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Siemens POLYMOBIL III Service Instructions Manual Download Page 29

Notes on trouble-shooting

4 - 17

Siemens AG

 

RXB8-115.061.02

Page 17 of 24

POLYMOBIL III

Medical Solutions

Rev. 01

10.95

CS PS 24

 

 

Checking the kV and tube current (IR)

4

•

Connect oscilloscope on D910 to MP "kV", "IR" and "GND".

•

POLYMOBIL 

ON

•

Trigger exposure with the default values 60 kV, 10 mAs.

The transient response of the tube current can be set with P1 on 
D910.

kV

IR

Prolonged transient response

kV

IR

NOTICE

Summary of Contents for POLYMOBIL III

Page 1: ...production 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 from Serial no 3000 Service Instructions ...

Page 2: ... Disclaimer The installation and service of equipment described herein is to be performed by qualified personnel who are employed by Siemens or one of its affiliates or who are otherwise authorized by Siemens or one of its affiliates to provide such services Assemblers and other persons who are not employed by or otherwise directly affiliated with or autho rized by Siemens or one of its affiliates...

Page 3: ... 1 Checking the line voltage fuses and LEDs 4 1 Checking the supply voltages 4 6 Checking the intermediate circuit voltage 4 8 Checking the maximum main inverter frequency 4 9 Oscillating current measurement 4 10 Checking the high voltage kVNOM and kVACT 4 12 Checking the filament and tube current 4 13 Setting the maximum filament frequency 4 15 Checking the tube current 4 16 Checking the kV and t...

Page 4: ...0 4 Contents POLYMOBIL III RXB8 115 061 02 Page 4 of 4 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions This page intentionally left blank Page ...

Page 5: ...the step or to indicate ways to avoid predictable problems Wiring diagram X038I Description of functions RXB8 115 041 02 Usual service tools Digital multimeter Fluke 8060 A 97 02 101 Y4290 2 channel storage oscilloscope Tektronik Type 2232 97 02 234 Y3155 mAs meter 81 60 400 RE999 Protective ground wire and leakage current tester BENDER safety tester 97 06 979 Y0526 Radiation detector See SPEED IN...

Page 6: ...lations When performing work and tests the following must be observed the product specific safety notes contained in the document the safety notes RA0 000 012 40 in Register 2 of the POLYMOBIL III file and the general safety notes contained in Register 2 of the TI binder After the system has been switched off a dc voltage of approx 300 V is applied for the main inverter On D920 the yellow LED V35 ...

Page 7: ...ength Cleaning 1 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 agents containing solvents such as gasoline used for cleaning purposes alcohol or stain remover Do not spray water on the unit For further information refer to t...

Page 8: ...POLYMOBIL III RXB8 115 061 02 Page 4 of 4 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions 1 4 Prerequisites ...

Page 9: ...tion detector to the oscilloscope and place it in the beam path of the POLYMOBIL III see Fig 1 Set the slide switch on the radiation detector to measuring range 1 1 point visible Set an SID of 40 cm and collimate onto the radiation detector with the light localizer Fig 1 Trigger check exposures using the exposure data specified in the oscillograms see Fig 2 The amplitude can be different for each ...

Page 10: ...POLYMOBIL III RXB8 115 061 02 Page 2 of 2 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions 2 2 Test with the unit in the operative condition ...

Page 11: ...mAs display on the control panel Initialization error 90 EPROM check sum error 95 IHnom circuit error 96 mAnom circuit error 97 kVnom circuit error Stand by error 03 IHact IHstby 04 IHact IHstby 05 kVact 0 06 mAact 0 09 High pressure in the tank Exposure error 11 Inverter short circuit 12 kVmax 13 Imax 14 kVact kVnom 15 mAact mAnom 16 mAact mAnom 17 maximum exposure time 18 exposure not completed ...

Page 12: ...POLYMOBIL III RXB8 115 061 02 Page 2 of 2 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions 3 2 Error messages This page intentionally left blank ...

Page 13: ...ine voltage Measure the supply voltage on site at the safety socket using the digital multimeter Plug the power plug of the POLYMOBIL into the safety socket POLYMOBIL ON POLYMOBIL OFF For voltages 240 V AC see Startup Instructions RXB8 115 034 02 chapter 3 If the POLYMOBIL cannot be switched on although the power plug and power voltage have been connected the overcurrent circuit breaker F1 may hav...

Page 14: ... on trouble shooting b Checking the fuses Checking the overcurrent circuit breaker Loosen the hand screw and the protective ground wire terminal and take the switch box off the cassette compartment Check if the overcurrent circuit breaker F1 1 Fig 1 has responded and if so unlock it Fuse value 15 A Fig 1 ...

Page 15: ...95 CS PS 24 Checking the fuses on D920 Loosen the 4 Allen screws 2 Fig 1 4 mm key size and remove the cover Check the following fuses F1 2 AT Closing circuit F2 2 AT Closing circuit F3 0 25 AT T1 secondary F5 4 AT Filament circuit F6 3 2 AT 24 V Main inverter control F7 10 AT Light beam localizerr D920 X038I 92D ...

Page 16: ... and D920 POLYMOBIL ON After the initialization the default data 60 kV and 10 mAs are displayed Stand by operation On D920 the following LEDs are illuminated With a supply voltage of 110 V LED V12 green is illuminated on D910 V40 yellow 24 V V39 yellow Vfilament V41 yellow I 0 ON OFF V35 yellow 300 V intermediate circuit voltage D920 X038I 92D NOTICE ...

Page 17: ...III Medical Solutions Rev 01 10 95 CS PS 24 Preparation ON In addition V13 green lights up on D910 Trigger an exposure In addition the following LEDs light up on D910 Error message V16 red lights up on D910 V15 green exposure V18 green SS V28 yellow radiation display D910 X038I 91E ...

Page 18: ...supply transformer T1 power supply M6 and the intermediate circuit with line voltage Measure the 24 V supply voltage with the digital multimeter on D920 at MP 24 V and 0V Measure the filament circuit voltage supply on the electrolyte capacitor C46 at on D920 Measured voltage Measured voltage approx 28 2 V Tolerance 5 V in stand by mode approx 18 5 V with preparation approx 16 4 V Tolerance 4 V Tol...

Page 19: ...5 061 02 Page 7 of 24 POLYMOBIL III Medical Solutions Rev 01 10 95 CS PS 24 Measure the supply voltages on D910 X3 5 V at X3 4 and X3 1 0 V Tolerance 0 5 V 15 V at X3 5 and X3 6 0 V Tolerance 1 V 15 V at X3 7 and X3 6 0 V Tolerance 1 V D910 X038I 91E ...

Page 20: ...0 350 V DC must be measured with the digital multimeter Charging and discharging procedure On D111 an intermediate circuit voltage of up to 350 V is applied During oscilloscope operation the protective ground wire connec tion in the power cable must not be interrupted under any circum stances For measurements where ground loops that may be present could impair the measuring result use the TEK ampl...

Page 21: ...rter frequency 4 POLYMOBIL OFF Open bridge S1 on D920 solder Connect oscilloscope on D910 to MP REG and GND POLYMOBIL ON Trigger exposure Fmax 10 kHz Tmin 100 µs Tolerance 0 µs 5 µs Adjust the maximum main inverter frequency with potentiometer P2 to D910 X028I 91E POLYMOBIL OFF Connect jumper S1 on D920 solder Err 15 is displayed No radiation NOTICE 100 ...

Page 22: ... Notes on trouble shooting Oscillating current measurement 4 POLYMOBIL OFF Connect oscilloscope on D920 to MP Is and GND POLYMOBIL ON Trigger exposure with default values 60 kV 10 mAs Main inverter ok During the kV rise After the kV rise Integrated current transformer 1V 50 A NOTICE 1 V 50 A 1 V 50 A ...

Page 23: ...Notes on trouble shooting 4 11 Siemens AG RXB8 115 061 02 Page 11 of 24 POLYMOBIL III Medical Solutions Rev 01 10 95 CS PS 24 Error case Only one diagonal is fired 1 V 50 A ...

Page 24: ... 24 Medical Solutions 4 12 Notes on trouble shooting Checking the high voltage kVNOM and kVACT 4 Connect oscilloscope on D910 to MP kVS 1 V 20 kV nominal value and kV 1 V 10 kV actual value and GND X038I 6 POLYMOBIL ON Trigger an exposure with the default values 60 kV 10 mAs ...

Page 25: ...ng the filament and tube current 4 Filament current Connect oscilloscope on D910 to MP IHS NOMINAL IH ACTUAL I ACTUAL And GND POLYMOBIL ON After approx 7 seconds the stand by filament current comes on Trigger an exposure with the default values 60 kV 10 mAs IHS IH POLYMOBIL ON Nominal Stand by filament circuit ON ON OFF value output ...

Page 26: ...POLYMOBIL III RXB8 115 061 02 Page 14 of 24 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions 4 14 Notes on trouble shooting IHS IH I I Stand by filament Exposure filament current current ...

Page 27: ...OBIL III Medical Solutions Rev 01 10 95 CS PS 24 Setting the maximum filament frequency 4 POLYMOBIL OFF Remove fuse F5 on D920 Connect oscilloscope on D910 to MP CAL and GND POLYMOBIL ON Using P3 set the maximum filament frequency on D910 100 kHz 10 µs Err 3 is displayed NOTICE ...

Page 28: ...mens AG Rev 01 10 95 CS PS 24 Medical Solutions 4 16 Notes on trouble shooting Checking the tube current 4 Connect oscilloscope on D910 to MP IRS NOMINAL IR ACTUAL and GND POLYMOBIL ON Trigger an exposure with the default values 60 kV 10 mAs IRS IR ...

Page 29: ...tions Rev 01 10 95 CS PS 24 Checking the kV and tube current IR 4 Connect oscilloscope on D910 to MP kV IR and GND POLYMOBIL ON Trigger exposure with the default values 60 kV 10 mAs The transient response of the tube current can be set with P1 on D910 kV IR Prolonged transient response kV IR NOTICE ...

Page 30: ...d of the single tank and take off the lid Fig 2 Remove jumper mA mA in the single tank Connect the mAs meter to the mA mA sockets X038I 5 5 Trigger the following exposures Remove the mAs meter and reinsert the jumper in the single tank at mA mA Reinstall the lid of the single tank Setting at control panel valid mAs values 40 kV 200 mAs 195 205 mAs 66 kV 100 mAs 97 103 mAs 90 kV 1 mAs 1 0 1 3 mAs F...

Page 31: ...D910 Establish connection jumper from plug contact X2 5 side of the board toMP P5 VR on D910 Establish connection jumper from plug contact X2 6 side of the board to MP GND on D910 Connect oscilloscope on D910 to MP F1 and GND 1 V 3 2 kHz POLYMOBIL ON Adjustment with potentiometer P7 on D910 adjust to 16 kHz Err 6 is displayed NOTICE 62 5 µs 5 V 16 kHz 1 V 3 2 kHz ...

Page 32: ...e measure set a vertical SID of 100 cm or 40 to the upper edge of the cassette Using the control buttons set a format of 18 cm x 24 cm or 8 x 10 Switch on the light localizer and align the cassette Attach radiopaque markings e g washers coins to the cassette as shown in Fig 3 Attach a washer as lateral marking Trigger an exposure 60 kV 10mAs and develop the film Using a waterproof felt pen write t...

Page 33: ...Evaluation Measure the deviations between light field edges and radiation field edges on all four sides X1 X2 Y1 Y2 as shown in Fig 4 Determine the total deviations in the X and Y direction ignore the signs Both the length deviation Σ Y and the width deviation Σ X must be less than 1 6 cm X1 Y1 Y2 X2 Film Light field Radiation field ...

Page 34: ...higher loosen the 4 Allen screws slightly arrows Fig 5 Fig 6 and move the collimator accordingly Then tighten the screws at the collimator arrows Fig 5 Fig 6 again Repeat the check and if necessary adjust the collimator again until the deviation between the light field and the radiation field is within the admissible tolerance 1 6 cm Fig 5 Fig 6 ...

Page 35: ...eadjusting the counterweight with accessories attached 4 If the support arm does not stop in any position with accessories attached readjust the spring tension for the counterweight Take the cover 3 Fig 7 off the stand Completely release the additional brake on the support arm 2 Fig 7 Move the support arm into the horizontal position Tighten the screw by means of a 17mm fork wrench 4 Fig 8 Adjust ...

Page 36: ...ator 4 Check the light beam localizer operated both at the control panel and at the collimator To do so press the button 6 Fig 10 or 7 Fig 9 the light beam localizer lamp lights up for 20 s 1s Check if the double slot diaphragm can be rotated 45 Check that format adjustment blades is easy and smooth by turning the collimator adjustment knobs 8 Fig 9 6 Fig 9 Fig 10 7 8 ...

Page 37: ...The stand cannot be moved upwards any longer Tighten the turning knob 3 Fig 1 Loosen the threaded ring and pull out the connector of the single tank Using an 8 mm Allen key loosen the two screws on the bracket 2 Fig 1 approx two turns Lift the single tank off vertically and place it on a soft base Detach the collimator see chapter 5 page 2 Install the new single tank in the reverse order Check ali...

Page 38: ...o knobs 8 Fig 4 in their final position and remove them Remove the front panel after having loosened the two screws 7 Fig 4 Caution Front panel is connected to collimator via cables 9 Fig 5 Remove the collimator after loosening the four Allen screws arrows Fig 2 Fig 3 Attach the new collimator fasten it with the four screws arrows Fig 2 Fig 3 and center it Connect the connecting cables and screw d...

Page 39: ...nd position and remove them Remove front panel after loosening both screws 7 Fig 4 Caution The frontpanel is connected to the collimator via cables 9 Fig 5 Loosen both screws 10 Fig 5 and unscrew the bracket carrier of the temperature switch Take out the defective lamp 11 Fig 5 and replace it by a new lamp Screw down the bracket and the front panel Adjust both knobs and fasten them Do not touch th...

Page 40: ... 10 95 CS PS 24 Medical Solutions 5 4 Replacing important components Check function of the light beam localizer lamp The light beam localizer lamp voltage can be adjusted at resis tance R6 12 Fig 6 The voltage at the lamp should be 11 5 V 0 2 V 12 Fig 6 NOTICE ...

Page 41: ...e Install the new caster in the reverse order Check pedal positions see operating instructions TD RX 6 Friedrich TD RX 1 Kern R TDU 3 Hay 1 Only loosen the Allen screws at the right and left key width 2 5 mm 2 Move hexagonal shaft backwards 3 Remove pedal 4 Remove allen screws key size 6 mm 5 Remove caster 6 Bring the threaded holes of the new caster into position ...

Page 42: ...POLYMOBIL III RXB8 115 061 02 Page 6 of 6 Siemens AG Rev 01 10 95 CS PS 24 Medical Solutions 5 6 Replacing important components ...

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