TXR 325D User manual

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

¡ 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 incluidas se deben leer y comprender en su totalidad antes de intentar poner el equipo en funcionamiento.
Estaremos gustosos de asistir y cooperar en poner el equipo en marcha.
Aunque el equipo está construido según las normas de seguridad más estrictas y presenta un alto grado de protección contra las
radiaciones-X, ningún diseño practico puede ofrecer una protección completa. Tampoco ningún diseño practico puede obligar al operador
a tomar las precauciones adecuadas para prevenir la posibilidad de que cualquier persona de manera descuidada, poco sensata o
ignorante, se exponga a radiaciones directas o indirectas.
Es importante que cualquier persona relacionada con radiaciones-X esté debidamente entrenada y tome las medidas adecuadas para
asegurar la protección contra posibles lesiones.
El fabricante asume que todo operador y personal de servicio autorizado para manejar, instalar, calibrar o mantener este equipo, es
consciente del peligro que conlleva la exposición excesiva a las radiaciones-X, está suficientemente entrenado y posee los conocimiento
necesarios para ello. Por lo tanto, el equipo aquí descrito se vende entendiendo que el fabricante, sus agentes y representantes
no tienen ninguna responsabilidad en caso de lesiones o daños que puedan resultar de la exposición a dichas radiaciones.
Existen diversos materiales y dispositivos protectores, cuyo uso es recomendable.
IMPORTANT ! ... X-ray Protection
X-RAY EQUIPMENT IS DANGEROUS TO BOTH PATIENT AND OPERATOR
UNLESS MEASURES OF PROTECTION ARE STRICTLY OBSERVED
X-ray equipment if not properly used may cause injury. Accordingly, the instructions herein should be thoroughly
read and understood before attempting to place this equipment in operation. We will be glad to assist and
cooperate in placing this equipment in use.
Although this apparatus is built to the highest safety standards and incorporates a high degree of protection against X-radiation other
than the useful beam, no practical design of equipment can provide complete protection. Nor can any practical design compel the
operator to take adequate precautions to prevent the possibility of any persons carelessly, unwisely, or unknowingly exposing themselves
or others to X-radiation.
It is important that everyone working with X-radiation be properly trained and take adequate steps to insure protection against injury.
The manufacturer assumes that all operator and service personnel authorized to use, install, calibrate and maintain this equipment
is cognizant of the danger of excessive exposure to X-radiation, is sufficiently trained and has the required knowledges for it. The
equipment herein described is sold with the understanding that the manufacturer, its agents, and representatives are not liable for
injury or damage which may result from exposure to X-radiation.
Various protective material and devices are available. It is recommended that such materials and devices be used.
IMPORTANT ! ... Protection contre les rayons-X
L’EQUIPEMENT RAYONS-X EST DANGEREUX A LA FOIS POUR LE PATIENT ET POUR L’OPERATEUR
A MOINS D’OBSERVER STRICTEMENT LES CONSIGNES DE PROTECTION
L’équipement à rayons-X peut provoquer des blessures s’il n’est pas correctement utilisé. En conséquence,
les instructions de ce manuel doivent être lues attentivement et bien assimilées avant de tenter de mettre en
route ce matériel. Nous serons heureux de vous assister et de coopérer à l’installation de ce matériel.
Bien que cet équipement soit construit selon les normes de construction les plus sévères et qu’il comporte un haut degré de protection
contre le rayonnement-X en dehors du rayon utile, aucune conception n’apporte une protection totale. De même qu’aucune conception
ne peut obliger l’opérateur à prendre les précautions adéquates afin d’éviter que toute personne ne s’expose ou n’expose les autres
au rayonnement sans précaution, de façon imprudente et inconsciente.
Il est important que toutes les personnes travaillant avec le rayonnement-X soit correctement formées et prennent les mesures adéquates
afin de se protéger contre toute blessure.
Le constructeur suppose que tous les utilisateurs et le personnel d’entretien autorisé à utiliser, installer, calibrer et entretenir cet équipement
est conscient du danger de l’exposition excessive au rayonnement-X, est suffisamment formé et possède les connaissances nécessaires
pour cela. L’équipement décrit dans le présent manuel est vendu sous réserve que le fabricant, ses agents et représentants ne soient
pas tenus pour responsables des blessures ou dommages qui pourraient résulter d’une exposition aux rayons-X.
Plusieurs matériels de protection et systèmes sont disponibles. L’utilisation de ces matériels et systèmes de protection est recommandée.

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.
El fabricante recomienda que al finalizar la vida útil de equipo o sistema, se contacte con un
representante autorizado del fabricante o con un gestor autorizado de residuos para la retirada de este
equipo o sistema.
ENVIRONMENTAL STATEMENT
ON THE LIFE CYCLE OF THE EQUIPMENT OR SYSTEM
This equipment or system contains environmentally dangerous components and materials (such as
PCB‘s, electronic components, used dielectric oil, lead, batteries etc.) which, once the life-cycle of the
equipment or system comes to an end, becomes dangerous and need to be considered as harmful
waste according to the international, domestic and local regulations.
The manufacturer recommends to contact an authorized representative of the manufacturer or an
authorized waste management company once the life-cycle of the equipment or system comes to an
end to remove this equipment or system.
DECLARATION D’ENVIRONNEMENT
SUR LA VIE UTILE DE L’EQUIPEMENT OU SYSTEME
Cet équipement ou système contient des composants et matériaux dangereux pour l’environnement
(ex: électroniques cartes, composants électroniques, huile diélectrique usée, plomb, batteries, etc.),
lesquels sont considérés comme résidus dangereux en cycle terminal de vie d’un équipement ou
système, en accord avec les normes internationales, nationales et locales en vigueur.
Le fabricant recommande une fois le cycle terminal de l’équipement ou système atteint, de contacter
un représentant autorisé du fabricant ou les autorités compétentes en la matière afin d’organiser et
de gérer le recyclage adéquat de cet équipement ou appareil.

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REVISION HISTORY
REVISION DATE REASON FOR CHANGE
0 April 7 29, 2006 New Edition
1 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.
ADVISORY SYMBOLS
The following advisory symbols will be used throughout this manual.
Their application and meaning are described below.
DANGER ADVISES OF CONDITIONS OR SITUATIONS THAT IF NOT
HEEDED OR AVOIDED WILL CAUSE SERIOUS PERSONAL INJURY
OR DEATH
Warning Advises Of Conditions Or Situations That If Not Heeded
Or Avoided Could Cause Serious Personal Injury Or Damage Of
Equipment.
Caution advises of conditions or situations that if not heeded or
avoided could cause personal injury or damage to equipment.
Notes alert readers to pertinent facts and condition. Notes represent
information that is important to know but do not necessarily relate to
possible injury or damage to equipment.

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M-2008-7-15
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. Please contact an
authorized representative of the manufacturer or an authorized
waste management company for information concerning the
decommissioning of your equipment.

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TABLE OF CONTENTS
Section Page
1 INTRODUCTION................................................................................................1
1.1 Tools and Test Equipment..........................................................................1
2 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
4.4 High Voltage Cables ..................................................................................4
4.5 X-ray Tube .................................................................................................4
4.6 MA Stabilizer..............................................................................................4
5 TROUBLESHOOTING TECHNIQUES ..............................................................5
5.1 Establishing Troubleshooting Techniques..................................................5
5.1.1 Essentials Required for Producing X-ray .......................................5
5.1.2 Three Key Indicators for Effective Troubleshooting .......................5
5.1.3 Measuring Essentials at the High Voltage Tank.............................5
6 METER CIRCUIT THEORY ...............................................................................6
6.1 KVP Meter .................................................................................................6
6.2 MAS / ERROR Code Display.....................................................................7
6.3 MA Meter ...................................................................................................7
 6.4 TestingHVRectiers .................................................................................7
7 TROUBLESHOOTING CHARTS.......................................................................8
7.1 Error Code Chart .......................................................................................8
7.2 Troubleshooting Control and Meter Circuits ..............................................8
7.3 Troubleshooting Rotor Circuit ....................................................................9
7.4 Troubleshooting Exposure Start w/o Bucky.............................................10
7.5 Troubleshooting Exposure Start with Bucky ............................................ 11

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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
8.2.2 Light – Field Lamp Circuit ............................................................22
9 X-RAY CONTROL COMPONENT LOCATION ................................................23
9.0 Full View of Console Components...........................................................23

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SECTION 1
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.
This manual is one of a series of manuals provided with the x-ray system and should be used as a combined
approach to operating, testing, calibrating and validation by documenting results. The series of manuals
include: M-2008-7-12, M-2008-7-13, M-2008-7-14 and M-2008-7-15. Schematics are located in manual
M-2008-7-13.
1.1 TOOLS AND TEST EQUIPMENT REQUIRED FOR SERVICING X-RAY SYSTEMS
The following hand tools and products are required for the installation.
• Standardserviceengineerstoolkit.
• Drillandassortedbits.
• SiliconeInsulatingGrease(proongcompound).
• Alcoholcleaningagent.
The following test equipment is required for Calibration and Service.
• DigitalMultimeter.
• Non-invasivekVpMeter.
• DigitalmAsMeter.
• Non-invasiveDigitalmRMeter
• Calculator.
• StandsorTestInstrumentscalledforinsectionsofthismanual.
Only for AEC purposes:
• Sensitometer.
• Densitometer.
CopperPlatesfortheCollimatorFilterHolder(recommendedforAECcalibration):
• 2unitsof1.0mmthickness,
• 1unitof0.5mmthickness,
• 2unitsof0.2mmthickness,
• 1unitof0.1mmthickness.
• InsteadofCopperPlatesitcanbeusedAcrylicPlasticPlates:
• 6unitsof5cm.thickness
• 5unitsof1cm.Thickness
Only for Tomo purposes:
• Tomophantomtool.

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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.
WARNING: You are to have proper instrumentation to measure all energies used in and emitted from this
equipment. At no time are you to expose a person to the electrical circuitry of this equipment or position a
person where they will be exposed to the x-radiation emitted from the x-ray tube. No person is to be exposed
to actual testing of the equipments radiation output. This equipment may only be used for diagnostic x-ray
purposesbyqualiedphysicianortechnicians.
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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.
5. When the green ready lamp energizes, depress the Exposure push-button and record the mA or
mAs test meter reading. The recorded mA or mAs should be in the range of +/- 10% of the mA or
mAs selected.
6. With Bucky Installed. If there is no exposure and the unit is switched to Bucky ON, change the
switch to Bucky OFF and retest. (If exposure meets condition of 5 above, trouble is in the bucky
circuit).
7. If there is still no exposure initiated under condition 6, the problem is most likely in the Timer, Timer
Switch, the Ribbon Cable connecting the timer to the timer switch, or the back-up contactor.
If any of the problems listed above are evident, refer to the Error
Code Table and the Troubleshooting section of this manual.
3.2 X-RAY EXPOSURE
1. Turn main line switch ON.
2. TurnX-RayControlpowerswitchON.(PowerON).
3. Select mA.
4. Select kVp.
5. Select Time.
6. Select Bucky OFF, TABLE or WALL.
7. Position source and image receiver.
8. Take up position behind protective barrier.
9. Depressrotorpush-button(After2.2seconds,greenreadylampenergizes).
10. Depress Exposure switch keeping rotor push-button depressed. During x-ray production the amber
exposurelampwillilluminate.Uponterminationofx-rays,anaudiblesignalwillbenoticed.
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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. Sometimes such devices are used to connect signals back into the X-ray Control Circuitry. For
effective troubleshooting, inexperienced X-ray service people may have to electrically isolate or disconnect
such devices from the X-ray Control.
4.2 THE PURPOSE FOR X-RAY CONTROLS
Although it requires a step up transformer the X-ray Control is considered to be a stand-alone device. Its sole
purpose is to provide three regulated and controlled sources of power.
1. First, it provides Rotor Start Sense and Time Delay Run power to the X-ray Tube Stator.
2. Second, it provides Regulated XC to XS or XC to XL Voltage to the Primary Filament Transformer of
the High Voltage Transformer, which is stepped down to supply pre determined current to the Tube
Filament.
3. Third, it provides Compensated and Timed P1 and P2 Voltage to the Primary of the Transformer, so
itcanbesteppeduptohighvoltageandRectiedforusebytheX-rayTube.
4.3 HIGH VOLTAGE TRANSFORMER
High Voltage Transformers do not regulate current or voltage. Its sole purpose is to take the voltage that the
X-ray Control provides and step it up or down.
1. TheHighVoltageTransformerprovidesStep-DownlamentVoltageswhichisdeliveredtotheX-ray
Tube Filaments through the Cathode X-ray Cable.
2. ItalsotakeslowerPrimaryVoltageandstepsituptoKilovoltage,whichisFullWaveRectiedand
delivered to the X-ray Tube through the Anode and Cathode X-ray Cables.
4.4 HIGH VOLTAGE CABLES
High Voltage Cables serve two functions.
1. TheyconnectthelamentvoltagefromtheHighVoltageTransformertotheX-rayTube.
2. TheyconnectthefullwaverectiedkilovoltagetotheX-rayTube.
4.5 X-RAY TUBE
TheX-rayTubeisaHighVoltageDiodeVacuumTubethatisequippedwithtwolamentsandoperatesupto
125KVP.Itssolepurposeistodeliverapre-determineddoseofradiation,whilelamentisconducting,per
timed KVP voltage delivered to its cathode and anode circuits.
4.6 MA STABILIZER
The mA Stabilizer is a constant potential saturable reactor that provides multiple voltage outputs, which
compensates for longer or shorter than usual length high voltage cables. Also, 50 hertz applications require
more steel and heavier copper windings. For selecting different output voltages from the stabilizer, taps are
provided.

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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. Other helps are
included throughout the Manual where we believe they may be needed. A complete Training Manual BMET 4
has been written and is available on CD for those who wish to have a better understanding of x-ray systems,
devices and instruments.
5.1.1 ESSENTIALS REQUIRED FOR PRODUCING X-RAYS
Threeessentialsarerequiredtoproducex-rays.Avacuumtube(x-raytube),asourceoffreeelectronsthat
canbeboiledoffalament,withinthevacuumtube(x-raytubelaments)andaHighVoltageDifferenceof
Potential with the Anode of the X-ray Tube being Positive in respect to the Cathode. It is fairly easy to produce
X-rays but it is not so easy to control them.
5.1.2 THREE KEY INDICATORS FOR EFFECTIVE TROUBLESHOOTING
Three main indicators reveal problems that exist in x-ray equipment and these provides the Keys to establishing
effective troubleshooting Techniques. The indicators are:
1. High MA, which can cause light images, dark images and kicking circuit breakers.
2. Low MA, which mainly causes light images.
3. NoMA,whichproducesnoradiation(noimages).
Since the X-ray Tube requires certain compensated and regulated voltages, which is delivered by the High
Voltage Transformer, it is easy to determine which is the key to understand the circuit that needs testing,
analysis and repair. Since the KVP circuit is compensated for loading, it is somewhat independent. On the
other hand, the MAcircuits are fully regulated but independent. The three Key indicators, High, Low, and No MA
cannot be discerned by our natural Senses. They can only be measured at the High Voltage Transformer.
5.1.3 MEASURING ESSENTIALS AT THE TANK
Regardless of ones training or experience, when x-ray machines have operational problems, it is always
best to measure the essentials at the Tank or High Voltage Transformer. After these essentials are measured,
you must believe what the MA or MAS Meter is revealing to you. Non invasive KVP, Timers and m/R meters
are great to use for calibration but they cannot identify every problem. As you will see in the troubleshooting
section there are voltages and voltages with time delays that are expected and must be measured at certain
points. Insert MA Meter into X-ray Control MA Circuit.
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M-2008-7-15
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. This voltage is coupled to each end of the kVp Meter Compensation Adjustment Resistor
(2500ohm100watt).Youshouldreadthesamevoltageacrosstheresistor.Ifyoudo,turnOFFX-RayControl
andremoveFUSE4andmeasuretheresistance.If2500ohmsisnotmeasuredreplacetheresistor.Should
the resistor overheat or OPEN, remove MT-1 and MT-2 and order 13 to 100 VAC Compensation Transformer
from the factory. If the resistance is 2500 ohms check all connections ensuring H1 Voltage is present at each
compensating band that is selected. If all these measurements are proper replace the kVp Meter Board.
The kVp Meter Compensation Resistor serves two purposes:
(A) ThekVpMeterCompensationResistorisparalleltotheAutotransformerallowingimmediate
correctionofkVpMeterSettingsshouldlinevoltageuctuate.Theuctuationisnormallyno
lower than 95 and no higher than 110 VAC. This is the proper voltage range.
(B) ThekvpMeterCompensationResistorisconnectedforeachmA(LoadbyindividualmA
relays K1 through K7 C Contacts. Compensation adjustments are for unit loss that occurs
when current is moving in the high voltage secondary. Because of loading, kVp will decrease
at the X-Ray tube. The bucking voltage selected from the 95-110 VAC supply bucks H1 to H2
Voltage.ThenalVoltagedifferenceiscoupledtothekVpMeterallowingittopre-readthe
correct kVp that will appear at the X-Ray tube.
Therelationshipofkilovoltageoutputtoprimaryvoltageinput(P1,P2)willnotchangeunlesstheturnratio
of the high voltage transformer has changed due to a partial breakdown. Partial breakdown occurrences
are very rare. Should you suspect a partial breakdown in the high voltage transformer detection is quite
simple. Remove the High Voltage Transformer from the tank and measure the resistance in each winding. The
resistance across P1 and P2 is 7 ohms. The resistance across the output of either high voltage transformer
windings will vary from 8000 to 8100 ohms.
After reassembling the transformer wait 24 hours before testing. Re-energize the equipment by turning on
the main switch and make an exposure of approximately 2 seconds at 60 kVp, 50 mA. Observe the mA meter
reading. The reading should be 50 mA. Select 90 kVp at 50 MA, 2 seconds, and make an exposure. The
reading should be 50 MA. Take an exposure 120 kVp at 50 MA, 1 second. MA should be within the tolerance.
Now begin calibrating all MA and kVp stations observing actual MA and kVp outputs. Higher current readings
could indicate other problems. See trouble shooting section.
NOTE: Standard frequency series generators are equipped with MAX/MIN (maximum and
minimum KVP Meter limits which will inhibit the rotor from starting — thus preventing
X-Ray exposures).
Limits are factory set at 50 KVP Minimum / 125 KVP Maximum.

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Standard Frequency Series Generators
Maintenance
7
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.
6.3 MA METER
The MA meter is a simple Digital resistor/diode Display that indicates MA stations selected. This meter cannot
be adjusted.
6.4 TESTING HIGH VOLTAGE RECTIFIERS
Properlytestinghighvoltagerectiersrequiresspecialtestequipment.Replacesuspecteddefectiverectier
board and return old one to the factory for testing. This is the simplest and safest way to test these type
parts.
DO NOT MAKE ANY TEST EXPOSURES WITH TRANSFORMER OUT
OF OIL.
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Standard Frequency Series Generators
Maintenance
8
M-2008-7-15
SECTION 7
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.
ERROR CODE DESCRIPTION
O.L. Indicates – Exceeds Tube Limit
E02 Indicates – KVP over range
E03 Indicates – KVP under range
E04 Indicates – Opening in MA cables or switch
E05 Indicates – Opening in Timing cable or switch
SCR Indicates – Leaky or shorted SCR
TROUBLESHOOTINGTECHNIQUE:THREEMAININDICATORSMUSTBEOBSERVED
HIGH - LOW – NO MA
7.2 TROUBLESHOOTING THE X-RAY CONTROL AND METER CIRCUITS
SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST
X-Ray Control will not energize No power for X-ray L1, L2
and ground
Check Power feeding X-ray including main panel. Requires
240VAC Nominal. Range 200-278 VAC.
Circuit Breaker Defective With Circuit Breaker in the on position check voltage across
major to minor line strap. Should read: 200-278 VAC
ControlEnergizesbutLED’sare
not lit.
Open fuse or loose fuse
holder A1 or A2.
With Line to Auto Strapped properly and with the Circuit
Breaker on, check voltage from A1 to A2. Should be 120-
122 VAC.
No MA Meter Reading Open fuse or lose fuse holder
F6.
With Line to Auto Strapped properly and with the Circuit
Breaker on, check voltage from A1 to F6. 8 VAC
Defective MA Meter Replace MA Meter, Ribbon Cable Connector or MA
Selector.
kVp Meter Reading not Stable
– Numbers on the kVp Continues
to countdown toward zero.
Open Fuse or loose Fuse
Holder F4 or F5.
With Line to Auto Strapped properly and with the Circuit
Breaker on, check voltage from A1 to F5 = 24 VAC. For
Fuse 4 check voltage MT-1 to MT-2 = 100 VAC.
Major or Minor Selector
defective.
Be sure that the kilovolt selectors are not stuck between
contacts, but are properly indexed on a contact point. Make
sure ALL contact points on both switches are good.
KVP Meter Compensation
Circuit
There may be an OPEN in the kVp Compensation Resistor,
Compensation Transformer, or K1 – K7 Relays are NOT
ENERGIZING.
Defective Kilovolt Meter Check Kilovolt Meter, it may have a defective part.

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Standard Frequency Series Generators
Maintenance
9
7.3 TROUBLESHOOTING ROTOR CIRCUIT
SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST
RotatingAnodedoesn’tstart. Open fuse or loose holder F1
or F2 on the Mother Board.
Test Voltage A1 to A2 with unit ON. Should be 120-122
VAC.
Open Fuse or loose fuse
holder on Rotor Board.
Replace fuse or tighten fuse holders on Rotor Board.
Defective Prep Switch Test Voltage #3 to A1 PREP. 120-122 VAC.
Open PBL/SID/Thermal/
DOOR Interlock Safety
Switch Circuit.
Test Voltage #4 to A1 PREP. 120-122 VAC.
Defective Rotor Cable or
improper connections
07-08-09
Check continuity of wires from Control Terminals O7 - O8
and O9 to Tube Stator. If any of these wires, terminals, or
buttsplicesareOPENCIRCUITorloose,theAnodewill
NOT ROTATE. Check Harness from the Tube Rotor to the
Rotor Control Board located in the Control.
Defective Tube Stator or
broken insert.
Checkcontinuityoftubestator.Youshouldndcontinuity
between any pair of the three {3} terminals. Gently shake
Tube Head or look into port to see if X-ray Tube is BROKEN.
If the tube is broken the anode will NOT ROTATE nor will
thelamentLIGHTUP.
Defective Rotor Start
Capacitor.
Check Capacitor with a capacitor tester. If this capacitor is
either OPEN or SHORTED, the anode will not operate.
Defective 7634 Rotor Board Replace Rotor Board.
Rotating Anode Starts and Runs
but “READY” DOES NOT LIGHT
Rotor wiring is connected
incorrectly. Leads are
reversed.
Remove interconnect from x-ray control and Properly re-
connect to Mother Board Terminals 07 Color Black-08
Color Red or Green-09 Color White.
An exposure cannot be made. OPENFUSEorloosefuse
holder on Rotor Board.
Replace fuses or tighten fuse holders.
An untested x-ray tube with
defective stator or wiring,
connected incorrectly has
been installed.
Check out current draw in the stator circuit leads No. 7
and 8. The current in each of these leads should be 1.75
amperes or more. Check wiring.
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Standard Frequency Series Generators
Maintenance
10
M-2008-7-15
7.4 TROUBLESHOOTING THE EXPOSURE START CIRCUIT (WITHOUT BUCKYS)
SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST
Ready lamp lights but NO
EXPOSURE. Backup Contactor
will not close.
SCR’sareshorted.Seeif
ERROR CODE is Displayed.
With the Control energized, test voltage from # J1-8 to # J1-
10 on the bottom left end of the Mother Board. No voltage
should be present. If there is voltage present and you can
vary it by adjusting the Major and Minor Selectors, the
SCR’sareshortedandmustbereplaced.
Defective Timer Selector or
loose Ribbon Cables from
Timer to selector.
Ensure all ribbon cable is docked properly at the Timer and
the Selectors. Repair or replace.
SYSTEM WITHOUT
BUCKYS:
1. Bucky Selected
when system is not equipped
with Bucky.
2. Bucky Select Switch or
its wiring or connections
are defective.
3. Exposure Switch
defective.
4. Power not getting to X-
ray Timer.
5. Condition A. Contactor
Coil, its wiring or
connectors are defective.
Condition B. Both
Contactor Coil and
Expose Lamp are
defective.
Condition C. Timer is
defective.
Test 1-5 Set Timer to three seconds
1. Switch Bucky OFF. If an exposure is now possible,
place a permanent jumper from B1 to B2.
2. If an exposure cannot be made place a jumper
between Terminal #7 to B1. Now, if an exposure is
possible, the Bucky Switch or its wiring connections
are defective and must be repaired or replaced.
3. Place a jumper between Terminals #6 and #7. If an
exposureisnowpossible,ReplacetheEXPOSURE
SWITCH.
TIMER SECTION
4. During Timer Standby continuous 120 VAC is required
on Timer Pins J1-2 and J1-4. Place volt meter between
thosepinsandconrmvoltage.
For Exposures, The X-ray Timer requires 120 VAC
on B1 and the Timer pin J1-9. Place voltage meter
probes to A1 and B1. Depress Exposure Pushbutton.
After a 2.2 second time delay 120 VAC should appear.
If it does, place voltage meter probes to A1 and Pin
J1-9. Take another exposure. If the voltage appears
continue with the next test.
5. After Tests 1-4, with measurements conrmed, the
Timer, Backup Contactor, their wiring, or connections
must be examined.
Condition A. Observe the Exposure Lamp. It is
wired parallel to the contactor coil and is energized
by the same voltage. Either can work independently.
Does the Exposure lamp light and extinguish
during Exposures? YES – Then the Contactor Coil,
its wiring or connectors could be open. Place a volt
meter across the contactor coil and take an exposure.
If, during exposures, voltage is present the contactor
coil is open. If voltage is not present check its wiring
from A1 and J2-2. Repair or replace.
Condition B. Observe Exposure Lamp. Does the
Exposure lamp light and extinguish during
Exposures? NO – Place a voltmeter between Timer
pin J2-2 and A1. Take an exposure – Does the meter
indicate 120 VAC during exposures. If it does the
Timer is ok but the contactor coil and exposure lamp
are both defective. Repair or replace.
Condition C. After the above tests have been
completed and veried, place voltmeter probes
between J2-2 and A1. Take an Exposure. Does the
meter indicate 120 VAC during exposures? NO –
Timer is defective. Replace.

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Standard Frequency Series Generators
Maintenance
11
7.5 TROUBLESHOOTING THE EXPOSURE START CIRCUIT (WITH BUCKYS)
SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST
Ready lamp lights but NO
EXPOSURE. Backup Contactor will
not close.
SCR’sareshorted.Seeif
ERROR CODE is Displayed.
With the Control energized, test voltage from # J1-8 to # J1-
10 on the bottom left end of the Mother Board. No voltage
should be present. If there is voltage present and you can
vary it by adjusting the Major and Minor Selectors, the
SCR’sareshortedandmustbereplaced.
Defective Timer Selector or
loose Ribbon Cables from
Timer to selector.
Ensure all ribbon cable is docked properly at the Timer and
the Selectors. Repair or replace.
Ready lamp lights, Bucky will not
Run. NO EXPOSURE. Backup
Contactor will not close.
SYSTEM WITH BUCKYS:
1. The Bucky, its fuses,
wiring or connections are
defective.
2. The Bucky, its fuses,
wiring or connections are
defective.
3. A. Bucky is connected
to the wrong terminals in
the x-ray control.
B. The lead or
connections from B4 in
the x-ray control to Bucky
Terminal B4 is open.
C. The required
jumper between Bucky
Terminals B2 and B3 is
missing or open.
D. The lead or
connections from B2 on
the Bucky and B2 in the
x-ray control are open.
E. The Bucky Switch, its
wires or connectors is
open.
Theory: When Table or Wall Bucky is selected on the X-
ray Control, the X-ray Control Exposure Switch becomes
the contacts to power the Bucky Motor Drive Circuit.
Operation: Depress the Exposure Switch. After a 2.2
second time delay power is applied to the Bucky Motor
Circuit B3 to B4. The Bucky Motor begins to drive and move
thex-rayltergridacrossthefrontofthereceptor(foras
longastheswitchisdepressed).Atsomepoint,thex-ray
ltergridbrackettripsandholdsinaswitchlocatedinside
theBuckyAssembly.Thisswitch’scontactsconnectsB2
to B1, supplying 120 VAC power to the x-ray timer and - it
becomes the X-ray Exposure Switch. If an exposure is now
possible, the problem is in the Bucky or its wiring.
Troubleshooting Bucky Circuit
Test 1-5 Set Timer to three seconds
1. Switch Bucky OFF. If an exposure is now possible,
the problem is in the Bucky or its wiring. Repair or
replace. Continue.
2. Switch Bucky On: Select the Bucky that is not
working. Place volt meter probes between B3 an B4 on
the Bucky Terminals. Depress Exposure Pushbutton.
After a 2.2 second time delay 120 VAC should appear
between B3 and B4. If 120 VAC appears at the Bucky
Terminals B3 and B4, the Bucky Motor, its fuses,
internal wiring or connections is defective and must
be repaired or replaced.
3. With the Exposure Pushbutton Depressed: If 120 VAC
does not appear between B3 and B4 several problems
are possible.
A. Bucky is connected to the wrong terminals in
the x-ray control. Wall Bucky is connected to
Table Bucky Terminals, etc. Remove and correct
wiring.
B. The lead or connections from B4 in the x-ray
control to Bucky Terminal B4 is open.
C. The required jumper between Bucky Terminals
B2 and B3 is missing or open.
D. The lead or connections from B2 on the Bucky
and B2 in the x-ray control are open.
E. The Bucky Switch, its wires or connectors is
open. To check, place a jumper between #7 and
B2. Depress Exposure Pushbutton. If Bucky
Motor runs and an exposure is made replace the
Bucky Select Switch.

Standard Frequency Series Generators
Maintenance
12
M-2008-7-15
7.6 TROUBLESHOOTING THE TIMING-HIGH TENSION-AND FILAMENT CIRCUITS
SYMPTOM MOST COMMON PROBLEM HOW AND WHERE TO TEST
Rotor Runs READY lamp
lightsBACKUPCONTACTOR
contacts close and
EXPOSURElamplights
during exposure, but no X-
rays are emitted from the X-
Ray Tube.NO MA.
P1 and P2 not Energized.
SCR’sDidNotturnON.You
mustconrmthattheSCR’s
are operating properly. Check
ERROR MESSAGE.
RunaSIMULATEDLOADTEST.
The X-ray Tube Filament
selected is not lit.
The Cathode High Voltage
Cable has an open lead. It
is not providing solid contact
between the x-ray tube and
thehighvoltagetransformer’s
cathode receptacle.
X-ray Tube Filament is open.
VISUAL INSPECTION
RemoveCollimator.SelectlargeandthensmallX-raylaments.
SeeifeachlamentlightsupduringPREP.If both laments
light up properly, the problem is in another area. Disregard
the rest of this section.
If the laments do not light, continue.
SELECT ALTERNATE MA STATIONS AND SEE IF X-RAY
EXPOSURES ARE POSSIBLE.
If x-rays are possible on either the small or large focal setting
but not both, the problem may be in the following areas.
1. Arc Suppression Insulator on ends of Cathode Cable.
Remove them and with a thin knife blade, carefully
spread the cable pins. Clean cable ends, apply
insulating compound, insert into receptacles, tighten and
test. If problem remains ohm out cathode cable leads.
Install new cathode cable.
2. X-raytubelamentisopen.ReplaceX-rayTube.
3. Filament Circuit is open or shorted. Continue with next
test and for additional troubleshooting,
See LOW MA-NO MA Section.