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Siemens MULTIMOBIL 10 Troubleshooting Manual Download Page 8

 

Service Manual

Service Instructions

 
 

Siemens Ltd. Med Division India

 

Version 4.0 

Page 7 of 48 

 

 

 

 

 

 

 

 

1.10.2 Electrical  : 

Connect oscilloscope at D915.TP.kV. 
Set the exposure parameters as 60kV 16mAs. 
Release an exposure. 
The recorded waveform will read 2.9V - 3.1V. 
Repeat with 100kV 10mAs. 
The recorded waveform will read 5V +/-0.25V. 
 
Lower kV indicates code in kVsoll / kV sensing / kV-regulator OR high mA. 
Higher kV indicates code in kVsoll / kV sensing / kV regulator. 

1.11  mA/mAs Measurement : 

mAs measurement could be carried out either by mAs-meter or by electrical 
measurement. 

 

1.11.1 mAs-meter  : 

Remove mAs link on D800 PCB on the Single tank. 
Insert mAs-meter leads in the banana sockets mA+ and mA- on D800. 
Set meter at, 200mAs and in the mAs mode. 
Set exposure parameters as 60kV 32mAs. 
Release an exposure. 
The meter will read 31 – 33 mAs. 
Repeat for exposure parameters 100kV 40mAs. 
The meter will read 39 to 41mAs. 
 

1.11.2 Electrical  : 

Connect oscilloscope at D915.TP.JR. 
Set exposure parameters 60kV 16mAs. 
Release an exposure. 
The recorded waveform will read 3 – 3. 2V. 
The exposure time will be 95 - 105mS. 

 

Lower mA indicates code in mAsoll / mA sensing / mA regulator circuit. 
Higher mA indicates code in mAsoll / mA sensing / mA regulator or Low kV. 
Incorrect mAs indicate code in timer circuitry. 

1.12 Calibration 

: 

It is advisable to re-calibrate the unit in case of undershoot or overshoot observed in 
the mA wave shape. 
Recalibration is required when the single tank is replaced. 

Summary of Contents for MULTIMOBIL 10

Page 1: ...ens AG 2003 The reproduction transmission or use of this document or its contents is not permitted without express written authority Offenders will be liable for damages All rights including rights created by patent grant or registration of a utility model _or_ design _are_ reserved SP Troubleshooting Guide ...

Page 2: ...ed Division India Version 4 0 Page 1 of 48 Multimobil 10 Med Service Instructions Version 4 0 The reproduction transmission or use of this document or its contents is not permitted without express written authority Offenders will be liable for damages ...

Page 3: ...Y CHECKS 10 1 21 1 Daily checks 10 1 21 2 Monthly checks 10 1 21 3 Performance Check Every Six months 10 1 22 PROGRAM MODES FOR SERVICING 11 1 22 1 Program 1 To display the DC voltage on the capacitor 11 1 22 2 Program 2 To check the total number of exposures taken 11 1 22 3 Program 3 To check the type of codes that occurred in the unit maximum 20 11 1 22 4 Program 4 To Erase the errors that have ...

Page 4: ...TIONS 23 3 17 REPLACING THE SINGLE TANK 23 3 18 REPLACING THE COLLIMATOR 24 3 19 REPLACING THE COLLIMATOR LAMP 24 4 SPECIFIC CODE HANDLING 25 4 1 UNIT NOT SWITCHING ON 25 4 2 NO RADIOGRAPHY 27 4 3 NO STANDBY 29 4 4 INITIALISATION CODES 30 4 4 1 Code 90 EPROM CHECKSUM FAILURE 30 4 4 2 Code 96 KV SOLL FAILURE 30 4 4 3 Code 97 mA FAILURE 30 4 5 STANDBY CODES 31 4 5 1 Code 02 15 V Supply Code 31 4 5 2...

Page 5: ... the protective ground wire connection in the power cable must not be interrupted under any circumstances For measurements where ground loops that may be present could impair the measuring result use the Tek amplifier and the trigger attachment 1 3 Measuring with oscilloscope For normal working the protective earthing of mains must not be removed In case system noise is getting coupled to the scop...

Page 6: ...AL during start up 15KHz 0 5 kHz D915 P3 The actual mains Line voltage at 110 and 230 V supply is being monitored for display on the 7 segment display during first step of hand release switch for radiography Ensure that display value mathes with actual line voltage with allowed tolerance 5 Using P1 potetiometer on D801 PCB set the voltage accordingly This is applicalbe while replacing D915 and D80...

Page 7: ...code is displayed on the seven segment display Sharps knocking sound from inverter indicates inverter short circuit resulting in code display on the top panel 1 9 Timing Set 60 kV 16mAs Release an exposure The radiation indication LED will light for 100msec 5msec 1 10 KVp KVn KV Measurement The kVp KVn KV measurement can be carried out either by kVp meter or by electrical measurement 1 10 1kVp met...

Page 8: ...nk Insert mAs meter leads in the banana sockets mA and mA on D800 Set meter at 200mAs and in the mAs mode Set exposure parameters as 60kV 32mAs Release an exposure The meter will read 31 33 mAs Repeat for exposure parameters 100kV 40mAs The meter will read 39 to 41mAs 1 11 2Electrical Connect oscilloscope at D915 TP JR Set exposure parameters 60kV 16mAs Release an exposure The recorded waveform wi...

Page 9: ...or missing screws should only be replaced by steel screws having the specified tensile strength with Nickel Plating 6492 specified in the Surface Finish Documents 1 16 Cleaning The unit must always be switched OFF or disconnected before cleaning Use only water or a Luke warm mixture of a household cleaner diluted with water to clean the unit Do not use an abrasive or organic solvents or cleaning a...

Page 10: ...age to electrical components formation off flammable mixtures of air and the solution vapor 1 19 Maintenance All parts modules of this product must be tested inspected for performance and safety aspects every 12 months to ensure that the product functions properly and is safe for patients operating personnel and other persons Every 12 months trained technical personnel should inspect and if necess...

Page 11: ...he exposure indicator and audible signal during exposure Check that the Single tank assembly and the arm system remain in the desired position 1 21 2Monthly checks Check the lifting and lowering movements of the support arm Check function of locking lever and cap screw on the X ray tube Check the legibility of the labels according to those in section Location of Labels If any labels require to be ...

Page 12: ...ce mode and the display will read as below Pr 1 Press the switch DL serv on the D936 once The display will read as below Cap XXX XXX corresponds to the DC voltage on the capacitors 1 22 2 Program 2 To check the total number of exposures taken Select the program two in service mode and the display will read as below Pr 2 Press the DL serv switch and enter into the program The display will be XXX XX...

Page 13: ... service mode and the display will read as below Pr 5 Press the switch DL serv on the D936 once The display will read as below las Val The default value can be set by selecting the desired kV mAs combination Last selected combination can be stored by pressing the DL serv switch twice 1 22 6Program 6 To set the maximum kV and mAs value for the unit Select the program six in service mode and the dis...

Page 14: ...ctions Siemens Ltd Med Division India Version 4 0 Page 13 of 48 Press the Radiographic exposure switch and monitor REG on Digital storage Oscilloscope The display indicates F On Adjust REG for 15 kHz 0 5kHz by using P4 on D915 card ...

Page 15: ... Zero kVist ratio 1 V 20kV 06 JR 0 JR is read by the µC through Analog port 1 During Standby the value of JR read should be Zero JR ratio 1 V 50mA 33 Main Inverter Short Circuit If the Main Inverter Driver Cable is disconnected this Code gets activated Also if IGBT Drivers on D960 Card detects Short Circuit of IGBT s this Code gets activated 34 Filament Inverter Short Circuit This Code gets activa...

Page 16: ... JRS JR is continuously polled during exposure The value of JR should be greater than 50 of JRS 17 Backup Timer If regular means of terminating exposure fails and exposure gets terminated by the backup timer 18 Premature Exposure Termination Exposure Release Switch is released before the exposure is terminated by the mAs Integrator 21 I Iheiz Same as Code 04 but during Exposure 22 Maximum Preparat...

Page 17: ...nt cover and X ray source assembly 3 1 1 Removing the top panel Turn off the Multimobil 10 disconnect the mains chord and wind the cord around the cable holder Lower the X ray source assembly to transport position Lock the Multimobil 10 by applying the brake Unscrew the two ornamental screws see location in figure with 2 5 mm allen key Grasp the top panel and lift it as shown in figure ...

Page 18: ...ray source assembly is properly secured with the transport safety lock It should not be possible to move the X ray source assembly upwards This is very important for safety reasons Turn off the Multimobil 10 disconnect the mains chord and wind the cord around the cable holder Lower the X ray source assembly to transport position Lock the Multimobil 10 by applying the brake Arrange some kind of sof...

Page 19: ...the line voltage fuses and LEDs 3 2 1 Checking the line voltage Measure the supply voltage at site using the digital Multimeter Ensure that the supply conditions Voltage Frequency are within limits as specified in the Technical Specifications for the Unit Switch the Unit ON Note If the Unit cannot be switched ON Check Supply at Mains socket Check Continuity of mains cable with the Plug pins Check ...

Page 20: ...upply for Control ckt F5 10AT Collimator supply F6 0 8 AT DC DC Conv ckt F7 1 6AT 220V AC supply for contactors Standby mode On D801 the following LED s are illuminated V30 Supply for SMPS V31 Supply for Filament Inverter V32 Supply for Rotating Anode ckt V35 12V AC Supply for Collimator V36 VP supply V50 24V DC on D801 V23 V24 DC supply for filament inverter 3 3 Checking the Control Voltages In t...

Page 21: ... display indicates AdJ F Press the Radiographic Exposure switch and monitor REG on the oscilloscope The display indicates F On No Radiation F max 15 0 5 kHz Adjust the maximum main inverter frequency with potentiometer P4 on D915 Turn the Unit OFF Remove ST link 3 6 Filament current measurement Turn the Unit OFF Connect oscilloscope to D915 TP IH Turn the Unit ON After approx 3 seconds the Stand b...

Page 22: ...fixed Connect X11 on D915 3 9 Checking the tube current Connect oscilloscope to D915 TP JRS D915 TP JR Turn the unit ON Trigger an exposure with the default values Observe the voltage on CRO 1V 50mA confirm value for selected kV mAs 3 10 Checking the kV and tube current JR Connect oscilloscope to D915 TP KV D915 TP JR Turn the unit ON Trigger an exposure with the default values Observe the voltage...

Page 23: ...es within a short period overload protection will automatically switch the light OFF Cool down periods are recommended 3 14 Aligning the light field to the radiation field 3 14 1Operating sequence Load a 24 Cm x 30 cm or 10 x12 cassette with film and place it on a table or a similar base Using a tape measure set a vertical SID of 100cm or 40 to the upper edge of the cassette Using slide flaps set ...

Page 24: ... easy to lift the arm UP or pull it down When the single tank does not remain at the required position the spring tension should be adjusted for complete balancing If the Single tank moves DOWN from the required position the spring tension is to be increased If it moves UP then the spring tension is to be reduced 3 16 Adjustment Instructions Carry out the change in the pre tension of the spring te...

Page 25: ...nd adjust if necessary The parameter adjustments and the calibration of the Unit is Specific to the Single Tank In case if the Single Tank is replaced it is necessary to recalibrate the equipment 3 18 Replacing the collimator In case of any damage to collimator housing the collimator has to be replaced completely Proceed as described in the following Loosen the allied connector on the collimator c...

Page 26: ...NS SWITCH ON PRESS SWITCH I ON THE TOP PANEL UNIT ON IF ON OFF SWITCH IS Found faulty THEN REPLACE D936 ELSE REPLACE D801 yes No Yes No LED V50 ON on D801 Yes No CHECK MAINS SUPPLY Yes B Relay K5 and then K4 on D801 ON No Yes Contactors NS CS operates Check 220V on D801X50 1 X50 3 Ensure relays K4 CS1 are operating No Yes B Are Transformer O P Check Voltages on D801 between terminals X1 6 X1 7 sho...

Page 27: ...Service Manual Service Instructions Siemens Ltd Med Division India Version 4 0 Page 26 of 48 Measure voltages at X1 1 and X1 4 of D801 should be 230v Stop B A ...

Page 28: ...raphy START UNIT IN STANDBY STATE GO TO INITIALISATION ERRORS PAGE 25 PRESS RADIOGRAPHIC FIRST STEP PRESS RADIOGRAPHIC SECOND STEP FILAMENT BOOSTING RADIAGRAPHIC EXPOSURE INITIATED EXPOSURE ERROR No Yes Yes Yes No NO Yes B NO GO TO EXPOSURE ERRORS PAGE 31 A GO TO INITIALISATION ERRORS GO TO EXPOSURE ERRORS ...

Page 29: ...Service Instructions Siemens Ltd Med Division India Version 4 0 Page 28 of 48 Contd B HK SIGNAL ON J36 15 ON D915 OK 15V SUPPLY TO RADIOGRAPHIC SWITCH REPLACE RADIOGRAPHIC RELEASE SWITCH REPLACE D915 PCB STOP Yes No A ...

Page 30: ...HE TOP PANEL UNIT ON GO TO UNIT NOT SWITCHING ON PAGE 20 WAIT FOR 3 SEC CS contactor picks up ANY ERROR DISPLAYS STABLE KV mAS GO TO STANDBY ERRORS PAGE 26 GO TO INITIALISATION ERRORS PAGE 25 CONFIRM STANDBY PARAMETERS STOP Yes No Yes No No Yes Yes No REPLACE D915 AND CALIBRATE THE UINT GO TO UNIT NOT SWITCHING ON GO TO INITIALISATION ERRORS GO TO STANDBY ERRORS ...

Page 31: ...ion codes 4 4 1 Code 90 EPROM CHECKSUM FAILURE REPLACE J32 FIRMWARE 4 4 2 Code 96 KV SOLL FAILURE ADJUST PRESET P7 ON D915 4 4 3 Code 97 mA FAILURE ADJUST PRESET P6 ON D915 START CONFIRM 230v SUPPLY SWITCH ON THE UNIT ERROR CONTINUES REPLACE D915 PCB STOP No YES IS X15 CONNECTOR SUPPLY OK REPLACE D980 NO Yes ...

Page 32: ...India Version 4 0 Page 31 of 48 4 5 Standby Codes 4 5 1 Code 02 15 V Supply Code START REMOVE CONNECOR X15 ON D915 SWITCH ON THE UNIT MEASURE 15 V ON X15 CONNECTOR VOLTAGE 13 5 TO 16 5 V YES REPLACE D915 PCB NO ADJUST BY PRESET ON D980 ELSE REPLACE D980 PCB STOP ...

Page 33: ...eiz Istby Iheiz Istby START REMOVE X11 CONNECTOR ON D915 SWITCH ON THE UNIT MONITOR CAL FREQUENCY OBSERVE CAL FOR 15KHz TUNE BY P3 SWITCH OFF THE UNIT MONITOR I RMS ON D915 I RMS 0 6V 0 1 Yes REPLACE D915 PCB STOP No ADJUST BY PRESET P5 Is Filament ON No Fil pulses at J22 15 J22 16 of D915 Yes No Yes Replace D801 ...

Page 34: ... Version 4 0 Page 33 of 48 4 5 3 Code 05 kVist 0 START KVIST 0 NO SPIKES MAKE THEIR PROPER CONNECTION X8 X1 ON D915 D800 ARE CONNECTED PROPERLY SWITCH OFF THE UNIT R 20 Kohms AT X8 1 X8 2 X8 3 REPLACE D800 PCB ON THE SINGLE TANK Yes REPLACE D915 STOP No Yes No YES NO ...

Page 35: ...de 06 JR 0 START MONITOR JR SWITCH ON THE UNIT IS JR 0 NO SPIKES REPLACE D915 ENSURE ALL CONNECTORS ARE CONNECTED YES STOP R 20 OHM AT X8 5 X8 6 REPLACE D800 IF THE ERROR CONTINUES REPLACE SINGLE TANK AND CALIBRATE THE UNIT CHECK X8 CONNECTOR ON D915 No SWITCH OFF THE UNIT No Yes Yes REPLACE D915 STOP ...

Page 36: ...8 4 5 5 Code 33 Main Inverter Short Circuit START ENSURE CONNECTIONS OF X20 CONNECTORS ON D960 AND D915 STOP MONITOR VP 15V ON D801 AND REPLACE D801 IF FOUND FAULTY REPLACE D915 ERR SIGNAL OBTAINED FROM D960 IN STBY MODE Yes CHECK IGBTs AND REPLACE IF FOUND SHORTED ELSE REPLACE IGBT MODULE No ...

Page 37: ... 0 Page 36 of 48 4 6 EXPOSURE CODES 4 6 1 Code 11 Main Inverter Short Circuit START MONITOR SCM SIGNAL AND SWITCH ON THE UNIT No STOP SWITCH OFF WAIT FOR 5 SEC IGBTS SHORTED Yes ENSURE J34 IC ON D915 IS WORKING IC FAULT REPLACE IGBTs ELSE REPLACE IGBT MODULE REPLACE D915 YES No ...

Page 38: ...NUES No Yes SWITCH OFF THE UNIT AND SHORT THE ST LINK ON D915 PCB SWITCH ON THE UNIT SELECT THE Pr 7 BY PRESSING KV PRESS DL_SERV KEY AND THEN EXPOSURE RELEASE SWITCH MONITOR REG AND SET THE FREQUENCY TO 15KHz BY VARYING POT P4 STOP YES SWITCH OFF THE UNIT NO IS 20K AT PIN X8 1 X8 2 W R T X8 3 ON D915 PCB REPLACE D915 REPLACE D800 PCB ON SINGLE TANK ERROR CONTINUES REPLACE SINGLE TANK Yes No Yes N...

Page 39: ...de 13 Iheiz Imax OR JR Jrmax START MONITOR IH AND JR ON D915 PCB IS IH MAX ERROR DECREASE BY VARYING POT P5 AND P6 ERROR CONTINUES TAKE AN EXPOSURE MONITOR I FOR PULSES REPLACE D801 PCB REDUCE OVERSHOOTS IN JR BY PRESET P5 ELSE REPLACE D915 NO YES REPLACE D915 PCB YES STOP IS JR JRmax YES NO No YES NO ...

Page 40: ... PULSES SWITCH OFF THE UNIT CONFIRM NO WIRE HAS COME OUT IN INVERTER MODULE CONFIRM REG 15 0 2 KHZ NO REPLACE D915 PCB YES U V CURRENT W F OK REPLACE IGBT MODULE IS 20K AT X8 1 X8 2 w r t X8 3 REPLACE D800 PCB ON SINGLE TANK SWITCH ON THE UNIT REPLACE SINGLE TANK NO STOP CAP BANK ON D970A IS CHARGED Yes YES CHECK THE O P DC VOLTAGE OF D950A A A NO No Yes REPLACE THE CHARGER MODULE Yes REPLACE THE ...

Page 41: ...INK ON D800 PCB SWITCH OFF THE UNIT CHECK I FOR 0 6V 0 1V AC RMS Check for 22 3 Ohms between X8 5 and X8 6 and replace D800 if found faulty KV build up OK No Check Inverter ckt Inverter pulses Resonance cap C5 Yes Voltage betw X8 5 and X8 6 is OK No Check and replace D800 if found fauly Check and replace D915 if found faulty Yes STOP ...

Page 42: ...Exposure terminated by Backup Timer START MONITOR JR ON D915 mAS ON D800 PCBS ARE PULSES MULTIPLY JR PULSE DURATION OF J1 9 IS IT EQUAL TO mAS ADJUST FREQUENCY AT J1 9 BY VARYING P1 TAKE AN EXPOSURE AND NOTE THE TIME TIME EXCEEDS EXPOSURE TIME REPLACE D915 PCB STOP YES Yes NO ERROR CONTINUES NO Yes NO Yes No ...

Page 43: ...tructions Siemens Ltd Med Division India Version 4 0 Page 42 of 48 4 6 7 Code 18 Premature termination of Exposure START PRESS KV mAs KEY ERROR IS REMOVED PRESS AND HOLD EXPOSURE RELEASE SWITCH TILL EXPOSURE GETS TERMINATED STOP ...

Page 44: ...Ltd Med Division India Version 4 0 Page 43 of 48 4 6 8 Code 21 Iheiz Iheiz maximum START MONITOR IH ON D915 PCB DECREASE BY VARYING POT P5 AND P6 ERROR CONTINUES TAKE AN EXPOSURE IS THERE ANY SPIKE NO REPLACE D915 PCB YES STOP No REPLACE D801 YES ...

Page 45: ...ons Siemens Ltd Med Division India Version 4 0 Page 44 of 48 4 6 9 Code 22 Maximum Preparation Time START ALLOW 2 TO 10 SEC TIME IN BETWEEN FIRST SECOND STEP OF RADIOGRAPHY TAKE AN EXPOSURE ERROR CONTINUES REPLACE D915 PCB STOP Yes NO ...

Page 46: ...EC TIME IN BETWEEN FIRST SECOND STEP OF RADIOGRAPHY Is anode in the SingleTank rotating No Yes Is ARR signal obtained on D915 No Replace D915 Yes Check feedback voltages on test points I1 and I2 220V AC supply to Rot Anode ckt OK No Yes Check fuse F3 on D801 and replace if found faulty If relay K2 on D801 doesn t operate replace K2 Replace D801 stop ...

Page 47: ...use S No Check for 230v across x3 2 and x3 6 on D950A 1 Check for the continuity of the wires If found faulty Replace with OK wires 2 If found OK Confirm if CS operates If not Replace CS contactor Yes No S Check V24 on D950A glows Yes Check Vc test point on D950A Should be 3 3 Vdc Yes Check Fr1 test point on D950A Should be 25 KHz frequency Replace D950A NO NO Yes NO A ...

Page 48: ...anual Service Instructions Siemens Ltd Med Division India Version 4 0 Page 47 of 48 Contd Check Vc on D915 Should be 3 3V Check if X20 cable is OK If found faulty replace the cable No Yes Replace D915 Stop A S S ...

Page 49: ...mens Ltd Med Division India Version 4 0 Page 48 of 48 4 6 12 Code 01 Err signal on D950A active Start Is tp test point on D950A low Replace D950A NO Is Vc 3 35v A test point on D950A Yes Yes NO Whether IGBT V3 is Short circuited Stop NO YES ...

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