Keysight N1913 Service Manual Download Page 121

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Repair Guide

Keysight N1913/1914A Service Guide

121

Step 4

Unlock the main plastic clip that holds the front panel

sub-frame and display support molding together (situated

beside the key flex circuit), and carefully pull them apart to

separate them.

Step 5

Remove the four screws that are attached to the display from

the display support molding, and then disconnect it from the

display interface board.

Instructions

Visual

Summary of Contents for N1913

Page 1: ...Keysight N1913 1914A EPM Series Power Meters Service Guide...

Page 2: ...hts customarily provided to the public to use modify reproduce release per form display or disclose commercial computer software or commercial com puter software documentation No additional government...

Page 3: ...going warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the...

Page 4: ...erator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers For continued protection against fire hazard replace the line fuse s only with f...

Page 5: ...hnologies assumes no liability for the customer s failure to comply with these requirements WARNING Before this instrument is switched on make sure it has been properly grounded through the protective...

Page 6: ...n information Earth ground terminal Frame or chassis ground terminal Protective earth ground terminal Equipment protected throughout by double insulation or reinforced insulation Both direct and alter...

Page 7: ...requirements for this instrument Environmental condition Requirement Temperature Operating condition 0 C to 55 C Storage condition 40 C to 70 C Humidity Operating condition Up to 80 RH at 40 C non co...

Page 8: ...1010 1 2010 3rd Edition Canada CAN CSA C22 2 No 61010 1 12 USA ANSI UL 61010 1 3rd Edition EMC compliance The EMC test conforms to the IEC61326 1 2005 EN61326 1 2006 and CISPR11 2003 EN55011 2007 Grou...

Page 9: ...ment This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste ICES NMB 001 indicates that this ISM device complies with the Cana...

Page 10: ...a Monitoring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Serv...

Page 11: ...ance 8 Low voltage directive 8 Regulatory Markings 9 Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC 10 Product category 10 Sales and Technical Support 10 1 Specifications and Char...

Page 12: ...ance Tests Introduction 48 Complete Equipment List 49 1 mW Power Reference Level Test 51 Description 51 Equipment 51 Test method 52 Output Standing Wave Ratio SWR Test 53 Description 53 Equipment 53 T...

Page 13: ...bly 68 Purpose 68 Inputs 68 Outputs 68 Main Board Assembly 69 Purpose 69 Inputs 69 Outputs 69 Calibrator Assembly 70 Purpose 70 Inputs 70 Outputs 70 Front Panel Assembly 71 Purpose 71 Inputs 71 Output...

Page 14: ...3 Additional spare parts 97 Calibrator assembly 99 Improved calibrator assembly 100 Outer housing components 101 Sundries 103 Tools Required 104 Required Torque Values for Fasteners 105 Disassembly In...

Page 15: ...ontacting Keysight Technologies Introduction 134 Contacting Keysight Technologies 134 Before Calling Keysight Technologies 135 Check the Basics 136 Instrument Serial Numbers 137 Returning Your Power M...

Page 16: ...16 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 17: ...Figure 6 1 Calibrator assembly and improved calibrator assembly 100 Figure 6 2 Separate the clamshells 106 Figure 6 3 Remove the top clamshell 107 Figure 6 4 Remove the PSU safety cover and cable gui...

Page 18: ...18 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 19: ...external for U2000 Series 28 Table 1 3 Noise multiplier 30 Table 1 4 Power sensor specifications 30 Table 1 5 U2000 Series power sensors specification 33 Table 1 6 8480 Series settling time 35 Table 1...

Page 20: ...20 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 21: ...Specifications 24 Power Sensor Specifications 25 Power Meter Supplemental Characteristics 30 Settling Time 35 Measurement Characteristics 41 Rear Panel Inputs and Output Connections 42 1 mW Power Ref...

Page 22: ...ing the power meter by giving typical but non warranted performance parameters These characteristics are shown in italics or denoted as typical nominal or approximate Characteristic information is rep...

Page 23: ...Conditions The power meter and power sensor meet its specifications when Stored for a minimum of two hours at a stable temperature within the operating temperature range and turned on for at least 30...

Page 24: ...ight N8480 Series power sensors Keysight U2000 Series average USB power sensors Single Sensor Dynamic Range 90 dB maximum Keysight E Series power sensors 50 dB maximum Keysight 8480 Series power senso...

Page 25: ...as the change in the power meter indication over a short time interval usually one minute for a constant input power at a constant temperature Accuracy Instrumentation Absolute accuracy 1 0 02 dB Log...

Page 26: ...t a 8481A b 50 nW 8481B b 50 mW 8481D b 20 pW 8481H b 5 mW 8482A b 50 nW 8482B b 50 mW 8482H b 5 mW 8483A b 50 nW 8485A b 50 nW 8485D b 20 pW R8486A b 50 nW R8486D b 30 pW Q8486A b 50 nW Q8486D b 30 p...

Page 27: ...lude Option CFT b 25 nW N8488A exclude Option CFT b 25 nW N8481B exclude Option CFT b 25 W N8482B exclude Option CFT b 25 W N8481H exclude Option CFT b 2 5 W N8482H exclude Option CFT b 2 5 W N8481A w...

Page 28: ...al U2000 1 2A 60 dBm to 35 dBm 1 5 nW 600 pW 38 dBm to 15 dBm 2 nW 1 5 nW 20 dBm to 9 dBm 12 nW 10 nW 11 dBm to 5 dBm 2 W 500 nW 7 dBm to 15 dBm 4 W 1 W 10 dBm to 20 dBm 6 W 5 W U2004A 60 dBm to 35 dB...

Page 29: ...ed Power sensor Range Zero set internal Zero set external NOTE The zero set specifications are only applicable to Keysight U2000 Series USB power sensors with serial prefixes as shown below U2000A ser...

Page 30: ...se for a particular power sensor with the number of averages set to 16 for normal mode and 32 for x2 mode Use the Noise Multiplier for the appropriate mode normal or x2 and number of averages to deter...

Page 31: ...pW 65 pW Keysight Q8486A d 10 nW 110 nW Keysight Q8486D d 6 pW 65 pW Keysight V8486A d 40 nW 450 nW Keysight W8486A d 40 nW 450 nW Keysight 8487A d 10 nW 110 nW Keysight 8487D d 4 pW 45 pW Keysight E...

Page 32: ...ysight N8482B exclude Option CFT d 3 W 80 W Keysight N8481H exclude Option CFT d 0 3 W 8 W Keysight N8482H exclude Option CFT d 0 3 W 8 W Keysight N8481A with Option CFT d 7 nW 114 nW Keysight N8482A...

Page 33: ...to 75 relative humidity d The zero drift and measurement noise specifications are tested at 50 MHz Table 1 5 U2000 Series power sensors specification Power sensor Range Zero drift a Measurement b noi...

Page 34: ...ght E Series power sensors the measurement noise is measured within the low range Refer to the relevant power sensor manual for further information Table 1 5 U2000 Series power sensors specification c...

Page 35: ...er sensors in normal and x2 speed modes manual filter 10 dB decreasing power step refer to Table 1 7 Auto filter default resolution 10 dB decreasing power step normal and x2 speed modes refer to Figur...

Page 36: ...ger within the range 50 dBm to 17 dBm the settling time is N1913A 10 ms N1914A 20 ms Number of averages 1 2 4 8 16 32 64 128 256 512 1024 Settling time s Normal mode 0 08 0 13 0 24 0 45 1 1 1 9 3 5 6...

Page 37: ...ling time with auto filter 10 dBm 2 dBm 40 ms 120 ms 210 ms 400 ms 4 dBm x2 mode 70 ms 210 ms 400 ms 1 s Normal mode Sensor dynamic range Typical settling times 10 dBm Max dBm Min dBm 70 ms 120 ms 1 s...

Page 38: ...ecreasing power step refer to Table 1 8 Figure 1 4 N8480 Series settling time with auto filter Table 1 8 N8480 Series settling time Number of averages 1 2 4 8 16 32 64 128 256 512 1024 Settling time s...

Page 39: ...s 1 1 When a power step crosses the auto range switch point of the sensor add 25 ms Table 1 9 U2000 Series settling time Number of averages 1 2 4 8 16 32 64 128 256 512 1024 Settling time a s Normal m...

Page 40: ...s 42 s 42 s 4 dBm 10 dBm 20 dBm 30 dBm Normal mode 45 ms 82 ms 1 3 s 1 5 s 450 ms 1 6 s 20 s 24 s 24 s x2 mode Maximum sensor power within a range U2000 1 2 4A U2000 1 2H U2000 1B 20 dBm 40 dBm 12 dB...

Page 41: ...g with the typical maximum measurement speed for each mode Normal 20 readings second x2 40 readings second Fast 1 400 readings second for Keysight E Series power sensors only Maximum measurement speed...

Page 42: ...ogic levels and uses a BNC connector Trigger out optional Output provides TTL compatible logic levels and uses a BNC connector Ground Binding post accepts 4 mm plug or bare wire connection USB host op...

Page 43: ...r Reference is provided for calibration of the E Series 8480 Series and N8480 Series power sensors Power output 1 00 mW 0 0 dBm Factory set to 0 4 traceable to the National Physical Laboratories NPL U...

Page 44: ...1913 1914A Service Guide Battery storage conditions Storage temperature limits 20 C to 60 C 80 RH NOTE Refer to Battery Information Optional on page 90 of Keysight N1913 1914A EPM Series Power Meters...

Page 45: ...e 45 Physical Characteristics Dimensions The following dimensions exclude front and rear panel protrusions 212 6 mm W x 88 5 mm H x 348 3 mm D 8 5 in x 3 5 in x 13 7 in Weight N1913 1914A weight net 3...

Page 46: ...1 Specifications and Characteristics 46 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 47: ...te Equipment List 49 1 mW Power Reference Level Test 51 Output Standing Wave Ratio SWR Test 53 Zero Set Average Path 56 Absolute Accuracy Test Average Path 57 Linearity Average Path 61 This chapter co...

Page 48: ...tio SWR Test on page 53 Zero Set Average Path on page 56 Absolute Accuracy Test Average Path on page 57 Linearity Average Path on page 61 NOTE This document does not provide a complete breakdown for t...

Page 49: ...ent is required for the power reference output the power level must be accurately measured and the uncertainty of this measurement must also be known E4419B E4419A Power Sensor Frequency 50 MHz Amplit...

Page 50: ...Termination DC to 18 GHz 909A BNC Cable Cable Assy Coaxial RG 223 cable 50 Ohm straight BNC male to straight BNC 24 in LG 8120 1839 Calibration Test Cable required for N1913A and N1914A 11730A Sensor...

Page 51: ...meter to the DUT reference Equipment Required test equipment 1 unit of E4419B or E4417A dual channel power meter 1 unit of N8482A power sensor 11730A power sensor cable Either of these E4419B or E4417...

Page 52: ...er reference of the DUT 4 Using all of these values the N7800 Series software will calculate the power reference level of the DUT NOTE The 1 mW reference of the E4419B or E4417A power meter must be pr...

Page 53: ...ment 1 unit of 8753ES ET network analyzer 1 unit of 85032B Type N calibration kit 1 unit of E4419B or E4417A dual channel power meter 2 units of 8481D power sensor 2 units of 11667A 001 power splitter...

Page 54: ...Figure 2 4 Output SWR test setup load connection diagram POWER METER POWER SENSOR Load Port 20 dB TYPE N MALE PORT ATTENUATOR 30 dB ATTENUATOR POWER SPLITTERS Ch A CH B Ch A POWER METER EPM SERIES PO...

Page 55: ...rminate it with the 50 R load from the 85032B calibration kit and repeat the 1 mW power reference level measurement 5 Using all of these values the N7800A Series software will calculate the VSWR of th...

Page 56: ...d returned as the measured value Equipment No test equipment required Test method 1 Execute the internal zero set measurement procedure for channel A 2 Read back the result of the measurement from the...

Page 57: ...easure the power sensor voltage and display the appropriate power level Equipment Required test equipment 1 unit of 3458A digital multimeter 1 unit of 33250A function generator 1 unit of 11683A Option...

Page 58: ...brator to operate properly 11683A range calibrator front panel 11683A range calibrator rear panel BNC T joint connector BNC cable BNC cable Banana connector Banana connector 33250A function generator...

Page 59: ...input and the voltmeter using cables and a BNC T joint connector at the range calibrator 9 Configure the DUT as shown below 10 Configure the voltmeter using the default setup settings NOTE When switch...

Page 60: ...racy of the N1913 1914A in a table as shown below Effective power DC Voltage Voltmeter range Power meter filter voltmeter NRDNS CH A error CH B error Specification 12 dBm 0 00565 V 0 1 V 256 0 5 5 dBm...

Page 61: ...r Equipment No test equipment required Test method 1 Execute the internal linearity measurement procedure for channel A 2 Read back the result of the measurement from the DUT 3 If the DUT model number...

Page 62: ...2 Performance Tests 62 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 63: ...913 1914A EPM Series Power Meters Service Guide 63 3 Adjustments Introduction 64 Power Reference Level Adjustment 65 This chapter contains checks and adjustments that ensure proper performance of the...

Page 64: ...rence level if the performance test has failed Power reference level is controlled by the coarse and fine settings of a digital potentiometer Adjustment of the coarse and fine settings can only be car...

Page 65: ...as per the performance test a If the result is 1 mW then decrement FINE by 1 a If the result is 1 mW then increment FINE by 1 5 Repeat step 4 until the result crosses the 1 mW boundary in either direc...

Page 66: ...3 Adjustments 66 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 67: ...er Meters Service Guide 67 4 Theory of Operation PPMC Assembly 68 Main Board Assembly 69 Calibrator Assembly 70 Front Panel Assembly 71 PSU Assembly 72 This chapter describes how each of the power met...

Page 68: ...USB Stores the power meter firmware in flash EEPROM Stores the power meter serial number and option data Inputs Power supplies from PSU via main board Control and data lines from main board and front...

Page 69: ...erialiser for the LCD display Provides signal routing between the PPMC and front panel Inputs Power supplies from PSU Sensed power level s from sensor flex s Trigger input from external equipment Cont...

Page 70: ...ator Assembly Purpose Provides a 1 mW 0 dBm power reference level at 50 MHz Inputs Power supplies from PSU via main board Control address and data lines from PPMC Outputs 1 mW 0 dBm power reference to...

Page 71: ...ference connectors Option 101 Inputs Power supplies from PSU via main board Front panel control interface from the PPMC LVDS LCD control lines via main board Front USB port available for Option 008 th...

Page 72: ...Purpose Provides various DC power supplies Inputs 100 Vac 240 Vac 50 Hz 60 Hz 150 VA Max from an external source Control lines from front panel via main board Outputs PSU Charger Battery Switching reg...

Page 73: ...duction 74 Power Up Problems 74 Instrument Self Test 75 Extended Self Test 76 Performance Test 76 Power Reference Level Adjustment Problems 76 Communication Interface Failures 77 Additional Diagnostic...

Page 74: ...amage Check that the line module fuse in the instrument is operational Basic internal checks Check reseat the cable between the line module and the PSU Check reseat the cable between the PSU and the m...

Page 75: ...ility Main board low probability Fan Verifies that the fan is working Check reseat the cable between the fan assembly and the main board Check visually if the fan is functioning Fan assembly high prob...

Page 76: ...ctive keymat or key flex circuit Bitmap display Verifies that all pixels in the display can be illuminated in various colors Not applicable Front panel defective display display interface board or inv...

Page 77: ...ication Check visually to see whether or not the connector is obstructed damaged PPMC assembly Type of functionality Reason Recommended test method Possible faults USB LAN functionality The N7800 Seri...

Page 78: ...5 Troubleshooting Guide 78 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 79: ...ly Instructions 113 Disassembly vs Part Replacement 117 Front Panel Disassembly Instructions 119 Front Panel Reassembly Instructions 124 Additional Repair Notes 128 Main Board vs Rear Panel Assembly 1...

Page 80: ...Required 3 Disassembly Instructions 4 Reassembly Instructions 5 Disassembly vs Part Replacement 6 Front Panel Disassembly Instructions 7 Front Panel Reassembly Instructions 8 Additional Repair Notes 9...

Page 81: ...ar panel Keysight part number Description Visual N1914 60200 N1914 60201 Front panel assembly front calibrator option Front panel assembly Front calibrator Front panel assembly Front calibrator and US...

Page 82: ...k front panel dress label 1 unit of N1913A nameplate N1913 67300 N1912 21003 6960 0024 N1912 00027 N1913 34300 N1913A Rear connectors option 2 units of PLUG HOLE TR HD FOR 688 D HOLE NYL 1 unit of fro...

Page 83: ...assembly Note The same assembly is used for all four sensor positions The sensor flex assembly is supplied straight and so it must be folded to match the assembly being replaced see Additional Repair...

Page 84: ...ysight N1913 1914A Service Guide N1914 34302 N1912 00027 Label dual channel Rear cal Label Dual N1913 34300 N1914 34300 N1913A name plate N1914A name plate Keysight part number Description Visual N191...

Page 85: ...N1913 40200 Front panel Note This front panel sub frame is used on all variants of the front panel assembly N1913 36600 Display support Note This display support molding is used on all variants of th...

Page 86: ...cuit is used on all variants of the front panel assembly N1912 20005 Window EMI shield Note This EMI Shielded Window is used on all variants of the Front Panel Assembly N1913 00600 EMI screen Note Thi...

Page 87: ...arp display Note This display is used on all variants of the front panel assembly Front view Rear view N1912 60002 Display interface board Note This display interface board is used on all variants of...

Page 88: ...1 output Note This inverter interface board is used on all variants of the front panel assembly N1912 61002 Cable assembly backlight Note This backlight cable is used on all variants of the front pane...

Page 89: ...assembly is only available for Option 105 106 and 167 N1913 68301 Single N1913 68302 Dual USB assembly Single USB assembly Dual 8121 0936 Flat Ribbon Assy 28 AWG 30 COND 03 IN LG Note This flat ribbon...

Page 90: ...assembly Keysight part number Description Visual N1913 66502 N1913A mother board New N1914 66502 N1914A mother board New Note Refurbished main boards are not available The part number for the Lithium...

Page 91: ...same assembly is used for both N1913A and N1914A models N1913 66501 Tested single channel processor peripheral component interconnect mezzanine card PCA comes pre programmed with N1913A firmware N191...

Page 92: ...0105 Battery option 0950 5015 N1913 34102 PSU New Deck assembly Deck assembly Battery option Power supply AC DC Adapter 120 WATT 1 OUTPUT Power supply cover N1913 37900 Battery pack N1913 61301 N1913...

Page 93: ...scription Visual N1913 00200 Rear panel assembly New Revised rear panel assembly New Note The rear panel assembly must be customized to suit the hardware configuration of the unit being repaired Refur...

Page 94: ...Sensor 1 unit of rear panel plug Calibrator 6960 0081 6960 0024 6960 0178 N1913A Rear connectors option 1 unit of sensor flex assembly 1 unit of N type connector 1 unit of lock washer 1 unit of Hex n...

Page 95: ...ation parts Keysight part number Description Visual E4418 20009 E4418 00016 2950 0132 3050 0916 N Type connector Lock washer Hex nut Washer N1913 67300 N1913 67301 Sensor flex assembly E4418 61015 Rec...

Page 96: ...12 BNC option 6960 0081 6960 0024 6960 0178 N1913 36200 N1913 36201 N1913 36202 BNC plug rear panel Sensor plug front and rear panels Calibrator plug rear panel USB plug front panel USB plug rear pane...

Page 97: ...Repair Guide 6 Keysight N1913 1914A Service Guide 97 Additional spare parts Keysight part number Description Visual N1913 62700 Line module assembly N1913 67910 VGA option...

Page 98: ...13 1914A Service Guide N1912 00016 Spring contact Perpendicular N1913 61601 N1913 61600 N1913 60002 Wire hardness assembly 10 to10 Pins Ribbon cable assembly 6 to 4 Pins PCA Battery charger Keysight p...

Page 99: ...r assembly Front Front connectors option For more information on the improved calibrator assembly refer to Improved calibrator assembly on page 100 N1911 61002 Calibrator assembly Rear connectors opti...

Page 100: ...or for a better fit with the front panel assembly as shown in Figure 6 1 The calibrator plug N1912 21003 will not be needed with the improved calibrator assembly Figure 6 1 Calibrator assembly and imp...

Page 101: ...3 1914A Service Guide 101 Outer housing components Keysight part number Description Visual N1913 30100 N1913 30101 Top clamshell Non battery option Top clamshell Battery option 5041 7718 Clamshell Bot...

Page 102: ...6 Repair Guide 102 Keysight N1913 1914A Service Guide 34401 86020 Bumper kit 34401 45021 Handle Keysight part number Description Visual...

Page 103: ...ite Tubing heat shrink 9 5 mm EXP ID 4 80 mm RCVD ID 0 56 mm WTHKNS Note If the semi rigid cable is replaced then the split ferrite must be positioned correctly see Additional Repair Notes on page 128...

Page 104: ...34 Nm 3 lb in T6 T8 T10 and T20 Torx screwdriver bits 7 16 break spanner calibrated to 2 37 Nm 21 lb in 5 16 break spanner calibrated to 1 02 Nm 9 lb in 9 32 socket N1912 61807 Special tooling kit Con...

Page 105: ...to clamshell T20 screwdriver 2 37 Nm Attach PPMC assemblies to main board T8 screwdriver 0 56 Nm Fit calibrator semi rigid both ends Option 003 5 16 spanner 1 02 Nm Attach earth wires nut 9 32 socket...

Page 106: ...model N1913A and N1914A i e dual channel with front panel sensor and power reference connectors N1913A N1914A Remove the handle Rotate it to the vertical position Pull both sides outwards from the bo...

Page 107: ...clamshell Figure 6 3 Remove the top clamshell Remove the PSU safety cover Figure 6 4 Use the T10 Torx screwdriver bit to remove the four screws attaching the PSU safety cover to the top clamshell Lif...

Page 108: ...ight N1913 1914A Service Guide Remove the PSU Figure 6 5 Use the T10 Torx screwdriver bit to remove the six screws attaching the PSU to the top clamshell Lift and remove the PSU Figure 6 5 Remove the...

Page 109: ...ger BNC With reference to Figure 6 6 Lift and remove the cable clamp Disconnect the cable attaching the fan assembly to the main board Lift and remove the fan assembly Disconnect the sensor RF connect...

Page 110: ...order Figure 6 7 Remove the EMI earth wires Disconnect the front panel cable Figure 6 8 Depress both sides of the connector holding the ribbon cable to eject it Figure 6 8 Disconnect the front panel c...

Page 111: ...MC assembly Disconnect the ribbon cable from the main board whilst leaving it connected to the PPMC assembly Remove the PPMC assembly Figure 6 11 Use the T8 Torx screwdriver bit to remove the screws a...

Page 112: ...ing the earth wires to the line module Remove the earth wires and washers taking note of the assembly order Lift and remove the main board Figure 6 12 Remove the main board Remove the rear panel Figur...

Page 113: ...tor from the PSU must be pushed firmly to fully engage it Take care not to trap any cables when fitting the top clamshell Analog recorder output connections Figure 6 14 Ensure that recorder 1 is plugg...

Page 114: ...air Guide 114 Keysight N1913 1914A Service Guide 1 J112 USB rear 2 J1 VGA 1 J109 Calibrator 2 P71 Trig Out 3 P70 Trig In 4 J115 USB front Figure 6 15 Sensor flex connections Instructions Visual 1 2 1...

Page 115: ...N1913 1914A Service Guide 115 PSU screw locations Figure 6 16 A Attach PSU to clamshell 4 screws B Attach PSU cable guide 1 screw C Attach PSU safety cover 4 screws Figure 6 16 PSU screw locations In...

Page 116: ...116 Keysight N1913 1914A Service Guide PSU cable routing Figure 6 17 Ensure the PSU cables are positioned such that the cable guide does not trap them or pinch them Figure 6 17 PSU cable routing Instr...

Page 117: ...ers and top clamshell including PSU Disconnect the main board ribbon cable from the PPMC Disconnect the service connector cable from the PPMC Dismantle rear USB assembly N1913 68301 or N1913 68302 if...

Page 118: ...onnect calibrator semi rigid from the rear panel assembly Disconnect the calibrator assembly cable connection from the main board Disconnect the EMI earth wires from the calibrator assembly Disconnect...

Page 119: ...ed in a clean and dust free environment Failure to do so may introduce contamination between the EMI shielded window and the display Also note that it may not be necessary to completely disassemble th...

Page 120: ...cable for calibrator assembly with the calibrator plug For more information on the improved calibrator assembly refer to Improved calibrator assembly on page 100 Step 2 Use Circlip pliers to remove N1...

Page 121: ...panel sub frame and display support molding together situated beside the key flex circuit and carefully pull them apart to separate them Step 5 Remove the four screws that are attached to the display...

Page 122: ...ched to the calibrator assembly from the display support molding and separate them from one another Note Take care not to damage the EMI spring fingers on the calibrator assembly Step 8 Disconnect the...

Page 123: ...EMI Screen to the front panel sub frame and separate them from one another Step 11 Disengage the rubber tabs that are attached to the key flex circuit from the keymat and carefully lift it out Step 12...

Page 124: ...tions Visual Step 1 Insert the keymat into the front panel sub frame Step 2 Insert the EMI shielded window into the keymat ensuring that it is clean and free from fingerprints Step 3 Overlay the key f...

Page 125: ...the display interface board onto the plastic mounting lugs on the display support molding Step 6 Attach the inverter board to the display interface board using the two screws removed earlier Step 7 C...

Page 126: ...fully spread the EMI fingers outwards ensuring they extend beyond the edges of the hole in which the calibrator assembly is fitted Step 10 Fit the split washer to the calibrator assembly Step 11 Attac...

Page 127: ...engaged to hold it securely Step 14 Connect the flex cable to the display interface board and then tighten the locking tab Step 15 Re fit the calibrator plug This step is only applicable for calibrato...

Page 128: ...Notes Replacing the sensor flex assembly The sensor flex assembly is supplied straight Do not bend the sensor flex cable NOTE Route and connect the sensor flex assembly Once the sensor flex assembly...

Page 129: ...board revision 102 and revision 103 there are two different rear panels Revision 102 main boards are not available as spares all spare main boards will be revision 103 or newer When replacing a revisi...

Page 130: ...assembly via the command SERV SNUM CHARACTER DATA Instrument option s This these can be stored in the PPMC assembly via the command SERV OPT CHARACTER DATA Refer to the Keysight N1913 1914A EPM Series...

Page 131: ...ion the ferrite such that it s furthest edge is 120 mm 4 from the bend of the semi rigid Hold the ferrite in place by applying a coating of silicone or silicone rubber compound e g RTV along that 20 m...

Page 132: ...6 Repair Guide 132 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 133: ...ng Keysight Technologies Introduction 134 Before Calling Keysight Technologies 135 Check the Basics 136 Instrument Serial Numbers 137 Returning Your Power Meter for Service 138 Useful Web Pages 139 Th...

Page 134: ...Before Calling Keysight Technologies on page 135 This section contains a checklist that helps identify some of the most common problems If you wish to contact Keysight Technologies to enquire about th...

Page 135: ...meter is covered by a separate maintenance agreement please be familiar with the terms Keysight Technologies offers several maintenance plans to service your power meter after warranty expiration Call...

Page 136: ...et has power Check that the power meter is plugged into the proper AC power source Check that the power meter is switched on Check that the line fuse is in working condition Check that the other equip...

Page 137: ...d to the rear of each Keysight Technologies instrument This label has two instrument identification entries The first provides the instruments serial number and the second provides the identification...

Page 138: ...on all sides of the power meter for packing material Surround the power meter with at least three to four inches of packing material or enough to prevent the power meter from moving in the carton If p...

Page 139: ...epm Product Manuals http www keysight com en pd 1659613 pn N1913A epm series single channel power meter pm PL nid 536902901 899990 c c MY lc eng Product Firmware http www keysight com main software js...

Page 140: ...7 Contacting Keysight Technologies 140 Keysight N1913 1914A Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK...

Page 141: ...is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2009 2016 Edition 14 November 18 2016 Printed in Malaysia N1913 90009 N1913 90009...

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