Page 2: Safety Information
The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent...
Page 3 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 instructions when properly installed on that instrument. Agilent Technologies does not warrant that the operation of the...
Page 4 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
Page 5: Ordering Information
In this manual… Chapter 1 Troubleshooting the Analyzer Provides step-by-step instructions for isolating most failures to the faulty assembly Chapter 2 Adjusting the Analyzer Provides step-by-step instructions for adjusting the analyzer Chapter 3 Replacing Assemblies Provides step-by-step instructions to follow before and after replacing an assembly.
Page 6 Notation Conventions Before you use this book, it is important to understand the types of keys on the front panel of the analyzer and how they are denoted in this book. Hardkeys Hardkeys are front-panel buttons whose functions are always the same.
Page 7 Numeric Entries Numeric values may be entered by using the numeric keys in the lower right hand ENTRY area of the analyzer front panel. In this book, values which are to be entered from these keys are indicted only as numerals in the text, like this: Press 50, [ enter Ghosted Softkeys...
Page 8 The Agilent 89410A at a Glance viii...
Page 9 Agilent 89410A Front Panel 1-A softkey’s function changes as different menus are displayed. Its current function is determined by the video label to its left, on the analyzer’s screen. -The analyzer’s screen is divided into two main areas. The menu area, a narrow column at the screen’s right edge, displays softkey labels.
Page 10 75 ohms, or 1 megohm. For easy of upgrading, the CHANNEL 2 BNC connector is installed even if option AY7 (second input channel) is not installed. For more details on the Agilent 89410A front panel, display the online help topic ‘’Front Panel.’’ Before applying power Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety precautions are taken.
Page 11 international regulations. Table 1 defines the symbols and markings you may find in a manual or on an instrument. Table 1 Safety symbols and instrument markings Safety symbols Warning: risk of electric shock. Warning: hot surface Caution: refer to accompanying documents. Laser radiation symbol: marked on products that have a laser output.
Page 12 Table 1 Safety symbols and instrument markings (continued) Safety symbols The CSA mark is a registered trademark of the Canadian Standards Association. The C-tick mark is a registered trademark of the Spectrum Management Agency of Australia. This signifies compliance with the Australian EMC Framework regulations under the terms of the Radio Communications Act of 1992.
Page 13 Any adjustment, maintenance, or repair of this product must be performed by qualified personnel. Contact your customer engineer through your local Agilent Technologies Service Center. You can find a list of local service representatives on the Web at: http://www.agilent.com/ services/English/index.html If you do not have access to the Internet, one of these centers can direct you to your nearest representative.
Page 15: Table Of Contents
Contents 1. Troubleshooting the Analyzer How to troubleshoot the analyzer ..........1-8 To perform initial verification .
Page 16 Contents 4. Replaceable Parts Ordering Information ............4-4 Assemblies .
Page 17 Contents A90 and A91 Motherboards ...........6-16 A101 Disk Drive .
Page 18 Contents xviii...
Page 19: Troubleshooting The Analyzer
Troubleshooting the Analyzer...
Page 20 Troubleshooting the Analyzer How to troubleshoot the analyzer, page 1-8 To perform initial verification, page 1-10 To troubleshoot the power supply, page 1-15 To troubleshoot display failures, page 1-25 To perform self tests, page 1-32 To troubleshoot self-test lockup failures, page 1-48 To troubleshoot intermittent failures, page 1-52 To troubleshoot performance test failures, page 1-58 To troubleshoot front-end control failures, page 1-60...
Page 21 Safety Considerations The Agilent 89410A DC-10 MHz Vector Signal Analyzer is a Safety Class 1 instrument (provided with a protective earth terminal). Although the instrument has been designed in accordance with international safety...
Page 22: Assemblies
Troubleshooting the Analyzer CAUTION: Do not connect or disconnect ribbon cables with the power switch set to on ( l ). Power transients caused by connecting or disconnecting a cable can damage circuit assemblies. Equipment Required The following table lists the recommended equipment needed to adjust and troubleshoot the analyzer.
Page 23: Cables
Troubleshooting the Analyzer Recommended Test Equipment (continued) Logic Probe TTL/CMOS Agilent 545A Alternate Agilent 5006A Agilent 5005A/B Bandwidth ≥150 MHz Oscilloscope Agilent 54111D Vertical sensitivity 10 mV/div Input coupling AC, DC, 50 Ω, 1 MΩ Trigger Ext, Int Input R ≥1 MΩ Oscilloscope Probe Agilent 10438A Division Ratio 1:1...
Page 24 Troubleshooting the Analyzer Suggested Assembly for Series Resistor The following is a suggested assembly for the 10 kW series resistor. The 10 kΩ series resistor is required for the Input Offset adjustment. Cut resistor leads to 12 mm on each end. Solder one resistor lead to the center conductor of the BNC female connector.
Page 25 Troubleshooting the Analyzer Logic levels in this chapter are either TTL level high or TTL level low unless stated otherwise. Toggling signal levels continually change from one TTL level to the other. Configure a logic probe with an external bias supply for testing digital signals.
Page 26: How To Troubleshoot The Analyzer
Troubleshooting the Analyzer How to troubleshoot the analyzer How to troubleshoot the analyzer Review ‘’Safety Considerations’’ and ‘’Troubleshooting Hints.’’ WARNING: Service must be performed by trained service personnel who are aware of the hazards involved (such as fire and electrical shock). Replacing Assemblies in chapter 3 to determine how to disassemble and assemble the analyzer.
Page 27 Troubleshooting the Analyzer How to troubleshoot the analyzer External keyboard does not work DIN connector, page 1-92 NVRAM or Battery failure message displayed Memory battery, Nonvolatile states not saved after power cycled page 1-93 Follow the recommended troubleshooting test until you locate the faulty assembly.
Page 28: To Perform Initial Verification
For information on the voltage selector switch and line fuse, see ‘’To change the line-voltage selector switch’’ and ‘’To change the fuse’’ in chapter 1 of the Agilent 89410A Installation and Verification Guide. Check power supply LEDs and fan.
Page 29 Troubleshooting the Analyzer To perform initial verification If the grid appears after power up, check that the calibration routine is not locking up the analyzer. Set the power switch to off ( O ). Press and hold [Return ] (below softkeys) while setting the power switch to on ( l ).
Page 30 Troubleshooting the Analyzer To perform initial verification Check frequency reference signals. Turn the analyzer upside down. Remove the bottom cover. Press [Preset Ω Using an oscilloscope and a 1 10:1 probe with a grounding spanner, check the TTL signals in the following table. The probe may load the 64 MHz, 48 MHz, and 80 MHz signals causing their amplitude level to be low.
Page 31 Troubleshooting the Analyzer To perform initial verification Step 6. Check signals required for power up. Remove the top cover. Connect a logic probe to A90 TP4 and its ground clip to A90 TP12. Set the power switch off ( O ) then on ( l ) and check that A90 TP4 is a TTL high 10 seconds after power up.
Page 32 Troubleshooting the Analyzer To perform initial verification Ω Using an oscilloscope and 1 10:1 probes, check the following system clock signals. Oscilloscope Setup Parameters Waveform Connect CH1 to A90 TP1 Time Duty Cycle CH1 V/div 1 V/div Input Impedance 1 MΩ CH1 Coupling Probe Atten Display Mode...
Page 33: To Troubleshoot The Power Supply
Troubleshooting the Analyzer To troubleshoot the power supply To troubleshoot the power supply Use this test to do a complete check of the power supply and to isolate the failure between the A95 Main Power Supply assembly and A96 Primary Power Supply assembly. WARNING: This procedure is performed with protective covers removed and power applied.
Page 34 Troubleshooting the Analyzer To troubleshoot the power supply Check the A96 Primary Power Supply assembly’s voltages. Set the power switch to off ( O ) and disconnect the power cord from the rear panel. Remove the top cover. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 35 Troubleshooting the Analyzer To troubleshoot the power supply Connect a digital voltmeter to the primary power cable as shown below. Connect the power cord to the rear panel. Calculate the differential voltage for the local line voltage using the following table. Line Selector Switch Differential Voltage ±30 Vdc 115 V...
Page 36 Troubleshooting the Analyzer To troubleshoot the power supply Check the A96 Primary Power Supply assembly’s ac bias voltages. Place the analyzer on the side closest to the keypad. Remove the bottom cover. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 37 Troubleshooting the Analyzer To troubleshoot the power supply A95 Component Locator, Bottom View 1-19...
Page 38 Troubleshooting the Analyzer To troubleshoot the power supply Check the A95 Main Power Supply assembly’s bias supply voltages. Check the bias supply voltages in the following table. The ripple should be no more than 50 mVp-p. Do not include high frequency line noise when measuring ripple.
Page 39 Troubleshooting the Analyzer To troubleshoot the power supply Check A102 Fan assembly. Set the power switch to off ( O ) and disconnect the power cord from the rear panel. Remove the top cover. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 40 Troubleshooting the Analyzer To troubleshoot the power supply Test Nominal Minimum Maximum Voltage ±10% Location Voltage Voltage P353, pin 1 +11 V +8 V +28 V −11 V −11.6 V −10.5 V P353, pin 2 P357, pin 2 +20 V +17.0 V +23.0 V J301...
Page 41 Troubleshooting the Analyzer To troubleshoot the power supply Check for power supply loading. Set the power switch to off ( O ) and disconnect the power cord from the rear panel. Place the analyzer on the side closest to the display. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 42 Troubleshooting the Analyzer To troubleshoot the power supply Isolate assembly loading power supply. Set the power switch to off ( O ) and disconnect the power cord from the rear panel. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 43: To Troubleshoot Display Failures
Troubleshooting the Analyzer To troubleshoot display failures To troubleshoot display failures Use this test to separate A100 Display assembly failures from A47 DSP/Display Controller assembly failures. If the screen is blank or the grid is not displayed, do initial verification on page 1-10 to determine if the A40 CPU assembly is faulty.
Page 44 Troubleshooting the Analyzer To troubleshoot display failures Set the power switch to on ( l ). Check the following display signals using a voltmeter. Test Location Signal Name Amplitude (±10%) A90 P10 pin 7 490 mVdc INTEN A90 P10 pin 15 25 to 45 mVdc A90 P10 pin 17 25 to 45 mVdc...
Page 45 Troubleshooting the Analyzer To troubleshoot display failures Check the 65 Vdc power supply. Set the power switch to off ( O ). Place the front panel in the A82 test position. (see Chapter 3, “To place the A82 in the test position”, on page 3-12.) Set the power switch to on ( l ).
Page 46 Troubleshooting the Analyzer To troubleshoot display failures 1-28...
Page 47 Troubleshooting the Analyzer To troubleshoot display failures Check for 65 Vdc on both sides of F1. If the voltage is correct on one side of F1 and incorrect on the other replace F1. If the voltage is incorrect on both sides of F1, then the A95 Main Power Supply is probably faulty.
Page 48 Troubleshooting the Analyzer To troubleshoot display failures Check the digital output signals to the LCD display. Using a logic probe verify that TTL logic pulses are present at the following locations: Signal Line Probe Location DENA VSYNC HSYNC If any of the signals are incorrect, the A82 LCD Interface assembly is probably faulty Verify the back lights and inverter boards.
Page 49 Troubleshooting the Analyzer To troubleshoot display failures If this voltage is incorrect then the A82 assembly is probably faulty. Check the input and output signals of the inverter board as listed below. Test Point Signal or Voltage CN 1 pin 1 + 4.9 Vdc CN 1 pin 2 + 4.9 Vdc...
Page 50: To Perform Self Tests
Troubleshooting the Analyzer To perform self tests To perform self tests Use this test when the keyboard is active and one of the following occurs: An error message is displayed Calibration fails Performance test fails Failure is intermittent Interface port fails Probe power fails Sync out fails 1-32...
Page 51 Troubleshooting the Analyzer To perform self tests Check sample clocks. Remove the top cover. Set the power switch to on ( l ). Using an oscilloscope and 2 BNC(m)-to-SMB(f) cables, check the following signals. Oscilloscope Setup Parameters Waveform Connect CH1 to A60 J3 Time Connect CH2 to A60 J2 Duty Cycle...
Page 52: A10 Analog Input
Troubleshooting the Analyzer To perform self tests Check for failing power-up results. Press the following keys: [System Utility auto cal off] [more cal setup auto zero cal off] Return more diagnostics service functions 1125 enter test log During the additional hardware power-up test, the A40 CPU assembly requests the hardware revision numbers from the following assemblies: A30 Digital Source...
Page 53: A40 Cpu
Troubleshooting the Analyzer To perform self tests Determine the probable faulty assembly and next test or step by comparing the power-up test results to the following table. The power-up tests are listed in the order they are ran. If power-up test messages match more than one entry in the table, use the entry closest to the beginning of the table.
Page 54: A50 Digital Filter
Troubleshooting the Analyzer To perform self tests Power-up Troubleshooting Guide Internal Control Path 3 open A35 Analog Source Front-end control, page 1-60- Unable to write/read Internal Control Path 3 A36 Trigger Unable to read Internal Control Path 3 A30 Digital Source Unable to program Source DC offset Extended RAM and Additional I/O not found A43 Expanded Memory...
Page 55 Troubleshooting the Analyzer To perform self tests Calibration ABORT A35 Analog Source Check that the jumper on the A35 Calibration information: A10 Analog Input, channel 2 Analog Source assembly is set for Check source jumper? A21 A/D Converter, channel 2 2 channel operation.
Page 56 Troubleshooting the Analyzer To perform self tests Step 3. Check for failing functional tests. Press the following keys: [clear test log Return functional tests The power-up tests are ran at the beginning of the functional all self tests. Refer to Step 1 for power-up test failures. All the power-up tests need to pass (except for calibration) before using the Self-Test Troubleshooting Guide.
Page 57 Troubleshooting the Analyzer To perform self tests Determine the probable faulty assembly and next test by comparing the functional test results to the following table. If the analyzer’s test log matches more than one entry in the table, use the entry closest to the beginning of the table. Assemblies are listed in order of probable failure when more than one assembly can cause the failure.
Page 58 Troubleshooting the Analyzer To perform self tests Self-Test Troubleshooting Guide Failing Self Test or Message Displayed Status Probable Faulty Next Test Assembly Skipping time cal This is not a failure message. (Time for an analyzer calibration. This message can appear anywhere in the test log.) Full Sample RAM ABORT A36 Trigger...
Page 59 Troubleshooting the Analyzer To perform self tests Failing Self Test or Message Displayed Status Probable Faulty Next Test Assembly Digital Source FAIL A30 Digital Source and both of the following: Digital filter PASS ADC. PASS Digital Source FAIL A30 Digital Source Digital Source information: LO sine wave test failed Digital Source...
Page 60 Troubleshooting the Analyzer To perform self tests Failing Self Test or Message Displayed Status Probable Faulty Next Test Assembly Calibration FAIL A10 Analog Input, channel Calibration information: number Channel number fails pad test Calibration FAIL To adjust calibrator, page 2-37 Calibration information: Calibrator way out of range Calibration...
Page 61 Troubleshooting the Analyzer To perform self tests Determine the probable faulty assembly and next test by comparing the analyzer’s symptoms to the following table. For additional information on the self tests, see the self-test descriptions starting on page 7-13 Failure Probable Faulty Assembly Next Test Disk Drive...
Page 62 Troubleshooting the Analyzer To perform self tests Performance test Performance test, page 1-58 Intermittent failure Intermittent, page 1-52- 1-44...
Page 63 Troubleshooting the Analyzer To perform self tests Check the HPIB controller on the A42 Memory assembly. Press the following keys: [System Utility more diagnostics functional tests HPIB controller If the HPIB controller test fails, the A42 Memory assembly is probably faulty. Check the oven fuse on the A95 Main Power Supply assembly.
Page 64 Troubleshooting the Analyzer To perform self tests 1-46...
Page 65 Troubleshooting the Analyzer To perform self tests Check the probe power fuse on the A95 Main Power Supply assembly. Set the power switch to off ( O ). Turn the analyzer upside down. Remove the bottom cover. Wait five minutes to allow time for the power supply capacitors to discharge.
Page 66: To Troubleshoot Self-Test Lockup Failures
Troubleshooting the Analyzer To troubleshoot self-test lockup failures To troubleshoot self-test lockup failures Use this test to continue troubleshooting if calibration or the functional test ‘’ALL’’ locks up the analyzer. Check for failing self tests. Set the power switch to off ( O ). Press and hold ] (below softkeys) while setting the power [Return...
Page 67 Troubleshooting the Analyzer To troubleshoot self-test lockup failures Press the following keys in the order listed. Allow enough time for each test to finish before pressing the next key. [Return functional tests sample RAM digital filter digital source more analog source input calibration A failure may cause the self tests to be very slow.
Page 68 Troubleshooting the Analyzer To troubleshoot self-test lockup failures Failing Self Test or Message Status Probable Faulty Next Test or Step Displayed Assembly Skipping time cal This is not a failure (Time for an analyzer calibration. message. This message can appear anywhere in the test log.) Full Sample RAM .
Page 69 Troubleshooting the Analyzer To troubleshoot self-test lockup failures Repeat the sample RAM self test without the Digital Source assembly. Set the power switch to off ( O ). Pull the A30 Digital Source assembly out of the card nest about 1 inch.
Page 70: To Troubleshoot Intermittent Failures
Use this test to help isolate intermittent failures to the assembly. Check that the analyzer has the latest firmware revision. See service note Agilent 89410A-01 for description of updates. Step 2. Determine if your intermittent failure is caused by one of the following common causes.
Page 71 Troubleshooting the Analyzer To troubleshoot intermittent failures Step 3. Run the functional tests in loop mode. Set the power switch to on ( l ). When the power-up tests are completed, press the following keys: System Utility [auto cal more cal setup auto zero cal off Return [more]...
Page 72 Troubleshooting the Analyzer To troubleshoot intermittent failures failure.See ‘’Fault Log Messages’’ on page 7-9for detailed descriptions of each fault log message. Failing Message Displayed Probable Faulty Next Test Assembly System Error A40 CPU Initial verification, System Error during Calibration A47 DSP/Display page 1-10 Controller A42 Memory...
Page 73 Troubleshooting the Analyzer To troubleshoot intermittent failures Failing Message Displayed Probable Faulty Next Test Assembly Channel 1 Control Path Failure A10 Analog Input Front-end Channel 2 Control Path Failure A21 A/D Converter control,page 1-60 A30 Digital Source Calibration Failure A10 Analog Input Calibration Hardware Timeout A35 Analog Source A21 A/D Converter...
Page 74 Troubleshooting the Analyzer To troubleshoot intermittent failures Check the calibration correction curves. Press the following keys: Preset System Utility auto cal off more cal setup auto zero cal off] Measurement Data freq response Ref Lvl/Scale Y ref level Y per div rng tracking off] ref position ref line on...
Page 75 Troubleshooting the Analyzer To troubleshoot intermittent failures If the analyzer has the optional second channel, repeat the previous two steps for channel 2. ], press and substitute After pressing [Preset [ B] [ Range] [channel 2] [ch2 range] [ch1 range]. If a calibration curve is not within +2.5 dB and -1 dB of the range level setting, go to page page...
Page 76: To Troubleshoot Performance Test Failures
Troubleshooting the Analyzer To troubleshoot performance test failures To troubleshoot performance test failures Use this test when a performance test is failing and the self tests passed except for calibration. Determine if an adjustment is causing the analyzer to fail a performance test.
Page 77 Troubleshooting the Analyzer To troubleshoot performance test failures Failing Performance Test Probable Faulty Assembly Troubleshooting Test (in order of probability) DC Offset A10 Analog Input Input and ADC, page 1-71 A21 A/D Converter Two channel analyzer, page 1-75 Amplitude Accuracy A10 Analog Input Source and calibrator out, A35 Analog Source...
Page 78: To Troubleshoot Front-End Control Failures
Troubleshooting the Analyzer To troubleshoot front-end control failures To troubleshoot front-end control failures Use this test when a control path test fails or an assembly is not found. Check the digital source. Set the power switch to on ( l ). After the power-up routine is finished, press the following keys: [System Utility [auto cal off]...
Page 79 Troubleshooting the Analyzer To troubleshoot front-end control failures Check front-end control loop signals. Place the analyzer on the side closest to the display. Remove the bottom cover. Press the following keys: [Return loop mode setup forever Return functional tests power-up tests more additional hardware Using a logic probe, check that the TTL signals listed in the...
Page 80: To Troubleshoot Source And Calibrator Out Failures
Troubleshooting the Analyzer To troubleshoot source and calibrator out failures To troubleshoot source and calibrator out failures Use this test when the analog source or calibrator is suspected of failing and all self tests listed before the ADC in the Self-Test Troubleshooting Guide on page 1-32 passed.
Page 81 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures the source sine wave at the failing values. If the signal is incorrect, go to Step 7. Set the oscilloscope to 600 mV/div. Press the following keys: [DC offset Marker/Entry Rotate the RPG knob while monitoring the oscilloscope.
Page 82 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Test Location Signal Name A91 J6 pin 12B OFF[0] A91 J6 pin 12C OFF[1] A91 J6 pin 13B OFF[2] A91 J6 pin 13C OFF[3] A91 J6 pin 14B OFF[4] A91 J6 pin 14C OFF[5] A91 J6 pin 15B OFF[6]...
Page 83 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Check the periodic chirp output. Press the following keys: [DC offset source type periodic chirp Using an oscilloscope and 1:1 probe, check the following signal. Oscilloscope Setup Parameters Waveform Connect CH1 to SOURCE Variations CH1 V/div 300 mV/div...
Page 84 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Check the calibrator output. Press the following keys: [Preset System Utility auto cal off] [more cal setup auto zero cal off] [Return more diagnostics service functions 1125 enter special test modes cal signal Using an oscilloscope and 1:1 probe, check the following signal.
Page 85 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Check the random noise output. Press the following keys: [cal signal off] [Source source on] [level source type random noise Using an oscilloscope and 1:1 probe, check the following signal. Oscilloscope Setup Parameters Waveform...
Page 86 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Step 6. Check the source attenuation. Ω Connect a digital multimeter to the SOURCE output using a 50 feedthrough termination and BNC cable. Press the following keys: [CW (fixed sine) Return sine freq level...
Page 87 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures channel analyzer, go to page 1-75, ‘’To troubleshoot two channel analyzer failures.’’ Check frequency sample signals. Place the analyzer on the side closest to the display. Remove the bottom cover. Press [Preset Using a logic probe, check that the TTL signals listed in the following table are toggling.
Page 88 Troubleshooting the Analyzer To troubleshoot source and calibrator out failures Check DAC signals. Press the following keys: [Preset Source source on] Using a logic probe, check that the TTL signals listed in the following table are toggling. Test Location Signal Name A91 J6 pin 4A DAC[0] A91 J6 pin 4C...
Page 89: To Troubleshoot Input And Adc Failures
Troubleshooting the Analyzer To troubleshoot input and ADC failures To troubleshoot input and ADC failures Use this test to isolate input failures to the A10 Analog Input assembly or A21 A/D Converter assembly. Check the input path. Set the synthesizer as follows: Frequency 1 MHz Amplitude...
Page 90 Troubleshooting the Analyzer To troubleshoot input and ADC failures failing range, impedance, and frequency. Input a full scale signal. If the input level equals the range level, A10 J2 and A10 J3 should match the amplitudes in the above table. Check the dc offset DAC.
Page 91 Troubleshooting the Analyzer To troubleshoot input and ADC failures To keep the sine wave displayed, adjust the oscilloscope’s trigger level while varying the trigger offset value. If the trigger offset function is incorrect, the A10 Analog Input assembly is probably faulty. Reconnect A10 J3 to A36 J5.
Page 92 Troubleshooting the Analyzer To troubleshoot input and ADC failures Time/div 200 ns/div Probe Atten Connect a high impedance 1:1 oscilloscope probe to A91 J6 pin 29B. The signal should be 423 ±42 mVp-p. If the signal is incorrect, the A35 Analog Source assembly is probably faulty.
Page 93: To Troubleshoot Two Channel Analyzer Failures
Troubleshooting the Analyzer To troubleshoot two channel analyzer failures To troubleshoot two channel analyzer failures Use this test to isolate the failure when one channel fails in a two channel analyzer. Check for failing self tests and calibration routine. Set the power switch to on ( l ). When the power-up tests are finished, press the following keys: [System Utility auto cal off]...
Page 94 Troubleshooting the Analyzer To troubleshoot two channel analyzer failures isolate the failure symptom. Once the exact failure symptom is known, do the following steps but substitute the failure symptom for the self tests. Exchange the assemblies in channel 1 with the assemblies in channel 2, then check for failing tests.
Page 95 Troubleshooting the Analyzer To troubleshoot two channel analyzer failures operating correctly. This is caused by the ADC dither function. The noise floor should settle after about 3 minutes and should not affect the self-test results. Step 3. Exchange channel 1 and channel 2 A/D Converter assemblies, then check for failing tests.
Page 96 Troubleshooting the Analyzer To troubleshoot two channel analyzer failures Check the analog source to input paths. Press the following keys: Preset Source] [source on level System Utility [more cal setup] auto zero cal off Return more diagnostics service functions special test modes input channel 1 source Using a BNC(m)-to-SMB(f) cable, connect the oscilloscope to...
Page 97 Troubleshooting the Analyzer To troubleshoot two channel analyzer failures Time/div 200 ns/div Probe Atten Using a a high impedance 1:1 oscilloscope probe, check that A91 J6 pin 27B is a 423 ±42 mVp-p signal. Press the following keys: [channel 2 front BNC] [channel 1 source] m Using a high impedance 1:1 oscilloscope probe, check that A91 J6 pin 29B is a 423 ±42 mVp-p signal.
Page 98: To Troubleshoot Auto-Range Failures
Troubleshooting the Analyzer To troubleshoot auto-range failures To troubleshoot auto-range failures Use this test when the auto-range function is suspected of failing and the following self tests passed: Input If the analyzer has the optional second channel, perform Step 1 for both channels.
Page 99 Troubleshooting the Analyzer To troubleshoot auto-range failures Check the channel 1 auto-range signals. Place the analyzer on the side closest to the display. Remove the bottom cover. Press the following keys: Marker/Entry Using a BNC cable, connect the SOURCE output to CHANNEL 1 input.
Page 100 Troubleshooting the Analyzer To troubleshoot auto-range failures For analyzers with the optional second channel, check the channel 2 auto-range signals. Press the following keys: [Source Using a BNC cable, connect the SOURCE output to CHANNEL 2 input. Using a logic probe, check the TTL signals listed in the following table.
Page 101: To Troubleshoot Trigger Failures
Troubleshooting the Analyzer To troubleshoot trigger failures To troubleshoot trigger failures Use this test when the trigger function is suspected of failing and the following self tests passed: Digital Source Digital Filter Check the trigger calibration signal. l ). Set the power switch to on ( When the power-up tests are finished, press the following keys: Preset System Utility...
Page 102 Troubleshooting the Analyzer To troubleshoot trigger failures Check trigger modes. Press the following keys: Preset [ System Utility] [more cal setup] auto zero off Return Range dBm] [ Source] [source on source type periodic chirp Return [level Frequency time data zoom If the analyzer has two channels, press [ ], then [ Range...
Page 103 Troubleshooting the Analyzer To troubleshoot trigger failures following keys while monitoring the display. Note which trigger types are functioning: Trigger [trigger type] IF channel 2 channel 2 Return [chan level] slope [ −] Compare the trigger failure to the failures listed in the following table.
Page 104 Troubleshooting the Analyzer To troubleshoot trigger failures Check channel trigger circuits. Set synthesizer as follows: Frequency 1 MHz Amplitude 724 mVp-p Function Sine Wave Using a BNC(m)-to-SMB(f) cable, connect the synthesizer to A36 J2 to check channel 1 trigger or A36 J5 to check channel 2 trigger. Press the following keys: [Trigger trigger type...
Page 105 Troubleshooting the Analyzer To troubleshoot trigger failures Test Location Signal Name Probable Faulty Assembly A91 P6 pin 10 CLK25M A60 Frequency Reference A91 P6 pin 11 FSA2 A60 Frequency Reference A91 P6 pin 16 FSA1 A60 Frequency Reference A91 P1 pin 16 GTCLK A36 Trigger A91 P1 pin 22...
Page 106: To Troubleshoot Disk Drive Failures
Troubleshooting the Analyzer To troubleshoot disk drive failures To troubleshoot disk drive failures Use this test to isolate disk drive failures to the A42 Memory assembly, the A101 Disk Drive assembly, or the flexible disk. Check disk controller. Press the following keys: System Utility more] diagnostics...
Page 107 Troubleshooting the Analyzer To troubleshoot disk drive failures Measure the resistance across F1. Ω If the resistance is 0 , the Disk Drive assembly or the disk drive cable is probably faulty. Ω If the resistance was greater than 0 , replace the fuse.
Page 108 Troubleshooting the Analyzer To troubleshoot disk drive failures Check the Disk Drive assembly. Insert a formatted disk into the Disk Drive assembly and press the following keys: Return Return test log clear test log Return special test modes disk drive restore random seek seek record...
Page 109: To Troubleshoot Serial Port Failures
Troubleshooting the Analyzer To troubleshoot serial port failures To troubleshoot serial port failures Use this test to check the serial 1 and serial 2 ports on the A42 Memory assembly. Check the serial port controller. Press the following keys: [System Utility more diagnostics service functions...
Page 110: To Troubleshoot Din Connector Failures
Troubleshooting the Analyzer To troubleshoot DIN connector failures To troubleshoot DIN connector failures Use this test to determine if the fuse for the DIN connector is failing before replacing the A80 Keyboard assembly. Set the power switch to on ( l ). Check the voltage on pin 4 of the KEYBOARD connector for +5V.
Page 111: To Troubleshoot Memory Battery Failures
Troubleshooting the Analyzer To troubleshoot memory battery failures To troubleshoot memory battery failures Use this test when battery-backed-up memory is suspected of failing. This test separates A42 Memory assembly failures from memory battery failures. Check battery-backed-up memory. Set the power switch to on ( l ). Press the following keys: [System Utility more...
Page 112 Troubleshooting the Analyzer To troubleshoot memory battery failures CAUTION: There is danger of explosion if battery is incorrectly replaced. Replace the battery with the same or an equivalent type listed in Chapter 4, “Replaceable Parts”, Discard used batteries according to the battery manufacturer’s instructions. 1-94...
Page 113: To Troubleshoot Sync Out And Parallel Port Failures
Troubleshooting the Analyzer To troubleshoot sync out and parallel port failures To troubleshoot sync out and parallel port failures Use this test to determine if the fuses for the parallel port and sync out are failing before replacing the A30 Digital Source assembly. The sync ≥...
Page 114: To Troubleshoot System Interconnect And Lan Port Failures
Troubleshooting the Analyzer To troubleshoot system interconnect and LAN port failures To troubleshoot system interconnect and LAN port failures Use this test to check the system interconnect, ThinLAN, and AUI ports on the A43 Expanded Memory assembly. Check the HPIB interconnect and LAN controller. Press the following keys: [Preset System Utility...
Page 115 Troubleshooting the Analyzer To troubleshoot system interconnect and LAN port failures ThinLAN loop back If the ThinLAN loop back test fails, the A43 Expanded Memory assembly is probably faulty. Check the AUI LAN port. Connect a ThinLAN Transceiver (AUI to ThinLAN converter) to the AUI LAN port.
Page 116 Troubleshooting the Analyzer To troubleshoot system interconnect and LAN port failures 1-98...
Page 117: Adjusting The Analyzer
Adjusting the Analyzer...
Page 118 Adjusting the Analyzer To adjust oven shutdown, page 2-7 To adjust input flatness, page 2-10 To adjust input capacitance, page 2-13 To adjust input offset, page 2-16 To adjust anti-alias filter, page 2-18 To adjust ADC, page 2-24 To adjust 10 MHz low pass filter, page 2-25 To adjust auto-range detect level, page 2-29...
Page 119 Adjusting the Analyzer Adjusting the Analyzer This chapter contains the adjustment procedures for the Agilent 89410A DC-10 MHz Vector Signal Analyzer. Follow these procedures if the analyzer does not meet its specifications or if instructed in chapter 1,Troubleshooting the Analyzer...
Page 120 Safety Considerations Although the Agilent 89410A analyzer is designed in accordance with international safety standards, this guide contains information, cautions, and warnings that must be followed to ensure safe operation and to keep the unit in safe condition. Adjustments in this chapter are performed with power applied and protective covers removed.
Page 121 Under no circumstances should an operator remove any covers, screws, shields or in any other way access the interior of the Agilent 89410A analyzer. There are no operator controls inside the analyzer. Equipment Required...
Page 122 Remote Operation Adjustments can be setup using the remote operation capability of the Agilent 89410A analyzer. The following table lists the adjustments and corresponding HPIB codes. See the Agilent 89400 Series HPIB Command Reference for general information on remote operation.
Page 123: To Adjust Oven Shutdown
The Agilent 89410A Vector Signal Analyzer must be off for at least 8 hours before this adjustment is made. Once power is applied, the adjustment MUST be completed within FIVE MINUTES.
Page 124 10 MHz Frequency Span 1 MHz −60 dBm Reference Level Connect the spectrum analyzer to the Agilent 89410A’s OVEN REF OUT connector using the BNC cable. ≤ Check that the 10 MHz signal is -70 dBm. Set the power switch to on ( l ).
Page 125 Replace the power supply shield. Set the power switch to off ( O ). Replace the power supply shield. To continue the oven adjustments, allow the Agilent 89410A to warm up for at least 48 hours then do the oven frequency adjustment on page 2-34.
Page 126: To Adjust Input Flatness
Remove screws holding the A10 Analog Input assembly in the card nest. Place the assembly on an extender board. Set the power switch to on ( l ). Set up the Agilent 89410A. Press the following keys: [ System Utility [ more...
Page 127 Connect the network analyzer’s reference channel to A10 J2 using an N(m)-to-BNC(f) adapter and SMB(f)-to-BNC(m) cable. Connect the network analyzer’s source to the Agilent 89410A’s input using an N(m)-to-BNC(f) adapter and BNC cable. Normalize the measurement. Wait for a complete sweep on the network analyzer.
Page 128 Adjusting the Analyzer To adjust input flatness Normalize the measurement. Press the ] softkey. [ setup 1 Set the network analyzer’s input to the reference channel. Wait for a complete sweep on the network analyzer. Store the trace data in a storage register. Set the network analyzer to divide the reference channel by the storage register.
Page 129: To Adjust Input Capacitance
Ω feedthrough termination 10 kΩ series resistor (2) N(m)-to-BNC(f) adapters Flat-edge adjustment tool, Agilent part number 8710-1928 Set up the Agilent 89410A. Disconnect the network analyzer’s source and receiver from the Agilent 89410A. Press the following keys: [ Return [ input capacitance...
Page 130 Connect the network analyzer’s reference channel to A10 J2 using an N(m)-to-BNC(f) adapter and SMB(f)-to-BNC(m) cable. Ω Connect a 10 k series resistor to the Agilent 89410A’s input. Ω Connect a 50 feedthrough termination to the 10 kW series resistor.
Page 131 Adjusting the Analyzer To adjust input capacitance Adjust A10 C123. Press the ] softkey. [ setup 2 Set the network analyzer’s reference level to the value at 10 kHz. Center the trace on the network analyzer’s display, then set the scale to 0.5 dB/div.
Page 132: To Adjust Input Offset
Adjusting the Analyzer To adjust input offset To adjust input offset This procedure adjusts the A10 Analog Input assembly’s offset voltage to zero volts. Perform the previous adjustment before doing this adjustment. Equipment Required: Digital multimeter Extender board, Agilent part number 89410-B1001 Ω...
Page 133 Adjusting the Analyzer To adjust input offset 2-17...
Page 134: To Adjust Anti-Alias Filter
-13 dBm Display format log magnitude Connect the network analyzer’s reference channel to A10 J2 using an N(m)-to-BNC(f) adapter and SMB(f)-to-BNC(m) cable. Connect the network analyzer’s source to the Agilent 89410A’s input using an N(m)-to-BNC(f) adapter and BNC cable. 2-18...
Page 135 Adjusting the Analyzer To adjust anti-alias filter Adjust L38. Attach a jumper to the pins shown in the following illustration. A10 Analog Input Component Locator, Back View Adjust the network analyzer’s reference level so the signal is visible. Adjust L38 for a minimum marker reading using the flat-edge adjustment tool.
Page 136 Adjusting the Analyzer To adjust anti-alias filter A10 Analog Input Component Locator, Front View Normalize the measurement. Press the [ setup 2 ] softkey. Set the network analyzer as follows: Receiver reference channel Attenuation 0 dB Resolution BW 1 kHz Source Sweep Mode continuous...
Page 137 Adjusting the Analyzer To adjust anti-alias filter Adjust A10 L39, L40, and L41. Press the ] softkey. [ setup 3 Set the network analyzer’s reference level 0 dB. Set the reference position at 80% of the display and the scale to 0.5 dB/div.
Page 138 Adjusting the Analyzer To adjust anti-alias filter Normalize the measurement. Press the ] softkey. [ setup 2 Change the network analyzer to the following: Receiver reference channel Resolution BW 10 Hz Source Sweep Time 40 s Start Frequency 15.6 MHz Stop Frequency 54 MHz Wait for a complete sweep on the network analyzer.
Page 139 Adjusting the Analyzer To adjust anti-alias filter must be done after the channel 1 A10 Analog Input assembly or the A35 Analog Source assembly is adjusted. This completes the A10 Analog Input assembly adjustments. 2-23...
Page 140: To Adjust Adc
To adjust ADC To adjust ADC This procedure adjusts the A21 A/D Converter assembly’s ADC. The Agilent 89410A optimizes the ADC circuits. This procedure only needs to be done if an A21 A/D Converter assembly is replaced. Equipment Required: None Set the power switch to on ( l ).
Page 141: To Adjust 10 Mhz Low Pass Filter
Do not remove the screws in the center of the cover. Place the assembly on an extender board. Set the power switch to on ( l ). Set up the Agilent 89410A. Press the following keys: [ System Utility...
Page 142 Stop Frequency 30 MHz Connect the network analyzer’s reference channel to the Agilent 89410A’s source using an N(m)-to-BNC(f) adapter and BNC cable. Connect the network analyzer’s source to A35 TP14 (AMPIN) and TP13 (Ground) using an N(m)-to-BNC(f) adapter, BNC cable, and BNC(f)-to-test clips adapter.
Page 143 Adjusting the Analyzer To adjust 10 MHz low pass filter Normalize the measurement. Wait for a complete sweep on the network analyzer. Store the trace data in a storage register. Set the network analyzer to divide the reference channel by the storage register.
Page 144 Adjusting the Analyzer To adjust 10 MHz low pass filter Adjust A35 L3 and A35 L4. Press the ] softkey. [ setup 2 Set the network analyzer’s reference level to 10 dB. Set the scale to 10 dB/div. Adjust A35 L3 for zero transmission at 15.8 MHz using the flat-edge adjustment tool.
Page 145: To Adjust Auto-Range Detect Level
Adjusting the Analyzer To adjust auto-range detect level To adjust auto-range detect level This procedure adjusts the A36 Trigger assembly’s ±12 Vdc regulators. The regulators are used to set the over-range and half-range detect levels in the auto-range circuits. Equipment Required: Digital multimeter Extender board, Agilent part number 89410-B1002 Flat-edge adjustment tool, Agilent part number 8710-1928...
Page 146 Adjusting the Analyzer To adjust auto-range detect level Adjust A36 R114. Connect the digital voltmeter to A36 TP4 and TP1 (ground). ± Adjust A36 R114 for a voltmeter reading of -1.259 0.003 Vdc using the flat-edge adjustment tool. Adjust A36 R120. Connect the digital voltmeter to A36 TP5 and TP1 (ground).
Page 147 Adjusting the Analyzer To adjust auto-range detect level Reinstall the A36 Trigger assembly. Set the power switch to off ( O ). Place the assembly in the card nest. Reconnect the following using original cables: A36 J3 to rear panel EXT ARM (white cable) A36 J4 to front panel EXT TRIGGER (blue cable) A36 J2 to A10 J3 (channel 1) A36 J5 to A10 J3 (channel 2)
Page 148: To Adjust Reference Oscillator
Adjusting the Analyzer To adjust reference oscillator To adjust reference oscillator This procedure adjusts the A60 Frequency Reference assembly’s reference oscillator. Equipment Required: Frequency counter Extender board, Agilent part number 89410-B1002 SMB(f)-to-BNC(m) cable Flat-edge adjustment tool, Agilent part number 8710-1928 Plastic screw driver, Agilent part number 8710-2056 Place the A60 Frequency Reference assembly on an extender board.
Page 149 Adjusting the Analyzer To adjust reference oscillator Adjust A60 C55. Center A60 R66 by turning the potentiometer to the end and then 10 turns back. This is the fine frequency adjustment potentiometer. It needs to be centered before the coarse frequency adjustment is done. Connect the frequency counter to A60 J2 using the SMB(f)-to-BNC(m) cable.
Page 150: To Adjust Oven Frequency
Adjusting the Analyzer To adjust oven frequency To adjust oven frequency This procedure adjusts the optional A85 Oven assembly’s frequency. The Agilent 89410A must be on for at least 48 hours before this adjustment is made. Equipment Required: Oscilloscope Frequency standard...
Page 151 Adjusting the Analyzer To adjust oven frequency Set up the oscilloscope. Connect the frequency standard’s output to the oscilloscope’s external trigger. Check that the frequency standard is properly terminated. Set the oscilloscope as follows: Channel 1 Volts/Div 100 mV/div Offset Ω...
Page 152 Adjusting the Analyzer To adjust oven frequency Replace the oven screw and power supply shield. Set the power switch to off ( O ). Replace the oven adjustment screw. Replace the power supply shield. This completes the A85 Oven assembly adjustments. 2-36...
Page 153: To Adjust Calibrator
Do this procedure only when required. Equipment Required: Milliwatt power meter Synthesizer (2) BNC cables N(f)-to-BNC(f) adapter Set up the Agilent 89410A. Replace all covers. Set the power switch to on ( l ). Press the following keys: [ System Utility [ single cal...
Page 154 Function sine wave Connect the synthesizer’s external reference to the Agilent 89410A’s EXT REF IN. See the following illustration for setup. Connect the synthesizer’s output to the milliwatt power meter. Adjust the synthesizer’s amplitude to read 0 dBm on the milliwatt power meter.
Page 155: Replacing Assemblies
Replacing Assemblies...
Page 156 Replacing Assemblies What to do before replacing the analog source, page 3-4 What to do after replacing an assembly, page 3-5 To remove CPU and memory, page 3-8 To remove front panel, page 3-10 To remove the Flat Panel Display, page 3-11 To place the A82 in the test position, page 3-12 To remove disk...
Page 157 WARNING: Disconnect the power cord from the rear panel before disassembly or assembly of the Agilent 89410A. Even with power removed, there can be sufficient stored energy in some circuits to cause personal injury. These voltages will discharge to a relatively safe level approximately five minutes after the power cord is disconnected.
Page 158: What To Do Before Replacing The Analog Source
Replacing Assemblies What to do before replacing the analog source What to do before replacing the analog source Before replacing the A35 Analog Source assembly, check that the jumper is in the correct position.
Page 159: What To Do After Replacing An Assembly
Replacing Assemblies What to do after replacing an assembly What to do after replacing an assembly Option and configuration information is stored in the A40 CPU assembly and A42 Memory assembly. Providing only one assembly is replaced at a time, the option and configuration information will be stored in the replaced assembly at power up.
Page 160 Replacing Assemblies What to do after replacing an assembly Assembly Replaced Adjustment Performance Test A10 Analog Input , channel 1 Input flatness, page 2-10- Amplitude accuracy Input capacitance, page 2-13- Amp_phase match (option AY7 only) Input offset, page 2-16 Input trigger Anti-alias filter, page 2-18 Harmonic distortion...
Page 161: A81 Keyboard
Replacing Assemblies What to do after replacing an assembly A60 Frequency Reference Reference oscillator, page 2-32 Frequency accuracy A61 Clock Clock, page 2-34 Frequency accuracy A71 Pass Through A81 Keyboard A82 Flat Panel Display Interface A85 Oven Oven shutdown, page 2-7 Frequency accuracy Oven frequency, page 2-34...
Page 162: To Remove Cpu And Memory
Replacing Assemblies To remove CPU and memory To remove CPU and memory Using a T-10 torx driver, remove the five screws from the #6 Pull the assemblies out of the card nest and disconnect the cover. cables. The cables can be pulled about two inches out of the card nest.
Page 163: A42 Memory
Replacing Assemblies To remove CPU and memory Remove the four screws that hold the assemblies together. Unplug the A40 CPU assembly from the A42 Memory Use a T-8 torx driver to remove the two front screws and a assembly. T-10 torx driver to remove the two rear screws.
Page 164: To Remove Front Panel
Replacing Assemblies To remove front panel To remove front panel Remove trim strip from top of front frame. Using a T-10 torx Pull the top of the front panel out of the frame. driver, remove four screws from top and five screws from bottom of front frame.
Page 165: To Remove The Flat Panel Display
Replacing Assemblies To remove the Flat Panel Display To remove the Flat Panel Display Remove the front panel (see ‘’To remove front Unplug the 3 pin connector from the A82 Flat Panel panel’’page 3-10). Interface assembly. . Using a T-10 torx driver, remove the six screws from the A82 Using a T-10 torx driver, remove the four screw from the shield.
Page 166: To Place The A82 In The Test Position
Replacing Assemblies To place the A82 in the test position To place the A82 in the test position Remove the front panel (see ‘’To remove front Using a T-15 torx driver, remove the screw from the back of panel’’page 3-10). the top cover.
Page 167 Replacing Assemblies To place the A82 in the test position Unplug the 3 pin connector from the A82 Flat Panel Using a T-10 torx driver, remove the six screws from the A82 Interface assembly. sheild. Remove the A82 shield. Reconnect the 3 pin connector to the A82 Flat Panel Route W4, W6, and W17 to the top and reconnect to the Interface assembly.
Page 168: To Remove Disk Drive
Replacing Assemblies To remove disk drive To remove disk drive Remove the front panel (see ‘’To remove front Using a T-15 torx driver, remove the screw from the back of panel’’page 3-10). the bottom cover. Slide the cover off. Using a 2 point pozidriv, remove the screw from both end Using a 2 point pozidriv, remove the two screws from the caps on the strap handle nearest the Disk Drive assembly.
Page 169 Replacing Assemblies To remove disk drive Using a T-15 torx driver, remove the two screws from the Using a T-15 torx driver, remove the screw from the side disk drive bracket. strut. Note the polarity of the disk drive cable (the cable is not Using a T-10 torx driver, remove the four screws from the keyed to the Disk Drive assembly and can be incorrectly disk drive bracket.
Page 170: To Remove Main Power Supply
Replacing Assemblies To remove main power supply To remove main power supply Using a T-15 torx driver, remove the screw from the back of Using a 2.5 mm hex driver, remove the screws that fasten the bottom cover. Slide the cover off. the red cable to A95 J301 and the black cable to A95 J302.
Page 171 Replacing Assemblies To remove main power supply Note the polarity of the disk drive cable (the cable is not Lift the A95 Main Power Supply assembly up and keyed to the Disk Drive assembly and can be incorrectly disconnect all cables. connected).
Page 172: To Remove Analog Motherboard
Replacing Assemblies To remove analog motherboard To remove analog motherboard Using a T-15 torx driver, remove the screw from the back of Using a T-15 torx driver, remove the screw from the back of the bottom cover. Slide the cover off. the top cover.
Page 173 Replacing Assemblies To remove analog motherboard Raise the front of the analyzer off the bench by placing a Position the motherboard cable extraction tool (from the book under the analyzer’s front frame. service kit) inside the cardnest over the coaxial cable connector for the A35 Analog Source assembly.
Page 174: To Remove Rear Panel
Replacing Assemblies To remove rear panel To remove rear panel Using a T-15 torx driver, remove the screw from the back of Using a T-15 torx driver, remove the screw from the back of the bottom cover. Slide the cover off. the top cover.
Page 175 Replacing Assemblies To remove rear panel Remove all assemblies attached to the covers. When Using a T-10 torx driver, remove the four screws that fasten removing cover #6, pull the assemblies out and disconnect the rear panel to the card nest. the cables.
Page 176 Replacing Assemblies To remove rear panel Disconnect the cables connected to A36 J3, A60 J4, and A60 J5. Remove the gray cable from the cable clamp on the right rear of the display. Disconnect the fan cable from A95 P353. Disconnect the primary power cables from A95 P350 and A95 P352.
Page 177: To Remove Digital Motherboard
Replacing Assemblies To remove digital motherboard To remove digital motherboard Using a T-15 torx driver, remove the screw from the back of Using a 2.5 mm hex driver, remove the screws that fasten the bottom cover. Slide the cover off. the red cable to A95 J301 and the black cable to A95 J302.
Page 178 Replacing Assemblies To remove digital motherboard Unplug all assemblies from the A90 Digital Motherboard. To Using a T-15 torx driver, remove the four screws from the unplug the assembly behind cover #3, remove assembly power supply shield. Remove the power supply shield. attached to cover #3.
Page 179 Replacing Assemblies To remove digital motherboard Pull the A90 Digital Motherboard out of the card nest. 3-25...
Page 180: A100 Display, Backlights, And Filter
Replacing Assemblies A100 Display, Backlights, and Filter A100 Display, Backlights, and Filter Display Parts Refer to firgure above. The display assembly consist of: EMI filter (1) display mount (2) LCD with backlights (3) display shield board (4) 3-26...
Page 181 Replacing Assemblies A100 Display, Backlights, and Filter Display Removal CAUTION: The new flat panel display comes with a protective plastic sheet over the glass. Remove this plastic very slowly to avoid damage due to ESD. CAUTION: The surface of the display is very easily scratched. Avoid touching it with your bare hands or other objects.
Page 182 Replacing Assemblies A100 Display, Backlights, and Filter A2 Display Replacement Display Replacement Carefully slide the display into the rubber mount. Align the pins on the mount with the holes in the display. Replace the display shield. Close the flaps on the rubber mount. Carefully place the display mount into position in the front frame assembly as shown in Display Removal procedure.
Page 183 Replacing Assemblies A100 Display, Backlights, and Filter Backlight Removal/Replacement There are two backlight assemblies installed in the flat panel display. NOTE: The backlight lamps should be replaced as a pair, even if only one lamp is bad. The other one might fail shortly. Rthe Refer to the "Display Removal"...
Page 184 Replacing Assemblies A100 Display, Backlights, and Filter Insert the new backlight assembly (2) by sliding it into the display, non-wired end first, taking care not to force it. It is keyed so it will only fit properly one way. Slide it all the way in to the end of the casing.

Agilent Technologies 89410A Service Manual

2 Adjusting the Analyzer

3 Replacing Assemblies

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