Rohde & Schwarz NGMO1, Service Manual

Page 1: ...Service Manual Power Supply NGMO1 and Power Supply NGMO2 192 1500 21 and 192 1500 24 5707 2571 82 ...

Page 2: ...permis sion from ROHDE SCHWARZ GmbH Co KG Disclosure or reproduction of this documentation utilization and communication of its contents is not permitted without express approval Infringements will lead to claims for compensation All rights reserved in the event of patents being granted or registration of a protected design 2013 Rohde Schwarz GmbH Co KG Muehldorfstr 15 81671 Munich Germany Phone 4...

Page 3: ...ld only be performed by qualified technical personnel 4 For permanently installed units without built in fuses circuit breakers or similar protective de vices the supply circuit must be fused such as to provide suitable protection for the users and equipment 5 Prior to switching on the unit it must be ensured that the nominal voltage set on the unit matches the nominal voltage of the AC supply net...

Page 4: ... must not be exposed to high temperatures or fire Keep batteries away from children If the battery is replaced improperly there is danger of explosion Only replace the battery by R S type see spare part list Lithium batteries are suitable for environmentally friendly disposal or specialized recycling Dispose of them in appropriate containers only Do not short circuit the battery 12 Equipment retur...

Page 5: ...pare Parts and Test Equipment 2 1 3 Safety 3 1 3 1 General 3 1 3 2 Safety Instructions 3 1 4 Unit Description 4 1 4 1 Introduction 4 1 4 2 Function Description 4 2 4 2 1 Prozessor Board 4 2 4 2 2 Keyboard Display 4 3 4 2 3 Analog Boards CHN A and B 4 3 5 Operation 5 1 6 Maintenance 6 1 6 1 General 6 1 6 2 Maintenance Intervals 6 1 6 3 Calibration Intervals 6 1 6 4 Cleaning 6 2 7 Calibration 7 1 7 ...

Page 6: ... in the Display 8 15 8 3 Checking the Output Voltages 8 16 8 3 1 Processor Board 8 16 8 3 2 Analog Boards 8 17 8 4 General Troubleshooting 8 18 9 Removal and Installation of Assemblies 9 1 9 1 Removal of Assemblies 9 2 9 1 1 Removing the Housing 9 2 9 1 2 Removing of the Analog Board Y101 Y102 9 3 9 1 2 1 Analog board Y101 Channel A 9 3 9 1 2 2 Analog board Y102 Channel B 9 3 9 1 3 Removing of Key...

Page 7: ... NGMO 10 1 OUTPUT A OUTPUT B Channel A Channel B 10 2 10 2 CONTROL I O Relay Connector SUB 15 Male 10 3 11 Bill of Materials 11 1 12 Software Update 12 1 12 1 Components List 12 1 12 2 Running the Update 12 1 3 00 05 2014 3 ...

Page 8: ...peration elements 5 1 Fig 5 2 Power Supply NGMO2 Connections on rear side of unit 5 4 Fig 7 1 Calibration adapter 7 1 Fig 7 2 Power Supply NGMO Calibration set up 7 2 Fig 8 1 Test set up for Control I O test 8 10 Fig 8 1 Test set up for INHIBIT ON test 8 12 Fig 8 3 NGMO Output plug 2 pcs 8 12 Fig 10 1 Power Supply NGMO2 non standardized interfaces 10 1 4 3 00 05 2014 ...

Page 9: ... consists of the following assemblies Keyboard with LC Display Processor board Analog board for Channel A Power supply unit 1 1 2 NGMO2 The NGMO2 is equipped with two analog boards and therefore delivers two separate voltage sources and signal channels Apart from that the Power Supplies are absolutely identical 1 2 Purpose of the Handbook The Service Handbook provides the information necessary for...

Page 10: ...s as necessary with information on national health and safety regulations and environmental regulations 1 3 Important User Notes NOTE Only personnel authorized by ROHDE SCHWARZ may open the Power Supply NGMO If the safety regulations for the Power Supply NGMO are disre garded ROHDE SCHWARZ GmbH Co KG will not assume liability for any resulting damage and all warranties will become null and void Wh...

Page 11: ...the Power Supply NGMO safety regulations must be observed Certain sections of the text are highlighted as follows Danger Failure to follow instructions can result in personal injury ELECTROCUTION HAZARDS Observe the relevant safety regulations when operating electri cal devices WARNING Failure to follow the instructions could damage the Power Supply NGMO ATTENTION Failure to follow the instruction...

Page 12: ...Power Supply NGMO User Information 1 4 3 00 05 2014 ...

Page 13: ...is Rohde Schwarz equipment please call us we will be glad to help Our team will discuss your queries and look for solutions to your prob lems Customer Support Center Phone 49 89 4129 12345 E mail customersupport rohde schwarz com 2 1 2 Ordering Spare Parts and Test Equipment The spare parts and test equipments required for the Power Supply NGMO can be ordered from the following address Customer Su...

Page 14: ...Power Supply NGMO Customer Service 2 2 3 00 05 2014 ...

Page 15: ... will become null and void 3 2 Safety Instructions ELECTROCUTION HAZARDS Observe the relevant safety regulations when operating electri cal devices Prior to working on the Power Supply NGMO it is to be isolated from the mains power supply WARNING Failure to follow the instructions could damage the Power Supply NGMO Do not bridge defective fuses Defective fuses must strictly be replaced with fuses ...

Page 16: ...Power Supply NGMO Safety 3 2 3 00 05 2014 ...

Page 17: ... channels NGMO2 only NGMO1 only Channel A which can be used as the following high speed voltage source programmable DC load precise digital multimeter sampling oscilloscope This unit fulfils all requirements of latest electronic battery powered communication products The high speed and the high reliability are features which are very im portant in a production environment The NGMO is an ideal devi...

Page 18: ... and filtered on the processor board Each of the two power supplies delivers three non stabilized direct voltages approx 8 VAC 16 VAC 21 VAC via the lateral connectors to the analog boards A separate winding of one of the two transformers generates the processor supply voltage 5 VDC and stabilizes it on the board On the processor board all di rect voltages are indicated by LEDs The alternating vol...

Page 19: ...MO2 only are electrically of identical design and offer the following functions beside the typical functions of a mains supply unit Adjustable output impedance fast Push Pull output stage with reversible bandwidth electronic load current sink high measuring and adjustment accuracy quick sampling of output currents and of DVM voltage with a sam pling frequency of up to 100kHz transient measurement ...

Page 20: ...s over the control of the board and the real time evaluation of the measuring values All measurements are accomplished via a fast 16Bit A D converter with a series connected multiplexer various D A converters are used to ad just the output variables 4 4 3 00 05 2014 ...

Page 21: ...Unit Description Power Supply NGMO Fig 4 2 Power Supply NGMO Function block diagram 3 00 05 2014 4 5 ...

Page 22: ...Power Supply NGMO Unit Description 4 6 3 00 05 2014 ...

Page 23: ...on elements for channel B must in this case be ignored Readings in the LC Display correspond with the respective Power Supply Fig 5 1 Power Supply NGMO2 Operation elements Function element Type Function pushbutton POWER This is the mains switch to turn the NGMO on and off rotary knob VARIATION This knob has various functions to increase or decrease numerical values in a menu function to select opt...

Page 24: ...want and if necessary modified by pressing the SHIFT key or by turning the variation knob key 3 Overvoltage protection By pressing the OVP key you can set the max force output voltage with respect to the internal ground If the voltage peaks exceed the set value the NGMO switches off automatically to protect the unit under test key 4 SAVE With the SAVE key all settings can be stored in one of the m...

Page 25: ...recall all settings stored in memory locations 1 to 9 Memory location 0 contains the factory default settings which can not be modified key 0 LOCAL With the LOCAL key the unit operation can be switched from remote control back to local control key SHIFT When the second function of the SHIFT key is selected numerical values and a decimal point can be entered Cancel a selected function by pressing t...

Page 26: ...nel A DVMA in 2 Output Channel B DVMB in 3 Mains Connector 4 Mains Voltage Selector 5 USB Interface Connector 6 IEEE 488 2 Interface Connector 7 RS232 Interface Connector 8 Control I O Connector 9 Switches for software update The assignment of the non standardized connections Output A Out put B and Control I O is described in chapter 10 5 4 3 00 05 2014 ...

Page 27: ... not been pressed and shows OFF 2 Check that the Mains Voltage Selector 4 Fig 5 2 is set to the appropriate line voltage 3 Connect the female end of the power cable to the AC receptacle on the rear panel 4 Connect the Power Supply NGMO to the AC line 5 Press the push button Power on the front panel 5 3 2 Main Functions of the NGMO When the NGMO2 is powered up it displays the following start up inf...

Page 28: ... device Az type of power supply board mounted at location A in the NGMO Currently only type 3 is available Bz type of power supply board mounted at location B in the NGMO2 Currently only type 3 is available For further information concerning the settings on the Power Supply and the readings in the display please refer to the Operator Manual for the Power Supply NGMO1 NGMO2 5 6 3 00 05 2014 ...

Page 29: ...rvals The following table shows the different activities concerning care maintenance and inspection to be performed on the Power Supply NGMO at the specified intervals Maintenance interval Maintenance tasks Service point depending on degree of soiling clean Unit Visual inspection before start up Check connecting cables incl connections for damage and tight fit Cables and connections 2 years Check ...

Page 30: ...enance 6 4 Cleaning The following devices and materials are recommended for cleaning the Power Supply NGMO soft lint free cloths Attention Do not use aggressive cleaning agents to clean the Power Supply NGMO 6 2 3 00 05 2014 ...

Page 31: ...ration adapter Rohde Schwarz Cologne 3544 3544 00 2 15pin D Sub plug plug interface cable Scope of delivery of the calibration adapter Rohde Schwarz Cologne 3 Digital voltmeter Accuracy 0 001 7 1 1 Calibration Adapter Accessories Fig 7 1 Calibration adapter NOTE The calibration adapter is an option available on request 3 00 05 2014 7 1 ...

Page 32: ...Power Supply NGMO Calibration 7 2 Calibration Set up Fig 7 2 Power Supply NGMO Calibration set up 7 2 3 00 05 2014 ...

Page 33: ...perating temperature NOTE The following process describes the calibration for channel A 1 Prepare the test set up as shown in Fig 7 2 2 Switch on NGMO acc to section 5 3 DVM and Calibration adapter 3 Press key CHN to switch to channel A The display must show the following AS x xxxV y yyyA A OFF 4 Press key MENU 5 Turn rotary knob VARIATION to select menu option A38 6 Press ENTER The display must s...

Page 34: ...coun ter yy mm dd is the date of the last calibration for the selected channel yy specifies the calibration year mm is the calibration month dd is the calibration day 8 Press ENTER The display must show the following Enter calibration entry ID NOTE The calibration entry ID is identical for both channels The calibration entry ID is a number not longer than 8 digits which acts as a password when you...

Page 35: ...s the SHIFT key instead of entering a number NOTE When using the calibration set up specified in section 7 2 the following display may be neglected After entering the Entry ID the display should show the following Remove all loads and and connect cal Adapter 9 Press ENTER NOTE When using the calibration set up specified in section 7 2 the following display may be neglected The display must show th...

Page 36: ...e variation knob or numerical entry keys to enter the measured value that is displayed on the DVM 14 Press ENTER NOTE When using the calibration set up specified in section 7 2 the following display may be neglected The display must show the following Connect known 1 Ohm Resistor to out term 15 Press ENTER The display must show the following Enter exact Resistor value x xxxx Ohms NOTE The values o...

Page 37: ...Ohm Resistor to out term 18 Press ENTER The display must show the following Enter exact Resistor value 3x xxx Ohms NOTE The values of the resistors installed in the calibration adapter can be taken from the calibration certificate supplied with the calibration adapter 19 Enter the resistance value Use either the variation knob or numerical entry keys to enter the exact resistor value 20 Press ENTE...

Page 38: ...ms NOTE The values of the resistors installed in the calibration adapter can be taken from the calibration certificate supplied with the calibration adapter 22 Enter the resistance value Use either the variation knob or numerical entry keys to enter the exact resistor value 23 Press ENTER The display must show the following Remove cal adapter from output term A 24 Press ENTER 7 8 3 00 05 2014 ...

Page 39: ...Enter the Date Use the variation knob and the arrow keys to enter the current date The display must show the following Calibration success fully completed The calibration procedure must be repeated for the other channel NGMO2 only This can be done in the following way 26 Connect calibration adapter to output terminal B 27 Press the CHN A B DVM key once Channel B 28 Select Menu Item B38 29 Repeat a...

Page 40: ... following procedure voids your calibration certificate if it is from Rohde Schwarz 1 Switch off the NGMO and remove all connectors from the NGMO including the power cord 2 Remove the four screws in the rear feet of the NGMO see section 9 1 1 3 Remove the main shielding ELECTROCUTION HAZARDS The next steps expose you to hazardous voltages Proceed with care Observe the relevant safety regulations r...

Page 41: ...f you press the ENTER key the current calibration entry ID will be overwritten with a zero Any other key aborts this function 7 Remove the calibration entry ID jumper 8 Switch off the NGMO and remove the power cord 9 Replace the main shielding on the device and mount the four feet to the rear of the device see section 9 2 5 3 00 05 2014 7 11 ...

Page 42: ...Power Supply NGMO Calibration 7 12 3 00 05 2014 ...

Page 43: ...using the Service Functions Power Supply NGMO Vers 1 00 has the following service functions integrated which can be called up via special IEEE or serial commands COM These service functions are on the one hand used to test the installed interfaces and on the other to test the following functions and assem blies and to make the following adjustments Set electronic serial number Set NGMO device name...

Page 44: ... 31 beforehand Apart from that the serial interface parameters must be adapted to the parameters of the controlling computer Hyper terminal All service commands start with the character string rus service These are specific for the service and should therefore be treated confidentially The following sections specify the additional commands which were implemented in addition to the standard command...

Page 45: ...program the serial number Setting input After replacing the processor board this replacement board must be reprogrammed to the serial number of the unit located on the back of the unit Enter the serial number using the following remote command rus service set device serial number SERIAL_NUMBER _STRING Instead of the SERIAL_NUMBER_STRING you must enter the serial number of the unit as it is printed...

Page 46: ...an occurring fault Reprogram the device name Setting input After replacing the processor board the device name must be repro grammed if the name displayed when switching on does not match the designation on the front panel Enter the device name using the following remote command rus service set ngmo name NGMO NAME Instead of NGMO NAME enter the device name e g NGMO2 as printed on the front panel o...

Page 47: ...st NUMBER The test number may be any number between 0 and 65535 Read out the test number with the following remote command rus a service slave comm test Fault rectification If an error occurs Replace the analog board as described in chapter 9 or replace the processor board as described in chapter 9 8 1 4 2 Commands for channel B Function test Fault rectification Send the test number with the follo...

Page 48: ...second command interrogation command is used to deter mine whether the test was successfully completed The interroga tion command will keep on returning 65535 until the user either presses the ENTER key or any other key on the unit ENTER The display shows the following message User Input Test OK The interrogation command returns 0 Any other key The display shows the following message User Input Te...

Page 49: ... test The second command interrogation command is used to deter mine whether the test was successfully completed The interroga tion command will keep on returning 65535 until the user either presses the ENTER key or any other key on the unit ENTER The display shows the following message User Input Test OK The interrogation command returns 0 Any other key The display shows the following message Use...

Page 50: ...n pressing the SHIFT and ENTER keys the words SHIFT and ENTER and in case of the arrow keys the corresponding arrow symbol should appear When pressing one of the keys again the corresponding field is displayed again in grey Switch on test 3 with the following remote command rus service select function test 3 The display shows the following message Keyboard Knob Test Press every key After this grey...

Page 51: ...t 9 OCP 8 key Bit 8 I SET 7 key Bit 7 OUTP ON OFF 6 key Bit 6 MENU 5 key Bit 5 SAVE 4 key Bit 4 OVP 3 key Bit 3 U SET 2 key Bit 2 CHN A B DVM 1 key Bit 1 LOCAL 0 key Bit 0 If the rotary transducer is turned anti clockwise and clockwise while all keys are pressed the value 0 will finally be returned Fault rectification If an error occurs Replace the keyboard as described in chapter 9 or replace the...

Page 52: ...ol I O test checks the functionality of the signals on the Control I O plug on the back NGMO For this purpose the NGMO calibration adapter must be connected as shown in Fig 8 1 for the following test Test set up Fig 8 1 Test set up for Control I O test 8 10 3 00 05 2014 ...

Page 53: ... function test If no error is present the returned value of the function should be 0 Function test The following bits are set when Slave I O fault channel B Bit 9 Slave I O fault channel A Bit 8 Relay4 TRIGG_A fault Bit 3 Relay3 INHIB_A fault Bit 2 Relay2 TRIGG_B fault Bit 1 Relay1 INHIB_B fault Bit 0 Fault rectification In case of an occurring fault replace the processor board as described in cha...

Page 54: ...equires the following test set up Test set up Fig 8 2 Test set up for INHIBIT ON test Test equipment Fig 8 3 NGMO Output plug 2 pcs Plug both MGMO output plugs see chapter 11 onto the two outputs of the NGMO2 Output A and Output B The following connections see photo opposite must be available on the NGMO output plug Force with Sense and Force with Sense 8 12 3 00 05 2014 ...

Page 55: ... the following message Inhibit ON test all outputs OFF Interrogate test 5 rus service select function test The return value of this function is always 0 On both outputs A and B 0 V must be applied to Force Force see Fig 8 2 Fault rectification In case of an occurring fault Replace the analog board as described in chapter 9 or replace the processor board as described in chapter 9 Check the calibrat...

Page 56: ...e following function switches the test functions off again The NGMO is again ready for normal use Switch off the test functions with the following remote command Rus service select function test 0 The Power Supply NGMO returns to its initial state 8 14 3 00 05 2014 ...

Page 57: ...splayed if a checksum error has occurred in the program for the DSP on the analog board Processor board The error can possibly be rectified by reprogramming the NGMO firmware see chapt 12 FATAL internal error Selftest CHN A FATAL internal error Selftest CHN B These messages are displayed if one of the DSPs on the analog board reports a self test error Analog board A or B Communication with the ana...

Page 58: ... the supply voltages from power supply unit A 4 LEDs to display the supply voltages from power supply unit B 5 F703 fine wire fuse T800H 250V 6 Connection to the primary windings of power supply transformer B 7 F704 fine wire fuse T800H 250V 8 F701 fine wire fuse T800H 250V 9 Connection to the primary windings of power supply transformer A 10 F702 fine wire fuse T800H 250V 11 Connection to the vol...

Page 59: ...Repair Power Supply NGMO 8 3 2 Analog Boards LEDs to display the operating voltage on the analog boards The upper analog board is only used in the Power Supply NGMO2 3 00 05 2014 8 17 ...

Page 60: ...e see chapter 2 NGMO does not deliver output voltage on one channel On one power supply unit the corresponding fuses have been blown by overvoltage at the power supply input LEDs for operating voltage assigned to one of the mains supply units on the processor board do not light see section 8 3 1 LEDs for operating voltage on one of the processor boards do not light see section 8 3 1 Fault still pr...

Page 61: ...ribe the procedures for removing and installing assemblies using the Power Supply NGMO2 as an example This version is equipped with two analog boards Channel A and Channel B The instructions for removal and installation apply also for the NGMO1 in which case the removal and installation process is reduced to analog board Channel A All descriptions and specifications concerning channel B must be ig...

Page 62: ...emblies 1 Analog board Channel B Y102 2 Analog board Channel A Y101 3 Keyboard Y202 4 Processor board Y301 5 Fan A B 9 1 1 Removing the Housing 1 Unscrew the screws from the rear 1 2 3 4 and pull the housing off to the rear A TORX screwdriver TX 20 is required 9 2 3 00 05 2014 ...

Page 63: ...1 Analog board Y101 Channel A 1 Pull off plug X501 22 for fan A 2 Unscrew the screws of analog board Y101 Channel A 12 to 21 3 Remove the board 9 1 2 2 Analog board Y102 Channel B 1 Pull off plug X501 11 for fan B 2 Unscrew the screws of analog board Y102 Channel B 1 to 10 3 Remove the board 3 00 05 2014 9 3 ...

Page 64: ...ation of Assemblies 9 1 3 Removing of Keyboard Y202 Front Panel 1 Unscrew the screws on the front panel 1 2 3 4 2 Fold the front panel carefully down 3 Pull off plugs X101 X102 and X103 5 6 7 4 Unscrew the screws 8 9 10 11 9 4 3 00 05 2014 ...

Page 65: ...ssemblies Power Supply NGMO 9 1 4 Removing of Processor Board Y301 1 Pull off plugs X101 1 X703 2 X801 3 X805 4 X705 5 X706 6 X704 7 2 Unscrew screw 8 from the cooling plate of the LM2940CT 3 Unscrew screws 9 to 16 3 00 05 2014 9 5 ...

Page 66: ...screw the screws from CONTROL I O IEEE 488 2 and RS232 21 to 26 6 Fold the rear wall carefully down 7 Take out the processor board 9 1 5 Removing of Fans A B 1 To remove the fan disassemble the corresponding analog board as described in section 9 1 2 2 Unscrew the screws for the corresponding fan 3 Pull the fan up to remove 9 6 3 00 05 2014 ...

Page 67: ...ining screws 12 to 21 4 Connect plug X501 22 for fan A 9 2 1 2 Analog board Y102 Channel B 1 Carefully insert the board into the connection on the processor board 2 Press the board slightly down at the points marked B and locate it with the four lateral screws 3 4 7 8 3 Fasten the board with the remaining screws 1 to 10 4 Connect plug X501 11 for fan B 9 2 2 Installation of the Keyboard Y202 For i...

Page 68: ...to 20 to the frame 5 Fasten CONTROL I O and IEEE 488 2 plug connections with screws 23 to 26 to the rear wall 6 Fasten the board with the remaining screws 9 to 16 7 Connect plugs X101 1 X703 2 X801 3 X805 4 X705 5 X706 6 X704 7 to the board 8 Fasten the LM2940 CT cooling plate with screws 8 to the frame 9 2 4 Installation of Fans A B The corresponding analog board must be removed before installing...

Page 69: ...analog boards Channel A and Channel B The NGMO1 is equipped with only one analog board Channel A All descriptions and specifications concerning channel B must be ignored This chapter describes the non standardized interfaces in the picture surrounded by frames Fig 10 1 Power Supply NGMO2 non standardized interfaces 3 00 05 2014 10 1 ...

Page 70: ...Supply NGMO Interfaces 10 1 OUTPUT A OUTPUT B Channel A Channel B Pin Function 1 DVM input 2 DVM input 3 FORCE output 4 FORCE output 5 SENSE input 6 SENSE input 7 FORCE output 8 FORCE output 10 2 3 00 05 2014 ...

Page 71: ... VDC 200 mA max 5 FAULT output fault signal open collector 28 VDC 200 mA max 6 NC not used not used 7 NC not used not used 8 GND GND signal GND 9 GND GND signal GND 10 INHIBIT_B input external inhibit signal TTL 0 12 VDC 11 TRIGGER_B input external inhibit signal TTL 0 12 VDC 12 INHIBIT_A input external inhibit signal TTL 0 12 VDC 13 TRIGGER_A input external inhibit signal TTL 0 12 VDC 14 COMPL_B ...

Page 72: ...Power Supply NGMO Interfaces 10 4 3 00 05 2014 ...

Page 73: ... board Channel B Rohde Schwarz Cologne 5707 2488 02 4 Keyboard with LC Display Rohde Schwarz Cologne 3544 3521 00 5 Fan fan cable and plug prefabri cated for installation Rohde Schwarz Cologne 5707 2288 00 6 Calibration adapter incl output control I O connecting cable and power supply unit Rohde Schwarz Cologne 3544 3544 00 7 NGMO Output Connector 2 units MSTB 2 5 8 ST 5 08 Phoenix Contact RS Comp...

Page 74: ...Power Supply NGMO Bill of Materials 11 2 3 00 05 2014 ...

Page 75: ...g the Update Perform the following procedures 1 Switch on and boot the computer 2 Copy NGMO_xxx ZIP into its own directory 3 Unpack NGMO2_xxx ZIP using WINZIP or a similar program 4 Press the two DIP switches on the rear side of the Power Supply NGMO see photo left carefully down with a flat screwdriver 5 Use the 9 pole serial connecting cable to connect the serial COM interface of the computer to...

Page 76: ...The PROMPT shows among others the following message Wait erasing Flash Memory and after a short while OK Thereafter appearing dots indicate the progress of the Flash programming After a successful download the Power Supply NGMO should respond again this time by showing the version number x xx 9 After a successful DOWNLOAD close the PROMPT again as otherwise the serial interface used will remain bl...