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X-Ray & ABS

LVPS-400 PCB

WARNING:

High Voltage: Do not attempt to service the generator until DS8 (neon - orange) is extinguished.

Even

when the LEDs are extinguished, the voltage could still be over +90 volts. Check the DC Bus first with a DVM
before performing any service on this PCB.

Caution:

The rectifier bridge on this PCB can become very hot.

Содержание OEC UroView 2800

Страница 1: ... Generator Control 8 Manual kVp Control 8 Manual mA mAs Control 9 Auto Fluoro Mode 10 Auto Brightness Stabilization Control ABS 10 Pulse 12 Low Dose 13 X Ray Footswitch 14 Fault Isolation 15 Functional Tests 17 Beam Alignment Verification 17 Fluoro Alignment 17 Film Alignment 17 Disassembly 18 X Ray Stator Test 20 kVp mA Servo Loop Test 20 Auto Technique Tracking 21 Boost 21 Pulsed Boost 22 Verify...

Страница 2: ...cs Illustrated Parts Installation Filament Drive PCB 25 Rotation PCB 27 Indicators 29 J2 Wiring 29 Gate CMD PCB 30 kV Control PCB 32 Switches and Jumpers 33 Indicators 33 AC DC 3 Phase PCB 34 AC DC Single Phase PCB 36 AEC PCB V2 38 IGBT PCB 40 LVPS 400 PCB 41 ...

Страница 3: ...f the heat protection curve of the x ray tube and feature efficient installation no generator calibration and application error codes to ensure fast troubleshooting The generator is composed of a high voltage chain including the kV Control PCB power inverter and HV Tank Anode Rotation PCB Tube Filaments Heater PCB and a control bus for communication between the functions A DC bus is utilized for p...

Страница 4: ... high voltage power components and connections for the HV Cables for the X ray tube The Inverter power assembly contains the Generic Interface PCB AEC PCB the PPC kV Control PCB the IGBT PCB and the Gate Command PCB The physical location of the modules within the generator frame assembly is shown in the following illustration The three modules on the top level are hinged to swing outward from the ...

Страница 5: ...S 5 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation LVPS 400 Single or Three Phase Power Assembly AC DC Module Rotation Module HV Power Module HV Tank Generator Assembly Diagram ...

Страница 6: ...0VDC DS1 is provided to the Heater PCB The 15V rise triggers the 5V rise on the kV Control Heater and Rotation PCBs LED DS3 turned ON At this stage many actions occur in parallel on the other generator PCBs These actions are described for each PCB within this manual section Exception handling The generator software performs an auto test at power up and continuously monitors the correct operation o...

Страница 7: ...erter safety levels The micro controller receives speed and braking commands and controls the rotation accordingly It measures the inverter currents regulates the inverter fundamental and modulation and relays error feedback to the main software It also puts the rotation in a safe state in case of error reads the tube safety parameters and drives tube cooling All rotation states are regulated exce...

Страница 8: ...y CANbus to the Generator Power Module Generic Interface card This standard interface PCB provides a CAN bus communication line for command signals between the generator and the system The Interface card passes the command to the kV Control PCB The kV Control PCB functions as the main control of the generator The CPU in this card passes the manual kVp command to the kV Measure PCB which resides on...

Страница 9: ...kV and exposure time commands When the CPU receives the exposure enable signal it calculates the acquisition filament drive to apply to the tube filament to match the required tube mA This calculation is based on the filament drive values stored in the tube database and the interpolation required to calculate the filament drive for the kV and mA point selected manually by the operator In addition ...

Страница 10: ...he last Manual setting for kVp The system adjusts the technique as necessary so as not to exceed a 20 R minute dose maximum for all continuous HLF X rays The system also adjusts the technique as necessary so as not to exceed a 10 R minute dose maximum for all continuous non HLF X rays All non film X rays begin with non HLF continuous X ray generation If on the 3rd frame after X rays have begun the...

Страница 11: ...vel index mA ABS adjusts the mA value Camera Gain ABS adjusts the Camera Gain Camera Iris Iris fully open KVp mA and Camera Gain are looked up in an ABS table and set accordingly ABS Control during Manual Fluoro Mode Function Description kVp Manual adjustment of kVp value mA Manual adjustment of the mA value Camera Gain ABS adjusts the Camera Gain until the video level equals the value contained i...

Страница 12: ...fully closed ABS Control during Boost Fluoro Mode Function Description kVp kVp frozen at its current value by software mA mA is incremented until the video level equals the video level index Camera Gain Camera Gain is reduced and the ABS system adjusts mA to achieve correct video level If the correct video level is not reached before the mA limit is reached the camera gain is increased Camera Iris...

Страница 13: ...e The CPU checks to see if the system is in Film or Digital Spot Mode or if an exposure is underway and if not allows the Pulse command to be sent The output control signal from the CPU card via the X Ray Control Interface PCB is then sent via ARCnet to the Table Generator Interface Card The state of pulsed imaging is also communicated to the Workstation when the state changes This is done so the ...

Страница 14: ...via ARCnet to the system for display and execution The command is sent on the CANbus to the Generator Generic Interface PCB and then to the kV Control PCB CPU to control the exposure The footswitches receive power via the I Source line This line delivers current from the Table Generator Interface card to the switch Activation of the footswitch causes current to flow from the I Source line to the F...

Страница 15: ...intensifier See Diagnostics section Perform the Auto Technique Tracking Test Failed to servo to correct kVp range with copper filter inserted Check the ABS control circuitry camera alignment and image intensifier Perform the Boost Test No audible alarm mA doesn t adjust Image too dark or too light Check the ABS control circuitry camera alignment and image intensifier Perform the Pulsed Boost Test ...

Страница 16: ...atics Illustrated Parts Installation Test Failure Check Perform the Generator Functional Check mA mAs max min values out of tolerance Perform Generator Performance Check Check individual PCB adjustments as shown in Adjustments section See Diagnostics section ...

Страница 17: ...MAG2 field shot and verify all four leaves show in the image 4 Turn on the Collimator Lamp 5 Select Fluoro Mode and verify you can collimate to less than 5 cm x 5 cm as indicated by the illuminated area Film Alignment 1 Set the technique to 40 kVp 100 mAs and enable AEC mode 2 Fully open the collimator leaves and then move the leaves inward approximately 1 inch 3 Take a film exposure and then deve...

Страница 18: ...can be made only on the left side of the Inverter Unit Refer to the Generator Assembly Diagram in this section 1 Unscrew the screws see note below securing the two EMC cover panels 1 on the HV connections side and remove them Note Do not to let screws fall into the HV connector receptacles Cover the receptacles with plastic caps ...

Страница 19: ...X Ray ABS 19 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation ...

Страница 20: ...tator motor is rotating by listening for the whirring sound coming from the X ray tube head 3 Verify that the control Panel does not display the error message Stator not on If the message is displayed refer to the Diagnostics section of this manual and correct the problem kVp mA Servo Loop Test WARNING Steps within this procedure produce x rays Use appropriate precautions 1 Select MANUAL FLUORO mo...

Страница 21: ...e 3 Record the kVp value in the table Copper Filters kVp range 1 61 kVp 3 kVp 2 71 kVp 3 kVp 3 79 kVp 3 kVp Boost WARNING Steps within this procedure produce x rays Use appropriate precautions 1 Place a copper filter on the Image Intensifier Enable BOOST on the control panel by pressing the BOOST ENABLE button 2 Select AUTO FLUORO mode and take an exposure Once the image has stabilized take anothe...

Страница 22: ...ST footswitch 3 Verify that the audible alarm beeps at twice the normal rate 4 Verify that the mA elevates until the image becomes stable Verify Fluoro Timer and Timer Test 1 In FLUORO mode the accumulated exposure time is displayed in the center of the display panel After five minutes of accumulated fluoro x rays the timer alarm will sound 2 Press ALARM RESET to reset the alarm The alarm will sto...

Страница 23: ...ion This section shows the circuit boards of the OEC Uroview 2800 generator In the illustrations the main indicators LEDs and fuses are detailed kV Measure PCB Caution This board forms part of the oil seal of the High Voltage Tank It can only be removed at the factory The Field Replaceable Unit FRU is the complete HV Tank ...

Страница 24: ...X Ray ABS 24 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation LF C SF ...

Страница 25: ...ay ABS 25 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation Filament Drive PCB WARNING High Voltage Do not attempt to service the generator until indicator DS3 is extinguished ...

Страница 26: ...Parts Installation RST Red Board being reset or powered up SF_LF Yellow Small Focus Large Focus Relay Feedback DS2 Yellow Status LED DS1 Yellow Status LED DS3 Green 160v DC present DS4 Yellow Inverter Output Running ON Yellow Inverter Command ON DC 160v LF Common SF 0 160v DC ...

Страница 27: ...tion Rotation PCB WARNING High Voltage Do not attempt to service the generator until indicators DS6 and DS7 neon orange are extinguished Even when the LEDs are extinguished the voltage could still be over 90 volts Check the DC Bus first with a DVM before performing any service on this PCB ...

Страница 28: ...X Ray ABS 28 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation DS6 Common DC bus Auxiliary DC bus Main DC bus ...

Страница 29: ...low THE INVERTER IS RUNNING DS1 Green PRESENCE OF 15 V SUPPLY DS2 Green PRESENCE OF 15 V SUPPLY DS3 Green PRESENCE OF 5 V SUPPLY DS4 DS5 Yellow BOARD STATUS DS6 Neon orange FAN VAC POWER SUPPLY PRESENT DS7 Neon orange DC BUS PRESENT J2 Wiring 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 X ray tube Thermal safety Fan 115V AC Line input Fan 115V AC Line 115V Sense used for fan cooling tube ...

Страница 30: ...ance Contents Schematics Illustrated Parts Installation Gate CMD PCB WARNING High voltage Do not touch this PCB until DS300 on this PCB and DS1 on the Dual Snubber PCB are extinguished Caution Hot surface on transformer T300 and heat sink ...

Страница 31: ...10 V Supply on low IGBT Gate Command DS202 Green Presence of 10 V Supply on high IGBT Gate Command DS300 Neon Orange Presence of voltage on DC bus for Flyback Converter to create power supplies for both Gate Commands Insulated Gate Bipolar Transistor D S3 00 D S2 01 D S2 02 DS201 Green Presence of 20 V Supply on high IGBT Gate Command DC bus Inverter current feedback ILP ILR Parallel inductor temp...

Страница 32: ...X Ray ABS 32 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation kV Control PCB ...

Страница 33: ...ellow INVERTER GATE POWER SUPPLY OK TX_TAV Yellow TRANSMIT TO SERVICE LAPTOP RX_TAV Yellow RECEIVE FROM SERVICE LAPTOP TX_CONS Yellow TRANSMIT TO CONSOLE IF EXISTING RX_CONS Yellow RECEIVE FROM CONSOLE IF EXISTING T_CAN_X Yellow SYSTEM CAN BUS TRANSMIT R_CAN_X Yellow SYSTEM CAN BUS RECEIVE HALT Red MICROPROCESSOR HALTED RESET Red BOARD BEING RESET S0 TO S7 Yellow STATUS LED IN APPLICATION MODE THE...

Страница 34: ...PCB WARNING High voltage Do not attempt to service generator until DS1 neon orange is extinguished Even when the LEDs are extinguished the voltage could still be over 90 volts Check the DC Bus first with a DVM before performing any service on this PCB Caution Some components on this board can become very hot ...

Страница 35: ...ontents Schematics Illustrated Parts Installation F1 Fuse Protects on DC Bus LV Power Supply 3 Phase PCB Rotor Board High Speed Gate Command PCB Type 15 A 600 VDC DS1 Neon Orange Indi cates presence of voltage on the DC Bus DC Bus out DC Bus to ...

Страница 36: ...X Ray ABS 36 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation AC DC Single Phase PCB This PCB is only used with the single phase generator ...

Страница 37: ...X Ray ABS 37 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation ...

Страница 38: ...X Ray ABS 38 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation AEC PCB V2 N1 Orange neon Presence of 230 VDC AEC3 AEC4 AEC2 AEC1 ...

Страница 39: ...OINT MEASUREMENT SIGNAL RANGE TP1 230 VDC 230 VDC _5 TP2 230 VDC 230 VDC _5 TP3 230 VDC 230 VDC _5 TP4 230 VDC 230 VDC _5 TP5 AEC assignment reference 0 to 10 V TP6 10 VDC reference 10 VDC _1 TP7 AEC return voltage TP8 AEC1 return voltage TP9 AEC2 return voltage TP10 AEC3 return voltage TP11 AEC4 return voltage ...

Страница 40: ...ntenance Contents Schematics Illustrated Parts Installation IGBT PCB WARNING High voltage Do not attempt to service the generator until indicator DS1 neon orange is extinguished DS1 DS2 LED green Indicates presence of voltage on DC Bus ...

Страница 41: ...RNING High Voltage Do not attempt to service the generator until DS8 neon orange is extinguished Even when the LEDs are extinguished the voltage could still be over 90 volts Check the DC Bus first with a DVM before performing any service on this PCB Caution The rectifier bridge on this PCB can become very hot ...

Страница 42: ...X Ray ABS 42 Service Periodic Maintenance Contents Schematics Illustrated Parts Installation ...

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