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Philips Medical Systems

Converter test kit OPTIMUS

for OPTIMUS 50/65/80 generators

release 3.x with converters 4512 104 7231x

4512 104 91681

Level 1 Documentation

This document and the information contained in it is strictly reserved for current Philips Medical Systems ("Philips") personnel, Philips licensed

representatives and Philips customers who have purchased a valid service agreement for use by the customer's designated in-house service

employee on equipment located at the customer's designated site. Use of this document by unauthorized persons is strictly prohibited. This

document must be returned to Philips when the user is no longer licensed and in any event upon Philips' first written request.

Printed in Hamburg

Federal Republic of Germany

Manual Order No. 4512 984 22723 Vers. 00

Содержание Optimus

Страница 1: ... Philips customers who have purchased a valid service agreement for use by the customer s designated in house service employee on equipment located at the customer s designated site Use of this document by unauthorized persons is strictly prohibited This document must be returned to Philips when the user is no longer licensed and in any event upon Philips first written request Printed in Hamburg F...

Страница 2: ...tment This docu ment must be returned to Philips when the user is no longer licensed and in any event upon Philips first written request Warranty Disclaimer Language Philips provides this DOCUMENT without warranty of any kind implied or expressed including but not limited to the implied warranties of merchantability and fitness for a particular purpose Limitations of Liability Language Philips has...

Страница 3: ...or Th Frenschek Type no 4512 104 91681 List of Pages and Drawings Manual Order No 4512 984 22723 released 05 2008 1 3 4 53 08 0 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 4512 984 22723 Vers 00 CSIP Level 1 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED 3 ...

Страница 4: ...s that are welded at breakers and contactors 9 4 Converter checks EQ frontal and E2Q rear 11 4 1 Visual converter check 11 4 2 Measuring of converter parts 11 4 2 1 Rectifier check 11 4 2 2 IGBT check 11 4 2 3 Overvoltage diode check 12 4 2 4 Resistor check PCB versions 4512 108 0862x 0934x 12 4 2 5 Power cable harness check 13 4 2 6 Resonance capacitor check 13 5 Check of the high voltage transfo...

Страница 5: ...al information 41 15 1 1 1 Connecting and setting the scope 42 15 1 1 2 Deactivating the kV controller 43 15 1 1 3 Setting of exposure data 43 15 1 1 4 Adjustment of the factor for duty cycle 43 15 2 Tube conditioning 45 15 2 1 General Information 45 15 2 2 Preconditions Program settings 46 15 2 3 Procedure 47 15 3 List of checked parts of generator S N 51 15 4 List of checked parts of generator S...

Страница 6: ...secondary Test cable with resistor Test cable with diode This documentation 1 2 TOOLS Standard tools Extension boards C 96 pin Dual trace oscilloscope with 2 probes for signals 1 probe for external triggering Multimeter with diode test option 1 battery 1 5V D cell R20 preferred C cell R14 or AA cell R6 possible Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters...

Страница 7: ...ed to just turn the fuses back on to prevent further damage A qualified person like a Philips field engineer trained on Optimus must visit the site 2 3 PREREQUISITES BEFORE CHECKING THE GENERATOR CAUTION Do not remove PCB kV power from the IGBT transistors Electrostatic discharge and mobile phone waves can damage and destroy IGBTs when gate connections are open WARNING The generator must be switch...

Страница 8: ...st one contact is welded ENK2 phase 1 1 2 contactor ENK2 2422 132 06621 phase 2 3 4 3 aux contacts NO 2422 135 04355 phase 3 5 6 1 aux contact NC 2422 135 04023 or successor contactor 2422 132 07381 succ aux cont block 2422 135 04464 succ R C circuit 2422 135 04661 Record the conditions in the checklist last pages If contacts are found welded replace contactor its auxiliary contacts or contact blo...

Страница 9: ... or its mains rectifier filter could have happened Springs can be resoldered If the springs have to be resoldered use as little solder as possible Check that the ceramic resistor bodies do not have cracks In case of cracks the springs must be resoldered 3 3 CHECK FOR CONTACTS THAT ARE WELDED AT BREAKERS AND CONTACTORS Switch OFF breakers ENF1 and ENF2 ENF1 L1 T1 automatic circuit breaker ENF1 Opti...

Страница 10: ...ontal and rear converter from contactor ENK1 1 3 5 Measure with an ohmmeter each line against the others of each converter There should be no short circuit the meter should display 2MΩ 5 after at least 20 seconds filter resistors Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 10 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL R...

Страница 11: ... test option of meter 4 2 1 Rectifier check Open the right side of the converter s to get access to the mains rectifier L1 L2 L3 Rectifier EQV5 layout MINUS PLUS PLUS MINUS L1 L2 L3 L1 L2 L3 450mV 10 450mV 10 Fig 1 Record the conditions in the checklist last pages 4 2 2 IGBT check Legend Typical values when part is OK Typical values of defective parts If at least one test fails the converter must ...

Страница 12: ...nk plate MINUS PLUS PLUS MINUS Cathode V500 V501 2 3 Anode V500 V501 2 3 310mV 10 Cathode V500 V501 2 3 Anode V500 V501 2 3 Cathode V5xx Anode V5xx 0 Cathode V5xx Anode V5xx 0 Record the conditions in the check list last pages 4 2 4 Resistor check PCB versions 4512 108 0862x 0934x Check 2 groups of 3 parallel resistors R506 507 508 and R509 510 511 With 39Ω 5 per group Each resistor must have a re...

Страница 13: ...inally a high resistance or open connection Once a high resistance or open connection is displayed reverse the measuring lines If it comes again to an unstable resistance display with a high resistance or open connection display at the end the capacitor should be OK If a capacitance measuring device is available it should display 8µF 5 apart from the meter tolerance If a capacitor is defective sho...

Страница 14: ...asure 1 with high voltage cables and tube connected 2 with high voltage cables only 3 without high voltage cables connected 5 1 ANALYSIS 1 and 2 have to look almost the same symmetry and amplitude When 1 has a lower amplitude or a different kV behavior compared to 2 and 3 the tube might be defective 3 should have a steeper faster discharging ramp as the capacitance of the HV cable is missing tank ...

Страница 15: ...must be replaced Check against the following chart Fig 4 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED 15 ...

Страница 16: ...racked tube or the loss of its vacuum could be a reason to destroy the converter Record the conditions in the check list last pages Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 16 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv test Optimus ...

Страница 17: ...ol EZ130 WARNING All followings checks must be made with mains power Check that the converter mains lines still have no connection to mains at ENK1 1 3 5 Switch ON all generator breakers and the mains supply Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS R...

Страница 18: ...nds like an acceleration process Switch ON the generator and perform an audible check at the tube housing during the generator start up for further explanations see chapter 10 As the mains lines are not connected to the converters error messages 02HI and 02HJ come up converter DC is 0V therefore out of range Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 45...

Страница 19: ...ivers Drivers 1 and 2 are supplied by chopper 1 while drivers 3 and 4 are supplied by chopper 2 The common zero point is the emitter Emitter 15 V supply at heat sink 15 V at resistor E1 X101 A100 3 X102 E2 X201 A200 3 X202 E3 X301 A300 3 X302 E4 X401 A400 3 X402 The kV driver test is software controlled via PC Due to the missing PREP and exposure requests the signals EN_X_C and CTRL_X_C have to be...

Страница 20: ...sh a constant short circuit to avoid problems after the test The test itself is short The pulse time is 2 5 s long but the PC screen displays completed after 5 s kV_control sends pulses for 5 s but the hardware timer on the kV_control inhibits more pulses after 2 5 ms Within this time the actual kV must be on the nominal value Test 1 Optical coupler activation of the gate Test 1 Input and output P...

Страница 21: ...st 2 inputs only Check if the signal pattern of all 4 control signals look the same as on the diagram Of course only 2 channels can be seen at the same time but the ONs and OFFs must be equal to the drawing Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RE...

Страница 22: ...its Compare control signals of both units The signals at R25 of unit 1 must be absolutely equal to the signal at R25 at unit 2 If no problems are visible all wave forms are as they should be Switch off the generator with ENF1 Remove links EN_X_C and CTRL_X_C at the backpanel X76 and X74 Remove oscilloscope probes Close the kV power part s Connect mains power lines at ENK1 1 3 5 Switch on ENF1 and ...

Страница 23: ...ormers must be inserted the same way Polarity secondary transformer pins are marked with 1 and 2 Reestablish primary cable s at QC3 1 too Reestablish all connections mains cables of converter s at ENK1 1 3 5 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS R...

Страница 24: ...placed If a decrease of anode speed is not audible within several minutes the vacuum is still OK Switch the generator back ON A generator with high speed rotor control brakes the tube automatically chapter 8 At generators with low speed rotor control wait for ready condition push PREP once and let go of the PREP switch to brake the tube Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators r...

Страница 25: ...ative slope trigger level 2 5V if a third probe is not available use one channel for triggering with CTRL_X_C and check anode and cathode side individually time base 200µs div trigger delay 1div Explanation With these hardware modifications and exposure settings the exposure time is only 1ms The additional resistor simulates an emission current of 500mA which lets the mAs counter of mA control ter...

Страница 26: ...our possible cases of the table Case 1 Both anode and cathode side have the same kV rising slope and value up to the point when the exposure terminates which is almost the set kV If so increase kV value in 10kV steps up to the programmed max kV tube limit or the max value which is used for application and check results with the table cases 1 2 and 3 accordingly settings 50mA 10ms or 0 5mAs for a n...

Страница 27: ...t kV or 0kV 0kV or set kV interchange anode and cathode HV cables at both sides tube and transformer 2nd exposure 0kV or set kV set kV or 0kV HV cable at the 0kV side defective case 4 1st exp 40kV 0kV 0kV remove anode HV cable from tube and HV transformer side this test with 40kV only no higher kV 2nd exp 40kV 40kV or 20kV 0kV or 20kV tube defective Compare measuring results with examples of oscil...

Страница 28: ...ig 12 adapted tube anode cable short circuit non adapted tube anode cable short circuit Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 28 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv test Optimus ...

Страница 29: ...al value AV_HT 20kV Volt positive slope trigger value according to probe divider Optimus 65 80 Set the trigger point level at channel 1 or 2 according to the expected amplitudes see charts Time base According to charts A trigger delay time settings see charts can be useful to see the start of the signals NOTE Digital oscilloscopes sometimes display waveforms and spikes that do not exist or only pa...

Страница 30: ...t values must be within the range of the lower chart 10 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 30 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv test Optimus ...

Страница 31: ...lues must be within the range of the lower chart of page 26 10 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED 31 ...

Страница 32: ...ransformer The primary current values must be within the range of the lower chart 10 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 32 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv test Optimus ...

Страница 33: ...page 28 10 12 1 MEASURING OF THE RESONANCE FREQUENCY The resonance frequency of the parallel primary coils anode and cathode at a 50kW generator driven by 1 converter only or Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED 33 ...

Страница 34: ...1 Optimus 50 If the resonance frequency is not within the specified range the suspected part might be the HV transformer the resonance capacitor s of the converter Optimus 65 80 Both resonance frequencies must be within the specified range If not the suspected part might be the HV transformer the resonance capacitor s of the individual converter 12 2 MEASUREMENT OF KV BEHAVIOR WITH AN ADAPTED TUBE...

Страница 35: ...lloscope trace as break in of kV within a time of 10µs It might be a problem of the tube either because of its age or because it has not properly been conditioned In case of errors 02HG warning in the background and 02HH error realign the duty cycle factor according to alignment of Function Unit kV see appendix If a filament is not adapted adapt it before realigning the duty cycle otherwise the ad...

Страница 36: ...Fig 24 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 36 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv test Optimus ...

Страница 37: ... proceed with next kV step If the last exposure still arcs go one kV step back and start again with the normal procedure If this routine has been performed three times without improvement replace the tube kV step 1 kV step 2 kV step 3 kV step 4 kV step n Exposure with Arc 3 exposure s with same parameter with 10s pause between each exposure ARC yes no max 3 times Exposure sequence Fig 25 NOTE If a...

Страница 38: ... 1 110 50 10 seconds pause 10 seconds pause 110 max mA 100 1 110 100 1 minute pause 1 minute pause 120 10 50 1 120 0 5 120 10 500 1 120 5 120 200 250 1 120 50 10 seconds pause 10 seconds pause 120 max mA 100 1 120 100 1 minute pause 1 minute pause 130 10 50 1 130 0 5 130 10 500 1 130 5 130 200 250 1 130 50 10 seconds pause 10 seconds pause 130 max mA 100 1 130 100 1 minute pause 1 minute pause 140...

Страница 39: ...500 1 148 5 148 200 250 1 148 50 10 seconds pause 10 seconds pause 148 max mA 100 1 148 100 1 minute pause 1 minute pause 150 10 50 1 150 0 5 150 10 500 1 150 5 150 200 250 1 150 50 10 seconds pause 10 seconds pause 150 max mA 100 1 150 100 Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x Conv test Optimus CSIP Level 1 08 0 2008 Koninklijke Phi...

Страница 40: ... primary lines and reestablish the primary lines at the resonance ca pacitors Close the converter covers Put mains and the generator back ON Run a final system test with exposures and fluoroscopy where present Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 40 CSIP Level 1 08 0 2008 Koninklijke Philips Electronics N V ALL RIGHTS RESERVED Conv ...

Страница 41: ...verter unit Q kV_power PCB s Q100 part of the power converter unit IGBT transistors part of the power converter unit 3 Resonance capacitors part of the power converter unit 4 High voltage transformer An exchange of one of the marked parts requires a realignment of the factor duty cycle The factor duty cycle is stored in the memory of PCB CU EZ139 If the CU has to be replaced the CU complete backup...

Страница 42: ...inet chassis Channel 2 EZ130 X26 UCOMP 1V div Zero line 2 div from bottom of screen Probe GND one of the drilling holes at the front cabinet chassis Trigger external preferred CTRL_X_C backpanel EZX74 negative slope or internal channel 1 AV HT EZ130 X3 positive slope at 3V Probe GND one of the drilling holes at the front cabinet chassis Time base 5 or 10ms div trigger delay 1div NOTE A digital sco...

Страница 43: ...scribed in Appendix 15 2 TUBE CONDITIONING Disconnect the short link between X23 and X6 Start over this adjustment from chapter 15 1 1 2 onwards if the tube conditioning was successful Set kV and mA values according to the programmed tube limits a 141kV 200mA at kV_4 65 80kW b 125kV 100mA at kV_3 50kW 200mA at kV_4 65 80kW Set the exposure time 40ms 15 1 1 4 Adjustment of the factor for duty cycle...

Страница 44: ...or 141kV see scope figure 29 or 30 correct the factor duty cycle till UCOMP meets the required reference of 1V kV setpoint mA setpoint PCB type UCOMP Tolerance kV peak of AV HT Factor duty cy cle Date 141kV 200mA PCB kV_control 4 1V 0 5V 138kV Table 1 Factor duty cycle settings 141kV 150kV limit Example how to correct the factor duty cycle PCB kV_control 4 If the mean value of UCOMP is 1 5V increa...

Страница 45: ...rol 3 If the mean value of UCOMP is 1V increase the factor duty cycle in steps of 0 01 0 5V decrease the factor duty cycle in steps of 0 01 PCB kV_control 4 If the mean value of UCOMP is 0 5V increase the factor duty cycle in steps of 0 01 0 5V decrease the factor duty cycle in steps of 0 01 Check also the kV peak value AV HT not the overshoot it must be 125kV for 125kV setpoint Remove short link ...

Страница 46: ... procedure must not be started before relay ENK1 has been ener gized at least 2 minutes after the generator has been switched on Perform the following program settings temporarily for each tube connected to one of the assigned RGDVs Free cassette Select menu AGenT Program RGDV set A B RGDV 1 8 Data Set A Program setting Temporarily Original Tube Enable handswitch YES Syncmaster present NO Exposure...

Страница 47: ...RE SEQUENCE as an example The flowchart applies to the applicable kV range only e g 109kV is the max kV value for normal application set the next higher kV step 117kV NOTE Refer to flowchart EXPOSURE SEQUENCE If the tube arcs at a certain kV value switch another three exposures with same pa rameters and 10s pause between subsequent exposures In case of success no arcing anymore continue with next ...

Страница 48: ...100 100 1 minute pause 1 minute pause 110 10 50 1 110 0 5 110 10 500 1 110 5 110 200 250 1 110 50 10 seconds pause 10 seconds pause 110 max mA 100 1 110 100 1 minute pause 1 minute pause 120 10 50 1 120 0 5 120 10 500 1 120 5 120 200 250 1 120 50 10 seconds pause 10 seconds pause 120 max mA 100 1 120 100 1 minute pause 1 minute pause 130 10 50 1 130 0 5 130 10 500 1 130 5 130 200 250 1 130 50 10 s...

Страница 49: ...A 100 1 145 100 1 minute pause 1 minute pause 148 10 50 1 148 0 5 148 10 500 1 148 5 148 200 250 1 148 50 10 seconds pause 10 seconds pause 148 max mA 100 1 148 100 1 minute pause 1 minute pause 150 10 50 1 150 0 5 150 10 500 1 150 5 150 200 250 1 150 50 10 seconds pause 10 seconds pause 150 max mA 100 1 150 100 1 minute pause 1 minute pause Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erat...

Страница 50: ...alue with AGenT Program Tubes Tube Limits Max Tube Voltage Limit kV 117 As the max kV value has decreased now the field ADAPTED TO kV displays the max value after adaptation as well Set the RGDV programming to the original status if no adaptation procedure has to be executed Reset the generator Converter test kit OPTIMUS for OPTIMUS 50 65 80 gen erators release 3 x with converters 4512 104 7231x 5...

Страница 51: ...ctive Diode V503 EQ OK defective E2Q OK defective Diode V504 EQ OK defective E2Q OK defective Resistors R506 507 508 EQ OK defective E2Q OK defective Resistors R509 510 511 EQ OK defective E2Q OK defective Cable harness EQ 2 OK 1 defective E2Q 2 OK 1 defective Converter EQ OK defective unit barcode frontal _________ E2Q OK defective unit barcode rear 65 80kW only ________ Res capacitor C3 EQ OK de...

Страница 52: ...ctive Diode V503 EQ OK defective E2Q OK defective Diode V504 EQ OK defective E2Q OK defective Resistors R506 507 508 EQ OK defective E2Q OK defective Resistors R509 510 511 EQ OK defective E2Q OK defective Cable harness EQ 2 OK 1 defective E2Q 2 OK 1 defective Converter EQ OK defective unit barcode frontal _________ E2Q OK defective unit barcode rear 65 80kW only ________ Res capacitor C3 EQ OK de...

Страница 53: ...ctive Diode V503 EQ OK defective E2Q OK defective Diode V504 EQ OK defective E2Q OK defective Resistors R506 507 508 EQ OK defective E2Q OK defective Resistors R509 510 511 EQ OK defective E2Q OK defective Cable harness EQ 2 OK 1 defective E2Q 2 OK 1 defective Converter EQ OK defective unit barcode frontal _________ E2Q OK defective unit barcode rear 65 80kW only ________ Res capacitor C3 EQ OK de...

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