Siemens MOBILETT Plus HP Service Instructions Manual Download Page 51

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HT and single tank error diagnosis

6 - 5

Siemens AG

SPR8-220.061.03

Page 5 of 12

MOBILETT Plus HP

Medical Solutions

Rev. 03

09.03

CS PS 24

Exposure values: 40 kV 5 mAs, HT 8 kV/div (200 mV/div),
I

inverter-single tank

100 A/div (only the end of the exposure is shown)

Fig. 2

HT and inverter current, inverter and single tank normal

Inverter
current

HT on
D1

Summary of Contents for MOBILETT Plus HP

Page 1: ...002 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 From Serial No 30900 SP Service Instructions ...

Page 2: ...ls 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 affiliat...

Page 3: ..._________________________________________ 5 1 Entering service mode 5 1 Selecting test programs with the kV buttons 5 1 Error messages in service mode 5 1 List of test programs available in service mode 5 2 P01 Filament test 5 2 P02 Rotation test 5 2 P03 Capacitor bank and charging test 5 3 P04 Display LED and buzzer test 5 4 P06 Capacitor formation 5 4 P07 Query filament values from the battery b...

Page 4: ...ht field relative to the X ray field 9 3 Replacing the collimator 9 4 Checking the light intensity 9 7 Light field relative to the X ray field 9 8 10 _____ Mechanical systems ___________________________________________10 1 Adjusting the arm system 10 1 Parallelism 10 1 Counterbalance 10 3 Adjusting the friction linings 10 4 Replacing the spring pack 10 7 Adjustment and replacement of the turn plat...

Page 5: ...unit 11 6 Exchange of motor power unit D102 11 6 Replacement of fuse 4 A 11 7 12 ______DAP measuring system option _________________________________ 12 1 Recalibration of DAP measuring system 12 1 Required equipment 12 1 Recalibration procedure 12 1 Miscellaneous service issues 12 3 13 ______Changes to previous version ____________________________________ 13 1 Page ...

Page 6: ...0 6 Contents MOBILETT Plus HP SPR8 220 061 03 Page 6 of 6 Siemens AG Rev 03 09 03 CS PS 24 Medical Solutions This page intentionally left blank ...

Page 7: ...symbol indicates components that are sensitive to electrostatic discharge ESD DANGER indicates an immediate danger that is likely to result in death or serious physical injury WARNING indicates a risk of danger that may lead to death or to serious physical injury CAUTION used in conjunction with the safety alert symbol indi cates a risk of danger that is likely to result in slight or moderate phys...

Page 8: ...t Rope Pulley block Lubricants 1 All purpose grease PD 2 Viscogen oil Wiring diagram SPR8 220 051 Functional description SPR8 220 041 All tools measurement and auxiliary devices with the exception of those marked are listed along with their specifications in the STC Service Tools Catalog Adjustment device for belt tension Part No 65 64 301 Current transformer 50 A 50 mA In addition a metal film re...

Page 9: ... general safety information contained in ARTD Part 2 Connect the MOBILETT Plus HP only to a mains power supply outlet receptacle that corresponds to the installation requirements of VDE 0107 or to country specific regulations Remove or install boards only when the generator is switched OFF Adhere to the ESD guidelines Checks and adjustments performed with radiation ON are identified by the radiati...

Page 10: ...e cassette compartment Fig 1 Fig 2 Comply with the information given in this section before opening the system High Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system i...

Page 11: ...asurement device Connect the measurement device to CAPPOS and CAPNEG Switch S10 off Connect the mains cable and switch the system ON Check whether the voltage increases Switch the system OFF disconnect the mains cable and switch S10 on Check whether the voltage decreases Fig 3 Fig 4 If the voltage measured between CAPPOS and CAPNEG is 0 V the measurement device could be defective or the wires betw...

Page 12: ...ischarged as stated below If the charging discharging does not function the power conver sion unit M10 and M11 must be considered charged This means a risk of high voltage Use caution when performing measurements at the capacitors in M10 and M11 Use only the specified measurement devices 350 V DC WARNUNG WARNING 1 1 2 2 3 3 4 4 1 2 3 4 Left connector on D7 to the connector of the digital multimete...

Page 13: ...ck the filament heating value for the selected kV see section P07 Read out filament values from battery backed RAM Compare the value with the value in the delivery protocol If the difference is large make a new adaptation see section P10 Fast adaptation Err 3 in combination with Err 21 Err 22 Check the measuring point FIL_VAL on D1 see page 160 and page 110 CAL 13 Check the 60 V supply voltage on ...

Page 14: ... page 141 For a large deviation Check the filament value see section P07 Read out filament values from battery backed RAM and compare it with the values in the delivery protocol If the difference is large a new adaptation is needed see section P10 Fast adaptation See also section Error diagnosis HT and single tank Check the connection K9 between D1 and H1 single tank and the connection between D1 ...

Page 15: ... generator a defective connection may be the cause Check the connections K64 1 and K64 2 on D13 and the K64 connection to the single tank see page 140 Check cables K9 and K8 see page 140 Check main fuse U101 see page 140 Check the trigger pulses INV A and INV B to the inverter page 140 Check the capacitance in the capacitor bank see section P03 Capacitor bank and charging test Check the current to...

Page 16: ...emove K64 page 140 during the next test Activate the radiation release switch to the first level preparation and listen for the anode to start up see page 150 Check that the following supply voltages are present on D4 100 V 15 V 5 V DC see page 150 Check that the trigger pulses are present at ROT when the anode is accelerated see page 150 Check that the measuring signals ROT_VAL on D4 and ROT on D...

Page 17: ... the single tank see section Error diagnosis HT and single tank Err 9 During exposure When measuring the kV value a large high tension asym metry is detected Normally the kV value is symmetric around ground The acceptable devi ation is 19 5 kV This corresponds to HTD 2 5 V 0 5 V Intermittent measurement cables or defective single tank Check the measurement cable K9 between D1 and the single tank s...

Page 18: ...the measurement circuit for the temperature see page 140 contact K9 CAL 12 During preparation Stored filament value is lost Check the voltage in the backup battery see page 110 The battery should have a voltage 2 8 V Check that the battery jumper is securely attached see page 110 Make a new adaptation see section P10 Fast adaptation CAL 13 Generator ON The voltage supply 60 V DC to the fila ment c...

Page 19: ...ransistor in the buck converter is short circuited the current will flow until fuse U8 on D8 blows Replace the D7 charging unit USE 15 During preparation The exposure switch has been in prepara tion position for longer than 20 s max preparation time is 10 s if FW version lower than V0 1H The user has kept the exposure release switch in preparation position for longer than 20 s after the Ready indi...

Page 20: ...idual voltage in the modules may have been too high when they were connected to each other This may have caused the fuse to blow see page 125 Err 17 Generator ON The capacitors are charging too slowly 1 4 V s Check that S10 on D7 is switched off If the error occurs after working on the capacitor bank check the cabling and the connections to the capacitor bank see page 125 Check fuse U8 on D8 and f...

Page 21: ...lamp glows The leakage current in the capacitor bank is too large The measurement is performed dur ing charging at 150 V DC Charging is interrupted for 5 s If the voltage drops by more than 1 6 V a message will be displayed See also Err 17 In cases where the generator has not been operated for several months the leakage current in the capacitors will have increased Use the formation program P06 se...

Page 22: ...d the connec tions k11 and k1 see page 140 Err 21 Generator ON The measured value of the standby fila ment current has exceeded the limit FIL_VAL on D1 must be between 0 16 and 2 5 V when the filament is in standby mode Check the supply voltages on D4 60 V 15 V and 5 V see page 160 Check the pulses at measurement point FIL on D4 see page 160 Check the value in FIL_VAL on D1 see page 160 Check the ...

Page 23: ...V 15 V and 5 V see page 160 Check the connection between D4 and the filament transformer K60 see page 160 Check the trigger pulses in measurement point FIL on D4 see page 160 Check the value in FIL_VAL on D1 The value must be stable in the standby filament After change over to preparation the value should stabilize again See also P01 Filament test Dis played messages Mode of operation Cause Possib...

Page 24: ...ections Error diagnosis HT and single tank P12 Inverter and single tank test and P13 Inverter test The X ray tube may have arced during the exposure Tube arcs can occur if the first exposure after a long interval is an exposure with high kV values The unit has to be started with several exposures at high mAs values The kV values selected should be increased from 40 kV to 133 kV See also section Er...

Page 25: ...up battery with battery jumper are okay replace D1 see pages 110 and 140 USE 25 Generator ON The calculated load of the anode target has been lost The value is lost from CMOS mem ory See also CAL 31 Check all supply voltages on D1 see page 110 Check that the battery jumper is properly mounted and that the vol tage in the backup battery is 2 8 V see page 110 A tube arcing has caused a tempo rary di...

Page 26: ...message CAL 26 occurs repeatedly or if the message can not be acknowledged by pressing kV or by switching the unit OFF and ON replace D1 CAL 27 Generator ON during startup Error in ROM mem ory Check sum is incorrect Check that all supply voltages on D1 are present see page 110 The ROM containing the program is defective Replace the software IC s I72 I66 and I74 on D1 see page 110 If the error reoc...

Page 27: ...1 Enter the cause and the error message CAL 28 in the service protocol CAL 29 Generator ON The single tank has been connected incorrectly The single tank is missing or the cable harness has been incorrectly connected Check that connection K9 on D1 is connected Check for possible damage in the main cable harness between D1 and the single tank Measure K9 13 4 and move the arm and single tank while t...

Page 28: ...hich has disturbed the system If the USE 30 message occurs repeatedly the single tank must be checked according to Error diagnosis HT and single tank If the function of the single tank is OK and USE 30 occurs repeatedly replace D1 If necessary reinstall the customer kV and mAs limit values see sec tions P14 Number of kV steps and upper kV limit and P15 Upper mAs limit CAL 31 Generator ON The volta...

Page 29: ...he mes sage is not displayed to the operator Generator ON Temporary signal fault during program execution Err 33 messages can be ignored This message can only be read out from the message history P08 The message is only used as an aid for software development Acknowledge and clear the mes sage history Err 34 Generator ON The number of mes sages is beyond the maximum limit Messages are being lost a...

Page 30: ...s mes sage can only be read out from the message history P08 Generator ON The inverter was interrupted once e g by overcurrent If the inverter has been stopped more than 3 times the exposure will be interrupted and the Err 23 mes sage is shown on the display Check the inverter current see sections Error diagnosis HT and single tank and P13 Inverter test The X ray tube may have arced during the exp...

Page 31: ...nction of the single tank is OK and USE 37 occurs repeatedly replace D1 Err 38 The mes sage is not displayed to the operator This mes sage can only be read out from the message history P08 Generator ON The error statistics are lost See Err 37 If Err 38 is the only message in the history memory it will not be necessary to replace D1 These statistics are only used in the factory USE 39 Generator ON ...

Page 32: ...w kVactual value results in decreased heating value negative correction 2 Change in generator output This may occur when exchanging the inverter or the single tank In each case the heating values must be readjusted and recorded see P10 and P07 in the service program a b If the generator output is increased this results in an increase in heating value If the generator output decreases the heating v...

Page 33: ...t Err 17 Capacitor bank charging too slow Err 18 Capacitor voltage charging too slowly CAL 19 Leakage current too high in the capacitor USE 20 Radiation release button was released during the exposure Err 21 Filament current incorrect for standby Err 22 Filament current incorrect for exposure Err 23 During exposure the main inverter was interrupted 3 times USE 24 The selected kV and mAs values are...

Page 34: ...iemens AG Rev 03 09 03 CS PS 24 Medical Solutions 2 22 Display messages List of messages in the error memory Err 33 Signal fault during program execution Err 36 Overcurrent in HT inverter Err 37 Error memory contents lost Err 38 Error statistics lost ...

Page 35: ...ctions Charge batteries MOBILETT Plus HP Plug in mains cable Main switch C Display illuminated Plug out mains cable Main switch B kV and mAs buttons OK Collimator lamp can be turned ON OFF Turn plate can be activated deactivated Green Ready light indicator is ON Voltage supply Program run see section P04 Display LED and buzzer test Connections Button function Defective lamp Cables Fuse Lamp button...

Page 36: ...igh voltage Exposure Exposure interrupted Correct density MOBILETT Plus HP OK Yes Yes Yes Yes No Yes Exposure release switch cables and connections Err 6 see P02 Rotation test Remote control option Exposure release switch cables and connections Displayed message Remote control option kV mAs selection Exposure time Heating value Darkroom No USE 39 Err 6 Err 6 No No No Displayed message No Displayed...

Page 37: ...en for a click from LR1 see wiring diagram page 180 If no click is heard check the voltage supply on D4 Check the measuring point LAMPON If there is no signal check k5 k9 k3 and k2 If a click is heard check the voltage supply in the lamp bracket see wiring diagram page 180 D Press the turn plate button and check if a click is heard from MR1 and MR2 see wiring diagram page 170 If a click is heard c...

Page 38: ...MOBILETT Plus HP SPR8 220 061 03 Page 2 of 2 Siemens AG Rev 03 09 03 CS PS 24 Medical Solutions 4 2 Troubleshooting instructions This page intentionally left blank ...

Page 39: ...is displayed pressing the kV button will show the program version again and so on Pressing the kV button will display the previous test program The lamp button has a toggling function and is used both to start and stop the displayed test program For exam ple after the lamp button has been pressed the formation of the capacitor bank starts and the following is shown on the display The test program ...

Page 40: ...am page 150 Accelerate the anode with a 160 Hz frequency during two seconds After this first acceler ation the speed is measured and if necessary a second acceleration of two seconds occurs When the correct speed is reached the anode will rotate freely for 20 seconds or until the rotation frequency is below 142 Hz before it is braked during 9 seconds to a stop An error message will be displayed af...

Page 41: ...itor will first be charged to 350 V then discharged to 229 V The voltage will be held for 5 seconds before it is restored to 350 V During the test the voltage in the capacitor bank is indicated except when the capacitance is displayed If an error is detected the test program will be aborted A beep will be audible and a mes sage will be displayed If the test ends successfully the display will show ...

Page 42: ...s or if several capacitors have been replaced The capacitors are slowly charged up to 353 V in a con trolled sequence The test program starts by displaying After a short time the program displays the actual voltage in the capacitor bank The voltage value is increased approximately every six minutes The charging sequence increases as follows 150 250 299 325 337 345 348 351 353 V At the 353 V level ...

Page 43: ...values are self adjusted to produce a kV value with minimum devi ation If the software has been optimized a filament value for a specific kV value will have been indicated with the letter A in the extreme right position on the mAs display P08 Display the message history 5 The history contains two parts The first is the appearance number and the second the actual message The appearance number will ...

Page 44: ...s the exposure button every time the ready light indicator lights The program starts at a low kV value and when the actual value is stable it increases to the next kV value automatically Example During the adaptation some messages may appear Most of these can be ignored since the generator has incorrect filament values However check every message against the message list and confirm them by pressi...

Page 45: ...t When the first part is finished the second starts automatically The first part selecting the number of steps In this program it is possible to choose between a fixed number of 25 or 49 steps The number of steps corresponds to Siemens point scale with integer points or half integer The factory setting is 25 steps To change or check the valid setting activate the program with the lamp button The d...

Page 46: ...the lamp button The display shows the selected mAs limit change with mAs or mAs buttons Example Press the lamp button to store the currently displayed values and to exit P15 P16 Show the exposure counter 5 This program is activated by the lamp button and shows the actual number of exposures Example 1 Example 2 Exit the program by pressing the lamp button Always check that the values selected corre...

Page 47: ...OS on D1 Check the inverter current with an external current transformer Measure HTPOS and HTNEG on D1 Record the fall times 90 10 of HT high voltage levels and whether the exposure was interrupted prematurely Compare with Fig 2 HT and inverter current inverter and single tank normal Measure the inverter current using an external current transformer and the HT Compare with Fig 1 HTPEAK and inverte...

Page 48: ...5 Mohm If the value is less than 100 ohms the inverter is defective transistors in the modules are defective The inverter current is always measured using a separate current transformer between the inverter and single tank Measuring the falling edge of the high voltage in the measurement point HT on D1 board Long falling edge approx 2 ms Measuring the inverter current separate current transformer ...

Page 49: ...ent normal High speed HT and HT discharges Fig 6 Defective tube Defective high voltage capacitor Arcing between plus and minus side Replace single tank Abnormal inverter current e g triangle shaped HT dis charges Fig 9 and Fig 10 Defective high voltage transformer Defective diode strip Defective tube Replace single tank Abnormal inverter current e g asymmetric Fig 10 Defective inverter Replace inv...

Page 50: ... 03 09 03 CS PS 24 Medical Solutions 6 4 HT and single tank error diagnosis Exposure values 90 kV 2 0 mAs HTPEAK 20 kV div Inverter current 100 A div Fig 1 HTPEAK and inverter current inverter and single tank normal HTPEAK on D1 Inverter current Inverter current ...

Page 51: ...5 of 12 MOBILETT Plus HP Medical Solutions Rev 03 09 03 CS PS 24 Exposure values 40 kV 5 mAs HT 8 kV div 200 mV div Iinverter single tank 100 A div only the end of the exposure is shown Fig 2 HT and inverter current inverter and single tank normal Inverter current HT on D1 ...

Page 52: ...S PS 24 Medical Solutions 6 6 HT and single tank error diagnosis Exposure values 90 kV 5 mAs HT 20 kV div 500 mV div Iinverter single tank 50 A div only the end of the exposure is shown Fig 3 HT and inverter current inverter and single tank normal HT on D1 Inverter current ...

Page 53: ... 7 of 12 MOBILETT Plus HP Medical Solutions Rev 03 09 03 CS PS 24 Exposure values 33 kV 5 mAs HT 40 kV div 1 V div Iinverter single tank 100 A div only the end of the exposure is shown Fig 4 HT and inverter current inverter and single tank normal HT on D1 Inverter current ...

Page 54: ... Rev 03 09 03 CS PS 24 Medical Solutions 6 8 HT and single tank error diagnosis Exposure values 133 kV 5 mAs HTPOS HTNEG 2 V div 20 kV div 200 µs div only the end of the exposure is shown Fig 5 HTsignal inverter and single tank normal HTPOS on D1 HTNEG on D1 ...

Page 55: ... 12 MOBILETT Plus HP Medical Solutions Rev 03 09 03 CS PS 24 Exposure values 133 kV 5 mAs HTPOS HTNEG 2 V div 20 kV div 200 µs div only the end of the exposure is shown Fig 6 HTsignal arcing between plus and minus side defective tube Replace single tank HTNEG on D1 HTPOS on D1 ...

Page 56: ...cal Solutions 6 10 HT and single tank error diagnosis Exposure values 133 kV 5 mAs HTPOS HTNEG 2 V div 20 kV div 100 µs div only the end of the exposure is shown Fig 7 HTsignal high speed HTNEG discharges defective tube filament transformer wires to the cathode HTPOS on D1 HTNEG on D1 ...

Page 57: ...Rev 03 09 03 CS PS 24 CH1 20 mV div 100 A div 10 µs div inverter current CH2 500 mV div 20 kV div HT CH1 Inverter current 50 A div 10 µs div Fig 8 High speed HT discharges defective tube transformer capacitor Fig 9 Abnormal inverter current defective single tank HTPOS on D1 Inverter current CH1 CH2 Inverter current T ...

Page 58: ...s 6 12 HT and single tank error diagnosis CH1 Inverter current 50 A div 20 µs div CH1 I V div 40 kV div 20 µs div HT CH2 100 A div inverter current Fig 10 Abnormal inverter current defective inverter Fig 11 Abnormal inverter current defective inverter Inverter current T T HT on D1 Inverter current ...

Page 59: ... electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered charged until the protective measures listed in t...

Page 60: ...42 and P11 P40 see Fig 4 Remove power conversion unit Fig 3 Fig 4 Electric shock hazard Risk of physical injury Check to ensure that there is no battery voltage 0V between contact bar P1 and P2 pos 1 and pos 2 Fig 4 Check to ensure that the capacitor voltage between contact bar P1 and P3 pos 1 and pos 3 Fig 4 is 2 V Check to ensure that the capacitor voltage between contact bar P1 and P4 pos 1 and...

Page 61: ...ical Solutions Rev 03 09 03 CS PS 24 Pull out capacitor bank M11 7 Remove the cover with the cassette compartment Remove the warning sign placed in front of the batteries Remove the cable ties pos 1 Fig 5 Remove the two screws pos 1 Fig 6 Remove the capacitor bank M11 pos 2 Fig 6 Fig 5 Fig 6 MOB00630 1 2 1 ...

Page 62: ... power conversion unit see section Pull out power conversion unit M10 on Page 7 1 Make sure the capacitor units both M10 and M11 are discharged Replace U301 pos 4 Fig 7 Exchange of capacitors of M10 7 Remove power conversion unit see section Pull out power conversion unit M10 on Page 7 1 Disconnect P31 P11 Remove the four screws two on each side that keeps the connection plate Remove the two screw...

Page 63: ... U11 pos 1 Fig 9 Exchange of capacitor bank M11 7 Remove power conversion unit see section Pull out power conversion unit M10 on Page 7 1 Remove capacitor bank see section Pull out capacitor bank M11 on Page 7 3 Exchange of capacitors of M11 7 Remove power conversion unit see section Pull out power conversion unit M10 on Page 7 1 Remove capacitor bank see section Pull out capacitor bank M11 on Pag...

Page 64: ...w batteries with a digital multimeter The terminal voltage should be at least 12 42 V Remove the cover with the cassette compartment and the warning sign Remove the two screws pos 1 Fig 12 from the battery bank you want to replace Pull out the rail with the batteries and open the fastening strap Replace the batteries After remounting the covers fully charge the batteries Fig 11 Fig 12 For proper f...

Page 65: ...Plus HP Medical Solutions Rev 03 09 03 CS PS 24 Replacement of battery charger board D201 7 Remove the cover with the cassette compartment Remove K201 202 203 on D201 Remove the front screw pos 1 Fig 13 Remove the two back screws pos 1 Fig 14 Fig 13 Fig 14 Fig 15 MOB00635 1 MOB00633 1 MOB00634 1 ...

Page 66: ...ht cover and the cover with the cassette compartment Remove the two screws pos 1 Fig 15 Disconnect K203 Replace the battery indicator If the MOBILETT Plus HP is equipped with the DAP measuring system optional The power supply for the DAP measuring system must be discon nected during this procedure Make sure to remember how the cables were connected and if needed use the Installation Instructions D...

Page 67: ...ter Read out the mAs limit refer to the section P15 upper mAs limit Read out the kV step and limit refer to the section P14 Number of kV steps and upper kV limit Loosen the screws of the upper system cover and remove it Loosen the screws and remove the protection plate Locate the battery refer to the wiring diagram page 110 To avoid damage to components or assemblies ensure compliance with ESD gui...

Page 68: ... ON S 1 1 on D1 Perform the adaptation according to section P10 Fast adaptation Set the selected mAs limit refer to the section P15 Upper mAs limit Set the selected kV step and limit refer to the section P14 Number of kV steps and upper kV limit Read out the exposure counter refer to the section P16 Show the exposure counter Switch off S 1 1 on D1 OFF Reattach the system upper cover Make an exposu...

Page 69: ...crews that fixes the cable winder assembly pos 1 Fig 2 Pull out the cable winder assembly by approximately 10 cm Disconnect the main switch element by turning the red lock counterclockwise pos 1 Fig 3 Disconnect the wires at U9 U10 and ground connection pos 2 Fig 3 Fig 2 Fig 3 Sharp edge The brake handle could be damaged Lock the brake handle otherwise it will be damaged by the sharp upper edge of...

Page 70: ... cable ties pos 1 Fig 5 Remove the four screws and four nuts pos 2 Fig 5 and Y plate pos 3 Fig 5 Disconnect the cable from upper plate pos 1 Fig 6 Remove the upper plate and distance ring pos 2 Fig 6 Loosen the brake carefully to loosen the tension of the cable winder spring Remove the securing screw pos 1 Fig 8 Pull out the cable winder Fig 4 Fig 5 Fig 6 MOB00625 1 MOB00620 1 2 3 4 MOB00621 1 2 3...

Page 71: ...o be replaced go to B If the mains cable has to be replaced Remove the four screws pos 3 Fig 6 Remove the connection plate and disconnect the mains cable pos 1 Fig 7 Install the new mains cable and connection plate B Reinstall the ring cable stop and plug Reinstall the cable winder Reinstall the securing screw pos 1 Fig 8 Fig 7 Fig 8 Wind the mains cable to the cable winder without any play 1 MOB0...

Page 72: ...nder and brake function Reinstallation is performed in the reverse order Attach three new cable ties pos 1 Fig 4 Fig 9 The cable winder should not rewind by itself The brake force is adjusted via the right screw nut clockwise stronger pos 1 Fig 9 nut counterclockwise softer During reinstallation pay special attention to the shelf of the power transmission and the rail of the cable winder assembly ...

Page 73: ...ndicator see section replacement of battery indicator Remove the four screws two on each side that fix the cable winder assembly pos 1 Fig 2 Pull out the cable winder assembly by approximately 10 cm Disconnect the switch element by turning the red lock counter clockwise pos 1 Fig 3 Sharp edge The brake handle could be damaged Lock the brake handle otherwise it will be damaged by the sharp upper ed...

Page 74: ...ection from Color S11 2 BATT RD S11 15 K201 3 BU S11 3 K202 3 BU S11 16 Fuse U9 BU S11 10 K52 3 BK S11 19 K52 1 BU S11 12 S11 12 K104 1 K202 2 RO YE S11 21 S11 21 K104 4 BATT BK BK S11 13 Fuse U10 BK S11 23 K301 2 BU S11 14 K201 1 BK S11 24 K301 1 RO During reinstallation pay special attention to the shelf of the power transmission and the rail of the cable winder assembly which must be under the ...

Page 75: ...he lamp housing is in front of the cover opening Remove the protective plate 2 covering the collimator lamp by loosening not removing the screws marked B by one turn Do not adjust screws C D or E Fig 2 Remove the defective lamp and replace it with a new lamp Fig 3 Do not touch the bulb with bare fingers See list of spare parts Reinstall the protective plate Tighten the screws marked B Fig 1 Fig 2 ...

Page 76: ...average illumination shall be based upon measurements made in the approximate center of each quadrant of the light field Fig 4 If the illumination is less than 180 lux check the lamp supply Refer to wiring diagram X037E page 180 Fig 4 Fig 5 Fig 6 Equipment required Lux meter If the MOBILETT is equipped with a DAP measuring system remove the DAP ionization chamber first ILight field 1 4 I1 I2 I3 I4...

Page 77: ...s on the control panel Release an exposure Develop the film and measure the deviation between the light and the radiation field Acceptable deviation 1 7 of SID Fig 6 If the deviation is more than 1 7 adjust with the screws marked C and D Fig 2 to move the light field closer to the radiation field Repeat the test with a new exposure If necessary adjust again until the deviation between the light fi...

Page 78: ...t and repairs on the collimator Replacing the collimator 9 Switch off the unit and disconnect the power plug Turn the single tank so that the collimator is facing upwards Fig 7 Secure the arm and the single tank with a rope Fig 7 Remove covers A and B Remove collimator cover C Fig 7 Equipment required rope C A B ...

Page 79: ...Rev 03 09 03 CS PS 24 Disconnect the cable to the connection terminal board D Fig 8 Disconnect K71 from board D70 Fig 8 Remove the cable ties on the left and the right side Fig 8 Remove the five cable ties according to F Fig 9 Fig 9 Fig 8 MOB00648 D E E E E cable tie right side cable tie left side D70 K71 MOB00650 F F F F ...

Page 80: ... Fig 11 show how the cable tie on the right side is mounted Repeat for the left side but with the cable tie mirror inverted Reconnect K71 to board D70 Fig 8 Replace the five cable ties shown in Fig 9 Make sure they are fastened exactly as shown in the figure Rotate the collimator through the whole interval and make sure the cable ties do not come in contact with the collimator moving parts Reattac...

Page 81: ...erage illumination shall be based upon measurements made in the approximate center of each quadrant of the light field Fig 12 If the illumination is less than 180 lux check the lamp supply Refer to wiring diagram X037E page 180 Fig 12 Fig 13 Fig 14 Equipment required Lux meter If the MOBILETT is equipped with a DAP measuring system remove the DAP ionization chamber first ILight field 1 4 I1 I2 I3 ...

Page 82: ...he cassette Collimate the light field to 25 x 25 cm 10 x 10 Mark the four corners with coins and mark one of the corners with two coins Fig 13 Set 52 kV 2 0 mAs on the control panel Release an exposure Develop the film and measure the deviation between the light and the radiation field Acceptable deviation 1 7 of SID Fig 14 Equipment required Cassette X ray film and coins If the MOBILETT is equipp...

Page 83: ...4 If the deviation is more than 1 7 loosen the Allen screws marked E slightly and move the rotary flange to the desired position Tighten the screws marked E Fig 15 Repeat the test and adjustment of the rotary flange position until the deviation between the light and radiation fields is within the tolerance specified Reinstall covers A and B ...

Page 84: ...MOBILETT Plus HP SPR8 220 061 03 Page 10 of 10 Siemens AG Rev 03 09 03 CS PS 24 Medical Solutions 9 10 Replacement and repairs on the collimator This page intentionally left blank ...

Page 85: ...must not deviate by more than 0 6 mm The measurements must be performed with the arm in the uppermost and lowermost positions If not parallel loosen the locking nuts and adjust by turning the pull rod High Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete sy...

Page 86: ...an 35 mm Fig 3 If the visible part of the adjustment rod is longer than specified the single tank and the arm might fall If any adjustment is needed the single tank should be secured in its uppermost position with a ceiling support Fig 2 After the single tank has been secured the two nuts can be loosened and the adjustment rod can be turned Lock the rod with the nuts and repeat the parallelism che...

Page 87: ...in the column Fig 4 and the lining in the lower joint Fig 5 Check that the arm system stops in any position If does not stop but moves lower or higher Adjust the arm system with the adjustment screw Fig 6 until it balances in all positions If the arm moves lower the screw must be tightened if it moves up the screw must be loosened Fig 4 For upper arm stability Fig 5 For lower arm stability Fig 6 F...

Page 88: ...les in the cover Fig 4 Loosen the screws completely with a 4 mm Allen wrench Retighten the screws until there is no play Tighten the screws evenly until the upper arm holds its position but is still easy to move Lower arm If the lower arm does not hold its position it must be adjusted Fig 5 Loosen the screw completely Retighten the screw until there is no play Tighten the screw until the lower arm...

Page 89: ...ust be adjusted Fig 7 Loosen the screw completely Retighten the screw until there is no play Tighten the screw until the fork holds its position Movement of the single tank If the single tank rotates too easily or does not hold its position in the fork Remove the caps on the fork Tighten or loosen the friction adjustment one on each side of the fork Fig 8 Fig 7 Fig 8 MOB00466 MOB00580 ...

Page 90: ...6 of 28 Siemens AG Rev 03 09 03 CS PS 24 Medical Solutions 10 6 Mechanical systems Movement of the collimator Remove the collimator cover Adjust the collimator movement resistance with the screw 1 Fig 9 Reattach all covers Fig 9 MOB00650 1 ...

Page 91: ...g hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered charged until the protective measures ...

Page 92: ...m damage Remove battery charger D201 and motor power unit D102 see section 7 and 11 Disconnect all cables ground connections and K68 according to Fig 11 Remove the locking rings Remove the bearing rings Remove the shaft Let the turn plate down and remove it The ceiling suspension must be able to hold a weight of 100 kg since the entire weight of the arm will be on the ceiling support once the spri...

Page 93: ... and check through the hole for the adjustment screw that the front of the spring pack with recess is visible Mount the adjustment screw and tighten until the spring pack is held in position Fig 12 Risk of injury to the hands The strong tension in the spring pack could cause undesirable actions Be careful during the following procedures If the spring pack does not lower there is still spring tensi...

Page 94: ...cable and K68 Reinstall the supporting wheels Remove the ceiling support carefully and check that the single tank remains in the uppermost position by itself If not tighten the adjustment screw Move the arm into the park position Lower the unit to the floor and block the rear wheels Check the arm and single tank movement If necessary adjust according to section Adjustment of the arm system Reattac...

Page 95: ...tery charger D201 and motor power unit D102 see section 7 and 11 Disconnect all cables ground connection and K68 according to Fig 13 High Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charge...

Page 96: ...urn plate Reinstall the shafts Reinstall the bearing rings Reinstall the locking rings Connect the ground cable and K68 Reinstall the supporting wheels Reconnect the KBATT plugs Reattach the side covers and the cover with the cassette compartment Set switch S10 in OFF position to charge the capacitor bank Reattach the system upper cover Connect the unit to mains power supply outlet and switch it o...

Page 97: ...igh Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered charged unt...

Page 98: ...llimator according to the information in chapter 9 Disconnect all electrical connections to the single tank Remove the screws and nuts Fig 17 bolts placed in the ends of the axis of rotation Lift up the fork and remove the single tank Do not turn the fork around The new single tank has to be installed in the same position as the old one Replace the locking nuts with new nuts enclosed with the new ...

Page 99: ...ation in chapter 9 Tighten the adjustment screw Fig 16 so that the single tank is balanced Set switch S10 in the OFF position Fig 18 MOB00651 BK Black BU Blue RD Red YE Yellow GN YE Green yellow WH White VT Violet OG Orange BN Brown Voltage divider HT BK WH BK OG YE RD GN BK BK BK Temperature sensor HT transformer Resistor for mA measuring mA pos Stator for the rotation BK BU RD BN BK GN YE BK BN ...

Page 100: ...acement of collimator Reattach all covers on the single tank Adjust the adjustment screw so that the single tank is balanced If any problems occur see section Adjustment of arm system Use the service program P16 Show the exposure counter and record the values of the exposure counter in the service protocol and in the unit documentation Use the service program P10 Fast adaptation to adjust the fila...

Page 101: ... C Fig 19 High Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered ...

Page 102: ...all electrical connections to the single tank Remove the supporting hub in the rotation axis of the fork Remove all cable clamps and cable ties on the arm and the chassis Disconnect the single tank and the fork from the arm Disassemble the fork so the cables can be removed Disconnect the chassis connections and remove the cables Fig 20 Fig 20 Danger of injury The arm may move uncontrollably when t...

Page 103: ...nstall the collimator and its wires Attach only cover C Connect all connections and reinstall all cable clamps Install new cable ties Fig 21 MOB00651 BK Black BU Blue RD Red YE Yellow GN YE Green yellow WH White VT Violet OG Orange BN Brown Voltage divider HT BK WH BK OG YE RD GN BK BK BK Temperature sensor HT transformer Resistor for mA measuring mA pos Stator for the rotation BK BU RD BN BK GN Y...

Page 104: ...tween the handle and the foot while keeping the single tank on the table Tighten the adjustment screw until the single tank and arm are balanced Refer to the section Adjustment of arm system Switch on the collimator lamp and check compliance of the light and radiation fields with the specifications in the section Replacement of collimator Reattach the remaining covers Do not stretch the cable too ...

Page 105: ...make sure that the lining is facing the right way If the braking linings meet the requirements and the braking force is still low check the tension of the brake wire Remount the rear wheels Fig 22 High Voltage Life threatening hazard of electric shock Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system...

Page 106: ... power required for lifting the brake handle to locked position with a dynamometer If the power is not between 100 and 120 N an adjustment will be necessary Adjusting brake force 10 There are two different types of brake arms depending on how new the unit is Identify the type on the affected unit from Fig 23 and follow the proper procedure Adjustment for Type 1 Tighten the adjusting screw with the...

Page 107: ...nuts pos 3 Fig 24 Adjustment for Type 2 Adjust the screw pos 1 Fig 25 so that the arm can fall back just enough to release the brake Lock its position with the nut Tighten the adjusting screw with the brake released pos 2 Fig 25 until the required brake force is obtained After adjustments make sure the brake wire link is oriented according to pos 2 Fig 24 Lock its position using the nuts pos 3 Fig...

Page 108: ...ece of wood Block the rear wheels so that they cannot turn Remove the locking rings pos 1 Fig 26 Remove the wheel shaft so that the supporting wheel can be removed Install the new support wheel and secure the shaft with the locking ring Check that the wheels move easily Remove the wood block and lower the unit Equipment required 1 piece of wood approx 50 x 70 x 500 mm Fig 26 MOB00612 1 ...

Page 109: ...tion lining 10 Remove the joint covers Remove the locking nut Remove the screw and disc springs Replace the horizontal friction lining Remount the screw and disc springs Fig 27 Secure the screw with the locking nut Adjust the horizontal friction linings Refer to the section Adjustment of the friction linings Page 10 4 Reattach all covers Fig 27 Locking nut Disc springs Friction lining ...

Page 110: ...d on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered charged until the protective measures listed in this section have been performed Equipment required Large caliper rope ceiling support The ceiling suspension must be able to hold a weight of 100 kg since the entire weight o...

Page 111: ...03 CS PS 24 Loosen the adjustment screw so that the arm is no longer balanced However the spring mechanism remains in position Fig 29 Do not allow the spring mechanism to fall out Remove the screw and washer from the upper counter bearing Fig 30 Remove the friction linings Fig 29 Fig 30 MOB00626 Adjustment screw ...

Page 112: ...ll the upper counter bearing Tighten the screws Check that there is no braking action on the counter bearings Tighten the adjustment screw Make sure that the spring mechanism is under tension before releasing the ceiling support Attach the column cover and side covers and the cover with the cassette compartment Check parallelism see section Parallelism Adjust counterbalance see section Counterbala...

Page 113: ...lectric shock hazard exists Never work with the system open if the batteries are still connected and the capacitor is charged If the batteries are connected the complete system is powered on The capacitors in M10 and M11 may still be charged even if the system is switched OFF and the mains cable is disconnected The capacitors in M10 and M11 must be consid ered charged until the protective measures...

Page 114: ...not use the parking brake Remove the wheel as shown in Fig 2 Loosen the 2 screws A Fig 3 Loosen the tension bearings B Fig 3 with a 13 mm wrench Remove the belt Install the new belt Tighten the tension bearings B Fig 3 and the screws A Fig 3 Rotate the large toothed wheel by hand and check for smooth operation and that the belt is aligned over the toothed wheels Adjust the tension as described und...

Page 115: ...1 Loosen the screws A Fig 4 The tension of the transmission belt can then be adjusted with a 13 mm wrench Press the special adjustment device to the transmission belt and hold a finger on top of it When the button C Fig 5 is in the same level as the top of the adjustment device a proper pressure is applied Fig 4 Fig 5 C MOB00460 A 1 1 5 mm ...

Page 116: ... on the two tension bearings to a minimum distance of 1 1 5 mm between the bearing and the washer Fig 4 The tension of the transmission belt is right when the adjustment device and the belt are in contact in exactly three points 1 Fig 6 In 2 Fig 6 the belt is too tight and in 3 Fig 6 the belt is too slack Tighten the screws A Fig 4 Remount the wheel Fit the covers Fig 6 MOB00278 1 2 3 ...

Page 117: ...de where the motor is being replaced Refer to Fig 7 for electrical connections Tilt the unit and support the affected side with a block of wood Fig 7 Motor power unit electrical connections Fig 8 Removing wheel and motor Equipment required Ratchet with Allen socket MOB00477 Battery K202 Motor control buttons K106 Battery indicator Left motor Right motor Power supply Power supply K203 Motor power u...

Page 118: ...otor unit inward through the opening in the chassis Install the new motor with the six screws Install the motor power unit D102 or battery charger D201 Refer to Fig 7 for electrical connections Install the wheel with the four screws Remove the block of wood Reattach the covers Repairs to the motor power unit 11 The motor power unit should not be repaired If the motor power unit is defective with t...

Page 119: ... of 8 MOBILETT Plus HP Medical Solutions Rev 03 09 03 CS PS 24 Remove the two back nuts 2 Fig 10 Pull out the motor power unit Replace the motor power unit Replacement of fuse 4 A 11 Pull out the motor power unit Replace the fuse 3 Fig 11 Fig 10 Fig 11 3 2 2 ...

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Page 121: ...ation procedure 12 System OFF Disconnect the DAP ionization chamber connector which is connected to board D70 pos 1 Fig 1 Connect the DAP calibration tool between the connector and board D70 System ON Set up the MOBILETT and the dose meter as shown in Fig 2 It is irrelevant which connector is the input or the output of the DAP calibration tool Measurement errors If a semiconductor detector is used...

Page 122: ...nd then the width and the length of the light field on the surface For optimal accuracy place an unexposed film cassette on the surface and measure the exposed area width and length on the film after an exposure has been released Measure the Focus light field surface distance B Fig 2 Calculate the reference area according to the following formula Set kV to 102 and mAs to 20 and release an exposure...

Page 123: ...gative comparison values or the Down button for positive comparison values Pressing a button once corresponds to approximately 0 5 change of the comparison value Repeat the calibration sequence until the deviation is less than 5 System OFF Remove the DAP calibration tool and reconnect the DAP ionization chamber to board D70 pos 1 Fig 1 System ON Press the reset and the test button to complete the ...

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Page 125: ...09 03 CS PS 24 Changes to previous version 13 Page 1 2 Section Required tools measurement and auxiliary devices revised Page 5 1 Section Entering service mode Err changed to vEr Page 7 6 Section Replacement of batteries B10 A512 10 0 SR changed to A512 10 S Chapter 12 Completely revised ...

Page 126: ...MOBILETT Plus HP SPR8 220 061 03 Page 2 of 2 Siemens AG Rev 03 09 03 CS PS 24 Medical Solutions 13 2 Changes to previous version This page intentionally left blank ...

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