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TXR 325D Maintenance Manual

Standard frequency series generators
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MEDICAL SYSTEMS
Technical Publication
M-2008-7-15
Maintenance Manual
For Maintaining and Troubleshooting
STANDARD FREQUENCY SERIES GENERATORS
Contents: Models
TXR 325D
TXR 325M
TXR 425
TXR 525SFQ

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  • Page 1 MEDICAL SYSTEMS Technical Publication M-2008-7-15 Maintenance Manual For Maintaining and Troubleshooting STANDARD FREQUENCY SERIES GENERATORS Contents: Models TXR 325D TXR 325M TXR 425 TXR 525SFQ...
  • Page 3 ¡ IMPORTANTE ! ... Protección ante los rayos-X LOS EQUIPOS DE RAYOS-X SON PELIGROSOS PARA EL PACIENTE Y EL OPERADOR A MENOS QUE LAS MEDIDAS DE PROTECCION SEAN ESTRICTAMENTE OBSERVADAS Si el equipo de rayos-X no se usa adecuadamente, puede causar lesiones. Por este motivo, las instrucciones aquí...
  • Page 4 DECLARACION AMBIENTAL SOBRE LA VIDA UTIL DEL EQUIPO O SISTEMA Este equipo o sistema contiene componentes y materiales peligrosos para el medioambiente (tales como tarjetas de circuito impreso, componentes electrónicos, aceite dieléctrico usado, plomo, baterías, etc), los cuales se consideran y son residuos peligrosos al finalizar la vida útil del equipo o sistema, según establecen las normas internacionales, nacionales y locales.
  • Page 5 April 7 29, 2006 New Edition July 15, 2008 Added TXR 425 Model Designation This document is the English original version, edited and supplied by the manufacturer. All Copy including Advisory Symbols: Type Style Arial. The state of revision of this Document is indicated in the code number shown at the bottom of this page.
  • Page 6 Standard Frequency Series Generators Maintenance SAFETY SYMBOLS The following safety symbols will be used in the equipment. Their meaning are described below. Attention, consult accompanying documents. Ionizing radiation. Type B equipment. Dangerous voltage. Ground. This symbol indicates that the waste of electrical and electronic equipment must not be disposed as unsorted municipal waste and must be collected separately.

  • Page 7: Table Of Contents

    Standard Frequency Series Generators Maintenance TABLE OF CONTENTS Section Page 1 INTRODUCTION ....................1 1.1 Tools and Test Equipment ................1 RADIATION AND ELECTRICAL SAFETY ............2 3 OPERATION ......................3 3.1 Operating the Console ................3 3.2 X-ray Exposure ..................3 4 X-RAY SYSTEMS – HOW THEY WORK ............4 4.1 X-Ray Control ....................4 4.2 The Purpose for X-ray Controls ..............4 4.3 High Voltage Transformer ................4...
  • Page 8 Standard Frequency Series Generators Maintenance 7.6 Troubleshooting Timing – High Tension – Filament ......12-13 7.7 Troubleshooting High MA ..............14-15 7.8 Troubleshooting Gassy X-ray Tube ............16-17 7.9 Troubleshooting Low MA .................18 7.10 Troubleshooting No MA ..............18-20 8 COLLIMATOR ....................21 8.0 Theory of Operation .................21 8.1 Mechanical Operation SID Selection ............21 8.2 Electronic Operation ................21 8.2.1 Power Supply ................21...

  • Page 9: Introduction

    This manual is written as a guide to help Biomedical Technicians and X-ray Servicepersons become familiar with TXR X-ray Control theory and circuitry. Those not trained in x-ray technology including electrical and radiation safety should not attempt repair of x-ray equipment. When covers are removed, persons will be exposed to Lethal voltages that exists throughout the entire circuitry of the equipment and they may be exposed to cumulative doses of x-radiation.

  • Page 10: Radiation And Electrical Safety

    Standard Frequency Series Generators Maintenance SECTION 2 RADIATION AND ELECTRICAL SAFETY Before attempting activities that require observation, testing, validating and documenting the results of such testing, become thoroughly informed to the danger of being exposed to electricity and x-radiation. Pay special attention to Advisory Symbols and statements in bold lettering throughout this manual.

  • Page 11: Operation

    Standard Frequency Series Generators Maintenance SECTION 3 OPERATION 3.1 OPERATING THE CONSOLE 1. Switch Control Power ON and turn Line Switch ON to X-Ray Control. 2. LED Display should light displaying MAS, MA and KVP. (LED’s indicates Unit is in operation). 3. Select 200 MA, 80 kVp, 1 Second. (LED Display should indicate 200 MAS-200MA-80 KVP). 4. Depress Rotor push-button (after a 2.2 second delay the green Ready lamp should energize. If the ready lamp does not energize, the problem is in the rotor circuit or before). See Control Schematic.

  • Page 12: Ray Systems - How They Work

    Standard Frequency Series Generators Maintenance SECTION 4 X-RAY SYSTEMS – HOW THEY WORK 4.1 X-RAY CONTROL There are four key components to x-ray systems the X-ray Control, High Voltage Transformer, Pair of High Voltage Cables, and an X-ray Tube. All other products added, such as Motor Driven Buckys, Stands, Tables and Ancillary Devices are operated independent of the system unless they are electrically attached to the X-ray Control.

  • Page 13: Troubleshooting Techniques

    Standard Frequency Series Generators Maintenance SECTION 5 TROUBLESHOOTING TECHNIQUES 5.1 ESTABLISHING TROUBLESHOOTING TECHNIQUES Effective Troubleshooting Techniques for Single and Three Phase X-ray Systems involves ones sight, hearing, training and understanding the operation of circuits and devices used in and with x-ray equipment. This manual is written for those who do not have a clear understanding of the Principles of X-ray.

  • Page 14: Meter Circuit Theory

    Standard Frequency Series Generators Maintenance SECTION 6 METER CIRCUIT THEORY 6.1 KVP METER The kVp Meter along with the kVp Compensating Circuit is fairly simple to understand and test. When the X-Ray Control is energized 95-110 VAC potential is present from MT-1 and MT-2 terminals. This is always a bucking voltage.

  • Page 15: Mas/Error Code Display

    Standard Frequency Series Generators Maintenance 6.2 MAS/ERROR CODE DISPLAY The Dual Function MAS – ERROR Code Meter serves three functions. It displays pre-set MAS, calculates MAS during exposures and at the end of exposures gives a total MAS. It also serves to Display Overloads and Error Messages. This meter cannot be adjusted. Its readings are from the X-ray Timer’s software.

  • Page 16: Troubleshooting Charts

    7.1 ERROR CODE CHART Models TXR 325 D, TXR 325 M, TXR 425 and TXR 525 SFQ X-Ray Controls come equipped with Self Diagnostics. Should a problem arise, observe the mAs meter display for one of the following error codes.

  • Page 17: Troubleshooting Rotor Circuit

    Standard Frequency Series Generators Maintenance 7.3 TROUBLESHOOTING ROTOR CIRCUIT SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST Open fuse or loose holder F1 Test Voltage A1 to A2 with unit ON. Should be 120-122 Rotating Anode doesn’t start. or F2 on the Mother Board. VAC.

  • Page 18: Troubleshooting Exposure Start W/O Bucky

    Standard Frequency Series Generators Maintenance 7.4 TROUBLESHOOTING THE EXPOSURE START CIRCUIT (WITHOUT BUCKYS) SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST Ready lamp lights but NO With the Control energized, test voltage from # J1-8 to # J1- SCR’s are shorted. See if EXPOSURE.

  • Page 19: Troubleshooting Exposure Start With Bucky

    Standard Frequency Series Generators Maintenance 7.5 TROUBLESHOOTING THE EXPOSURE START CIRCUIT (WITH BUCKYS) SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST Ready lamp lights but NO With the Control energized, test voltage from # J1-8 to # J1- SCR’s are shorted. See if EXPOSURE.

  • Page 20: Troubleshooting Timing - High Tension - Filament

    Standard Frequency Series Generators Maintenance 7.6 TROUBLESHOOTING THE TIMING-HIGH TENSION-AND FILAMENT CIRCUITS SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST Rotor Runs READY lamp P1 and P2 not Energized. Run a SIMULATED LOAD TEST. lights BACKUP CONTACTOR SCR’s Did Not turn ON. You contacts close and must confirm that the SCR’s EXPOSURE lamp lights are operating properly. Check during exposure, but no X- ERROR MESSAGE.
  • Page 21 Standard Frequency Series Generators Maintenance EXPECTED VOLTAGE MEASUREMENTS Continued Filament Circuit is Open or WHEN OPEN CIRCUIT EXISTS. Shorted. Measure voltage from XC to XS or XC to XL. With Prep Switch depressed voltage should be 100- 200VAC. If it is, remove the collimator and observe filament brilliance. If voltage is around 240VAC, there is an opening in the filament circuit.

  • Page 22: Troubleshooting High Ma

    Standard Frequency Series Generators Maintenance 7.7 TROUBLESHOOTING HIGH MA SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST Rotor Runs READY lamp X-Ray Tube Filament Initially, check output pulses at the X-Ray Tube. lights BACKUP CONTACTOR Characteristics are not the If pulses are correct, you must adjust filament voltage lower. comes in and EXPOSURE same. (Incompatible X-Ray LAMP lights during exposure.
  • Page 23 Standard Frequency Series Generators Maintenance Both filaments are lit. Remove Transformer XS shorted to XL. With Prep depressed check voltage from XC to XL and XC to XS. Collimator to confirm. HIGH MA (continued) Ground not proper. Grounding must be EARTH GROUND. Neutral must be connected to EARTH GROUND at incoming power supply. Loose connections, defective ground rod or the absence of the same will cause erratic exposures.

  • Page 24: Troubleshooting Gassy X-Ray Tube

    Standard Frequency Series Generators Maintenance 7.8 TROUBLESHOOTING GASSY X-RAY TUBE SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST HIGH MA (continued) Gassy X-Ray Tube Gassy X-Ray Tubes are the result of three actions. The normal evaporation of filament and anode material over the normal life of an X-ray Tube, accelerated evaporation of filament and breakdown of anode material caused by exceeding tube limits, and immediate breakdown in new tubes caused by...
  • Page 25 Standard Frequency Series Generators Maintenance MOST COMMON SYMPTOM HOW AND WHERE TO TEST PROBLEM HIGH MA (continued) Should the rotating anode be operating below 2700 RPM Anode Run Speed Too Slow. pitting, chipping and eventually cracking may occur. When this happens, the gas contaminates the envelope, allowing electrons to be attracted to the anode easily.

  • Page 26: Troubleshooting Low Ma

    Standard Frequency Series Generators Maintenance 7.9 TROUBLESHOOTING LOW MA SYMPTOM MOST COMMON HOW AND WHERE TO TEST PROBLEM High Voltage Cables Too Cable length is longer than the previous set used with the X- LOW MA Long. Ray Control. Adjust filament resistors. X-Ray Tube filament characteristics may be incompatible with present MA stabilizer and filament adjustments. You may Incompatible X-Ray Tube.
  • Page 27 Meter read-out on the X- Dyanalyzer or test Ray Control does not match instrument defective or out All TXR Controls are tested and calibrated at the factory. the Dyanalyzer or ion chamber of calibration. reading. MA is higher or lower than Check and calibrate all MA stations, check space charge.
  • Page 28 Standard Frequency Series Generators Maintenance F4, MT-1 or MT-2 open. Connect a voltmeter from MT-1 to MT- 2, turn control ON and check voltage. If 95 - 110 VAC is not present, replace fuse, tighten connections, or add 13 to 100 VAC, kVp compensation transformer.

  • Page 29: Collimator

    Standard Frequency Series Generators Maintenance SECTION 8 COLLIMATOR THEORY OF OPERATION (Eureka Collimators) All collimators used in general radiography work on the same principles. We use Progency products in many of our applications so we will devote this section to the way they work. A full section in the Installation Manual is devoted to every aspect of installation, alignments, testing and validating its operation.

  • Page 30: Light - Field Lamp Circuit

    Standard Frequency Series Generators Maintenance When the MC150 is supplied with the Linear MC150 power supply (70-20254) the incoming power is fused through F1 and stepped down by means of a transformer. A 24 VAC tap on the secondary of the transformer is fused through F2 and applied directly to the collimator projection lamp circuit. 110 volts or 230 volts incoming power can be selected via the switch on the power supply chassis.

  • Page 31: Ray Control Component Location

    Standard Frequency Series Generators Maintenance SECTION 9 COMPONENT LOCATION FULL VIEW OF CONSOLE COMPONENTS KVP Meter Slope Adjustment KVP Meter Blanking Adjustment KVP Meter MA Meter MAS/Error Display Ready/Expose Lamps MA Selector KVP Major Switch Time Selector KVP Minor Switch Prep Switch Earth Ground Bucky Switch...
  • Page 32 5481 Skyland Boulevard East • Cottondale, Alabama 35453 USA Telephone toll free in the USA: 1(800) TXR-X-Ray Telephone (205) 556-3803 • Fax (205) 556-3824 • www.txr.com PUBLICATIONS AVAILABLE FOR STANDARD FREQUENCY SERIES UNITS A full set of manuals are provided with each x-ray control.

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