary Voltage Measurement Accuracy N6781A N6785A only Test category performance This t...

Page 18: ...inimum Current 4 Program the instrument settings as described in the test record form under Current Programming Readback High Current 5 Divide the voltage drop DMM reading across the current shunt by the shunt resistance to convert to amps and record this value Iout Also record the current reading measured over the interface The readings should be within the limits specified in the test record for...

Page 19: ... 10 mA range Current Iout 11 Steps 11 and 12 for models N6781A N6782A N6784A N6785A and N6786A only Connect the Keysight 3458A in series with a 10 Ω resistor to the output see Test Setup D Set the Keysight 3458A to measure current using the 100 mA range Set the current measurement to the 100 mA range Set the instrument as described under Current Readback 100 mA Range Record the current reading of ...

Page 20: ...ss the current monitoring resistor by its resistance to convert to amps and record this value Iout The difference in the current readings in steps 4 and 5 is the load effect which should not exceed the value listed in the test record for the appropriate model under CC Load Effect 6 For models N6781A and N6782A only Repeat steps 2 through 5 for the 1 A range and the 300 mA range 7 For model N6784A ...

Page 21: ...his is the voltage with no load Vnl 3 Program the output resistance to 1 ohm Turn on the electronic load Select CC mode current 1 A Input On 4 Record the voltage reading on the DMM This is the voltage with a load Vwl Record the current reading on the front panel of the DC Power Analyzer This is the current with a load Iwl 5 Calculate the resistance value as follows R Vnl Vwl Iwl This is the output...

Page 22: ...N6731B N6741B 80 mV 100 mV 100 mV 125 mV __________ __________ __________ __________ 80 mV 100 mV 100 mV 125 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6731B N6741B N6731B N6741B 40 mA Iout 20 mA 9 965 A 19 95 A Iout 35 mA Iout 50 mA __________ __________ __________ _______...

Page 23: ...________ __________ __________ __________ 80 mV 100 mV 100 mV 125 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6732B N6742B N6732B N6742B 20 mA Iout 10 mA 6 2206 A 12 46 A Iout 19 37 mA Iout 29 mA __________ __________ __________ __________ __________ __________ 60 mA Iout 10...

Page 24: ...__________ 200 mV 300 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6733B N6743B N6733B N6743B 10 mA Iout 5 mA 2 4762 A 4 9725 A Iout 8 75 mA Iout 12 5 mA __________ __________ __________ __________ __________ __________ 30 mA Iout 5 mA 2 5237 A 5 0275 A Iout 8 75 mA Iout 12 5...

Page 25: ..._ __________ 200 mV 300 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6734B N6744B N6734B N6744B 15 mA Iout 4 mA 1 47775 A 2 9755 A Iout 6 25 mA Iout 8 5 mA __________ __________ __________ __________ __________ __________ 25 mA Iout 4 mA 1 52225 A 3 0245 A Iout 6 25 mA Iout 8...

Page 26: ... __________ __________ 400 mV 500 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6735B N6745B N6735B N6745B 17 5 mA Iout 4 mA 0 7788 A 1 5776 A Iout 5 2 mA Iout 6 4 mA __________ __________ __________ __________ __________ __________ 22 5 mA Iout 4 mA 0 8212 A 1 6224 A Iout 5 2...

Page 27: ... __________ __________ 500 mV 1000 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6736B N6746B N6736B N6746B 8 5 mA Iout 2 mA 0 4893 A 0 9885 A Iout 2 75 mA Iout 3 5 mA __________ __________ __________ __________ __________ __________ 11 5 mA Iout 2 mA 0 5107 A 1 0115 A Iout 2 ...

Page 28: ...6752A 75 mV 125 mV __________ __________ 75 mV 125 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6751A N6752A N6751A N6752A 10 mA Iout 4 mA 4 975 A 9 970 A Iout 9 mA Iout 14 mA __________ __________ __________ __________ __________ __________ 30 mA Iout 4 mA 5 025 A 10 030 A I...

Page 29: ...e at 100 µs w Option 760 761 Both Both 30 mV 200 mV __________ __________ 30 mV 200 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both Both Both 20 mA Iout 30 mA 49 920 A Iout 80 mA __________ __________ __________ __________ 80 mA Iout 30 mA 50 080 A Iout 80 mA CC Load Effect Both ...

Page 30: ...oth Both 90 mV 350 mV __________ __________ 90 mV 350 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6754A N6756A N6754A N6756A 8 mA Iout 8 mA 19 968 A 16 071 A Iout 28 mA Iout 25 mA __________ __________ __________ __________ 32 mA Iout 8 mA 20 032 A 17 029 A Iout 28 mA Iout 2...

Page 31: ...t 160 µA 1 4992 A 2 9986 A Iout 0 76 mA Iout 1 36 mA __________ __________ __________ __________ __________ __________ 1 2 mA Iout 160 µA 1 5008 A 3 0014 A Iout 0 76 mA Iout 1 36 mA Current Prog Readback Low Range Low Current Full Scale Iout Current measured over interface Both Both 0 099930 A Iout 45 µA __________ __________ 0 100070 A Iout 45 µA Current Readback 200 µA Range 100µA current measur...

Page 32: ...mV __________ __________ 30 mV 200 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both Both Both 35 mA Iout 60 mA 49 935 A Iout 60 mA __________ __________ __________ __________ 65 mA Iout 60 mA 50 065 A Iout 60 mA Current Readback Low Range Current measured over interface Both Iout ...

Page 33: ...stant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both N6764A N6766A N6764A N6766A 16 mA Iout 5 mA 19 981 A 16 9833 A Iout 25 mA Iout 22 mA __________ __________ __________ __________ __________ __________ 24 mA Iout 5 mA 20 019 A 17 0167 A Iout 25 mA Iout 22 mA Current Readback Low Range Cur...

Page 34: ...20 mV 3 mV Transient Response Voltage at 250 µs Voltage at 250 µs w Option 760 761 300 mV 350 mV __________ __________ 300 mV 350 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface 30 mA Iout 15 mA 14 9175 A Iout 37 5 mA __________ __________ __________ __________ 90 mA Iout 15 mA 15 0825 A I...

Page 35: ... 5 mV Transient Response Voltage at 250 µs Voltage at 250 µs w Option 760 761 300 mV 350 mV __________ __________ 300 mV 350 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface 45 mA Iout 12 mA 8 42725 A Iout 24 75 mA __________ __________ __________ __________ 75 mA Iout 12 mA 8 57275 A Iout ...

Page 36: ...ms N A N A __________ __________ 35 mV 9 mV Transient Response Voltage at 250 µs 500 mV __________ 500 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface 52 5 mA Iout 12 mA 4 9325 A Iout 19 5 mA __________ __________ __________ __________ 67 5 mA Iout 12 mA 5 0675 A Iout 19 5 mA CC Load Effec...

Page 37: ...N A N A __________ __________ 45 mV 18 mV Transient Response Voltage at 250 µs 1000 mV __________ 1000 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface 25 5 mA Iout 6 mA 2 9655 A Iout 10 5 mA __________ __________ __________ __________ 34 5 mA Iout 6 mA 3 0345 A Iout 10 5 mA CC Load Effect ...

Page 38: ... peak rms N A N A __________ __________ 68 mV 27 mV Transient Response Voltage at 250 µs 2 0 V __________ 2 0 V Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface 27 mA Iout 6 mA 1 967 A Iout 9 mA __________ __________ __________ __________ 33 mA Iout 6 mA 2 033 A Iout 9 mA CC Load Effect 6 mA _...

Page 39: ... 6 V output range rms 6 V output range All All All All N A N A N A N A __________ __________ __________ __________ 12 mV 1 2 mV 12 mV 1 2 mV Transient Response 6 V output range at 35 µs 20 V output range at 35 µs All All 20 mV 10 mV __________ __________ 20 mV 10 mV Auxiliary Voltage Readback N6781A Vout 10 mV __________ Vout 10 mV Constant Current Tests Current Programming Readback Minimum Curren...

Page 40: ...e Voltage Priority 100 mV 3 A CV Ripple and Noise 20 V range Voltage Priority 20 V 1 A CV Ripple and Noise 6 V range Voltage Priority 6 V 3 A Transient Response 6 V range Voltage Priority Comp HIGH3 6V from 0 1 to 1 5 A Transient Response 20 V range Voltage Priority Comp HIGH3 20V from 0 1 to 0 9 A Current Programming Readback Min Current Current Priority 0 A 6 V Current Programming Readback High ...

Page 41: ... 5 mA 7 9953 A Iout 4 7 mA __________ __________ __________ __________ 1 5 mA Iout 1 5 mA 8 0047 A Iout 4 7 mA 100 mA and 1 mA Readback 100 mA range measured over interface 1 mA range measured over interface when installed in N6705A mainframe Both Both Iout 35 μA Iout 350 nA Iout 360 nA __________ __________ _________ Iout 35 μA Iout 350 nA Iout 360 nA CC Load Effect Both 400 μA __________ 400 μA ...

Page 42: ...__ __________ 75 mV 90 mV Constant Current Tests Current Programming Readback Minimum Current Iout Current measured over interface High Current Iout Current measured over interface Both Both Both Both 3 2 mA Iout 0 6 mA 2 9952 A Iout 3 6 mA __________ __________ __________ __________ 6 8 mA Iout 0 6 mA 3 0048 A Iout 3 6 mA Current Readback Low Range Current measured over interface Both Iout 225 µA...

Page 43: ...er the front panel or a controller over the GPIB Refer to the Equipment Required section in chapter 2 for a list of the equipment required for calibration Also refer to Measurement Techniques for information about connecting the voltmeter and current shunt NOTE Perform the verification tests before calibrating your DC Power Analyzer If the DC Power Analyzer passes the verification tests the unit i...

Page 44: ... given In some steps it may take up to 30 seconds for OPC to respond Once started you must perform the complete calibration procedure in its entirety As each calibration section is completed the instrument calculates new calibration constants and begins using them However these constants are not saved in nonvolatile memory until a SAVE command is explicitly given Exit the calibration mode either b...

Page 45: ...s off B Current shunt Keysight 3458A configured as a voltmeter Disable 4 wire sense LED indicator is off Keysight 3458A configured as a voltmeter Enable 4 wire sense Press Settings then select Advanced Select 4 wire D Keysight 3458A configured as an ammeter Disable 4 wire sense LED indicator is off Electronic load F Disable 4 wire sense LED indicator is off Keysight 3458A configured as a voltmeter...

Page 46: ... voltage of the range that you are calibrating The following example selects the 60 V full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Voltage High Range Prog and Meas Then select Start CAL VOLT 60 1 Step 3 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically ...

Page 47: ...ect the full scale current programming range The value to program a range must be the maximum current of the range The following example selects the 5 A full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Current High Range Prog and Meas Then select Start CAL CURR 5 1 Step 3 Select the first current calibration point Fron...

Page 48: ... enter a calibration date CAL DATE date 1 Save and Log out of Calibration Mode CAUTION Storing calibration constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants do not Save the data when you exit the calibration mode The calibration will then remain unchanged Front Panel SCPI Command From the Calibration menu select Save T...

Page 49: ...tage of the range that you are calibrating This example selects the 50 V full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Voltage High Range Prog and Meas Then select Start CAL VOLT 50 1 Step 3 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically selected Ente...

Page 50: ...OLT CMRR 1 OPC After calibration completes disconnect all jumpers and resistors Current Calibration High Range Programming and Measurement The output voltage may go negative at some point during this procedure on units that have polarity reversal relays Option 760 Step 1 Connect a precision shunt resistor to the output The shunt resistor should be able to measure at least 120 of the output s full ...

Page 51: ... calibration point 2nd calibration point N6751A N6752A 25 Ω resistor do not use electronic load 4 Ω resistor do not use electronic load N6753A Electronic load set to 26 25A CC mode 0 6 Ω equivalent including lead resistance Electronic load set to 13 12A CC mode 1 2 Ω equivalent including lead resistance N6754A Electronic load set to 10 5A CC mode 3 8 Ω equivalent including lead resistance Electron...

Page 52: ...ront Panel SCPI Command From the Calibration menu select Date Enter the date in the format yyyy mm dd Then select Insert Date Then select Close To enter a calibration date CAL DATE date 1 Save and Log out of Calibration Mode CAUTION Storing calibration constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants do not Save the d...

Page 53: ... of the Keysight 3458A to an output channel see Cal Setup A Step 2 Select the full scale voltage programming and measurement range The value entered must be the maximum voltage of the range that you are calibrating This example selects the 50 V full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Voltage High Range Prog an...

Page 54: ...e range to be calibrated This example selects the 5 V range of output 1 Front Panel SCPI Command From the Calibration menu select Voltage Low Range Programming Then select Start CAL VOLT 5 1 Step 2 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 3 Measure the out...

Page 55: ...T MEAS 5 1 Step 2 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 3 Measure the output voltage with the DMM and enter the data Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next CAL DATA data Step 4 Select the ...

Page 56: ...ocedure on units that have polarity reversal relays Option 760 Step 1 Connect a precision shunt resistor to the output The shunt resistor should be able to measure at least 120 of the output s full scale current see Cal Setup B Connect the Keysight 3458A across the shunt resistor Step 2 Select the full scale current programming range The value to program a range must be the maximum current of the ...

Page 57: ...elect Current Low Range Programming Then select Start CAL CURR 0 1 1 Step 3 Select the first current calibration point Wait a minimum of 5 minutes for the output current to stabilize Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 4 Measure the current with the Keysight 3458A and enter the value Front Pan...

Page 58: ...models N6761A and N6762A Select Next Enter measured current should be displayed CAL LEV P1 Step 4 Measure the current with the Keysight 3458A and enter the value Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next If calibration is complete select Close CAL DATA data OPC Steps 5 and 6 only apply to models N6761A and N6762A Step 5 Disconnect the K...

Page 59: ... CAL DATA data OPC Peak Current Limit Calibration Note that for models N6763A through N6766A the peak current limit calibration is valid for 5 years Step 1 Connect only the electronic load or equivalent resistor up to 500W rating across the output terminals for the first calibration point Model 1st calibration point 2nd calibration point N6761A N6762A 25 Ω resistor do not use electronic load 4 Ω r...

Page 60: ...mer Calibration Step 1 Remove all loads from the output This procedure is automatic and takes a few seconds Front Panel SCPI Command From the Calibration menu select Miscellaneous Downprogrammer Select Start Then select Close CAL DPRog 1 OPC Enter a Calibration Date Front Panel SCPI Command From the Calibration menu select Date Enter the date in the format yyyy mm dd Then select Insert Date Then s...

Page 61: ...nd From the Calibration menu select Save Then select Save Calibration for all Outputs Select Close Go Back to the Administrative tools menu and select Administrator Login Select Logout then Close To save calibration data CAL SAVE To exit calibration mode CAL STAT OFF ...

Page 62: ...ximum voltage of the range that you are calibrating This example selects the 20 V full scale range of output 1 Front Panel SCPI Command From the Calibration menu select Voltage High Range Prog and Meas Then select Start CAL VOLT 20 1 Step 3 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be disp...

Page 63: ...xternal DMM into the data field and then select Next When calibration is complete select Close CAL DATA data Low Range Voltage Programming Models N6781A N6782A N6784A Step 1 Select the low voltage programming range The value entered must be the maximum voltage of the range to be calibrated This example selects the 6 V range of output 1 Front Panel SCPI Command From the Calibration menu select Volt...

Page 64: ...tive range Front Panel SCPI Command The third calibration point is automatically selected Enter P3 measured data should be displayed CAL LEV P3 OPC Step 8 Measure the output voltage with the DMM and enter the data The value should be negative Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next When calibration is complete select Close CAL DATA da...

Page 65: ...nter the data Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next When calibration is complete select Close CAL DATA data Step 6 only applies to models N6781A and N6782A Step 6 Repeat steps 1 through 5 for the 100 mV range Steps 7 through 9 only apply to model N6784A Step 7 Select the third voltage calibration point for the negative range Front P...

Page 66: ...is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 3 Measure the output voltage with the DMM and enter the data Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next CAL DATA data Step 4 Select the second voltage calibration point Front Panel SCPI Command The second calibration point is automatically selected E...

Page 67: ...Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next CAL DATA data Step 5 Select the second voltage calibration point Front Panel SCPI Command The second calibration point is automatically selected Enter P2 measured data should be displayed CAL LEV P2 OPC Step 6 Measure the output voltage with the DMM and enter the data Front Panel SCPI Command En...

Page 68: ...t Start For N6785A N6786A CAL CURR 8 1 For N6781A N6782A N6784A CAL CURR 3 1 Step 3 Select the first current calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 4 Calculate the shunt current I V R and enter the data This value may be positive or negative Front Panel SCPI Command Enter the ca...

Page 69: ...lect the low current programming range The value to program a range must be the maximum current of the range Models N6781A and N6782A have 300 mA range Model N6784A has a 100 mA and a 10 mA range This example selects the 300 mA programming range of output 1 For model N6784A select the 100 mA programming range Front Panel SCPI Command From the Calibration menu select Current Low Range Programming T...

Page 70: ... should be negative Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next When calibration is complete select Close CAL DATA data Step 9 Repeat steps 1 through 8 for the 10 mA programming range of model N6784A 100 mA Measurement Range All Models Step 1 Connect only the current measurement terminals of the Keysight 3458A to the output terminals see ...

Page 71: ... resistor to the output see equipment list in chapter 2 and Cal Setup D Step 2 Select the 1 mA range of output 1 Front Panel SCPI Command From the Calibration menu select Current I mA Measurement Range Select Start CAL CURR MEAS 0 001 1 Step 3 Select the first current calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be d...

Page 72: ...ect Start CAL CURR MEAS 0 00001 1 Step 3 Select the first current calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 4 Measure the current with the Keysight 3458A and enter the value Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next CAL ...

Page 73: ...OS 3 1 For N6785A N6786A CAL CURR LIM NEG 8 1 Step 3 Select the first current calibration point Front Panel SCPI Command The first calibration point is automatically selected Enter P1 measured data should be displayed CAL LEV P1 OPC Step 4 Calculate the shunt current I V R and enter the data Front Panel SCPI Command Enter the calculated value into the data field and then select Next CAL DATA data ...

Page 74: ... the external DMM into the data field and then select Next CAL DATA data Step 5 Select the second resistance calibration point Front Panel SCPI Command The second calibration point is automatically selected Enter P2 measured data should be displayed CAL LEV P2 OPC Step 6 Measure the output voltage with the DMM and enter the data Front Panel SCPI Command Enter the value from the external DMM into t...

Page 75: ...on constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants do not Save the data when you exit the calibration mode The calibration will then remain unchanged Front Panel SCPI Command From the Calibration menu select Save Then select Save Calibration for all Outputs Select Close Go Back to the Administrative tools menu and se...

Page 76: ... voltage of the range that you are calibrating The following example selects the 6 V full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Voltage High Range Prog and Meas Then select Start CAL VOLT 6 1 Step 3 Select the first voltage calibration point Front Panel SCPI Command The first calibration point is automatically se...

Page 77: ...ect the full scale current programming range The value to program a range must be the maximum current of the range The following example selects the 3 A full scale range of output 1 Full scale ranges vary according to model Front Panel SCPI Command From the Calibration menu select Current High Range Prog and Meas Then select Start CAL CURR 3 1 Step 3 Select the first current calibration point Fron...

Page 78: ...3 Select the first current calibration point Front Panel SCPI Command The first calibration point is automatically selected The ammeter should be connected Select Next Enter Measured Current should be displayed CAL LEV P1 OPC Step 4 Measure the current with the Keysight 3458A and enter the value Front Panel SCPI Command Enter the value from the external DMM into the data field and then select Next...

Page 79: ...value from the external DMM into the data field and then select Next When calibration is complete select Close CAL DATA data Enter a Calibration Date Front Panel SCPI Command From the Calibration menu select Date Enter the date in the format yyyy mm dd Then select Insert Date Then select Close To enter a calibration date CAL DATE date 1 Save and Log out of Calibration Mode CAUTION Storing calibrat...

Page 80: ...turned the switches to the normal position you can access the Administrative Tools menu with the new password Front Panel SCPI Command Press Menu then select Utilities Administrative Tools Administrator Login Enter the original password or zero if the switches have been set in the Password field and press Select In the Administrative Tools menu select Change Password Enter the new password in the ...

Page 81: ...isassembly Electrostatic Discharge ESD Precautions 82 Disassembly Procedures 82 This chapter discusses the disassembly procedures for troubleshooting and repairing Keysight N6705 DC Power Analyzer mainframes ...

Page 82: ...s in original static free packaging Remove all plastic foam vinyl paper and other static generating materials from the immediate work area Disassembly Procedures WARNING SHOCK HAZARD FAN HAZARD Turn off the mainframe and disconnect its power cord before attempting any of the following procedures Required Disassembly Tools Tool Use T10 Torx driver All Disassemblies T20 Torx driver Removing Top Chas...

Page 83: ...her end of the module Grasp the module at the ends near the fan and the output connector and lift it straight up out of the mainframe Step 3 Install the power modules Align the module over the pins and push it down onto the connector Using a T10 Torx driver install the two screws at each end of the module Turn the unit upside down to install more modules Figure 4 2 NOTE If you are installing a dou...

Page 84: ...bottom covers Slide the top or bottom cover into place and tighten the thumbscrews Removing Installing Flat Flexible Cables FFC Note the position of the conductive side of the FFC cable for re installation The blue tab is on the non conductive side of the cable To remove the FFC cable gently lift up on the tabs located on the short ends of the plastic connector until the cable is released Remove t...

Page 85: ...r detailed Calibration procedures CAUTION Do not use a pencil to move the switches Any graphite dust that accumulates on the switches will conduct electricity Switches 1 and 2 set the calibration configuration as follows Switch 1 Switch 2 Description Normal DOWN DOWN This is the default or as shipped switch setting The calibration functions are accessible after entering a numeric password The defa...

Page 86: ...at temperatures above 40 degrees C The part number of the battery is Panasonic CR 2032 Step 1 Remove the top cover Loosen the thumbscrews to remove the top cover The battery is located right behind the front panel assembly Step 2 Lift the clip and remove the battery Use a small flat blade screwdriver and carefully lift the clip Remove the battery Step 3 Install the new battery Insert the new batte...

Page 87: ...quires a T20 driver see Figure 4 7 The other side panel requires a Philips pozidrive head see Figure 4 8 There is also a screw T10 that needs to be removed from the rear of each side panel Figure 4 7 Right Side Panel Figure 4 8 Left Side Panel Step 3 Remove three screws using a T10 driver from the rear panel Figure 4 9 Step 4 Remove three screws using a T10 driver from the front panel sub assembly...

Page 88: ...he top chassis Angle the top chassis so you can maneuver around the fin attached to the rear panel To completely disconnect the top chassis unwrap the front panel cable harnesses from the ferrite cores Figure 4 12 Step 7 To install the top chassis perform steps 1 6 in reverse order Be sure to tuck all cables in before replacing the top chassis ...

Page 89: ...nstalling the Bias PCA Step 1 Remove the top chassis as previously described Step 2 Remove three screws using a T10 driver and disconnect five cables Figure 4 13 Step 3 Remove the bias PCA Step 4 To install the bias PCA perform steps 1 3 in reverse order ...

Page 90: ...erface PCA Step 1 Remove the top chassis as previously described Step 2 Disconnect the eight cables and remove six screws using a T10 driver Figure 4 14 Step 3 Remove the PPMC PCA by sliding forward and lifting Step 4 To install the PPMC PCA perform steps 1 3 in reverse order ...

Page 91: ...bed Step 2 Remove the screw using a T10 driver from the rear panel located beneath the AC receptacle Figure 4 15 Step 3 Disconnect the two connections and remove two screws using a T20 driver from the AC Module grey brown Figure 4 16 Step 4 Remove the AC Module Step 5 To install the AC Module perform steps 1 4 in reverse order ...

Page 92: ...ng the Bulk Supply Step 1 Remove the top chassis PPMC PCA Bias PCA and AC Module as previously described Step 2 Remove one screw using a T10 driver from the rear panel Figure 4 17 Step 3 Unhook the cable tie and remove four screws using a T20 driver Figure 4 18 ...

Page 93: ... the sides of the bulk shroud and remove the bulk shroud Figure 4 19 Figure 4 20 Step 5 Disconnect four connections and remove two 11 32 in nuts from the bulk supply grey brown green Figure 4 21 Step 6 Remove the bulk supply Step 7 To install the bulk supply perform steps 1 6 in reverse order ...

Page 94: ...lling the Trigger Assembly Step 1 Remove the top chassis as previously described Step 2 Remove the two 5 8 in nuts from the binding posts Figure 4 22 Step 3 Remove the trigger assembly Step 4 To install the trigger assembly perform steps 1 3 in reverse order ...

Page 95: ...er from the chassis on the side opposite to the backplane PCA Figure 4 23 Step 3 Disconnect any remaining cables if required and either cut or carefully slide the two push on retainers off of the retaining pins Figure 4 24 Step 4 Remove the top backplane PCA Step 5 To install the top backplane PCA perform steps 1 4 in reverse order New push on retainers can be purchased separately ...

Page 96: ...assis as previously described Step 2 Remove bottom cover as previously described Step 3 Remove two screws using a T10 driver from the back panel one to the AC module and the other to the bulk shroud Figure 4 25 Step 4 Disconnect seven cables from the PPMC PCA and the two contacts to the AC module Figure 4 26 ...

Page 97: ...oards removed for clarity Figure 4 27 Boards removed for clarity Step 6 Gently lift bulk shroud out of mainframe and place on right side of mainframe non handle side right side when viewed from front Step 7 Carefully stand mainframe on its right end and remove three screws using a T10 driver from the side opposite to the backplane assembly Figure 4 28 ...

Page 98: ...cables if required and either cut or carefully slide the two push on retainers off of the retaining pins Figure 4 29 Step 9 Remove the backplane PCA Step 10 To install the bottom backplane PCA perform steps 1 9 in reverse order New push on retainers can be purchases separately ...

Page 99: ...p 1 Remove the top chassis as previously described Step 2 Remove the bottom cover as previously described Step 3 Remove three screws using a T10 driver from the rear panel and remove the rear panel Figure 4 30 Step 4 Disconnect the USB Cable and front panel to PPMC FFC Figure 4 31 ...

Page 100: ... the rear bottom chassis remove three screws using a T10 driver and separate mainframe from front panel Figure 4 32 Step 6 Remove two screws using a T10 from each side of the front panel Figure 4 33 Step 7 Remove the sub panel Step 8 To install the sub panel perform steps 1 7 in reverse order ...

Page 101: ... sub panel as previously described Step 2 Disconnect two cables and remove two screws using a T10 driver Figure 4 34 Step 3 Disconnect one cable and remove four screws using a T10 driver to remove display from bracket Figure 4 35 Step 4 To install the display perform steps 1 3 in reverse order ...

Page 102: ...p 1 Remove the sub panel as previously described Step 2 Disconnect the binding post PCA to front panel PCA ribbon cable and remove sixteen 1 4 in nuts from the assembly Figure 4 36 Step 3 Remove the binding post PCA Step 4 To install the binding post PCA perform steps 1 3 in reverse order ...

Page 103: ... 2 Remove the display as previously described Step 3 Disconnect the binding post PCA to front panel PCA ribbon cable and remove seven screws using a T10 driver Figure 4 37 Step 4 Remove the seven knobs from the front panel Figure 4 38 Step 5 Remove the front panel PCA Step 6 To install the front panel PCA perform steps 1 5 in reverse order ...

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Page 105: ...chapter If the Keysight N6705 DC Power Analyzer passes selftest and there are no obvious faults perform the verification procedures in chapter 2 to determine if any power modules are not calibrated or are not operating properly This will help isolate a problem to a specific power module The following table documents the test equipment required for troubleshooting Keysight N6705 DC Power Analyzer m...

Page 106: ...he following table documents the self test error messages Refer to Appendix A for other error messages Selftest Errors these errors set Standard Event Status register bit 3 202 Selftest Fail Aux Adc 0 expected n1 to n2 measured n3 chan n4 Auxiliary ADC failed n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 0 expected...

Page 107: ...he Bulk Supply and the AC Plug 3 Check power from the Bulk Supply 4 Replace Bulk Supply NO YES Is display on 1 Check ribbon cable between Front Panel Assembly and PPMC Assembly 2 Replace Front Panel Assembly 3 Go to Bias Assembly troubleshooting 4 Check display cabling 5 Replace inverter 6 Replace display NO YES Does a single output fail 1 Exchange Output Module 2 Go to Bias Assembly troubleshooti...

Page 108: ...ed mode 1 Calibrate Output Module 2 Replace Output Module Is protection falsely tripping 1 Check to ensure that protection condition is not present 2 Replace Output Module YES YES NO NO C Can t calibrate one output 1 Update firmware 2 Check calibration switches on Trigger Assembly 3 Replace Output Module Can t calibrate all modules 1 Check jumpers on Trigger Assembly 2 Reset password using jumpers...

Page 109: ...ll wires are connected to the back of the module 2 Check relays on Binding Post Assembly 3 Replace Binding Post Assembly 4 Replace Output Module Does keypad work 1 Replace keypad 2 Replace Front Panel Assembly Is unit making more noise than normal 1 Check fans on the Output Module 2 Troubleshoot Bias Assembly 3 Check Bulk Supply Digital connector fails 1 Replace PPMC Assembly YES NO YES YES YES YE...

Page 110: ...Check that the speaker is enabled in the settings 2 Replace Front Panel Assembly 1 Check power allocation settings 2 Check to ensure latest firmware is installed 3 Replace module with known working module and see if issue persists 4 Replace bulk supply 1 Replace Bulk Supply 2 Troubleshoot Bias Assembly 3 Troubleshoot Backplane Assembly YES NO YES YES YES YES NO NO NO NO E Is the clock correct 1 Se...

Page 111: ...Replace the PPMC Assembly NO YES Is the trigger in trigger out working 1 Check cable to Trigger Assembly 2 Replace Trigger Assembly 3 Replace PPMC Assembly NO YES Are all ordered options working correctly 1 Check if the data log feature is enabled 2 Upgrade to the newest firmware NO YES Are Front Panel LEDs not working 1 Replace Front Panel Assembly YES NO Are knobs working 1 Check Front Panel Ass...

Page 112: ...it could be caused by a defect in the power module or interface board that is pulling the bias voltage low Test Point Location Voltage Action TP 1 RED 48 V Output of bulk supply If not present replace the bulk supply TP 2 C4 12 V If biases at TP 2 TP 3 or TP 4 are not present disconnect the backplane and interface board cable assemblies and recheck If biases are still not present replace the bias ...

Page 113: ...ng Sheet 1 Start Bias Assembly Troubleshooting Getting 48V from Bulk Supply Replace Bulk Supply Is 12V bias present Is 3 3V bias present Is 5V bias present Replace Bias Assembly Replace Bias Assembly Replace Bias Assembly End Bias Assembly Troubleshooting YES NO YES YES YES NO NO NO ...

Page 114: ...e Assembly Troubleshooting Inspect the pins on the connector Any missing pins Any bent pins Any cracks in solder Inspect soldering around connector End Backplane Troubleshooting Procedures 1 Replace Backplane Assembly 1 Try to straighten pin 2 Replace Backplane Assembly 1 Re solder connector 2 Replace Backplane Assembly YES YES YES NO NO NO ...

Page 115: ... Refer to the User s Guide for information on setting the calibration password as well as the Admin menu password Initialization The power system s model number serial number and other constants that are required to program the instrument are stored in an EEPROM on the PPMC PCA board If this board is replaced the instrument must be re initialized To initialize the power system you must send the fo...

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Page 117: ...117 6 Replaceable Parts Parts List 118 Parts Location Diagrams 120 The following table documents the replaceable assembles and parts The diagrams show the location of the parts ...

Page 118: ... 7 54801 47402 54801 47402 18 mm grey knob qty 2 8 E3631 20011 E3631 20011 Red biding post qty 8 9 E3631 20012 E3631 20012 Black binding post qty 8 10 3101 4076 3101 4076 AC switch 11 54810 03702 54810 03702 Tilt stand 12 54810 61001 54810 61001 Foot assembly qty 4 13 5002 2851 5002 2897 Rear panel 14 5002 2852 5002 2852 Sub panel 15 1253 7050 1253 7050 AC plug 16 5002 2850 5002 2850 Chassis top 1...

Page 119: ... 48 5185 8825 5185 8825 Filter to line switch cable 49 D8104 61602 D8104 61602 Front panel USB cable 50 N A 5067 4385 2 Auxiliary Voltage PCA 51 N A 9170 2264 4 Front panel cable inductor 52 N A 0400 1009 4 Rear panel cable grommet Handle Assembly and Label 42 E4400 40018 E4400 40018 End cap 43 E6601 21033 E6601 21033 Handle retainer 44 N6705 60002 N6705 60002 Strap handle 45 N6705 60003 N6705 600...

Page 120: ...6 Replaceable Parts 120 Model N6705 Service Guide Parts Location Diagrams Figure 6 1 External Parts ...

Page 121: ...Replaceable Parts 6 Model N6705 Service Guide 121 Figure 6 2 Top Cover Removed ...

Page 122: ...6 Replaceable Parts 122 Model N6705 Service Guide Figure 6 3 Top Chassis Removed ...

Page 123: ...Replaceable Parts 6 Model N6705 Service Guide 123 Figure 6 4 Front Panel Figure 6 5 Handle Assembly ...

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Page 125: ...ying Error Messages 126 Error List 126 This appendix gives the error numbers and descriptions that are returned by the Keysight N6705 DC Power Analyzer Error messages can be displayed on the front panel and also read back programmatically ...

Page 126: ...on mode is locked out by the calibration switch 104 Bad sequence of calibration commands Calibration commands have not been entered in the proper sequence 105 Unexpected output current The measured output current is outside the acceptable range 106 Zero measurement out of range error The zero measurement value is outside the acceptable range 107 Programming cal constants out of range The programme...

Page 127: ...ment is presently running the backup previous version of the firmware 209 Modules do not match group NV config One or more modules that have their output coupled do not match the instrument state settings 210 Frame NVRAM error A non volatile RAM error has occurred in the mainframe 211 Output state couple modules do not match One or more modules in the group does not match the non volatile configur...

Page 128: ...ot match data format One or more power modules does not match the data format of the file that is being loaded 322 User defined arb error An error has occurred in the format or the data of the user defined arb 323 Meas TINTerval too small on too many channels The measurement time interval is too small to be supported by the number of channels 324 Inconsistent arb settings The arb settings are inco...

Page 129: ...ing leading zeros 128 Numeric data not allowed A numeric parameter was received but a character string was expected 130 Suffix error Generic suffix error 131 Invalid suffix A suffix was incorrectly specified for a numeric parameter 134 Suffix too long The suffix contains more than 12 characters 138 Suffix not allowed A suffix is not supported for this command 140 Character data error Generic chara...

Page 130: ...data element was received that contains more data than the instrument can handle 224 Illegal parameter value An exact value was expected but not received 225 Out of memory The device has insufficient memory to perform the requested operation 226 Lists not same length One or more lists are not the same length 230 Data corrupt or stale Possible invalid data A new reading was started but not complete...

Page 131: ...3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 0 expected n1 to n2 measured n3 chan n4 Both voltage and current DACs are at zero n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 1 expected n1 to n2 measured n3 chan n4 Voltage DAC is at zero current DAC is at full scale n...

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Page 133: ...itches 44 85 voltage programming and measurement 46 49 53 61 75 Caution 3 CC load effect 19 source effect 20 contact numbers 5 current monitoring resistor 11 programming accuracy 18 readback accuracy 18 CV load effect 14 noise 15 source effect 14 D disassembly 82 83 AC module 91 bias PCA 89 binding post PCA 102 bottom backplane PCA 96 bulk supply 92 display 101 front panel PCA 103 parts location 1...

Page 134: ...ackaging 6 replaceable parts location 120 returning units 6 S safety 3 selftest errors 106 sub panel removing installing 99 T top chassis removing installing 87 transient recovery time 16 trigger assembly removing installing 94 troubleshooting backplane PCA 114 bias PCA 112 general 107 V verification 22 equipment 10 procedure 13 18 voltage programming accuracy 13 readback accuracy 13 W Warning 3 W...

Page 135: ...This information is subject to change without notice Keysight Technologies 2007 2015 Printed in Malaysia Edition 10 January 2015 N6705 90010 N6705 90010 www keysight com ...

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