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Universal X-Ray MPX 525 Operation And Service Manual

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MPX 525 and 625
X-Ray Generator
Operation and Service Manual
This manual contains information
for the operation, installation,
and maintenance of the MPX 525 & 625 Generator
Non- Anatomically Programmed Version
(Non-APR)
Do Not Discard
Revison Date: 7/5/2005
8000-MPX 525/625
Revision A

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Summary of Contents for Universal X-Ray MPX 525

  • Page 1 MPX 525 and 625 X-Ray Generator Operation and Service Manual This manual contains information for the operation, installation, and maintenance of the MPX 525 & 625 Generator Non- Anatomically Programmed Version (Non-APR) Do Not Discard Revison Date: 7/5/2005 8000-MPX 525/625 Revision A...
  • Page 2 In the event of a malfunction that could, or has contributed to a patient or operator injury, please contact: In North America Del Medical Imaging Corporation 11550 West King Street Franklin Park, IL 60131 Tel: 847-288-7000 Toll Free Tel. 800-800-6006 Fax: 847-288-7011 In Europe Villa Sistemi Medicali...
  • Page 3 Revision History Revision Date Comments 7/5/2005 Initial Release...
  • Page 4 MANUAL IMPROVEMENT RECOMMENDATION We at Del Medical Imaging Corporation are most interested in improving the quality of the Technical Documentation we provide. Please identify improvements or corrections and fax them to our Technical Publications Department. Name________________________________________________ Dealership____________________________________________ Manual Part Number____________________________________ Device Name__________________________________________ Recommendation or Correction_____________________________________ ________________________________________________________________...

  • Page 5: Table Of Contents

    MPX 525/625 Generators Revision A Table of Contents Table of Contents INTRODUCTION ......................1 Damage in Transportation ................1 X-Ray Protection....................1 X-Ray Equipment Safety Recommendations...........2 Electrical Grounding..................2 X-Ray Tube......................2 Features and Benefits of the MPX 525 and 625 ..........3 OPERATING MANUAL....................5 Introduction ......................5 Power On/Off Procedure..................7 APX Control Console Description ..............8 Mode Selection ...................10...
  • Page 6 MPX 525/625 Generators Revision A Table of Contents Connecting 208 VAC Three Phase Power (30 kW Only) (636-5010P1 Transformer) ..................54 Connecting 480 VAC Three Phase Power (30 kW & 40kW) (636- 5010P1 Transformer) ................67 Connecting 208 VAC Three Phase Power (40 kW Only) (636-0070P1 Transformer) ..................81 Cable Index ................95 Cable Index Notes ..............95...
  • Page 7 MPX 525/625 Generators Revision A Table of Contents Calibrate kV ..................136 Calibration Verification ..............138 Alternate Calibration Procedure..............139 kV Calibration..................143 mAs Adjustment ................143 mAs Adjustment - Alternate Method without Dynalyzer™......144 mAs Calibration.................144 mA Fault Calibration ..................145 ........................146 Additional Optional Inspections..............147 Calibrate High Tension Transformer Balance ..........147 ©...
  • Page 8 MPX 525/625 Generators Revision A Table of Contents Calibration of SCR Hold Off Time ..............147 Boost Time Adjustment................148 AEC Inspection and Calibration ..............149 AEC Cable Interconnections................149 Connections for Ion Chambers on Main AEC Board ......149 AEC Communication Link Checkout ..........150 AEC Device Field Calibration Procedure ..........152 Required equipment: ..............152 Calibration Procedure.............153...

  • Page 9: Introduction

    MPX 525/625 Generator Revision A Introduction INTRODUCTION This manual contains the necessary instructions for proper operation, installation, adjustments and calibration of the MPX 525 & 625 High Frequency Generator. All persons operating or servicing this equipment need to have read this manual beforehand.

  • Page 10: X-Ray Equipment Safety Recommendations

    MPX 525/625 Generator Revision A Introduction Personal radiation monitoring and protective devices are available. Operators are urged to use them to protect against unnecessary radiation exposure. It is important that Operators and their supervisors be fully acquainted with applicable government radiation protection regulations. Many provisions of these regulations are based on recommendations of the National Council on Radiation Protection and Measurements.

  • Page 11: Features And Benefits Of The Mpx 525 And 625

    MPX 525/625 Generator Revision A Introduction the generator. Tube inserts of load capacities other than those for which the MPX 525 or 625 was configured may be permanently damaged if used with the incorrect tube loading program. Consult Del Medical Imaging Corporation for additional information.
  • Page 12 MPX 525/625 Generator Revision A Introduction General features: • Individual control of kV, mAs, mA and time with the availability of both two and three point operating modes • Liquid Crystal Display • Closed loop kV stabilization • Closed loop mA stabilization •...

  • Page 13: Operating Manual

    Operating Manual OPERATING MANUAL Introduction The Universal MPX is a high frequency, microprocessor based x-ray generator, which is designed for general radiographic applications. The operator’s control features a unique menu driven, soft button interface that makes it extremely easy to use.
  • Page 14 MPX 525/625 Generator Revision A Operating Manual • 3 Point Mode: Gives operator free selection of exposure techniques, including kV, mA, and Time. Additionally, the calculated mAs of the exposure will be displayed in the center portion of the LCD screen. Software will inhibit selection of techniques that are beyond the limitations of the x-ray tube.

  • Page 15: Power On/Off Procedure

    MPX 525/625 Generator Revision A Operating Manual Power On/Off Procedure To Power Up The APX 525 or 625 Generator: Turn the main power disconnect switch to ON Turn the power switch of the APX 525 or 625 control to ON. This switch is located on the left side of the operator control console Within a few seconds, all control panel indicators will illuminate, and an audible tone will sound during the Power-Up Self Test.

  • Page 16: Apx Control Console Description

    MPX 525/625 Generator Revision A Operating Manual APX Control Console Description The multi-function, membrane buttons and rotational knob are used either to make a selection from the alternatives listed in the display, such as the optional AEC mode, the APR Mode, or to select a technique parameter, such as to change the kV, time, mA, or mAs.
  • Page 17 MPX 525/625 Generator Revision A Operating Manual Single Function Buttons Button Description Pressing the button above this portion of the display will highlight the current value. The kV may be changed in single digit increments, using the rotational knob. Pressing the button above this portion of the display will highlight the current value.

  • Page 18: Mode Selection

    MPX 525/625 Generator Revision A Operating Manual Single Function Buttons Button Description Pressing the button adjacent to this portion of the display will toggle the current value between the 2 and 3 point technique modes. In 2 point mode, the operator selects only the kV and mAs of an exposure.

  • Page 19: Setting Default Startup Parameters

    MPX 525/625 Generator Revision A Operating Manual Setting Default Startup Parameters Default startup techniques may be programmed by the operator in the following manner: 1. Depress and hold the button at the lower left corner of the display screen while turning the generator ON.

  • Page 20: Multi-Function Buttons

    MPX 525/625 Generator Revision A Operating Manual Multi-function Buttons Each multi-function button is defined on the central display screen. An undefined button will have no effect when pressed. Pressing a defined button will either toggle through a choice of options or allow a technique factor to be modified by the increment or decrement buttons.

  • Page 21: Aec Mode

    (For exposure procedures see Prep and Expose.) AEC MODE The Universal Automatic Exposure Control, if installed, can be activated by pressing the <AEC> mode button. When you select AEC, the following parameters are not displayed: •...

  • Page 22: Daily X-Ray Tube Seasoning Procedure

    MPX 525/625 Generator Revision A Operating Manual Daily X-Ray Tube Seasoning Procedure Follow the manufacturer’s tube warm up procedure to extend the useful life of the x-ray tube. It is important to slowly warm the tube target before using it if the unit has been idle for three hours or longer.
  • Page 23 MPX 525/625 Generator Revision A Operating Manual AEC Error Messages: If an AEC exposure terminates improperly, one of two faults will be displayed: AEC Exposure Termination Faults Exposure was terminated by the AEC mAs backup circuitry, possibly a problem requiring service. Check to make sure that the selected backup mAs has been properly set to a value two to three times Backup mAs Termination...

  • Page 24: Specifications

    MPX 525/625 Generator Revision A Operating Manual Specifications GENERAL 208 VAC, 60 Hz., single phase, maximum momentary current draw: 366 Amps 240 VAC, 60 Hz., single phase, maximum Input Power momentary current draw: 293 Amps (Note: MPX 625 operates only on three phase) 208 to 480 VAC, 60 Hz, three phase (consult pre installation chapter for specific currents...

  • Page 25: Aec

    MPX 525/625 Generator Revision A Operating Manual POWER MODULE Power Rating 30 kilowatts or 40 kilowatts Type High Frequency switch mode, Microprocessor Controlled Kilovolt Range 40-125 kV Maximum mAs 500 or 600 Minimum mAs Maximum mA 500 or 600 Focal Spot Selection Operator Selectable Independent of Techniques (within Tube Limits) OPERATOR CONSOLE...

  • Page 26: Compatibility Listing

    MPX 525/625 Generator Revision A Operating Manual 72-86 8 inches (20.32 cm) .2 OD (Optical Density) 90-125 10 inches (25.4 cm) .25 OD (Optical Density) Operator selectable Default Termination Screen 1: - 200 Screen/film speed-factory preset Screen 2: - 400 5 calibration points: - 40, 56,72,90,125 kV kV Compensation 36 to 72 inches.

  • Page 27: System Weights And Dimensions

    PX-1429 - 0.6 X 1.2 PX-1436 - 0.6 X 1.2 Comet DX39H - 0.6 X 1.5 Consult Del Medical Imaging technical support for tubes that are not listed. Universal Model 110-0085G6 Automatic Exposure Control: SYSTEM WEIGHTS AND DIMENSIONS Component Weight Control Console (with floor stand) 30 lbs.
  • Page 28 MPX 525/625 Generator Revision A Operating Manual 17.5'' 444 mm 28" 711mm 19.5” 495mm 27'' 686mm Figure 40 – Rack Cabinet Dimensions © 7/5/2005 Page 20 2005 Del Medical Imaging Corporation...
  • Page 29 MPX 525/625 Generator Revision A Operating Manual 26" 660mm 26" 660mm 9.5" 12" 241mm 305mm Figure 41 – Rack Cabinet Center of Gravity 4.0" 101.6mm 2.75" 70mm Ø .281" (4) Ø 7.14mm (4) Control Console Wall Bracket Mounting Hole Dimensions ©...

  • Page 30: D.h.h.s. Compliance

    28 cm Pedestal Dimensions D.H.H.S. COMPLIANCE The UNIVERSAL MPX 525/625 High Frequency x-ray generator and its associated accessories are certified components conforming to all applicable radiation performance standards as outlined by the Food and Drug Administration, Code of Federal Regulations, Title 21, Subchapter J, at the time of manufacture.

  • Page 31: User Service And Maintenance

    MPX 525/625 Generator Revision A Operating Manual USER SERVICE AND MAINTENANCE Cleanliness is a fundamental rule in maintaining equipment. At least once a month, external metallic surfaces should be wiped to remove dust build-up or any other foreign material that may have accumulated. Enameled metal surfaces should be cleaned using a clean cloth slightly moistened in clean water.

  • Page 32: X-Ray Generator Maintenance

    MPX 525/625 Generator Revision A Operating Manual Caution: Certain tests require the production of X-rays. Field personnel should take precautions to ensure their personal safety and the safety of others in close proximity. Minimum precautions are as follows: a. Wear lead aprons b.

  • Page 33: Pre-Installation

    MPX 525/625 Generator Revision A Pre-Installation PRE-INSTALLATION Pre-Installation Planning WIRING REQUIREMENTS Caution: Generator performance will be impaired if additional circuitry is powered by the same incoming line. There are no accessory power provisions within the generator. Attempts to attach accessory items such as wall holders, collimator, tubestands or table power sources to this generator will damage circuitry.

  • Page 34: Identification Of Incoming Line

    MPX 525/625 Generator Revision A Pre-Installation NOTE: The minimum wire sizes listed above have been selected for the maximum wire resistance allowed at maximum momentary full load current. To meet National Electric Code Specifications, you must select a wire type having an amperage rating of at least 50% of the generator’s peak current demand.

  • Page 35: Grounding

    MPX 525/625 Generator Revision A Pre-Installation Grounding A separate #6 AWG wire to earth ground must be provided. Follow guidelines established by the National Electrical Code. Single Phase Installations (MPX-525 Only) Single phase versions of the MPX-525 may be operated on the following incoming line voltages only: 208 or 240 VAC, single phase, with one safety ground.
  • Page 36 MPX 525/625 Generator Revision A Pre-Installation DISTRIBUTION TRANSFORMER CUSTOMER MAINS DISCONNECT SUPPLIED SWITCH AND FUSES INPUT WIRING 2 AC CONDUCTORS AND 1 GROUND (208 VAC CONFIGURATION SHOWN) SINGLE PHASE LINE MATCHING XFMR #636-0021P2 CABLE CABLE #126-0211G1 #126-0214G2 2 COND. 16 AWG 3 COND.

  • Page 37: Making Connections (Single Phase)

    MPX 525/625 Generator Revision A Pre-Installation Making Connections (Single Phase) CONNECTING 208 VAC SINGLE-PHASE POWER (636-0021P2) TRANSFORMER Tools Required: • Pliers • Electrical Tape • Ratchet Wrench • 12” Socket Extension • 7/16” Socket • ½ “ Socket • Diagonal Cutters (Side Cutters) •...
  • Page 38 MPX 525/625 Generator Revision A Pre-Installation 3. Unscrew four inline-transformer mounting bolts and washers (1) and save for later use. Figure 2. Transformer Mounting Screws 4. Place in-line transformer (1 in Fig. 3) in position shown and secure in place with four bolts and washers (2) removed in step 3. 2 (x4) Figure 3.
  • Page 39 MPX 525/625 Generator Revision A Pre-Installation 5. Remove main cable (P/N 126-0214G2) from in-line transformer kit. Note that the wires on one end of the cable are longer than on the other end. 6. Loosen two stress relief clamp screws (1 Fig. 4). 7.
  • Page 40 MPX 525/625 Generator Revision A Pre-Installation Figure 6. Proper Cable Position 9. Remove secondary cable (P/N 126-0211G1) from in-line transformer kit. Note that the wires on one end of the cable are longer than the other end. 10. Loosen two stress relief clamp screws (1 Fig. 7). 11.
  • Page 41 MPX 525/625 Generator Revision A Pre-Installation Warning: Make sure that main power source disconnect is turned off and tagged “Machine is Being Serviced” before doing the following steps. You may get fatally shocked if you do not. 13. Turn off main power disconnect switch for generator’s outside power source.
  • Page 42 MPX 525/625 Generator Revision A Pre-Installation 16. Loosen two stress relief clamp screws (1 Fig. 9). 17. Insert the end of the main power cable (2) into the stress relief clamp and into the generator cabinet until there is enough wire slack inside the cabinet for the cable’s ground wire to reach the ground stud on the cabinet’s floor as shown in Figure 10.
  • Page 43 MPX 525/625 Generator Revision A Pre-Installation 19. Unscrew two rear cover screws (1 in Fig. 11) and remove rear cover (2). Figure 11. Rear Cover 20. Loosen two stress relief clamp screws (1 Fig. 12). 21. Insert the end of the main cable (2) (P/N 126-0214G2) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 12.
  • Page 44 MPX 525/625 Generator Revision A Pre-Installation 25. Loosen two stress relief clamp screws (1 Fig. 13). 26. Insert the end of the secondary cable (2) (P/N 126-0211G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 13.
  • Page 45 MPX 525/625 Generator Revision A Pre-Installation 30. Connect one of incoming 208 VAC power lines to lead #1 on in-line transformer with Burndy connector as shown in Figure 14 below. Do not wrap connection with tape yet. 31. Connect other incoming 208 VAC power line to lead #2 on in-line transformer with Burndy connector as shown in Figure 14 below.

  • Page 46: Making Connections (Single Phase)

    MPX 525/625 Generator Revision A Pre-Installation Making Connections (Single Phase) CONNECTING 240 VAC SINGLE-PHASE POWER (636-0021P2) TRANSFORMER Tools Required: • Pliers • Electrical Tape • Ratchet Wrench • 12” Socket Extension • 7/16” Socket • ½ “ Socket • Diagonal Cutters (Side Cutters) •...
  • Page 47 MPX 525/625 Generator Revision A Pre-Installation 3. Unscrew four inline-transformer mounting bolts and washers (1) and save for later use. Figure 2. Transformer Mounting Screws 4. Place in-line transformer (1 in Fig. 3) in position shown and secure in place with four bolts and washers (2) removed in step 3. 2 (x4) Figure 3.
  • Page 48 MPX 525/625 Generator Revision A Pre-Installation 5. Remove main cable (P/N 126-0214G2) from in-line transformer kit. Note that the wires on one end of the cable are longer than on the other end. 6. Loosen two stress relief clamp screws (1 Fig. 4). 7.
  • Page 49 MPX 525/625 Generator Revision A Pre-Installation Figure 6. Proper Cable Position 9. Remove secondary cable (P/N 126-0211G1) from in-line transformer kit. Note that the wires on one end of the cable are longer than the other end. 10. Loosen two stress relief clamp screws (1 Fig. 7). 11.
  • Page 50 MPX 525/625 Generator Revision A Pre-Installation Warning: Make sure that main power source disconnect is turned off and tagged “Machine is Being Serviced” before doing the following steps. You may get fatally shocked if you do not. 13. Turn off main power disconnect switch for generator’s outside power source.
  • Page 51 MPX 525/625 Generator Revision A Pre-Installation 16. Loosen two stress relief clamp screws (1 Fig. 9). 17. Insert the end of the main power cable (2) into the stress relief clamp and into the generator cabinet until there is enough wire slack inside the cabinet for the cable’s ground wire to reach the ground stud on the cabinet’s floor as shown in Figure 10.
  • Page 52 MPX 525/625 Generator Revision A Pre-Installation 19. Unscrew two rear cover screws (1 in Fig. 11) and remove rear cover (2). Figure 11. Rear Cover 20. Loosen two stress relief clamp screws (1 Fig. 11). 21. Insert the end of the main cable (2) (P/N 126-0214G2) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 12.
  • Page 53 MPX 525/625 Generator Revision A Pre-Installation 25. Loosen two stress relief clamp screws (1 Fig. 13). 26. Insert the end of the secondary cable (2) (P/N 126-0211G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 13.
  • Page 54 MPX 525/625 Generator Revision A Pre-Installation 30. Connect one of incoming incoming 240 VAC power lines to lead # 1 on in- line transformer with Burndy connector as shown in Figure 14 below. Do not wrap connection with tape yet. 31.

  • Page 55: Three Phase Installations

    MPX 525/625 Generator Revision A Pre-Installation Three Phase Installations All 30 kW, three phase versions of the MPX-525 generators may be operated on the following incoming line voltages: 208, 230, 240, 380, or 480 VAC, three phase, with one safety ground and no neutral.
  • Page 56 MPX 525/625 Generator Revision A Pre-Installation it 636-5010P1 Connection Information for K Brackets Optional #636-5010P1 - Three Phase Line Matching Autoformer for 30 kW & 40 kW Applications Do Not Use for 40kW 208VAC Applications 3-Phase Tap Voltages Tap #1 Tap #2 Tap #3 Tap #4...
  • Page 57 MPX 525/625 Generator Revision A Pre-Installation Schematic - #636-5010P1 – Three Phase Line Matching Transformer Do Not Use for 40kW 208VAC Applications © 7/5/2005 Page 49 2005 Del Medical Imaging Corporation...
  • Page 58 MPX 525/625 Generator Revision A Pre-Installation Connection Information for Kit 636-5010P1 DISTRIBUTION TRANSFORMER DISCONNECT AND FUSES CUSTOMER PROVIDED WIRING: 3 AC CONDUCTORS AND 1 GROUND LINE MATCHING TRANSFORMER 636-5010P1 CABLE CABLE #126-0211G1 #126-0208G1 2 COND. #16 AWG 4 COND. 10 AWG POWER MODULE THREE PHASE LINE MATCHING CONFIGURATION Interconnection Diagram –...
  • Page 59 MPX 525/625 Generator Revision A Pre-Installation it 636-0070P1 – Connection Information for K For 40kW 208 V Applications only #636-0070P1 - Three Phase Line Matching Autoformer For 40 kW 208V Applications Only 3-Phase Tap Voltages Tap #1 Tap #2 Tap #3 Tap #4 Tap #5 Tap #6...
  • Page 60 MPX 525/625 Generator Revision A Pre-Installation it 636-0070P1 – Connection Information for K For 40kW 208 V Applications only Single Phase Output to 280 V 280 V 260 V 260 V 240 V 240 V 208 V 208 V 190 V Three Phase 190 V Three Phase...
  • Page 61 MPX 525/625 Generator Revision A Pre-Installation it 636-0070P1 – Connection Information for K For 40kW 208 V Applications only DISTRIBUTION TRANSFORMER DISCONNECT AND FUSES CUSTOMER PROVIDED WIRING: 3 AC CONDUCTORS AND 1 GROUND LINE MATCHING TRANSFORMER 636-0070P1 CABLE CABLE #126-0211G1 #126-0208G1 2 COND.

  • Page 62: Connecting 208 Vac Three Phase Power (30 Kw Only) (636-5010P1 Transformer)

    MPX 525/625 Generator Revision A Pre-Installation CONNECTING 208 VAC THREE PHASE POWER (30 kW ONLY) (636-5010P1 TRANSFORMER) Note This procedure is NOT for 208 VAC 40 kW applications. That procedure starts on page 81. Tools Required: • Ratchet Wrench • 12” Socket Extension •...
  • Page 63 MPX 525/625 Generator Revision A Pre-Installation 3. Unscrew two high-tension transformer bracket nuts (1 in Fig. 2) and remove bracket (2). 4. Slide transformer (3) all the way to the left. 5. Unscrew four inline-transformer mounting bolts and washers (4) and save for later use.
  • Page 64 MPX 525/625 Generator Revision A Pre-Installation 6. Place in-line transformer (1 in Fig. 3) in position shown and secure in place with four bolts and washers (2) removed in step 5. 7. Reposition high-tension transformer (3) and secure in place with bracket (4) and two bolts.
  • Page 65 MPX 525/625 Generator Revision A Pre-Installation Note In the following steps, you have to remove select insulators (1 in Fig. 4) and connect Burndy connectors (2) to select tabs of the in-line transformer. Make sure that each Burndy connector is connected to each tab exactly as shown in Figure 4.
  • Page 66 MPX 525/625 Generator Revision A Pre-Installation 10. Remove main cable (P/N 126-0208G1) from in-line transformer kit. This cable has four wires. Note that the wires on one end of the cable are longer than the other end. 11. Loosen two stress relief clamp screws (1 Fig. 6). 12.
  • Page 67 MPX 525/625 Generator Revision A Pre-Installation Figure 7. Proper Cable Position 14. Connect red, white and black wires (1,2 & 3 in Fig. 8) to 280 VAC Burndies on transformer as shown below . It does not matter which color wire goes in which position.
  • Page 68 MPX 525/625 Generator Revision A Pre-Installation 16. Remove secondary cable (P/N 126-0211G1) from in-line transformer kit. This cable has two wires. Note that the wires on one end of the cable are longer than the other end. 17. Loosen two stress relief clamp screws (1 Fig. 9). 18.
  • Page 69 MPX 525/625 Generator Revision A Pre-Installation 20. Connect white and black wires (1 & 2 in Fig. 10) to 240 VAC Burndies on transformer as shown below. It does not matter which color wire goes in which position. Securely wrap each Burndy connection with electrical tape. 1 &...
  • Page 70 MPX 525/625 Generator Revision A Pre-Installation 21. Unscrew two rear cover screws (1 in Fig. 11) and remove rear cover (2). Figure 11. Rear Cover 22. Loosen two stress relief clamp screws (1 Fig. 12). 23. Insert the end of the main cable (2) (P/N 126-0208G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 12.
  • Page 71 MPX 525/625 Generator Revision A Pre-Installation 27. Loosen two stress relief clamp screws (1 Fig. 13). 28. Insert the end of the secondary cable (2) (P/N 126-0211G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 13.
  • Page 72 MPX 525/625 Generator Revision A Pre-Installation Warning: Make sure that main power source disconnect is turned off and tagged “Machine is Being Serviced” before doing the following steps. You may get fatally shocked if you do not. 37. Turn off main power disconnect switch for generator’s outside power source.
  • Page 73 MPX 525/625 Generator Revision A Pre-Installation 33. Loosen two stress relief clamp screws (1 Fig. 14). 34. Insert the end of the main power cable (2) into the stress relief clamp and into the generator cabinet until there is enough wire slack inside the cabinet for the cable wires to reach all tabs on the transformer.
  • Page 74 MPX 525/625 Generator Revision A Pre-Installation 38. Attach shield (1 in Fig. 15) with two bolts and nuts (2). Figure 15. Shield Installation (Some Parts Shown Removed for Clarity) Procedure is Complete. © 7/5/2005 Page 66 2005 Del Medical Imaging Corporation...

  • Page 75: Connecting 480 Vac Three Phase Power (30 Kw & 40Kw) (636-5010P1 Transformer)

    MPX 525/625 Generator Revision A Pre-Installation CONNECTING 480 VAC THREE PHASE POWER (30 kW & 40KW) (636-5010P1 TRANSFORMER) Note This procedure is NOT for 208 VAC 40 kW applications. That procedure starts on page 81. Tools Required: • Ratchet Wrench •...
  • Page 76 MPX 525/625 Generator Revision A Pre-Installation 3. Unscrew two high-tension transformer bracket nuts (1 in Fig. 2) and remove bracket (2). 4. Slide transformer (3) all the way to the left. 5. Unscrew four inline-transformer mounting bolts and washers (4) and save for later use.
  • Page 77 MPX 525/625 Generator Revision A Pre-Installation 6. Place in-line transformer (1 in Fig. 3) in position shown and secure in place with four bolts and washers (2) removed in step 5. 7. Reposition high-tension transformer (3) and secure in place with bracket (4) and two bolts.
  • Page 78 MPX 525/625 Generator Revision A Pre-Installation Note In the following steps, you have to remove select insulators (1 in Fig. 4) and connect Burndy connectors (2) to select tabs of the in-line transformer. Make sure that each Burndy connector is connected to each tab exactly as shown in Figure 4.
  • Page 79 MPX 525/625 Generator Revision A Pre-Installation 10. Remove main cable (P/N 126-0208G1) from in-line transformer kit. This cable has four wires. Note that the wires on one end of the cable are longer than the other end. 11. Loosen two stress relief clamp screws (1 Fig. 6). 12.
  • Page 80 MPX 525/625 Generator Revision A Pre-Installation Figure 7. Proper Cable Position 14. Connect red, white and black wires to (1,2 & 3 in Fig. 8) 280 VAC Burndies on transformer as shown below. It does not matter which color wire goes in which position.
  • Page 81 MPX 525/625 Generator Revision A Pre-Installation 16. Remove secondary cable (P/N 126-0211G1) from in-line transformer kit. This cable has two wires. Note that the wires on one end of the cable are longer than the other end. 17. Loosen two stress relief clamp screws (1 Fig. 9). 18.
  • Page 82 MPX 525/625 Generator Revision A Pre-Installation 20. Connect white and black wires (1 & 2 in Fig. 10) to 240 VAC Burndies on transformer as shown below. It does not matter which color wire goes in which position. Securely wrap each Burndy connection with electrical tape. 1 &...
  • Page 83 MPX 525/625 Generator Revision A Pre-Installation 21. Unscrew two rear cover screws (1 in Fig. 11) and remove rear cover (2). Figure 11. Rear Cover 22. Loosen two stress relief clamp screws (1 Fig. 12). 23. Insert the end of the main cable (2) (P/N 126-0208G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 12.
  • Page 84 MPX 525/625 Generator Revision A Pre-Installation 27. Loosen two stress relief clamp screws (1 Fig. 13). 28. Insert the end of the secondary cable (2) (P/N 126-0211G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 13.
  • Page 85 MPX 525/625 Generator Revision A Pre-Installation Warning: Make sure that main power source disconnect is turned off and tagged “Machine is Being Serviced” before doing the following steps. You may get fatally shocked if you do not. 32. Turn off main power disconnect switch to generator from local source. 33.
  • Page 86 MPX 525/625 Generator Revision A Pre-Installation 36. Loosen two stress relief clamp screws (1 Fig. 14). 37. Insert the end of the main power cable into the stress relief clamp and into the generator cabinet until there is enough wire slack inside the cabinet for the cable wires to reach all tabs on the transformer.
  • Page 87 MPX 525/625 Generator Revision A Pre-Installation 39. Connect red, white and black wires (1,2 & 3 in Fig. 15) from main cable to 480 VAC Burndies on in-line transformer as shown below. It does not matter which color wire goes in which position. Securely wrap each Burndy connection with electrical tape.
  • Page 88 MPX 525/625 Generator Revision A Pre-Installation 41. Attach shield (1 in Fig. 16) with two bolts and nuts (2). Figure 16. Shield Installation (Some Parts Shown Removed for Clarity) Procedure is Complete. © 7/5/2005 Page 80 2005 Del Medical Imaging Corporation...

  • Page 89: Connecting 208 Vac Three Phase Power (40 Kw Only) (636-0070P1 Transformer)

    MPX 525/625 Generator Revision A Pre-Installation CONNECTING 208 VAC THREE PHASE POWER (40 KW ONLY) (636-0070P1 TRANSFORMER) Note This procedure is NOT for 208 VAC 30 kW applications. That procedure starts on page 54. Tools Required: • Electrical Tape • Pliers •...
  • Page 90 MPX 525/625 Generator Revision A Pre-Installation 3. Unscrew four inline-transformer mounting bolts and washers (1) and save for later use. Figure 2. Transformer Mounting Screws 4. Place in-line transformer (1 in Fig. 3) in position shown and secure in place with four bolts and washers (2) removed in step 3.
  • Page 91 MPX 525/625 Generator Revision A Pre-Installation 5. Remove main cable (P/N 126-0208G1) from in-line transformer kit. This cable has four wires. Note that the wires on one end of the cable are longer than the other end. 6. Loosen two stress relief clamp screws (1 Fig. 5). 7.
  • Page 92 MPX 525/625 Generator Revision A Pre-Installation Figure 7. Proper Cable Position 9. Remove secondary cable (P/N 126-0211G1) from in-line transformer kit. Note that the wires on one end of the cable are longer than the other end. 10. Loosen two stress relief clamp screws (1 Fig. 8). 11.
  • Page 93 MPX 525/625 Generator Revision A Pre-Installation 13. Unscrew two rear cover screws (1 in Fig. 9) and remove rear cover (2). Figure 9. Rear Cover 14. Loosen two stress relief clamp screws (1 Fig. 10). 15. Insert the end of the main cable (2) (P/N 126-0208G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 10.
  • Page 94 MPX 525/625 Generator Revision A Pre-Installation 19. Loosen two stress relief clamp screws (1 Fig. 11). 20. Insert the end of the secondary cable (2) (P/N 126-0211G1) into the stress relief clamp until the black insulation on the cable is within the stress relief clamp as shown in Figure 11.
  • Page 95 MPX 525/625 Generator Revision A Pre-Installation Warning: Make sure that main power source disconnect is turned off and tagged “Machine is Being Serviced” before doing the following steps. You may get fatally shocked if you do not. 24. Turn off main power disconnect switch for generator’s outside power source. 25.
  • Page 96 MPX 525/625 Generator Revision A Pre-Installation 27. Loosen two stress relief clamp screws (1 Fig. 13). 28. Insert the end of the main power cable (2) into the stress relief clamp and into the generator cabinet until there is enough wire slack inside the cabinet for the cable’s ground wire to reach the ground stud on the cabinet’s floor as shown in Figure 14.
  • Page 97 MPX 525/625 Generator Revision A Pre-Installation 30. Connect ground wire from cable (P/N 126-0208G1) to lug (1 in Fig. 15). Figure 15. Main Cable Ground © 7/5/2005 Page 89 2005 Del Medical Imaging Corporation...
  • Page 98 MPX 525/625 Generator Revision A Pre-Installation Connect red, white and black wires (1,2 & 3 in Fig. 16) from cable (P/N 126- 0208G1) to Tap wire #6 on all three coils of transformer with Burndy connectors as shown below. It does not matter which color wire goes in which position.
  • Page 99 MPX 525/625 Generator Revision A Pre-Installation 32. Connect black and white wires (1 & 2 in Fig. 17) from cable (P/N 126- 0211G1) to Tap wire #4 on any two coils of transformer with Burndy connectors as shown below. It does not matter which color wire goes in which position.
  • Page 100 MPX 525/625 Generator Revision A Pre-Installation 33. Connect ground wire from power cable to as shown below. Figure 18. Power Cable Ground Connect red, white and black wires (1,2 & 3 in Fig. 19) from power cable to Tap wire #3 on all three coils of transformer with Burndy connectors as shown below.
  • Page 101 MPX 525/625 Generator Revision A Pre-Installation 35. Thoroughly insulate unused tap wires on transformer with electrical tape. Procedure is Complete. © 7/5/2005 Page 93 2005 Del Medical Imaging Corporation...
  • Page 102 MPX 525/625 Generator Revision A Pre-Installation Cable Index MAIN POWER AUX. POWER TABLE DISCONNECT DISCONNECT ELECTRIC WALL STAND LOCK SUPPLY LINE MATCH COLLIMATOR WALL TRANSFORMER POWER RECEPTOR / SUPPLY BUCKY TABLE RECEPTOR / BUCKY POWER MODULE TUBE 1 COLLIMATOR WALL ION AEC CHASSIS CHAMBER TABLE ION...

  • Page 103: Cable Index

    MPX 525/625 Generator Revision A Installation Cable Index Cable # Description Length Part Number Main Power (not supplied) High Power Line Match to Power 8 feet (2.4 m) 126-0214G2 Module – Single Phase High Power Line Match to Power 8 feet (2.4 m) 126-0208G2 Module –...
  • Page 104 MPX 525/625 Generator Revision A Installation Side View Front View Rear View 15.5” 394mm 17.61” 27.2” 691mm 4.4” 447mm 112mm 28.45” 23.5” 723mm 597mm 16.5” 419mm Figure 42 – Cable Access Holes 19.5” 495mm 25.11” 638mm Figure 43 – Floor Attachment Pattern ©...

  • Page 105: Modifications

    MPX 525/625 Generator Revision A Installation Modifications AEC Chassis Modifications Once mounted in the rack cabinet, the rear mounting panel and the front box cover of the AEC device will not be needed. The AEC control box assembly will mount directly to the rear of the cabinet wall.

  • Page 106: Installation

    There are no accessory power provisions within the generator. Attempts to attach accessory items such as collimator or table power sources to this generator will damage circuitry. Note: The UNIVERSAL MPX 525/625 X-ray generator requires a dedicated input line. © 7/5/2005...

  • Page 107: Generator Interconnections

    MPX 525/625 Generator Revision A Installation GENERATOR INTERCONNECTIONS Power Module Exposure Interlocks Each interlock switch must be an isolated set of contacts which closes in the exposure “Go” condition. TB1 - 1 to Door Interlock TB1 - 2 to Collimator Interlock TB1 - 3 to Common If no door or collimator interlocks are present, wire jumpers must be added to TB1 to allow an exposure.

  • Page 108: Plug Connections To Power Module

    MPX 525/625 Generator Revision A Installation Plug Connections to Power Module J13 – Connects to operator console CPU board at J5. Stator Connections TB3 - 1 Phase (08) TB3 - 2 Main (07) TB3 - 3 Common (09) TB3 - 4 Thermal Switch * TB3 - 5 Thermal Switch Common * *An isolated, normally closed set of contacts, mounted on the tube housing, which opens if the housing is beyond normal operating temperatures.
  • Page 109 MPX 525/625 Generator Revision A Installation Table Image Receptor Connections Progeny L/F 8000 Connection Signal L/F 8000 Villa (older models) L/F 9000 117VAC Table Select TB5-1 (Switched) TB5-2 Table Feedback TB5-3 117 VAC TB5-4 Signal GND TB5-5 117 VAC Return Chassis Chassis GND Chassis GND...

  • Page 110: Service Adjustments

    MPX 525/625 Generator Revision A Service Adjustments SERVICE ADJUSTMENTS Start Up, Operational Check and Calibration Procedure GENERAL NOTES This procedure is to be followed: 1. After initial installation of the MPX 525/625 2. Before beginning calibration of the MPX 525/625 3.
  • Page 111 MPX 525/625 Generator Revision A Service Adjustments Warning: The following procedures will produce x-rays. Operating personnel should take precautions to ensure their personal safety and the safety of others in close proximity. Minimum precautions are as follows: a) Wear lead aprons b) Personnel remaining in the X-ray room during exposure should be behind a lead shield c) Minimize radiation scatter through doorways, walls and floor...

  • Page 112: Component Identification

    MPX 525/625 Generator Revision A Service Adjustments COMPONENT IDENTIFICATION Pictorial Diagrams Diagram Figure Number Bottom Chassis Assembly Power Module Power Module Front Panel Power Module Top View Power Module Inner Rear Panel Inverter Power Supply Board Mother Board I/O Board Relay Control Board kV Regulator Logic Board...
  • Page 113 MPX 525/625 Generator Revision A Service Adjustments Rotor Capacitor (C7) Line Contactor (M1) Autotransformer Inverter Power (T1) Supply Capacitors DP1, DP2, DP3 Inverter Power Supply Diode Blocks C1 (Top) Operator Console Power Supply C2 (Bottom) Transformer (T2) Figure 49 - Bottom Chassis Assembly ©...
  • Page 114 MPX 525/625 Generator Revision A Service Adjustments Figure 50 - Power Module © 7/5/2005 Page 106 2005 Del Medical Imaging Corporation...
  • Page 115 MPX 525/625 Generator Revision A Service Adjustments Figure 51 - Power Module Front Panel © 7/5/2005 Page 107 2005 Del Medical Imaging Corporation...
  • Page 116 MPX 525/625 Generator Revision A Service Adjustments Inverter Fuse (F1) Right Side I/O Board Power Supply Rear Bottom Front Mother Panel Panel Panel Board 1. – Auxilliary 2. – mA/Rotor 3. – mAs Regulator 4. – Data 5. – kV Regulator 6.
  • Page 117 MPX 525/625 Generator Revision A Service Adjustments Figure 53 - Power Module Inner Rear Panel © 7/5/2005 Page 109 2005 Del Medical Imaging Corporation...
  • Page 118 MPX 525/625 Generator Revision A Service Adjustments Figure 54 – Inverter Assembly © 7/5/2005 Page 110 2005 Del Medical Imaging Corporation...
  • Page 119 MPX 525/625 Generator Revision A Service Adjustments Connector To I/O Board TP1 Filament Voltage Connector To Mother Board Figure 55 - Power Supply Board © 7/5/2005 Page 111 2005 Del Medical Imaging Corporation...
  • Page 120 MPX 525/625 Generator Revision A Service Adjustments Figure 56 - Mother Board © 7/5/2005 Page 112 2005 Del Medical Imaging Corporation...
  • Page 121 MPX 525/625 Generator Revision A Service Adjustments Figure 57 - I/O Board © 7/5/2005 Page 113 2005 Del Medical Imaging Corporation...
  • Page 122 MPX 525/625 Generator Revision A Service Adjustments Figure 58 - Relay Control Board © 7/5/2005 Page 114 2005 Del Medical Imaging Corporation...
  • Page 123 MPX 525/625 Generator Revision A Service Adjustments GND Test Point CR20 – Exposure – SCR Hold Time SCR Drive 1 SCR Drive 2 +25 VDC R77 – kV TP1 – kV Adjustment Reference (Top of board) Figure 59 - kV Regulator ©...
  • Page 124 MPX 525/625 Generator Revision A Service Adjustments CR4 – Wall Bucky Feedback CR1 – kV Fault – Table Bucky Feedback CR2 – Filament Fault kV Above 75% (Low) from kV Board (R50&R51 junction) CR9 – Ready Output to Control Rotor OK (Low) (R26&R27 CR8 –...
  • Page 125 MPX 525/625 Generator Revision A Service Adjustments (Top of board) GND Test Point Exposure mA IN (TP5) Start (high) (TP1) mAs Adjust (Short time) mAs Adjust mAs Stop (high) (TP2) mAs Pulses (TP3) Serial Data (TP4) Figure 61 – mAs Regulator Board ©...
  • Page 126 MPX 525/625 Generator Revision A Service Adjustments GND Test Point Figure 62 - Data Board © 7/5/2005 Page 118 2005 Del Medical Imaging Corporation...
  • Page 127 MPX 525/625 Generator Revision A Service Adjustments Top of Board Boost / Run Time Adjust (R29) U23 pin 10 – Filament Protection Adjustment test point mA Fault Adjust (R57) (Filament Protection) Tube 1 Small Spot Preheat (R70) mA Adjust (R63) Tube 2 Small Spot Preheat (R71)

  • Page 128: Adjustment Pot Identifications

    MPX 525/625 Generator Revision A Service Adjustments ADJUSTMENT POT IDENTIFICATIONS GENERATOR START UP OPERATIONAL TESTS AND INSTALLATION SET-UP This procedure will verify correct electrical operation and lead the service engineer through the generator calibration. This procedure is not intended to limit the service engineer's final assembly inspections.

  • Page 129: Test Equipment Required

    MPX 525/625 Generator Revision A Service Adjustments Warning: Lethal voltages are present on the large filter capacitors in this unit. Exercise extreme caution when working near the long copper bus bars attached to the six large capacitors in the base of the power module. Always verify with a dc voltmeter that the capacitors are discharged before attempting any service in this area.

  • Page 130: Inspection Of Power Module

    MPX 525/625 Generator Revision A Service Adjustments • Check tightness of high voltage cable locking rings Inspection of Power Module • Check that circuit boards are securely fastened in place and that board connectors are properly aligned • Check that all electrical components are mounted securely •...
  • Page 131 MPX 525/625 Generator Revision A Service Adjustments c. The +5 volt, +12 volt, and -12 volt LED's will light on the power module mother board 8. Connect the negative lead of a D.V.M. to the ground test point (TP12) on the mother board.

  • Page 132: Programming The Default System Configuration Menu

    MPX 525/625 Generator Revision A Service Adjustments 15. Set the generator as follows: a. Mode - 3 point b. kV - 70kV c. Time – 40 milliseconds d. Focal spot - Large focus 16. Set the control to change “mA”. There are three commutating relays located on the inner rear wall of the power module, two on the rear panel and K1 on the inverter assembly.
  • Page 133 MPX 525/625 Generator Revision A Service Adjustments The installer must program default system configuration in the following manner: 1. Depress and hold the second button from the lower left corner of the display screen while turning the generator ON. 2. Enter the Dealer Password, using the buttons above the display to highlight the characters, and by adjusting their numeric values with the rotational knob.

  • Page 134: X-Ray Tube Assemblies

    MPX 525/625 Generator Revision A Service Adjustments Note: If your desired tube is not on the tube list, contact Del Medical Imaging Technical Support for assistance. X-Ray Tube Assemblies RAD 8 - 1.0 X 2.0 Varian RAD 13 - 1.0 X 2.0 RAD 14 - 0.6 X 1.2 RAD 16 - 1.0 X 2.0 RAD 21 - 0.6 X 1.2...
  • Page 135 MPX 525/625 Generator Revision A Service Adjustments Perform User Default Screen setup 1. Depress and hold first key from left on lower side of display window and turn generator power ON. The console will now display the default user setup screen.

  • Page 136: Mpx X-Ray Calibration Procedure

    MPX 525/625 Generator Revision A Service Adjustments MPX X-Ray Calibration Procedure This procedure is to be followed upon initial installation of the MPX 525/625. Warning: The main SCR capacitor bank (bottom of power module) contains a very high charge even after power is turned off. The charge is a fatal shock hazard. After power has been disconnected from the system, either by turning the line disconnect or the control console switch off, allow a minimum of five minutes for capacitor bank to discharge.
  • Page 137 MPX 525/625 Generator Revision A Service Adjustments Connect a Dynalyzer™, equipped with a digital display unit, in-line with the anode and cathode high voltage cables, between the high voltage transformer and the x - ray tube. If you do not have a digital display unit for the Dynalyzer™, all measurements must be made with a storage oscilloscope, connected to the Dynalyzer™...

  • Page 138: Initial Test Exposure

    MPX 525/625 Generator Revision A Service Adjustments Initial Test Exposure Warning: Lethal voltages are present on the large filter capacitors in this unit. Exercise extreme caution when working near the long copper bus bars attached to the large capacitors in the base of the power module. Always verify with a DC voltmeter that the capacitors are discharged before even attempting any service in this area.

  • Page 139: Dynalyzer / Scope Setup

    MPX 525/625 Generator Revision A Service Adjustments during exposures, as dangerously high voltage can be present when there are improper connections. mAs measurements may also be made using the storage oscilloscope and calculating mAs as a product of tube current and time, as measured using the mA waveform.

  • Page 140: Calibrate Ma

    MPX 525/625 Generator Revision A Service Adjustments Calibrate mA 1. With power off, place the mA/Rotor Board on the extender card 2. Turn power on. Set generator as follows: 3 Point Mode 84 kV 300 mA Large Focal Spot 100 mSec Time 3.

  • Page 141: Initial Setting Of Preheat Pots

    MPX 525/625 Generator Revision A Service Adjustments Figure 64 – Proper 300 mA Waveform from Dynalyzer™ 4. Turn the X-ray generator OFF. Leave the mA/Rotor board in place on the extender board Initial Setting of Preheat Pots 5. Turn the generator ON 6.
  • Page 142 MPX 525/625 Generator Revision A Service Adjustments Figure 65 – Proper mA Wave shape Figure 66 – Preheat Adjustment Set Too High © 7/5/2005 Page 134 2005 Del Medical Imaging Corporation...

  • Page 143: Calibrate Mas

    MPX 525/625 Generator Revision A Service Adjustments Figure 67 – Preheat Adjustment Set Too Low 9. Set the generator as follows: 3 point Mode Focal Spot Small 84 kV 150 mA 100 mSec Time 10. Make exposure and adjust R70 on mA Rotor (124-0095G1) PWB for a flat waveform 11.

  • Page 144: Long Exposure Mas Calibration

    MPX 525/625 Generator Revision A Service Adjustments 300 mA 500 mSec Time Indicated 150 mAs 4. Make exposures and adjust R2 on the mAs (124-0145G1) PWB for a reading of 150 mAs (+ 1 mAs) on the Dynalyzer™ Long Exposure mAs Calibration 5.
  • Page 145 MPX 525/625 Generator Revision A Service Adjustments 3 point Mode Tube Focal Spot Large 200 mA 100 mSec Time 4. Connect channel 1 to the anode BNC output of the Dynalyzer™ 5. Connect channel 2 to the cathode BNC output of the Dynalyzer™ 6.

  • Page 146: Calibration Verification

    MPX 525/625 Generator Revision A Service Adjustments 9. Turn power OFF and remove the kV Regulator Board from the extender card. Replace the kV Regulator Board in its original position in the card cage Calibration Verification This step verifies that the previous calibrations have been properly performed and that the generator is functioning correctly.

  • Page 147: Alternate Calibration Procedure

    MPX 525/625 Generator Revision A Service Adjustments Focal Spot Small 84 kV 114 mAs 8. Make an exposure and verify that the kV and mA waveforms for the small focal spot are correct. The kV and mA waveforms should rise together and stabilize without any noticeable overshoots or undershoots.
  • Page 148 MPX 525/625 Generator Revision A Service Adjustments Warning: Observe proper radiation protection procedures because the following steps will produce x-ray emissions. 7. Select 250 mA and make an exposure. Observe the mA wave form on the oscilloscope. The waveform should achieve stabilization at +5 VDC. 8.
  • Page 149 MPX 525/625 Generator Revision A Service Adjustments Figure 69 – Proper mA Waveform (Typical @ 375 mA) Figure 70 – Preheat Set Too High © 7/5/2005 Page 141 2005 Del Medical Imaging Corporation...
  • Page 150 MPX 525/625 Generator Revision A Service Adjustments Figure 71 – Preheat Set Too Low 11. Switch to the small focal spot. 12. Make another exposure and observe the waveform. If necessary, adjust R70 (Small Focus Preheat) on the mA/Rotor Board for an overall flat waveform Note: After adjusting for a flat waveform at this technique, the mA amplitude of the small focus should be less than or equal to the amplitude of the large focus.

  • Page 151: Kv Calibration

    MPX 525/625 Generator Revision A Service Adjustments kV Calibration 1. With power off, place the kV regulator board on the extender card 2. Connect a scope (2 channels) to kV+ (TP11) and kV- (TP10) with respect to DC return (TP-12) on the motherboard. Scale 1V = 10 kV 3.

  • Page 152: Mas Adjustment - Alternate Method Without Dynalyzer

    MPX 525/625 Generator Revision A Service Adjustments mAs Adjustment - Alternate Method without Dynalyzer™ mAs has been pre-adjusted and verified at the factory. However, it may become necessary to test or adjust mAs in the field. Del Medical Imaging recommends using a Dynalyzer™...

  • Page 153: Ma Fault Calibration

    MPX 525/625 Generator Revision A Service Adjustments 9. Remove the mAs meter from the circuit and reconnect the “MA+” wire to its original position in the terminal strip on top of the high voltage transformer. Ensure that this connection is secure. 10.
  • Page 154 MPX 525/625 Generator Revision A Service Adjustments Filament Cable Resistance Settings © 7/5/2005 Page 146 2005 Del Medical Imaging Corporation...

  • Page 155: Additional Optional Inspections

    MPX 525/625 Generator Revision A Service Adjustments Additional Optional Inspections The following four calibrations are not normally required. Information is included in case they must be done. Calibrate High Tension Transformer Balance Connect Channel 2 of the scope to the Dynalyzer™ "C" BNC jack and connect Channel 1 of the scope to the Dynalyzer™...

  • Page 156: Boost Time Adjustment

    MPX 525/625 Generator Revision A Service Adjustments 5 V / Division Channel 1 Vertical Scale 20 µSec / Division Horizontal Scale Single sweep Mode Channel 1 Trigger Negative Polarity 4. Set up the generator as follows: 2 point Mode Large Focal Spot 80 kV 31 mAs...

  • Page 157: Aec Inspection And Calibration

    MPX 525/625 Generator Revision A Service Adjustments AEC Inspection and Calibration The AEC will be powered up by +/- 12 VDC from APR power module. AEC Cable Interconnections There are three cable connections (four with two ion chambers): 1. Generator Power Module to AEC Main chassis (power and signals) 2.

  • Page 158: Aec Communication Link Checkout

    MPX 525/625 Generator Revision A Service Adjustments Test Point 4 Test Point 3 Test Point 2 Ground Test Point 9 Test Point 6 Test Point 8 Test Point 7 Test Point 15 Figure 74 - Test Points AEC COMMUNICATION LINK CHECKOUT This test will verify the correct selection of modes of operation, fields, densities, and desired kilovolts between the controller and the AEC device.
  • Page 159 MPX 525/625 Generator Revision A Service Adjustments 1. With the power "OFF" place a jumper on the AEC device "Main AEC Board" between the ground lead and TP6 2. Turn the generator "ON", select Manual, then select AEC operation 3. Move through the selections on the chart below, verify that the proper LED's illuminate Control Selection LED on Main AEC Board...

  • Page 160: Aec Device Field Calibration Procedure

    MPX 525/625 Generator Revision A Service Adjustments kV Select LED 17 LED 18 LED 19 LED 20 LED 21 LED 22 LED 23 40 – 41 42 – 43 44 – 45 46 – 47 48 – 49 50 – 51 52 –...

  • Page 161: Calibration Procedure

    MPX 525/625 Generator Revision A Service Adjustments • Densitometer capable of measuring optical film densities from .5 to 2.5 +/- .05 • X-Ray film processor • Film and cassettes • Phantom - 10 pieces of 1" x 8" x 8" (2.54 cm x 20.32 cm x 20.32 cm) pieces acrylic OR flat bottom (no reinforcing bumps) plastic bucket to hold 12 inches (30.5 cm) of water •...

  • Page 162: Preliminary Gain Adjustments

    MPX 525/625 Generator Revision A Service Adjustments Figure 75 - Gain Adjustment Board Preliminary Gain Adjustments For the Table Image Receptor 1. Disconnect table ion chamber cable from main AEC board 2. Place a jumper from TP2 to TP15 (both on Main AEC Board) 3.

  • Page 163: Kv Compensation Adjustments

    MPX 525/625 Generator Revision A Service Adjustments kV Compensation Adjustments Note: If this system is not equipped with a Bucky, the Exposure Enable Signal must be jumpered. The Bucky must be selected for AEC operation. For Wall Bucky: TB4 pin 2 to pin 4. For Table Bucky: TB5 pin 2 to pin 4.
  • Page 164 MPX 525/625 Generator Revision A Service Adjustments 5. If the measured density is not 1.2 (+/- .05), divide 1.2 by the density measured on the film and multiply the quotient by the mAs of that exposure. This number is the first approximation of the required exposure mAs for 72 kV to obtain a density of 1.2.

  • Page 165: Secondary Gain Adjustments

    MPX 525/625 Generator Revision A Service Adjustments Secondary Gain Adjustments 1. Select the table image receptor, 72 kV, 55 mAs. Insert 6 inches (15.24 cm) of water (or plastic) into the field and collimator to within the attenuation material. Insert an empty cassette in the Bucky tray. Set S.I.D. to 40 inches (1 meter). Make an exposure.
  • Page 166 MPX 525/625 Generator Revision A Service Adjustments Figure 77 - Preamplifier Adjustment © 7/5/2005 Page 158 2005 Del Medical Imaging Corporation...
  • Page 167 MPX 525/625 Generator Revision A Service Adjustments Figure 78 - Part Identification © 7/5/2005 Page 159 2005 Del Medical Imaging Corporation...

  • Page 168: Schematics

    MPX 525/625 Generator Revision A Schematics SCHEMATICS APR Interconnect ......034-0071 S Small Filament Resistance ..034-5071 S Control CPU Board...... 124-5045 S Power Supply Board....124-0108 S Prep / Expose PCB...... 124-5046 S Relay Control Board ....124-0152 S Inverter ........
  • Page 172 PROPRIETARY NOTICE Del Medical Imaging Corp SONALERT This information contained herein is confidential and U1-13 LCD-RST proprietary information of Del Global Technologies Corp, C17 .1uF U4 74HC373 PALCE22V10(PLCC) its subsidiaries and affiliates ("Del") and is a trade 29F010 PLCC28-SOC secret of Del which shall not be disclosed to any third party /RS232-SEL CLK/I0 I/O0...
  • Page 176 PROPRIETARY NOTICE Del Medical Imaging Corp This information contained herein is confidential and proprietary information of Del Global Technologies Corp, its subsidiaries and affiliates ("Del") and is a trade secret of Del which shall not be disclosed to any third party or copied without the express prior consent of Del.
  • Page 188 5VDC 5VDC 5VDC 1000 U15F U15E U15D SERIAL DATA CLOCK U 16A SERIAL DATA 4093 0.001UF 3300 MPS2222 74C14 74C14 74C14 1N4148 U 14 74C164 74C164 MEMORY CLOCK U15C C 14 U16B U 16D 4093 4093 0.01UF 74C14 12VDC MYLAR 0.001UF 74C373 74C373...

  • Page 196: Troubleshooting Topics For The Mpx 525/625 Generator

    MPX 525/625 Generator Revision A Diagnostics DIAGNOSTICS Troubleshooting Topics for the MPX 525/625 Generator • No Ready Light • Ready Light is Active, but No Exposure Occurs • Consistent kV Fault • Intermittent kV Fault • Long Exposure Times with Light Films •...

  • Page 197: Ready Light Is Active, But No Exposure Occurs

    MPX 525/625 Generator Revision A Diagnostics 4. Check for correct connections for main, common, and phase wires 5. Check for presence of the rotor current sense DC voltages during boost (anodes of CR2 & CR3 on the mA / Rotor PCB) 6.

  • Page 198: Kv Faults

    MPX 525/625 Generator Revision A Diagnostics closed with a jumper wire. This jumps out the “Bucky in Motion” switch and enables the start of the exposure. Is the F1 fuse for the inverter DC supply open? Caution: Dangerously high voltages may be present on the filter capacitors after power to the generator is turned off.

  • Page 199: Category I - Consistent Kv Fault

    MPX 525/625 Generator Revision A Diagnostics If the anode or cathode feedback voltages go outside of the window value of 1.3 VDC to 7.0 VDC (representing 13 to 70 kV for either the anode or cathode) one of the comparators will be tripped. If either comparator is tripped during an exposure attempt, the fault condition is latched and cannot be cleared until the unit is turned off and back on again.
  • Page 200 MPX 525/625 Generator Revision A Diagnostics • a defective X-ray tube • high voltage cables • faulty high-tension transformer 1. Connect 2 channels of an oscilloscope to kV+/- to TP-12 on the motherboard 2. Make an exposure. Based on a voltage interpretation of 1V=10kV, the anode and cathode waveforms should be equal in amplitude.
  • Page 201 MPX 525/625 Generator Revision A Diagnostics Check for a shorted commutation capacitor 1. Turn off power to the generator and allow 5-10 minutes for the inverter capacitors to discharge. Verify with a voltmeter that 0 VDC is measured across the inverter capacitors as well as on the commutation capacitors.

  • Page 202: Category Ii - Intermittent Kv Fault

    MPX 525/625 Generator Revision A Diagnostics 2. Place the mA/Rotor card on an extender card 3. Check outgoing filament reference signal by connecting a voltmeter or oscilloscope at U23, pin 1 to ground 4. Turn ON generator and prep the unit. The voltage should be approximately 5 VDC.
  • Page 203 MPX 525/625 Generator Revision A Diagnostics 7. If the waveform is not flat, adjust R72 as necessary. See Figure 2, ”Example of Pre-heat Wave-forms” 8. Select the Small focal spot and make another exposure. Adjust R70 as necessary Figure 2: Example of Preheat Waveforms 9.
  • Page 204 MPX 525/625 Generator Revision A Diagnostics 1. Turn off power to the generator and allow the inverter capacitors to discharge for 5-10 minutes Verify with a voltmeter that 0 VDC is measured across the inverter filter capacitors. Caution: Dangerously high voltages are present on the inverter filter capacitors whenever power is applied to the generator.
  • Page 205 MPX 525/625 Generator Revision A Diagnostics 4. Turn generator on. Select 60 kV and 10 mAs. Make an exposure and measure the off time between pulses at the very beginning of the exposure. It should be 140 microseconds 5. If necessary, adjust R65 on the board Note: If you are not quite sure about how to perform this adjustment it may be better to simply replace the board.

  • Page 206: No Load Test

    MPX 525/625 Generator Revision A Diagnostics To eliminate the HV Cables and X-Ray tube as the problem, try a No Load Test, as described below. No Load Test 1. Turn power to the generator off 2. Remove F3 on Power Supply PCB 3.

  • Page 207: Long Exposure Times With Light Films

    MPX 525/625 Generator Revision A Diagnostics Additional Problems and their Possible Causes Symptom Possible Cause Corrective Action Incorrect Filament drive – Check DC supply to Low Tube Current switching transistors, as well as switching LONG EXPOSURE waveform TIMES WITH LIGHT Possible feedback or FILMS reference voltage errors...

  • Page 208: Theory Of Operation

    MPX 525/625 Generator Revision A Diagnostics Theory of Operation Communications scheme: (See illustration X1 for overview) The human-machine interface between the operator and the MPX 525/625 generator takes place at the operator’s console. The Console Display Board provides visible selection data to the operator through the Liquid Crystal Display.
  • Page 209 MPX 525/625 Generator Revision A Diagnostics Selection data for mAs, commutation capacitors, and AEC settings are streamed from the Data Board to the mAs Board (124-0145G1). AEC data is then streamed on through the mAs Board to the AEC Main Board. When an exposure is taking place, the mAs Board sends a stream of mAs pulses back up to the CPU Board in the Operator’s Console, which are used to provide an indication of the mAs of the last exposure.
  • Page 210 MPX 525/625 Generator Revision A Diagnostics The filament preheat reference voltage is sent to the Power Supply Board (124- 0108G1), where it is used to regulate the output of a feed-forward voltage regulator circuit, which provides the regulated DC filament voltage to the primary filament switching circuitry on the I/O Board.
  • Page 211 MPX 525/625 Generator Revision A Diagnostics mA feedback voltage is received from the mAs regulator board and used on this board to provide closed loop regulation of the actual tube current. Fault detection circuits on the kV Regulator and mA/Rotor boards are used to monitor the operation of the generator during the exposure and to send Fault signals to the Logic Board to stop the exposure if an error is detected.
  • Page 212 MPX 525/625 Generator Revision A Diagnostics On the kV Regulator Board, the feedback voltages are summed, filtered, and sent to a comparator that compares the feedback with the kV Reference voltage and is then used to gate the core frequency oscillator on or off, resulting in closed loop regulation of the high-voltage being delivered to the x-ray tube.
  • Page 213 MPX 525/625 Generator Revision A Diagnostics The mA/Rotor Board also has a filament protection circuit (U23C) to detect unusually high voltages coming from the filament power supply and to then initiate a filament fault signal that will disable the generator’s ability to generate an exposure. An additional circuit on the same board can be used to detect unusually long periods of filament operation at boost levels, and to initiate the same filament fault signal.
  • Page 214 MPX 525/625 Generator Revision A Diagnostics Inverter Power Supply © 7/5/2005 Page 179 2005 Del Medical Imaging Corporation...
  • Page 215 MPX 525/625 Generator Revision A Diagnostics Communications BOARD Illustration X1 © 7/5/2005 Page 180 2005 Del Medical Imaging Corporation...
  • Page 216 MPX 525/625 Generator Revision A Diagnostics Prep Functions Illustration X2 © 7/5/2005 Page 181 2005 Del Medical Imaging Corporation...
  • Page 217 MPX 525/625 Generator Revision A Diagnostics Exposure Functions Illustration X3 © 7/5/2005 Page 182 2005 Del Medical Imaging Corporation...
  • Page 218 MPX 525/625 Generator Revision A Diagnostics kilovoltage Control Illustration X4 © 7/5/2005 Page 183 2005 Del Medical Imaging Corporation...
  • Page 219 MPX 525/625 Generator Revision A Diagnostics Filament Control Illustration X5 © 7/5/2005 Page 184 2005 Del Medical Imaging Corporation...

  • Page 220: Renewal Parts

    MPX 525/625 Generator Revision A Renewal Parts RENEWAL PARTS MPX 525/625 CONTROL, POWER MODULE, AND AEC DEVICE DESCRIPTION PART NUMBER Three phase 240/480 volt line match transformer 636-5010P1 Three phase 208 volt line match transformer 636-0070P1 Single-phase line match transformer to power Module 126-0214G2 Cable (#6 AWG) Three-phase line match transformer to power Module...
  • Page 221 MPX 525/625 Generator Revision A Renewal Parts DESCRIPTION PART NUMBER Diode Block 621-0015P3 Inverter Capacitor 611-0029P5 Inverter Fuse 646-0041P1 Single Tube High Voltage Transformer 110-0028G2 Control to Power Module Cable 126-5174G1 Control to AEC Cable 126-5178G1 AEC to Power Module Cable 126-0204G2 Commutation Select Relay 645-0033P1...

  • Page 222: 110-0028G2 High Frequency Transformer

    MPX 525/625 Generator Revision A Renewal Parts 110-0028G2 HIGH FREQUENCY TRANSFORMER DESCRIPTION PART NUMBER Tank 114-0066G2 Diala Oil AX Dielectric Oil (One gallon) 4463-0102 Capacitor Board 124-0034G2 Rectifier 621-0017P1 High Tension Transformer 112-0098G1 Filament Transformer 112-0118G1 Spark Gap Board 124-0046G1 Vertical Board 124-0035G1 Voltage Divider Resistor (36 Meg Ohms)

  • Page 223: Periodic Maintenance

    MPX 525/625 Generator Revision A Periodic Maintenance PERIODIC MAINTENANCE General Notes The following routine maintenance should be performed 30 days after installation and semi-annually thereafter. This inspection must be carried out by trained service personnel familiar with the equipment and maintenance procedures. Warning: The main SCR capacitor bank (bottom of power module) contains a very high charge when power is applied.
  • Page 224 MPX 525/625 Generator Revision A Periodic Maintenance 9. Inspect electromechanical contactors and relays for pitting, poor contact, loose or missing parts. Replace if necessary 10. High Voltage Transformer • Check transformer oil level. Proper oil level should be within 1/4" below the bottom side of the cover.

  • Page 225: Preventive Maintenance Log

    MPX 525/625 Generator Revision A Periodic Maintenance Preventive Maintenance Log Date Performed Customer Discrepancies Noted and Performed Initial Corrective Action Taken © 7/5/2005 Page 190 2005 Del Medical Imaging Corporation...

  • Page 226: Maintenance Equipment Upgrade / Modification Log

    MPX 525/625 Generator Revision A Periodic Maintenance Maintenance Equipment Upgrade / Modification Log Date Performed Customer Upgrade / Modification Number or Performed Initial Description © 7/5/2005 Page 191 2005 Del Medical Imaging Corporation...

  • Page 227: Index

    MPX 525/625 Generator Revision A Index INDEX Adjustment Pot Identifications ................120 AEC ........................6, 17 cable interconnections ..................149 chassis modifications ..................97 communication link checkout ................150 control box ...................... 97 device field calibration procedure..............152 exposure termination faults ................15 inspection and calibration................
  • Page 228 MPX 525/625 Generator Revision A Index Data Board ......................118 Density ........................13 Diagnostics ......................161 Dimensions......................19 Electrical Grounding ....................2 Equipment safety ........................2 Exposure Interlocks ....................99 Fault indications ......................14 Features and Benefits ....................3 Filament Connections to High Tension Transformer ..........99 Floor Attachment Pattern..................
  • Page 229 MPX 525/625 Generator Revision A Index calibration......................143 compensation adjustments ................155 compensation circuit board ................. 155 regulator......................115 waveform ..................137, 143, 147 LINE MATCH TRANSFORMER ................97 Logic Board ......................116 calibration......................144 fault calibration ....................145 Rotor Board..................... 119 waveshape ....................133, 134 Maintenance ......................
  • Page 230 MPX 525/625 Generator Revision A Index module front panel ..................107 module inner rear panel .................. 109 module top view ....................108 on/off procedure ....................7 requirements ....................... 4 Power Module....................99, 106 Power Supply Board....................111 Preamplifier Adjustment ..................158 Preheat adjustment set too high................
  • Page 231 MPX 525/625 Generator Revision A Index Test Equipment Required................121, 128 Test Exposure ....................... 130 Test Points ......................150 Theory ........................173 Tube .......................... 2 Tube Seasoning Procedure ..................14 User Service and Maintenance................23 Wall Image Receptor ..................... 154 connections ..................... 100 Weights And Dimensions ..................

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