Technical Publications AMX−4+ Calibration (Model 2169360
Contents
1. GE MEDICAL SYSTEMS AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES REV5 os Y amp sm DIRECTION 2173223 100 APPENDIX A SYMBOLS All symbols used on the equipment and in its accompanying documents are shown and explained in this appendix Caution advises of an avoidable condition that could cause minor physical injury or damage to equipment or data Warning advises of an avoidable condition that may allow or cause a personal injury or the catastrophic destruction of equipment or data Danger advises of an avoidable condition that will cause serious or fatal injury Type B Equipment Internal electrical power source provides an adequate degree of protection against electrical shock X ray emission X ray tube head is emitting x rays Take adequate precautions to prevent the possibility of any persons carelessly unwisely or unknowingly exposing themselves or others to radiation Battery power on This does not apply mains voltage Battery power off This does not remove mains voltage 43 GE MEDICAL SYSTEMS REV5 e i 8 b AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Control for indicating radiation field by using light Collimator blades closed The controlled blades are shown in thicker lines Collimator Blades open The controlled blades are shown in thicker lines Functional Earth ground Terminal Ter2. REV5 DIRECTION 2173223 100 1 4 Power up Sequence See Illustration 1 4 Power up sequence starts either when power is applied or the micro processor reset switch is pressed The service program starts when the service switch is closed before power up With the service switch closed the power up program stops only when an error is found that prevents the calibration program from operating properly Nor mally it completes testing then activates the service program bypassing application pro grams ILLUSTRATION 1 4 POWER UP FLOW CHART SERVICE SWITCH CLOSED PERFORM POWER UP TESTS CALIBRATION PROGRAM 1 5 Calibration Error Prompts Section 4 contains an alphabetical listing of calibration error prompts Calibration errors are detected by the service program An understanding of x ray generators good trouble shooting skills and common sense will help determine the required action if an error prompt displays 15 GE MEDICAL SYSTEMS REV5 AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Jumpers and Switch Positions Set for French or English Operator Messages FRENCH ENGLISH FRENCH ENGLISH Selection of French or English operator messages is determined by position 6 of DIP switch S75 on the AMX Controller CPU Board 46 264974 or 5350022 1 Look at the operator messages displayed to determine if they are in the desired lan guage If the operator messages are
3. See Illustration 2 1 Set the service switch down to the service position 2 Reset the AMX 4 using one of the following methods e If power is off turn the Key Switch to the on position e If power 15 and the top cover is installed turn the power key off and back on e If power is on the top cover is removed providing access to the processor board press the processor reset switch 1 2 1 5183 When the service program is ready menu selection END SERVC MODE appears on the Message Display ILLUSTRATION 2 1 SERVICE SWITCH LOCATION KEY SWITCH SERVICE SWITCH IN LEFT SIDE 2 2 Enter Calibration Illustration 2 2 shows calibration selection using the kVp kVp W and mAs Y switches Shaded boxes illustrate the selection path to calibration procedures There are three choices after entering service program 17 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 e END SERVC MODE prompts to set service switch to run position then to cycle key switch e DATA BASE ACCESS is proprietary It requires a password to operate The pass word is available by license agreement CALIBRATE SYSTEM contains calibration procedures Enter calibration by pressing kVp until the prompt CALIBRATE SYSTEM displays then press mAs Y The prompt changes from CALIBRATE SYSTEM to CAL DRIVE HANDLE indicating that the calibration menu is ready for sele
4. These are the result of comparing calibration val ues in RAM with allowed maximum or minimum values stored in PROM 3 Hardware errors like Battery Error 1 These are the result of an error bit set during a read or comparing a calibration port value with the allowed maximum or minimum value stored in PROM Calibration error prompts are a guide to possible problems not problem solvers For exam ple if Battery Error 2 appears during generator calibration it is informing you that the bat tery was low when battery voltage was checked Several conditions could cause this error to occur A high energy exposure could have made battery voltage drop below the preset mini mum for a short time The battery could need charging The battery charger could need cali bration An understanding of x ray generators good trouble shooting skills and common sense will help determine the required action Something is out of limits A maximum or minimum value was inserted so that calibration can continue Continue calibrating and watch for maximum or minimum limit errors Counter overflowed while determining battery voltage Frequency at Charger Board TP 6 must be less than 10 kHz Multiplexer U76 on Charger Board 46 288786G2 or 01004 01005 01006 on Charger Board 5350026 must be operating properly Reading battery voltage port indicated less than 80 volts e Battery voltage must be properly calibrated Check connection between CPU and
5. kp Wg gt kVp A PREVIOUS NEXT CAL DRIVE HANDLE LOAD DEFAULTS 19 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 THIS PAGE INTENTIONALLY LEFT BLANK 20 GE MEDICAL SYSTEMS REV5 SECTION 3 CALIBRATION 3 1 Calibrate Drive Handle Note Note ILLUSTRATION 3 1 DRIVE HANDLE AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 This calibration unit can be performed at any time There are no interactions with other calibration units Voltage across sensors on each side of the drive handle changes as drive handle position changes The microprocessor uses this voltage to determine how fast the drive wheels should turn Wheel speeds are set separately to allow driving forward and turning Press either KVp orkVp Y until the prompt CAL DRIVE HANDLE displays then press mAs W The prompt changes to RELEASE HANDLE indicating that handle Zero Point may be set 1 To exit CAL DRIVE HANDLE without changing any values press MAS The prompt changes to EXITING then to CAL DRIVE HANDLE indicating that drive handle calibration is not active and another selection may be made from the main calibration menu Check the handle to make sure it moves freely and is not being pushed Press mAs W The prompt changes to ZERO POINT SET followed by the gain prompt PRESS LEFT FWD See Illustration 3 1 While holdin
6. MAS DN NEW CAL will appear e If the Calibrate Taps procedure was previously completed MAS UP EXIT MAS DN NEW CAL will appear e If the generator calibration is out of sequence one of the following messages will display MAS CAL REQUIRED or KVP CAL REQUIRED 2 Press the x ray prep switch The prompt changes to READY FOR X RAY 28 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 3 Press the x ray switch making an exposure The generator beeps indicating an expo 2 0 sure has been made Release both prep and x ray switches The prompt changes to BATTERY RECOVERY then to PRESS PREP indicating that that another ex posure must be made 4 When the last exposure is completed the prompt changes to CALIBRATE TAPS indicating that tap calibration is complete and another selection may be made from the generator calibration menu Note If an error message is displayed during CALIBRATE TAPS record the message for your reference and press mAs to continue Note If x ray tube spits occur at the high taps discharge the batteries to between 112 5 and 113 0 volts and do the Calibrate Taps procedure again This will reduce the maximum kVp at the high taps 3 3 6 Calibrate Filament Current Table Calibrate Filament Current Table takes about 15 minutes 1 Press either kVp orkVp until the prompt CAL FIL CUR TBL displays then press mAs Y The prompt
7. already in the desired language do no more in Section 2 2 If you want to change the language of the operator messages set Position 6 of DIP switch S75 on the AMX Controller CPU Board as follows The other positions of S75 are shown for reference but should not require changing a If S75 is a rocker switch set to look like this CLOSED ON OPEN OFF 123 45 67 8 POSITIONS 5 6 amp 7 CLOSED ON WITH ROCKERS DEPRESSED THIS SIDE POSITIONS 1 2 3 4 amp 8 OPEN OFF WITH ROCKERS DEPRESSED THIS SIDE 123 45 6 7 8 POSITIONS 5 amp 7 CLOSED ON CLOSED ON WITH ROCKERS DEPRESSED THIS SIDE OPEN OFF POSITIONS 1 2 3 4 6 amp 8 OPEN OFF WITH ROCKERS DEPRESSED THIS SIDE b If S75 is a slide switch set to look like this CLOSED ON OPEN OFF 123 45 6 7 8 POSITIONS 5 6 amp 7 CLOSED ON WITH LEVERS THIS SIDE POSITIONS 1 2 3 4 amp 8 OPEN OFF WITH LEVERS THIS SIDE 123 45 6 7 8 POSITIONS 5 amp 7 CLOSED ON CLOSED ON WITH LEVERS THIS SIDE OPEN OFF POSITIONS 1 2 3 4 6 amp 8 OPEN OFF WITH LEVERS THIS SIDE 16 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 SECTION 2 ENTERING CALIBRATION 2 1 Start Service Program The service program must be entered before calibration can be used The service program starts when the service switch is closed before power up Start the service program by 1
8. changes to PRESS PREP 2 Press the x ray prep switch The prompt changes to READY FOR X RAY 0 4 3 Press the x ray switch making exposure generator beeps indicating expo sure has been made Release both prep and x ray switches The prompt changes to BATTERY RECOVERY indicating that battery voltage is stabilizing after the expo sure The prompt changes to PRESS PREP 4 When the last exposure is completed the prompt changes to CAL FIL CUR TBL indicating that tap calibration is complete and another selection may be made from the generator calibration menu Note If an error message is displayed during CAL FIL CUR TBL record the message for your reference and press mAs to continue 3 3 7 End Generator Calibration 1 See Illustration 3 7 A generator calibration menu selection must be displayed 2 Press mAs The prompt changes to EXITING then to CAL GENERATOR indicating that generator calibration is not active and another selec tion may be made from the main calibration menu 3 Remove High Voltage Bleeder and install high voltage cables in tube housing if not already done previously Reference Direction 46 013871 Silicone Grease for Hi Voltage Cable Terminations 29 GE MEDICAL SYSTEMS REV5 ILLUSTRATION 3 7 EXIT GENERATOR CALIBRATION AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 CAL GENERATOR CALIBRATE MAS CALIBRATE TA
9. only utilize qualified personnel i e GE s field engineers personnel of third party service companies with equivalent training or licensed electricians to perform electrical servicing on the equipment DAMAGE IN TRANSPORTATION All packages should be closely examined at time of delivery If damage is apparent have notation damage in shipment written on all copies of the freight or express bill before delivery is accepted or signed for by a General Electric representative or a hospital receiving agent Whether noted or concealed damage MUST be reported to the carrier immediately upon discovery or in any event within 14 days after receipt and the contents and containers held for inspection by the carrier A transportation company will not pay a claim for damage if an inspection is not requested within this 14 day period Call Traffic and Transportation Milwaukee WI 414 827 3449 8 285 3449 immediately after damage is found At this time be ready to supply name of carrier delivery date consignee name freight or express bill number item damaged and extent of damage Complete instructions regarding claim procedure are found in Section S of the Policy amp Procedure Bulletins 6 17 94 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 THIS PAGE INTENTIONALLY LEFT BLANK AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 22759
10. to INSTALL METER indicating the volt meter may be calibrated 2 See Illustration 3 2 Install a digital volt meter lead to Battery Charger Board 1 Al TP 10 and lead to TP 9 Select range to to display 150 VDC Press mAs A The prompt changes to CALIBRATING then to ENTER VALUE Battery voltage appears on the kVp and mAs display 3 Match the voltage value displayed on the kVp and mAs display with the reading on the meter e Pressing kVp increases displayed voltage e Pressing kVp decreases displayed voltage 4 PressmAs when displayed voltage is the same as voltmeter voltage The prompt changes to REMOVE METER indicating Voltmeter is calibrated You may check volt meter calibration by entering the procedure again and verifying that the displayed value agrees with your meter 5 Remove Voltmeter from the Battery Charger Board Press mAs The prompt changes to CAL VOLT METER indicating that another selection may be made from the main calibration menu Note If an error message is displayed during CAL VOLT METER record the message for your reference and press mAs to continue ILLUSTRATION 3 2 VOLT METER TEST POINTS AMX1A3 CHARGER BOARD AMX1 1 22 GE MEDICAL SYSTEMS REV5 3 3 3 3 1 Calibrate Generator Note Note Note Note Cal Generator Menu AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Insure proper generator calibrat
11. 2 Press the x ray prep switch The prompt changes to READY FOR X RAY 3 Make an exposure by pressing the x ray switch The generator beeps indicating an exposure has been made Release both prep and x ray switches o AMX1A4 4 One of three prompts displays a IfENTER VALUE displays read stable kVp value on the oscilloscope See Illus tration 3 6 e If displayed kVp is less than stable kVp press kVp The display will increase in 0 1 kVp increments e If displayed kVp is larger than stable kVp press kVp W The display will decrease in 0 1 kVp increments e When displayed and stable kVp agree within 0 1 kVp press mAs W The prompt changes
12. 38 SERIES REV5 DIRECTION 2173223 100 TABLE OF CONTENTS SECTION 1 INTRODUCTION 10 1 1 Identification een nl RE 10 1 2 General td a e a e cd ds do e lt 11 1 3 Component Identification 12 1 4 Power up Sequence a pd da aa ad 14 1 5 Calibration Error Prompts 14 1 6 Jumpers and Switch Positions 15 1 6 1 Set for French or English Operator Messages 15 SECTION 2 ENTERING CALIBRATION 16 2 1 Start Service Progra ss ripiene pio ase 04 eee 16 2 2 Enter Calibration E A 16 2 3 Calibration A 18 SECTION 3 CALIBRATION 20 3 1 Calibrate Drive Handle beng ele eye CAR E 20 3 2 Calibrate VOltimelter men ai a 21 3 3 Calibrate Generator 22 3 3 1 Cal Generator Menu 22 3 3 2 Enter Cal Generator 23 3 3 3 Calibre MAS ee er re Rn ers are 23 3 3 4 Calibrate KVD 22 sees epee Re ker ee See ed re 25 3 3 5 Calibrate Lapse ta ee eee Ri AR 27 3 3 6 Calibrate Filament Current 28 3 3 7 End Generator Calibration 28 3 4 Calibrate Charger 2 2 3 tne een 29 3 5 Adjust Field
13. 4 Calibrate Note Note Note AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Generator kVp is calibrated at 52 64 85 and 120 About 6 to 10 exposures are taken at each kV calibration point The number of exposures depends on system operating charac teristics After some exposures the system adjusts itself Other exposures are followed by the prompt ENTER VALUE When ENTER VALUE displays enter the value from the oscilloscope Pressing mAs response to the prompt PRESS PREP will exit this procedure Note that any kVp calibration will be lost Install test equipment and kVp calibration jumper 1 To read kVp wave form install oscilloscope and either e Preferred Keithley Non Invasive kVp Divider Model 35080A with Deviation 535 or Model 35080B both using Mobile Filter Pack Plus 37946C and optional Low Range Filter Pack 38237C See Section 3 of Direction 46 017561 HHS Control and Tube Assembly Tests and Keithley s Operation and Maintenance manuals for installation No other substitutions for non invasive kVp Dividers are approved OR e Alternate High Voltage Bleeder Catalog Number C1515A Reference Direction 46 013288 Bleeder High Voltage Dual Type T8005G C1515A Connection Applications for installation If an attempt is made to verify a unit calibrated with a C1515A bleeder with a Keithley Non Invasive divider kVp reading
14. AL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 ILLUSTRATION 3 4 MAS TEST POINTS AMX1A4 5 Confirm mAs metering accuracy by repeating this procedure Readings in step 3 should agree within 0 1 mA 6 Remove mA meter by removing TP 4 connection first to prevent shorting TP 4 to ground and tripping the circuit breaker Press mAs The prompt changes to CALI BRATE MAS indicating that another selection may be made from the generator cali bration menu Note If an error message is displayed during CALIBRATE MAS record the message for your reference and press mAs to continue 25 GE MEDICAL SYSTEMS REV5 3 3
15. As Y when the required time displays The prompt changes to CAL FLD LT TIME indicating that field light calibration is complete and another selection may be made from the main calibration menu 3 6 Load Default Values DO NOT load defaults for routine calibration 31 GE MEDICAL SYSTEMS REV5 3 7 End Calibration AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Loading Default Values replaces ALL calibration values with default values Any calibration that has been done will be erased In addition any reconfigu ration of data base values will be changed back to default values This procedure replaces all calibration parameters with default values The parameters pro vide a starting point for calibration after replacing the CPU Board or RAM 1 Press either kVp or kVp until the prompt LOAD DEFAULTS displays 2 Press mAs W If defaults were loaded previously the display will alternate between mAs UP TO EXIT and mAs DWN TO LOAD If defaults were not loaded previous ly the prompt changes to DEFAULTS LOADED then to CAL REQUIRED indicat ing that Default Values have been set and calibration is required If loading defaults IS NOT desired press mAs If load defaults is desired press mAs Y This feature prevents accidental loading of defaults after a unit has been calibrated Press mAs The prompt changes to LOAD DEFAULTS indicating that default value loading is co
16. CAL GENERATOR displays then press mAs Y The prompt changes to CALIBRATE MAS indicating that the generator calibra tion menu is ready for selection e To exit CAL GENERATOR without changing any values press mAs A The prompt changes to EXITING then to CAL GENERATOR indicating that generator calibration is not active and another selection may be made from the main calibration menu 3 3 3 Calibrate mAs Refer to Direction 2173225 100 AMX 4 Service for side cover removal 1 Press either kVp A orkVp Y until the prompt CALIBRATE MAS displays then press mAs W The prompt changes to INSTALL METER indicating that mAs may be calibrated When installing meter in step 2 make the connection to TP 3 first to prevent shorting TP 4 to ground and tripping the circuit breaker 2 See Illustration 3 4 Inject approximately 100 mA into the voltage to frequency con verter by installing an mA meter between AMX1 A4 2 4 and 3 Select range to display 100 mA dc Your meter should read between 95 and 105 mA Press mAs The prompt changes to CALIBRATING then to ENTER VALUE 3 Match the displayed mAs value with the mA reading on the meter installed in step 2 Pressing kVp increases display in 0 1 mAs increments e Pressing kVp Y decreases display in 0 1 mAs increments 4 When displayed mAs and measured mA agree press MAS W The prompt changes to REMOVE METER indicating mAs is set 24 AMX 4 CALIBRATION GE MEDIC
17. CALE SELECT not asserted Then 2 9 to 4 9 volts with CHARGE SCALE SELECT asserted Then 6 8 to 8 8 volts with CHARGE SCALE SELECT asserted e The average frequency at Charger board TP 6 should be 1 8 to 2 4 kHz amp of charge current when CHARGE SCALE SE LECT is not asserted 18 to 24 Hz per milliamp of charge current when CHARGE SCALE SE LECT is asserted Drive calibration bytes check sum failed Recalibrate drive Drive calibration words check sum failed Recalibrate drive Charger calibration bytes check sum failed Recalibrate charger Charger calibration words check sum failed Recalibrate charger Battery calibration words check sum failed e Calibrate voltmeter and generator X Ray calibration bytes check sum failed Calibrate generator X Ray calibration words check sum failed Calibrate generator Field light calibration bytes check sum failed Calibrate field light Turns ratio word check sum failed e Calibrate generator 37 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 CHECK SUM ERR 10 X Ray circuit resistance words check sum failed Calibrate generator CHECK SUM ERR 11 Filament current tables have a check sum error or were not calibrated e If no other generator checksums are present Calibrate Filament Current DRIVE BYTE LIMIT Reading drive port indicated either upper or lower cal
18. Charger Boards Reading battery voltage port indicated more than 150 volts e Battery voltage must be properly calibrated Check Charger Board 33 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 BATTERY ERROR 4 Voltage value was not saved An invalid condition was detected Could not determine if battery voltage was a loaded or unloaded value e Repeat the test or calibration procedure that caused the error e Replace PROM if problem continues BATRY WORD LIMIT Data for either upper or lower battery calibration limit has been exceeded e Calibrate volt meter e Check connection between CPU and Charger Boards e Frequency at Charger Board TP 6 must be from 55 to 75 Hz per volt For example a battery voltage of 115 0 volts should produce a frequency of 6 3 to 8 6 kHz CAL CHGR ERR 1 Hardware counter overflowed while determining charging current e Frequency at Charger Board TP 6 must be less than 60 kHz Multiplexer U76 on Charger Board 46 288786G2 or Q1004 Q1005 Q1006 on Charger Board 5350026 must be operating properly CAL CHGR ERR 2 Reading battery current port indicated charge current frequency was missing Check connection between CPU and Charger Boards e Check for Digital to Analog Converter output at least 0 5 volts at TP 29 on the CPU Board Does charger charge Does charge voltage develop across charging resistor AMX1 R1 CA
19. Check filament current by checking voltage across Filament and kVp Control Board resistor AMX1 A4 A2 R188 sheet 2 location F 9 Voltage should be about 0 5 volts This is 0 1 volt per amp of filament current Check x ray tube e Check filament transformer HNDL CAL ERR 1 Reading drive handle port indicated zero point value limit exceeded Calibrate drive e Check wiring to drive handle transducers e Check for 10 volts at transducer input 5 transducer output between 2 5 and 7 5 volts e Does transducer output change when handle is moved HNDL CAL ERR 2 Calculated forward gain was out of range e Calibrate drive e Check wiring to drive handle transducers e Check for 10 volts at transducer input e Does transducer output change when handle is moved e Check that TP29 is 9 9V 1 during Handle Calibration HNDL CAL ERR 3 Calculated reverse gain was out of range e Calibrate drive Check wiring to drive handle transducers e Check for 10 volts at transducer input e Does transducer output change when handle is moved e Check that TP29 is 9 9V 1 during Handle Calibration 39 GE MEDICAL SYSTEMS REV5 HANDLE CAL ERR 4 KVP CAL ERROR 1 KVP CAL ERROR 2 KVP CAL ERROR 4 LOW FIL LIMIT AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Reading drive handle port indicated improper polarity relationship between zero forward and reverse calibration vol
20. E BEN TIGT IST ES AUFGABE DES KUNDEN F R EINE ENTSPRECHENDE BERSETZUNG ZU SORGEN VERSUCHEN SIE NICHT DAS GER T ZU REPARIEREN BEVOR DIESES KUNDENDIENST HANDBUCHNICHT ZU RATE GEZOGEN UND VERSTANDEN WURDE WIRD DIESE WARNUNG NICHT BEACHTET SO KANN ES ZU VERLETZUNGEN DES KUNDENDIENSTTECHNIKERS DES BEDIENERS ODER DES PATIENTEN DURCH ELEKTRISCHE SCHL GE MECHANISCHE ODER SONSTIGE GEFAHREN KOMMEN ESTE MANUAL DE SERVICIO S LO EXISTE EN INGLES SI ALG N PROVEEDOR DE SERVICIOS AJENO A GEMS SOLICITA UN IDIOMA QUE NO SEA EL INGLES ES RESPONSABILIDAD DEL CLIENTE OFRECER UN SERVICIO DE TRADUCCION NO SE DEBERA DAR SERVICIO TECNICO AL EQUIPO SIN HABER CONSULTADO Y COMPRENDIDO ESTE MANUAL DE SERVICIO LA NO OBSERVANCIA DEL PRESENTE AVISO PUEDE DAR LUGAR A QUE EL PROVEEDOR DE SERVICIOS EL OPERADOR O EL PACIENTE SUFRAN LESIONES PROVOCADAS POR CAUSAS ELECTRICAS MECANICAS O DE OTRA NATURALEZA GE MEDICAL SYSTEMS REV5 ATENCAO AVVERTENZA oF AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 ESTE MANUAL DE ASSISTENCIA TECNICA SO SE ENCONTRA DISPONIVEL EM INGLES SE QUALQUER OUTRO SERVICO DE ASSISTENCIA TECNICA QUE NAO A GEMS SOLICITAR ESTES MANUAIS NOUTRO IDIOMA E DA RESPONSABILIDADE DO CLIENTE FORNECER OS SERVICOS DE TRADUCAO NAO TENTE REPARAR O EQUIPAMENTO SEM CONSULTADO COMPREENDIDO MANUAL DE ASSISTENCIA TECNICA O N O CUMPRIMENTO DESTE AVISO PODE POR E
21. GE Medical Systems gemedical com Technical Publications Direction 2173223 100 Revision 5 AMX 4 Calibration Model 2169360 2236420 amp 2275938 Series Copyright 1996 1997 1999 2000 By General Electric Co GE MEDICAL SYSTEMS REV5 WARNING AVERTISSEMENT WARNUNG AVISO AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 THIS SERVICE MANUAL IS AVAILABLE IN ENGLISH ONLY IF A CUSTOMER S SERVICE PROVIDER REQUIRES A LANGUAGE OTHER THAN ENGLISH IT IS THE CUSTOMER S RESPONSIBILITY TO PROVIDE TRANSLATION SERVICES DO NOT ATTEMPT TO SERVICE THE EQUIPMENT UNLESS THIS SERVICE MANUAL HAS BEEN CONSULTED AND IS UNDERSTOOD FAILURE TO HEED THIS WARNING MAY RESULT IN INJURY TO THE SERVICE PROVIDER OPERATOR OR PATIENT FROM ELECTRIC SHOCK MECHANICAL OR OTHER HAZARDS CE MANUEL DE MAINTENANCE N EST DISPONIBLE QU EN ANGLAIS SI LE TECHNICIEN DU CLIENT A BESOIN DE CE MANUEL DANS UNE AUTRE LANGUE QUE L ANGLAIS C EST AU CLIENT QU IL INCOMBE DE LE FAIRE TRADUIRE NE PAS TENTER D INTERVENTION SUR LES EQUIPEMENTS TANT QUE LE MANUEL SERVICE N A PAS ETE CONSULTE ET COMPRIS LE NON RESPECT DE CET AVERTISSEMENT PEUT ENTRAINER CHEZ LE TECHNICIEN L OPERATEUR OU LE PATIENT DES BLESSURES DUES DES DANGERS ELECTRIQUES MECANIQUES OU AUTRES DIESES KUNDENDIENST HANDBUCH EXISTIERT NUR IN ENGLISCHER SPRACHE FALLS EIN FREMDER KUNDENDIENST EINE ANDERE SPRACH
22. L CHGR ERR 3 Either upper or lower charger calibration limit has been exceeded Calibrate charger Check connection between CPU and Charger Boards e Does CHARGE SCALE SELECT signal change state during charger calibration e The charge Digital to Analog Converter output voltage at TP 29 on the CPU Board should be in sequence as follows First 0 5 to 1 5 volts with CHARGE SCALE SELECT not asserted Then 1 5 to 2 5 volts with CHARGE SCALE SELECT not asserted Then 2 9 to 4 9 volts with CHARGE SCALE SELECT asserted Then 6 8 to 8 8 volts with CHARGE SCALE SELECT asserted 34 GE MEDICAL SYSTEMS REV5 CAL TAP ERROR 1 CAL TAP ERROR 2 CAL TAP ERROR 3 CAL TAP ERROR 4 CAL TAP ERROR 5 AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 The average frequency at Charger Board TP 6 should be 1 8 to 2 4 kHz per amp of charge current when CHARGE SCALE SELECT is not asserted 18 to 24 Hz per milliamp of charge current when CHARGE SCALE SE LECT is asserted The proper mA could not be reached by changing the kVp Repeat the Tap CAL Procedure Check mAs Calibration Check for bad connection in the x ray generator More than 140 kVp at tube voltage port with a tap selection that should provide less than 140 kVp Repeat the Tap CAL Procedure Check mAs Calibration Calibrate kVp Check generator tap relay wiring More than 35 kVp at tube voltage por
23. Light On Time 30 3 6 Load Default Values 30 3 7 Bind Calibration rss ere M ES Bat 31 SECTION 4 CALIBRATION ERROR PROMPTS 4 32 4 1 INttOdUELONE 32 4 2 Error Prompts as ee ia 32 APPENDIX A SYMBOLS 42 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 THIS PAGE INTENTIONALLY LEFT BLANK AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 REVISION HISTORY REV DATE REASON FOR CHANGE A Oct 30 1996 Draft release 0 Dec 13 1996 Initial release 1 Aug 14 1997 High Impact Inspection 2 Sept 16 1997 Added Keithly Non Invasive Divider to kVp calibration and verification Section 2 3 4 3 Apr 12 1999 Added AMX 4 Model 2236420 Series 4 Nov 8 2000 Added AMX 4 Model 2275938 Series 5 140CT2009 Added references to Q1004 Q1005 Q1006 on new Charger Board 5350026 which are equivalent to multiplexer U76 on Charger Board 46 288786 Added reference to new Controller Board 5350022 which is equivalent to old Controller Board 46 264974 LIST OF EFFECTIVE PAGES PAGE REVISION PAGE REVISION PAGE REVISION NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER Title Page 5 i thru x 5 1 1 thru 1 6 5 2 1 thru 2 4 5 3 1 thr
24. M PERIGO A SEGURANCA DO TECNICO OPERADOR OU PACIENTE DEVIDO A CHOQUES ELETRICOS MEC NICOS OU OUTROS IL PRESENTE MANUALE DI MANUTENZIONE E DISPONIBILE SOLTANTO IN INGLESE SE UN ADDETTO ALLA MANUTENZIONE ESTERNO ALLA GEMS RICHIEDE IL MANUALE IN UNA LINGUA DIVERSA IL CLIENTE E TENUTO A PROVVEDERE DIRETTAMENTE ALLA TRADUZIONE SI PROCEDA ALLA MANUTENZIONE DELL APPARECCHIATURA SOLO DOPO AVER CONSULTATO IL PRESENTE MANUALE ED AVERNE COMPRESO IL CONTENUTO NON TENERE CONTO DELLA PRESENTE AVVERTENZA POTREBBE FAR COMPIERE OPERAZIONI DA CUI DERIVINO LESIONI ALL ADDETTO ALLA MANUTENZIONE ALL UTILIZZATORE ED AL PAZIENTE PER FOLGORAZIONE ELETTRICA PER URTI MECCANICI OD ALTRI RISCHI ZOJ PAV VICILRBRLPS 9 ELA YS ABA RBUANO EX BRS LAGS MIEL ZO E RO 1 6112 DOLET O lt To IOJ EAZ Za TI R L ETF EOL A RITA BCP SV COBDS BA ADS RE OR MN LIL TOO DAS A TREED 0 YEE FOE AIRIS AECA YES FN RP BT RTF TAF AZ a METEB ARAEREFNSNEBR ER E AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 Direction 2173223 100 Revision 5 4 Calibration Model 2169360 2236420 amp 2275938 Series IMPORTANT X RAY PROTECTION equipment if not properly used may cause injury Accordingly the instructions here
25. ONVERTING then changes to REMOVE CHRG CORD The volt meter reading will change several times during the converting cycle Remove charger cord The prompt changes to CAL BATT CHARGER indicating that charger calibration is complete and another selec tion may be made from the main calibration menu 30 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 Note If an error message is displayed during CAL BATT CHARGER record the mes sage for your reference and press mAs to continue ILLUSTRATION 3 8 CHARGER PANEL a E 3 5 Adjust Field Light On Time This procedure adjusts field light illumination time between 5 and 45 seconds default time 1s 30 seconds e Press either kVp A orkVp W until the prompt CAL FLD LT TIME displays then press mAs Y The prompt changes to ENTER VALUE indicating that Field Light on Time may be set The kVp and mAs display indicates field light on time The display shows tenths of a second but only seconds are saved If a value greater than 45 seconds or less than 5 seconds is entered the error FLDLIT TIME LIMT displays until mAs A is pressed The Field Light on Time is set to the limit that was exceeded 1 Select the required lamp illumination time Holding the switch down will scroll the values Pressing kVp increases on time in 0 1 second increments e Pressing kVp Y decreases on time in 0 1 second increments 2 Press m
26. PS CALIBRATE KVP CAL FIL CUR TBL 3 4 Calibrate Charger This procedure sets the battery charging rate Charge rate is set at two voltages measured across resistor Reference Appendix for side cover removal 1 Press eitherkVp A orkVp W until the prompt CAL BATT CHARGER displays then press mAs Y The prompt changes to PLUG IN CHARGER indicating that the battery charge must be plugged into a convenience outlet e To exit CAL BATT CHARGER without changing any values press MASA e The prompt changes to EXITING then to CAL BATT CHARGER indi cating charger calibration is not active and another selection may be made from the main calibration menu See Illustration 3 8 Connect a digital volt meter across resistor AMX1 1 Select a range that displays 5 00 volts dc Plug charger cord into a convenience outlet The prompt changes to CONVERTING then to ENTER VALUE indicating that the battery charge rate may be set Match the voltage displayed on the KVp and mAs display with the reading on the me ter e Pressing kVp increases meter voltage reading e Pressing kVp W decreases meter voltage reading PressmAs Y when the displayed voltage is the same as voltmeter voltage Display changes to CONVERTING then changes to ENTER VALUE The volt meter read ing will change several times during the converting cycle Repeat step 4 and 5 for the second set point Display changes to C
27. ction Note If checksum errors are displayed when entering calibration record the message for reference and press mAs to continue To exit calibration see Section 3 7 End Calibration ILLUSTRATION 2 2 MENU SELECTION SERVICE PROGRAM kVp W PREVIOUS END SERVC MODE DATA BASE CALIBRATE SYSTEM ACCESS 18 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 2 3 Calibration Illustration 2 3 shows calibration selection path using the kVp kVp W and Menu Items mAs W switches Shaded boxes represent the six menu selections Selections are listed below in the order in which they appear when pressing kVp A 1 CAL DRIVE HANDLE Adjusts drive handle direction and sensitivity 2 CAL VOLT METER Adjusts volt meter to agree with actual battery voltage Note If voltmeter calibration is performed generator calibration must also be performed 3 CAL GENERATOR Adjusts kVp mAs and filament current 4 CAL BAT CHARGER Adjusts charging current rates for full and trickle charge 5 CAL FLD LT TIME Adjusts field light illumination time 6 LOAD DEFAULTS Installs standard operating values Note If new batteries a CPU board or a RAM are installed you must load defaults be fore running any calibration Section 3 contains calibration procedures in the order listed above ILLUSTRATION 2 3 MENU SELECTION SERVICE PROGRAM END SERVC MODE CALIBRATE SYSTEM
28. es is done at the Operator s Panel ILLUSTRATION 1 2 AMX 4 MAJOR COMPONENTS TUBE SUPPORT COLUMN OPERATOR S PANEL X RAY TUBE AND COLLIMATOR X RAY HAND SWITCH A T CASSETTE STORAGE DRAWER 13 GE MEDICAL SYSTEMS REV5 ILLUSTRATION 1 3 OPERATOR S PANEL AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 See Illustration 1 3 Calibration menu selections prompts and error codes appear on the Message Display Values appear on the kVp and mAs Display Four switches control calibration e Pressing kVp kVp up displays next menu item or increases a value e Pressing kVp W kVp down displays previous menu item or decreases a value e Pressing MAS mAs up exits selection or continues after display of a prompt for installation or removal of test equipment It also continues after display of an error condition e Pressing mAs Y mAs down executes selection or saves a value kVp AND mAs Each independently performed calibration procedure is arranged in menu order Read and understand each procedure before attempting to perform it A description of the calibration process and a listing of calibration error codes follows Switch selections and prompts are bold to help identify them Prompts are spelled the way they appear on the Message Display 14 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES
29. g the left side of the handle forward against its stop press mAs Y The prompt changes to PRESS RIGHT FWD While holding the right side of the handle forward against its stop press mAs W The prompt changes to FWD GAINS SET followed by PULL LEFT BACK While holding the left side of the handle back against its stop press MAS W The prompt changes to PULL RIGHT BACK While holding the right side of the handle back against its stop press MAS W The prompt changes to REV GAIN SET followed by CAL DRIVE HANDLE indicating that drive handle calibration is completed and another selection may be made from the main calibration menu If an error message is displayed during CAL DRIVE HANDLE record the mes sage for your reference and press mAs to continue LEFT DRIVE HANDLE 21 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 3 2 Calibrate Voltmeter Note Whenever volt meter calibration is performed you MUST perform the Generator calibration afterwards This is critical because the battery voltage is checked be fore each exposure is made Volt Meter Calibration matches displayed voltage to the actual battery voltage Battery voltage is checked before each exposure is made Refer to Direction 2173225 100 AMX 4 Service for side cover removal 1 Press either kVp A orkVp Y until the prompt CAL VOLT METER displays then press mAs 7 The prompt changes
30. he order of a physician AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 THIS PAGE INTENTIONALLY LEFT BLANK AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV DIR If you have any comments suggestions or corrections to the information in this document please write them down include the document title and document number and send them to GENERAL ELECTRIC COMPANY MEDICAL SYSTEMS MANAGER INFORMATION INTEGRATION AMERICAS W 622 P O BOX 414 MILWAUKEE WI 53201 0414 CERTIFIED ELECTRICAL CONTRACTOR STATEMENT All electrical installations that are preliminary to positioning of the equipment at the site prepared for the equipment shall be performed by licensed electrical contractors In addition electrical feeds into the Power Distribution Unit shall be performed by licensed electrical contractors Other connections between pieces of electrical equipment calibrations and testing shall be performed by qualified GE Medical personnel The products involved and the accompanying electrical installations are highly sophisticated and special engineering competence is required In performing all electrical work on these products GE will use its own specially trained field engineers All of GE s electrical work on these products will comply with the requirements of the applicable electrical codes The purchaser of GE equipment shall
31. ibration limit was exceeded Calibrate drive Check wiring to drive handle transducers e Check for 10 volts at transducer input e Does transducer output change when handle is moved 5 transducer output always between 1 and 9 volts Check the Handle Check cir cuitry AMX1 1 1 shell 5 A4 TP 29 should be 9 9V 1 during Handle Cali bration DRIVE WORD LIMIT Reading drive port indicated either upper or lower calibration limit was exceeded Calibrate drive e Check wiring to drive handle transducers e Check for 10 volts at transducer input e Does transducer output change when handle is moved 5 transducer output always between 1 and 9 volts e Check the Handle Check circuitry AMX1 A1A1 shell 5 A4 TP 29 should be 9 9V 1 during Handle Calibration FLDLIT TIME LIMIT An invalid time was entered during field light calibration Calibrate field light FLDLT BYTE LIMIT Reading field light data indicated either upper or lower time limit was exceeded Calibrate field light HIGH FIL LIMIT One or more of the filament current calibration data parameters exceed the limit 38 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 IGNORE IF e The unit is being calibrated for the first time with a new battery backed RAM e The message did not occur during filament current calibration OTHERWISE Calibrate mAs e
32. in contained should be thoroughly read and understood by everyone who will use the equipment before you attempt to place this equipment in operation The General Electric Company Medical Systems Group will be glad to assist and cooperate in placing this equipment in use Although this apparatus 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 exposing themselves or others to radiation It is important that everyone having anything to do with x radiation be properly trained and fully acquainted with the recommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reports available from NCRP Publications 7910 Woodmont Avenue Room 1016 Bethesda Maryland 20814 and of the International Commission on Radiation Protection and take adequate steps to protect against injury The equipment is sold with the understanding that the General Electric Company Medical Systems Group its agents and representatives have no responsibility for injury or damage which may result from improper use of the equipment Various protective material and devices are available It is urged that such materials or devices be used CAUTION United States Federal law restricts this device to use by or on t
33. ion by performing CAL VOLT METER before CAL GENERATOR Units within the generator calibration section are interrelated and rely on informa tion stored by the previous calibration units Always perform the generator cal ibration in complete sequence In order to insure exposure accuracy at High Technique and low battery voltage DO NOT calibrate generator when battery voltage is greater than 113 V or less than 112 V If battery voltage is greater than 113 V use Battery Load Fixture 46 302882 or run machine around corridors to get voltage down to 113 V If bat tery voltage is less than 112 V charge the machine up to increase voltage to be tween 112 V and 113 V If an external load tool is used to bring the voltage down below 113V per the above note then a full charge should be performed before using the machine for applica tions The battery monitoring algorithm will not be aware that the external load tool was used and may concluded that the batteries are weaker than they really are AMX 4 contains programmed values for mAs kVp and Filament Current Due to many variables in each machine these values are not exact Generator calibration corrects the variables Calibrating mAs is done by injecting approximately 100 mA into a voltage to frequency converter The computer integrates mA for one second to obtain 100 mAs The mAs reading is then corrected to agree with the injected mA value Kilovolt peak is cali brated by reading the kV wave f
34. minal directly connected to a point of a measuring supply or control circuit or to a screening part which is intended to be earthed for functional purposes Alternating Current Indicates equipment that is suitable for alternating current only Direct Current Indicates equipment that is suitable for direct current only Equipotentiality Identifies terminals that bring the various parts of equipment or systems to the same potential when connected together These terminals are not necessarily at earth ground potential The value of the potential may be indicated next to the symbol Indicates lock release or brake release Indicates receptacle location for hand held radiographic prep expose and field light control cable 44 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 45 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 GE Medical Systems GE Medical Systems Telex 3797371 PO Box 414 Milwaukee Wisconsin 53201 U S A Asia Pacific Latin America North America GE Medical Systems Europe Telex 698626 283 rue de la Mini re B P 34 78533 Buc Cedex France 46
35. mplete and another selection may be made from the main calibra tion menu When calibration is complete a calibration menu selection appears on the Message Dis play End calibration from the menu by doing the following 1 2 The prompt CALIBRATE SYSTEM displays Press kVp Y until the prompt END SERVC MODE displays Press mAs W The prompt changes to SWITCH TO RUN Set the Service Switch up to the application position The prompt changes to CYCLE KEY SWITCH Reset the AMX 4 using one of the following methods e Turn the Power Key off and back on e If the top cover is removed providing access to the processor board press the processor reset switch Power up test is performed and the prompt TESTING COMPLETE displays Perform a functional check of calibrated items to ensure proper operation Replace trim covers Reference Appendix B for side cover installation 32 GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 SECTION 4 CALIBRATION ERROR PROMPTS 4 1 4 2 Introduction Error Prompts CALDAT WARNING BATTERY ERROR 1 BATTERY ERROR 2 BATTERY ERROR 3 AMX 4 CALIBRATION DIRECTION 2173223 100 calibration errors are detected by software in the calibration and service PROM Errors are divided into three categories 1 Software errors like Battery Error 4 and Check Sum These involve calculations and parameter passing 2 Data errors like Cal Charger Err 3
36. operating procedures Satisfactory equipment performance requires the use of service personnel specially trained on x ray apparatus GE Medical Systems is responsible for the effects on safety reliability and performance only if the following conditions are met The electrical wiring of the relevant rooms complies with all national and local codes e All assembly operations extensions re adjustments modifications or repairs are carried out by GE Medical Systems authorized service representatives e The equipment is used in accordance with the instructions for use Refer to Direction 2166911 100 AMX 4 Operation or Direction 2166913 100 AMX 4 Interna tional Operation for proper operating procedures Only trained and qualified personnel should be permitted access to the inter nal parts of this equipment 12 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 1 3 Component Identification See Illustration 1 2 The Cassette Storage Drawer must be opened to change the Service switch to its calibration position X ray exposures are made with the X ray Hand Switch When making x ray exposures move the X ray Tube and Collimator to the bottom of the Tube Support Column Take adequate precautions to prevent the possibility of any persons carelessly unwisely or unknowingly exposing themselves or others to radiation Entering calibration commands and selecting procedur
37. orm and correcting the computer read value at 52 64 85 and 120 kVp All technique factors are selected by the computer in response to pressing switches Filament and emission current are corrected by making exposures and letting the processor correct current to provide the proper kVp If an error occurs during generator calibration and the prompt REPEAT EXPOSURE displays press MAS to continue calibration or mAs Y to exit Illustration 3 3 shows generator calibration selection path using the kVp kVp W and mAs W switches Shaded boxes represent menu selections Selections are listed below in the order in which they appear when pressing kVp A This is also the sequence to follow when recalibrating the generator 1 CALIBRATE MAS 2 CALIBRATE KVP 3 CALIBRATE TAPS 4 CAL FIL CUR TBL The units should always be performed in order from start to end If you select a calibration procedure when one before it needs calibration you may see the message MAS CAL RE QUIRED KVP CAL REQUIRED or TAP CAL REQUIRED depending on the stage of the sequence you are in 23 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 ILLUSTRATION 3 3 CAL GENERATOR MENU SELECTION CALIBRATION SEQUENCE CAL GENERATOR kp gt kVp A PREVIOUS NEXT CALIBRATE MAS CALIBRATE TAPS CALIBRATE KVP CAL FIL CUR TBL 3 3 2 Enter Cal Generator Press either kVp A orkVp Y until the prompt
38. r tap relay wiring Repeat the Tap Calibration Procedure One or more of the tap calibration parameters was out of limits data exceeded either upper or lower limit value of selected tap Either upper or lower limit of filament current calibration points has been exceeded This error always occurs after a limit error e Refer to the limit error description for additional information One or more of the Filament current table data field limits was exceeded e This error always occurs after a limit error Refer to the limit error description for ad ditional information Reading battery charger port indicated either upper or lower calibration limit exceeded Calibrate charger Reading battery charger port indicated either upper or lower calibration limit exceeded e Calibrate charger e Check connection between CPU and Charger boards e Does CHARGE SCALE SELECT signal change state during charger calibration 36 GE MEDICAL SYSTEMS REV5 CHECK SUM ERR 1 CHECK SUM ERR 2 CHECK SUM ERR 3 CHECK SUM ERR 4 CHECK SUM ERR 5 CHECK SUM ERR 6 CHECK SUM ERR 7 CHECK SUM ERR 8 CHECK SUM ERR 9 AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 e The charge Digital to Analog Converter output voltage at TP 29 on the CPU Board should be in sequence as follows First 0 5 to 1 5 volts with CHARGE SCALE SELECT not asserted Then 1 5 to 2 5 volts with CHARGE S
39. s will read 5 7 kVp higher than when read with the C1515A This is due to impedance changes in the high voltage cir cuit with the bleeder removed from the circuit and due to frequency compensation errors present using the 1515 divider with the AMX 4 waveform 2 Press either KVp orkVpY until the prompt CALIBRATE KVP displays then press mAs Y The prompt changes to INSTALL JUMPER If you are out of sequence the prompt will change to MAS CAL REQUIRED You will need to calibrate mAs first before proceeding with kVp 3 See Illustration 3 5 Install a jumper between AMX1 A4 A2 TP 14 and TP 15 Press mAs A The prompt changes to PRESS PREP Calibrate kVp Repeat steps 1 through 4 for 52 64 85 and 120kVp KVp is automatically selected by the AMX 4 The number of exposures at each calibration point depends on system operating characteristics Except on the last exposure if the oscilloscope does not capture the reading and ENTER VALUE displays enter a value 5 kVp lower than the displayed value If the scope still hasn t triggered by the next time ENTER VALUE is displayed repeat with 5 kVp higher Keep alternating between entering 5 kVp higher and lower than displayed until the oscillo scope triggers 26 GE MEDICAL SYSTEMS REV5 DIN ILLUSTRATION 3 5 KVP JUMPER LOCATION AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 1 Adjust oscilloscope to trigger on the wave form
40. t with a tap selection that should provide 35 kVp Charge if battery voltage is less than 112 volts Repeat the Tap Calibration Procedure Check mAs Calibration Calibrate kVp Check generator tap relay wiring A high order tap combination produced less kVp then a low order tap combination Check generator tap relay wiring Repeat the Tap Calibration Procedure With the filament current digital to analog converter at full count reading tube current port indicated maximum filament current does not produce enough emission current Check mAs Calibration Check filament current by checking voltage across Filament and kVp Control Board resistor AMX 4 2 R188 Voltage should be about 0 5 volts This is 0 1 volt per amp of filament current 35 GE MEDICAL SYSTEMS REV5 CAL TAP ERROR 6 CAL TAP ERROR 7 CAL TUBE ERR 1 CAL TUBE ERR 3 CHARG BYTE LIMIT CHARG WORD LIMIT AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 Check generator tap relay wiring Repeat the Tap Calibration Procedure With the filament current digital to analog converter at its lowest value reading tube cur rent port indicated filament emission current was high e Check mAs Calibration e Check filament current by checking voltage across Filament and kVp Control Board resistor AMX1 A4 A2 R188 Voltage should be about 0 5 volts This is 0 1 volt per amp of filament current e Check generato
41. tages e Was the handle moved in the correct direction in response to prompts Calibrate drive e Check that TP29 is 9 9V 1 during Handle Calibration The required kVp and mA can not be reached Tap combinations do not go high enough e Are tap relays functioning properly Calibrate mAs No tap relays pulled in and the required kVp and mA still can not be reached e Are tap relays functioning properly Check HV cables for shorts Calibrate mAs One or more of the calibration parameters is out of limits Were kVp values entered correctly Is bleeder properly calibrated e Are all tap relays functioning properly One or more of the filament current calibration data parameters is less than the minimum allowed IGNORE IF e The unit is being calibrated for the first time with a new battery backed RAM e The message did not occur during filament current calibration OTHERWISE e Calibrate mAs e Check filament current by checking voltage across Filament and kVp Control Board resistor AMX1 A4 A2 R188 sheet 2 location F 9 Voltage should be about 0 5 volts This is 0 1 volt per amp of filament current Check x ray tube Check filament transformer 40 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 MAS CAL ERROR 1 The frequency produced by injecting 100 mA during mAs meter calibration was too high causing the co
42. to 75 Hz per volt For example a battery voltage of 115 0 volts should produce a frequency of 6 3 to 8 6 kHz 41 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 X RAY BYTE LIMIT One or more of the x ray calibration parameters just adjusted are out of range DURING MAS CALIBRATION e Was correct mA value entered Check connection between CPU and Filament kVp Boards Frequency at Filament and kVp Board TP 2 must be between 14 and 18 kHz e 5 your mA meter working properly DURING TAP CALIBRATION Indicates not enough taps could be calibrated without exceeding the maximum allowable kVp e Is kVp calibration correct e is mAs calibration correct e Is battery voltage more than 117 volts X RAY WORD LIMIT One or more of the x ray calibration parameters just adjusted is out of limits DURING MAS CALIBRATION e Was correct mA value entered e Check connection between CPU and Filament kVp boards e Frequency at CPU Board TP 2 must be between 14 and 18 kHz e 5 your mA meter working properly DURING KVP CALIBRATION e Were kVp values entered correctly e Is the bleeder properly calibrated e Are all tap relays functioning properly DURING FILAMENT TABLE CALIBRATION Indicates that the turn off delay the time from the stop command being asserted to x ray on going away is greater than 2 0 ms e Is the kVp calibration jumper removed 42
43. to PRESS PREP Repeat steps through 4 b If PRESS PREP displays repeat steps 1 through 4 c If REMOVE JUMPER displays kVp calibration is finished Remove test equipment and kVp calibration jumper 1 Remove jumper from between AMX1 A4 Al TP 14 and TP 15 2 You may optionally remove the High Voltage Bleeder and install high voltage cables in tube housing at this time Reference Direction 2196272 100 High Voltage Cable Installation and Troubleshooting Procedures 27 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 3 Press MAS A The prompt changes to CALIBRATE KVP indication that kVp cali bration is complete and another selection may be made from the Generator Calibra tion Menu Note If an error message is displayed during CALIBRATE KVP record the message for your reference and press mAs to continue ILLUSTRATION 3 6 KVP WAVE FORM STABLE CALIBRATION VALUES Read kVp in this region 3 3 5 Calibrate Taps Calibrate Taps takes about 20 minutes The expected kVp appears on the kVp and mAs dis play before each exposure 1 Press either kVp A orkVp Y until the prompt CALIBRATE TAPS displays then press mAs 7 One of the following three messages will appear Select the appropriate option e If defaults have been loaded PRESS PREP will appear e If the Calibrate Taps procedure has been partially completed MAS UP RE SUME
44. u 3 12 5 4 1 thru 4 10 5 1 and 2 5 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 THIS PAGE INTENTIONALLY LEFT BLANK 10 AMX 4 CALIBRATION GE MEDICAL SYSTEMS MODEL 2169360 2236420 amp 2275938 SERIES REV5 DIRECTION 2173223 100 SECTION 1 INTRODUCTION 1 1 Identification See Illustration 1 1 The AMX 4 is identified by Model Number on the rating plate lo cated on the top cover Model part and catalog numbers are identified in Table 1 1 TABLE 1 1 AMX 4 MODELS catalog catalog DOMESTIC 2169360 7 A0659F 2236420 7 amp 2275938 7 A0659JF DOMESTIC AEC 2169360 8 A0659FA 2236420 8 amp 2275938 8 A0659JG DOMESTIC TECH SWITCH 2169360 9 A0659FC 2236420 9 amp 2275938 9 A0659JH DOMESTIC AEC TECH 2169360 10 A0659FB 2236420 10 amp 2275938 10 A0659JJ SWITCH IEC EMC AEC TECH SWITCH A0659JC JAPAN SHORT COLUMN 2169360 6 A0659D 2236420 6 amp 2275938 6 AO659JE ILLUSTRATION 1 1 AMX 4 IDENTIFICATION RATING PLATE 11 GE MEDICAL SYSTEMS REV5 1 2 General AMX 4 CALIBRATION MODEL 2169360 2236420 amp 2275938 SERIES DIRECTION 2173223 100 The AMX 4 contains operating safeguards providing maximum safety Before servicing be certain proper operating procedures are being used Refer to Direction 2166911 100 AMX 4 Operation or Direction 2166913 100 AMX 4 International Operation for proper
45. unter to overflow Was the injected current more than 110 mA 5 the frequency at Filament and kVp Control Board TP 2 more than 18 kHz MAS CAL ERROR 4 The check to see if data base parameters are being written correctly produced an error Check data bus connection to CPU Board Check battery backed RAM RAM READBACK ERR Data read from memory location is not what was written to that location SYS RESIST LIMIT The slope of emission current versus kVp was calculated to be either too flat or too steep at the last tap selection This error is valid only during tap calibration e Is mAs properly calibrated Is kVp properly calibrated e Batteries may be soft Charge the batteries TURN RATIO LIMIT The battery voltage to kVp multiplication factor effective turns ratio was out of range for one or more tap combinations e Is mAs properly calibrated Is kVp properly calibrated e Batteries may be soft Charge the batteries VOLTMETER ERR 1 Battery voltage frequency is to high causing the counter to overflow 5 the frequency at Charger Board TP 6 more than 10 kHz Multiplexer U76 on Charger Board 46 288786G2 or 01004 01005 01006 on Charger Board 5350026 must be operating properly VOLTMETER ERR 4 One or more of the battery voltage calibration data base parameters is out of range Calibrate volt meter Check connection between CPU and Charger Boards Frequency at Charger Board TP 6 must be from 55
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